diff --git a/README.md b/README.md
index 684d9f7..51d09e7 100644
--- a/README.md
+++ b/README.md
@@ -2321,10 +2321,10 @@ for(let i = 0; i < files.length; i++){
 - Using the `async` variants like `.searchAsync` is now deprecated (but still works), asynchronous responses will always return from Worker-Index and from Persistent-Index, everything else will return a non-promised result. Having both types of methods looks like the developers can choose between them, but they can't.
 - Any of your exports from versions below v0.8 are not compatible to import into v0.8
 
-## Not finished yet
+## What's next?
 
 Unfortunately, not everything could be finished and needs to be done in the upcoming version.
 
-- The `Resolver` does not support Document-Indexes, there is still some work to do.
+- The `Resolver` currently does not support Document-Indexes, there is still some work to do.
 - Config serialization for persistent indexes (store configuration, check migrations, import and restore field configurations)
-- Tooling for persistent indexes (list all tables, remove tables)
\ No newline at end of file
+- Tooling for persistent indexes (list all tables, remove tables)
diff --git a/demo/autocomplete.html b/demo/autocomplete.html
index 816de3e..a3030db 100644
--- a/demo/autocomplete.html
+++ b/demo/autocomplete.html
@@ -76,8 +76,8 @@
 <div id="suggestions"></div>
 <script type="module">
 
-    import { Document, Charset } from "../dist/flexsearch.bundle.module.min.js";
-    import data from "./data/movies.js";
+    import { Document, Charset } from "https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.bundle.module.min.js";
+    import data from "https://rawcdn.githack.com/nextapps-de/flexsearch/master/demo/data/movies.js";
 
     (function(){
 
diff --git a/dist/db/indexeddb/index.cjs b/dist/db/indexeddb/index.cjs
index 799d863..cbaef6e 100644
--- a/dist/db/indexeddb/index.cjs
+++ b/dist/db/indexeddb/index.cjs
@@ -957,11 +957,11 @@ async function handler(data) {
 
         case "init":
 
-            /** @type IndexOptions */
+            /** @type {IndexOptions} */
             let options = data["options"] || {};
             let filepath = options.config;
             if(filepath){
-                options = filepath;
+                options = options;
                 // will be replaced after build with the line below because
                 // there is an issue with closure compiler dynamic import
                 options = (await import(filepath))["default"];
@@ -1007,7 +1007,7 @@ let pid = 0;
  * @constructor
  */
 
-function WorkerIndex(options = {}){
+function WorkerIndex(options = /** @type IndexOptions */ ({})){
 
     if(!this || this.constructor !== WorkerIndex) {
         return new WorkerIndex(options);
@@ -2939,7 +2939,7 @@ function intersect_union(mandatory, arrays) {
  * @param {number|DocumentSearchOptions=} limit
  * @param {DocumentSearchOptions=} options
  * @param {Array<Array>=} _promises For internal use only.
- * @returns {Promise|Array}
+ * @returns {DocumentSearchResults|EnrichedDocumentSearchResults|MergedDocumentSearchResults|Promise<DocumentSearchResults|EnrichedDocumentSearchResults|MergedDocumentSearchResults>}
  */
 
 Document.prototype.search = function(query, limit, options, _promises){
@@ -2955,16 +2955,17 @@ Document.prototype.search = function(query, limit, options, _promises){
         }
     }
 
-    let result = [], result_field = [];
+    let result = [];
+    let result_field = [];
     let pluck, enrich, merge, suggest;
     let field, tag, offset, count = 0, highlight;
 
     if(options){
 
         if(is_array(options)){
-            options = {
+            options = /** @type DocumentSearchOptions */ ({
                 index: options
-            };
+            });
         }
 
         query = options.query || query;
@@ -3496,8 +3497,9 @@ function Document(options){
         return new Document(options);
     }
 
-    /** @type DocumentDescriptor */
-    const document = options.document || options.doc || options;
+    const document = /** @type DocumentDescriptor */ (
+        options.document || options.doc || options
+    );
     let tmp, keystore;
 
     this.tree = [];
@@ -3514,7 +3516,7 @@ function Document(options){
 
     {
         // todo support custom filter function
-        this.storetree = (tmp = document.store || null) && tmp !== true && [];
+        this.storetree = (tmp = document.store || null) && tmp && tmp !== true && [];
         this.store = tmp && (
             keystore && SUPPORT_KEYSTORE
                 ? new KeystoreMap(keystore)
@@ -3620,7 +3622,7 @@ function Document(options){
                 let index;// = this.index.get(field);
                 //if(!index){
                     // create raw index when not exists
-                    this.index.set(field, index = new Index({}, this.reg));
+                    this.index.set(field, index = new Index(/** @type IndexOptions */ ({}), this.reg));
                     // copy and push to the field selection
                     if(fields === this.field){
                         fields = fields.slice(0);
@@ -3712,7 +3714,7 @@ function parse_descriptor(options, document){
             key = key.field;
         }
 
-        opt = /** @type DocumentIndexOptions */ (
+        opt = /** @type IndexOptions */ (
             is_object(opt)
                 ? Object.assign({}, options, opt)
                 : options
@@ -3732,7 +3734,7 @@ function parse_descriptor(options, document){
         }
 
         if(!this.worker){
-            index.set(key, new Index(opt, this.reg));
+            index.set(key, new Index(/** @type IndexOptions */ (opt), this.reg));
         }
 
         if(opt.custom){
@@ -3942,9 +3944,9 @@ Document.prototype.cleanup = function(){
 }
 
 /**
- * @param {string|Object} query
- * @param {number|Object=} limit
- * @param {Object=} options
+ * @param {string|SearchOptions|DocumentSearchOptions} query
+ * @param {number|SearchOptions|DocumentSearchOptions=} limit
+ * @param {SearchOptions|DocumentSearchOptions=} options
  * @this {Index|Document}
  * @returns {Array<number|string>|Promise}
  */
@@ -4125,7 +4127,7 @@ const options$4 = {
     matcher: matcher
 };
 
-/** @type EncoderOptions */
+/** @type {EncoderOptions} */
 const options$3 = {
     normalize: true,
     dedupe: false,
@@ -4259,7 +4261,7 @@ var Charset = {
 // COMPILER BLOCK -->
 
 /**
- * @enum {Object}
+ * @type {Object<string, IndexOptions>}
  * @const
  */
 
@@ -4293,24 +4295,28 @@ const presets = {
 
 /**
  *
- * @param {!IndexOptions|string} options
+ * @param {IndexOptions|string} options
  * @return {IndexOptions}
  */
 
 function apply_preset(options){
 
-    const preset = is_string(options)
-        ? options
-        : options["preset"];
+    const preset = /** @type string */ (
+        is_string(options)
+            ? options
+            : options.preset
+    );
 
     if(preset){
         if(!presets[preset]){
             console.warn("Preset not found: " + preset);
         }
-        options = Object.assign({}, presets[preset], /** @type {Object} */ (options));
+        options = /** @type IndexOptions */ (
+            Object.assign({}, presets[preset], /** @type {Object} */ (options))
+        );
     }
 
-    return options;
+    return /** @type IndexOptions */ (options);
 }
 
 const data = create_object();
@@ -4788,8 +4794,8 @@ function resolve_default(result, limit, offset, enrich){
 function enrich_result(ids){
     for(let i = 0; i < ids.length; i++){
         ids[i] = {
-            score: i,
-            id: ids[i]
+            "score": i,
+            "id": ids[i]
         };
     }
     return ids;
@@ -5571,7 +5577,7 @@ function set_resolve(resolve){
  * @param {string|SearchOptions} query
  * @param {number|SearchOptions=} limit
  * @param {SearchOptions=} options
- * @returns {Array|Resolver|Promise<Array|Resolver>}
+ * @returns {SearchResults|EnrichedSearchResults|Resolver|Promise<SearchResults|EnrichedSearchResults|Resolver>}
  */
 
 Index.prototype.search = function(query, limit, options){
@@ -5589,7 +5595,7 @@ Index.prototype.search = function(query, limit, options){
 
     let result = [];
     let length;
-    let context, suggest, offset = 0, resolve, enrich, tag, boost;
+    let context, suggest, offset = 0, resolve, enrich, tag, boost, resolution;
 
     if(options){
         query = options.query || query;
@@ -5601,6 +5607,7 @@ Index.prototype.search = function(query, limit, options){
         resolve || (global_resolve = 0);
         enrich = resolve && options.enrich;
         boost = options.boost;
+        resolution = options.resolution;
         tag = this.db && options.tag;
     }
     else {
@@ -5611,15 +5618,16 @@ Index.prototype.search = function(query, limit, options){
 
     // do not force a string as input
     // https://github.com/nextapps-de/flexsearch/issues/432
-    query = /** @type {Array<string>} */ (this.encoder.encode(query));
-    length = query.length;
+    /** @type {Array<string>} */
+    let query_terms = this.encoder.encode(query);
+    length = query_terms.length;
     limit || !resolve || (limit = 100);
 
     // fast path single term
     if(length === 1){
         return single_term_query.call(
             this,
-            query[0], // term
+            query_terms[0], // term
             "",       // ctx
             limit,
             offset,
@@ -5638,8 +5646,8 @@ Index.prototype.search = function(query, limit, options){
     if(length === 2 && context && !suggest){
         return single_term_query.call(
             this,
-            query[0], // term
-            query[1], // ctx
+            query_terms[0], // term
+            query_terms[1], // ctx
             limit,
             offset,
             resolve,
@@ -5659,7 +5667,7 @@ Index.prototype.search = function(query, limit, options){
         const query_new = [];
 
         // if(context){
-        //     keyword = query[0];
+        //     keyword = query_terms[0];
         //     dupes[keyword] = 1;
         //     query_new.push(keyword);
         //     maxlength = minlength = keyword.length;
@@ -5668,7 +5676,7 @@ Index.prototype.search = function(query, limit, options){
 
         for(let i = 0, term; i < length; i++){
 
-            term = query[i];
+            term = query_terms[i];
 
             if(term && !dupes[term]){
 
@@ -5696,7 +5704,7 @@ Index.prototype.search = function(query, limit, options){
             // }
         }
 
-        query = query_new;
+        query_terms = query_new;
         length = query.length;
     }
 
@@ -5714,7 +5722,7 @@ Index.prototype.search = function(query, limit, options){
     if(length === 1){
         return single_term_query.call(
             this,
-            query[0], // term
+            query_terms[0], // term
             "",       // ctx
             limit,
             offset,
@@ -5728,8 +5736,8 @@ Index.prototype.search = function(query, limit, options){
     if(length === 2 && context && !suggest){
         return single_term_query.call(
             this,
-            query[0], // term
-            query[1], // ctx
+            query_terms[0], // term
+            query_terms[1], // ctx
             limit,
             offset,
             resolve,
@@ -5741,7 +5749,7 @@ Index.prototype.search = function(query, limit, options){
     if(length > 1){
         if(context){
             // start with context right away
-            keyword = query[0];
+            keyword = query_terms[0];
             index = 1;
         }
         // todo
@@ -5750,17 +5758,21 @@ Index.prototype.search = function(query, limit, options){
             // bigger terms has less occurrence
             // this might also reduce the intersection task
             // todo check intersection order
-            query.sort(sort_by_length_down);
+            query_terms.sort(sort_by_length_down);
         }
     }
 
+    if(!resolution && resolution !== 0){
+        resolution = this.resolution;
+    }
+
     // from this point there are just multi-term queries
 
     if(this.db){
 
         if(this.db.search){
             // when the configuration is not supported it returns false
-            const result = this.db.search(this, query, limit, offset, suggest, resolve, enrich, tag);
+            const result = this.db.search(this, query_terms, limit, offset, suggest, resolve, enrich, tag);
             if(result !== false) return result;
         }
 
@@ -5769,7 +5781,7 @@ Index.prototype.search = function(query, limit, options){
 
             for(let arr, term; index < length; index++){
 
-                term = query[index];
+                term = query_terms[index];
 
                 if(keyword){
 
@@ -5799,7 +5811,7 @@ Index.prototype.search = function(query, limit, options){
                         arr,
                         result,
                         suggest,
-                        self.resolution,
+                        resolution,
                         // 0, // /** @type {!number} */ (limit),
                         // 0, // offset,
                         // length === 1
@@ -5833,14 +5845,14 @@ Index.prototype.search = function(query, limit, options){
             }
 
             return resolve
-                ? intersect$1(result, self.resolution, /** @type {number} */ (limit), offset, suggest, boost, resolve)
+                ? intersect$1(result, resolution, /** @type {number} */ (limit), offset, suggest, boost, resolve)
                 : new Resolver(result[0])
         }());
     }
 
     for(let arr, term; index < length; index++){
 
-        term = query[index];
+        term = query_terms[index];
 
         if(keyword){
 
@@ -5869,7 +5881,7 @@ Index.prototype.search = function(query, limit, options){
                 arr,
                 result,
                 suggest,
-                this.resolution,
+                resolution,
                 // 0, // /** @type {!number} */ (limit),
                 // 0, // offset,
                 // length === 1
@@ -5896,13 +5908,13 @@ Index.prototype.search = function(query, limit, options){
             }
             else if(length === 1){
                 return resolve
-                    ? resolve_default(result[0], limit, offset)
+                    ? resolve_default(result[0], /** @type {number} */ (limit), offset)
                     : new Resolver(result[0]);
             }
         }
     }
 
-    result = intersect$1(result, this.resolution, limit, offset, suggest, boost, resolve);
+    result = intersect$1(result, resolution, limit, offset, suggest, boost, resolve);
 
     return resolve
         ? result
@@ -5947,8 +5959,8 @@ function single_term_query(term, keyword, limit, offset, resolve, enrich, tag){
  * @private
  * @param {Array} arr
  * @param {Array} result
- * @param {Array} suggest
- * @param {number} resolution
+ * @param {boolean|null=} suggest
+ * @param {number=} resolution
  * @return {Array|boolean|undefined}
  */
 
@@ -6238,12 +6250,16 @@ function Index(options, _register){
 
     tick("Index.create");
 
-    options = options
-        ? apply_preset(options)
-        : {};
+    options = /** @type IndexOptions */ (
+        options
+            ? apply_preset(options)
+            : {}
+    );
 
+    let tmp = options.context;
     /** @type ContextOptions */
-    const context = options.context || {};
+    const context = tmp === true
+        ? { depth: 1 } : tmp || {};
     const encoder = is_string(options.encoder)
         ? Charset[options.encoder]
         : options.encode || options.encoder || (
@@ -6253,7 +6269,7 @@ function Index(options, _register){
     this.encoder = encoder.encode
         ? encoder
         : typeof encoder === "object"
-            ? (new Encoder(encoder)
+            ? (new Encoder(/** @type {EncoderOptions} */ (encoder))
                 
             )
             : { encode: encoder };
@@ -6262,7 +6278,6 @@ function Index(options, _register){
         this.compress = options.compress || options.compression || false;
     }
 
-    let tmp;
     this.resolution = options.resolution || 9;
     this.tokenize = tmp = options.tokenize || "strict";
     this.depth = (tmp === "strict" && context.depth) || 0;
@@ -6280,7 +6295,7 @@ function Index(options, _register){
             ? (tmp && SUPPORT_KEYSTORE ? new KeystoreMap(tmp) : new Map())
             : (tmp && SUPPORT_KEYSTORE ? new KeystoreSet(tmp) : new Set())
     );
-    this.resolution_ctx = context.resolution || 1;
+    this.resolution_ctx = context.resolution || 3;
     this.rtl = (encoder.rtl) || options.rtl || false;
 
     {
@@ -6469,7 +6484,7 @@ function IdxDB(name, config = {}){
     }
     if(typeof name === "object"){
         name = name.name;
-        config = name;
+        config = /** @type PersistentOptions */ (name);
     }
     if(!name){
         console.info("Default storage space was used, because a name was not passed.");
diff --git a/dist/flexsearch.bundle.debug.js b/dist/flexsearch.bundle.debug.js
index e08e6e7..eaa5d8e 100644
--- a/dist/flexsearch.bundle.debug.js
+++ b/dist/flexsearch.bundle.debug.js
@@ -6,15 +6,15 @@
  * https://github.com/nextapps-de/flexsearch
  */
 (function _f(self){'use strict';if(typeof module!=='undefined')self=module;else if(typeof process !== 'undefined')self=process;self._factory=_f;
-var v;
+var u;
 function z(a, b, c) {
   const d = typeof c, e = typeof a;
   if ("undefined" !== d) {
     if ("undefined" !== e) {
       if (c) {
         if ("function" === e && d === e) {
-          return function(h) {
-            return a(c(h));
+          return function(k) {
+            return a(c(k));
           };
         }
         b = a.constructor;
@@ -44,7 +44,7 @@ function z(a, b, c) {
   }
   return "undefined" === e ? b : a;
 }
-function B() {
+function C() {
   return Object.create(null);
 }
 function aa(a, b) {
@@ -97,7 +97,8 @@ function K(a) {
     this.assign(arguments[b]);
   }
 }
-K.prototype.assign = function(a) {
+u = K.prototype;
+u.assign = function(a) {
   this.normalize = z(a.normalize, !0, this.normalize);
   let b = a.include, c = b || a.exclude || a.split;
   if ("object" === typeof c) {
@@ -138,26 +139,77 @@ K.prototype.assign = function(a) {
   this.minlength = z(a.minlength, 1, this.minlength);
   this.maxlength = z(a.maxlength, 0, this.maxlength);
   if (this.cache = c = z(a.cache, !0, this.cache)) {
-    this.L = null, this.S = "number" === typeof c ? c : 2e5, this.H = new Map(), this.J = new Map(), this.A = this.h = 128;
+    this.L = null, this.S = "number" === typeof c ? c : 2e5, this.H = new Map(), this.I = new Map(), this.M = this.B = 128;
   }
-  this.B = "";
+  this.h = "";
+  this.N = null;
+  this.A = "";
   this.O = null;
-  this.M = "";
-  this.P = null;
   if (this.matcher) {
     for (const d of this.matcher.keys()) {
-      this.B += (this.B ? "|" : "") + d;
+      this.h += (this.h ? "|" : "") + d;
     }
   }
   if (this.stemmer) {
     for (const d of this.stemmer.keys()) {
-      this.M += (this.M ? "|" : "") + d;
+      this.A += (this.A ? "|" : "") + d;
     }
   }
   return this;
 };
-K.prototype.encode = function(a) {
-  if (this.cache && a.length <= this.h) {
+u.addMatcher = function(a, b) {
+  if ("object" === typeof a) {
+    return this.addReplacer(a, b);
+  }
+  if (2 > a.length) {
+    return this.addMapper(a, b);
+  }
+  this.matcher || (this.matcher = new Map());
+  this.matcher.set(a, b);
+  this.h += (this.h ? "|" : "") + a;
+  this.N = null;
+  this.cache && L(this);
+  return this;
+};
+u.addStemmer = function(a, b) {
+  this.stemmer || (this.stemmer = new Map());
+  this.stemmer.set(a, b);
+  this.A += (this.A ? "|" : "") + a;
+  this.O = null;
+  this.cache && L(this);
+  return this;
+};
+u.addFilter = function(a) {
+  this.filter || (this.filter = new Set());
+  this.filter.add(a);
+  this.cache && L(this);
+  return this;
+};
+u.addMapper = function(a, b) {
+  if ("object" === typeof a) {
+    return this.addReplacer(a, b);
+  }
+  if (1 < a.length) {
+    return this.addMatcher(a, b);
+  }
+  this.mapper || (this.mapper = new Map());
+  this.mapper.set(a, b);
+  this.cache && L(this);
+  return this;
+};
+u.addReplacer = function(a, b) {
+  "string" === typeof a && (a = new RegExp(a, "g"));
+  this.replacer || (this.replacer = []);
+  this.replacer.push(a, b || "");
+  this.cache && L(this);
+  return this;
+};
+function L(a) {
+  a.H.clear();
+  a.I.clear();
+}
+u.encode = function(a) {
+  if (this.cache && a.length <= this.B) {
     if (this.L) {
       if (this.H.has(a)) {
         return this.H.get(a);
@@ -171,8 +223,8 @@ K.prototype.encode = function(a) {
   this.numeric && 3 < a.length && (a = a.replace(ha, "$1 $2").replace(ia, "$1 $2").replace(fa, "$1 "));
   const b = !(this.dedupe || this.mapper || this.filter || this.matcher || this.stemmer || this.replacer);
   let c = [], d = this.split || "" === this.split ? a.split(this.split) : a;
-  for (let f = 0, g, h; f < d.length; f++) {
-    if (!(g = h = d[f])) {
+  for (let f = 0, g, k; f < d.length; f++) {
+    if (!(g = k = d[f])) {
       continue;
     }
     if (g.length < this.minlength) {
@@ -185,9 +237,9 @@ K.prototype.encode = function(a) {
     if (this.filter && this.filter.has(g)) {
       continue;
     }
-    if (this.cache && g.length <= this.A) {
+    if (this.cache && g.length <= this.M) {
       if (this.L) {
-        var e = this.J.get(g);
+        var e = this.I.get(g);
         if (e || "" === e) {
           e && c.push(e);
           continue;
@@ -196,33 +248,33 @@ K.prototype.encode = function(a) {
         this.L = setTimeout(ka, 50, this);
       }
     }
-    let k;
-    this.stemmer && 2 < g.length && (this.P || (this.P = new RegExp("(?!^)(" + this.M + ")$")), g = g.replace(this.P, l => this.stemmer.get(l)), k = 1);
-    g && k && (g.length < this.minlength || this.filter && this.filter.has(g)) && (g = "");
+    let h;
+    this.stemmer && 2 < g.length && (this.O || (this.O = new RegExp("(?!^)(" + this.A + ")$")), g = g.replace(this.O, l => this.stemmer.get(l)), h = 1);
+    g && h && (g.length < this.minlength || this.filter && this.filter.has(g)) && (g = "");
     if (g && (this.mapper || this.dedupe && 1 < g.length)) {
       e = "";
-      for (let l = 0, m = "", p, n; l < g.length; l++) {
-        p = g.charAt(l), p === m && this.dedupe || ((n = this.mapper && this.mapper.get(p)) || "" === n ? n === m && this.dedupe || !(m = n) || (e += n) : e += m = p);
+      for (let l = 0, m = "", q, n; l < g.length; l++) {
+        q = g.charAt(l), q === m && this.dedupe || ((n = this.mapper && this.mapper.get(q)) || "" === n ? n === m && this.dedupe || !(m = n) || (e += n) : e += m = q);
       }
       g = e;
     }
-    this.matcher && 1 < g.length && (this.O || (this.O = new RegExp("(" + this.B + ")", "g")), g = g.replace(this.O, l => this.matcher.get(l)));
+    this.matcher && 1 < g.length && (this.N || (this.N = new RegExp("(" + this.h + ")", "g")), g = g.replace(this.N, l => this.matcher.get(l)));
     if (g && this.replacer) {
       for (e = 0; g && e < this.replacer.length; e += 2) {
         g = g.replace(this.replacer[e], this.replacer[e + 1]);
       }
     }
-    this.cache && h.length <= this.A && (this.J.set(h, g), this.J.size > this.S && (this.J.clear(), this.A = this.A / 1.1 | 0));
+    this.cache && k.length <= this.M && (this.I.set(k, g), this.I.size > this.S && (this.I.clear(), this.M = this.M / 1.1 | 0));
     g && c.push(g);
   }
   this.finalize && (c = this.finalize(c) || c);
-  this.cache && a.length <= this.h && (this.H.set(a, c), this.H.size > this.S && (this.H.clear(), this.h = this.h / 1.1 | 0));
+  this.cache && a.length <= this.B && (this.H.set(a, c), this.H.size > this.S && (this.H.clear(), this.B = this.B / 1.1 | 0));
   return c;
 };
 function ka(a) {
   a.L = null;
   a.H.clear();
-  a.J.clear();
+  a.I.clear();
 }
 ;async function la(a) {
   a = a.data;
@@ -232,32 +284,31 @@ function ka(a) {
   switch(d) {
     case "init":
       d = a.options || {};
-      (b = d.config) && (d = b);
-      (b = a.factory) ? (Function("return " + b)()(self), self._index = new self.FlexSearch.Index(d), delete self.FlexSearch) : self._index = new L(d);
+      (b = a.factory) ? (Function("return " + b)()(self), self._index = new self.FlexSearch.Index(d), delete self.FlexSearch) : self._index = new M(d);
       postMessage({id:a.id});
       break;
     default:
       a = a.id, b = b[d].apply(b, c), postMessage("search" === d ? {id:a, msg:b} : {id:a});
   }
 }
-;let M = 0;
+;let ma = 0;
 function N(a = {}) {
   function b(g) {
-    function h(k) {
-      k = k.data || k;
-      const l = k.id, m = l && e.h[l];
-      m && (m(k.msg), delete e.h[l]);
+    function k(h) {
+      h = h.data || h;
+      const l = h.id, m = l && e.h[l];
+      m && (m(h.msg), delete e.h[l]);
     }
     this.worker = g;
-    this.h = B();
+    this.h = C();
     if (this.worker) {
-      d ? this.worker.on("message", h) : this.worker.onmessage = h;
+      d ? this.worker.on("message", k) : this.worker.onmessage = k;
       if (a.config) {
-        return new Promise(function(k) {
-          e.h[++M] = function() {
-            k(e);
+        return new Promise(function(h) {
+          e.h[++ma] = function() {
+            h(e);
           };
-          e.worker.postMessage({id:M, task:"init", factory:c, options:a});
+          e.worker.postMessage({id:ma, task:"init", factory:c, options:a});
         });
       }
       this.worker.postMessage({task:"init", factory:c, options:a});
@@ -269,7 +320,7 @@ function N(a = {}) {
   }
   let c = "undefined" !== typeof self ? self._factory : "undefined" !== typeof window ? window._factory : null;
   c && (c = c.toString());
-  const d = "undefined" === typeof window, e = this, f = ma(c, d, a.worker);
+  const d = "undefined" === typeof window, e = this, f = na(c, d, a.worker);
   return f.then ? f.then(function(g) {
     return b.call(e, g);
   }) : b.call(this, f);
@@ -286,17 +337,17 @@ function O(a) {
     let e;
     "function" === typeof d && (e = d, c.splice(c.length - 1, 1));
     d = new Promise(function(f) {
-      b.h[++M] = f;
-      b.worker.postMessage({task:a, id:M, args:c});
+      b.h[++ma] = f;
+      b.worker.postMessage({task:a, id:ma, args:c});
     });
     return e ? (d.then(e), this) : d;
   };
 }
-function ma(a, b, c) {
+function na(a, b, c) {
   return b ? "undefined" !== typeof module ? new (require("worker_threads")["Worker"])(__dirname + "/node/node.js") : import("worker_threads").then(function(worker){ return new worker["Worker"]((1,eval)("import.meta.dirname") + "/node/node.mjs"); }) : a ? new window.Worker(URL.createObjectURL(new Blob(["onmessage=" + la.toString()], {type:"text/javascript"}))) : new window.Worker(G(c) ? c : (0,eval)("import.meta.url").replace("/worker.js", "/worker/worker.js").replace("flexsearch.bundle.module.min.js", 
   "module/worker/worker.js"), {type:"module"});
 }
-;function na(a) {
+;function oa(a) {
   P.call(a, "add");
   P.call(a, "append");
   P.call(a, "search");
@@ -314,7 +365,7 @@ function P(a) {
     return b;
   };
 }
-;function oa(a, b = 0) {
+;function pa(a, b = 0) {
   let c = [], d = [];
   b && (b = 250000 / b * 5000 | 0);
   for (const e of a.entries()) {
@@ -323,30 +374,30 @@ function P(a) {
   d.length && c.push(d);
   return c;
 }
-function pa(a, b) {
+function qa(a, b) {
   b || (b = new Map());
   for (let c = 0, d; c < a.length; c++) {
     d = a[c], b.set(d[0], d[1]);
   }
   return b;
 }
-function qa(a, b = 0) {
+function ra(a, b = 0) {
   let c = [], d = [];
   b && (b = 250000 / b * 1000 | 0);
   for (const e of a.entries()) {
-    d.push([e[0], oa(e[1])[0]]), d.length === b && (c.push(d), d = []);
+    d.push([e[0], pa(e[1])[0]]), d.length === b && (c.push(d), d = []);
   }
   d.length && c.push(d);
   return c;
 }
-function ra(a, b) {
+function sa(a, b) {
   b || (b = new Map());
   for (let c = 0, d, e; c < a.length; c++) {
-    d = a[c], e = b.get(d[0]), b.set(d[0], pa(d[1], e));
+    d = a[c], e = b.get(d[0]), b.set(d[0], qa(d[1], e));
   }
   return b;
 }
-function sa(a) {
+function ta(a) {
   let b = [], c = [];
   for (const d of a.keys()) {
     c.push(d), 250000 === c.length && (b.push(c), c = []);
@@ -354,36 +405,36 @@ function sa(a) {
   c.length && b.push(c);
   return b;
 }
-function ta(a, b) {
+function ua(a, b) {
   b || (b = new Set());
   for (let c = 0; c < a.length; c++) {
     b.add(a[c]);
   }
   return b;
 }
-function ua(a, b, c, d, e, f, g = 0) {
-  const h = d && d.constructor === Array;
-  var k = h ? d.shift() : d;
-  if (!k) {
+function va(a, b, c, d, e, f, g = 0) {
+  const k = d && d.constructor === Array;
+  var h = k ? d.shift() : d;
+  if (!h) {
     return this.export(a, b, e, f + 1);
   }
-  if ((k = a((b ? b + "." : "") + (g + 1) + "." + c, JSON.stringify(k))) && k.then) {
+  if ((h = a((b ? b + "." : "") + (g + 1) + "." + c, JSON.stringify(h))) && h.then) {
     const l = this;
-    return k.then(function() {
-      return ua.call(l, a, b, c, h ? d : null, e, f, g + 1);
+    return h.then(function() {
+      return va.call(l, a, b, c, k ? d : null, e, f, g + 1);
     });
   }
-  return ua.call(this, a, b, c, h ? d : null, e, f, g + 1);
+  return va.call(this, a, b, c, k ? d : null, e, f, g + 1);
 }
-;function va(a, b, c, d) {
+;function wa(a, b, c, d) {
   let e = [];
   for (let f = 0, g; f < a.index.length; f++) {
     if (g = a.index[f], b >= g.length) {
       b -= g.length;
     } else {
       b = g[d ? "splice" : "slice"](b, c);
-      const h = b.length;
-      if (h && (e = e.length ? e.concat(b) : b, c -= h, d && (a.length -= h), !c)) {
+      const k = b.length;
+      if (k && (e = e.length ? e.concat(b) : b, c -= k, d && (a.length -= k), !c)) {
         break;
       }
       b = 0;
@@ -418,13 +469,13 @@ function Q(a) {
     if ("indexOf" === d) {
       return function(e) {
         let f = 0;
-        for (let g = 0, h, k; g < b.index.length; g++) {
-          h = b.index[g];
-          k = h.indexOf(e);
-          if (0 <= k) {
-            return f + k;
+        for (let g = 0, k, h; g < b.index.length; g++) {
+          k = b.index[g];
+          h = k.indexOf(e);
+          if (0 <= h) {
+            return f + h;
           }
-          f += h.length;
+          f += k.length;
         }
         return -1;
       };
@@ -441,12 +492,12 @@ function Q(a) {
     }
     if ("slice" === d) {
       return function(e, f) {
-        return va(b, e || 0, f || b.length, !1);
+        return wa(b, e || 0, f || b.length, !1);
       };
     }
     if ("splice" === d) {
       return function(e, f) {
-        return va(b, e || 0, f || b.length, !0);
+        return wa(b, e || 0, f || b.length, !0);
       };
     }
     if ("constructor" === d) {
@@ -474,10 +525,10 @@ function R(a = 8) {
   if (!this) {
     return new R(a);
   }
-  this.index = B();
+  this.index = C();
   this.B = [];
   this.size = 0;
-  32 < a ? (this.h = wa, this.A = BigInt(a)) : (this.h = xa, this.A = a);
+  32 < a ? (this.h = xa, this.A = BigInt(a)) : (this.h = ya, this.A = a);
 }
 R.prototype.get = function(a) {
   const b = this.index[this.h(a)];
@@ -492,51 +543,51 @@ function S(a = 8) {
   if (!this) {
     return new S(a);
   }
-  this.index = B();
+  this.index = C();
   this.h = [];
-  32 < a ? (this.B = wa, this.A = BigInt(a)) : (this.B = xa, this.A = a);
+  32 < a ? (this.B = xa, this.A = BigInt(a)) : (this.B = ya, this.A = a);
 }
 S.prototype.add = function(a) {
   var b = this.B(a);
   let c = this.index[b];
   c ? (b = c.size, c.add(a), (b -= c.size) && this.size++) : (this.index[b] = c = new Set([a]), this.h.push(c));
 };
-v = R.prototype;
-v.has = S.prototype.has = function(a) {
+u = R.prototype;
+u.has = S.prototype.has = function(a) {
   const b = this.index[this.B(a)];
   return b && b.has(a);
 };
-v.delete = S.prototype.delete = function(a) {
+u.delete = S.prototype.delete = function(a) {
   const b = this.index[this.B(a)];
   b && b.delete(a) && this.size--;
 };
-v.clear = S.prototype.clear = function() {
-  this.index = B();
+u.clear = S.prototype.clear = function() {
+  this.index = C();
   this.h = [];
   this.size = 0;
 };
-v.values = S.prototype.values = function*() {
+u.values = S.prototype.values = function*() {
   for (let a = 0; a < this.h.length; a++) {
     for (let b of this.h[a].values()) {
       yield b;
     }
   }
 };
-v.keys = S.prototype.keys = function*() {
+u.keys = S.prototype.keys = function*() {
   for (let a = 0; a < this.h.length; a++) {
     for (let b of this.h[a].keys()) {
       yield b;
     }
   }
 };
-v.entries = S.prototype.entries = function*() {
+u.entries = S.prototype.entries = function*() {
   for (let a = 0; a < this.h.length; a++) {
     for (let b of this.h[a].entries()) {
       yield b;
     }
   }
 };
-function xa(a) {
+function ya(a) {
   let b = 2 ** this.A - 1;
   if ("number" == typeof a) {
     return a & b;
@@ -547,7 +598,7 @@ function xa(a) {
   }
   return 32 === this.A ? c + 2 ** 31 : c;
 }
-function wa(a) {
+function xa(a) {
   let b = BigInt(2) ** this.A - BigInt(1);
   var c = typeof a;
   if ("bigint" === c) {
@@ -569,30 +620,30 @@ function wa(a) {
     if (!c && this.reg.has(a)) {
       return this.update(a, b);
     }
-    for (let h = 0, k; h < this.field.length; h++) {
-      k = this.D[h];
-      var d = this.index.get(this.field[h]);
-      if ("function" === typeof k) {
-        var e = k(b);
+    for (let k = 0, h; k < this.field.length; k++) {
+      h = this.D[k];
+      var d = this.index.get(this.field[k]);
+      if ("function" === typeof h) {
+        var e = h(b);
         e && d.add(a, e, !1, !0);
       } else {
-        if (e = k.I, !e || e(b)) {
-          k.constructor === String ? k = ["" + k] : G(k) && (k = [k]), ya(b, k, this.K, 0, d, a, k[0], c);
+        if (e = h.J, !e || e(b)) {
+          h.constructor === String ? h = ["" + h] : G(h) && (h = [h]), za(b, h, this.K, 0, d, a, h[0], c);
         }
       }
     }
     if (this.tag) {
       for (d = 0; d < this.G.length; d++) {
-        var f = this.G[d], g = this.N[d];
+        var f = this.G[d], g = this.P[d];
         e = this.tag.get(g);
-        let h = B();
+        let k = C();
         if ("function" === typeof f) {
           if (f = f(b), !f) {
             continue;
           }
         } else {
-          const k = f.I;
-          if (k && !k(b)) {
+          const h = f.J;
+          if (h && !h(b)) {
             continue;
           }
           f.constructor === String && (f = "" + f);
@@ -600,13 +651,13 @@ function wa(a) {
         }
         if (e && f) {
           G(f) && (f = [f]);
-          for (let k = 0, l, m; k < f.length; k++) {
-            if (l = f[k], !h[l] && (h[l] = 1, (g = e.get(l)) ? m = g : e.set(l, m = []), !c || !m.includes(a))) {
+          for (let h = 0, l, m; h < f.length; h++) {
+            if (l = f[h], !k[l] && (k[l] = 1, (g = e.get(l)) ? m = g : e.set(l, m = []), !c || !m.includes(a))) {
               if (m.length === 2 ** 31 - 1) {
                 g = new Q(m);
                 if (this.fastupdate) {
-                  for (let p of this.reg.values()) {
-                    p.includes(m) && (p[p.indexOf(m)] = g);
+                  for (let q of this.reg.values()) {
+                    q.includes(m) && (q[q.indexOf(m)] = g);
                   }
                 }
                 e.set(l, m = g);
@@ -621,12 +672,12 @@ function wa(a) {
       }
     }
     if (this.store && (!c || !this.store.has(a))) {
-      let h;
+      let k;
       if (this.C) {
-        h = B();
-        for (let k = 0, l; k < this.C.length; k++) {
-          l = this.C[k];
-          if ((c = l.I) && !c(b)) {
+        k = C();
+        for (let h = 0, l; h < this.C.length; h++) {
+          l = this.C[h];
+          if ((c = l.J) && !c(b)) {
             continue;
           }
           let m;
@@ -637,32 +688,32 @@ function wa(a) {
             }
             l = [l.U];
           } else if (G(l) || l.constructor === String) {
-            h[l] = b[l];
+            k[l] = b[l];
             continue;
           }
-          za(b, h, l, 0, l[0], m);
+          Aa(b, k, l, 0, l[0], m);
         }
       }
-      this.store.set(a, h || b);
+      this.store.set(a, k || b);
     }
   }
   return this;
 };
-function za(a, b, c, d, e, f) {
+function Aa(a, b, c, d, e, f) {
   a = a[e];
   if (d === c.length - 1) {
     b[e] = f || a;
   } else if (a) {
     if (a.constructor === Array) {
       for (b = b[e] = Array(a.length), e = 0; e < a.length; e++) {
-        za(a, b, c, d, e);
+        Aa(a, b, c, d, e);
       }
     } else {
-      b = b[e] || (b[e] = B()), e = c[++d], za(a, b, c, d, e);
+      b = b[e] || (b[e] = C()), e = c[++d], Aa(a, b, c, d, e);
     }
   }
 }
-function ya(a, b, c, d, e, f, g, h) {
+function za(a, b, c, d, e, f, g, k) {
   if (a = a[g]) {
     if (d === b.length - 1) {
       if (a.constructor === Array) {
@@ -674,51 +725,51 @@ function ya(a, b, c, d, e, f, g, h) {
         }
         a = a.join(" ");
       }
-      e.add(f, a, h, !0);
+      e.add(f, a, k, !0);
     } else {
       if (a.constructor === Array) {
         for (g = 0; g < a.length; g++) {
-          ya(a, b, c, d, e, f, g, h);
+          za(a, b, c, d, e, f, g, k);
         }
       } else {
-        g = b[++d], ya(a, b, c, d, e, f, g, h);
+        g = b[++d], za(a, b, c, d, e, f, g, k);
       }
     }
   } else {
     e.db && e.remove(f);
   }
 }
-;function Aa(a, b, c, d, e, f, g) {
-  const h = a.length;
-  let k = [], l;
+;function Ba(a, b, c, d, e, f, g) {
+  const k = a.length;
+  let h = [], l;
   var m;
-  l = B();
-  for (let p = 0, n, q, t, r; p < b; p++) {
-    for (let u = 0; u < h; u++) {
-      if (t = a[u], p < t.length && (n = t[p])) {
+  l = C();
+  for (let q = 0, n, p, t, r; q < b; q++) {
+    for (let w = 0; w < k; w++) {
+      if (t = a[w], q < t.length && (n = t[q])) {
         for (let x = 0; x < n.length; x++) {
-          q = n[x], (m = l[q]) ? l[q]++ : (m = 0, l[q] = 1), r = k[m] || (k[m] = []), g || (m = p + (u ? 0 : f || 0), r = r[m] || (r[m] = [])), r.push(q);
+          p = n[x], (m = l[p]) ? l[p]++ : (m = 0, l[p] = 1), r = h[m] || (h[m] = []), g || (m = q + (w ? 0 : f || 0), r = r[m] || (r[m] = [])), r.push(p);
         }
       }
     }
   }
-  if (a = k.length) {
+  if (a = h.length) {
     if (e) {
-      k = 1 < k.length ? Ba(k, d, c, g, 0) : (k = k[0]).length > c || d ? k.slice(d, c + d) : k;
+      h = 1 < h.length ? Ca(h, d, c, g, 0) : (h = h[0]).length > c || d ? h.slice(d, c + d) : h;
     } else {
-      if (a < h) {
+      if (a < k) {
         return [];
       }
-      k = k[a - 1];
+      h = h[a - 1];
       if (c || d) {
         if (g) {
-          if (k.length > c || d) {
-            k = k.slice(d, c + d);
+          if (h.length > c || d) {
+            h = h.slice(d, c + d);
           }
         } else {
           e = [];
-          for (let p = 0, n; p < k.length; p++) {
-            if (n = k[p], n.length > d) {
+          for (let q = 0, n; q < h.length; q++) {
+            if (n = h[q], n.length > d) {
               d -= n.length;
             } else {
               if (n.length > c || d) {
@@ -730,26 +781,26 @@ function ya(a, b, c, d, e, f, g, h) {
               }
             }
           }
-          k = 1 < e.length ? [].concat.apply([], e) : e[0];
+          h = 1 < e.length ? [].concat.apply([], e) : e[0];
         }
       }
     }
   }
-  return k;
+  return h;
 }
-function Ba(a, b, c, d, e) {
-  const f = [], g = B();
-  let h;
-  var k = a.length;
+function Ca(a, b, c, d, e) {
+  const f = [], g = C();
+  let k;
+  var h = a.length;
   let l, m = 0;
   if (d) {
-    for (e = k - 1; 0 <= e; e--) {
-      for (d = a[e], l = d.length, k = 0; k < l; k++) {
-        if (h = d[k], !g[h]) {
-          if (g[h] = 1, b) {
+    for (e = h - 1; 0 <= e; e--) {
+      for (d = a[e], l = d.length, h = 0; h < l; h++) {
+        if (k = d[h], !g[k]) {
+          if (g[k] = 1, b) {
             b--;
           } else {
-            if (f.push(h), f.length === c) {
+            if (f.push(k), f.length === c) {
               return f;
             }
           }
@@ -757,17 +808,17 @@ function Ba(a, b, c, d, e) {
       }
     }
   } else {
-    let p = ca(a);
-    for (let n = 0; n < p; n++) {
-      for (let q = k - 1; 0 <= q; q--) {
-        if (l = (d = a[q][n]) && d.length) {
+    let q = ca(a);
+    for (let n = 0; n < q; n++) {
+      for (let p = h - 1; 0 <= p; p--) {
+        if (l = (d = a[p][n]) && d.length) {
           for (let t = 0; t < l; t++) {
-            if (h = d[t], !g[h]) {
-              if (g[h] = 1, b) {
+            if (k = d[t], !g[k]) {
+              if (g[k] = 1, b) {
                 b--;
               } else {
-                let r = n + (q < k - 1 ? e || 0 : 0);
-                (f[r] || (f[r] = [])).push(h);
+                let r = n + (p < h - 1 ? e || 0 : 0);
+                (f[r] || (f[r] = [])).push(k);
                 if (++m === c) {
                   return f;
                 }
@@ -780,8 +831,8 @@ function Ba(a, b, c, d, e) {
   }
   return f;
 }
-function Ca(a, b) {
-  const c = B(), d = [];
+function Da(a, b) {
+  const c = C(), d = [];
   for (let e = 0, f; e < b.length; e++) {
     f = b[e];
     for (let g = 0; g < f.length; g++) {
@@ -796,48 +847,48 @@ function Ca(a, b) {
 ;T.prototype.search = function(a, b, c, d) {
   c || (!b && H(a) ? (c = a, a = "") : H(b) && (c = b, b = 0));
   let e = [], f = [], g;
-  let h;
   let k;
-  let l, m = 0, p;
+  let h;
+  let l, m = 0, q;
   if (c) {
     c.constructor === Array && (c = {index:c});
     a = c.query || a;
     g = c.pluck;
-    h = c.merge;
-    k = g || c.field || c.index;
+    k = c.merge;
+    h = g || c.field || c.index;
     var n = this.tag && c.tag;
-    var q = this.store && c.enrich;
+    var p = this.store && c.enrich;
     var t = c.suggest;
-    p = c.highlight;
+    q = c.highlight;
     b = c.limit || b;
     l = c.offset || 0;
     b || (b = 100);
     if (n && (!this.db || !d)) {
       n.constructor !== Array && (n = [n]);
       var r = [];
-      for (let y = 0, w; y < n.length; y++) {
-        w = n[y];
-        if (G(w)) {
+      for (let y = 0, v; y < n.length; y++) {
+        v = n[y];
+        if (G(v)) {
           throw Error("A tag option can't be a string, instead it needs a { field: tag } format.");
         }
-        if (w.field && w.tag) {
-          var u = w.tag;
-          if (u.constructor === Array) {
-            for (var x = 0; x < u.length; x++) {
-              r.push(w.field, u[x]);
+        if (v.field && v.tag) {
+          var w = v.tag;
+          if (w.constructor === Array) {
+            for (var x = 0; x < w.length; x++) {
+              r.push(v.field, w[x]);
             }
           } else {
-            r.push(w.field, u);
+            r.push(v.field, w);
           }
         } else {
-          u = Object.keys(w);
-          for (let A = 0, I, C; A < u.length; A++) {
-            if (I = u[A], C = w[I], C.constructor === Array) {
-              for (x = 0; x < C.length; x++) {
-                r.push(I, C[x]);
+          w = Object.keys(v);
+          for (let A = 0, I, D; A < w.length; A++) {
+            if (I = w[A], D = v[I], D.constructor === Array) {
+              for (x = 0; x < D.length; x++) {
+                r.push(I, D[x]);
               }
             } else {
-              r.push(I, C);
+              r.push(I, D);
             }
           }
         }
@@ -856,61 +907,61 @@ function Ca(a, b) {
                 console.warn("Tag '" + r[n] + ":" + r[n + 1] + "' will be skipped because there is no field '" + r[n] + "'.");
                 continue;
               }
-              t.push(d = d.db.tag(r[n + 1], b, l, q));
+              t.push(d = d.db.tag(r[n + 1], b, l, p));
             } else {
-              d = Da.call(this, r[n], r[n + 1], b, l, q);
+              d = Ea.call(this, r[n], r[n + 1], b, l, p);
             }
             e.push({field:r[n], tag:r[n + 1], result:d});
           }
         }
         return t.length ? Promise.all(t).then(function(y) {
-          for (let w = 0; w < y.length; w++) {
-            e[w].result = y[w];
+          for (let v = 0; v < y.length; v++) {
+            e[v].result = y[v];
           }
           return e;
         }) : e;
       }
     }
-    G(k) && (k = [k]);
+    G(h) && (h = [h]);
   }
-  k || (k = this.field);
+  h || (h = this.field);
   r = !d && (this.worker || this.db) && [];
-  let D;
-  for (let y = 0, w, A, I; y < k.length; y++) {
-    A = k[y];
+  let B;
+  for (let y = 0, v, A, I; y < h.length; y++) {
+    A = h[y];
     if (this.db && this.tag && !this.D[y]) {
       continue;
     }
-    let C;
-    G(A) || (C = A, A = C.field, a = C.query || a, b = C.limit || b, l = C.offset || l, t = C.suggest || t, q = this.store && (C.enrich || q));
+    let D;
+    G(A) || (D = A, A = D.field, a = D.query || a, b = D.limit || b, l = D.offset || l, t = D.suggest || t, p = this.store && (D.enrich || p));
     if (d) {
-      w = d[y];
+      v = d[y];
     } else {
-      if (u = C || c, x = this.index.get(A), n && (this.db && (u.tag = n, D = x.db.support_tag_search, u.field = k), D || (u.enrich = !1)), r) {
-        r[y] = x.search(a, b, u);
-        u && q && (u.enrich = q);
+      if (w = D || c, x = this.index.get(A), n && (this.db && (w.tag = n, B = x.db.support_tag_search, w.field = h), B || (w.enrich = !1)), r) {
+        r[y] = x.search(a, b, w);
+        w && p && (w.enrich = p);
         continue;
       } else {
-        w = x.search(a, b, u), u && q && (u.enrich = q);
+        v = x.search(a, b, w), w && p && (w.enrich = p);
       }
     }
-    I = w && w.length;
+    I = v && v.length;
     if (n && I) {
-      u = [];
+      w = [];
       x = 0;
       if (this.db && d) {
-        if (!D) {
-          for (let E = k.length; E < d.length; E++) {
+        if (!B) {
+          for (let E = h.length; E < d.length; E++) {
             let F = d[E];
             if (F && F.length) {
-              x++, u.push(F);
+              x++, w.push(F);
             } else if (!t) {
               return e;
             }
           }
         }
       } else {
-        for (let E = 0, F, ib; E < n.length; E += 2) {
+        for (let E = 0, F, jb; E < n.length; E += 2) {
           F = this.tag.get(n[E]);
           if (!F) {
             if (console.warn("Tag '" + n[E] + ":" + n[E + 1] + "' will be skipped because there is no field '" + n[E] + "'."), t) {
@@ -919,16 +970,16 @@ function Ca(a, b) {
               return e;
             }
           }
-          if (ib = (F = F && F.get(n[E + 1])) && F.length) {
-            x++, u.push(F);
+          if (jb = (F = F && F.get(n[E + 1])) && F.length) {
+            x++, w.push(F);
           } else if (!t) {
             return e;
           }
         }
       }
       if (x) {
-        w = Ca(w, u);
-        I = w.length;
+        v = Da(v, w);
+        I = v.length;
         if (!I && !t) {
           return e;
         }
@@ -936,84 +987,84 @@ function Ca(a, b) {
       }
     }
     if (I) {
-      f[m] = A, e.push(w), m++;
-    } else if (1 === k.length) {
+      f[m] = A, e.push(v), m++;
+    } else if (1 === h.length) {
       return e;
     }
   }
   if (r) {
-    if (this.db && n && n.length && !D) {
-      for (q = 0; q < n.length; q += 2) {
-        d = this.index.get(n[q]);
+    if (this.db && n && n.length && !B) {
+      for (p = 0; p < n.length; p += 2) {
+        d = this.index.get(n[p]);
         if (!d) {
-          if (console.warn("Tag '" + n[q] + ":" + n[q + 1] + "' was not found because there is no field '" + n[q] + "'."), t) {
+          if (console.warn("Tag '" + n[p] + ":" + n[p + 1] + "' was not found because there is no field '" + n[p] + "'."), t) {
             continue;
           } else {
             return e;
           }
         }
-        r.push(d.db.tag(n[q + 1], b, l, !1));
+        r.push(d.db.tag(n[p + 1], b, l, !1));
       }
     }
     const y = this;
-    return Promise.all(r).then(function(w) {
-      return w.length ? y.search(a, b, c, w) : w;
+    return Promise.all(r).then(function(v) {
+      return v.length ? y.search(a, b, c, v) : v;
     });
   }
   if (!m) {
     return e;
   }
-  if (g && (!q || !this.store)) {
+  if (g && (!p || !this.store)) {
     return e[0];
   }
   r = [];
-  for (let y = 0, w; y < f.length; y++) {
-    w = e[y];
-    q && w.length && !w[0].doc && (this.db ? r.push(w = this.index.get(this.field[0]).db.enrich(w)) : w.length && (w = Ea.call(this, w)));
+  for (let y = 0, v; y < f.length; y++) {
+    v = e[y];
+    p && v.length && !v[0].doc && (this.db ? r.push(v = this.index.get(this.field[0]).db.enrich(v)) : v.length && (v = Fa.call(this, v)));
     if (g) {
-      return w;
+      return v;
     }
-    e[y] = {field:f[y], result:w};
+    e[y] = {field:f[y], result:v};
   }
-  if (q && this.db && r.length) {
+  if (p && this.db && r.length) {
     const y = this;
-    return Promise.all(r).then(function(w) {
-      for (let A = 0; A < w.length; A++) {
-        e[A].result = w[A];
+    return Promise.all(r).then(function(v) {
+      for (let A = 0; A < v.length; A++) {
+        e[A].result = v[A];
       }
-      return h ? Fa(e, b) : p ? Ga(e, a, y.index, y.field, y.D, p) : e;
+      return k ? Ga(e, b) : q ? Ha(e, a, y.index, y.field, y.D, q) : e;
     });
   }
-  return h ? Fa(e, b) : p ? Ga(e, a, this.index, this.field, this.D, p) : e;
+  return k ? Ga(e, b) : q ? Ha(e, a, this.index, this.field, this.D, q) : e;
 };
-function Ga(a, b, c, d, e, f) {
-  let g, h, k;
-  for (let m = 0, p, n, q, t, r; m < a.length; m++) {
-    p = a[m].result;
+function Ha(a, b, c, d, e, f) {
+  let g, k, h;
+  for (let m = 0, q, n, p, t, r; m < a.length; m++) {
+    q = a[m].result;
     n = a[m].field;
     t = c.get(n);
-    q = t.encoder;
-    k = t.tokenize;
+    p = t.encoder;
+    h = t.tokenize;
     r = e[d.indexOf(n)];
-    q !== g && (g = q, h = g.encode(b));
-    for (let u = 0; u < p.length; u++) {
+    p !== g && (g = p, k = g.encode(b));
+    for (let w = 0; w < q.length; w++) {
       let x = "";
-      var l = J(p[u].doc, r);
-      let D = g.encode(l);
+      var l = J(q[w].doc, r);
+      let B = g.encode(l);
       l = l.split(g.split);
-      for (let y = 0, w, A; y < D.length; y++) {
-        w = D[y];
+      for (let y = 0, v, A; y < B.length; y++) {
+        v = B[y];
         A = l[y];
         let I;
-        for (let C = 0, E; C < h.length; C++) {
-          if (E = h[C], "strict" === k) {
-            if (w === E) {
+        for (let D = 0, E; D < k.length; D++) {
+          if (E = k[D], "strict" === h) {
+            if (v === E) {
               x += (x ? " " : "") + f.replace("$1", A);
               I = !0;
               break;
             }
           } else {
-            const F = w.indexOf(E);
+            const F = v.indexOf(E);
             if (-1 < F) {
               x += (x ? " " : "") + A.substring(0, F) + f.replace("$1", A.substring(F, E.length)) + A.substring(F + E.length);
               I = !0;
@@ -1023,31 +1074,31 @@ function Ga(a, b, c, d, e, f) {
         }
         I || (x += (x ? " " : "") + l[y]);
       }
-      p[u].highlight = x;
+      q[w].highlight = x;
     }
   }
   return a;
 }
-function Fa(a, b) {
-  const c = [], d = B();
+function Ga(a, b) {
+  const c = [], d = C();
   for (let e = 0, f, g; e < a.length; e++) {
     f = a[e];
     g = f.result;
-    for (let h = 0, k, l, m; h < g.length; h++) {
-      if (l = g[h], k = l.id, m = d[k]) {
+    for (let k = 0, h, l, m; k < g.length; k++) {
+      if (l = g[k], h = l.id, m = d[h]) {
         m.push(f.field);
       } else {
         if (c.length === b) {
           return c;
         }
-        l.field = d[k] = [f.field];
+        l.field = d[h] = [f.field];
         c.push(l);
       }
     }
   }
   return c;
 }
-function Da(a, b, c, d, e) {
+function Ea(a, b, c, d, e) {
   let f = this.tag.get(a);
   if (!f) {
     return console.warn("Tag '" + a + "' was not found"), [];
@@ -1056,11 +1107,11 @@ function Da(a, b, c, d, e) {
     if (a > c || d) {
       f = f.slice(d, d + c);
     }
-    e && (f = Ea.call(this, f));
+    e && (f = Fa.call(this, f));
     return f;
   }
 }
-function Ea(a) {
+function Fa(a) {
   const b = Array(a.length);
   for (let c = 0, d; c < a.length; c++) {
     d = a[c], b[c] = {id:d, doc:this.store.get(d)};
@@ -1076,29 +1127,29 @@ function Ea(a) {
   this.D = [];
   this.field = [];
   this.K = [];
-  this.key = (c = b.key || b.id) && Ha(c, this.K) || "id";
+  this.key = (c = b.key || b.id) && Ia(c, this.K) || "id";
   (d = a.keystore || 0) && (this.keystore = d);
   this.reg = (this.fastupdate = !!a.fastupdate) ? d ? new R(d) : new Map() : d ? new S(d) : new Set();
-  this.C = (c = b.store || null) && !0 !== c && [];
+  this.C = (c = b.store || null) && c && !0 !== c && [];
   this.store = c && (d ? new R(d) : new Map());
   this.cache = (c = a.cache || null) && new U(c);
   a.cache = !1;
   this.worker = a.worker;
-  this.index = Ia.call(this, a, b);
+  this.index = Ja.call(this, a, b);
   this.tag = null;
   if (c = b.tag) {
     if ("string" === typeof c && (c = [c]), c.length) {
       this.tag = new Map();
       this.G = [];
-      this.N = [];
+      this.P = [];
       for (let e = 0, f, g; e < c.length; e++) {
         f = c[e];
         g = f.field || f;
         if (!g) {
           throw Error("The tag field from the document descriptor is undefined.");
         }
-        f.custom ? this.G[e] = f.custom : (this.G[e] = Ha(g, this.K), f.filter && ("string" === typeof this.G[e] && (this.G[e] = new String(this.G[e])), this.G[e].I = f.filter));
-        this.N[e] = g;
+        f.custom ? this.G[e] = f.custom : (this.G[e] = Ia(g, this.K), f.filter && ("string" === typeof this.G[e] && (this.G[e] = new String(this.G[e])), this.G[e].J = f.filter));
+        this.P[e] = g;
         this.tag.set(g, new Map());
       }
     }
@@ -1112,9 +1163,9 @@ function Ea(a) {
       const e = this;
       return Promise.all(a).then(function(f) {
         let g = 0;
-        for (const h of e.index.entries()) {
-          const k = h[0];
-          h[1].then && e.index.set(k, f[g++]);
+        for (const k of e.index.entries()) {
+          const h = k[0];
+          k[1].then && e.index.set(h, f[g++]);
         }
         return e;
       });
@@ -1123,14 +1174,14 @@ function Ea(a) {
     a.db && this.mount(a.db);
   }
 }
-v = T.prototype;
-v.mount = function(a) {
+u = T.prototype;
+u.mount = function(a) {
   let b = this.field;
   if (this.tag) {
-    for (let e = 0, f; e < this.N.length; e++) {
-      f = this.N[e];
+    for (let e = 0, f; e < this.P.length; e++) {
+      f = this.P[e];
       var c = void 0;
-      this.index.set(f, c = new L({}, this.reg));
+      this.index.set(f, c = new M({}, this.reg));
       b === this.field && (b = b.slice(0));
       b.push(f);
       c.tag = this.tag.get(f);
@@ -1141,16 +1192,16 @@ v.mount = function(a) {
   for (let e = 0, f, g; e < b.length; e++) {
     d.field = g = b[e];
     f = this.index.get(g);
-    const h = new a.constructor(a.id, d);
-    h.id = a.id;
-    c[e] = h.mount(f);
+    const k = new a.constructor(a.id, d);
+    k.id = a.id;
+    c[e] = k.mount(f);
     f.document = !0;
     e ? f.bypass = !0 : f.store = this.store;
   }
   this.db = !0;
   return Promise.all(c);
 };
-v.commit = async function(a, b) {
+u.commit = async function(a, b) {
   const c = [];
   for (const d of this.index.values()) {
     c.push(d.db.commit(d, a, b));
@@ -1158,14 +1209,14 @@ v.commit = async function(a, b) {
   await Promise.all(c);
   this.reg.clear();
 };
-v.destroy = function() {
+u.destroy = function() {
   const a = [];
   for (const b of this.index.values()) {
     a.push(b.destroy());
   }
   return Promise.all(a);
 };
-function Ia(a, b) {
+function Ja(a, b) {
   const c = new Map();
   let d = b.index || b.field || b;
   G(d) && (d = [d]);
@@ -1174,23 +1225,23 @@ function Ia(a, b) {
     G(f) || (g = f, f = f.field);
     g = H(g) ? Object.assign({}, a, g) : a;
     if (this.worker) {
-      const h = new N(g);
-      c.set(f, h);
+      const k = new N(g);
+      c.set(f, k);
     }
-    this.worker || c.set(f, new L(g, this.reg));
-    g.custom ? this.D[e] = g.custom : (this.D[e] = Ha(f, this.K), g.filter && ("string" === typeof this.D[e] && (this.D[e] = new String(this.D[e])), this.D[e].I = g.filter));
+    this.worker || c.set(f, new M(g, this.reg));
+    g.custom ? this.D[e] = g.custom : (this.D[e] = Ia(f, this.K), g.filter && ("string" === typeof this.D[e] && (this.D[e] = new String(this.D[e])), this.D[e].J = g.filter));
     this.field[e] = f;
   }
   if (this.C) {
     a = b.store;
     G(a) && (a = [a]);
     for (let e = 0, f, g; e < a.length; e++) {
-      f = a[e], g = f.field || f, f.custom ? (this.C[e] = f.custom, f.custom.U = g) : (this.C[e] = Ha(g, this.K), f.filter && ("string" === typeof this.C[e] && (this.C[e] = new String(this.C[e])), this.C[e].I = f.filter));
+      f = a[e], g = f.field || f, f.custom ? (this.C[e] = f.custom, f.custom.U = g) : (this.C[e] = Ia(g, this.K), f.filter && ("string" === typeof this.C[e] && (this.C[e] = new String(this.C[e])), this.C[e].J = f.filter));
     }
   }
   return c;
 }
-function Ha(a, b) {
+function Ia(a, b) {
   const c = a.split(":");
   let d = 0;
   for (let e = 0; e < c.length; e++) {
@@ -1199,13 +1250,13 @@ function Ha(a, b) {
   d < c.length && (c.length = d);
   return 1 < d ? c : c[0];
 }
-v.append = function(a, b) {
+u.append = function(a, b) {
   return this.add(a, b, !0);
 };
-v.update = function(a, b) {
+u.update = function(a, b) {
   return this.remove(a).add(a, b);
 };
-v.remove = function(a) {
+u.remove = function(a) {
   H(a) && (a = J(a, this.key));
   for (var b of this.index.values()) {
     b.remove(a, !0);
@@ -1226,7 +1277,7 @@ v.remove = function(a) {
   this.cache && this.cache.remove(a);
   return this;
 };
-v.clear = function() {
+u.clear = function() {
   for (const a of this.index.values()) {
     a.clear();
   }
@@ -1238,32 +1289,32 @@ v.clear = function() {
   this.store && this.store.clear();
   return this;
 };
-v.contain = function(a) {
+u.contain = function(a) {
   return this.db ? this.index.get(this.field[0]).db.has(a) : this.reg.has(a);
 };
-v.cleanup = function() {
+u.cleanup = function() {
   for (const a of this.index.values()) {
     a.cleanup();
   }
   return this;
 };
-v.get = function(a) {
+u.get = function(a) {
   return this.db ? this.index.get(this.field[0]).db.enrich(a).then(function(b) {
     return b[0] && b[0].doc;
   }) : this.store.get(a);
 };
-v.set = function(a, b) {
+u.set = function(a, b) {
   this.store.set(a, b);
   return this;
 };
-v.searchCache = Ja;
-v.export = function(a, b, c = 0, d = 0) {
+u.searchCache = Ka;
+u.export = function(a, b, c = 0, d = 0) {
   if (c < this.field.length) {
     const g = this.field[c];
     if ((b = this.index.get(g).export(a, g, c, d = 1)) && b.then) {
-      const h = this;
+      const k = this;
       return b.then(function() {
-        return h.export(a, g, c + 1);
+        return k.export(a, g, c + 1);
       });
     }
     return this.export(a, g, c + 1);
@@ -1272,17 +1323,17 @@ v.export = function(a, b, c = 0, d = 0) {
   switch(d) {
     case 0:
       e = "reg";
-      f = sa(this.reg);
+      f = ta(this.reg);
       b = null;
       break;
     case 1:
       e = "tag";
-      f = qa(this.tag, this.reg.size);
+      f = ra(this.tag, this.reg.size);
       b = null;
       break;
     case 2:
       e = "doc";
-      f = oa(this.store);
+      f = pa(this.store);
       b = null;
       break;
     case 3:
@@ -1293,9 +1344,9 @@ v.export = function(a, b, c = 0, d = 0) {
     default:
       return;
   }
-  return ua.call(this, a, b, e, f, c, d);
+  return va.call(this, a, b, e, f, c, d);
 };
-v.import = function(a, b) {
+u.import = function(a, b) {
   if (b) {
     G(b) && (b = JSON.parse(b));
     a = a.split(".");
@@ -1308,21 +1359,21 @@ v.import = function(a, b) {
     switch(a) {
       case "reg":
         this.fastupdate = !1;
-        this.reg = ta(b, this.reg);
+        this.reg = ua(b, this.reg);
         for (let d = 0, e; d < this.field.length; d++) {
           e = this.index.get(this.field[d]), e.fastupdate = !1, e.reg = this.reg;
         }
         break;
       case "tag":
-        this.tag = ra(b, this.tag);
+        this.tag = sa(b, this.tag);
         break;
       case "doc":
-        this.store = pa(b, this.store);
+        this.store = qa(b, this.store);
     }
   }
 };
-na(T.prototype);
-function Ja(a, b, c) {
+oa(T.prototype);
+function Ka(a, b, c) {
   a = ("object" === typeof a ? "" + a.query : a).toLowerCase();
   let d = this.cache.get(a);
   if (!d) {
@@ -1362,78 +1413,78 @@ U.prototype.clear = function() {
   this.cache.clear();
   this.h = "";
 };
-const Ka = {normalize:function(a) {
+const La = {normalize:function(a) {
   return a.toLowerCase();
 }, dedupe:!1};
-const La = new Map([["b", "p"], ["v", "f"], ["w", "f"], ["z", "s"], ["x", "s"], ["d", "t"], ["n", "m"], ["c", "k"], ["g", "k"], ["j", "k"], ["q", "k"], ["i", "e"], ["y", "e"], ["u", "o"]]);
-const Ma = new Map([["ae", "a"], ["oe", "o"], ["sh", "s"], ["kh", "k"], ["th", "t"], ["pf", "f"]]), Na = [/([^aeo])h(.)/g, "$1$2", /([aeo])h([^aeo]|$)/g, "$1$2", /([^0-9])\1+/g, "$1"];
-const Oa = {a:"", e:"", i:"", o:"", u:"", y:"", b:1, f:1, p:1, v:1, c:2, g:2, j:2, k:2, q:2, s:2, x:2, z:2, "\u00df":2, d:3, t:3, l:4, m:5, n:5, r:6};
-const Pa = /[\x00-\x7F]+/g;
+const Ma = new Map([["b", "p"], ["v", "f"], ["w", "f"], ["z", "s"], ["x", "s"], ["d", "t"], ["n", "m"], ["c", "k"], ["g", "k"], ["j", "k"], ["q", "k"], ["i", "e"], ["y", "e"], ["u", "o"]]);
+const Na = new Map([["ae", "a"], ["oe", "o"], ["sh", "s"], ["kh", "k"], ["th", "t"], ["pf", "f"]]), Oa = [/([^aeo])h(.)/g, "$1$2", /([aeo])h([^aeo]|$)/g, "$1$2", /([^0-9])\1+/g, "$1"];
+const Pa = {a:"", e:"", i:"", o:"", u:"", y:"", b:1, f:1, p:1, v:1, c:2, g:2, j:2, k:2, q:2, s:2, x:2, z:2, "\u00df":2, d:3, t:3, l:4, m:5, n:5, r:6};
 const Qa = /[\x00-\x7F]+/g;
 const Ra = /[\x00-\x7F]+/g;
-var Sa = {LatinExact:{normalize:!1, dedupe:!1}, LatinDefault:Ka, LatinSimple:{normalize:!0, dedupe:!0}, LatinBalance:{normalize:!0, dedupe:!0, mapper:La}, LatinAdvanced:{normalize:!0, dedupe:!0, mapper:La, matcher:Ma, replacer:Na}, LatinExtra:{normalize:!0, dedupe:!0, mapper:La, replacer:Na.concat([/(?!^)[aeo]/g, ""]), matcher:Ma}, LatinSoundex:{normalize:!0, dedupe:!1, include:{letter:!0}, finalize:function(a) {
+const Sa = /[\x00-\x7F]+/g;
+var Ta = {LatinExact:{normalize:!1, dedupe:!1}, LatinDefault:La, LatinSimple:{normalize:!0, dedupe:!0}, LatinBalance:{normalize:!0, dedupe:!0, mapper:Ma}, LatinAdvanced:{normalize:!0, dedupe:!0, mapper:Ma, matcher:Na, replacer:Oa}, LatinExtra:{normalize:!0, dedupe:!0, mapper:Ma, replacer:Oa.concat([/(?!^)[aeo]/g, ""]), matcher:Na}, LatinSoundex:{normalize:!0, dedupe:!1, include:{letter:!0}, finalize:function(a) {
   for (let c = 0; c < a.length; c++) {
     var b = a[c];
-    let d = b.charAt(0), e = Oa[d];
-    for (let f = 1, g; f < b.length && (g = b.charAt(f), "h" === g || "w" === g || !(g = Oa[g]) || g === e || (d += g, e = g, 4 !== d.length)); f++) {
+    let d = b.charAt(0), e = Pa[d];
+    for (let f = 1, g; f < b.length && (g = b.charAt(f), "h" === g || "w" === g || !(g = Pa[g]) || g === e || (d += g, e = g, 4 !== d.length)); f++) {
     }
     a[c] = d;
   }
 }}, ArabicDefault:{rtl:!0, normalize:!1, dedupe:!0, prepare:function(a) {
-  return ("" + a).replace(Pa, " ");
+  return ("" + a).replace(Qa, " ");
 }}, CjkDefault:{normalize:!1, dedupe:!0, split:"", prepare:function(a) {
-  return ("" + a).replace(Qa, "");
+  return ("" + a).replace(Ra, "");
 }}, CyrillicDefault:{normalize:!1, dedupe:!0, prepare:function(a) {
-  return ("" + a).replace(Ra, " ");
+  return ("" + a).replace(Sa, " ");
 }}};
-const Ta = {memory:{resolution:1}, performance:{resolution:6, fastupdate:!0, context:{depth:1, resolution:3}}, match:{tokenize:"forward"}, score:{resolution:9, context:{depth:2, resolution:9}}};
-B();
-L.prototype.add = function(a, b, c, d) {
+const Ua = {memory:{resolution:1}, performance:{resolution:6, fastupdate:!0, context:{depth:1, resolution:3}}, match:{tokenize:"forward"}, score:{resolution:9, context:{depth:2, resolution:9}}};
+C();
+M.prototype.add = function(a, b, c, d) {
   if (b && (a || 0 === a)) {
     if (!d && !c && this.reg.has(a)) {
       return this.update(a, b);
     }
     b = this.encoder.encode(b);
     if (d = b.length) {
-      const l = B(), m = B(), p = this.depth, n = this.resolution;
-      for (let q = 0; q < d; q++) {
-        let t = b[this.rtl ? d - 1 - q : q];
+      const l = C(), m = C(), q = this.depth, n = this.resolution;
+      for (let p = 0; p < d; p++) {
+        let t = b[this.rtl ? d - 1 - p : p];
         var e = t.length;
-        if (e && (p || !m[t])) {
-          var f = this.score ? this.score(b, t, q, null, 0) : Ua(n, d, q), g = "";
+        if (e && (q || !m[t])) {
+          var f = this.score ? this.score(b, t, p, null, 0) : Va(n, d, p), g = "";
           switch(this.tokenize) {
             case "full":
               if (2 < e) {
                 for (f = 0; f < e; f++) {
-                  for (var h = e; h > f; h--) {
-                    g = t.substring(f, h);
-                    var k = this.score ? this.score(b, t, q, g, f) : Ua(n, d, q, e, f);
-                    V(this, m, g, k, a, c);
+                  for (var k = e; k > f; k--) {
+                    g = t.substring(f, k);
+                    var h = this.score ? this.score(b, t, p, g, f) : Va(n, d, p, e, f);
+                    V(this, m, g, h, a, c);
                   }
                 }
                 break;
               }
             case "reverse":
               if (1 < e) {
-                for (h = e - 1; 0 < h; h--) {
-                  g = t[h] + g, k = this.score ? this.score(b, t, q, g, h) : Ua(n, d, q, e, h), V(this, m, g, k, a, c);
+                for (k = e - 1; 0 < k; k--) {
+                  g = t[k] + g, h = this.score ? this.score(b, t, p, g, k) : Va(n, d, p, e, k), V(this, m, g, h, a, c);
                 }
                 g = "";
               }
             case "forward":
               if (1 < e) {
-                for (h = 0; h < e; h++) {
-                  g += t[h], V(this, m, g, f, a, c);
+                for (k = 0; k < e; k++) {
+                  g += t[k], V(this, m, g, f, a, c);
                 }
                 break;
               }
             default:
-              if (V(this, m, t, f, a, c), p && 1 < d && q < d - 1) {
-                for (e = B(), g = this.R, f = t, h = Math.min(p + 1, d - q), e[f] = 1, k = 1; k < h; k++) {
-                  if ((t = b[this.rtl ? d - 1 - q - k : q + k]) && !e[t]) {
+              if (V(this, m, t, f, a, c), q && 1 < d && p < d - 1) {
+                for (e = C(), g = this.R, f = t, k = Math.min(q + 1, d - p), e[f] = 1, h = 1; h < k; h++) {
+                  if ((t = b[this.rtl ? d - 1 - p - h : p + h]) && !e[t]) {
                     e[t] = 1;
-                    const r = this.score ? this.score(b, f, q, t, k) : Ua(g + (d / 2 > g ? 0 : 1), d, q, h - 1, k - 1), u = this.bidirectional && t > f;
-                    V(this, l, u ? f : t, r, a, c, u ? t : f);
+                    const r = this.score ? this.score(b, f, p, t, h) : Va(g + (d / 2 > g ? 0 : 1), d, p, k - 1, h - 1), w = this.bidirectional && t > f;
+                    V(this, l, w ? f : t, r, a, c, w ? t : f);
                   }
                 }
               }
@@ -1445,53 +1496,53 @@ L.prototype.add = function(a, b, c, d) {
       b = "";
     }
   }
-  this.db && (b || this.commit_task.push({del:a}), this.T && Va(this));
+  this.db && (b || this.commit_task.push({del:a}), this.T && Wa(this));
   return this;
 };
 function V(a, b, c, d, e, f, g) {
-  let h = g ? a.ctx : a.map, k;
-  if (!b[c] || g && !(k = b[c])[g]) {
-    if (g ? (b = k || (b[c] = B()), b[g] = 1, (k = h.get(g)) ? h = k : h.set(g, h = new Map())) : b[c] = 1, (k = h.get(c)) ? h = k : h.set(c, h = k = []), h = h[d] || (h[d] = []), !f || !h.includes(e)) {
-      if (h.length === 2 ** 31 - 1) {
-        b = new Q(h);
+  let k = g ? a.ctx : a.map, h;
+  if (!b[c] || g && !(h = b[c])[g]) {
+    if (g ? (b = h || (b[c] = C()), b[g] = 1, (h = k.get(g)) ? k = h : k.set(g, k = new Map())) : b[c] = 1, (h = k.get(c)) ? k = h : k.set(c, k = h = []), k = k[d] || (k[d] = []), !f || !k.includes(e)) {
+      if (k.length === 2 ** 31 - 1) {
+        b = new Q(k);
         if (a.fastupdate) {
           for (let l of a.reg.values()) {
-            l.includes(h) && (l[l.indexOf(h)] = b);
+            l.includes(k) && (l[l.indexOf(k)] = b);
           }
         }
-        k[d] = h = b;
+        h[d] = k = b;
       }
-      h.push(e);
-      a.fastupdate && ((d = a.reg.get(e)) ? d.push(h) : a.reg.set(e, [h]));
+      k.push(e);
+      a.fastupdate && ((d = a.reg.get(e)) ? d.push(k) : a.reg.set(e, [k]));
     }
   }
 }
-function Ua(a, b, c, d, e) {
+function Va(a, b, c, d, e) {
   return c && 1 < a ? b + (d || 0) <= a ? c + (e || 0) : (a - 1) / (b + (d || 0)) * (c + (e || 0)) + 1 | 0 : 0;
 }
 ;function W(a, b, c, d) {
   if (1 === a.length) {
-    return a = a[0], a = c || a.length > b ? b ? a.slice(c, c + b) : a.slice(c) : a, d ? Wa(a) : a;
+    return a = a[0], a = c || a.length > b ? b ? a.slice(c, c + b) : a.slice(c) : a, d ? Xa(a) : a;
   }
   let e = [];
-  for (let f = 0, g, h; f < a.length; f++) {
-    if ((g = a[f]) && (h = g.length)) {
+  for (let f = 0, g, k; f < a.length; f++) {
+    if ((g = a[f]) && (k = g.length)) {
       if (c) {
-        if (c >= h) {
-          c -= h;
+        if (c >= k) {
+          c -= k;
           continue;
         }
-        c < h && (g = b ? g.slice(c, c + b) : g.slice(c), h = g.length, c = 0);
+        c < k && (g = b ? g.slice(c, c + b) : g.slice(c), k = g.length, c = 0);
       }
       if (e.length) {
-        h > b && (g = g.slice(0, b), h = g.length), e.push(g);
+        k > b && (g = g.slice(0, b), k = g.length), e.push(g);
       } else {
-        if (h >= b) {
-          return h > b && (g = g.slice(0, b)), d ? Wa(g) : g;
+        if (k >= b) {
+          return k > b && (g = g.slice(0, b)), d ? Xa(g) : g;
         }
         e = [g];
       }
-      b -= h;
+      b -= k;
       if (!b) {
         break;
       }
@@ -1501,9 +1552,9 @@ function Ua(a, b, c, d, e) {
     return e;
   }
   e = 1 < e.length ? [].concat.apply([], e) : e[0];
-  return d ? Wa(e) : e;
+  return d ? Xa(e) : e;
 }
-function Wa(a) {
+function Xa(a) {
   for (let b = 0; b < a.length; b++) {
     a[b] = {score:b, id:a[b]};
   }
@@ -1523,13 +1574,13 @@ function Wa(a) {
   }
   let d = [];
   c = [];
-  let e = 0, f = 0, g, h;
-  for (let k = 0, l; k < b.length; k++) {
-    if (l = b[k]) {
+  let e = 0, f = 0, g, k;
+  for (let h = 0, l; h < b.length; h++) {
+    if (l = b[h]) {
       e = l.limit || 0;
       f = l.offset || 0;
       g = l.enrich;
-      h = l.resolve;
+      k = l.resolve;
       let m;
       if (l.constructor === X) {
         m = l.result;
@@ -1546,26 +1597,26 @@ function Wa(a) {
       } else {
         continue;
       }
-      d[k] = m;
+      d[h] = m;
       m.then && c.push(m);
     }
   }
   if (c.length) {
     return Promise.all(c).then(function() {
       a.result.length && (d = d.concat([a.result]));
-      a.result = Xa(d, e, f, g, h, a.F);
-      return h ? a.result : a;
+      a.result = Ya(d, e, f, g, k, a.F);
+      return k ? a.result : a;
     });
   }
-  d.length && (this.result.length && (d = d.concat([this.result])), this.result = Xa(d, e, f, g, h, this.F));
-  return h ? this.result : this;
+  d.length && (this.result.length && (d = d.concat([this.result])), this.result = Ya(d, e, f, g, k, this.F));
+  return k ? this.result : this;
 };
-function Xa(a, b, c, d, e, f) {
+function Ya(a, b, c, d, e, f) {
   if (!a.length) {
     return a;
   }
   "object" === typeof b && (c = b.offset || 0, d = b.enrich || !1, b = b.limit || 0);
-  return 2 > a.length ? e ? W(a[0], b, c, d) : a[0] : Ba(a, c, b, e, f);
+  return 2 > a.length ? e ? W(a[0], b, c, d) : a[0] : Ca(a, c, b, e, f);
 }
 ;X.prototype.and = function() {
   if (this.result.length) {
@@ -1582,13 +1633,13 @@ function Xa(a, b, c, d, e, f) {
     }
     let d = [];
     a = [];
-    let e = 0, f = 0, g, h;
-    for (let k = 0, l; k < c.length; k++) {
-      if (l = c[k]) {
+    let e = 0, f = 0, g, k;
+    for (let h = 0, l; h < c.length; h++) {
+      if (l = c[h]) {
         e = l.limit || 0;
         f = l.offset || 0;
         g = l.resolve;
-        h = l.suggest;
+        k = l.suggest;
         let m;
         if (l.constructor === X) {
           m = l.result;
@@ -1605,7 +1656,7 @@ function Xa(a, b, c, d, e, f) {
         } else {
           continue;
         }
-        d[k] = m;
+        d[h] = m;
         m.then && a.push(m);
       }
     }
@@ -1615,24 +1666,24 @@ function Xa(a, b, c, d, e, f) {
     if (a.length) {
       return Promise.all(a).then(function() {
         d = [b.result].concat(d);
-        b.result = Ya(d, e, f, g, b.F, h);
+        b.result = Za(d, e, f, g, b.F, k);
         return g ? b.result : b;
       });
     }
     d = [this.result].concat(d);
-    this.result = Ya(d, e, f, g, this.F, h);
+    this.result = Za(d, e, f, g, this.F, k);
     return g ? this.result : this;
   }
   return this;
 };
-function Ya(a, b, c, d, e, f) {
+function Za(a, b, c, d, e, f) {
   if (2 > a.length) {
     return [];
   }
   let g = [];
-  B();
-  let h = ca(a);
-  return h ? Aa(a, h, b, c, f, e, d) : g;
+  C();
+  let k = ca(a);
+  return k ? Ba(a, k, b, c, f, e, d) : g;
 }
 ;X.prototype.xor = function() {
   const a = this;
@@ -1648,13 +1699,13 @@ function Ya(a, b, c, d, e, f) {
   }
   let d = [];
   c = [];
-  let e = 0, f = 0, g, h;
-  for (let k = 0, l; k < b.length; k++) {
-    if (l = b[k]) {
+  let e = 0, f = 0, g, k;
+  for (let h = 0, l; h < b.length; h++) {
+    if (l = b[h]) {
       e = l.limit || 0;
       f = l.offset || 0;
       g = l.enrich;
-      h = l.resolve;
+      k = l.resolve;
       let m;
       if (l.constructor === X) {
         m = l.result;
@@ -1671,21 +1722,21 @@ function Ya(a, b, c, d, e, f) {
       } else {
         continue;
       }
-      d[k] = m;
+      d[h] = m;
       m.then && c.push(m);
     }
   }
   if (c.length) {
     return Promise.all(c).then(function() {
       a.result.length && (d = [a.result].concat(d));
-      a.result = Za(d, e, f, g, !h, a.F);
-      return h ? a.result : a;
+      a.result = $a(d, e, f, g, !k, a.F);
+      return k ? a.result : a;
     });
   }
-  d.length && (this.result.length && (d = [this.result].concat(d)), this.result = Za(d, e, f, g, !h, a.F));
-  return h ? this.result : this;
+  d.length && (this.result.length && (d = [this.result].concat(d)), this.result = $a(d, e, f, g, !k, a.F));
+  return k ? this.result : this;
 };
-function Za(a, b, c, d, e, f) {
+function $a(a, b, c, d, e, f) {
   if (!a.length) {
     return a;
   }
@@ -1693,26 +1744,26 @@ function Za(a, b, c, d, e, f) {
     return e ? W(a[0], b, c, d) : a[0];
   }
   d = [];
-  const g = B();
-  let h = 0;
-  for (let k = 0, l; k < a.length; k++) {
-    if (l = a[k]) {
-      for (let m = 0, p; m < l.length; m++) {
-        if (p = l[m]) {
-          h < p.length && (h = p.length);
-          for (let n = 0, q; n < p.length; n++) {
-            q = p[n], g[q] ? g[q]++ : g[q] = 1;
+  const g = C();
+  let k = 0;
+  for (let h = 0, l; h < a.length; h++) {
+    if (l = a[h]) {
+      for (let m = 0, q; m < l.length; m++) {
+        if (q = l[m]) {
+          k < q.length && (k = q.length);
+          for (let n = 0, p; n < q.length; n++) {
+            p = q[n], g[p] ? g[p]++ : g[p] = 1;
           }
         }
       }
     }
   }
-  for (let k = 0, l, m = 0; k < h; k++) {
-    for (let p = 0, n; p < a.length; p++) {
-      if (n = a[p]) {
-        if (l = n[k]) {
-          for (let q = 0, t; q < l.length; q++) {
-            if (t = l[q], 1 === g[t]) {
+  for (let h = 0, l, m = 0; h < k; h++) {
+    for (let q = 0, n; q < a.length; q++) {
+      if (n = a[q]) {
+        if (l = n[h]) {
+          for (let p = 0, t; p < l.length; p++) {
+            if (t = l[p], 1 === g[t]) {
               if (c) {
                 c--;
               } else {
@@ -1721,7 +1772,7 @@ function Za(a, b, c, d, e, f) {
                     return d;
                   }
                 } else {
-                  const r = k + (p ? f : 0);
+                  const r = h + (q ? f : 0);
                   d[r] || (d[r] = []);
                   d[r].push(t);
                   if (++m === b) {
@@ -1752,50 +1803,50 @@ function Za(a, b, c, d, e, f) {
   let d = [];
   c = [];
   let e = 0, f = 0, g;
-  for (let h = 0, k; h < b.length; h++) {
-    if (k = b[h]) {
-      e = k.limit || 0;
-      f = k.offset || 0;
-      g = k.resolve;
+  for (let k = 0, h; k < b.length; k++) {
+    if (h = b[k]) {
+      e = h.limit || 0;
+      f = h.offset || 0;
+      g = h.resolve;
       let l;
-      if (k.constructor === X) {
-        l = k.result;
-      } else if (k.constructor === Array) {
-        l = k;
-      } else if (k.index) {
-        k.resolve = !1, l = k.index.search(k).result;
-      } else if (k.or) {
-        l = this.or(k.or);
-      } else if (k.and) {
-        l = this.and(k.and);
-      } else if (k.xor) {
-        l = this.xor(k.xor);
+      if (h.constructor === X) {
+        l = h.result;
+      } else if (h.constructor === Array) {
+        l = h;
+      } else if (h.index) {
+        h.resolve = !1, l = h.index.search(h).result;
+      } else if (h.or) {
+        l = this.or(h.or);
+      } else if (h.and) {
+        l = this.and(h.and);
+      } else if (h.xor) {
+        l = this.xor(h.xor);
       } else {
         continue;
       }
-      d[h] = l;
+      d[k] = l;
       l.then && c.push(l);
     }
   }
   if (c.length) {
     return Promise.all(c).then(function() {
-      a.result = $a.call(a, d, e, f, g);
+      a.result = ab.call(a, d, e, f, g);
       return g ? a.result : a;
     });
   }
-  d.length && (this.result = $a.call(this, d, e, f, g));
+  d.length && (this.result = ab.call(this, d, e, f, g));
   return g ? this.result : this;
 };
-function $a(a, b, c, d) {
+function ab(a, b, c, d) {
   if (!a.length) {
     return this.result;
   }
   const e = [];
   a = new Set(a.flat().flat());
-  for (let f = 0, g, h = 0; f < this.result.length; f++) {
+  for (let f = 0, g, k = 0; f < this.result.length; f++) {
     if (g = this.result[f]) {
-      for (let k = 0, l; k < g.length; k++) {
-        if (l = g[k], !a.has(l)) {
+      for (let h = 0, l; h < g.length; h++) {
+        if (l = g[h], !a.has(l)) {
           if (c) {
             c--;
           } else {
@@ -1804,7 +1855,7 @@ function $a(a, b, c, d) {
                 return e;
               }
             } else {
-              if (e[f] || (e[f] = []), e[f].push(l), ++h === b) {
+              if (e[f] || (e[f] = []), e[f].push(l), ++k === b) {
                 return e;
               }
             }
@@ -1861,129 +1912,117 @@ X.prototype.boost = function(a) {
   return this;
 };
 X.prototype.resolve = function(a, b, c) {
-  ab = 1;
+  bb = 1;
   const d = this.result;
   this.result = this.index = null;
   return d.length ? ("object" === typeof a && (c = a.enrich, b = a.offset, a = a.limit), W(d, a || 100, b, c)) : d;
 };
-let ab = 1;
-L.prototype.search = function(a, b, c) {
+let bb = 1;
+M.prototype.search = function(a, b, c) {
   c || (!b && H(a) ? (c = a, a = "") : H(b) && (c = b, b = 0));
-  let d = [], e;
-  let f, g = 0, h, k, l, m;
-  if (c) {
-    a = c.query || a;
-    b = c.limit || b;
-    g = c.offset || 0;
-    var p = c.context;
-    f = c.suggest;
-    (h = ab && !1 !== c.resolve) || (ab = 0);
-    k = h && c.enrich;
-    m = c.boost;
-    l = this.db && c.tag;
-  } else {
-    h = this.resolve || ab;
-  }
-  a = this.encoder.encode(a);
-  e = a.length;
+  let d = [], e, f, g, k = 0, h, l, m, q, n;
+  c ? (a = c.query || a, b = c.limit || b, k = c.offset || 0, f = c.context, g = c.suggest, (h = bb && !1 !== c.resolve) || (bb = 0), l = h && c.enrich, q = c.boost, n = c.resolution, m = this.db && c.tag) : h = this.resolve || bb;
+  let p = this.encoder.encode(a);
+  e = p.length;
   b || !h || (b = 100);
   if (1 === e) {
-    return bb.call(this, a[0], "", b, g, h, k, l);
+    return cb.call(this, p[0], "", b, k, h, l, m);
   }
-  p = this.depth && !1 !== p;
-  if (2 === e && p && !f) {
-    return bb.call(this, a[0], a[1], b, g, h, k, l);
+  f = this.depth && !1 !== f;
+  if (2 === e && f && !g) {
+    return cb.call(this, p[0], p[1], b, k, h, l, m);
   }
-  let n = c = 0;
+  let t = c = 0;
   if (1 < e) {
-    const r = B(), u = [];
-    for (let x = 0, D; x < e; x++) {
-      if ((D = a[x]) && !r[D]) {
-        if (f || this.db || Y(this, D)) {
-          u.push(D), r[D] = 1;
+    const x = C(), B = [];
+    for (let y = 0, v; y < e; y++) {
+      if ((v = p[y]) && !x[v]) {
+        if (g || this.db || Y(this, v)) {
+          B.push(v), x[v] = 1;
         } else {
           return h ? d : new X(d);
         }
-        const y = D.length;
-        c = Math.max(c, y);
-        n = n ? Math.min(n, y) : y;
+        const A = v.length;
+        c = Math.max(c, A);
+        t = t ? Math.min(t, A) : A;
       }
     }
-    a = u;
+    p = B;
     e = a.length;
   }
   if (!e) {
     return h ? d : new X(d);
   }
-  let q = 0, t;
+  let r = 0, w;
   if (1 === e) {
-    return bb.call(this, a[0], "", b, g, h, k, l);
+    return cb.call(this, p[0], "", b, k, h, l, m);
   }
-  if (2 === e && p && !f) {
-    return bb.call(this, a[0], a[1], b, g, h, k, l);
+  if (2 === e && f && !g) {
+    return cb.call(this, p[0], p[1], b, k, h, l, m);
   }
-  1 < e && (p ? (t = a[0], q = 1) : 9 < c && 3 < c / n && a.sort(aa));
+  1 < e && (f ? (w = p[0], r = 1) : 9 < c && 3 < c / t && p.sort(aa));
+  n || 0 === n || (n = this.resolution);
   if (this.db) {
-    if (this.db.search && (p = this.db.search(this, a, b, g, f, h, k, l), !1 !== p)) {
-      return p;
+    if (this.db.search && (a = this.db.search(this, p, b, k, g, h, l, m), !1 !== a)) {
+      return a;
     }
-    const r = this;
+    const x = this;
     return async function() {
-      for (let u, x; q < e; q++) {
-        x = a[q];
-        t ? (u = await Y(r, x, t, 0, 0, !1, !1), u = cb(u, d, f, r.R), f && !1 === u && d.length || (t = x)) : (u = await Y(r, x, "", 0, 0, !1, !1), u = cb(u, d, f, r.resolution));
-        if (u) {
-          return u;
+      for (let B, y; r < e; r++) {
+        y = p[r];
+        w ? (B = await Y(x, y, w, 0, 0, !1, !1), B = db(B, d, g, x.R), g && !1 === B && d.length || (w = y)) : (B = await Y(x, y, "", 0, 0, !1, !1), B = db(B, d, g, n));
+        if (B) {
+          return B;
         }
-        if (f && q === e - 1) {
-          let D = d.length;
-          if (!D) {
-            if (t) {
-              t = "";
-              q = -1;
+        if (g && r === e - 1) {
+          let v = d.length;
+          if (!v) {
+            if (w) {
+              w = "";
+              r = -1;
               continue;
             }
             return d;
           }
-          if (1 === D) {
-            return h ? W(d[0], b, g) : new X(d[0]);
+          if (1 === v) {
+            return h ? W(d[0], b, k) : new X(d[0]);
           }
         }
       }
-      return h ? Aa(d, r.resolution, b, g, f, m, h) : new X(d[0]);
+      return h ? Ba(d, n, b, k, g, q, h) : new X(d[0]);
     }();
   }
-  for (let r, u; q < e; q++) {
-    u = a[q];
-    t ? (r = Y(this, u, t, 0, 0, !1, !1), r = cb(r, d, f, this.R), f && !1 === r && d.length || (t = u)) : (r = Y(this, u, "", 0, 0, !1, !1), r = cb(r, d, f, this.resolution));
-    if (r) {
-      return r;
+  for (let x, B; r < e; r++) {
+    B = p[r];
+    w ? (x = Y(this, B, w, 0, 0, !1, !1), x = db(x, d, g, this.R), g && !1 === x && d.length || (w = B)) : (x = Y(this, B, "", 0, 0, !1, !1), x = db(x, d, g, n));
+    if (x) {
+      return x;
     }
-    if (f && q === e - 1) {
-      p = d.length;
-      if (!p) {
-        if (t) {
-          t = "";
-          q = -1;
+    if (g && r === e - 1) {
+      a = d.length;
+      if (!a) {
+        if (w) {
+          w = "";
+          r = -1;
           continue;
         }
         return d;
       }
-      if (1 === p) {
-        return h ? W(d[0], b, g) : new X(d[0]);
+      if (1 === a) {
+        return h ? W(d[0], b, k) : new X(d[0]);
       }
     }
   }
-  d = Aa(d, this.resolution, b, g, f, m, h);
+  d = Ba(d, n, b, k, g, q, h);
   return h ? d : new X(d);
 };
-function bb(a, b, c, d, e, f, g) {
+function cb(a, b, c, d, e, f, g) {
   a = Y(this, a, b, c, d, e, f, g);
-  return this.db ? a.then(function(h) {
-    return e ? h : h && h.length ? e ? W(h, c, d) : new X(h) : e ? [] : new X([]);
+  return this.db ? a.then(function(k) {
+    return e ? k : k && k.length ? e ? W(k, c, d) : new X(k) : e ? [] : new X([]);
   }) : a && a.length ? e ? W(a, c, d) : new X(a) : e ? [] : new X([]);
 }
-function cb(a, b, c, d) {
+function db(a, b, c, d) {
   let e = [];
   if (a) {
     d = Math.min(a.length, d);
@@ -1997,16 +2036,16 @@ function cb(a, b, c, d) {
   }
   return !c && e;
 }
-function Y(a, b, c, d, e, f, g, h) {
-  let k;
-  c && (k = a.bidirectional && b > c);
+function Y(a, b, c, d, e, f, g, k) {
+  let h;
+  c && (h = a.bidirectional && b > c);
   if (a.db) {
-    return c ? a.db.get(k ? c : b, k ? b : c, d, e, f, g, h) : a.db.get(b, "", d, e, f, g, h);
+    return c ? a.db.get(h ? c : b, h ? b : c, d, e, f, g, k) : a.db.get(b, "", d, e, f, g, k);
   }
-  a = c ? (a = a.ctx.get(k ? b : c)) && a.get(k ? c : b) : a.map.get(b);
+  a = c ? (a = a.ctx.get(h ? b : c)) && a.get(h ? c : b) : a.map.get(b);
   return a;
 }
-;L.prototype.remove = function(a, b) {
+;M.prototype.remove = function(a, b) {
   const c = this.reg.size && (this.fastupdate ? this.reg.get(a) : this.reg.has(a));
   if (c) {
     if (this.fastupdate) {
@@ -2021,15 +2060,15 @@ function Y(a, b, c, d, e, f, g, h) {
         }
       }
     } else {
-      db(this.map, a), this.depth && db(this.ctx, a);
+      eb(this.map, a), this.depth && eb(this.ctx, a);
     }
     b || this.reg.delete(a);
   }
-  this.db && (this.commit_task.push({del:a}), this.T && Va(this));
+  this.db && (this.commit_task.push({del:a}), this.T && Wa(this));
   this.cache && this.cache.remove(a);
   return this;
 };
-function db(a, b) {
+function eb(a, b) {
   let c = 0;
   if (a.constructor === Array) {
     for (let d = 0, e, f; d < a.length; d++) {
@@ -2044,67 +2083,66 @@ function db(a, b) {
     }
   } else {
     for (let d of a) {
-      const e = d[0], f = db(d[1], b);
+      const e = d[0], f = eb(d[1], b);
       f ? c += f : a.delete(e);
     }
   }
   return c;
 }
-;function L(a, b) {
-  if (!this || this.constructor !== L) {
-    return new L(a);
+;function M(a, b) {
+  if (!this || this.constructor !== M) {
+    return new M(a);
   }
   if (a) {
     var c = G(a) ? a : a.preset;
-    c && (Ta[c] || console.warn("Preset not found: " + c), a = Object.assign({}, Ta[c], a));
+    c && (Ua[c] || console.warn("Preset not found: " + c), a = Object.assign({}, Ua[c], a));
   } else {
     a = {};
   }
-  c = a.context || {};
-  const d = G(a.encoder) ? Sa[a.encoder] : a.encode || a.encoder || Ka;
-  this.encoder = d.encode ? d : "object" === typeof d ? new K(d) : {encode:d};
-  let e;
+  c = a.context;
+  const d = !0 === c ? {depth:1} : c || {}, e = G(a.encoder) ? Ta[a.encoder] : a.encode || a.encoder || La;
+  this.encoder = e.encode ? e : "object" === typeof e ? new K(e) : {encode:e};
   this.resolution = a.resolution || 9;
-  this.tokenize = e = a.tokenize || "strict";
-  this.depth = "strict" === e && c.depth || 0;
-  this.bidirectional = !1 !== c.bidirectional;
+  this.tokenize = c = a.tokenize || "strict";
+  this.depth = "strict" === c && d.depth || 0;
+  this.bidirectional = !1 !== d.bidirectional;
   this.fastupdate = !!a.fastupdate;
   this.score = a.score || null;
-  (e = a.keystore || 0) && (this.keystore = e);
-  this.map = e ? new R(e) : new Map();
-  this.ctx = e ? new R(e) : new Map();
-  this.reg = b || (this.fastupdate ? e ? new R(e) : new Map() : e ? new S(e) : new Set());
-  this.R = c.resolution || 1;
-  this.rtl = d.rtl || a.rtl || !1;
-  this.cache = (e = a.cache || null) && new U(e);
+  (c = a.keystore || 0) && (this.keystore = c);
+  this.map = c ? new R(c) : new Map();
+  this.ctx = c ? new R(c) : new Map();
+  this.reg = b || (this.fastupdate ? c ? new R(c) : new Map() : c ? new S(c) : new Set());
+  this.R = d.resolution || 3;
+  this.rtl = e.rtl || a.rtl || !1;
+  this.cache = (c = a.cache || null) && new U(c);
   this.resolve = !1 !== a.resolve;
-  if (e = a.db) {
-    this.db = this.mount(e);
+  if (c = a.db) {
+    this.db = this.mount(c);
   }
   this.T = !1 !== a.commit;
   this.commit_task = [];
   this.commit_timer = null;
 }
-v = L.prototype;
-v.mount = function(a) {
+u = M.prototype;
+u.mount = function(a) {
   this.commit_timer && (clearTimeout(this.commit_timer), this.commit_timer = null);
   return a.mount(this);
 };
-v.commit = function(a, b) {
+u.commit = function(a, b) {
   this.commit_timer && (clearTimeout(this.commit_timer), this.commit_timer = null);
   return this.db.commit(this, a, b);
 };
-v.destroy = function() {
+u.destroy = function() {
   this.commit_timer && (clearTimeout(this.commit_timer), this.commit_timer = null);
   return this.db.destroy();
 };
-function Va(a) {
+function Wa(a) {
   a.commit_timer || (a.commit_timer = setTimeout(function() {
     a.commit_timer = null;
     a.db.commit(a, void 0, void 0);
   }, 0));
 }
-v.clear = function() {
+u.clear = function() {
   this.map.clear();
   this.ctx.clear();
   this.reg.clear();
@@ -2112,17 +2150,17 @@ v.clear = function() {
   this.db && (this.commit_timer && clearTimeout(this.commit_timer), this.commit_timer = null, this.commit_task = [{clear:!0}]);
   return this;
 };
-v.append = function(a, b) {
+u.append = function(a, b) {
   return this.add(a, b, !0);
 };
-v.contain = function(a) {
+u.contain = function(a) {
   return this.db ? this.db.has(a) : this.reg.has(a);
 };
-v.update = function(a, b) {
+u.update = function(a, b) {
   const c = this, d = this.remove(a);
   return d && d.then ? d.then(() => c.add(a, b)) : this.add(a, b);
 };
-function eb(a) {
+function fb(a) {
   let b = 0;
   if (a.constructor === Array) {
     for (let c = 0, d; c < a.length; c++) {
@@ -2130,27 +2168,27 @@ function eb(a) {
     }
   } else {
     for (const c of a) {
-      const d = c[0], e = eb(c[1]);
+      const d = c[0], e = fb(c[1]);
       e ? b += e : a.delete(d);
     }
   }
   return b;
 }
-v.cleanup = function() {
+u.cleanup = function() {
   if (!this.fastupdate) {
     return console.info('Cleanup the index isn\'t required when not using "fastupdate".'), this;
   }
-  eb(this.map);
-  this.depth && eb(this.ctx);
+  fb(this.map);
+  this.depth && fb(this.ctx);
   return this;
 };
-v.searchCache = Ja;
-v.export = function(a, b, c, d = 0) {
+u.searchCache = Ka;
+u.export = function(a, b, c, d = 0) {
   let e, f;
   switch(d) {
     case 0:
       e = "reg";
-      f = sa(this.reg);
+      f = ta(this.reg);
       break;
     case 1:
       e = "cfg";
@@ -2158,33 +2196,33 @@ v.export = function(a, b, c, d = 0) {
       break;
     case 2:
       e = "map";
-      f = oa(this.map, this.reg.size);
+      f = pa(this.map, this.reg.size);
       break;
     case 3:
       e = "ctx";
-      f = qa(this.ctx, this.reg.size);
+      f = ra(this.ctx, this.reg.size);
       break;
     default:
       return;
   }
-  return ua.call(this, a, b, e, f, c, d);
+  return va.call(this, a, b, e, f, c, d);
 };
-v.import = function(a, b) {
+u.import = function(a, b) {
   if (b) {
     switch(G(b) && (b = JSON.parse(b)), a = a.split("."), "json" === a[a.length - 1] && a.pop(), a = 1 < a.length ? a[1] : a[0], a) {
       case "reg":
         this.fastupdate = !1;
-        this.reg = ta(b, this.reg);
+        this.reg = ua(b, this.reg);
         break;
       case "map":
-        this.map = pa(b, this.map);
+        this.map = qa(b, this.map);
         break;
       case "ctx":
-        this.ctx = ra(b, this.ctx);
+        this.ctx = sa(b, this.ctx);
     }
   }
 };
-v.serialize = function(a = !0) {
+u.serialize = function(a = !0) {
   if (!this.reg.size) {
     return "";
   }
@@ -2195,50 +2233,50 @@ v.serialize = function(a = !0) {
   b = "index.reg=new Set([" + b + "]);";
   d = "";
   for (var e of this.map.entries()) {
-    var f = e[0], g = e[1], h = "";
-    for (let m = 0, p; m < g.length; m++) {
-      p = g[m] || [""];
-      var k = "";
-      for (var l = 0; l < p.length; l++) {
-        k += (k ? "," : "") + ("string" === c ? '"' + p[l] + '"' : p[l]);
+    var f = e[0], g = e[1], k = "";
+    for (let m = 0, q; m < g.length; m++) {
+      q = g[m] || [""];
+      var h = "";
+      for (var l = 0; l < q.length; l++) {
+        h += (h ? "," : "") + ("string" === c ? '"' + q[l] + '"' : q[l]);
       }
-      k = "[" + k + "]";
-      h += (h ? "," : "") + k;
+      h = "[" + h + "]";
+      k += (k ? "," : "") + h;
     }
-    h = '["' + f + '",[' + h + "]]";
-    d += (d ? "," : "") + h;
+    k = '["' + f + '",[' + k + "]]";
+    d += (d ? "," : "") + k;
   }
   d = "index.map=new Map([" + d + "]);";
   e = "";
   for (const m of this.ctx.entries()) {
     f = m[0];
     g = m[1];
-    for (const p of g.entries()) {
-      g = p[0];
-      h = p[1];
-      k = "";
-      for (let n = 0, q; n < h.length; n++) {
-        q = h[n] || [""];
+    for (const q of g.entries()) {
+      g = q[0];
+      k = q[1];
+      h = "";
+      for (let n = 0, p; n < k.length; n++) {
+        p = k[n] || [""];
         l = "";
-        for (let t = 0; t < q.length; t++) {
-          l += (l ? "," : "") + ("string" === c ? '"' + q[t] + '"' : q[t]);
+        for (let t = 0; t < p.length; t++) {
+          l += (l ? "," : "") + ("string" === c ? '"' + p[t] + '"' : p[t]);
         }
         l = "[" + l + "]";
-        k += (k ? "," : "") + l;
+        h += (h ? "," : "") + l;
       }
-      k = 'new Map([["' + g + '",[' + k + "]]])";
-      k = '["' + f + '",' + k + "]";
-      e += (e ? "," : "") + k;
+      h = 'new Map([["' + g + '",[' + h + "]]])";
+      h = '["' + f + '",' + h + "]";
+      e += (e ? "," : "") + h;
     }
   }
   e = "index.ctx=new Map([" + e + "]);";
   return a ? "function inject(index){" + b + d + e + "}" : b + d + e;
 };
-na(L.prototype);
-const fb = "undefined" !== typeof window && (window.indexedDB || window.mozIndexedDB || window.webkitIndexedDB || window.msIndexedDB), gb = ["map", "ctx", "tag", "reg", "cfg"];
-function hb(a, b = {}) {
+oa(M.prototype);
+const gb = "undefined" !== typeof window && (window.indexedDB || window.mozIndexedDB || window.webkitIndexedDB || window.msIndexedDB), hb = ["map", "ctx", "tag", "reg", "cfg"];
+function ib(a, b = {}) {
   if (!this) {
-    return new hb(a, b);
+    return new ib(a, b);
   }
   "object" === typeof a && (b = a = a.name);
   a || console.info("Default storage space was used, because a name was not passed.");
@@ -2248,22 +2286,22 @@ function hb(a, b = {}) {
   this.db = null;
   this.h = {};
 }
-v = hb.prototype;
-v.mount = function(a) {
+u = ib.prototype;
+u.mount = function(a) {
   if (!a.encoder) {
     return a.mount(this);
   }
   a.db = this;
   return this.open();
 };
-v.open = function() {
+u.open = function() {
   let a = this;
   navigator.storage && navigator.storage.persist();
   return this.db || new Promise(function(b, c) {
-    const d = fb.open(a.id + (a.field ? ":" + a.field : ""), 1);
+    const d = gb.open(a.id + (a.field ? ":" + a.field : ""), 1);
     d.onupgradeneeded = function() {
       const e = a.db = this.result;
-      gb.forEach(f => {
+      hb.forEach(f => {
         e.objectStoreNames.contains(f) || e.createObjectStore(f);
       });
     };
@@ -2284,54 +2322,54 @@ v.open = function() {
     };
   });
 };
-v.close = function() {
+u.close = function() {
   this.db.close();
   this.db = null;
 };
-v.destroy = function() {
-  return fb.deleteDatabase(this.id + (this.field ? ":" + this.field : ""));
+u.destroy = function() {
+  return gb.deleteDatabase(this.id + (this.field ? ":" + this.field : ""));
 };
-v.clear = function() {
-  const a = this.db.transaction(gb, "readwrite");
-  for (let b = 0; b < gb.length; b++) {
-    a.objectStore(gb[b]).clear();
+u.clear = function() {
+  const a = this.db.transaction(hb, "readwrite");
+  for (let b = 0; b < hb.length; b++) {
+    a.objectStore(hb[b]).clear();
   }
   return Z(a);
 };
-v.get = function(a, b, c = 0, d = 0, e = !0, f = !1) {
+u.get = function(a, b, c = 0, d = 0, e = !0, f = !1) {
   a = this.db.transaction(b ? "ctx" : "map", "readonly").objectStore(b ? "ctx" : "map").get(b ? b + ":" + a : a);
   const g = this;
-  return Z(a).then(function(h) {
-    let k = [];
-    if (!h || !h.length) {
-      return k;
+  return Z(a).then(function(k) {
+    let h = [];
+    if (!k || !k.length) {
+      return h;
     }
     if (e) {
-      if (!c && !d && 1 === h.length) {
-        return h[0];
+      if (!c && !d && 1 === k.length) {
+        return k[0];
       }
-      for (let l = 0, m; l < h.length; l++) {
-        if ((m = h[l]) && m.length) {
+      for (let l = 0, m; l < k.length; l++) {
+        if ((m = k[l]) && m.length) {
           if (d >= m.length) {
             d -= m.length;
             continue;
           }
-          const p = c ? d + Math.min(m.length - d, c) : m.length;
-          for (let n = d; n < p; n++) {
-            k.push(m[n]);
+          const q = c ? d + Math.min(m.length - d, c) : m.length;
+          for (let n = d; n < q; n++) {
+            h.push(m[n]);
           }
           d = 0;
-          if (k.length === c) {
+          if (h.length === c) {
             break;
           }
         }
       }
-      return f ? g.enrich(k) : k;
+      return f ? g.enrich(h) : h;
     }
-    return h;
+    return k;
   });
 };
-v.tag = function(a, b = 0, c = 0, d = !1) {
+u.tag = function(a, b = 0, c = 0, d = !1) {
   a = this.db.transaction("tag", "readonly").objectStore("tag").get(a);
   const e = this;
   return Z(a).then(function(f) {
@@ -2345,7 +2383,7 @@ v.tag = function(a, b = 0, c = 0, d = !1) {
     return d ? e.enrich(f) : f;
   });
 };
-v.enrich = function(a) {
+u.enrich = function(a) {
   "object" !== typeof a && (a = [a]);
   const b = this.db.transaction("reg", "readonly").objectStore("reg"), c = [];
   for (let d = 0; d < a.length; d++) {
@@ -2358,14 +2396,14 @@ v.enrich = function(a) {
     return d;
   });
 };
-v.has = function(a) {
+u.has = function(a) {
   a = this.db.transaction("reg", "readonly").objectStore("reg").getKey(a);
   return Z(a);
 };
-v.search = null;
-v.info = function() {
+u.search = null;
+u.info = function() {
 };
-v.transaction = function(a, b, c) {
+u.transaction = function(a, b, c) {
   let d = this.h[a + ":" + b];
   if (d) {
     return c.call(this, d);
@@ -2373,20 +2411,20 @@ v.transaction = function(a, b, c) {
   let e = this.db.transaction(a, b);
   this.h[a + ":" + b] = d = e.objectStore(a);
   return new Promise((f, g) => {
-    e.onerror = h => {
+    e.onerror = k => {
       this.h[a + ":" + b] = null;
       e.abort();
       e = d = null;
-      g(h);
+      g(k);
     };
-    e.oncomplete = h => {
+    e.oncomplete = k => {
       e = d = this.h[a + ":" + b] = null;
-      f(h || !0);
+      f(k || !0);
     };
     return c.call(this, d);
   });
 };
-v.commit = async function(a, b, c) {
+u.commit = async function(a, b, c) {
   if (b) {
     await this.clear(), a.commit_task = [];
   } else {
@@ -2407,54 +2445,54 @@ v.commit = async function(a, b, c) {
     for (const e of a.map) {
       const f = e[0], g = e[1];
       g.length && (b ? d.put(g, f) : d.get(f).onsuccess = function() {
-        let h = this.result;
-        var k;
-        if (h && h.length) {
-          const l = Math.max(h.length, g.length);
-          for (let m = 0, p, n; m < l; m++) {
+        let k = this.result;
+        var h;
+        if (k && k.length) {
+          const l = Math.max(k.length, g.length);
+          for (let m = 0, q, n; m < l; m++) {
             if ((n = g[m]) && n.length) {
-              if ((p = h[m]) && p.length) {
-                for (k = 0; k < n.length; k++) {
-                  p.push(n[k]);
+              if ((q = k[m]) && q.length) {
+                for (h = 0; h < n.length; h++) {
+                  q.push(n[h]);
                 }
               } else {
-                h[m] = n;
+                k[m] = n;
               }
-              k = 1;
+              h = 1;
             }
           }
         } else {
-          h = g, k = 1;
+          k = g, h = 1;
         }
-        k && d.put(h, f);
+        h && d.put(k, f);
       });
     }
   }), await this.transaction("ctx", "readwrite", function(d) {
     for (const e of a.ctx) {
       const f = e[0], g = e[1];
-      for (const h of g) {
-        const k = h[0], l = h[1];
-        l.length && (b ? d.put(l, f + ":" + k) : d.get(f + ":" + k).onsuccess = function() {
+      for (const k of g) {
+        const h = k[0], l = k[1];
+        l.length && (b ? d.put(l, f + ":" + h) : d.get(f + ":" + h).onsuccess = function() {
           let m = this.result;
-          var p;
+          var q;
           if (m && m.length) {
             const n = Math.max(m.length, l.length);
-            for (let q = 0, t, r; q < n; q++) {
-              if ((r = l[q]) && r.length) {
-                if ((t = m[q]) && t.length) {
-                  for (p = 0; p < r.length; p++) {
-                    t.push(r[p]);
+            for (let p = 0, t, r; p < n; p++) {
+              if ((r = l[p]) && r.length) {
+                if ((t = m[p]) && t.length) {
+                  for (q = 0; q < r.length; q++) {
+                    t.push(r[q]);
                   }
                 } else {
-                  m[q] = r;
+                  m[p] = r;
                 }
-                p = 1;
+                q = 1;
               }
             }
           } else {
-            m = l, p = 1;
+            m = l, q = 1;
           }
-          p && d.put(m, f + ":" + k);
+          q && d.put(m, f + ":" + h);
         });
       }
     }
@@ -2471,29 +2509,29 @@ v.commit = async function(a, b, c) {
     for (const e of a.tag) {
       const f = e[0], g = e[1];
       g.length && (d.get(f).onsuccess = function() {
-        let h = this.result;
-        h = h && h.length ? h.concat(g) : g;
-        d.put(h, f);
+        let k = this.result;
+        k = k && k.length ? k.concat(g) : g;
+        d.put(k, f);
       });
     }
   }), a.map.clear(), a.ctx.clear(), a.tag && a.tag.clear(), a.store && a.store.clear(), a.document || a.reg.clear());
 };
-function jb(a, b, c) {
+function kb(a, b, c) {
   const d = a.value;
   let e, f, g = 0;
-  for (let h = 0, k; h < d.length; h++) {
-    if (k = c ? d : d[h]) {
-      for (let l = 0, m, p; l < b.length; l++) {
-        if (p = b[l], m = k.indexOf(f ? parseInt(p, 10) : p), 0 > m && !f && "string" === typeof p && !isNaN(p) && (m = k.indexOf(parseInt(p, 10))) && (f = 1), 0 <= m) {
-          if (e = 1, 1 < k.length) {
-            k.splice(m, 1);
+  for (let k = 0, h; k < d.length; k++) {
+    if (h = c ? d : d[k]) {
+      for (let l = 0, m, q; l < b.length; l++) {
+        if (q = b[l], m = h.indexOf(f ? parseInt(q, 10) : q), 0 > m && !f && "string" === typeof q && !isNaN(q) && (m = h.indexOf(parseInt(q, 10))) && (f = 1), 0 <= m) {
+          if (e = 1, 1 < h.length) {
+            h.splice(m, 1);
           } else {
-            d[h] = [];
+            d[k] = [];
             break;
           }
         }
       }
-      g += k.length;
+      g += h.length;
     }
     if (c) {
       break;
@@ -2502,22 +2540,22 @@ function jb(a, b, c) {
   g ? e && a.update(d) : a.delete();
   a.continue();
 }
-v.remove = function(a) {
+u.remove = function(a) {
   "object" !== typeof a && (a = [a]);
   return Promise.all([this.transaction("map", "readwrite", function(b) {
     b.openCursor().onsuccess = function() {
       const c = this.result;
-      c && jb(c, a);
+      c && kb(c, a);
     };
   }), this.transaction("ctx", "readwrite", function(b) {
     b.openCursor().onsuccess = function() {
       const c = this.result;
-      c && jb(c, a);
+      c && kb(c, a);
     };
   }), this.transaction("tag", "readwrite", function(b) {
     b.openCursor().onsuccess = function() {
       const c = this.result;
-      c && jb(c, a, !0);
+      c && kb(c, a, !0);
     };
   }), this.transaction("reg", "readwrite", function(b) {
     for (let c = 0; c < a.length; c++) {
@@ -2537,9 +2575,9 @@ function Z(a) {
     a = null;
   });
 }
-;const kb = {Index:L, Charset:Sa, Encoder:K, Document:T, Worker:N, Resolver:X, IndexedDB:hb, Language:{}}, lb = self;
-let mb;
-(mb = lb.define) && mb.amd ? mb([], function() {
-  return kb;
-}) : "object" === typeof lb.exports ? lb.exports = kb : lb.FlexSearch = kb;
+;const lb = {Index:M, Charset:Ta, Encoder:K, Document:T, Worker:N, Resolver:X, IndexedDB:ib, Language:{}}, mb = self;
+let nb;
+(nb = mb.define) && nb.amd ? nb([], function() {
+  return lb;
+}) : "object" === typeof mb.exports ? mb.exports = lb : mb.FlexSearch = lb;
 }(this||self));
diff --git a/dist/flexsearch.bundle.min.js b/dist/flexsearch.bundle.min.js
index c8de083..e816e99 100644
--- a/dist/flexsearch.bundle.min.js
+++ b/dist/flexsearch.bundle.min.js
@@ -5,98 +5,101 @@
  * Hosted by Nextapps GmbH
  * https://github.com/nextapps-de/flexsearch
  */
-(function _f(self){'use strict';if(typeof module!=='undefined')self=module;else if(typeof process !== 'undefined')self=process;self._factory=_f;var v;function z(a,b,c){const d=typeof c,e=typeof a;if("undefined"!==d){if("undefined"!==e){if(c){if("function"===e&&d===e)return function(h){return a(c(h))};b=a.constructor;if(b===c.constructor){if(b===Array)return c.concat(a);if(b===Map){var f=new Map(c);for(var g of a)f.set(g[0],g[1]);return f}if(b===Set){g=new Set(c);for(f of a.values())g.add(f);return g}}}return a}return c}return"undefined"===e?b:a}function B(){return Object.create(null)}function aa(a,b){return b.length-a.length}
+(function _f(self){'use strict';if(typeof module!=='undefined')self=module;else if(typeof process !== 'undefined')self=process;self._factory=_f;var u;function z(a,b,c){const d=typeof c,e=typeof a;if("undefined"!==d){if("undefined"!==e){if(c){if("function"===e&&d===e)return function(k){return a(c(k))};b=a.constructor;if(b===c.constructor){if(b===Array)return c.concat(a);if(b===Map){var f=new Map(c);for(var g of a)f.set(g[0],g[1]);return f}if(b===Set){g=new Set(c);for(f of a.values())g.add(f);return g}}}return a}return c}return"undefined"===e?b:a}function C(){return Object.create(null)}function aa(a,b){return b.length-a.length}
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+function Y(a,b,c,d,e,f,g,k){let h;c&&(h=a.bidirectional&&b>c);if(a.db)return c?a.db.get(h?c:b,h?b:c,d,e,f,g,k):a.db.get(b,"",d,e,f,g,k);a=c?(a=a.ctx.get(h?b:c))&&a.get(h?c:b):a.map.get(b);return a};M.prototype.remove=function(a,b){const c=this.reg.size&&(this.fastupdate?this.reg.get(a):this.reg.has(a));if(c){if(this.fastupdate)for(let d=0,e;d<c.length;d++){if(e=c[d])if(2>e.length)e.pop();else{const f=e.indexOf(a);f===c.length-1?e.pop():e.splice(f,1)}}else eb(this.map,a),this.depth&&eb(this.ctx,a);b||this.reg.delete(a)}this.db&&(this.commit_task.push({del:a}),this.T&&Wa(this));this.cache&&this.cache.remove(a);return this};
+function eb(a,b){let c=0;if(a.constructor===Array)for(let d=0,e,f;d<a.length;d++){if((e=a[d])&&e.length)if(f=e.indexOf(b),0<=f){1<e.length?(e.splice(f,1),c++):delete a[d];break}else c++}else for(let d of a){const e=d[0],f=eb(d[1],b);f?c+=f:a.delete(e)}return c};function M(a,b){if(!this||this.constructor!==M)return new M(a);if(a){var c=F(a)?a:a.preset;c&&(a=Object.assign({},Ua[c],a))}else a={};c=a.context;const d=!0===c?{depth:1}:c||{},e=F(a.encoder)?Ta[a.encoder]:a.encode||a.encoder||La;this.encoder=e.encode?e:"object"===typeof e?new K(e):{encode:e};this.resolution=a.resolution||9;this.tokenize=c=a.tokenize||"strict";this.depth="strict"===c&&d.depth||0;this.bidirectional=!1!==d.bidirectional;this.fastupdate=!!a.fastupdate;this.score=a.score||null;(c=a.keystore||
+0)&&(this.keystore=c);this.map=c?new R(c):new Map;this.ctx=c?new R(c):new Map;this.reg=b||(this.fastupdate?c?new R(c):new Map:c?new S(c):new Set);this.R=d.resolution||3;this.rtl=e.rtl||a.rtl||!1;this.cache=(c=a.cache||null)&&new U(c);this.resolve=!1!==a.resolve;if(c=a.db)this.db=this.mount(c);this.T=!1!==a.commit;this.commit_task=[];this.commit_timer=null}u=M.prototype;u.mount=function(a){this.commit_timer&&(clearTimeout(this.commit_timer),this.commit_timer=null);return a.mount(this)};
+u.commit=function(a,b){this.commit_timer&&(clearTimeout(this.commit_timer),this.commit_timer=null);return this.db.commit(this,a,b)};u.destroy=function(){this.commit_timer&&(clearTimeout(this.commit_timer),this.commit_timer=null);return this.db.destroy()};function Wa(a){a.commit_timer||(a.commit_timer=setTimeout(function(){a.commit_timer=null;a.db.commit(a,void 0,void 0)},0))}
+u.clear=function(){this.map.clear();this.ctx.clear();this.reg.clear();this.cache&&this.cache.clear();this.db&&(this.commit_timer&&clearTimeout(this.commit_timer),this.commit_timer=null,this.commit_task=[{clear:!0}]);return this};u.append=function(a,b){return this.add(a,b,!0)};u.contain=function(a){return this.db?this.db.has(a):this.reg.has(a)};u.update=function(a,b){const c=this,d=this.remove(a);return d&&d.then?d.then(()=>c.add(a,b)):this.add(a,b)};
+function fb(a){let b=0;if(a.constructor===Array)for(let c=0,d;c<a.length;c++)(d=a[c])&&(b+=d.length);else for(const c of a){const d=c[0],e=fb(c[1]);e?b+=e:a.delete(d)}return b}u.cleanup=function(){if(!this.fastupdate)return this;fb(this.map);this.depth&&fb(this.ctx);return this};u.searchCache=Ka;
+u.export=function(a,b,c,d=0){let e,f;switch(d){case 0:e="reg";f=ta(this.reg);break;case 1:e="cfg";f={};break;case 2:e="map";f=pa(this.map,this.reg.size);break;case 3:e="ctx";f=ra(this.ctx,this.reg.size);break;default:return}return va.call(this,a,b,e,f,c,d)};
+u.import=function(a,b){if(b)switch(F(b)&&(b=JSON.parse(b)),a=a.split("."),"json"===a[a.length-1]&&a.pop(),a=1<a.length?a[1]:a[0],a){case "reg":this.fastupdate=!1;this.reg=ua(b,this.reg);break;case "map":this.map=qa(b,this.map);break;case "ctx":this.ctx=sa(b,this.ctx)}};
+u.serialize=function(a=!0){if(!this.reg.size)return"";let b="",c="";for(var d of this.reg.keys())c||(c=typeof d),b+=(b?",":"")+("string"===c?'"'+d+'"':d);b="index.reg=new Set(["+b+"]);";d="";for(var e of this.map.entries()){var f=e[0],g=e[1],k="";for(let m=0,q;m<g.length;m++){q=g[m]||[""];var h="";for(var l=0;l<q.length;l++)h+=(h?",":"")+("string"===c?'"'+q[l]+'"':q[l]);h="["+h+"]";k+=(k?",":"")+h}k='["'+f+'",['+k+"]]";d+=(d?",":"")+k}d="index.map=new Map(["+d+"]);";e="";for(const m of this.ctx.entries()){f=
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+function jb(a,b={}){if(!this)return new jb(a,b);"object"===typeof a&&(b=a=a.name);a||console.info("Default storage space was used, because a name was not passed.");this.id="flexsearch"+(a?":"+a.toLowerCase().replace(/[^a-z0-9_\-]/g,""):"");this.field=b.field?b.field.toLowerCase().replace(/[^a-z0-9_\-]/g,""):"";this.support_tag_search=!1;this.db=null;this.h={}}u=jb.prototype;u.mount=function(a){if(!a.encoder)return a.mount(this);a.db=this;return this.open()};
+u.open=function(){let a=this;navigator.storage&&navigator.storage.persist();return this.db||new Promise(function(b,c){const d=gb.open(a.id+(a.field?":"+a.field:""),1);d.onupgradeneeded=function(){const e=a.db=this.result;hb.forEach(f=>{e.objectStoreNames.contains(f)||e.createObjectStore(f)})};d.onblocked=function(e){console.error("blocked",e);c()};d.onerror=function(e){console.error(this.error,e);c()};d.onsuccess=function(){a.db=this.result;a.db.onversionchange=function(){a.close()};b(a)}})};
+u.close=function(){this.db.close();this.db=null};u.destroy=function(){return gb.deleteDatabase(this.id+(this.field?":"+this.field:""))};u.clear=function(){const a=this.db.transaction(hb,"readwrite");for(let b=0;b<hb.length;b++)a.objectStore(hb[b]).clear();return Z(a)};
+u.get=function(a,b,c=0,d=0,e=!0,f=!1){a=this.db.transaction(b?"ctx":"map","readonly").objectStore(b?"ctx":"map").get(b?b+":"+a:a);const g=this;return Z(a).then(function(k){let h=[];if(!k||!k.length)return h;if(e){if(!c&&!d&&1===k.length)return k[0];for(let l=0,m;l<k.length;l++)if((m=k[l])&&m.length){if(d>=m.length){d-=m.length;continue}const q=c?d+Math.min(m.length-d,c):m.length;for(let n=d;n<q;n++)h.push(m[n]);d=0;if(h.length===c)break}return f?g.enrich(h):h}return k})};
+u.tag=function(a,b=0,c=0,d=!1){a=this.db.transaction("tag","readonly").objectStore("tag").get(a);const e=this;return Z(a).then(function(f){if(!f||!f.length||c>=f.length)return[];if(!b&&!c)return f;f=f.slice(c,c+b);return d?e.enrich(f):f})};
+u.enrich=function(a){"object"!==typeof a&&(a=[a]);const b=this.db.transaction("reg","readonly").objectStore("reg"),c=[];for(let d=0;d<a.length;d++)c[d]=Z(b.get(a[d]));return Promise.all(c).then(function(d){for(let e=0;e<d.length;e++)d[e]={id:a[e],doc:d[e]?JSON.parse(d[e]):null};return d})};u.has=function(a){a=this.db.transaction("reg","readonly").objectStore("reg").getKey(a);return Z(a)};u.search=null;u.info=function(){};
+u.transaction=function(a,b,c){let d=this.h[a+":"+b];if(d)return c.call(this,d);let e=this.db.transaction(a,b);this.h[a+":"+b]=d=e.objectStore(a);return new Promise((f,g)=>{e.onerror=k=>{this.h[a+":"+b]=null;e.abort();e=d=null;g(k)};e.oncomplete=k=>{e=d=this.h[a+":"+b]=null;f(k||!0)};return c.call(this,d)})};
+u.commit=async function(a,b,c){if(b)await this.clear(),a.commit_task=[];else{let d=a.commit_task;a.commit_task=[];for(let e=0,f;e<d.length;e++)if(f=d[e],f.clear){await this.clear();b=!0;break}else d[e]=f.V;b||(c||(d=d.concat(ba(a.reg))),d.length&&await this.remove(d))}a.reg.size&&(await this.transaction("map","readwrite",function(d){for(const e of a.map){const f=e[0],g=e[1];g.length&&(b?d.put(g,f):d.get(f).onsuccess=function(){let k=this.result;var h;if(k&&k.length){const l=Math.max(k.length,g.length);
+for(let m=0,q,n;m<l;m++)if((n=g[m])&&n.length){if((q=k[m])&&q.length)for(h=0;h<n.length;h++)q.push(n[h]);else k[m]=n;h=1}}else k=g,h=1;h&&d.put(k,f)})}}),await this.transaction("ctx","readwrite",function(d){for(const e of a.ctx){const f=e[0],g=e[1];for(const k of g){const h=k[0],l=k[1];l.length&&(b?d.put(l,f+":"+h):d.get(f+":"+h).onsuccess=function(){let m=this.result;var q;if(m&&m.length){const n=Math.max(m.length,l.length);for(let p=0,r,t;p<n;p++)if((t=l[p])&&t.length){if((r=m[p])&&r.length)for(q=
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+k=k&&k.length?k.concat(g):g;d.put(k,f)})}}),a.map.clear(),a.ctx.clear(),a.tag&&a.tag.clear(),a.store&&a.store.clear(),a.document||a.reg.clear())};
+function kb(a,b,c){const d=a.value;let e,f,g=0;for(let k=0,h;k<d.length;k++){if(h=c?d:d[k]){for(let l=0,m,q;l<b.length;l++)if(q=b[l],m=h.indexOf(f?parseInt(q,10):q),0>m&&!f&&"string"===typeof q&&!isNaN(q)&&(m=h.indexOf(parseInt(q,10)))&&(f=1),0<=m)if(e=1,1<h.length)h.splice(m,1);else{d[k]=[];break}g+=h.length}if(c)break}g?e&&a.update(d):a.delete();a.continue()}
+u.remove=function(a){"object"!==typeof a&&(a=[a]);return Promise.all([this.transaction("map","readwrite",function(b){b.openCursor().onsuccess=function(){const c=this.result;c&&kb(c,a)}}),this.transaction("ctx","readwrite",function(b){b.openCursor().onsuccess=function(){const c=this.result;c&&kb(c,a)}}),this.transaction("tag","readwrite",function(b){b.openCursor().onsuccess=function(){const c=this.result;c&&kb(c,a,!0)}}),this.transaction("reg","readwrite",function(b){for(let c=0;c<a.length;c++)b.delete(a[c])})])};
+function Z(a){return new Promise((b,c)=>{a.onsuccess=function(){b(this.result)};a.oncomplete=function(){b(this.result)};a.onerror=c;a=null})};const lb={Index:M,Charset:Ta,Encoder:K,Document:T,Worker:N,Resolver:X,IndexedDB:jb,Language:{}},mb=self;let nb;(nb=mb.define)&&nb.amd?nb([],function(){return lb}):"object"===typeof mb.exports?mb.exports=lb:mb.FlexSearch=lb;}(this||self));
diff --git a/dist/flexsearch.bundle.module.debug.js b/dist/flexsearch.bundle.module.debug.js
index c3db4a9..5d45444 100644
--- a/dist/flexsearch.bundle.module.debug.js
+++ b/dist/flexsearch.bundle.module.debug.js
@@ -5,15 +5,15 @@
  * Hosted by Nextapps GmbH
  * https://github.com/nextapps-de/flexsearch
  */
-var v;
+var u;
 function z(a, b, c) {
   const d = typeof c, e = typeof a;
   if ("undefined" !== d) {
     if ("undefined" !== e) {
       if (c) {
         if ("function" === e && d === e) {
-          return function(h) {
-            return a(c(h));
+          return function(k) {
+            return a(c(k));
           };
         }
         b = a.constructor;
@@ -43,7 +43,7 @@ function z(a, b, c) {
   }
   return "undefined" === e ? b : a;
 }
-function B() {
+function C() {
   return Object.create(null);
 }
 function aa(a, b) {
@@ -96,7 +96,8 @@ function K(a) {
     this.assign(arguments[b]);
   }
 }
-K.prototype.assign = function(a) {
+u = K.prototype;
+u.assign = function(a) {
   this.normalize = z(a.normalize, !0, this.normalize);
   let b = a.include, c = b || a.exclude || a.split;
   if ("object" === typeof c) {
@@ -137,26 +138,77 @@ K.prototype.assign = function(a) {
   this.minlength = z(a.minlength, 1, this.minlength);
   this.maxlength = z(a.maxlength, 0, this.maxlength);
   if (this.cache = c = z(a.cache, !0, this.cache)) {
-    this.L = null, this.S = "number" === typeof c ? c : 2e5, this.H = new Map(), this.J = new Map(), this.A = this.h = 128;
+    this.L = null, this.S = "number" === typeof c ? c : 2e5, this.H = new Map(), this.I = new Map(), this.M = this.B = 128;
   }
-  this.B = "";
+  this.h = "";
+  this.N = null;
+  this.A = "";
   this.O = null;
-  this.M = "";
-  this.P = null;
   if (this.matcher) {
     for (const d of this.matcher.keys()) {
-      this.B += (this.B ? "|" : "") + d;
+      this.h += (this.h ? "|" : "") + d;
     }
   }
   if (this.stemmer) {
     for (const d of this.stemmer.keys()) {
-      this.M += (this.M ? "|" : "") + d;
+      this.A += (this.A ? "|" : "") + d;
     }
   }
   return this;
 };
-K.prototype.encode = function(a) {
-  if (this.cache && a.length <= this.h) {
+u.addMatcher = function(a, b) {
+  if ("object" === typeof a) {
+    return this.addReplacer(a, b);
+  }
+  if (2 > a.length) {
+    return this.addMapper(a, b);
+  }
+  this.matcher || (this.matcher = new Map());
+  this.matcher.set(a, b);
+  this.h += (this.h ? "|" : "") + a;
+  this.N = null;
+  this.cache && L(this);
+  return this;
+};
+u.addStemmer = function(a, b) {
+  this.stemmer || (this.stemmer = new Map());
+  this.stemmer.set(a, b);
+  this.A += (this.A ? "|" : "") + a;
+  this.O = null;
+  this.cache && L(this);
+  return this;
+};
+u.addFilter = function(a) {
+  this.filter || (this.filter = new Set());
+  this.filter.add(a);
+  this.cache && L(this);
+  return this;
+};
+u.addMapper = function(a, b) {
+  if ("object" === typeof a) {
+    return this.addReplacer(a, b);
+  }
+  if (1 < a.length) {
+    return this.addMatcher(a, b);
+  }
+  this.mapper || (this.mapper = new Map());
+  this.mapper.set(a, b);
+  this.cache && L(this);
+  return this;
+};
+u.addReplacer = function(a, b) {
+  "string" === typeof a && (a = new RegExp(a, "g"));
+  this.replacer || (this.replacer = []);
+  this.replacer.push(a, b || "");
+  this.cache && L(this);
+  return this;
+};
+function L(a) {
+  a.H.clear();
+  a.I.clear();
+}
+u.encode = function(a) {
+  if (this.cache && a.length <= this.B) {
     if (this.L) {
       if (this.H.has(a)) {
         return this.H.get(a);
@@ -170,8 +222,8 @@ K.prototype.encode = function(a) {
   this.numeric && 3 < a.length && (a = a.replace(ha, "$1 $2").replace(ia, "$1 $2").replace(fa, "$1 "));
   const b = !(this.dedupe || this.mapper || this.filter || this.matcher || this.stemmer || this.replacer);
   let c = [], d = this.split || "" === this.split ? a.split(this.split) : a;
-  for (let f = 0, g, h; f < d.length; f++) {
-    if (!(g = h = d[f])) {
+  for (let f = 0, g, k; f < d.length; f++) {
+    if (!(g = k = d[f])) {
       continue;
     }
     if (g.length < this.minlength) {
@@ -184,9 +236,9 @@ K.prototype.encode = function(a) {
     if (this.filter && this.filter.has(g)) {
       continue;
     }
-    if (this.cache && g.length <= this.A) {
+    if (this.cache && g.length <= this.M) {
       if (this.L) {
-        var e = this.J.get(g);
+        var e = this.I.get(g);
         if (e || "" === e) {
           e && c.push(e);
           continue;
@@ -195,33 +247,33 @@ K.prototype.encode = function(a) {
         this.L = setTimeout(ka, 50, this);
       }
     }
-    let k;
-    this.stemmer && 2 < g.length && (this.P || (this.P = new RegExp("(?!^)(" + this.M + ")$")), g = g.replace(this.P, l => this.stemmer.get(l)), k = 1);
-    g && k && (g.length < this.minlength || this.filter && this.filter.has(g)) && (g = "");
+    let h;
+    this.stemmer && 2 < g.length && (this.O || (this.O = new RegExp("(?!^)(" + this.A + ")$")), g = g.replace(this.O, l => this.stemmer.get(l)), h = 1);
+    g && h && (g.length < this.minlength || this.filter && this.filter.has(g)) && (g = "");
     if (g && (this.mapper || this.dedupe && 1 < g.length)) {
       e = "";
-      for (let l = 0, m = "", p, n; l < g.length; l++) {
-        p = g.charAt(l), p === m && this.dedupe || ((n = this.mapper && this.mapper.get(p)) || "" === n ? n === m && this.dedupe || !(m = n) || (e += n) : e += m = p);
+      for (let l = 0, m = "", q, n; l < g.length; l++) {
+        q = g.charAt(l), q === m && this.dedupe || ((n = this.mapper && this.mapper.get(q)) || "" === n ? n === m && this.dedupe || !(m = n) || (e += n) : e += m = q);
       }
       g = e;
     }
-    this.matcher && 1 < g.length && (this.O || (this.O = new RegExp("(" + this.B + ")", "g")), g = g.replace(this.O, l => this.matcher.get(l)));
+    this.matcher && 1 < g.length && (this.N || (this.N = new RegExp("(" + this.h + ")", "g")), g = g.replace(this.N, l => this.matcher.get(l)));
     if (g && this.replacer) {
       for (e = 0; g && e < this.replacer.length; e += 2) {
         g = g.replace(this.replacer[e], this.replacer[e + 1]);
       }
     }
-    this.cache && h.length <= this.A && (this.J.set(h, g), this.J.size > this.S && (this.J.clear(), this.A = this.A / 1.1 | 0));
+    this.cache && k.length <= this.M && (this.I.set(k, g), this.I.size > this.S && (this.I.clear(), this.M = this.M / 1.1 | 0));
     g && c.push(g);
   }
   this.finalize && (c = this.finalize(c) || c);
-  this.cache && a.length <= this.h && (this.H.set(a, c), this.H.size > this.S && (this.H.clear(), this.h = this.h / 1.1 | 0));
+  this.cache && a.length <= this.B && (this.H.set(a, c), this.H.size > this.S && (this.H.clear(), this.B = this.B / 1.1 | 0));
   return c;
 };
 function ka(a) {
   a.L = null;
   a.H.clear();
-  a.J.clear();
+  a.I.clear();
 }
 ;async function la(a) {
   a = a.data;
@@ -231,32 +283,31 @@ function ka(a) {
   switch(d) {
     case "init":
       d = a.options || {};
-      (b = d.config) && (d = b);
-      (b = a.factory) ? (Function("return " + b)()(self), self._index = new self.FlexSearch.Index(d), delete self.FlexSearch) : self._index = new L(d);
+      (b = a.factory) ? (Function("return " + b)()(self), self._index = new self.FlexSearch.Index(d), delete self.FlexSearch) : self._index = new M(d);
       postMessage({id:a.id});
       break;
     default:
       a = a.id, b = b[d].apply(b, c), postMessage("search" === d ? {id:a, msg:b} : {id:a});
   }
 }
-;let M = 0;
+;let ma = 0;
 function N(a = {}) {
   function b(g) {
-    function h(k) {
-      k = k.data || k;
-      const l = k.id, m = l && e.h[l];
-      m && (m(k.msg), delete e.h[l]);
+    function k(h) {
+      h = h.data || h;
+      const l = h.id, m = l && e.h[l];
+      m && (m(h.msg), delete e.h[l]);
     }
     this.worker = g;
-    this.h = B();
+    this.h = C();
     if (this.worker) {
-      d ? this.worker.on("message", h) : this.worker.onmessage = h;
+      d ? this.worker.on("message", k) : this.worker.onmessage = k;
       if (a.config) {
-        return new Promise(function(k) {
-          e.h[++M] = function() {
-            k(e);
+        return new Promise(function(h) {
+          e.h[++ma] = function() {
+            h(e);
           };
-          e.worker.postMessage({id:M, task:"init", factory:c, options:a});
+          e.worker.postMessage({id:ma, task:"init", factory:c, options:a});
         });
       }
       this.worker.postMessage({task:"init", factory:c, options:a});
@@ -268,7 +319,7 @@ function N(a = {}) {
   }
   let c = "undefined" !== typeof self ? self._factory : "undefined" !== typeof window ? window._factory : null;
   c && (c = c.toString());
-  const d = "undefined" === typeof window, e = this, f = ma(c, d, a.worker);
+  const d = "undefined" === typeof window, e = this, f = na(c, d, a.worker);
   return f.then ? f.then(function(g) {
     return b.call(e, g);
   }) : b.call(this, f);
@@ -285,17 +336,17 @@ function O(a) {
     let e;
     "function" === typeof d && (e = d, c.splice(c.length - 1, 1));
     d = new Promise(function(f) {
-      b.h[++M] = f;
-      b.worker.postMessage({task:a, id:M, args:c});
+      b.h[++ma] = f;
+      b.worker.postMessage({task:a, id:ma, args:c});
     });
     return e ? (d.then(e), this) : d;
   };
 }
-function ma(a, b, c) {
+function na(a, b, c) {
   return b ? "undefined" !== typeof module ? new (require("worker_threads")["Worker"])(__dirname + "/node/node.js") : import("worker_threads").then(function(worker){ return new worker["Worker"](import.meta.dirname + "/node/node.mjs"); }) : a ? new window.Worker(URL.createObjectURL(new Blob(["onmessage=" + la.toString()], {type:"text/javascript"}))) : new window.Worker(G(c) ? c : import.meta.url.replace("/worker.js", "/worker/worker.js").replace("flexsearch.bundle.module.min.js", 
   "module/worker/worker.js"), {type:"module"});
 }
-;function na(a) {
+;function oa(a) {
   P.call(a, "add");
   P.call(a, "append");
   P.call(a, "search");
@@ -313,7 +364,7 @@ function P(a) {
     return b;
   };
 }
-;function oa(a, b = 0) {
+;function pa(a, b = 0) {
   let c = [], d = [];
   b && (b = 250000 / b * 5000 | 0);
   for (const e of a.entries()) {
@@ -322,30 +373,30 @@ function P(a) {
   d.length && c.push(d);
   return c;
 }
-function pa(a, b) {
+function qa(a, b) {
   b || (b = new Map());
   for (let c = 0, d; c < a.length; c++) {
     d = a[c], b.set(d[0], d[1]);
   }
   return b;
 }
-function qa(a, b = 0) {
+function ra(a, b = 0) {
   let c = [], d = [];
   b && (b = 250000 / b * 1000 | 0);
   for (const e of a.entries()) {
-    d.push([e[0], oa(e[1])[0]]), d.length === b && (c.push(d), d = []);
+    d.push([e[0], pa(e[1])[0]]), d.length === b && (c.push(d), d = []);
   }
   d.length && c.push(d);
   return c;
 }
-function ra(a, b) {
+function sa(a, b) {
   b || (b = new Map());
   for (let c = 0, d, e; c < a.length; c++) {
-    d = a[c], e = b.get(d[0]), b.set(d[0], pa(d[1], e));
+    d = a[c], e = b.get(d[0]), b.set(d[0], qa(d[1], e));
   }
   return b;
 }
-function sa(a) {
+function ta(a) {
   let b = [], c = [];
   for (const d of a.keys()) {
     c.push(d), 250000 === c.length && (b.push(c), c = []);
@@ -353,36 +404,36 @@ function sa(a) {
   c.length && b.push(c);
   return b;
 }
-function ta(a, b) {
+function ua(a, b) {
   b || (b = new Set());
   for (let c = 0; c < a.length; c++) {
     b.add(a[c]);
   }
   return b;
 }
-function ua(a, b, c, d, e, f, g = 0) {
-  const h = d && d.constructor === Array;
-  var k = h ? d.shift() : d;
-  if (!k) {
+function va(a, b, c, d, e, f, g = 0) {
+  const k = d && d.constructor === Array;
+  var h = k ? d.shift() : d;
+  if (!h) {
     return this.export(a, b, e, f + 1);
   }
-  if ((k = a((b ? b + "." : "") + (g + 1) + "." + c, JSON.stringify(k))) && k.then) {
+  if ((h = a((b ? b + "." : "") + (g + 1) + "." + c, JSON.stringify(h))) && h.then) {
     const l = this;
-    return k.then(function() {
-      return ua.call(l, a, b, c, h ? d : null, e, f, g + 1);
+    return h.then(function() {
+      return va.call(l, a, b, c, k ? d : null, e, f, g + 1);
     });
   }
-  return ua.call(this, a, b, c, h ? d : null, e, f, g + 1);
+  return va.call(this, a, b, c, k ? d : null, e, f, g + 1);
 }
-;function va(a, b, c, d) {
+;function wa(a, b, c, d) {
   let e = [];
   for (let f = 0, g; f < a.index.length; f++) {
     if (g = a.index[f], b >= g.length) {
       b -= g.length;
     } else {
       b = g[d ? "splice" : "slice"](b, c);
-      const h = b.length;
-      if (h && (e = e.length ? e.concat(b) : b, c -= h, d && (a.length -= h), !c)) {
+      const k = b.length;
+      if (k && (e = e.length ? e.concat(b) : b, c -= k, d && (a.length -= k), !c)) {
         break;
       }
       b = 0;
@@ -417,13 +468,13 @@ function Q(a) {
     if ("indexOf" === d) {
       return function(e) {
         let f = 0;
-        for (let g = 0, h, k; g < b.index.length; g++) {
-          h = b.index[g];
-          k = h.indexOf(e);
-          if (0 <= k) {
-            return f + k;
+        for (let g = 0, k, h; g < b.index.length; g++) {
+          k = b.index[g];
+          h = k.indexOf(e);
+          if (0 <= h) {
+            return f + h;
           }
-          f += h.length;
+          f += k.length;
         }
         return -1;
       };
@@ -440,12 +491,12 @@ function Q(a) {
     }
     if ("slice" === d) {
       return function(e, f) {
-        return va(b, e || 0, f || b.length, !1);
+        return wa(b, e || 0, f || b.length, !1);
       };
     }
     if ("splice" === d) {
       return function(e, f) {
-        return va(b, e || 0, f || b.length, !0);
+        return wa(b, e || 0, f || b.length, !0);
       };
     }
     if ("constructor" === d) {
@@ -473,10 +524,10 @@ function R(a = 8) {
   if (!this) {
     return new R(a);
   }
-  this.index = B();
+  this.index = C();
   this.B = [];
   this.size = 0;
-  32 < a ? (this.h = wa, this.A = BigInt(a)) : (this.h = xa, this.A = a);
+  32 < a ? (this.h = xa, this.A = BigInt(a)) : (this.h = ya, this.A = a);
 }
 R.prototype.get = function(a) {
   const b = this.index[this.h(a)];
@@ -491,51 +542,51 @@ function S(a = 8) {
   if (!this) {
     return new S(a);
   }
-  this.index = B();
+  this.index = C();
   this.h = [];
-  32 < a ? (this.B = wa, this.A = BigInt(a)) : (this.B = xa, this.A = a);
+  32 < a ? (this.B = xa, this.A = BigInt(a)) : (this.B = ya, this.A = a);
 }
 S.prototype.add = function(a) {
   var b = this.B(a);
   let c = this.index[b];
   c ? (b = c.size, c.add(a), (b -= c.size) && this.size++) : (this.index[b] = c = new Set([a]), this.h.push(c));
 };
-v = R.prototype;
-v.has = S.prototype.has = function(a) {
+u = R.prototype;
+u.has = S.prototype.has = function(a) {
   const b = this.index[this.B(a)];
   return b && b.has(a);
 };
-v.delete = S.prototype.delete = function(a) {
+u.delete = S.prototype.delete = function(a) {
   const b = this.index[this.B(a)];
   b && b.delete(a) && this.size--;
 };
-v.clear = S.prototype.clear = function() {
-  this.index = B();
+u.clear = S.prototype.clear = function() {
+  this.index = C();
   this.h = [];
   this.size = 0;
 };
-v.values = S.prototype.values = function*() {
+u.values = S.prototype.values = function*() {
   for (let a = 0; a < this.h.length; a++) {
     for (let b of this.h[a].values()) {
       yield b;
     }
   }
 };
-v.keys = S.prototype.keys = function*() {
+u.keys = S.prototype.keys = function*() {
   for (let a = 0; a < this.h.length; a++) {
     for (let b of this.h[a].keys()) {
       yield b;
     }
   }
 };
-v.entries = S.prototype.entries = function*() {
+u.entries = S.prototype.entries = function*() {
   for (let a = 0; a < this.h.length; a++) {
     for (let b of this.h[a].entries()) {
       yield b;
     }
   }
 };
-function xa(a) {
+function ya(a) {
   let b = 2 ** this.A - 1;
   if ("number" == typeof a) {
     return a & b;
@@ -546,7 +597,7 @@ function xa(a) {
   }
   return 32 === this.A ? c + 2 ** 31 : c;
 }
-function wa(a) {
+function xa(a) {
   let b = BigInt(2) ** this.A - BigInt(1);
   var c = typeof a;
   if ("bigint" === c) {
@@ -568,30 +619,30 @@ function wa(a) {
     if (!c && this.reg.has(a)) {
       return this.update(a, b);
     }
-    for (let h = 0, k; h < this.field.length; h++) {
-      k = this.D[h];
-      var d = this.index.get(this.field[h]);
-      if ("function" === typeof k) {
-        var e = k(b);
+    for (let k = 0, h; k < this.field.length; k++) {
+      h = this.D[k];
+      var d = this.index.get(this.field[k]);
+      if ("function" === typeof h) {
+        var e = h(b);
         e && d.add(a, e, !1, !0);
       } else {
-        if (e = k.I, !e || e(b)) {
-          k.constructor === String ? k = ["" + k] : G(k) && (k = [k]), ya(b, k, this.K, 0, d, a, k[0], c);
+        if (e = h.J, !e || e(b)) {
+          h.constructor === String ? h = ["" + h] : G(h) && (h = [h]), za(b, h, this.K, 0, d, a, h[0], c);
         }
       }
     }
     if (this.tag) {
       for (d = 0; d < this.G.length; d++) {
-        var f = this.G[d], g = this.N[d];
+        var f = this.G[d], g = this.P[d];
         e = this.tag.get(g);
-        let h = B();
+        let k = C();
         if ("function" === typeof f) {
           if (f = f(b), !f) {
             continue;
           }
         } else {
-          const k = f.I;
-          if (k && !k(b)) {
+          const h = f.J;
+          if (h && !h(b)) {
             continue;
           }
           f.constructor === String && (f = "" + f);
@@ -599,13 +650,13 @@ function wa(a) {
         }
         if (e && f) {
           G(f) && (f = [f]);
-          for (let k = 0, l, m; k < f.length; k++) {
-            if (l = f[k], !h[l] && (h[l] = 1, (g = e.get(l)) ? m = g : e.set(l, m = []), !c || !m.includes(a))) {
+          for (let h = 0, l, m; h < f.length; h++) {
+            if (l = f[h], !k[l] && (k[l] = 1, (g = e.get(l)) ? m = g : e.set(l, m = []), !c || !m.includes(a))) {
               if (m.length === 2 ** 31 - 1) {
                 g = new Q(m);
                 if (this.fastupdate) {
-                  for (let p of this.reg.values()) {
-                    p.includes(m) && (p[p.indexOf(m)] = g);
+                  for (let q of this.reg.values()) {
+                    q.includes(m) && (q[q.indexOf(m)] = g);
                   }
                 }
                 e.set(l, m = g);
@@ -620,12 +671,12 @@ function wa(a) {
       }
     }
     if (this.store && (!c || !this.store.has(a))) {
-      let h;
+      let k;
       if (this.C) {
-        h = B();
-        for (let k = 0, l; k < this.C.length; k++) {
-          l = this.C[k];
-          if ((c = l.I) && !c(b)) {
+        k = C();
+        for (let h = 0, l; h < this.C.length; h++) {
+          l = this.C[h];
+          if ((c = l.J) && !c(b)) {
             continue;
           }
           let m;
@@ -636,32 +687,32 @@ function wa(a) {
             }
             l = [l.U];
           } else if (G(l) || l.constructor === String) {
-            h[l] = b[l];
+            k[l] = b[l];
             continue;
           }
-          za(b, h, l, 0, l[0], m);
+          Aa(b, k, l, 0, l[0], m);
         }
       }
-      this.store.set(a, h || b);
+      this.store.set(a, k || b);
     }
   }
   return this;
 };
-function za(a, b, c, d, e, f) {
+function Aa(a, b, c, d, e, f) {
   a = a[e];
   if (d === c.length - 1) {
     b[e] = f || a;
   } else if (a) {
     if (a.constructor === Array) {
       for (b = b[e] = Array(a.length), e = 0; e < a.length; e++) {
-        za(a, b, c, d, e);
+        Aa(a, b, c, d, e);
       }
     } else {
-      b = b[e] || (b[e] = B()), e = c[++d], za(a, b, c, d, e);
+      b = b[e] || (b[e] = C()), e = c[++d], Aa(a, b, c, d, e);
     }
   }
 }
-function ya(a, b, c, d, e, f, g, h) {
+function za(a, b, c, d, e, f, g, k) {
   if (a = a[g]) {
     if (d === b.length - 1) {
       if (a.constructor === Array) {
@@ -673,51 +724,51 @@ function ya(a, b, c, d, e, f, g, h) {
         }
         a = a.join(" ");
       }
-      e.add(f, a, h, !0);
+      e.add(f, a, k, !0);
     } else {
       if (a.constructor === Array) {
         for (g = 0; g < a.length; g++) {
-          ya(a, b, c, d, e, f, g, h);
+          za(a, b, c, d, e, f, g, k);
         }
       } else {
-        g = b[++d], ya(a, b, c, d, e, f, g, h);
+        g = b[++d], za(a, b, c, d, e, f, g, k);
       }
     }
   } else {
     e.db && e.remove(f);
   }
 }
-;function Aa(a, b, c, d, e, f, g) {
-  const h = a.length;
-  let k = [], l;
+;function Ba(a, b, c, d, e, f, g) {
+  const k = a.length;
+  let h = [], l;
   var m;
-  l = B();
-  for (let p = 0, n, q, t, r; p < b; p++) {
-    for (let u = 0; u < h; u++) {
-      if (t = a[u], p < t.length && (n = t[p])) {
+  l = C();
+  for (let q = 0, n, p, t, r; q < b; q++) {
+    for (let w = 0; w < k; w++) {
+      if (t = a[w], q < t.length && (n = t[q])) {
         for (let x = 0; x < n.length; x++) {
-          q = n[x], (m = l[q]) ? l[q]++ : (m = 0, l[q] = 1), r = k[m] || (k[m] = []), g || (m = p + (u ? 0 : f || 0), r = r[m] || (r[m] = [])), r.push(q);
+          p = n[x], (m = l[p]) ? l[p]++ : (m = 0, l[p] = 1), r = h[m] || (h[m] = []), g || (m = q + (w ? 0 : f || 0), r = r[m] || (r[m] = [])), r.push(p);
         }
       }
     }
   }
-  if (a = k.length) {
+  if (a = h.length) {
     if (e) {
-      k = 1 < k.length ? Ba(k, d, c, g, 0) : (k = k[0]).length > c || d ? k.slice(d, c + d) : k;
+      h = 1 < h.length ? Ca(h, d, c, g, 0) : (h = h[0]).length > c || d ? h.slice(d, c + d) : h;
     } else {
-      if (a < h) {
+      if (a < k) {
         return [];
       }
-      k = k[a - 1];
+      h = h[a - 1];
       if (c || d) {
         if (g) {
-          if (k.length > c || d) {
-            k = k.slice(d, c + d);
+          if (h.length > c || d) {
+            h = h.slice(d, c + d);
           }
         } else {
           e = [];
-          for (let p = 0, n; p < k.length; p++) {
-            if (n = k[p], n.length > d) {
+          for (let q = 0, n; q < h.length; q++) {
+            if (n = h[q], n.length > d) {
               d -= n.length;
             } else {
               if (n.length > c || d) {
@@ -729,26 +780,26 @@ function ya(a, b, c, d, e, f, g, h) {
               }
             }
           }
-          k = 1 < e.length ? [].concat.apply([], e) : e[0];
+          h = 1 < e.length ? [].concat.apply([], e) : e[0];
         }
       }
     }
   }
-  return k;
+  return h;
 }
-function Ba(a, b, c, d, e) {
-  const f = [], g = B();
-  let h;
-  var k = a.length;
+function Ca(a, b, c, d, e) {
+  const f = [], g = C();
+  let k;
+  var h = a.length;
   let l, m = 0;
   if (d) {
-    for (e = k - 1; 0 <= e; e--) {
-      for (d = a[e], l = d.length, k = 0; k < l; k++) {
-        if (h = d[k], !g[h]) {
-          if (g[h] = 1, b) {
+    for (e = h - 1; 0 <= e; e--) {
+      for (d = a[e], l = d.length, h = 0; h < l; h++) {
+        if (k = d[h], !g[k]) {
+          if (g[k] = 1, b) {
             b--;
           } else {
-            if (f.push(h), f.length === c) {
+            if (f.push(k), f.length === c) {
               return f;
             }
           }
@@ -756,17 +807,17 @@ function Ba(a, b, c, d, e) {
       }
     }
   } else {
-    let p = ca(a);
-    for (let n = 0; n < p; n++) {
-      for (let q = k - 1; 0 <= q; q--) {
-        if (l = (d = a[q][n]) && d.length) {
+    let q = ca(a);
+    for (let n = 0; n < q; n++) {
+      for (let p = h - 1; 0 <= p; p--) {
+        if (l = (d = a[p][n]) && d.length) {
           for (let t = 0; t < l; t++) {
-            if (h = d[t], !g[h]) {
-              if (g[h] = 1, b) {
+            if (k = d[t], !g[k]) {
+              if (g[k] = 1, b) {
                 b--;
               } else {
-                let r = n + (q < k - 1 ? e || 0 : 0);
-                (f[r] || (f[r] = [])).push(h);
+                let r = n + (p < h - 1 ? e || 0 : 0);
+                (f[r] || (f[r] = [])).push(k);
                 if (++m === c) {
                   return f;
                 }
@@ -779,8 +830,8 @@ function Ba(a, b, c, d, e) {
   }
   return f;
 }
-function Ca(a, b) {
-  const c = B(), d = [];
+function Da(a, b) {
+  const c = C(), d = [];
   for (let e = 0, f; e < b.length; e++) {
     f = b[e];
     for (let g = 0; g < f.length; g++) {
@@ -795,48 +846,48 @@ function Ca(a, b) {
 ;T.prototype.search = function(a, b, c, d) {
   c || (!b && H(a) ? (c = a, a = "") : H(b) && (c = b, b = 0));
   let e = [], f = [], g;
-  let h;
   let k;
-  let l, m = 0, p;
+  let h;
+  let l, m = 0, q;
   if (c) {
     c.constructor === Array && (c = {index:c});
     a = c.query || a;
     g = c.pluck;
-    h = c.merge;
-    k = g || c.field || c.index;
+    k = c.merge;
+    h = g || c.field || c.index;
     var n = this.tag && c.tag;
-    var q = this.store && c.enrich;
+    var p = this.store && c.enrich;
     var t = c.suggest;
-    p = c.highlight;
+    q = c.highlight;
     b = c.limit || b;
     l = c.offset || 0;
     b || (b = 100);
     if (n && (!this.db || !d)) {
       n.constructor !== Array && (n = [n]);
       var r = [];
-      for (let y = 0, w; y < n.length; y++) {
-        w = n[y];
-        if (G(w)) {
+      for (let y = 0, v; y < n.length; y++) {
+        v = n[y];
+        if (G(v)) {
           throw Error("A tag option can't be a string, instead it needs a { field: tag } format.");
         }
-        if (w.field && w.tag) {
-          var u = w.tag;
-          if (u.constructor === Array) {
-            for (var x = 0; x < u.length; x++) {
-              r.push(w.field, u[x]);
+        if (v.field && v.tag) {
+          var w = v.tag;
+          if (w.constructor === Array) {
+            for (var x = 0; x < w.length; x++) {
+              r.push(v.field, w[x]);
             }
           } else {
-            r.push(w.field, u);
+            r.push(v.field, w);
           }
         } else {
-          u = Object.keys(w);
-          for (let A = 0, I, C; A < u.length; A++) {
-            if (I = u[A], C = w[I], C.constructor === Array) {
-              for (x = 0; x < C.length; x++) {
-                r.push(I, C[x]);
+          w = Object.keys(v);
+          for (let A = 0, I, D; A < w.length; A++) {
+            if (I = w[A], D = v[I], D.constructor === Array) {
+              for (x = 0; x < D.length; x++) {
+                r.push(I, D[x]);
               }
             } else {
-              r.push(I, C);
+              r.push(I, D);
             }
           }
         }
@@ -855,61 +906,61 @@ function Ca(a, b) {
                 console.warn("Tag '" + r[n] + ":" + r[n + 1] + "' will be skipped because there is no field '" + r[n] + "'.");
                 continue;
               }
-              t.push(d = d.db.tag(r[n + 1], b, l, q));
+              t.push(d = d.db.tag(r[n + 1], b, l, p));
             } else {
-              d = Da.call(this, r[n], r[n + 1], b, l, q);
+              d = Ea.call(this, r[n], r[n + 1], b, l, p);
             }
             e.push({field:r[n], tag:r[n + 1], result:d});
           }
         }
         return t.length ? Promise.all(t).then(function(y) {
-          for (let w = 0; w < y.length; w++) {
-            e[w].result = y[w];
+          for (let v = 0; v < y.length; v++) {
+            e[v].result = y[v];
           }
           return e;
         }) : e;
       }
     }
-    G(k) && (k = [k]);
+    G(h) && (h = [h]);
   }
-  k || (k = this.field);
+  h || (h = this.field);
   r = !d && (this.worker || this.db) && [];
-  let D;
-  for (let y = 0, w, A, I; y < k.length; y++) {
-    A = k[y];
+  let B;
+  for (let y = 0, v, A, I; y < h.length; y++) {
+    A = h[y];
     if (this.db && this.tag && !this.D[y]) {
       continue;
     }
-    let C;
-    G(A) || (C = A, A = C.field, a = C.query || a, b = C.limit || b, l = C.offset || l, t = C.suggest || t, q = this.store && (C.enrich || q));
+    let D;
+    G(A) || (D = A, A = D.field, a = D.query || a, b = D.limit || b, l = D.offset || l, t = D.suggest || t, p = this.store && (D.enrich || p));
     if (d) {
-      w = d[y];
+      v = d[y];
     } else {
-      if (u = C || c, x = this.index.get(A), n && (this.db && (u.tag = n, D = x.db.support_tag_search, u.field = k), D || (u.enrich = !1)), r) {
-        r[y] = x.search(a, b, u);
-        u && q && (u.enrich = q);
+      if (w = D || c, x = this.index.get(A), n && (this.db && (w.tag = n, B = x.db.support_tag_search, w.field = h), B || (w.enrich = !1)), r) {
+        r[y] = x.search(a, b, w);
+        w && p && (w.enrich = p);
         continue;
       } else {
-        w = x.search(a, b, u), u && q && (u.enrich = q);
+        v = x.search(a, b, w), w && p && (w.enrich = p);
       }
     }
-    I = w && w.length;
+    I = v && v.length;
     if (n && I) {
-      u = [];
+      w = [];
       x = 0;
       if (this.db && d) {
-        if (!D) {
-          for (let E = k.length; E < d.length; E++) {
+        if (!B) {
+          for (let E = h.length; E < d.length; E++) {
             let F = d[E];
             if (F && F.length) {
-              x++, u.push(F);
+              x++, w.push(F);
             } else if (!t) {
               return e;
             }
           }
         }
       } else {
-        for (let E = 0, F, fb; E < n.length; E += 2) {
+        for (let E = 0, F, gb; E < n.length; E += 2) {
           F = this.tag.get(n[E]);
           if (!F) {
             if (console.warn("Tag '" + n[E] + ":" + n[E + 1] + "' will be skipped because there is no field '" + n[E] + "'."), t) {
@@ -918,16 +969,16 @@ function Ca(a, b) {
               return e;
             }
           }
-          if (fb = (F = F && F.get(n[E + 1])) && F.length) {
-            x++, u.push(F);
+          if (gb = (F = F && F.get(n[E + 1])) && F.length) {
+            x++, w.push(F);
           } else if (!t) {
             return e;
           }
         }
       }
       if (x) {
-        w = Ca(w, u);
-        I = w.length;
+        v = Da(v, w);
+        I = v.length;
         if (!I && !t) {
           return e;
         }
@@ -935,84 +986,84 @@ function Ca(a, b) {
       }
     }
     if (I) {
-      f[m] = A, e.push(w), m++;
-    } else if (1 === k.length) {
+      f[m] = A, e.push(v), m++;
+    } else if (1 === h.length) {
       return e;
     }
   }
   if (r) {
-    if (this.db && n && n.length && !D) {
-      for (q = 0; q < n.length; q += 2) {
-        d = this.index.get(n[q]);
+    if (this.db && n && n.length && !B) {
+      for (p = 0; p < n.length; p += 2) {
+        d = this.index.get(n[p]);
         if (!d) {
-          if (console.warn("Tag '" + n[q] + ":" + n[q + 1] + "' was not found because there is no field '" + n[q] + "'."), t) {
+          if (console.warn("Tag '" + n[p] + ":" + n[p + 1] + "' was not found because there is no field '" + n[p] + "'."), t) {
             continue;
           } else {
             return e;
           }
         }
-        r.push(d.db.tag(n[q + 1], b, l, !1));
+        r.push(d.db.tag(n[p + 1], b, l, !1));
       }
     }
     const y = this;
-    return Promise.all(r).then(function(w) {
-      return w.length ? y.search(a, b, c, w) : w;
+    return Promise.all(r).then(function(v) {
+      return v.length ? y.search(a, b, c, v) : v;
     });
   }
   if (!m) {
     return e;
   }
-  if (g && (!q || !this.store)) {
+  if (g && (!p || !this.store)) {
     return e[0];
   }
   r = [];
-  for (let y = 0, w; y < f.length; y++) {
-    w = e[y];
-    q && w.length && !w[0].doc && (this.db ? r.push(w = this.index.get(this.field[0]).db.enrich(w)) : w.length && (w = Ea.call(this, w)));
+  for (let y = 0, v; y < f.length; y++) {
+    v = e[y];
+    p && v.length && !v[0].doc && (this.db ? r.push(v = this.index.get(this.field[0]).db.enrich(v)) : v.length && (v = Fa.call(this, v)));
     if (g) {
-      return w;
+      return v;
     }
-    e[y] = {field:f[y], result:w};
+    e[y] = {field:f[y], result:v};
   }
-  if (q && this.db && r.length) {
+  if (p && this.db && r.length) {
     const y = this;
-    return Promise.all(r).then(function(w) {
-      for (let A = 0; A < w.length; A++) {
-        e[A].result = w[A];
+    return Promise.all(r).then(function(v) {
+      for (let A = 0; A < v.length; A++) {
+        e[A].result = v[A];
       }
-      return h ? Fa(e, b) : p ? Ga(e, a, y.index, y.field, y.D, p) : e;
+      return k ? Ga(e, b) : q ? Ha(e, a, y.index, y.field, y.D, q) : e;
     });
   }
-  return h ? Fa(e, b) : p ? Ga(e, a, this.index, this.field, this.D, p) : e;
+  return k ? Ga(e, b) : q ? Ha(e, a, this.index, this.field, this.D, q) : e;
 };
-function Ga(a, b, c, d, e, f) {
-  let g, h, k;
-  for (let m = 0, p, n, q, t, r; m < a.length; m++) {
-    p = a[m].result;
+function Ha(a, b, c, d, e, f) {
+  let g, k, h;
+  for (let m = 0, q, n, p, t, r; m < a.length; m++) {
+    q = a[m].result;
     n = a[m].field;
     t = c.get(n);
-    q = t.encoder;
-    k = t.tokenize;
+    p = t.encoder;
+    h = t.tokenize;
     r = e[d.indexOf(n)];
-    q !== g && (g = q, h = g.encode(b));
-    for (let u = 0; u < p.length; u++) {
+    p !== g && (g = p, k = g.encode(b));
+    for (let w = 0; w < q.length; w++) {
       let x = "";
-      var l = J(p[u].doc, r);
-      let D = g.encode(l);
+      var l = J(q[w].doc, r);
+      let B = g.encode(l);
       l = l.split(g.split);
-      for (let y = 0, w, A; y < D.length; y++) {
-        w = D[y];
+      for (let y = 0, v, A; y < B.length; y++) {
+        v = B[y];
         A = l[y];
         let I;
-        for (let C = 0, E; C < h.length; C++) {
-          if (E = h[C], "strict" === k) {
-            if (w === E) {
+        for (let D = 0, E; D < k.length; D++) {
+          if (E = k[D], "strict" === h) {
+            if (v === E) {
               x += (x ? " " : "") + f.replace("$1", A);
               I = !0;
               break;
             }
           } else {
-            const F = w.indexOf(E);
+            const F = v.indexOf(E);
             if (-1 < F) {
               x += (x ? " " : "") + A.substring(0, F) + f.replace("$1", A.substring(F, E.length)) + A.substring(F + E.length);
               I = !0;
@@ -1022,31 +1073,31 @@ function Ga(a, b, c, d, e, f) {
         }
         I || (x += (x ? " " : "") + l[y]);
       }
-      p[u].highlight = x;
+      q[w].highlight = x;
     }
   }
   return a;
 }
-function Fa(a, b) {
-  const c = [], d = B();
+function Ga(a, b) {
+  const c = [], d = C();
   for (let e = 0, f, g; e < a.length; e++) {
     f = a[e];
     g = f.result;
-    for (let h = 0, k, l, m; h < g.length; h++) {
-      if (l = g[h], k = l.id, m = d[k]) {
+    for (let k = 0, h, l, m; k < g.length; k++) {
+      if (l = g[k], h = l.id, m = d[h]) {
         m.push(f.field);
       } else {
         if (c.length === b) {
           return c;
         }
-        l.field = d[k] = [f.field];
+        l.field = d[h] = [f.field];
         c.push(l);
       }
     }
   }
   return c;
 }
-function Da(a, b, c, d, e) {
+function Ea(a, b, c, d, e) {
   let f = this.tag.get(a);
   if (!f) {
     return console.warn("Tag '" + a + "' was not found"), [];
@@ -1055,11 +1106,11 @@ function Da(a, b, c, d, e) {
     if (a > c || d) {
       f = f.slice(d, d + c);
     }
-    e && (f = Ea.call(this, f));
+    e && (f = Fa.call(this, f));
     return f;
   }
 }
-function Ea(a) {
+function Fa(a) {
   const b = Array(a.length);
   for (let c = 0, d; c < a.length; c++) {
     d = a[c], b[c] = {id:d, doc:this.store.get(d)};
@@ -1075,29 +1126,29 @@ function Ea(a) {
   this.D = [];
   this.field = [];
   this.K = [];
-  this.key = (c = b.key || b.id) && Ha(c, this.K) || "id";
+  this.key = (c = b.key || b.id) && Ia(c, this.K) || "id";
   (d = a.keystore || 0) && (this.keystore = d);
   this.reg = (this.fastupdate = !!a.fastupdate) ? d ? new R(d) : new Map() : d ? new S(d) : new Set();
-  this.C = (c = b.store || null) && !0 !== c && [];
+  this.C = (c = b.store || null) && c && !0 !== c && [];
   this.store = c && (d ? new R(d) : new Map());
   this.cache = (c = a.cache || null) && new U(c);
   a.cache = !1;
   this.worker = a.worker;
-  this.index = Ia.call(this, a, b);
+  this.index = Ja.call(this, a, b);
   this.tag = null;
   if (c = b.tag) {
     if ("string" === typeof c && (c = [c]), c.length) {
       this.tag = new Map();
       this.G = [];
-      this.N = [];
+      this.P = [];
       for (let e = 0, f, g; e < c.length; e++) {
         f = c[e];
         g = f.field || f;
         if (!g) {
           throw Error("The tag field from the document descriptor is undefined.");
         }
-        f.custom ? this.G[e] = f.custom : (this.G[e] = Ha(g, this.K), f.filter && ("string" === typeof this.G[e] && (this.G[e] = new String(this.G[e])), this.G[e].I = f.filter));
-        this.N[e] = g;
+        f.custom ? this.G[e] = f.custom : (this.G[e] = Ia(g, this.K), f.filter && ("string" === typeof this.G[e] && (this.G[e] = new String(this.G[e])), this.G[e].J = f.filter));
+        this.P[e] = g;
         this.tag.set(g, new Map());
       }
     }
@@ -1111,9 +1162,9 @@ function Ea(a) {
       const e = this;
       return Promise.all(a).then(function(f) {
         let g = 0;
-        for (const h of e.index.entries()) {
-          const k = h[0];
-          h[1].then && e.index.set(k, f[g++]);
+        for (const k of e.index.entries()) {
+          const h = k[0];
+          k[1].then && e.index.set(h, f[g++]);
         }
         return e;
       });
@@ -1122,14 +1173,14 @@ function Ea(a) {
     a.db && this.mount(a.db);
   }
 }
-v = T.prototype;
-v.mount = function(a) {
+u = T.prototype;
+u.mount = function(a) {
   let b = this.field;
   if (this.tag) {
-    for (let e = 0, f; e < this.N.length; e++) {
-      f = this.N[e];
+    for (let e = 0, f; e < this.P.length; e++) {
+      f = this.P[e];
       var c = void 0;
-      this.index.set(f, c = new L({}, this.reg));
+      this.index.set(f, c = new M({}, this.reg));
       b === this.field && (b = b.slice(0));
       b.push(f);
       c.tag = this.tag.get(f);
@@ -1140,16 +1191,16 @@ v.mount = function(a) {
   for (let e = 0, f, g; e < b.length; e++) {
     d.field = g = b[e];
     f = this.index.get(g);
-    const h = new a.constructor(a.id, d);
-    h.id = a.id;
-    c[e] = h.mount(f);
+    const k = new a.constructor(a.id, d);
+    k.id = a.id;
+    c[e] = k.mount(f);
     f.document = !0;
     e ? f.bypass = !0 : f.store = this.store;
   }
   this.db = !0;
   return Promise.all(c);
 };
-v.commit = async function(a, b) {
+u.commit = async function(a, b) {
   const c = [];
   for (const d of this.index.values()) {
     c.push(d.db.commit(d, a, b));
@@ -1157,14 +1208,14 @@ v.commit = async function(a, b) {
   await Promise.all(c);
   this.reg.clear();
 };
-v.destroy = function() {
+u.destroy = function() {
   const a = [];
   for (const b of this.index.values()) {
     a.push(b.destroy());
   }
   return Promise.all(a);
 };
-function Ia(a, b) {
+function Ja(a, b) {
   const c = new Map();
   let d = b.index || b.field || b;
   G(d) && (d = [d]);
@@ -1173,23 +1224,23 @@ function Ia(a, b) {
     G(f) || (g = f, f = f.field);
     g = H(g) ? Object.assign({}, a, g) : a;
     if (this.worker) {
-      const h = new N(g);
-      c.set(f, h);
+      const k = new N(g);
+      c.set(f, k);
     }
-    this.worker || c.set(f, new L(g, this.reg));
-    g.custom ? this.D[e] = g.custom : (this.D[e] = Ha(f, this.K), g.filter && ("string" === typeof this.D[e] && (this.D[e] = new String(this.D[e])), this.D[e].I = g.filter));
+    this.worker || c.set(f, new M(g, this.reg));
+    g.custom ? this.D[e] = g.custom : (this.D[e] = Ia(f, this.K), g.filter && ("string" === typeof this.D[e] && (this.D[e] = new String(this.D[e])), this.D[e].J = g.filter));
     this.field[e] = f;
   }
   if (this.C) {
     a = b.store;
     G(a) && (a = [a]);
     for (let e = 0, f, g; e < a.length; e++) {
-      f = a[e], g = f.field || f, f.custom ? (this.C[e] = f.custom, f.custom.U = g) : (this.C[e] = Ha(g, this.K), f.filter && ("string" === typeof this.C[e] && (this.C[e] = new String(this.C[e])), this.C[e].I = f.filter));
+      f = a[e], g = f.field || f, f.custom ? (this.C[e] = f.custom, f.custom.U = g) : (this.C[e] = Ia(g, this.K), f.filter && ("string" === typeof this.C[e] && (this.C[e] = new String(this.C[e])), this.C[e].J = f.filter));
     }
   }
   return c;
 }
-function Ha(a, b) {
+function Ia(a, b) {
   const c = a.split(":");
   let d = 0;
   for (let e = 0; e < c.length; e++) {
@@ -1198,13 +1249,13 @@ function Ha(a, b) {
   d < c.length && (c.length = d);
   return 1 < d ? c : c[0];
 }
-v.append = function(a, b) {
+u.append = function(a, b) {
   return this.add(a, b, !0);
 };
-v.update = function(a, b) {
+u.update = function(a, b) {
   return this.remove(a).add(a, b);
 };
-v.remove = function(a) {
+u.remove = function(a) {
   H(a) && (a = J(a, this.key));
   for (var b of this.index.values()) {
     b.remove(a, !0);
@@ -1225,7 +1276,7 @@ v.remove = function(a) {
   this.cache && this.cache.remove(a);
   return this;
 };
-v.clear = function() {
+u.clear = function() {
   for (const a of this.index.values()) {
     a.clear();
   }
@@ -1237,32 +1288,32 @@ v.clear = function() {
   this.store && this.store.clear();
   return this;
 };
-v.contain = function(a) {
+u.contain = function(a) {
   return this.db ? this.index.get(this.field[0]).db.has(a) : this.reg.has(a);
 };
-v.cleanup = function() {
+u.cleanup = function() {
   for (const a of this.index.values()) {
     a.cleanup();
   }
   return this;
 };
-v.get = function(a) {
+u.get = function(a) {
   return this.db ? this.index.get(this.field[0]).db.enrich(a).then(function(b) {
     return b[0] && b[0].doc;
   }) : this.store.get(a);
 };
-v.set = function(a, b) {
+u.set = function(a, b) {
   this.store.set(a, b);
   return this;
 };
-v.searchCache = Ja;
-v.export = function(a, b, c = 0, d = 0) {
+u.searchCache = Ka;
+u.export = function(a, b, c = 0, d = 0) {
   if (c < this.field.length) {
     const g = this.field[c];
     if ((b = this.index.get(g).export(a, g, c, d = 1)) && b.then) {
-      const h = this;
+      const k = this;
       return b.then(function() {
-        return h.export(a, g, c + 1);
+        return k.export(a, g, c + 1);
       });
     }
     return this.export(a, g, c + 1);
@@ -1271,17 +1322,17 @@ v.export = function(a, b, c = 0, d = 0) {
   switch(d) {
     case 0:
       e = "reg";
-      f = sa(this.reg);
+      f = ta(this.reg);
       b = null;
       break;
     case 1:
       e = "tag";
-      f = qa(this.tag, this.reg.size);
+      f = ra(this.tag, this.reg.size);
       b = null;
       break;
     case 2:
       e = "doc";
-      f = oa(this.store);
+      f = pa(this.store);
       b = null;
       break;
     case 3:
@@ -1292,9 +1343,9 @@ v.export = function(a, b, c = 0, d = 0) {
     default:
       return;
   }
-  return ua.call(this, a, b, e, f, c, d);
+  return va.call(this, a, b, e, f, c, d);
 };
-v.import = function(a, b) {
+u.import = function(a, b) {
   if (b) {
     G(b) && (b = JSON.parse(b));
     a = a.split(".");
@@ -1307,21 +1358,21 @@ v.import = function(a, b) {
     switch(a) {
       case "reg":
         this.fastupdate = !1;
-        this.reg = ta(b, this.reg);
+        this.reg = ua(b, this.reg);
         for (let d = 0, e; d < this.field.length; d++) {
           e = this.index.get(this.field[d]), e.fastupdate = !1, e.reg = this.reg;
         }
         break;
       case "tag":
-        this.tag = ra(b, this.tag);
+        this.tag = sa(b, this.tag);
         break;
       case "doc":
-        this.store = pa(b, this.store);
+        this.store = qa(b, this.store);
     }
   }
 };
-na(T.prototype);
-function Ja(a, b, c) {
+oa(T.prototype);
+function Ka(a, b, c) {
   a = ("object" === typeof a ? "" + a.query : a).toLowerCase();
   let d = this.cache.get(a);
   if (!d) {
@@ -1361,78 +1412,78 @@ U.prototype.clear = function() {
   this.cache.clear();
   this.h = "";
 };
-const Ka = {normalize:function(a) {
+const La = {normalize:function(a) {
   return a.toLowerCase();
 }, dedupe:!1};
-const La = new Map([["b", "p"], ["v", "f"], ["w", "f"], ["z", "s"], ["x", "s"], ["d", "t"], ["n", "m"], ["c", "k"], ["g", "k"], ["j", "k"], ["q", "k"], ["i", "e"], ["y", "e"], ["u", "o"]]);
-const Ma = new Map([["ae", "a"], ["oe", "o"], ["sh", "s"], ["kh", "k"], ["th", "t"], ["pf", "f"]]), Na = [/([^aeo])h(.)/g, "$1$2", /([aeo])h([^aeo]|$)/g, "$1$2", /([^0-9])\1+/g, "$1"];
-const Oa = {a:"", e:"", i:"", o:"", u:"", y:"", b:1, f:1, p:1, v:1, c:2, g:2, j:2, k:2, q:2, s:2, x:2, z:2, "\u00df":2, d:3, t:3, l:4, m:5, n:5, r:6};
-const Pa = /[\x00-\x7F]+/g;
+const Ma = new Map([["b", "p"], ["v", "f"], ["w", "f"], ["z", "s"], ["x", "s"], ["d", "t"], ["n", "m"], ["c", "k"], ["g", "k"], ["j", "k"], ["q", "k"], ["i", "e"], ["y", "e"], ["u", "o"]]);
+const Na = new Map([["ae", "a"], ["oe", "o"], ["sh", "s"], ["kh", "k"], ["th", "t"], ["pf", "f"]]), Oa = [/([^aeo])h(.)/g, "$1$2", /([aeo])h([^aeo]|$)/g, "$1$2", /([^0-9])\1+/g, "$1"];
+const Pa = {a:"", e:"", i:"", o:"", u:"", y:"", b:1, f:1, p:1, v:1, c:2, g:2, j:2, k:2, q:2, s:2, x:2, z:2, "\u00df":2, d:3, t:3, l:4, m:5, n:5, r:6};
 const Qa = /[\x00-\x7F]+/g;
 const Ra = /[\x00-\x7F]+/g;
-var Sa = {LatinExact:{normalize:!1, dedupe:!1}, LatinDefault:Ka, LatinSimple:{normalize:!0, dedupe:!0}, LatinBalance:{normalize:!0, dedupe:!0, mapper:La}, LatinAdvanced:{normalize:!0, dedupe:!0, mapper:La, matcher:Ma, replacer:Na}, LatinExtra:{normalize:!0, dedupe:!0, mapper:La, replacer:Na.concat([/(?!^)[aeo]/g, ""]), matcher:Ma}, LatinSoundex:{normalize:!0, dedupe:!1, include:{letter:!0}, finalize:function(a) {
+const Sa = /[\x00-\x7F]+/g;
+var Ta = {LatinExact:{normalize:!1, dedupe:!1}, LatinDefault:La, LatinSimple:{normalize:!0, dedupe:!0}, LatinBalance:{normalize:!0, dedupe:!0, mapper:Ma}, LatinAdvanced:{normalize:!0, dedupe:!0, mapper:Ma, matcher:Na, replacer:Oa}, LatinExtra:{normalize:!0, dedupe:!0, mapper:Ma, replacer:Oa.concat([/(?!^)[aeo]/g, ""]), matcher:Na}, LatinSoundex:{normalize:!0, dedupe:!1, include:{letter:!0}, finalize:function(a) {
   for (let c = 0; c < a.length; c++) {
     var b = a[c];
-    let d = b.charAt(0), e = Oa[d];
-    for (let f = 1, g; f < b.length && (g = b.charAt(f), "h" === g || "w" === g || !(g = Oa[g]) || g === e || (d += g, e = g, 4 !== d.length)); f++) {
+    let d = b.charAt(0), e = Pa[d];
+    for (let f = 1, g; f < b.length && (g = b.charAt(f), "h" === g || "w" === g || !(g = Pa[g]) || g === e || (d += g, e = g, 4 !== d.length)); f++) {
     }
     a[c] = d;
   }
 }}, ArabicDefault:{rtl:!0, normalize:!1, dedupe:!0, prepare:function(a) {
-  return ("" + a).replace(Pa, " ");
+  return ("" + a).replace(Qa, " ");
 }}, CjkDefault:{normalize:!1, dedupe:!0, split:"", prepare:function(a) {
-  return ("" + a).replace(Qa, "");
+  return ("" + a).replace(Ra, "");
 }}, CyrillicDefault:{normalize:!1, dedupe:!0, prepare:function(a) {
-  return ("" + a).replace(Ra, " ");
+  return ("" + a).replace(Sa, " ");
 }}};
-const Ta = {memory:{resolution:1}, performance:{resolution:6, fastupdate:!0, context:{depth:1, resolution:3}}, match:{tokenize:"forward"}, score:{resolution:9, context:{depth:2, resolution:9}}};
-B();
-L.prototype.add = function(a, b, c, d) {
+const Ua = {memory:{resolution:1}, performance:{resolution:6, fastupdate:!0, context:{depth:1, resolution:3}}, match:{tokenize:"forward"}, score:{resolution:9, context:{depth:2, resolution:9}}};
+C();
+M.prototype.add = function(a, b, c, d) {
   if (b && (a || 0 === a)) {
     if (!d && !c && this.reg.has(a)) {
       return this.update(a, b);
     }
     b = this.encoder.encode(b);
     if (d = b.length) {
-      const l = B(), m = B(), p = this.depth, n = this.resolution;
-      for (let q = 0; q < d; q++) {
-        let t = b[this.rtl ? d - 1 - q : q];
+      const l = C(), m = C(), q = this.depth, n = this.resolution;
+      for (let p = 0; p < d; p++) {
+        let t = b[this.rtl ? d - 1 - p : p];
         var e = t.length;
-        if (e && (p || !m[t])) {
-          var f = this.score ? this.score(b, t, q, null, 0) : Ua(n, d, q), g = "";
+        if (e && (q || !m[t])) {
+          var f = this.score ? this.score(b, t, p, null, 0) : Va(n, d, p), g = "";
           switch(this.tokenize) {
             case "full":
               if (2 < e) {
                 for (f = 0; f < e; f++) {
-                  for (var h = e; h > f; h--) {
-                    g = t.substring(f, h);
-                    var k = this.score ? this.score(b, t, q, g, f) : Ua(n, d, q, e, f);
-                    V(this, m, g, k, a, c);
+                  for (var k = e; k > f; k--) {
+                    g = t.substring(f, k);
+                    var h = this.score ? this.score(b, t, p, g, f) : Va(n, d, p, e, f);
+                    V(this, m, g, h, a, c);
                   }
                 }
                 break;
               }
             case "reverse":
               if (1 < e) {
-                for (h = e - 1; 0 < h; h--) {
-                  g = t[h] + g, k = this.score ? this.score(b, t, q, g, h) : Ua(n, d, q, e, h), V(this, m, g, k, a, c);
+                for (k = e - 1; 0 < k; k--) {
+                  g = t[k] + g, h = this.score ? this.score(b, t, p, g, k) : Va(n, d, p, e, k), V(this, m, g, h, a, c);
                 }
                 g = "";
               }
             case "forward":
               if (1 < e) {
-                for (h = 0; h < e; h++) {
-                  g += t[h], V(this, m, g, f, a, c);
+                for (k = 0; k < e; k++) {
+                  g += t[k], V(this, m, g, f, a, c);
                 }
                 break;
               }
             default:
-              if (V(this, m, t, f, a, c), p && 1 < d && q < d - 1) {
-                for (e = B(), g = this.R, f = t, h = Math.min(p + 1, d - q), e[f] = 1, k = 1; k < h; k++) {
-                  if ((t = b[this.rtl ? d - 1 - q - k : q + k]) && !e[t]) {
+              if (V(this, m, t, f, a, c), q && 1 < d && p < d - 1) {
+                for (e = C(), g = this.R, f = t, k = Math.min(q + 1, d - p), e[f] = 1, h = 1; h < k; h++) {
+                  if ((t = b[this.rtl ? d - 1 - p - h : p + h]) && !e[t]) {
                     e[t] = 1;
-                    const r = this.score ? this.score(b, f, q, t, k) : Ua(g + (d / 2 > g ? 0 : 1), d, q, h - 1, k - 1), u = this.bidirectional && t > f;
-                    V(this, l, u ? f : t, r, a, c, u ? t : f);
+                    const r = this.score ? this.score(b, f, p, t, h) : Va(g + (d / 2 > g ? 0 : 1), d, p, k - 1, h - 1), w = this.bidirectional && t > f;
+                    V(this, l, w ? f : t, r, a, c, w ? t : f);
                   }
                 }
               }
@@ -1444,53 +1495,53 @@ L.prototype.add = function(a, b, c, d) {
       b = "";
     }
   }
-  this.db && (b || this.commit_task.push({del:a}), this.T && Va(this));
+  this.db && (b || this.commit_task.push({del:a}), this.T && Wa(this));
   return this;
 };
 function V(a, b, c, d, e, f, g) {
-  let h = g ? a.ctx : a.map, k;
-  if (!b[c] || g && !(k = b[c])[g]) {
-    if (g ? (b = k || (b[c] = B()), b[g] = 1, (k = h.get(g)) ? h = k : h.set(g, h = new Map())) : b[c] = 1, (k = h.get(c)) ? h = k : h.set(c, h = k = []), h = h[d] || (h[d] = []), !f || !h.includes(e)) {
-      if (h.length === 2 ** 31 - 1) {
-        b = new Q(h);
+  let k = g ? a.ctx : a.map, h;
+  if (!b[c] || g && !(h = b[c])[g]) {
+    if (g ? (b = h || (b[c] = C()), b[g] = 1, (h = k.get(g)) ? k = h : k.set(g, k = new Map())) : b[c] = 1, (h = k.get(c)) ? k = h : k.set(c, k = h = []), k = k[d] || (k[d] = []), !f || !k.includes(e)) {
+      if (k.length === 2 ** 31 - 1) {
+        b = new Q(k);
         if (a.fastupdate) {
           for (let l of a.reg.values()) {
-            l.includes(h) && (l[l.indexOf(h)] = b);
+            l.includes(k) && (l[l.indexOf(k)] = b);
           }
         }
-        k[d] = h = b;
+        h[d] = k = b;
       }
-      h.push(e);
-      a.fastupdate && ((d = a.reg.get(e)) ? d.push(h) : a.reg.set(e, [h]));
+      k.push(e);
+      a.fastupdate && ((d = a.reg.get(e)) ? d.push(k) : a.reg.set(e, [k]));
     }
   }
 }
-function Ua(a, b, c, d, e) {
+function Va(a, b, c, d, e) {
   return c && 1 < a ? b + (d || 0) <= a ? c + (e || 0) : (a - 1) / (b + (d || 0)) * (c + (e || 0)) + 1 | 0 : 0;
 }
 ;function W(a, b, c, d) {
   if (1 === a.length) {
-    return a = a[0], a = c || a.length > b ? b ? a.slice(c, c + b) : a.slice(c) : a, d ? Wa(a) : a;
+    return a = a[0], a = c || a.length > b ? b ? a.slice(c, c + b) : a.slice(c) : a, d ? Xa(a) : a;
   }
   let e = [];
-  for (let f = 0, g, h; f < a.length; f++) {
-    if ((g = a[f]) && (h = g.length)) {
+  for (let f = 0, g, k; f < a.length; f++) {
+    if ((g = a[f]) && (k = g.length)) {
       if (c) {
-        if (c >= h) {
-          c -= h;
+        if (c >= k) {
+          c -= k;
           continue;
         }
-        c < h && (g = b ? g.slice(c, c + b) : g.slice(c), h = g.length, c = 0);
+        c < k && (g = b ? g.slice(c, c + b) : g.slice(c), k = g.length, c = 0);
       }
       if (e.length) {
-        h > b && (g = g.slice(0, b), h = g.length), e.push(g);
+        k > b && (g = g.slice(0, b), k = g.length), e.push(g);
       } else {
-        if (h >= b) {
-          return h > b && (g = g.slice(0, b)), d ? Wa(g) : g;
+        if (k >= b) {
+          return k > b && (g = g.slice(0, b)), d ? Xa(g) : g;
         }
         e = [g];
       }
-      b -= h;
+      b -= k;
       if (!b) {
         break;
       }
@@ -1500,9 +1551,9 @@ function Ua(a, b, c, d, e) {
     return e;
   }
   e = 1 < e.length ? [].concat.apply([], e) : e[0];
-  return d ? Wa(e) : e;
+  return d ? Xa(e) : e;
 }
-function Wa(a) {
+function Xa(a) {
   for (let b = 0; b < a.length; b++) {
     a[b] = {score:b, id:a[b]};
   }
@@ -1522,13 +1573,13 @@ function Wa(a) {
   }
   let d = [];
   c = [];
-  let e = 0, f = 0, g, h;
-  for (let k = 0, l; k < b.length; k++) {
-    if (l = b[k]) {
+  let e = 0, f = 0, g, k;
+  for (let h = 0, l; h < b.length; h++) {
+    if (l = b[h]) {
       e = l.limit || 0;
       f = l.offset || 0;
       g = l.enrich;
-      h = l.resolve;
+      k = l.resolve;
       let m;
       if (l.constructor === X) {
         m = l.result;
@@ -1545,26 +1596,26 @@ function Wa(a) {
       } else {
         continue;
       }
-      d[k] = m;
+      d[h] = m;
       m.then && c.push(m);
     }
   }
   if (c.length) {
     return Promise.all(c).then(function() {
       a.result.length && (d = d.concat([a.result]));
-      a.result = Xa(d, e, f, g, h, a.F);
-      return h ? a.result : a;
+      a.result = Ya(d, e, f, g, k, a.F);
+      return k ? a.result : a;
     });
   }
-  d.length && (this.result.length && (d = d.concat([this.result])), this.result = Xa(d, e, f, g, h, this.F));
-  return h ? this.result : this;
+  d.length && (this.result.length && (d = d.concat([this.result])), this.result = Ya(d, e, f, g, k, this.F));
+  return k ? this.result : this;
 };
-function Xa(a, b, c, d, e, f) {
+function Ya(a, b, c, d, e, f) {
   if (!a.length) {
     return a;
   }
   "object" === typeof b && (c = b.offset || 0, d = b.enrich || !1, b = b.limit || 0);
-  return 2 > a.length ? e ? W(a[0], b, c, d) : a[0] : Ba(a, c, b, e, f);
+  return 2 > a.length ? e ? W(a[0], b, c, d) : a[0] : Ca(a, c, b, e, f);
 }
 ;X.prototype.and = function() {
   if (this.result.length) {
@@ -1581,13 +1632,13 @@ function Xa(a, b, c, d, e, f) {
     }
     let d = [];
     a = [];
-    let e = 0, f = 0, g, h;
-    for (let k = 0, l; k < c.length; k++) {
-      if (l = c[k]) {
+    let e = 0, f = 0, g, k;
+    for (let h = 0, l; h < c.length; h++) {
+      if (l = c[h]) {
         e = l.limit || 0;
         f = l.offset || 0;
         g = l.resolve;
-        h = l.suggest;
+        k = l.suggest;
         let m;
         if (l.constructor === X) {
           m = l.result;
@@ -1604,7 +1655,7 @@ function Xa(a, b, c, d, e, f) {
         } else {
           continue;
         }
-        d[k] = m;
+        d[h] = m;
         m.then && a.push(m);
       }
     }
@@ -1614,24 +1665,24 @@ function Xa(a, b, c, d, e, f) {
     if (a.length) {
       return Promise.all(a).then(function() {
         d = [b.result].concat(d);
-        b.result = Ya(d, e, f, g, b.F, h);
+        b.result = Za(d, e, f, g, b.F, k);
         return g ? b.result : b;
       });
     }
     d = [this.result].concat(d);
-    this.result = Ya(d, e, f, g, this.F, h);
+    this.result = Za(d, e, f, g, this.F, k);
     return g ? this.result : this;
   }
   return this;
 };
-function Ya(a, b, c, d, e, f) {
+function Za(a, b, c, d, e, f) {
   if (2 > a.length) {
     return [];
   }
   let g = [];
-  B();
-  let h = ca(a);
-  return h ? Aa(a, h, b, c, f, e, d) : g;
+  C();
+  let k = ca(a);
+  return k ? Ba(a, k, b, c, f, e, d) : g;
 }
 ;X.prototype.xor = function() {
   const a = this;
@@ -1647,13 +1698,13 @@ function Ya(a, b, c, d, e, f) {
   }
   let d = [];
   c = [];
-  let e = 0, f = 0, g, h;
-  for (let k = 0, l; k < b.length; k++) {
-    if (l = b[k]) {
+  let e = 0, f = 0, g, k;
+  for (let h = 0, l; h < b.length; h++) {
+    if (l = b[h]) {
       e = l.limit || 0;
       f = l.offset || 0;
       g = l.enrich;
-      h = l.resolve;
+      k = l.resolve;
       let m;
       if (l.constructor === X) {
         m = l.result;
@@ -1670,21 +1721,21 @@ function Ya(a, b, c, d, e, f) {
       } else {
         continue;
       }
-      d[k] = m;
+      d[h] = m;
       m.then && c.push(m);
     }
   }
   if (c.length) {
     return Promise.all(c).then(function() {
       a.result.length && (d = [a.result].concat(d));
-      a.result = Za(d, e, f, g, !h, a.F);
-      return h ? a.result : a;
+      a.result = $a(d, e, f, g, !k, a.F);
+      return k ? a.result : a;
     });
   }
-  d.length && (this.result.length && (d = [this.result].concat(d)), this.result = Za(d, e, f, g, !h, a.F));
-  return h ? this.result : this;
+  d.length && (this.result.length && (d = [this.result].concat(d)), this.result = $a(d, e, f, g, !k, a.F));
+  return k ? this.result : this;
 };
-function Za(a, b, c, d, e, f) {
+function $a(a, b, c, d, e, f) {
   if (!a.length) {
     return a;
   }
@@ -1692,26 +1743,26 @@ function Za(a, b, c, d, e, f) {
     return e ? W(a[0], b, c, d) : a[0];
   }
   d = [];
-  const g = B();
-  let h = 0;
-  for (let k = 0, l; k < a.length; k++) {
-    if (l = a[k]) {
-      for (let m = 0, p; m < l.length; m++) {
-        if (p = l[m]) {
-          h < p.length && (h = p.length);
-          for (let n = 0, q; n < p.length; n++) {
-            q = p[n], g[q] ? g[q]++ : g[q] = 1;
+  const g = C();
+  let k = 0;
+  for (let h = 0, l; h < a.length; h++) {
+    if (l = a[h]) {
+      for (let m = 0, q; m < l.length; m++) {
+        if (q = l[m]) {
+          k < q.length && (k = q.length);
+          for (let n = 0, p; n < q.length; n++) {
+            p = q[n], g[p] ? g[p]++ : g[p] = 1;
           }
         }
       }
     }
   }
-  for (let k = 0, l, m = 0; k < h; k++) {
-    for (let p = 0, n; p < a.length; p++) {
-      if (n = a[p]) {
-        if (l = n[k]) {
-          for (let q = 0, t; q < l.length; q++) {
-            if (t = l[q], 1 === g[t]) {
+  for (let h = 0, l, m = 0; h < k; h++) {
+    for (let q = 0, n; q < a.length; q++) {
+      if (n = a[q]) {
+        if (l = n[h]) {
+          for (let p = 0, t; p < l.length; p++) {
+            if (t = l[p], 1 === g[t]) {
               if (c) {
                 c--;
               } else {
@@ -1720,7 +1771,7 @@ function Za(a, b, c, d, e, f) {
                     return d;
                   }
                 } else {
-                  const r = k + (p ? f : 0);
+                  const r = h + (q ? f : 0);
                   d[r] || (d[r] = []);
                   d[r].push(t);
                   if (++m === b) {
@@ -1751,50 +1802,50 @@ function Za(a, b, c, d, e, f) {
   let d = [];
   c = [];
   let e = 0, f = 0, g;
-  for (let h = 0, k; h < b.length; h++) {
-    if (k = b[h]) {
-      e = k.limit || 0;
-      f = k.offset || 0;
-      g = k.resolve;
+  for (let k = 0, h; k < b.length; k++) {
+    if (h = b[k]) {
+      e = h.limit || 0;
+      f = h.offset || 0;
+      g = h.resolve;
       let l;
-      if (k.constructor === X) {
-        l = k.result;
-      } else if (k.constructor === Array) {
-        l = k;
-      } else if (k.index) {
-        k.resolve = !1, l = k.index.search(k).result;
-      } else if (k.or) {
-        l = this.or(k.or);
-      } else if (k.and) {
-        l = this.and(k.and);
-      } else if (k.xor) {
-        l = this.xor(k.xor);
+      if (h.constructor === X) {
+        l = h.result;
+      } else if (h.constructor === Array) {
+        l = h;
+      } else if (h.index) {
+        h.resolve = !1, l = h.index.search(h).result;
+      } else if (h.or) {
+        l = this.or(h.or);
+      } else if (h.and) {
+        l = this.and(h.and);
+      } else if (h.xor) {
+        l = this.xor(h.xor);
       } else {
         continue;
       }
-      d[h] = l;
+      d[k] = l;
       l.then && c.push(l);
     }
   }
   if (c.length) {
     return Promise.all(c).then(function() {
-      a.result = $a.call(a, d, e, f, g);
+      a.result = ab.call(a, d, e, f, g);
       return g ? a.result : a;
     });
   }
-  d.length && (this.result = $a.call(this, d, e, f, g));
+  d.length && (this.result = ab.call(this, d, e, f, g));
   return g ? this.result : this;
 };
-function $a(a, b, c, d) {
+function ab(a, b, c, d) {
   if (!a.length) {
     return this.result;
   }
   const e = [];
   a = new Set(a.flat().flat());
-  for (let f = 0, g, h = 0; f < this.result.length; f++) {
+  for (let f = 0, g, k = 0; f < this.result.length; f++) {
     if (g = this.result[f]) {
-      for (let k = 0, l; k < g.length; k++) {
-        if (l = g[k], !a.has(l)) {
+      for (let h = 0, l; h < g.length; h++) {
+        if (l = g[h], !a.has(l)) {
           if (c) {
             c--;
           } else {
@@ -1803,7 +1854,7 @@ function $a(a, b, c, d) {
                 return e;
               }
             } else {
-              if (e[f] || (e[f] = []), e[f].push(l), ++h === b) {
+              if (e[f] || (e[f] = []), e[f].push(l), ++k === b) {
                 return e;
               }
             }
@@ -1860,129 +1911,117 @@ X.prototype.boost = function(a) {
   return this;
 };
 X.prototype.resolve = function(a, b, c) {
-  ab = 1;
+  bb = 1;
   const d = this.result;
   this.result = this.index = null;
   return d.length ? ("object" === typeof a && (c = a.enrich, b = a.offset, a = a.limit), W(d, a || 100, b, c)) : d;
 };
-let ab = 1;
-L.prototype.search = function(a, b, c) {
+let bb = 1;
+M.prototype.search = function(a, b, c) {
   c || (!b && H(a) ? (c = a, a = "") : H(b) && (c = b, b = 0));
-  let d = [], e;
-  let f, g = 0, h, k, l, m;
-  if (c) {
-    a = c.query || a;
-    b = c.limit || b;
-    g = c.offset || 0;
-    var p = c.context;
-    f = c.suggest;
-    (h = ab && !1 !== c.resolve) || (ab = 0);
-    k = h && c.enrich;
-    m = c.boost;
-    l = this.db && c.tag;
-  } else {
-    h = this.resolve || ab;
-  }
-  a = this.encoder.encode(a);
-  e = a.length;
+  let d = [], e, f, g, k = 0, h, l, m, q, n;
+  c ? (a = c.query || a, b = c.limit || b, k = c.offset || 0, f = c.context, g = c.suggest, (h = bb && !1 !== c.resolve) || (bb = 0), l = h && c.enrich, q = c.boost, n = c.resolution, m = this.db && c.tag) : h = this.resolve || bb;
+  let p = this.encoder.encode(a);
+  e = p.length;
   b || !h || (b = 100);
   if (1 === e) {
-    return bb.call(this, a[0], "", b, g, h, k, l);
+    return cb.call(this, p[0], "", b, k, h, l, m);
   }
-  p = this.depth && !1 !== p;
-  if (2 === e && p && !f) {
-    return bb.call(this, a[0], a[1], b, g, h, k, l);
+  f = this.depth && !1 !== f;
+  if (2 === e && f && !g) {
+    return cb.call(this, p[0], p[1], b, k, h, l, m);
   }
-  let n = c = 0;
+  let t = c = 0;
   if (1 < e) {
-    const r = B(), u = [];
-    for (let x = 0, D; x < e; x++) {
-      if ((D = a[x]) && !r[D]) {
-        if (f || this.db || Y(this, D)) {
-          u.push(D), r[D] = 1;
+    const x = C(), B = [];
+    for (let y = 0, v; y < e; y++) {
+      if ((v = p[y]) && !x[v]) {
+        if (g || this.db || Y(this, v)) {
+          B.push(v), x[v] = 1;
         } else {
           return h ? d : new X(d);
         }
-        const y = D.length;
-        c = Math.max(c, y);
-        n = n ? Math.min(n, y) : y;
+        const A = v.length;
+        c = Math.max(c, A);
+        t = t ? Math.min(t, A) : A;
       }
     }
-    a = u;
+    p = B;
     e = a.length;
   }
   if (!e) {
     return h ? d : new X(d);
   }
-  let q = 0, t;
+  let r = 0, w;
   if (1 === e) {
-    return bb.call(this, a[0], "", b, g, h, k, l);
+    return cb.call(this, p[0], "", b, k, h, l, m);
   }
-  if (2 === e && p && !f) {
-    return bb.call(this, a[0], a[1], b, g, h, k, l);
+  if (2 === e && f && !g) {
+    return cb.call(this, p[0], p[1], b, k, h, l, m);
   }
-  1 < e && (p ? (t = a[0], q = 1) : 9 < c && 3 < c / n && a.sort(aa));
+  1 < e && (f ? (w = p[0], r = 1) : 9 < c && 3 < c / t && p.sort(aa));
+  n || 0 === n || (n = this.resolution);
   if (this.db) {
-    if (this.db.search && (p = this.db.search(this, a, b, g, f, h, k, l), !1 !== p)) {
-      return p;
+    if (this.db.search && (a = this.db.search(this, p, b, k, g, h, l, m), !1 !== a)) {
+      return a;
     }
-    const r = this;
+    const x = this;
     return async function() {
-      for (let u, x; q < e; q++) {
-        x = a[q];
-        t ? (u = await Y(r, x, t, 0, 0, !1, !1), u = cb(u, d, f, r.R), f && !1 === u && d.length || (t = x)) : (u = await Y(r, x, "", 0, 0, !1, !1), u = cb(u, d, f, r.resolution));
-        if (u) {
-          return u;
+      for (let B, y; r < e; r++) {
+        y = p[r];
+        w ? (B = await Y(x, y, w, 0, 0, !1, !1), B = db(B, d, g, x.R), g && !1 === B && d.length || (w = y)) : (B = await Y(x, y, "", 0, 0, !1, !1), B = db(B, d, g, n));
+        if (B) {
+          return B;
         }
-        if (f && q === e - 1) {
-          let D = d.length;
-          if (!D) {
-            if (t) {
-              t = "";
-              q = -1;
+        if (g && r === e - 1) {
+          let v = d.length;
+          if (!v) {
+            if (w) {
+              w = "";
+              r = -1;
               continue;
             }
             return d;
           }
-          if (1 === D) {
-            return h ? W(d[0], b, g) : new X(d[0]);
+          if (1 === v) {
+            return h ? W(d[0], b, k) : new X(d[0]);
           }
         }
       }
-      return h ? Aa(d, r.resolution, b, g, f, m, h) : new X(d[0]);
+      return h ? Ba(d, n, b, k, g, q, h) : new X(d[0]);
     }();
   }
-  for (let r, u; q < e; q++) {
-    u = a[q];
-    t ? (r = Y(this, u, t, 0, 0, !1, !1), r = cb(r, d, f, this.R), f && !1 === r && d.length || (t = u)) : (r = Y(this, u, "", 0, 0, !1, !1), r = cb(r, d, f, this.resolution));
-    if (r) {
-      return r;
+  for (let x, B; r < e; r++) {
+    B = p[r];
+    w ? (x = Y(this, B, w, 0, 0, !1, !1), x = db(x, d, g, this.R), g && !1 === x && d.length || (w = B)) : (x = Y(this, B, "", 0, 0, !1, !1), x = db(x, d, g, n));
+    if (x) {
+      return x;
     }
-    if (f && q === e - 1) {
-      p = d.length;
-      if (!p) {
-        if (t) {
-          t = "";
-          q = -1;
+    if (g && r === e - 1) {
+      a = d.length;
+      if (!a) {
+        if (w) {
+          w = "";
+          r = -1;
           continue;
         }
         return d;
       }
-      if (1 === p) {
-        return h ? W(d[0], b, g) : new X(d[0]);
+      if (1 === a) {
+        return h ? W(d[0], b, k) : new X(d[0]);
       }
     }
   }
-  d = Aa(d, this.resolution, b, g, f, m, h);
+  d = Ba(d, n, b, k, g, q, h);
   return h ? d : new X(d);
 };
-function bb(a, b, c, d, e, f, g) {
+function cb(a, b, c, d, e, f, g) {
   a = Y(this, a, b, c, d, e, f, g);
-  return this.db ? a.then(function(h) {
-    return e ? h : h && h.length ? e ? W(h, c, d) : new X(h) : e ? [] : new X([]);
+  return this.db ? a.then(function(k) {
+    return e ? k : k && k.length ? e ? W(k, c, d) : new X(k) : e ? [] : new X([]);
   }) : a && a.length ? e ? W(a, c, d) : new X(a) : e ? [] : new X([]);
 }
-function cb(a, b, c, d) {
+function db(a, b, c, d) {
   let e = [];
   if (a) {
     d = Math.min(a.length, d);
@@ -1996,16 +2035,16 @@ function cb(a, b, c, d) {
   }
   return !c && e;
 }
-function Y(a, b, c, d, e, f, g, h) {
-  let k;
-  c && (k = a.bidirectional && b > c);
+function Y(a, b, c, d, e, f, g, k) {
+  let h;
+  c && (h = a.bidirectional && b > c);
   if (a.db) {
-    return c ? a.db.get(k ? c : b, k ? b : c, d, e, f, g, h) : a.db.get(b, "", d, e, f, g, h);
+    return c ? a.db.get(h ? c : b, h ? b : c, d, e, f, g, k) : a.db.get(b, "", d, e, f, g, k);
   }
-  a = c ? (a = a.ctx.get(k ? b : c)) && a.get(k ? c : b) : a.map.get(b);
+  a = c ? (a = a.ctx.get(h ? b : c)) && a.get(h ? c : b) : a.map.get(b);
   return a;
 }
-;L.prototype.remove = function(a, b) {
+;M.prototype.remove = function(a, b) {
   const c = this.reg.size && (this.fastupdate ? this.reg.get(a) : this.reg.has(a));
   if (c) {
     if (this.fastupdate) {
@@ -2020,15 +2059,15 @@ function Y(a, b, c, d, e, f, g, h) {
         }
       }
     } else {
-      db(this.map, a), this.depth && db(this.ctx, a);
+      eb(this.map, a), this.depth && eb(this.ctx, a);
     }
     b || this.reg.delete(a);
   }
-  this.db && (this.commit_task.push({del:a}), this.T && Va(this));
+  this.db && (this.commit_task.push({del:a}), this.T && Wa(this));
   this.cache && this.cache.remove(a);
   return this;
 };
-function db(a, b) {
+function eb(a, b) {
   let c = 0;
   if (a.constructor === Array) {
     for (let d = 0, e, f; d < a.length; d++) {
@@ -2043,67 +2082,66 @@ function db(a, b) {
     }
   } else {
     for (let d of a) {
-      const e = d[0], f = db(d[1], b);
+      const e = d[0], f = eb(d[1], b);
       f ? c += f : a.delete(e);
     }
   }
   return c;
 }
-;function L(a, b) {
-  if (!this || this.constructor !== L) {
-    return new L(a);
+;function M(a, b) {
+  if (!this || this.constructor !== M) {
+    return new M(a);
   }
   if (a) {
     var c = G(a) ? a : a.preset;
-    c && (Ta[c] || console.warn("Preset not found: " + c), a = Object.assign({}, Ta[c], a));
+    c && (Ua[c] || console.warn("Preset not found: " + c), a = Object.assign({}, Ua[c], a));
   } else {
     a = {};
   }
-  c = a.context || {};
-  const d = G(a.encoder) ? Sa[a.encoder] : a.encode || a.encoder || Ka;
-  this.encoder = d.encode ? d : "object" === typeof d ? new K(d) : {encode:d};
-  let e;
+  c = a.context;
+  const d = !0 === c ? {depth:1} : c || {}, e = G(a.encoder) ? Ta[a.encoder] : a.encode || a.encoder || La;
+  this.encoder = e.encode ? e : "object" === typeof e ? new K(e) : {encode:e};
   this.resolution = a.resolution || 9;
-  this.tokenize = e = a.tokenize || "strict";
-  this.depth = "strict" === e && c.depth || 0;
-  this.bidirectional = !1 !== c.bidirectional;
+  this.tokenize = c = a.tokenize || "strict";
+  this.depth = "strict" === c && d.depth || 0;
+  this.bidirectional = !1 !== d.bidirectional;
   this.fastupdate = !!a.fastupdate;
   this.score = a.score || null;
-  (e = a.keystore || 0) && (this.keystore = e);
-  this.map = e ? new R(e) : new Map();
-  this.ctx = e ? new R(e) : new Map();
-  this.reg = b || (this.fastupdate ? e ? new R(e) : new Map() : e ? new S(e) : new Set());
-  this.R = c.resolution || 1;
-  this.rtl = d.rtl || a.rtl || !1;
-  this.cache = (e = a.cache || null) && new U(e);
+  (c = a.keystore || 0) && (this.keystore = c);
+  this.map = c ? new R(c) : new Map();
+  this.ctx = c ? new R(c) : new Map();
+  this.reg = b || (this.fastupdate ? c ? new R(c) : new Map() : c ? new S(c) : new Set());
+  this.R = d.resolution || 3;
+  this.rtl = e.rtl || a.rtl || !1;
+  this.cache = (c = a.cache || null) && new U(c);
   this.resolve = !1 !== a.resolve;
-  if (e = a.db) {
-    this.db = this.mount(e);
+  if (c = a.db) {
+    this.db = this.mount(c);
   }
   this.T = !1 !== a.commit;
   this.commit_task = [];
   this.commit_timer = null;
 }
-v = L.prototype;
-v.mount = function(a) {
+u = M.prototype;
+u.mount = function(a) {
   this.commit_timer && (clearTimeout(this.commit_timer), this.commit_timer = null);
   return a.mount(this);
 };
-v.commit = function(a, b) {
+u.commit = function(a, b) {
   this.commit_timer && (clearTimeout(this.commit_timer), this.commit_timer = null);
   return this.db.commit(this, a, b);
 };
-v.destroy = function() {
+u.destroy = function() {
   this.commit_timer && (clearTimeout(this.commit_timer), this.commit_timer = null);
   return this.db.destroy();
 };
-function Va(a) {
+function Wa(a) {
   a.commit_timer || (a.commit_timer = setTimeout(function() {
     a.commit_timer = null;
     a.db.commit(a, void 0, void 0);
   }, 0));
 }
-v.clear = function() {
+u.clear = function() {
   this.map.clear();
   this.ctx.clear();
   this.reg.clear();
@@ -2111,17 +2149,17 @@ v.clear = function() {
   this.db && (this.commit_timer && clearTimeout(this.commit_timer), this.commit_timer = null, this.commit_task = [{clear:!0}]);
   return this;
 };
-v.append = function(a, b) {
+u.append = function(a, b) {
   return this.add(a, b, !0);
 };
-v.contain = function(a) {
+u.contain = function(a) {
   return this.db ? this.db.has(a) : this.reg.has(a);
 };
-v.update = function(a, b) {
+u.update = function(a, b) {
   const c = this, d = this.remove(a);
   return d && d.then ? d.then(() => c.add(a, b)) : this.add(a, b);
 };
-function eb(a) {
+function fb(a) {
   let b = 0;
   if (a.constructor === Array) {
     for (let c = 0, d; c < a.length; c++) {
@@ -2129,27 +2167,27 @@ function eb(a) {
     }
   } else {
     for (const c of a) {
-      const d = c[0], e = eb(c[1]);
+      const d = c[0], e = fb(c[1]);
       e ? b += e : a.delete(d);
     }
   }
   return b;
 }
-v.cleanup = function() {
+u.cleanup = function() {
   if (!this.fastupdate) {
     return console.info('Cleanup the index isn\'t required when not using "fastupdate".'), this;
   }
-  eb(this.map);
-  this.depth && eb(this.ctx);
+  fb(this.map);
+  this.depth && fb(this.ctx);
   return this;
 };
-v.searchCache = Ja;
-v.export = function(a, b, c, d = 0) {
+u.searchCache = Ka;
+u.export = function(a, b, c, d = 0) {
   let e, f;
   switch(d) {
     case 0:
       e = "reg";
-      f = sa(this.reg);
+      f = ta(this.reg);
       break;
     case 1:
       e = "cfg";
@@ -2157,33 +2195,33 @@ v.export = function(a, b, c, d = 0) {
       break;
     case 2:
       e = "map";
-      f = oa(this.map, this.reg.size);
+      f = pa(this.map, this.reg.size);
       break;
     case 3:
       e = "ctx";
-      f = qa(this.ctx, this.reg.size);
+      f = ra(this.ctx, this.reg.size);
       break;
     default:
       return;
   }
-  return ua.call(this, a, b, e, f, c, d);
+  return va.call(this, a, b, e, f, c, d);
 };
-v.import = function(a, b) {
+u.import = function(a, b) {
   if (b) {
     switch(G(b) && (b = JSON.parse(b)), a = a.split("."), "json" === a[a.length - 1] && a.pop(), a = 1 < a.length ? a[1] : a[0], a) {
       case "reg":
         this.fastupdate = !1;
-        this.reg = ta(b, this.reg);
+        this.reg = ua(b, this.reg);
         break;
       case "map":
-        this.map = pa(b, this.map);
+        this.map = qa(b, this.map);
         break;
       case "ctx":
-        this.ctx = ra(b, this.ctx);
+        this.ctx = sa(b, this.ctx);
     }
   }
 };
-v.serialize = function(a = !0) {
+u.serialize = function(a = !0) {
   if (!this.reg.size) {
     return "";
   }
@@ -2194,50 +2232,50 @@ v.serialize = function(a = !0) {
   b = "index.reg=new Set([" + b + "]);";
   d = "";
   for (var e of this.map.entries()) {
-    var f = e[0], g = e[1], h = "";
-    for (let m = 0, p; m < g.length; m++) {
-      p = g[m] || [""];
-      var k = "";
-      for (var l = 0; l < p.length; l++) {
-        k += (k ? "," : "") + ("string" === c ? '"' + p[l] + '"' : p[l]);
+    var f = e[0], g = e[1], k = "";
+    for (let m = 0, q; m < g.length; m++) {
+      q = g[m] || [""];
+      var h = "";
+      for (var l = 0; l < q.length; l++) {
+        h += (h ? "," : "") + ("string" === c ? '"' + q[l] + '"' : q[l]);
       }
-      k = "[" + k + "]";
-      h += (h ? "," : "") + k;
+      h = "[" + h + "]";
+      k += (k ? "," : "") + h;
     }
-    h = '["' + f + '",[' + h + "]]";
-    d += (d ? "," : "") + h;
+    k = '["' + f + '",[' + k + "]]";
+    d += (d ? "," : "") + k;
   }
   d = "index.map=new Map([" + d + "]);";
   e = "";
   for (const m of this.ctx.entries()) {
     f = m[0];
     g = m[1];
-    for (const p of g.entries()) {
-      g = p[0];
-      h = p[1];
-      k = "";
-      for (let n = 0, q; n < h.length; n++) {
-        q = h[n] || [""];
+    for (const q of g.entries()) {
+      g = q[0];
+      k = q[1];
+      h = "";
+      for (let n = 0, p; n < k.length; n++) {
+        p = k[n] || [""];
         l = "";
-        for (let t = 0; t < q.length; t++) {
-          l += (l ? "," : "") + ("string" === c ? '"' + q[t] + '"' : q[t]);
+        for (let t = 0; t < p.length; t++) {
+          l += (l ? "," : "") + ("string" === c ? '"' + p[t] + '"' : p[t]);
         }
         l = "[" + l + "]";
-        k += (k ? "," : "") + l;
+        h += (h ? "," : "") + l;
       }
-      k = 'new Map([["' + g + '",[' + k + "]]])";
-      k = '["' + f + '",' + k + "]";
-      e += (e ? "," : "") + k;
+      h = 'new Map([["' + g + '",[' + h + "]]])";
+      h = '["' + f + '",' + h + "]";
+      e += (e ? "," : "") + h;
     }
   }
   e = "index.ctx=new Map([" + e + "]);";
   return a ? "function inject(index){" + b + d + e + "}" : b + d + e;
 };
-na(L.prototype);
-const gb = "undefined" !== typeof window && (window.indexedDB || window.mozIndexedDB || window.webkitIndexedDB || window.msIndexedDB), hb = ["map", "ctx", "tag", "reg", "cfg"];
-function ib(a, b = {}) {
+oa(M.prototype);
+const hb = "undefined" !== typeof window && (window.indexedDB || window.mozIndexedDB || window.webkitIndexedDB || window.msIndexedDB), ib = ["map", "ctx", "tag", "reg", "cfg"];
+function jb(a, b = {}) {
   if (!this) {
-    return new ib(a, b);
+    return new jb(a, b);
   }
   "object" === typeof a && (b = a = a.name);
   a || console.info("Default storage space was used, because a name was not passed.");
@@ -2247,22 +2285,22 @@ function ib(a, b = {}) {
   this.db = null;
   this.h = {};
 }
-v = ib.prototype;
-v.mount = function(a) {
+u = jb.prototype;
+u.mount = function(a) {
   if (!a.encoder) {
     return a.mount(this);
   }
   a.db = this;
   return this.open();
 };
-v.open = function() {
+u.open = function() {
   let a = this;
   navigator.storage && navigator.storage.persist();
   return this.db || new Promise(function(b, c) {
-    const d = gb.open(a.id + (a.field ? ":" + a.field : ""), 1);
+    const d = hb.open(a.id + (a.field ? ":" + a.field : ""), 1);
     d.onupgradeneeded = function() {
       const e = a.db = this.result;
-      hb.forEach(f => {
+      ib.forEach(f => {
         e.objectStoreNames.contains(f) || e.createObjectStore(f);
       });
     };
@@ -2283,54 +2321,54 @@ v.open = function() {
     };
   });
 };
-v.close = function() {
+u.close = function() {
   this.db.close();
   this.db = null;
 };
-v.destroy = function() {
-  return gb.deleteDatabase(this.id + (this.field ? ":" + this.field : ""));
+u.destroy = function() {
+  return hb.deleteDatabase(this.id + (this.field ? ":" + this.field : ""));
 };
-v.clear = function() {
-  const a = this.db.transaction(hb, "readwrite");
-  for (let b = 0; b < hb.length; b++) {
-    a.objectStore(hb[b]).clear();
+u.clear = function() {
+  const a = this.db.transaction(ib, "readwrite");
+  for (let b = 0; b < ib.length; b++) {
+    a.objectStore(ib[b]).clear();
   }
   return Z(a);
 };
-v.get = function(a, b, c = 0, d = 0, e = !0, f = !1) {
+u.get = function(a, b, c = 0, d = 0, e = !0, f = !1) {
   a = this.db.transaction(b ? "ctx" : "map", "readonly").objectStore(b ? "ctx" : "map").get(b ? b + ":" + a : a);
   const g = this;
-  return Z(a).then(function(h) {
-    let k = [];
-    if (!h || !h.length) {
-      return k;
+  return Z(a).then(function(k) {
+    let h = [];
+    if (!k || !k.length) {
+      return h;
     }
     if (e) {
-      if (!c && !d && 1 === h.length) {
-        return h[0];
+      if (!c && !d && 1 === k.length) {
+        return k[0];
       }
-      for (let l = 0, m; l < h.length; l++) {
-        if ((m = h[l]) && m.length) {
+      for (let l = 0, m; l < k.length; l++) {
+        if ((m = k[l]) && m.length) {
           if (d >= m.length) {
             d -= m.length;
             continue;
           }
-          const p = c ? d + Math.min(m.length - d, c) : m.length;
-          for (let n = d; n < p; n++) {
-            k.push(m[n]);
+          const q = c ? d + Math.min(m.length - d, c) : m.length;
+          for (let n = d; n < q; n++) {
+            h.push(m[n]);
           }
           d = 0;
-          if (k.length === c) {
+          if (h.length === c) {
             break;
           }
         }
       }
-      return f ? g.enrich(k) : k;
+      return f ? g.enrich(h) : h;
     }
-    return h;
+    return k;
   });
 };
-v.tag = function(a, b = 0, c = 0, d = !1) {
+u.tag = function(a, b = 0, c = 0, d = !1) {
   a = this.db.transaction("tag", "readonly").objectStore("tag").get(a);
   const e = this;
   return Z(a).then(function(f) {
@@ -2344,7 +2382,7 @@ v.tag = function(a, b = 0, c = 0, d = !1) {
     return d ? e.enrich(f) : f;
   });
 };
-v.enrich = function(a) {
+u.enrich = function(a) {
   "object" !== typeof a && (a = [a]);
   const b = this.db.transaction("reg", "readonly").objectStore("reg"), c = [];
   for (let d = 0; d < a.length; d++) {
@@ -2357,14 +2395,14 @@ v.enrich = function(a) {
     return d;
   });
 };
-v.has = function(a) {
+u.has = function(a) {
   a = this.db.transaction("reg", "readonly").objectStore("reg").getKey(a);
   return Z(a);
 };
-v.search = null;
-v.info = function() {
+u.search = null;
+u.info = function() {
 };
-v.transaction = function(a, b, c) {
+u.transaction = function(a, b, c) {
   let d = this.h[a + ":" + b];
   if (d) {
     return c.call(this, d);
@@ -2372,20 +2410,20 @@ v.transaction = function(a, b, c) {
   let e = this.db.transaction(a, b);
   this.h[a + ":" + b] = d = e.objectStore(a);
   return new Promise((f, g) => {
-    e.onerror = h => {
+    e.onerror = k => {
       this.h[a + ":" + b] = null;
       e.abort();
       e = d = null;
-      g(h);
+      g(k);
     };
-    e.oncomplete = h => {
+    e.oncomplete = k => {
       e = d = this.h[a + ":" + b] = null;
-      f(h || !0);
+      f(k || !0);
     };
     return c.call(this, d);
   });
 };
-v.commit = async function(a, b, c) {
+u.commit = async function(a, b, c) {
   if (b) {
     await this.clear(), a.commit_task = [];
   } else {
@@ -2406,54 +2444,54 @@ v.commit = async function(a, b, c) {
     for (const e of a.map) {
       const f = e[0], g = e[1];
       g.length && (b ? d.put(g, f) : d.get(f).onsuccess = function() {
-        let h = this.result;
-        var k;
-        if (h && h.length) {
-          const l = Math.max(h.length, g.length);
-          for (let m = 0, p, n; m < l; m++) {
+        let k = this.result;
+        var h;
+        if (k && k.length) {
+          const l = Math.max(k.length, g.length);
+          for (let m = 0, q, n; m < l; m++) {
             if ((n = g[m]) && n.length) {
-              if ((p = h[m]) && p.length) {
-                for (k = 0; k < n.length; k++) {
-                  p.push(n[k]);
+              if ((q = k[m]) && q.length) {
+                for (h = 0; h < n.length; h++) {
+                  q.push(n[h]);
                 }
               } else {
-                h[m] = n;
+                k[m] = n;
               }
-              k = 1;
+              h = 1;
             }
           }
         } else {
-          h = g, k = 1;
+          k = g, h = 1;
         }
-        k && d.put(h, f);
+        h && d.put(k, f);
       });
     }
   }), await this.transaction("ctx", "readwrite", function(d) {
     for (const e of a.ctx) {
       const f = e[0], g = e[1];
-      for (const h of g) {
-        const k = h[0], l = h[1];
-        l.length && (b ? d.put(l, f + ":" + k) : d.get(f + ":" + k).onsuccess = function() {
+      for (const k of g) {
+        const h = k[0], l = k[1];
+        l.length && (b ? d.put(l, f + ":" + h) : d.get(f + ":" + h).onsuccess = function() {
           let m = this.result;
-          var p;
+          var q;
           if (m && m.length) {
             const n = Math.max(m.length, l.length);
-            for (let q = 0, t, r; q < n; q++) {
-              if ((r = l[q]) && r.length) {
-                if ((t = m[q]) && t.length) {
-                  for (p = 0; p < r.length; p++) {
-                    t.push(r[p]);
+            for (let p = 0, t, r; p < n; p++) {
+              if ((r = l[p]) && r.length) {
+                if ((t = m[p]) && t.length) {
+                  for (q = 0; q < r.length; q++) {
+                    t.push(r[q]);
                   }
                 } else {
-                  m[q] = r;
+                  m[p] = r;
                 }
-                p = 1;
+                q = 1;
               }
             }
           } else {
-            m = l, p = 1;
+            m = l, q = 1;
           }
-          p && d.put(m, f + ":" + k);
+          q && d.put(m, f + ":" + h);
         });
       }
     }
@@ -2470,29 +2508,29 @@ v.commit = async function(a, b, c) {
     for (const e of a.tag) {
       const f = e[0], g = e[1];
       g.length && (d.get(f).onsuccess = function() {
-        let h = this.result;
-        h = h && h.length ? h.concat(g) : g;
-        d.put(h, f);
+        let k = this.result;
+        k = k && k.length ? k.concat(g) : g;
+        d.put(k, f);
       });
     }
   }), a.map.clear(), a.ctx.clear(), a.tag && a.tag.clear(), a.store && a.store.clear(), a.document || a.reg.clear());
 };
-function jb(a, b, c) {
+function kb(a, b, c) {
   const d = a.value;
   let e, f, g = 0;
-  for (let h = 0, k; h < d.length; h++) {
-    if (k = c ? d : d[h]) {
-      for (let l = 0, m, p; l < b.length; l++) {
-        if (p = b[l], m = k.indexOf(f ? parseInt(p, 10) : p), 0 > m && !f && "string" === typeof p && !isNaN(p) && (m = k.indexOf(parseInt(p, 10))) && (f = 1), 0 <= m) {
-          if (e = 1, 1 < k.length) {
-            k.splice(m, 1);
+  for (let k = 0, h; k < d.length; k++) {
+    if (h = c ? d : d[k]) {
+      for (let l = 0, m, q; l < b.length; l++) {
+        if (q = b[l], m = h.indexOf(f ? parseInt(q, 10) : q), 0 > m && !f && "string" === typeof q && !isNaN(q) && (m = h.indexOf(parseInt(q, 10))) && (f = 1), 0 <= m) {
+          if (e = 1, 1 < h.length) {
+            h.splice(m, 1);
           } else {
-            d[h] = [];
+            d[k] = [];
             break;
           }
         }
       }
-      g += k.length;
+      g += h.length;
     }
     if (c) {
       break;
@@ -2501,22 +2539,22 @@ function jb(a, b, c) {
   g ? e && a.update(d) : a.delete();
   a.continue();
 }
-v.remove = function(a) {
+u.remove = function(a) {
   "object" !== typeof a && (a = [a]);
   return Promise.all([this.transaction("map", "readwrite", function(b) {
     b.openCursor().onsuccess = function() {
       const c = this.result;
-      c && jb(c, a);
+      c && kb(c, a);
     };
   }), this.transaction("ctx", "readwrite", function(b) {
     b.openCursor().onsuccess = function() {
       const c = this.result;
-      c && jb(c, a);
+      c && kb(c, a);
     };
   }), this.transaction("tag", "readwrite", function(b) {
     b.openCursor().onsuccess = function() {
       const c = this.result;
-      c && jb(c, a, !0);
+      c && kb(c, a, !0);
     };
   }), this.transaction("reg", "readwrite", function(b) {
     for (let c = 0; c < a.length; c++) {
@@ -2536,6 +2574,6 @@ function Z(a) {
     a = null;
   });
 }
-;export default {Index:L, Charset:Sa, Encoder:K, Document:T, Worker:N, Resolver:X, IndexedDB:ib, Language:{}};
+;export default {Index:M, Charset:Ta, Encoder:K, Document:T, Worker:N, Resolver:X, IndexedDB:jb, Language:{}};
 
-export const Index=L;export const  Charset=Sa;export const  Encoder=K;export const  Document=T;export const  Worker=N;export const  Resolver=X;export const  IndexedDB=ib;export const  Language={};
\ No newline at end of file
+export const Index=M;export const  Charset=Ta;export const  Encoder=K;export const  Document=T;export const  Worker=N;export const  Resolver=X;export const  IndexedDB=jb;export const  Language={};
\ No newline at end of file
diff --git a/dist/flexsearch.bundle.module.min.js b/dist/flexsearch.bundle.module.min.js
index 3deaa4c..ba26f90 100644
--- a/dist/flexsearch.bundle.module.min.js
+++ b/dist/flexsearch.bundle.module.min.js
@@ -5,99 +5,102 @@
  * Hosted by Nextapps GmbH
  * https://github.com/nextapps-de/flexsearch
  */
-var v;function z(a,b,c){const d=typeof c,e=typeof a;if("undefined"!==d){if("undefined"!==e){if(c){if("function"===e&&d===e)return function(h){return a(c(h))};b=a.constructor;if(b===c.constructor){if(b===Array)return c.concat(a);if(b===Map){var f=new Map(c);for(var g of a)f.set(g[0],g[1]);return f}if(b===Set){g=new Set(c);for(f of a.values())g.add(f);return g}}}return a}return c}return"undefined"===e?b:a}function B(){return Object.create(null)}function aa(a,b){return b.length-a.length}
+var u;function z(a,b,c){const d=typeof c,e=typeof a;if("undefined"!==d){if("undefined"!==e){if(c){if("function"===e&&d===e)return function(k){return a(c(k))};b=a.constructor;if(b===c.constructor){if(b===Array)return c.concat(a);if(b===Map){var f=new Map(c);for(var g of a)f.set(g[0],g[1]);return f}if(b===Set){g=new Set(c);for(f of a.values())g.add(f);return g}}}return a}return c}return"undefined"===e?b:a}function C(){return Object.create(null)}function aa(a,b){return b.length-a.length}
 function F(a){return"string"===typeof a}function G(a){return"object"===typeof a}function ba(a){const b=[];for(const c of a.keys())b.push(c);return b}function J(a,b){if(F(b))a=a[b];else for(let c=0;a&&c<b.length;c++)a=a[b[c]];return a}function ca(a){let b=0;for(let c=0,d;c<a.length;c++)(d=a[c])&&b<d.length&&(b=d.length);return b};var da=[["\u00aa","a"],["\u00b2","2"],["\u00b3","3"],["\u00b9","1"],["\u00ba","o"],["\u00bc","1\u20444"],["\u00bd","1\u20442"],["\u00be","3\u20444"],["\u00e0","a"],["\u00e1","a"],["\u00e2","a"],["\u00e3","a"],["\u00e4","a"],["\u00e5","a"],["\u00e7","c"],["\u00e8","e"],["\u00e9","e"],["\u00ea","e"],["\u00eb","e"],["\u00ec","i"],["\u00ed","i"],["\u00ee","i"],["\u00ef","i"],["\u00f1","n"],["\u00f2","o"],["\u00f3","o"],["\u00f4","o"],["\u00f5","o"],["\u00f6","o"],["\u00f9","u"],["\u00fa","u"],["\u00fb",
 "u"],["\u00fc","u"],["\u00fd","y"],["\u00ff","y"],["\u0101","a"],["\u0103","a"],["\u0105","a"],["\u0107","c"],["\u0109","c"],["\u010b","c"],["\u010d","c"],["\u010f","d"],["\u0113","e"],["\u0115","e"],["\u0117","e"],["\u0119","e"],["\u011b","e"],["\u011d","g"],["\u011f","g"],["\u0121","g"],["\u0123","g"],["\u0125","h"],["\u0129","i"],["\u012b","i"],["\u012d","i"],["\u012f","i"],["\u0133","ij"],["\u0135","j"],["\u0137","k"],["\u013a","l"],["\u013c","l"],["\u013e","l"],["\u0140","l"],["\u0144","n"],
 ["\u0146","n"],["\u0148","n"],["\u0149","n"],["\u014d","o"],["\u014f","o"],["\u0151","o"],["\u0155","r"],["\u0157","r"],["\u0159","r"],["\u015b","s"],["\u015d","s"],["\u015f","s"],["\u0161","s"],["\u0163","t"],["\u0165","t"],["\u0169","u"],["\u016b","u"],["\u016d","u"],["\u016f","u"],["\u0171","u"],["\u0173","u"],["\u0175","w"],["\u0177","y"],["\u017a","z"],["\u017c","z"],["\u017e","z"],["\u017f","s"],["\u01a1","o"],["\u01b0","u"],["\u01c6","dz"],["\u01c9","lj"],["\u01cc","nj"],["\u01ce","a"],["\u01d0",
 "i"],["\u01d2","o"],["\u01d4","u"],["\u01d6","u"],["\u01d8","u"],["\u01da","u"],["\u01dc","u"],["\u01df","a"],["\u01e1","a"],["\u01e3","ae"],["\u00e6","ae"],["\u01fd","ae"],["\u01e7","g"],["\u01e9","k"],["\u01eb","o"],["\u01ed","o"],["\u01ef","\u0292"],["\u01f0","j"],["\u01f3","dz"],["\u01f5","g"],["\u01f9","n"],["\u01fb","a"],["\u01ff","\u00f8"],["\u0201","a"],["\u0203","a"],["\u0205","e"],["\u0207","e"],["\u0209","i"],["\u020b","i"],["\u020d","o"],["\u020f","o"],["\u0211","r"],["\u0213","r"],["\u0215",
 "u"],["\u0217","u"],["\u0219","s"],["\u021b","t"],["\u021f","h"],["\u0227","a"],["\u0229","e"],["\u022b","o"],["\u022d","o"],["\u022f","o"],["\u0231","o"],["\u0233","y"],["\u02b0","h"],["\u02b1","h"],["\u0266","h"],["\u02b2","j"],["\u02b3","r"],["\u02b4","\u0279"],["\u02b5","\u027b"],["\u02b6","\u0281"],["\u02b7","w"],["\u02b8","y"],["\u02e0","\u0263"],["\u02e1","l"],["\u02e2","s"],["\u02e3","x"],["\u02e4","\u0295"],["\u0390","\u03b9"],["\u03ac","\u03b1"],["\u03ad","\u03b5"],["\u03ae","\u03b7"],["\u03af",
 "\u03b9"],["\u03b0","\u03c5"],["\u03ca","\u03b9"],["\u03cb","\u03c5"],["\u03cc","\u03bf"],["\u03cd","\u03c5"],["\u03ce","\u03c9"],["\u03d0","\u03b2"],["\u03d1","\u03b8"],["\u03d2","\u03a5"],["\u03d3","\u03a5"],["\u03d4","\u03a5"],["\u03d5","\u03c6"],["\u03d6","\u03c0"],["\u03f0","\u03ba"],["\u03f1","\u03c1"],["\u03f2","\u03c2"],["\u03f5","\u03b5"],["\u0439","\u0438"],["\u0450","\u0435"],["\u0451","\u0435"],["\u0453","\u0433"],["\u0457","\u0456"],["\u045c","\u043a"],["\u045d","\u0438"],["\u045e","\u0443"],
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-function db(a,b){let c=0;if(a.constructor===Array)for(let d=0,e,f;d<a.length;d++){if((e=a[d])&&e.length)if(f=e.indexOf(b),0<=f){1<e.length?(e.splice(f,1),c++):delete a[d];break}else c++}else for(let d of a){const e=d[0],f=db(d[1],b);f?c+=f:a.delete(e)}return c};function L(a,b){if(!this||this.constructor!==L)return new L(a);if(a){var c=F(a)?a:a.preset;c&&(a=Object.assign({},Ta[c],a))}else a={};c=a.context||{};const d=F(a.encoder)?Sa[a.encoder]:a.encode||a.encoder||Ka;this.encoder=d.encode?d:"object"===typeof d?new K(d):{encode:d};let e;this.resolution=a.resolution||9;this.tokenize=e=a.tokenize||"strict";this.depth="strict"===e&&c.depth||0;this.bidirectional=!1!==c.bidirectional;this.fastupdate=!!a.fastupdate;this.score=a.score||null;(e=a.keystore||0)&&(this.keystore=
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-v.commit=function(a,b){this.commit_timer&&(clearTimeout(this.commit_timer),this.commit_timer=null);return this.db.commit(this,a,b)};v.destroy=function(){this.commit_timer&&(clearTimeout(this.commit_timer),this.commit_timer=null);return this.db.destroy()};function Va(a){a.commit_timer||(a.commit_timer=setTimeout(function(){a.commit_timer=null;a.db.commit(a,void 0,void 0)},0))}
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-v.serialize=function(a=!0){if(!this.reg.size)return"";let b="",c="";for(var d of this.reg.keys())c||(c=typeof d),b+=(b?",":"")+("string"===c?'"'+d+'"':d);b="index.reg=new Set(["+b+"]);";d="";for(var e of this.map.entries()){var f=e[0],g=e[1],h="";for(let m=0,p;m<g.length;m++){p=g[m]||[""];var k="";for(var l=0;l<p.length;l++)k+=(k?",":"")+("string"===c?'"'+p[l]+'"':p[l]);k="["+k+"]";h+=(h?",":"")+k}h='["'+f+'",['+h+"]]";d+=(d?",":"")+h}d="index.map=new Map(["+d+"]);";e="";for(const m of this.ctx.entries()){f=
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-function ib(a,b={}){if(!this)return new ib(a,b);"object"===typeof a&&(b=a=a.name);a||console.info("Default storage space was used, because a name was not passed.");this.id="flexsearch"+(a?":"+a.toLowerCase().replace(/[^a-z0-9_\-]/g,""):"");this.field=b.field?b.field.toLowerCase().replace(/[^a-z0-9_\-]/g,""):"";this.support_tag_search=!1;this.db=null;this.h={}}v=ib.prototype;v.mount=function(a){if(!a.encoder)return a.mount(this);a.db=this;return this.open()};
-v.open=function(){let a=this;navigator.storage&&navigator.storage.persist();return this.db||new Promise(function(b,c){const d=gb.open(a.id+(a.field?":"+a.field:""),1);d.onupgradeneeded=function(){const e=a.db=this.result;hb.forEach(f=>{e.objectStoreNames.contains(f)||e.createObjectStore(f)})};d.onblocked=function(e){console.error("blocked",e);c()};d.onerror=function(e){console.error(this.error,e);c()};d.onsuccess=function(){a.db=this.result;a.db.onversionchange=function(){a.close()};b(a)}})};
-v.close=function(){this.db.close();this.db=null};v.destroy=function(){return gb.deleteDatabase(this.id+(this.field?":"+this.field:""))};v.clear=function(){const a=this.db.transaction(hb,"readwrite");for(let b=0;b<hb.length;b++)a.objectStore(hb[b]).clear();return Z(a)};
-v.get=function(a,b,c=0,d=0,e=!0,f=!1){a=this.db.transaction(b?"ctx":"map","readonly").objectStore(b?"ctx":"map").get(b?b+":"+a:a);const g=this;return Z(a).then(function(h){let k=[];if(!h||!h.length)return k;if(e){if(!c&&!d&&1===h.length)return h[0];for(let l=0,m;l<h.length;l++)if((m=h[l])&&m.length){if(d>=m.length){d-=m.length;continue}const p=c?d+Math.min(m.length-d,c):m.length;for(let n=d;n<p;n++)k.push(m[n]);d=0;if(k.length===c)break}return f?g.enrich(k):k}return h})};
-v.tag=function(a,b=0,c=0,d=!1){a=this.db.transaction("tag","readonly").objectStore("tag").get(a);const e=this;return Z(a).then(function(f){if(!f||!f.length||c>=f.length)return[];if(!b&&!c)return f;f=f.slice(c,c+b);return d?e.enrich(f):f})};
-v.enrich=function(a){"object"!==typeof a&&(a=[a]);const b=this.db.transaction("reg","readonly").objectStore("reg"),c=[];for(let d=0;d<a.length;d++)c[d]=Z(b.get(a[d]));return Promise.all(c).then(function(d){for(let e=0;e<d.length;e++)d[e]={id:a[e],doc:d[e]?JSON.parse(d[e]):null};return d})};v.has=function(a){a=this.db.transaction("reg","readonly").objectStore("reg").getKey(a);return Z(a)};v.search=null;v.info=function(){};
-v.transaction=function(a,b,c){let d=this.h[a+":"+b];if(d)return c.call(this,d);let e=this.db.transaction(a,b);this.h[a+":"+b]=d=e.objectStore(a);return new Promise((f,g)=>{e.onerror=h=>{this.h[a+":"+b]=null;e.abort();e=d=null;g(h)};e.oncomplete=h=>{e=d=this.h[a+":"+b]=null;f(h||!0)};return c.call(this,d)})};
-v.commit=async function(a,b,c){if(b)await this.clear(),a.commit_task=[];else{let d=a.commit_task;a.commit_task=[];for(let e=0,f;e<d.length;e++)if(f=d[e],f.clear){await this.clear();b=!0;break}else d[e]=f.V;b||(c||(d=d.concat(ba(a.reg))),d.length&&await this.remove(d))}a.reg.size&&(await this.transaction("map","readwrite",function(d){for(const e of a.map){const f=e[0],g=e[1];g.length&&(b?d.put(g,f):d.get(f).onsuccess=function(){let h=this.result;var k;if(h&&h.length){const l=Math.max(h.length,g.length);
-for(let m=0,p,n;m<l;m++)if((n=g[m])&&n.length){if((p=h[m])&&p.length)for(k=0;k<n.length;k++)p.push(n[k]);else h[m]=n;k=1}}else h=g,k=1;k&&d.put(h,f)})}}),await this.transaction("ctx","readwrite",function(d){for(const e of a.ctx){const f=e[0],g=e[1];for(const h of g){const k=h[0],l=h[1];l.length&&(b?d.put(l,f+":"+k):d.get(f+":"+k).onsuccess=function(){let m=this.result;var p;if(m&&m.length){const n=Math.max(m.length,l.length);for(let q=0,r,t;q<n;q++)if((t=l[q])&&t.length){if((r=m[q])&&r.length)for(p=
-0;p<t.length;p++)r.push(t[p]);else m[q]=t;p=1}}else m=l,p=1;p&&d.put(m,f+":"+k)})}}}),a.store?await this.transaction("reg","readwrite",function(d){for(const e of a.store){const f=e[0],g=e[1];d.put("object"===typeof g?JSON.stringify(g):1,f)}}):a.bypass||await this.transaction("reg","readwrite",function(d){for(const e of a.reg.keys())d.put(1,e)}),a.tag&&await this.transaction("tag","readwrite",function(d){for(const e of a.tag){const f=e[0],g=e[1];g.length&&(d.get(f).onsuccess=function(){let h=this.result;
-h=h&&h.length?h.concat(g):g;d.put(h,f)})}}),a.map.clear(),a.ctx.clear(),a.tag&&a.tag.clear(),a.store&&a.store.clear(),a.document||a.reg.clear())};
-function jb(a,b,c){const d=a.value;let e,f,g=0;for(let h=0,k;h<d.length;h++){if(k=c?d:d[h]){for(let l=0,m,p;l<b.length;l++)if(p=b[l],m=k.indexOf(f?parseInt(p,10):p),0>m&&!f&&"string"===typeof p&&!isNaN(p)&&(m=k.indexOf(parseInt(p,10)))&&(f=1),0<=m)if(e=1,1<k.length)k.splice(m,1);else{d[h]=[];break}g+=k.length}if(c)break}g?e&&a.update(d):a.delete();a.continue()}
-v.remove=function(a){"object"!==typeof a&&(a=[a]);return Promise.all([this.transaction("map","readwrite",function(b){b.openCursor().onsuccess=function(){const c=this.result;c&&jb(c,a)}}),this.transaction("ctx","readwrite",function(b){b.openCursor().onsuccess=function(){const c=this.result;c&&jb(c,a)}}),this.transaction("tag","readwrite",function(b){b.openCursor().onsuccess=function(){const c=this.result;c&&jb(c,a,!0)}}),this.transaction("reg","readwrite",function(b){for(let c=0;c<a.length;c++)b.delete(a[c])})])};
-function Z(a){return new Promise((b,c)=>{a.onsuccess=function(){b(this.result)};a.oncomplete=function(){b(this.result)};a.onerror=c;a=null})};export default {Index:L,Charset:Sa,Encoder:K,Document:T,Worker:N,Resolver:X,IndexedDB:ib,Language:{}};
-export const Index=L;export const Charset=Sa;export const Encoder=K;export const Document=T;export const Worker=N;export const Resolver=X;export const IndexedDB=ib;export const Language={};
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+z(a.minlength,1,this.minlength);this.maxlength=z(a.maxlength,0,this.maxlength);if(this.cache=c=z(a.cache,!0,this.cache))this.L=null,this.S="number"===typeof c?c:2E5,this.H=new Map,this.I=new Map,this.M=this.B=128;this.h="";this.N=null;this.A="";this.O=null;if(this.matcher)for(const d of this.matcher.keys())this.h+=(this.h?"|":"")+d;if(this.stemmer)for(const d of this.stemmer.keys())this.A+=(this.A?"|":"")+d;return this};
+u.addMatcher=function(a,b){if("object"===typeof a)return this.addReplacer(a,b);if(2>a.length)return this.addMapper(a,b);this.matcher||(this.matcher=new Map);this.matcher.set(a,b);this.h+=(this.h?"|":"")+a;this.N=null;this.cache&&L(this);return this};u.addStemmer=function(a,b){this.stemmer||(this.stemmer=new Map);this.stemmer.set(a,b);this.A+=(this.A?"|":"")+a;this.O=null;this.cache&&L(this);return this};
+u.addFilter=function(a){this.filter||(this.filter=new Set);this.filter.add(a);this.cache&&L(this);return this};u.addMapper=function(a,b){if("object"===typeof a)return this.addReplacer(a,b);if(1<a.length)return this.addMatcher(a,b);this.mapper||(this.mapper=new Map);this.mapper.set(a,b);this.cache&&L(this);return this};u.addReplacer=function(a,b){"string"===typeof a&&(a=new RegExp(a,"g"));this.replacer||(this.replacer=[]);this.replacer.push(a,b||"");this.cache&&L(this);return this};
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+function Y(a,b,c,d,e,f,g,k){let h;c&&(h=a.bidirectional&&b>c);if(a.db)return c?a.db.get(h?c:b,h?b:c,d,e,f,g,k):a.db.get(b,"",d,e,f,g,k);a=c?(a=a.ctx.get(h?b:c))&&a.get(h?c:b):a.map.get(b);return a};M.prototype.remove=function(a,b){const c=this.reg.size&&(this.fastupdate?this.reg.get(a):this.reg.has(a));if(c){if(this.fastupdate)for(let d=0,e;d<c.length;d++){if(e=c[d])if(2>e.length)e.pop();else{const f=e.indexOf(a);f===c.length-1?e.pop():e.splice(f,1)}}else eb(this.map,a),this.depth&&eb(this.ctx,a);b||this.reg.delete(a)}this.db&&(this.commit_task.push({del:a}),this.T&&Wa(this));this.cache&&this.cache.remove(a);return this};
+function eb(a,b){let c=0;if(a.constructor===Array)for(let d=0,e,f;d<a.length;d++){if((e=a[d])&&e.length)if(f=e.indexOf(b),0<=f){1<e.length?(e.splice(f,1),c++):delete a[d];break}else c++}else for(let d of a){const e=d[0],f=eb(d[1],b);f?c+=f:a.delete(e)}return c};function M(a,b){if(!this||this.constructor!==M)return new M(a);if(a){var c=F(a)?a:a.preset;c&&(a=Object.assign({},Ua[c],a))}else a={};c=a.context;const d=!0===c?{depth:1}:c||{},e=F(a.encoder)?Ta[a.encoder]:a.encode||a.encoder||La;this.encoder=e.encode?e:"object"===typeof e?new K(e):{encode:e};this.resolution=a.resolution||9;this.tokenize=c=a.tokenize||"strict";this.depth="strict"===c&&d.depth||0;this.bidirectional=!1!==d.bidirectional;this.fastupdate=!!a.fastupdate;this.score=a.score||null;(c=a.keystore||
+0)&&(this.keystore=c);this.map=c?new R(c):new Map;this.ctx=c?new R(c):new Map;this.reg=b||(this.fastupdate?c?new R(c):new Map:c?new S(c):new Set);this.R=d.resolution||3;this.rtl=e.rtl||a.rtl||!1;this.cache=(c=a.cache||null)&&new U(c);this.resolve=!1!==a.resolve;if(c=a.db)this.db=this.mount(c);this.T=!1!==a.commit;this.commit_task=[];this.commit_timer=null}u=M.prototype;u.mount=function(a){this.commit_timer&&(clearTimeout(this.commit_timer),this.commit_timer=null);return a.mount(this)};
+u.commit=function(a,b){this.commit_timer&&(clearTimeout(this.commit_timer),this.commit_timer=null);return this.db.commit(this,a,b)};u.destroy=function(){this.commit_timer&&(clearTimeout(this.commit_timer),this.commit_timer=null);return this.db.destroy()};function Wa(a){a.commit_timer||(a.commit_timer=setTimeout(function(){a.commit_timer=null;a.db.commit(a,void 0,void 0)},0))}
+u.clear=function(){this.map.clear();this.ctx.clear();this.reg.clear();this.cache&&this.cache.clear();this.db&&(this.commit_timer&&clearTimeout(this.commit_timer),this.commit_timer=null,this.commit_task=[{clear:!0}]);return this};u.append=function(a,b){return this.add(a,b,!0)};u.contain=function(a){return this.db?this.db.has(a):this.reg.has(a)};u.update=function(a,b){const c=this,d=this.remove(a);return d&&d.then?d.then(()=>c.add(a,b)):this.add(a,b)};
+function gb(a){let b=0;if(a.constructor===Array)for(let c=0,d;c<a.length;c++)(d=a[c])&&(b+=d.length);else for(const c of a){const d=c[0],e=gb(c[1]);e?b+=e:a.delete(d)}return b}u.cleanup=function(){if(!this.fastupdate)return this;gb(this.map);this.depth&&gb(this.ctx);return this};u.searchCache=Ka;
+u.export=function(a,b,c,d=0){let e,f;switch(d){case 0:e="reg";f=ta(this.reg);break;case 1:e="cfg";f={};break;case 2:e="map";f=pa(this.map,this.reg.size);break;case 3:e="ctx";f=ra(this.ctx,this.reg.size);break;default:return}return va.call(this,a,b,e,f,c,d)};
+u.import=function(a,b){if(b)switch(F(b)&&(b=JSON.parse(b)),a=a.split("."),"json"===a[a.length-1]&&a.pop(),a=1<a.length?a[1]:a[0],a){case "reg":this.fastupdate=!1;this.reg=ua(b,this.reg);break;case "map":this.map=qa(b,this.map);break;case "ctx":this.ctx=sa(b,this.ctx)}};
+u.serialize=function(a=!0){if(!this.reg.size)return"";let b="",c="";for(var d of this.reg.keys())c||(c=typeof d),b+=(b?",":"")+("string"===c?'"'+d+'"':d);b="index.reg=new Set(["+b+"]);";d="";for(var e of this.map.entries()){var f=e[0],g=e[1],k="";for(let m=0,q;m<g.length;m++){q=g[m]||[""];var h="";for(var l=0;l<q.length;l++)h+=(h?",":"")+("string"===c?'"'+q[l]+'"':q[l]);h="["+h+"]";k+=(k?",":"")+h}k='["'+f+'",['+k+"]]";d+=(d?",":"")+k}d="index.map=new Map(["+d+"]);";e="";for(const m of this.ctx.entries()){f=
+m[0];g=m[1];for(const q of g.entries()){g=q[0];k=q[1];h="";for(let n=0,p;n<k.length;n++){p=k[n]||[""];l="";for(let r=0;r<p.length;r++)l+=(l?",":"")+("string"===c?'"'+p[r]+'"':p[r]);l="["+l+"]";h+=(h?",":"")+l}h='new Map([["'+g+'",['+h+"]]])";h='["'+f+'",'+h+"]";e+=(e?",":"")+h}}e="index.ctx=new Map(["+e+"]);";return a?"function inject(index){"+b+d+e+"}":b+d+e};oa(M.prototype);const hb="undefined"!==typeof window&&(window.indexedDB||window.mozIndexedDB||window.webkitIndexedDB||window.msIndexedDB),ib=["map","ctx","tag","reg","cfg"];
+function jb(a,b={}){if(!this)return new jb(a,b);"object"===typeof a&&(b=a=a.name);a||console.info("Default storage space was used, because a name was not passed.");this.id="flexsearch"+(a?":"+a.toLowerCase().replace(/[^a-z0-9_\-]/g,""):"");this.field=b.field?b.field.toLowerCase().replace(/[^a-z0-9_\-]/g,""):"";this.support_tag_search=!1;this.db=null;this.h={}}u=jb.prototype;u.mount=function(a){if(!a.encoder)return a.mount(this);a.db=this;return this.open()};
+u.open=function(){let a=this;navigator.storage&&navigator.storage.persist();return this.db||new Promise(function(b,c){const d=hb.open(a.id+(a.field?":"+a.field:""),1);d.onupgradeneeded=function(){const e=a.db=this.result;ib.forEach(f=>{e.objectStoreNames.contains(f)||e.createObjectStore(f)})};d.onblocked=function(e){console.error("blocked",e);c()};d.onerror=function(e){console.error(this.error,e);c()};d.onsuccess=function(){a.db=this.result;a.db.onversionchange=function(){a.close()};b(a)}})};
+u.close=function(){this.db.close();this.db=null};u.destroy=function(){return hb.deleteDatabase(this.id+(this.field?":"+this.field:""))};u.clear=function(){const a=this.db.transaction(ib,"readwrite");for(let b=0;b<ib.length;b++)a.objectStore(ib[b]).clear();return Z(a)};
+u.get=function(a,b,c=0,d=0,e=!0,f=!1){a=this.db.transaction(b?"ctx":"map","readonly").objectStore(b?"ctx":"map").get(b?b+":"+a:a);const g=this;return Z(a).then(function(k){let h=[];if(!k||!k.length)return h;if(e){if(!c&&!d&&1===k.length)return k[0];for(let l=0,m;l<k.length;l++)if((m=k[l])&&m.length){if(d>=m.length){d-=m.length;continue}const q=c?d+Math.min(m.length-d,c):m.length;for(let n=d;n<q;n++)h.push(m[n]);d=0;if(h.length===c)break}return f?g.enrich(h):h}return k})};
+u.tag=function(a,b=0,c=0,d=!1){a=this.db.transaction("tag","readonly").objectStore("tag").get(a);const e=this;return Z(a).then(function(f){if(!f||!f.length||c>=f.length)return[];if(!b&&!c)return f;f=f.slice(c,c+b);return d?e.enrich(f):f})};
+u.enrich=function(a){"object"!==typeof a&&(a=[a]);const b=this.db.transaction("reg","readonly").objectStore("reg"),c=[];for(let d=0;d<a.length;d++)c[d]=Z(b.get(a[d]));return Promise.all(c).then(function(d){for(let e=0;e<d.length;e++)d[e]={id:a[e],doc:d[e]?JSON.parse(d[e]):null};return d})};u.has=function(a){a=this.db.transaction("reg","readonly").objectStore("reg").getKey(a);return Z(a)};u.search=null;u.info=function(){};
+u.transaction=function(a,b,c){let d=this.h[a+":"+b];if(d)return c.call(this,d);let e=this.db.transaction(a,b);this.h[a+":"+b]=d=e.objectStore(a);return new Promise((f,g)=>{e.onerror=k=>{this.h[a+":"+b]=null;e.abort();e=d=null;g(k)};e.oncomplete=k=>{e=d=this.h[a+":"+b]=null;f(k||!0)};return c.call(this,d)})};
+u.commit=async function(a,b,c){if(b)await this.clear(),a.commit_task=[];else{let d=a.commit_task;a.commit_task=[];for(let e=0,f;e<d.length;e++)if(f=d[e],f.clear){await this.clear();b=!0;break}else d[e]=f.V;b||(c||(d=d.concat(ba(a.reg))),d.length&&await this.remove(d))}a.reg.size&&(await this.transaction("map","readwrite",function(d){for(const e of a.map){const f=e[0],g=e[1];g.length&&(b?d.put(g,f):d.get(f).onsuccess=function(){let k=this.result;var h;if(k&&k.length){const l=Math.max(k.length,g.length);
+for(let m=0,q,n;m<l;m++)if((n=g[m])&&n.length){if((q=k[m])&&q.length)for(h=0;h<n.length;h++)q.push(n[h]);else k[m]=n;h=1}}else k=g,h=1;h&&d.put(k,f)})}}),await this.transaction("ctx","readwrite",function(d){for(const e of a.ctx){const f=e[0],g=e[1];for(const k of g){const h=k[0],l=k[1];l.length&&(b?d.put(l,f+":"+h):d.get(f+":"+h).onsuccess=function(){let m=this.result;var q;if(m&&m.length){const n=Math.max(m.length,l.length);for(let p=0,r,t;p<n;p++)if((t=l[p])&&t.length){if((r=m[p])&&r.length)for(q=
+0;q<t.length;q++)r.push(t[q]);else m[p]=t;q=1}}else m=l,q=1;q&&d.put(m,f+":"+h)})}}}),a.store?await this.transaction("reg","readwrite",function(d){for(const e of a.store){const f=e[0],g=e[1];d.put("object"===typeof g?JSON.stringify(g):1,f)}}):a.bypass||await this.transaction("reg","readwrite",function(d){for(const e of a.reg.keys())d.put(1,e)}),a.tag&&await this.transaction("tag","readwrite",function(d){for(const e of a.tag){const f=e[0],g=e[1];g.length&&(d.get(f).onsuccess=function(){let k=this.result;
+k=k&&k.length?k.concat(g):g;d.put(k,f)})}}),a.map.clear(),a.ctx.clear(),a.tag&&a.tag.clear(),a.store&&a.store.clear(),a.document||a.reg.clear())};
+function kb(a,b,c){const d=a.value;let e,f,g=0;for(let k=0,h;k<d.length;k++){if(h=c?d:d[k]){for(let l=0,m,q;l<b.length;l++)if(q=b[l],m=h.indexOf(f?parseInt(q,10):q),0>m&&!f&&"string"===typeof q&&!isNaN(q)&&(m=h.indexOf(parseInt(q,10)))&&(f=1),0<=m)if(e=1,1<h.length)h.splice(m,1);else{d[k]=[];break}g+=h.length}if(c)break}g?e&&a.update(d):a.delete();a.continue()}
+u.remove=function(a){"object"!==typeof a&&(a=[a]);return Promise.all([this.transaction("map","readwrite",function(b){b.openCursor().onsuccess=function(){const c=this.result;c&&kb(c,a)}}),this.transaction("ctx","readwrite",function(b){b.openCursor().onsuccess=function(){const c=this.result;c&&kb(c,a)}}),this.transaction("tag","readwrite",function(b){b.openCursor().onsuccess=function(){const c=this.result;c&&kb(c,a,!0)}}),this.transaction("reg","readwrite",function(b){for(let c=0;c<a.length;c++)b.delete(a[c])})])};
+function Z(a){return new Promise((b,c)=>{a.onsuccess=function(){b(this.result)};a.oncomplete=function(){b(this.result)};a.onerror=c;a=null})};export default {Index:M,Charset:Ta,Encoder:K,Document:T,Worker:N,Resolver:X,IndexedDB:jb,Language:{}};
+export const Index=M;export const Charset=Ta;export const Encoder=K;export const Document=T;export const Worker=N;export const Resolver=X;export const IndexedDB=jb;export const Language={};
\ No newline at end of file
diff --git a/dist/flexsearch.compact.debug.js b/dist/flexsearch.compact.debug.js
index 0145ce5..13cfe2a 100644
--- a/dist/flexsearch.compact.debug.js
+++ b/dist/flexsearch.compact.debug.js
@@ -6,31 +6,31 @@
  * https://github.com/nextapps-de/flexsearch
  */
 (function _f(self){'use strict';if(typeof module!=='undefined')self=module;else if(typeof process !== 'undefined')self=process;self._factory=_f;
-var x;
-function B(a, c, b) {
-  const e = typeof b, d = typeof a;
+var w;
+function B(a, b, c) {
+  const e = typeof c, d = typeof a;
   if ("undefined" !== e) {
     if ("undefined" !== d) {
-      if (b) {
+      if (c) {
         if ("function" === d && e === d) {
           return function(h) {
-            return a(b(h));
+            return a(c(h));
           };
         }
-        c = a.constructor;
-        if (c === b.constructor) {
-          if (c === Array) {
-            return b.concat(a);
+        b = a.constructor;
+        if (b === c.constructor) {
+          if (b === Array) {
+            return c.concat(a);
           }
-          if (c === Map) {
-            var f = new Map(b);
+          if (b === Map) {
+            var f = new Map(c);
             for (var g of a) {
               f.set(g[0], g[1]);
             }
             return f;
           }
-          if (c === Set) {
-            g = new Set(b);
+          if (b === Set) {
+            g = new Set(c);
             for (f of a.values()) {
               g.add(f);
             }
@@ -40,15 +40,15 @@ function B(a, c, b) {
       }
       return a;
     }
-    return b;
+    return c;
   }
-  return "undefined" === d ? c : a;
+  return "undefined" === d ? b : a;
 }
 function C() {
   return Object.create(null);
 }
-function aa(a, c) {
-  return c.length - a.length;
+function aa(a, b) {
+  return b.length - a.length;
 }
 function E(a) {
   return "string" === typeof a;
@@ -56,12 +56,12 @@ function E(a) {
 function H(a) {
   return "object" === typeof a;
 }
-function I(a, c) {
-  if (E(c)) {
-    a = a[c];
+function I(a, b) {
+  if (E(b)) {
+    a = a[b];
   } else {
-    for (let b = 0; a && b < c.length; b++) {
-      a = a[c[b]];
+    for (let c = 0; a && c < b.length; c++) {
+      a = a[b[c]];
     }
   }
   return a;
@@ -75,37 +75,38 @@ function I(a, c) {
 "\u03b8"], ["\u03d2", "\u03a5"], ["\u03d3", "\u03a5"], ["\u03d4", "\u03a5"], ["\u03d5", "\u03c6"], ["\u03d6", "\u03c0"], ["\u03f0", "\u03ba"], ["\u03f1", "\u03c1"], ["\u03f2", "\u03c2"], ["\u03f5", "\u03b5"], ["\u0439", "\u0438"], ["\u0450", "\u0435"], ["\u0451", "\u0435"], ["\u0453", "\u0433"], ["\u0457", "\u0456"], ["\u045c", "\u043a"], ["\u045d", "\u0438"], ["\u045e", "\u0443"], ["\u0477", "\u0475"], ["\u04c2", "\u0436"], ["\u04d1", "\u0430"], ["\u04d3", "\u0430"], ["\u04d7", "\u0435"], ["\u04db", 
 "\u04d9"], ["\u04dd", "\u0436"], ["\u04df", "\u0437"], ["\u04e3", "\u0438"], ["\u04e5", "\u0438"], ["\u04e7", "\u043e"], ["\u04eb", "\u04e9"], ["\u04ed", "\u044d"], ["\u04ef", "\u0443"], ["\u04f1", "\u0443"], ["\u04f3", "\u0443"], ["\u04f5", "\u0447"]];
 const ca = /[^\p{L}\p{N}]+/u, da = /(\d{3})/g, ea = /(\D)(\d{3})/g, fa = /(\d{3})(\D)/g, J = "".normalize && /[\u0300-\u036f]/g;
-function K(a) {
-  if (!this || this.constructor !== K) {
-    return new K(...arguments);
+function L(a) {
+  if (!this || this.constructor !== L) {
+    return new L(...arguments);
   }
-  for (let c = 0; c < arguments.length; c++) {
-    this.assign(arguments[c]);
+  for (let b = 0; b < arguments.length; b++) {
+    this.assign(arguments[b]);
   }
 }
-K.prototype.assign = function(a) {
+w = L.prototype;
+w.assign = function(a) {
   this.normalize = B(a.normalize, !0, this.normalize);
-  let c = a.include, b = c || a.exclude || a.split;
-  if ("object" === typeof b) {
-    let e = !c, d = "";
+  let b = a.include, c = b || a.exclude || a.split;
+  if ("object" === typeof c) {
+    let e = !b, d = "";
     a.include || (d += "\\p{Z}");
-    b.letter && (d += "\\p{L}");
-    b.number && (d += "\\p{N}", e = !!c);
-    b.symbol && (d += "\\p{S}");
-    b.punctuation && (d += "\\p{P}");
-    b.control && (d += "\\p{C}");
-    if (b = b.char) {
-      d += "object" === typeof b ? b.join("") : b;
+    c.letter && (d += "\\p{L}");
+    c.number && (d += "\\p{N}", e = !!b);
+    c.symbol && (d += "\\p{S}");
+    c.punctuation && (d += "\\p{P}");
+    c.control && (d += "\\p{C}");
+    if (c = c.char) {
+      d += "object" === typeof c ? c.join("") : c;
     }
     try {
-      this.split = new RegExp("[" + (c ? "^" : "") + d + "]+", "u");
+      this.split = new RegExp("[" + (b ? "^" : "") + d + "]+", "u");
     } catch (f) {
       this.split = /\s+/;
     }
     this.numeric = e;
   } else {
     try {
-      this.split = B(b, ca, this.split);
+      this.split = B(c, ca, this.split);
     } catch (e) {
       this.split = /\s+/;
     }
@@ -116,47 +117,98 @@ K.prototype.assign = function(a) {
   J || (this.mapper = new Map(ba));
   this.rtl = a.rtl || !1;
   this.dedupe = B(a.dedupe, !0, this.dedupe);
-  this.filter = B((b = a.filter) && new Set(b), null, this.filter);
-  this.matcher = B((b = a.matcher) && new Map(b), null, this.matcher);
-  this.mapper = B((b = a.mapper) && new Map(b), null, this.mapper);
-  this.stemmer = B((b = a.stemmer) && new Map(b), null, this.stemmer);
+  this.filter = B((c = a.filter) && new Set(c), null, this.filter);
+  this.matcher = B((c = a.matcher) && new Map(c), null, this.matcher);
+  this.mapper = B((c = a.mapper) && new Map(c), null, this.mapper);
+  this.stemmer = B((c = a.stemmer) && new Map(c), null, this.stemmer);
   this.replacer = B(a.replacer, null, this.replacer);
   this.minlength = B(a.minlength, 1, this.minlength);
   this.maxlength = B(a.maxlength, 0, this.maxlength);
-  if (this.cache = b = B(a.cache, !0, this.cache)) {
-    this.I = null, this.O = "number" === typeof b ? b : 2e5, this.D = new Map(), this.G = new Map(), this.J = this.A = 128;
+  if (this.cache = c = B(a.cache, !0, this.cache)) {
+    this.J = null, this.O = "number" === typeof c ? c : 2e5, this.F = new Map(), this.G = new Map(), this.L = this.K = 128;
   }
-  this.K = "";
+  this.h = "";
   this.M = null;
-  this.L = "";
+  this.D = "";
   this.N = null;
   if (this.matcher) {
     for (const e of this.matcher.keys()) {
-      this.K += (this.K ? "|" : "") + e;
+      this.h += (this.h ? "|" : "") + e;
     }
   }
   if (this.stemmer) {
     for (const e of this.stemmer.keys()) {
-      this.L += (this.L ? "|" : "") + e;
+      this.D += (this.D ? "|" : "") + e;
     }
   }
   return this;
 };
-K.prototype.encode = function(a) {
-  if (this.cache && a.length <= this.A) {
-    if (this.I) {
-      if (this.D.has(a)) {
-        return this.D.get(a);
+w.addMatcher = function(a, b) {
+  if ("object" === typeof a) {
+    return this.addReplacer(a, b);
+  }
+  if (2 > a.length) {
+    return this.addMapper(a, b);
+  }
+  this.matcher || (this.matcher = new Map());
+  this.matcher.set(a, b);
+  this.h += (this.h ? "|" : "") + a;
+  this.M = null;
+  this.cache && M(this);
+  return this;
+};
+w.addStemmer = function(a, b) {
+  this.stemmer || (this.stemmer = new Map());
+  this.stemmer.set(a, b);
+  this.D += (this.D ? "|" : "") + a;
+  this.N = null;
+  this.cache && M(this);
+  return this;
+};
+w.addFilter = function(a) {
+  this.filter || (this.filter = new Set());
+  this.filter.add(a);
+  this.cache && M(this);
+  return this;
+};
+w.addMapper = function(a, b) {
+  if ("object" === typeof a) {
+    return this.addReplacer(a, b);
+  }
+  if (1 < a.length) {
+    return this.addMatcher(a, b);
+  }
+  this.mapper || (this.mapper = new Map());
+  this.mapper.set(a, b);
+  this.cache && M(this);
+  return this;
+};
+w.addReplacer = function(a, b) {
+  "string" === typeof a && (a = new RegExp(a, "g"));
+  this.replacer || (this.replacer = []);
+  this.replacer.push(a, b || "");
+  this.cache && M(this);
+  return this;
+};
+function M(a) {
+  a.F.clear();
+  a.G.clear();
+}
+w.encode = function(a) {
+  if (this.cache && a.length <= this.K) {
+    if (this.J) {
+      if (this.F.has(a)) {
+        return this.F.get(a);
       }
     } else {
-      this.I = setTimeout(ha, 50, this);
+      this.J = setTimeout(ha, 50, this);
     }
   }
   this.normalize && (a = "function" === typeof this.normalize ? this.normalize(a) : J ? a.normalize("NFKD").replace(J, "").toLowerCase() : a.toLowerCase());
   this.prepare && (a = this.prepare(a));
   this.numeric && 3 < a.length && (a = a.replace(ea, "$1 $2").replace(fa, "$1 $2").replace(da, "$1 "));
-  const c = !(this.dedupe || this.mapper || this.filter || this.matcher || this.stemmer || this.replacer);
-  let b = [], e = this.split || "" === this.split ? a.split(this.split) : a;
+  const b = !(this.dedupe || this.mapper || this.filter || this.matcher || this.stemmer || this.replacer);
+  let c = [], e = this.split || "" === this.split ? a.split(this.split) : a;
   for (let f = 0, g, h; f < e.length; f++) {
     if (!(g = h = e[f])) {
       continue;
@@ -164,146 +216,146 @@ K.prototype.encode = function(a) {
     if (g.length < this.minlength) {
       continue;
     }
-    if (c) {
-      b.push(g);
+    if (b) {
+      c.push(g);
       continue;
     }
     if (this.filter && this.filter.has(g)) {
       continue;
     }
-    if (this.cache && g.length <= this.J) {
-      if (this.I) {
+    if (this.cache && g.length <= this.L) {
+      if (this.J) {
         var d = this.G.get(g);
         if (d || "" === d) {
-          d && b.push(d);
+          d && c.push(d);
           continue;
         }
       } else {
-        this.I = setTimeout(ha, 50, this);
+        this.J = setTimeout(ha, 50, this);
       }
     }
     let k;
-    this.stemmer && 2 < g.length && (this.N || (this.N = new RegExp("(?!^)(" + this.L + ")$")), g = g.replace(this.N, l => this.stemmer.get(l)), k = 1);
+    this.stemmer && 2 < g.length && (this.N || (this.N = new RegExp("(?!^)(" + this.D + ")$")), g = g.replace(this.N, l => this.stemmer.get(l)), k = 1);
     g && k && (g.length < this.minlength || this.filter && this.filter.has(g)) && (g = "");
     if (g && (this.mapper || this.dedupe && 1 < g.length)) {
       d = "";
-      for (let l = 0, m = "", n, t; l < g.length; l++) {
-        n = g.charAt(l), n === m && this.dedupe || ((t = this.mapper && this.mapper.get(n)) || "" === t ? t === m && this.dedupe || !(m = t) || (d += t) : d += m = n);
+      for (let l = 0, m = "", r, t; l < g.length; l++) {
+        r = g.charAt(l), r === m && this.dedupe || ((t = this.mapper && this.mapper.get(r)) || "" === t ? t === m && this.dedupe || !(m = t) || (d += t) : d += m = r);
       }
       g = d;
     }
-    this.matcher && 1 < g.length && (this.M || (this.M = new RegExp("(" + this.K + ")", "g")), g = g.replace(this.M, l => this.matcher.get(l)));
+    this.matcher && 1 < g.length && (this.M || (this.M = new RegExp("(" + this.h + ")", "g")), g = g.replace(this.M, l => this.matcher.get(l)));
     if (g && this.replacer) {
       for (d = 0; g && d < this.replacer.length; d += 2) {
         g = g.replace(this.replacer[d], this.replacer[d + 1]);
       }
     }
-    this.cache && h.length <= this.J && (this.G.set(h, g), this.G.size > this.O && (this.G.clear(), this.J = this.J / 1.1 | 0));
-    g && b.push(g);
+    this.cache && h.length <= this.L && (this.G.set(h, g), this.G.size > this.O && (this.G.clear(), this.L = this.L / 1.1 | 0));
+    g && c.push(g);
   }
-  this.finalize && (b = this.finalize(b) || b);
-  this.cache && a.length <= this.A && (this.D.set(a, b), this.D.size > this.O && (this.D.clear(), this.A = this.A / 1.1 | 0));
-  return b;
+  this.finalize && (c = this.finalize(c) || c);
+  this.cache && a.length <= this.K && (this.F.set(a, c), this.F.size > this.O && (this.F.clear(), this.K = this.K / 1.1 | 0));
+  return c;
 };
 function ha(a) {
-  a.I = null;
-  a.D.clear();
+  a.J = null;
+  a.F.clear();
   a.G.clear();
 }
 ;function ia(a) {
-  M.call(a, "add");
-  M.call(a, "append");
-  M.call(a, "search");
-  M.call(a, "update");
-  M.call(a, "remove");
+  N.call(a, "add");
+  N.call(a, "append");
+  N.call(a, "search");
+  N.call(a, "update");
+  N.call(a, "remove");
 }
-function M(a) {
+function N(a) {
   this[a + "Async"] = function() {
-    var c = arguments;
-    const b = c[c.length - 1];
+    var b = arguments;
+    const c = b[b.length - 1];
     let e;
-    "function" === typeof b && (e = b, delete c[c.length - 1]);
-    c = this[a].apply(this, c);
-    e && (c.then ? c.then(e) : e(c));
-    return c;
+    "function" === typeof c && (e = c, delete b[b.length - 1]);
+    b = this[a].apply(this, b);
+    e && (b.then ? b.then(e) : e(b));
+    return b;
   };
 }
-;function N(a, c = 0) {
-  let b = [], e = [];
-  c && (c = 250000 / c * 5000 | 0);
+;function O(a, b = 0) {
+  let c = [], e = [];
+  b && (b = 250000 / b * 5000 | 0);
   for (const d of a.entries()) {
-    e.push(d), e.length === c && (b.push(e), e = []);
-  }
-  e.length && b.push(e);
-  return b;
-}
-function O(a, c) {
-  c || (c = new Map());
-  for (let b = 0, e; b < a.length; b++) {
-    e = a[b], c.set(e[0], e[1]);
+    e.push(d), e.length === b && (c.push(e), e = []);
   }
+  e.length && c.push(e);
   return c;
 }
-function ja(a, c = 0) {
-  let b = [], e = [];
-  c && (c = 250000 / c * 1000 | 0);
-  for (const d of a.entries()) {
-    e.push([d[0], N(d[1])[0]]), e.length === c && (b.push(e), e = []);
+function P(a, b) {
+  b || (b = new Map());
+  for (let c = 0, e; c < a.length; c++) {
+    e = a[c], b.set(e[0], e[1]);
   }
-  e.length && b.push(e);
   return b;
 }
-function ka(a, c) {
-  c || (c = new Map());
-  for (let b = 0, e, d; b < a.length; b++) {
-    e = a[b], d = c.get(e[0]), c.set(e[0], O(e[1], d));
+function ja(a, b = 0) {
+  let c = [], e = [];
+  b && (b = 250000 / b * 1000 | 0);
+  for (const d of a.entries()) {
+    e.push([d[0], O(d[1])[0]]), e.length === b && (c.push(e), e = []);
   }
+  e.length && c.push(e);
   return c;
 }
+function ka(a, b) {
+  b || (b = new Map());
+  for (let c = 0, e, d; c < a.length; c++) {
+    e = a[c], d = b.get(e[0]), b.set(e[0], P(e[1], d));
+  }
+  return b;
+}
 function la(a) {
-  let c = [], b = [];
+  let b = [], c = [];
   for (const e of a.keys()) {
-    b.push(e), 250000 === b.length && (c.push(b), b = []);
+    c.push(e), 250000 === c.length && (b.push(c), c = []);
   }
-  b.length && c.push(b);
-  return c;
+  c.length && b.push(c);
+  return b;
 }
-function ma(a, c) {
-  c || (c = new Set());
-  for (let b = 0; b < a.length; b++) {
-    c.add(a[b]);
+function ma(a, b) {
+  b || (b = new Set());
+  for (let c = 0; c < a.length; c++) {
+    b.add(a[c]);
   }
-  return c;
+  return b;
 }
-function P(a, c, b, e, d, f, g = 0) {
+function Q(a, b, c, e, d, f, g = 0) {
   const h = e && e.constructor === Array;
   var k = h ? e.shift() : e;
   if (!k) {
-    return this.export(a, c, d, f + 1);
+    return this.export(a, b, d, f + 1);
   }
-  if ((k = a((c ? c + "." : "") + (g + 1) + "." + b, JSON.stringify(k))) && k.then) {
+  if ((k = a((b ? b + "." : "") + (g + 1) + "." + c, JSON.stringify(k))) && k.then) {
     const l = this;
     return k.then(function() {
-      return P.call(l, a, c, b, h ? e : null, d, f, g + 1);
+      return Q.call(l, a, b, c, h ? e : null, d, f, g + 1);
     });
   }
-  return P.call(this, a, c, b, h ? e : null, d, f, g + 1);
+  return Q.call(this, a, b, c, h ? e : null, d, f, g + 1);
 }
-;Q.prototype.add = function(a, c, b) {
-  H(a) && (c = a, a = I(c, this.key));
-  if (c && (a || 0 === a)) {
-    if (!b && this.reg.has(a)) {
-      return this.update(a, c);
+;R.prototype.add = function(a, b, c) {
+  H(a) && (b = a, a = I(b, this.key));
+  if (b && (a || 0 === a)) {
+    if (!c && this.reg.has(a)) {
+      return this.update(a, b);
     }
     for (let h = 0, k; h < this.field.length; h++) {
       k = this.C[h];
       var e = this.index.get(this.field[h]);
       if ("function" === typeof k) {
-        var d = k(c);
+        var d = k(b);
         d && e.add(a, d, !1, !0);
       } else {
-        if (d = k.F, !d || d(c)) {
-          k.constructor === String ? k = ["" + k] : E(k) && (k = [k]), R(c, k, this.H, 0, e, a, k[0], b);
+        if (d = k.H, !d || d(b)) {
+          k.constructor === String ? k = ["" + k] : E(k) && (k = [k]), na(b, k, this.I, 0, e, a, k[0], c);
         }
       }
     }
@@ -313,76 +365,76 @@ function P(a, c, b, e, d, f, g = 0) {
         d = this.tag.get(g);
         let h = C();
         if ("function" === typeof f) {
-          if (f = f(c), !f) {
+          if (f = f(b), !f) {
             continue;
           }
         } else {
-          const k = f.F;
-          if (k && !k(c)) {
+          const k = f.H;
+          if (k && !k(b)) {
             continue;
           }
           f.constructor === String && (f = "" + f);
-          f = I(c, f);
+          f = I(b, f);
         }
         if (d && f) {
           E(f) && (f = [f]);
           for (let k = 0, l, m; k < f.length; k++) {
-            l = f[k], h[l] || (h[l] = 1, (g = d.get(l)) ? m = g : d.set(l, m = []), b && m.includes(a) || (m.push(a), this.fastupdate && ((g = this.reg.get(a)) ? g.push(m) : this.reg.set(a, [m]))));
+            l = f[k], h[l] || (h[l] = 1, (g = d.get(l)) ? m = g : d.set(l, m = []), c && m.includes(a) || (m.push(a), this.fastupdate && ((g = this.reg.get(a)) ? g.push(m) : this.reg.set(a, [m]))));
           }
         } else {
           d || console.warn("Tag '" + g + "' was not found");
         }
       }
     }
-    if (this.store && (!b || !this.store.has(a))) {
+    if (this.store && (!c || !this.store.has(a))) {
       let h;
-      if (this.h) {
+      if (this.A) {
         h = C();
-        for (let k = 0, l; k < this.h.length; k++) {
-          l = this.h[k];
-          if ((b = l.F) && !b(c)) {
+        for (let k = 0, l; k < this.A.length; k++) {
+          l = this.A[k];
+          if ((c = l.H) && !c(b)) {
             continue;
           }
           let m;
           if ("function" === typeof l) {
-            m = l(c);
+            m = l(b);
             if (!m) {
               continue;
             }
             l = [l.S];
           } else if (E(l) || l.constructor === String) {
-            h[l] = c[l];
+            h[l] = b[l];
             continue;
           }
-          na(c, h, l, 0, l[0], m);
+          oa(b, h, l, 0, l[0], m);
         }
       }
-      this.store.set(a, h || c);
+      this.store.set(a, h || b);
     }
   }
   return this;
 };
-function na(a, c, b, e, d, f) {
+function oa(a, b, c, e, d, f) {
   a = a[d];
-  if (e === b.length - 1) {
-    c[d] = f || a;
+  if (e === c.length - 1) {
+    b[d] = f || a;
   } else if (a) {
     if (a.constructor === Array) {
-      for (c = c[d] = Array(a.length), d = 0; d < a.length; d++) {
-        na(a, c, b, e, d);
+      for (b = b[d] = Array(a.length), d = 0; d < a.length; d++) {
+        oa(a, b, c, e, d);
       }
     } else {
-      c = c[d] || (c[d] = C()), d = b[++e], na(a, c, b, e, d);
+      b = b[d] || (b[d] = C()), d = c[++e], oa(a, b, c, e, d);
     }
   }
 }
-function R(a, c, b, e, d, f, g, h) {
+function na(a, b, c, e, d, f, g, h) {
   if (a = a[g]) {
-    if (e === c.length - 1) {
+    if (e === b.length - 1) {
       if (a.constructor === Array) {
-        if (b[e]) {
-          for (c = 0; c < a.length; c++) {
-            d.add(f, a[c], !0, !0);
+        if (c[e]) {
+          for (b = 0; b < a.length; b++) {
+            d.add(f, a[b], !0, !0);
           }
           return;
         }
@@ -392,66 +444,66 @@ function R(a, c, b, e, d, f, g, h) {
     } else {
       if (a.constructor === Array) {
         for (g = 0; g < a.length; g++) {
-          R(a, c, b, e, d, f, g, h);
+          na(a, b, c, e, d, f, g, h);
         }
       } else {
-        g = c[++e], R(a, c, b, e, d, f, g, h);
+        g = b[++e], na(a, b, c, e, d, f, g, h);
       }
     }
   }
 }
-;function oa(a, c) {
-  const b = C(), e = [];
-  for (let d = 0, f; d < c.length; d++) {
-    f = c[d];
+;function pa(a, b) {
+  const c = C(), e = [];
+  for (let d = 0, f; d < b.length; d++) {
+    f = b[d];
     for (let g = 0; g < f.length; g++) {
-      b[f[g]] = 1;
+      c[f[g]] = 1;
     }
   }
   for (let d = 0, f; d < a.length; d++) {
-    f = a[d], 1 === b[f] && (e.push(f), b[f] = 2);
+    f = a[d], 1 === c[f] && (e.push(f), c[f] = 2);
   }
   return e;
 }
-;Q.prototype.search = function(a, c, b, e) {
-  b || (!c && H(a) ? (b = a, a = "") : H(c) && (b = c, c = 0));
+;R.prototype.search = function(a, b, c, e) {
+  c || (!b && H(a) ? (c = a, a = "") : H(b) && (c = b, b = 0));
   let d = [];
   var f = [];
-  let g, h, k, l, m, n, t = 0, p;
-  if (b) {
-    b.constructor === Array && (b = {index:b});
-    a = b.query || a;
-    var r = b.pluck;
-    h = b.merge;
-    l = r || b.field || b.index;
-    m = this.tag && b.tag;
-    g = this.store && b.enrich;
-    k = b.suggest;
-    p = b.highlight;
-    c = b.limit || c;
-    n = b.offset || 0;
-    c || (c = 100);
+  let g, h, k, l, m, r, t = 0, q;
+  if (c) {
+    c.constructor === Array && (c = {index:c});
+    a = c.query || a;
+    var n = c.pluck;
+    h = c.merge;
+    l = n || c.field || c.index;
+    m = this.tag && c.tag;
+    g = this.store && c.enrich;
+    k = c.suggest;
+    q = c.highlight;
+    b = c.limit || b;
+    r = c.offset || 0;
+    b || (b = 100);
     if (m) {
       m.constructor !== Array && (m = [m]);
       var u = [];
-      for (let w = 0, q; w < m.length; w++) {
-        q = m[w];
-        if (E(q)) {
+      for (let x = 0, p; x < m.length; x++) {
+        p = m[x];
+        if (E(p)) {
           throw Error("A tag option can't be a string, instead it needs a { field: tag } format.");
         }
-        if (q.field && q.tag) {
-          var v = q.tag;
+        if (p.field && p.tag) {
+          var v = p.tag;
           if (v.constructor === Array) {
             for (var y = 0; y < v.length; y++) {
-              u.push(q.field, v[y]);
+              u.push(p.field, v[y]);
             }
           } else {
-            u.push(q.field, v);
+            u.push(p.field, v);
           }
         } else {
-          v = Object.keys(q);
+          v = Object.keys(p);
           for (let D = 0, A, z; D < v.length; D++) {
-            if (A = v[D], z = q[A], z.constructor === Array) {
+            if (A = v[D], z = p[A], z.constructor === Array) {
               for (y = 0; y < z.length; y++) {
                 u.push(A, z[y]);
               }
@@ -469,12 +521,12 @@ function R(a, c, b, e, d, f, g, h) {
         e = [];
         if (u.length) {
           for (f = 0; f < u.length; f += 2) {
-            r = pa.call(this, u[f], u[f + 1], c, n, g), d.push({field:u[f], tag:u[f + 1], result:r});
+            n = qa.call(this, u[f], u[f + 1], b, r, g), d.push({field:u[f], tag:u[f + 1], result:n});
           }
         }
-        return e.length ? Promise.all(e).then(function(w) {
-          for (let q = 0; q < w.length; q++) {
-            d[q].result = w[q];
+        return e.length ? Promise.all(e).then(function(x) {
+          for (let p = 0; p < x.length; p++) {
+            d[p].result = x[p];
           }
           return d;
         }) : d;
@@ -484,26 +536,26 @@ function R(a, c, b, e, d, f, g, h) {
   }
   l || (l = this.field);
   u = !e && (this.worker || this.db) && [];
-  for (let w = 0, q, D, A; w < l.length; w++) {
-    D = l[w];
+  for (let x = 0, p, D, A; x < l.length; x++) {
+    D = l[x];
     let z;
-    E(D) || (z = D, D = z.field, a = z.query || a, c = z.limit || c, n = z.offset || n, k = z.suggest || k, g = this.store && (z.enrich || g));
+    E(D) || (z = D, D = z.field, a = z.query || a, b = z.limit || b, r = z.offset || r, k = z.suggest || k, g = this.store && (z.enrich || g));
     if (e) {
-      q = e[w];
+      p = e[x];
     } else {
-      if (v = z || b, y = this.index.get(D), m && (v.enrich = !1), u) {
-        u[w] = y.search(a, c, v);
+      if (v = z || c, y = this.index.get(D), m && (v.enrich = !1), u) {
+        u[x] = y.search(a, b, v);
         v && g && (v.enrich = g);
         continue;
       } else {
-        q = y.search(a, c, v), v && g && (v.enrich = g);
+        p = y.search(a, b, v), v && g && (v.enrich = g);
       }
     }
-    A = q && q.length;
+    A = p && p.length;
     if (m && A) {
       v = [];
       y = 0;
-      for (let G = 0, F, L; G < m.length; G += 2) {
+      for (let G = 0, F, K; G < m.length; G += 2) {
         F = this.tag.get(m[G]);
         if (!F) {
           if (console.warn("Tag '" + m[G] + ":" + m[G + 1] + "' will be skipped because there is no field '" + m[G] + "'."), k) {
@@ -512,15 +564,15 @@ function R(a, c, b, e, d, f, g, h) {
             return d;
           }
         }
-        if (L = (F = F && F.get(m[G + 1])) && F.length) {
+        if (K = (F = F && F.get(m[G + 1])) && F.length) {
           y++, v.push(F);
         } else if (!k) {
           return d;
         }
       }
       if (y) {
-        q = oa(q, v);
-        A = q.length;
+        p = pa(p, v);
+        A = p.length;
         if (!A && !k) {
           return d;
         }
@@ -528,52 +580,52 @@ function R(a, c, b, e, d, f, g, h) {
       }
     }
     if (A) {
-      f[t] = D, d.push(q), t++;
+      f[t] = D, d.push(p), t++;
     } else if (1 === l.length) {
       return d;
     }
   }
   if (u) {
-    const w = this;
-    return Promise.all(u).then(function(q) {
-      return q.length ? w.search(a, c, b, q) : q;
+    const x = this;
+    return Promise.all(u).then(function(p) {
+      return p.length ? x.search(a, b, c, p) : p;
     });
   }
   if (!t) {
     return d;
   }
-  if (r && (!g || !this.store)) {
+  if (n && (!g || !this.store)) {
     return d[0];
   }
   u = [];
-  for (let w = 0, q; w < f.length; w++) {
-    q = d[w];
-    g && q.length && !q[0].doc && q.length && (q = qa.call(this, q));
-    if (r) {
-      return q;
+  for (let x = 0, p; x < f.length; x++) {
+    p = d[x];
+    g && p.length && !p[0].doc && p.length && (p = ra.call(this, p));
+    if (n) {
+      return p;
     }
-    d[w] = {field:f[w], result:q};
+    d[x] = {field:f[x], result:p};
   }
-  return h ? ra(d, c) : p ? sa(d, a, this.index, this.field, this.C, p) : d;
+  return h ? sa(d, b) : q ? ta(d, a, this.index, this.field, this.C, q) : d;
 };
-function sa(a, c, b, e, d, f) {
+function ta(a, b, c, e, d, f) {
   let g, h, k;
-  for (let m = 0, n, t, p, r, u; m < a.length; m++) {
-    n = a[m].result;
+  for (let m = 0, r, t, q, n, u; m < a.length; m++) {
+    r = a[m].result;
     t = a[m].field;
-    r = b.get(t);
-    p = r.encoder;
-    k = r.tokenize;
+    n = c.get(t);
+    q = n.encoder;
+    k = n.tokenize;
     u = d[e.indexOf(t)];
-    p !== g && (g = p, h = g.encode(c));
-    for (let v = 0; v < n.length; v++) {
+    q !== g && (g = q, h = g.encode(b));
+    for (let v = 0; v < r.length; v++) {
       let y = "";
-      var l = I(n[v].doc, u);
-      let w = g.encode(l);
+      var l = I(r[v].doc, u);
+      let x = g.encode(l);
       l = l.split(g.split);
-      for (let q = 0, D, A; q < w.length; q++) {
-        D = w[q];
-        A = l[q];
+      for (let p = 0, D, A; p < x.length; p++) {
+        D = x[p];
+        A = l[p];
         let z;
         for (let G = 0, F; G < h.length; G++) {
           if (F = h[G], "strict" === k) {
@@ -583,23 +635,23 @@ function sa(a, c, b, e, d, f) {
               break;
             }
           } else {
-            const L = D.indexOf(F);
-            if (-1 < L) {
-              y += (y ? " " : "") + A.substring(0, L) + f.replace("$1", A.substring(L, F.length)) + A.substring(L + F.length);
+            const K = D.indexOf(F);
+            if (-1 < K) {
+              y += (y ? " " : "") + A.substring(0, K) + f.replace("$1", A.substring(K, F.length)) + A.substring(K + F.length);
               z = !0;
               break;
             }
           }
         }
-        z || (y += (y ? " " : "") + l[q]);
+        z || (y += (y ? " " : "") + l[p]);
       }
-      n[v].highlight = y;
+      r[v].highlight = y;
     }
   }
   return a;
 }
-function ra(a, c) {
-  const b = [], e = C();
+function sa(a, b) {
+  const c = [], e = C();
   for (let d = 0, f, g; d < a.length; d++) {
     f = a[d];
     g = f.result;
@@ -607,112 +659,112 @@ function ra(a, c) {
       if (l = g[h], k = l.id, m = e[k]) {
         m.push(f.field);
       } else {
-        if (b.length === c) {
-          return b;
+        if (c.length === b) {
+          return c;
         }
         l.field = e[k] = [f.field];
-        b.push(l);
+        c.push(l);
       }
     }
   }
-  return b;
+  return c;
 }
-function pa(a, c, b, e, d) {
+function qa(a, b, c, e, d) {
   let f = this.tag.get(a);
   if (!f) {
     return console.warn("Tag '" + a + "' was not found"), [];
   }
-  if ((a = (f = f && f.get(c)) && f.length - e) && 0 < a) {
-    if (a > b || e) {
-      f = f.slice(e, e + b);
+  if ((a = (f = f && f.get(b)) && f.length - e) && 0 < a) {
+    if (a > c || e) {
+      f = f.slice(e, e + c);
     }
-    d && (f = qa.call(this, f));
+    d && (f = ra.call(this, f));
     return f;
   }
 }
-function qa(a) {
-  const c = Array(a.length);
-  for (let b = 0, e; b < a.length; b++) {
-    e = a[b], c[b] = {id:e, doc:this.store.get(e)};
+function ra(a) {
+  const b = Array(a.length);
+  for (let c = 0, e; c < a.length; c++) {
+    e = a[c], b[c] = {id:e, doc:this.store.get(e)};
   }
-  return c;
+  return b;
 }
-;function Q(a) {
-  if (!this || this.constructor !== Q) {
-    return new Q(a);
+;function R(a) {
+  if (!this || this.constructor !== R) {
+    return new R(a);
   }
-  const c = a.document || a.doc || a;
-  var b;
+  const b = a.document || a.doc || a;
+  var c;
   this.C = [];
   this.field = [];
-  this.H = [];
-  this.key = (b = c.key || c.id) && S(b, this.H) || "id";
+  this.I = [];
+  this.key = (c = b.key || b.id) && S(c, this.I) || "id";
   this.reg = (this.fastupdate = !!a.fastupdate) ? new Map() : new Set();
-  this.h = (b = c.store || null) && !0 !== b && [];
-  this.store = b && new Map();
-  this.cache = (b = a.cache || null) && new T(b);
+  this.A = (c = b.store || null) && c && !0 !== c && [];
+  this.store = c && new Map();
+  this.cache = (c = a.cache || null) && new T(c);
   a.cache = !1;
-  b = new Map();
-  let e = c.index || c.field || c;
+  c = new Map();
+  let e = b.index || b.field || b;
   E(e) && (e = [e]);
   for (let d = 0, f, g; d < e.length; d++) {
-    f = e[d], E(f) || (g = f, f = f.field), g = H(g) ? Object.assign({}, a, g) : a, b.set(f, new U(g, this.reg)), g.custom ? this.C[d] = g.custom : (this.C[d] = S(f, this.H), g.filter && ("string" === typeof this.C[d] && (this.C[d] = new String(this.C[d])), this.C[d].F = g.filter)), this.field[d] = f;
+    f = e[d], E(f) || (g = f, f = f.field), g = H(g) ? Object.assign({}, a, g) : a, c.set(f, new U(g, this.reg)), g.custom ? this.C[d] = g.custom : (this.C[d] = S(f, this.I), g.filter && ("string" === typeof this.C[d] && (this.C[d] = new String(this.C[d])), this.C[d].H = g.filter)), this.field[d] = f;
   }
-  if (this.h) {
-    a = c.store;
+  if (this.A) {
+    a = b.store;
     E(a) && (a = [a]);
     for (let d = 0, f, g; d < a.length; d++) {
-      f = a[d], g = f.field || f, f.custom ? (this.h[d] = f.custom, f.custom.S = g) : (this.h[d] = S(g, this.H), f.filter && ("string" === typeof this.h[d] && (this.h[d] = new String(this.h[d])), this.h[d].F = f.filter));
+      f = a[d], g = f.field || f, f.custom ? (this.A[d] = f.custom, f.custom.S = g) : (this.A[d] = S(g, this.I), f.filter && ("string" === typeof this.A[d] && (this.A[d] = new String(this.A[d])), this.A[d].H = f.filter));
     }
   }
-  this.index = b;
+  this.index = c;
   this.tag = null;
-  if (b = c.tag) {
-    if ("string" === typeof b && (b = [b]), b.length) {
+  if (c = b.tag) {
+    if ("string" === typeof c && (c = [c]), c.length) {
       this.tag = new Map();
       this.B = [];
       this.R = [];
-      for (let d = 0, f, g; d < b.length; d++) {
-        f = b[d];
+      for (let d = 0, f, g; d < c.length; d++) {
+        f = c[d];
         g = f.field || f;
         if (!g) {
           throw Error("The tag field from the document descriptor is undefined.");
         }
-        f.custom ? this.B[d] = f.custom : (this.B[d] = S(g, this.H), f.filter && ("string" === typeof this.B[d] && (this.B[d] = new String(this.B[d])), this.B[d].F = f.filter));
+        f.custom ? this.B[d] = f.custom : (this.B[d] = S(g, this.I), f.filter && ("string" === typeof this.B[d] && (this.B[d] = new String(this.B[d])), this.B[d].H = f.filter));
         this.R[d] = g;
         this.tag.set(g, new Map());
       }
     }
   }
 }
-function S(a, c) {
-  const b = a.split(":");
+function S(a, b) {
+  const c = a.split(":");
   let e = 0;
-  for (let d = 0; d < b.length; d++) {
-    a = b[d], "]" === a[a.length - 1] && (a = a.substring(0, a.length - 2)) && (c[e] = !0), a && (b[e++] = a);
+  for (let d = 0; d < c.length; d++) {
+    a = c[d], "]" === a[a.length - 1] && (a = a.substring(0, a.length - 2)) && (b[e] = !0), a && (c[e++] = a);
   }
-  e < b.length && (b.length = e);
-  return 1 < e ? b : b[0];
+  e < c.length && (c.length = e);
+  return 1 < e ? c : c[0];
 }
-x = Q.prototype;
-x.append = function(a, c) {
-  return this.add(a, c, !0);
+w = R.prototype;
+w.append = function(a, b) {
+  return this.add(a, b, !0);
 };
-x.update = function(a, c) {
-  return this.remove(a).add(a, c);
+w.update = function(a, b) {
+  return this.remove(a).add(a, b);
 };
-x.remove = function(a) {
+w.remove = function(a) {
   H(a) && (a = I(a, this.key));
-  for (var c of this.index.values()) {
-    c.remove(a, !0);
+  for (var b of this.index.values()) {
+    b.remove(a, !0);
   }
   if (this.reg.has(a)) {
     if (this.tag && !this.fastupdate) {
-      for (let b of this.tag.values()) {
-        for (let e of b) {
-          c = e[0];
+      for (let c of this.tag.values()) {
+        for (let e of c) {
+          b = e[0];
           const d = e[1], f = d.indexOf(a);
-          -1 < f && (1 < d.length ? d.splice(f, 1) : b.delete(c));
+          -1 < f && (1 < d.length ? d.splice(f, 1) : c.delete(b));
         }
       }
     }
@@ -722,7 +774,7 @@ x.remove = function(a) {
   this.cache && this.cache.remove(a);
   return this;
 };
-x.clear = function() {
+w.clear = function() {
   for (const a of this.index.values()) {
     a.clear();
   }
@@ -734,93 +786,93 @@ x.clear = function() {
   this.store && this.store.clear();
   return this;
 };
-x.contain = function(a) {
+w.contain = function(a) {
   return this.reg.has(a);
 };
-x.cleanup = function() {
+w.cleanup = function() {
   for (const a of this.index.values()) {
     a.cleanup();
   }
   return this;
 };
-x.get = function(a) {
+w.get = function(a) {
   return this.store.get(a);
 };
-x.set = function(a, c) {
-  this.store.set(a, c);
+w.set = function(a, b) {
+  this.store.set(a, b);
   return this;
 };
-x.searchCache = ta;
-x.export = function(a, c, b = 0, e = 0) {
-  if (b < this.field.length) {
-    const g = this.field[b];
-    if ((c = this.index.get(g).export(a, g, b, e = 1)) && c.then) {
+w.searchCache = ua;
+w.export = function(a, b, c = 0, e = 0) {
+  if (c < this.field.length) {
+    const g = this.field[c];
+    if ((b = this.index.get(g).export(a, g, c, e = 1)) && b.then) {
       const h = this;
-      return c.then(function() {
-        return h.export(a, g, b + 1);
+      return b.then(function() {
+        return h.export(a, g, c + 1);
       });
     }
-    return this.export(a, g, b + 1);
+    return this.export(a, g, c + 1);
   }
   let d, f;
   switch(e) {
     case 0:
       d = "reg";
       f = la(this.reg);
-      c = null;
+      b = null;
       break;
     case 1:
       d = "tag";
       f = ja(this.tag, this.reg.size);
-      c = null;
+      b = null;
       break;
     case 2:
       d = "doc";
-      f = N(this.store);
-      c = null;
+      f = O(this.store);
+      b = null;
       break;
     case 3:
       d = "cfg";
       f = {};
-      c = null;
+      b = null;
       break;
     default:
       return;
   }
-  return P.call(this, a, c, d, f, b, e);
+  return Q.call(this, a, b, d, f, c, e);
 };
-x.import = function(a, c) {
-  if (c) {
-    E(c) && (c = JSON.parse(c));
+w.import = function(a, b) {
+  if (b) {
+    E(b) && (b = JSON.parse(b));
     a = a.split(".");
     "json" === a[a.length - 1] && a.pop();
-    var b = 2 < a.length ? a[0] : "";
+    var c = 2 < a.length ? a[0] : "";
     a = 2 < a.length ? a[2] : a[1];
-    if (b) {
-      return this.index.get(b).import(a, c);
+    if (c) {
+      return this.index.get(c).import(a, b);
     }
     switch(a) {
       case "reg":
         this.fastupdate = !1;
-        this.reg = ma(c, this.reg);
+        this.reg = ma(b, this.reg);
         for (let e = 0, d; e < this.field.length; e++) {
           d = this.index.get(this.field[e]), d.fastupdate = !1, d.reg = this.reg;
         }
         break;
       case "tag":
-        this.tag = ka(c, this.tag);
+        this.tag = ka(b, this.tag);
         break;
       case "doc":
-        this.store = O(c, this.store);
+        this.store = P(b, this.store);
     }
   }
 };
-ia(Q.prototype);
-function ta(a, c, b) {
+ia(R.prototype);
+function ua(a, b, c) {
   a = ("object" === typeof a ? "" + a.query : a).toLowerCase();
   let e = this.cache.get(a);
   if (!e) {
-    e = this.search(a, c, b);
+    e = this.search(a, b, c);
     if (e.then) {
       const d = this;
       e.then(function(f) {
@@ -835,74 +887,74 @@ function ta(a, c, b) {
 function T(a) {
   this.limit = a && !0 !== a ? a : 1000;
   this.cache = new Map();
-  this.A = "";
+  this.h = "";
 }
-T.prototype.set = function(a, c) {
-  this.cache.set(this.A = a, c);
+T.prototype.set = function(a, b) {
+  this.cache.set(this.h = a, b);
   this.cache.size > this.limit && this.cache.delete(this.cache.keys().next().value);
 };
 T.prototype.get = function(a) {
-  const c = this.cache.get(a);
-  c && this.A !== a && (this.cache.delete(a), this.cache.set(this.A = a, c));
-  return c;
+  const b = this.cache.get(a);
+  b && this.h !== a && (this.cache.delete(a), this.cache.set(this.h = a, b));
+  return b;
 };
 T.prototype.remove = function(a) {
-  for (const c of this.cache) {
-    const b = c[0];
-    c[1].includes(a) && this.cache.delete(b);
+  for (const b of this.cache) {
+    const c = b[0];
+    b[1].includes(a) && this.cache.delete(c);
   }
 };
 T.prototype.clear = function() {
   this.cache.clear();
-  this.A = "";
+  this.h = "";
 };
-const ua = {normalize:function(a) {
+const va = {normalize:function(a) {
   return a.toLowerCase();
 }, dedupe:!1};
-const va = new Map([["b", "p"], ["v", "f"], ["w", "f"], ["z", "s"], ["x", "s"], ["d", "t"], ["n", "m"], ["c", "k"], ["g", "k"], ["j", "k"], ["q", "k"], ["i", "e"], ["y", "e"], ["u", "o"]]);
-const wa = new Map([["ae", "a"], ["oe", "o"], ["sh", "s"], ["kh", "k"], ["th", "t"], ["pf", "f"]]), xa = [/([^aeo])h(.)/g, "$1$2", /([aeo])h([^aeo]|$)/g, "$1$2", /([^0-9])\1+/g, "$1"];
-const ya = {a:"", e:"", i:"", o:"", u:"", y:"", b:1, f:1, p:1, v:1, c:2, g:2, j:2, k:2, q:2, s:2, x:2, z:2, "\u00df":2, d:3, t:3, l:4, m:5, n:5, r:6};
-const za = /[\x00-\x7F]+/g;
+const wa = new Map([["b", "p"], ["v", "f"], ["w", "f"], ["z", "s"], ["x", "s"], ["d", "t"], ["n", "m"], ["c", "k"], ["g", "k"], ["j", "k"], ["q", "k"], ["i", "e"], ["y", "e"], ["u", "o"]]);
+const xa = new Map([["ae", "a"], ["oe", "o"], ["sh", "s"], ["kh", "k"], ["th", "t"], ["pf", "f"]]), ya = [/([^aeo])h(.)/g, "$1$2", /([aeo])h([^aeo]|$)/g, "$1$2", /([^0-9])\1+/g, "$1"];
+const za = {a:"", e:"", i:"", o:"", u:"", y:"", b:1, f:1, p:1, v:1, c:2, g:2, j:2, k:2, q:2, s:2, x:2, z:2, "\u00df":2, d:3, t:3, l:4, m:5, n:5, r:6};
 const Aa = /[\x00-\x7F]+/g;
 const Ba = /[\x00-\x7F]+/g;
-var Ca = {LatinExact:{normalize:!1, dedupe:!1}, LatinDefault:ua, LatinSimple:{normalize:!0, dedupe:!0}, LatinBalance:{normalize:!0, dedupe:!0, mapper:va}, LatinAdvanced:{normalize:!0, dedupe:!0, mapper:va, matcher:wa, replacer:xa}, LatinExtra:{normalize:!0, dedupe:!0, mapper:va, replacer:xa.concat([/(?!^)[aeo]/g, ""]), matcher:wa}, LatinSoundex:{normalize:!0, dedupe:!1, include:{letter:!0}, finalize:function(a) {
-  for (let b = 0; b < a.length; b++) {
-    var c = a[b];
-    let e = c.charAt(0), d = ya[e];
-    for (let f = 1, g; f < c.length && (g = c.charAt(f), "h" === g || "w" === g || !(g = ya[g]) || g === d || (e += g, d = g, 4 !== e.length)); f++) {
+const Ca = /[\x00-\x7F]+/g;
+var Da = {LatinExact:{normalize:!1, dedupe:!1}, LatinDefault:va, LatinSimple:{normalize:!0, dedupe:!0}, LatinBalance:{normalize:!0, dedupe:!0, mapper:wa}, LatinAdvanced:{normalize:!0, dedupe:!0, mapper:wa, matcher:xa, replacer:ya}, LatinExtra:{normalize:!0, dedupe:!0, mapper:wa, replacer:ya.concat([/(?!^)[aeo]/g, ""]), matcher:xa}, LatinSoundex:{normalize:!0, dedupe:!1, include:{letter:!0}, finalize:function(a) {
+  for (let c = 0; c < a.length; c++) {
+    var b = a[c];
+    let e = b.charAt(0), d = za[e];
+    for (let f = 1, g; f < b.length && (g = b.charAt(f), "h" === g || "w" === g || !(g = za[g]) || g === d || (e += g, d = g, 4 !== e.length)); f++) {
     }
-    a[b] = e;
+    a[c] = e;
   }
 }}, ArabicDefault:{rtl:!0, normalize:!1, dedupe:!0, prepare:function(a) {
-  return ("" + a).replace(za, " ");
+  return ("" + a).replace(Aa, " ");
 }}, CjkDefault:{normalize:!1, dedupe:!0, split:"", prepare:function(a) {
-  return ("" + a).replace(Aa, "");
+  return ("" + a).replace(Ba, "");
 }}, CyrillicDefault:{normalize:!1, dedupe:!0, prepare:function(a) {
-  return ("" + a).replace(Ba, " ");
+  return ("" + a).replace(Ca, " ");
 }}};
-const Da = {memory:{resolution:1}, performance:{resolution:6, fastupdate:!0, context:{depth:1, resolution:3}}, match:{tokenize:"forward"}, score:{resolution:9, context:{depth:2, resolution:9}}};
+const Ea = {memory:{resolution:1}, performance:{resolution:6, fastupdate:!0, context:{depth:1, resolution:3}}, match:{tokenize:"forward"}, score:{resolution:9, context:{depth:2, resolution:9}}};
 C();
-U.prototype.add = function(a, c, b, e) {
-  if (c && (a || 0 === a)) {
-    if (!e && !b && this.reg.has(a)) {
-      return this.update(a, c);
+U.prototype.add = function(a, b, c, e) {
+  if (b && (a || 0 === a)) {
+    if (!e && !c && this.reg.has(a)) {
+      return this.update(a, b);
     }
-    c = this.encoder.encode(c);
-    if (e = c.length) {
-      const l = C(), m = C(), n = this.depth, t = this.resolution;
-      for (let p = 0; p < e; p++) {
-        let r = c[this.rtl ? e - 1 - p : p];
-        var d = r.length;
-        if (d && (n || !m[r])) {
-          var f = this.score ? this.score(c, r, p, null, 0) : V(t, e, p), g = "";
+    b = this.encoder.encode(b);
+    if (e = b.length) {
+      const l = C(), m = C(), r = this.depth, t = this.resolution;
+      for (let q = 0; q < e; q++) {
+        let n = b[this.rtl ? e - 1 - q : q];
+        var d = n.length;
+        if (d && (r || !m[n])) {
+          var f = this.score ? this.score(b, n, q, null, 0) : V(t, e, q), g = "";
           switch(this.tokenize) {
             case "full":
               if (2 < d) {
                 for (f = 0; f < d; f++) {
                   for (var h = d; h > f; h--) {
-                    g = r.substring(f, h);
-                    var k = this.score ? this.score(c, r, p, g, f) : V(t, e, p, d, f);
-                    W(this, m, g, k, a, b);
+                    g = n.substring(f, h);
+                    var k = this.score ? this.score(b, n, q, g, f) : V(t, e, q, d, f);
+                    W(this, m, g, k, a, c);
                   }
                 }
                 break;
@@ -910,24 +962,24 @@ U.prototype.add = function(a, c, b, e) {
             case "reverse":
               if (1 < d) {
                 for (h = d - 1; 0 < h; h--) {
-                  g = r[h] + g, k = this.score ? this.score(c, r, p, g, h) : V(t, e, p, d, h), W(this, m, g, k, a, b);
+                  g = n[h] + g, k = this.score ? this.score(b, n, q, g, h) : V(t, e, q, d, h), W(this, m, g, k, a, c);
                 }
                 g = "";
               }
             case "forward":
               if (1 < d) {
                 for (h = 0; h < d; h++) {
-                  g += r[h], W(this, m, g, f, a, b);
+                  g += n[h], W(this, m, g, f, a, c);
                 }
                 break;
               }
             default:
-              if (W(this, m, r, f, a, b), n && 1 < e && p < e - 1) {
-                for (d = C(), g = this.P, f = r, h = Math.min(n + 1, e - p), d[f] = 1, k = 1; k < h; k++) {
-                  if ((r = c[this.rtl ? e - 1 - p - k : p + k]) && !d[r]) {
-                    d[r] = 1;
-                    const u = this.score ? this.score(c, f, p, r, k) : V(g + (e / 2 > g ? 0 : 1), e, p, h - 1, k - 1), v = this.bidirectional && r > f;
-                    W(this, l, v ? f : r, u, a, b, v ? r : f);
+              if (W(this, m, n, f, a, c), r && 1 < e && q < e - 1) {
+                for (d = C(), g = this.P, f = n, h = Math.min(r + 1, e - q), d[f] = 1, k = 1; k < h; k++) {
+                  if ((n = b[this.rtl ? e - 1 - q - k : q + k]) && !d[n]) {
+                    d[n] = 1;
+                    const u = this.score ? this.score(b, f, q, n, k) : V(g + (e / 2 > g ? 0 : 1), e, q, h - 1, k - 1), v = this.bidirectional && n > f;
+                    W(this, l, v ? f : n, u, a, c, v ? n : f);
                   }
                 }
               }
@@ -939,150 +991,152 @@ U.prototype.add = function(a, c, b, e) {
   }
   return this;
 };
-function W(a, c, b, e, d, f, g) {
+function W(a, b, c, e, d, f, g) {
   let h = g ? a.ctx : a.map, k;
-  if (!c[b] || g && !(k = c[b])[g]) {
-    g ? (c = k || (c[b] = C()), c[g] = 1, (k = h.get(g)) ? h = k : h.set(g, h = new Map())) : c[b] = 1, (k = h.get(b)) ? h = k : h.set(b, h = []), h = h[e] || (h[e] = []), f && h.includes(d) || (h.push(d), a.fastupdate && ((c = a.reg.get(d)) ? c.push(h) : a.reg.set(d, [h])));
+  if (!b[c] || g && !(k = b[c])[g]) {
+    g ? (b = k || (b[c] = C()), b[g] = 1, (k = h.get(g)) ? h = k : h.set(g, h = new Map())) : b[c] = 1, (k = h.get(c)) ? h = k : h.set(c, h = []), h = h[e] || (h[e] = []), f && h.includes(d) || (h.push(d), a.fastupdate && ((b = a.reg.get(d)) ? b.push(h) : a.reg.set(d, [h])));
   }
 }
-function V(a, c, b, e, d) {
-  return b && 1 < a ? c + (e || 0) <= a ? b + (d || 0) : (a - 1) / (c + (e || 0)) * (b + (d || 0)) + 1 | 0 : 0;
+function V(a, b, c, e, d) {
+  return c && 1 < a ? b + (e || 0) <= a ? c + (d || 0) : (a - 1) / (b + (e || 0)) * (c + (d || 0)) + 1 | 0 : 0;
 }
-;function Ea(a, c, b) {
+;function Fa(a, b, c) {
   if (1 === a.length) {
-    return a = a[0], a = b || a.length > c ? c ? a.slice(b, b + c) : a.slice(b) : a;
+    return a = a[0], a = c || a.length > b ? b ? a.slice(c, c + b) : a.slice(c) : a;
   }
   let e = [];
   for (let d = 0, f, g; d < a.length; d++) {
     if ((f = a[d]) && (g = f.length)) {
-      if (b) {
-        if (b >= g) {
-          b -= g;
+      if (c) {
+        if (c >= g) {
+          c -= g;
           continue;
         }
-        b < g && (f = c ? f.slice(b, b + c) : f.slice(b), g = f.length, b = 0);
+        c < g && (f = b ? f.slice(c, c + b) : f.slice(c), g = f.length, c = 0);
       }
       if (e.length) {
-        g > c && (f = f.slice(0, c), g = f.length), e.push(f);
+        g > b && (f = f.slice(0, b), g = f.length), e.push(f);
       } else {
-        if (g >= c) {
-          return g > c && (f = f.slice(0, c)), f;
+        if (g >= b) {
+          return g > b && (f = f.slice(0, b)), f;
         }
         e = [f];
       }
-      c -= g;
-      if (!c) {
+      b -= g;
+      if (!b) {
         break;
       }
     }
   }
   return e.length ? e = 1 < e.length ? [].concat.apply([], e) : e[0] : e;
 }
-;U.prototype.search = function(a, c, b) {
-  b || (!c && H(a) ? (b = a, a = "") : H(c) && (b = c, c = 0));
+;U.prototype.search = function(a, b, c) {
+  c || (!b && H(a) ? (c = a, a = "") : H(b) && (c = b, b = 0));
   var e = [], d = 0;
-  if (b) {
-    a = b.query || a;
-    c = b.limit || c;
-    d = b.offset || 0;
-    var f = b.context;
-    var g = b.suggest;
+  if (c) {
+    a = c.query || a;
+    b = c.limit || b;
+    d = c.offset || 0;
+    var f = c.context;
+    var g = c.suggest;
+    var h = !0;
+    var k = c.resolution;
+  } else {
+    h = !0;
   }
-  a = this.encoder.encode(a);
-  b = a.length;
-  c || (c = 100);
-  if (1 === b) {
-    return X.call(this, a[0], "", c, d);
+  var l = this.encoder.encode(a);
+  c = l.length;
+  b || !h || (b = 100);
+  if (1 === c) {
+    return X.call(this, l[0], "", b, d);
   }
   f = this.depth && !1 !== f;
-  if (2 === b && f && !g) {
-    return X.call(this, a[0], a[1], c, d);
+  if (2 === c && f && !g) {
+    return X.call(this, l[0], l[1], b, d);
   }
-  var h = 0, k = 0;
-  if (1 < b) {
-    var l = C();
-    const n = [];
-    for (let t = 0, p; t < b; t++) {
-      if ((p = a[t]) && !l[p]) {
-        if (g || Y(this, p)) {
-          n.push(p), l[p] = 1;
+  let m = h = 0;
+  if (1 < c) {
+    const t = C(), q = [];
+    for (let n = 0, u; n < c; n++) {
+      if ((u = l[n]) && !t[u]) {
+        if (g || Y(this, u)) {
+          q.push(u), t[u] = 1;
         } else {
           return e;
         }
-        const r = p.length;
-        h = Math.max(h, r);
-        k = k ? Math.min(k, r) : r;
+        const v = u.length;
+        h = Math.max(h, v);
+        m = m ? Math.min(m, v) : v;
       }
     }
-    a = n;
-    b = a.length;
+    l = q;
+    c = a.length;
   }
-  if (!b) {
+  if (!c) {
     return e;
   }
-  l = 0;
-  if (1 === b) {
-    return X.call(this, a[0], "", c, d);
+  a = 0;
+  if (1 === c) {
+    return X.call(this, l[0], "", b, d);
   }
-  if (2 === b && f && !g) {
-    return X.call(this, a[0], a[1], c, d);
+  if (2 === c && f && !g) {
+    return X.call(this, l[0], l[1], b, d);
   }
-  if (1 < b) {
+  if (1 < c) {
     if (f) {
-      var m = a[0];
-      l = 1;
+      var r = l[0];
+      a = 1;
     } else {
-      9 < h && 3 < h / k && a.sort(aa);
+      9 < h && 3 < h / m && l.sort(aa);
     }
   }
-  for (let n, t; l < b; l++) {
-    t = a[l];
-    m ? (n = Y(this, t, m), n = Fa(n, e, g, this.P), g && !1 === n && e.length || (m = t)) : (n = Y(this, t, ""), n = Fa(n, e, g, this.resolution));
-    if (n) {
-      return n;
+  k || 0 === k || (k = this.resolution);
+  for (let t, q; a < c; a++) {
+    q = l[a];
+    r ? (t = Y(this, q, r), t = Ga(t, e, g, this.P), g && !1 === t && e.length || (r = q)) : (t = Y(this, q, ""), t = Ga(t, e, g, k));
+    if (t) {
+      return t;
     }
-    if (g && l === b - 1) {
+    if (g && a === c - 1) {
       f = e.length;
       if (!f) {
-        if (m) {
-          m = "";
-          l = -1;
+        if (r) {
+          r = "";
+          a = -1;
           continue;
         }
         return e;
       }
       if (1 === f) {
-        return Ea(e[0], c, d);
+        return Fa(e[0], b, d);
       }
     }
   }
   a: {
-    a = e;
-    e = this.resolution;
-    m = g;
-    b = a.length;
+    r = g;
+    c = e.length;
     g = [];
     f = C();
-    for (let n = 0, t, p, r, u; n < e; n++) {
-      for (k = 0; k < b; k++) {
-        if (r = a[k], n < r.length && (t = r[n])) {
-          for (l = 0; l < t.length; l++) {
-            p = t[l], (h = f[p]) ? f[p]++ : (h = 0, f[p] = 1), u = g[h] || (g[h] = []), u.push(p);
+    for (let t = 0, q, n, u, v; t < k; t++) {
+      for (a = 0; a < c; a++) {
+        if (u = e[a], t < u.length && (q = u[t])) {
+          for (h = 0; h < q.length; h++) {
+            n = q[h], (l = f[n]) ? f[n]++ : (l = 0, f[n] = 1), v = g[l] || (g[l] = []), v.push(n);
           }
         }
       }
     }
-    if (a = g.length) {
-      if (m) {
+    if (k = g.length) {
+      if (r) {
         if (1 < g.length) {
           b: {
-            for (a = [], e = C(), m = g.length, h = m - 1; 0 <= h; h--) {
-              for (m = g[h], f = m.length, k = 0; k < f; k++) {
-                if (b = m[k], !e[b]) {
-                  if (e[b] = 1, d) {
+            for (k = [], e = C(), r = g.length, l = r - 1; 0 <= l; l--) {
+              for (r = g[l], f = r.length, a = 0; a < f; a++) {
+                if (c = r[a], !e[c]) {
+                  if (e[c] = 1, d) {
                     d--;
                   } else {
-                    if (a.push(b), a.length === c) {
+                    if (k.push(c), k.length === b) {
                       break b;
                     }
                   }
@@ -1091,18 +1145,18 @@ function V(a, c, b, e, d) {
             }
           }
         } else {
-          a = (g = g[0]).length > c || d ? g.slice(d, c + d) : g;
+          k = (g = g[0]).length > b || d ? g.slice(d, b + d) : g;
         }
-        g = a;
+        g = k;
       } else {
-        if (a < b) {
+        if (k < c) {
           e = [];
           break a;
         }
-        g = g[a - 1];
-        if (c || d) {
-          if (g.length > c || d) {
-            g = g.slice(d, c + d);
+        g = g[k - 1];
+        if (b || d) {
+          if (g.length > b || d) {
+            g = g.slice(d, b + d);
           }
         }
       }
@@ -1111,10 +1165,10 @@ function V(a, c, b, e, d) {
   }
   return e;
 };
-function X(a, c, b, e) {
-  return (a = Y(this, a, c)) && a.length ? Ea(a, b, e) : [];
+function X(a, b, c, e) {
+  return (a = Y(this, a, b)) && a.length ? Fa(a, c, e) : [];
 }
-function Fa(a, c, b, e) {
+function Ga(a, b, c, e) {
   let d = [];
   if (a) {
     e = Math.min(a.length, e);
@@ -1122,131 +1176,130 @@ function Fa(a, c, b, e) {
       (g = a[f]) && g && (d[f] = g);
     }
     if (d.length) {
-      c.push(d);
+      b.push(d);
       return;
     }
   }
-  return !b && d;
+  return !c && d;
 }
-function Y(a, c, b) {
+function Y(a, b, c) {
   let e;
-  b && (e = a.bidirectional && c > b);
-  a = b ? (a = a.ctx.get(e ? c : b)) && a.get(e ? b : c) : a.map.get(c);
+  c && (e = a.bidirectional && b > c);
+  a = c ? (a = a.ctx.get(e ? b : c)) && a.get(e ? c : b) : a.map.get(b);
   return a;
 }
-;U.prototype.remove = function(a, c) {
-  const b = this.reg.size && (this.fastupdate ? this.reg.get(a) : this.reg.has(a));
-  if (b) {
+;U.prototype.remove = function(a, b) {
+  const c = this.reg.size && (this.fastupdate ? this.reg.get(a) : this.reg.has(a));
+  if (c) {
     if (this.fastupdate) {
-      for (let e = 0, d; e < b.length; e++) {
-        if (d = b[e]) {
+      for (let e = 0, d; e < c.length; e++) {
+        if (d = c[e]) {
           if (2 > d.length) {
             d.pop();
           } else {
             const f = d.indexOf(a);
-            f === b.length - 1 ? d.pop() : d.splice(f, 1);
+            f === c.length - 1 ? d.pop() : d.splice(f, 1);
           }
         }
       }
     } else {
-      Ga(this.map, a), this.depth && Ga(this.ctx, a);
+      Ha(this.map, a), this.depth && Ha(this.ctx, a);
     }
-    c || this.reg.delete(a);
+    b || this.reg.delete(a);
   }
   this.cache && this.cache.remove(a);
   return this;
 };
-function Ga(a, c) {
-  let b = 0;
+function Ha(a, b) {
+  let c = 0;
   if (a.constructor === Array) {
     for (let e = 0, d, f; e < a.length; e++) {
       if ((d = a[e]) && d.length) {
-        if (f = d.indexOf(c), 0 <= f) {
-          1 < d.length ? (d.splice(f, 1), b++) : delete a[e];
+        if (f = d.indexOf(b), 0 <= f) {
+          1 < d.length ? (d.splice(f, 1), c++) : delete a[e];
           break;
         } else {
-          b++;
+          c++;
         }
       }
     }
   } else {
     for (let e of a) {
-      const d = e[0], f = Ga(e[1], c);
-      f ? b += f : a.delete(d);
+      const d = e[0], f = Ha(e[1], b);
+      f ? c += f : a.delete(d);
     }
   }
-  return b;
+  return c;
 }
-;function U(a, c) {
+;function U(a, b) {
   if (!this || this.constructor !== U) {
     return new U(a);
   }
   if (a) {
-    var b = E(a) ? a : a.preset;
-    b && (Da[b] || console.warn("Preset not found: " + b), a = Object.assign({}, Da[b], a));
+    var c = E(a) ? a : a.preset;
+    c && (Ea[c] || console.warn("Preset not found: " + c), a = Object.assign({}, Ea[c], a));
   } else {
     a = {};
   }
-  b = a.context || {};
-  const e = E(a.encoder) ? Ca[a.encoder] : a.encode || a.encoder || ua;
-  this.encoder = e.encode ? e : "object" === typeof e ? new K(e) : {encode:e};
-  let d;
+  c = a.context;
+  const e = !0 === c ? {depth:1} : c || {}, d = E(a.encoder) ? Da[a.encoder] : a.encode || a.encoder || va;
+  this.encoder = d.encode ? d : "object" === typeof d ? new L(d) : {encode:d};
   this.resolution = a.resolution || 9;
-  this.tokenize = d = a.tokenize || "strict";
-  this.depth = "strict" === d && b.depth || 0;
-  this.bidirectional = !1 !== b.bidirectional;
+  this.tokenize = c = a.tokenize || "strict";
+  this.depth = "strict" === c && e.depth || 0;
+  this.bidirectional = !1 !== e.bidirectional;
   this.fastupdate = !!a.fastupdate;
   this.score = a.score || null;
-  d = !1;
+  c = !1;
   this.map = new Map();
   this.ctx = new Map();
-  this.reg = c || (this.fastupdate ? new Map() : new Set());
-  this.P = b.resolution || 1;
-  this.rtl = e.rtl || a.rtl || !1;
-  this.cache = (d = a.cache || null) && new T(d);
+  this.reg = b || (this.fastupdate ? new Map() : new Set());
+  this.P = e.resolution || 3;
+  this.rtl = d.rtl || a.rtl || !1;
+  this.cache = (c = a.cache || null) && new T(c);
 }
-x = U.prototype;
-x.clear = function() {
+w = U.prototype;
+w.clear = function() {
   this.map.clear();
   this.ctx.clear();
   this.reg.clear();
   this.cache && this.cache.clear();
   return this;
 };
-x.append = function(a, c) {
-  return this.add(a, c, !0);
+w.append = function(a, b) {
+  return this.add(a, b, !0);
 };
-x.contain = function(a) {
+w.contain = function(a) {
   return this.reg.has(a);
 };
-x.update = function(a, c) {
-  const b = this, e = this.remove(a);
-  return e && e.then ? e.then(() => b.add(a, c)) : this.add(a, c);
+w.update = function(a, b) {
+  const c = this, e = this.remove(a);
+  return e && e.then ? e.then(() => c.add(a, b)) : this.add(a, b);
 };
-function Ha(a) {
-  let c = 0;
+function Ia(a) {
+  let b = 0;
   if (a.constructor === Array) {
-    for (let b = 0, e; b < a.length; b++) {
-      (e = a[b]) && (c += e.length);
+    for (let c = 0, e; c < a.length; c++) {
+      (e = a[c]) && (b += e.length);
     }
   } else {
-    for (const b of a) {
-      const e = b[0], d = Ha(b[1]);
-      d ? c += d : a.delete(e);
+    for (const c of a) {
+      const e = c[0], d = Ia(c[1]);
+      d ? b += d : a.delete(e);
     }
   }
-  return c;
+  return b;
 }
-x.cleanup = function() {
+w.cleanup = function() {
   if (!this.fastupdate) {
     return console.info('Cleanup the index isn\'t required when not using "fastupdate".'), this;
   }
-  Ha(this.map);
-  this.depth && Ha(this.ctx);
+  Ia(this.map);
+  this.depth && Ia(this.ctx);
   return this;
 };
-x.searchCache = ta;
-x.export = function(a, c, b, e = 0) {
+w.searchCache = ua;
+w.export = function(a, b, c, e = 0) {
   let d, f;
   switch(e) {
     case 0:
@@ -1259,7 +1312,7 @@ x.export = function(a, c, b, e = 0) {
       break;
     case 2:
       d = "map";
-      f = N(this.map, this.reg.size);
+      f = O(this.map, this.reg.size);
       break;
     case 3:
       d = "ctx";
@@ -1268,40 +1321,40 @@ x.export = function(a, c, b, e = 0) {
     default:
       return;
   }
-  return P.call(this, a, c, d, f, b, e);
+  return Q.call(this, a, b, d, f, c, e);
 };
-x.import = function(a, c) {
-  if (c) {
-    switch(E(c) && (c = JSON.parse(c)), a = a.split("."), "json" === a[a.length - 1] && a.pop(), a = 1 < a.length ? a[1] : a[0], a) {
+w.import = function(a, b) {
+  if (b) {
+    switch(E(b) && (b = JSON.parse(b)), a = a.split("."), "json" === a[a.length - 1] && a.pop(), a = 1 < a.length ? a[1] : a[0], a) {
       case "reg":
         this.fastupdate = !1;
-        this.reg = ma(c, this.reg);
+        this.reg = ma(b, this.reg);
         break;
       case "map":
-        this.map = O(c, this.map);
+        this.map = P(b, this.map);
         break;
       case "ctx":
-        this.ctx = ka(c, this.ctx);
+        this.ctx = ka(b, this.ctx);
     }
   }
 };
-x.serialize = function(a = !0) {
+w.serialize = function(a = !0) {
   if (!this.reg.size) {
     return "";
   }
-  let c = "", b = "";
+  let b = "", c = "";
   for (var e of this.reg.keys()) {
-    b || (b = typeof e), c += (c ? "," : "") + ("string" === b ? '"' + e + '"' : e);
+    c || (c = typeof e), b += (b ? "," : "") + ("string" === c ? '"' + e + '"' : e);
   }
-  c = "index.reg=new Set([" + c + "]);";
+  b = "index.reg=new Set([" + b + "]);";
   e = "";
   for (var d of this.map.entries()) {
     var f = d[0], g = d[1], h = "";
-    for (let m = 0, n; m < g.length; m++) {
-      n = g[m] || [""];
+    for (let m = 0, r; m < g.length; m++) {
+      r = g[m] || [""];
       var k = "";
-      for (var l = 0; l < n.length; l++) {
-        k += (k ? "," : "") + ("string" === b ? '"' + n[l] + '"' : n[l]);
+      for (var l = 0; l < r.length; l++) {
+        k += (k ? "," : "") + ("string" === c ? '"' + r[l] + '"' : r[l]);
       }
       k = "[" + k + "]";
       h += (h ? "," : "") + k;
@@ -1314,15 +1367,15 @@ x.serialize = function(a = !0) {
   for (const m of this.ctx.entries()) {
     f = m[0];
     g = m[1];
-    for (const n of g.entries()) {
-      g = n[0];
-      h = n[1];
+    for (const r of g.entries()) {
+      g = r[0];
+      h = r[1];
       k = "";
-      for (let t = 0, p; t < h.length; t++) {
-        p = h[t] || [""];
+      for (let t = 0, q; t < h.length; t++) {
+        q = h[t] || [""];
         l = "";
-        for (let r = 0; r < p.length; r++) {
-          l += (l ? "," : "") + ("string" === b ? '"' + p[r] + '"' : p[r]);
+        for (let n = 0; n < q.length; n++) {
+          l += (l ? "," : "") + ("string" === c ? '"' + q[n] + '"' : q[n]);
         }
         l = "[" + l + "]";
         k += (k ? "," : "") + l;
@@ -1333,12 +1386,12 @@ x.serialize = function(a = !0) {
     }
   }
   d = "index.ctx=new Map([" + d + "]);";
-  return a ? "function inject(index){" + c + e + d + "}" : c + e + d;
+  return a ? "function inject(index){" + b + e + d + "}" : b + e + d;
 };
 ia(U.prototype);
-const Ia = {Index:U, Charset:Ca, Encoder:K, Document:Q, Worker:null, Resolver:null, IndexedDB:null, Language:{}}, Z = self;
-let Ja;
-(Ja = Z.define) && Ja.amd ? Ja([], function() {
-  return Ia;
-}) : "object" === typeof Z.exports ? Z.exports = Ia : Z.FlexSearch = Ia;
+const Ja = {Index:U, Charset:Da, Encoder:L, Document:R, Worker:null, Resolver:null, IndexedDB:null, Language:{}}, Z = self;
+let Ka;
+(Ka = Z.define) && Ka.amd ? Ka([], function() {
+  return Ja;
+}) : "object" === typeof Z.exports ? Z.exports = Ja : Z.FlexSearch = Ja;
 }(this||self));
diff --git a/dist/flexsearch.compact.min.js b/dist/flexsearch.compact.min.js
index c5edb36..50c4f4a 100644
--- a/dist/flexsearch.compact.min.js
+++ b/dist/flexsearch.compact.min.js
@@ -5,50 +5,53 @@
  * Hosted by Nextapps GmbH
  * https://github.com/nextapps-de/flexsearch
  */
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+T.prototype.get=function(a){const b=this.cache.get(a);b&&this.h!==a&&(this.cache.delete(a),this.cache.set(this.h=a,b));return b};T.prototype.remove=function(a){for(const b of this.cache){const c=b[0];b[1].includes(a)&&this.cache.delete(c)}};T.prototype.clear=function(){this.cache.clear();this.h=""};const va={normalize:function(a){return a.toLowerCase()},dedupe:!1};const wa=new Map([["b","p"],["v","f"],["w","f"],["z","s"],["x","s"],["d","t"],["n","m"],["c","k"],["g","k"],["j","k"],["q","k"],["i","e"],["y","e"],["u","o"]]);const xa=new Map([["ae","a"],["oe","o"],["sh","s"],["kh","k"],["th","t"],["pf","f"]]),ya=[/([^aeo])h(.)/g,"$1$2",/([aeo])h([^aeo]|$)/g,"$1$2",/([^0-9])\1+/g,"$1"];const za={a:"",e:"",i:"",o:"",u:"",y:"",b:1,f:1,p:1,v:1,c:2,g:2,j:2,k:2,q:2,s:2,x:2,z:2,"\u00df":2,d:3,t:3,l:4,m:5,n:5,r:6};const Aa=/[\x00-\x7F]+/g;const Ba=/[\x00-\x7F]+/g;const Ca=/[\x00-\x7F]+/g;var Da={LatinExact:{normalize:!1,dedupe:!1},LatinDefault:va,LatinSimple:{normalize:!0,dedupe:!0},LatinBalance:{normalize:!0,dedupe:!0,mapper:wa},LatinAdvanced:{normalize:!0,dedupe:!0,mapper:wa,matcher:xa,replacer:ya},LatinExtra:{normalize:!0,dedupe:!0,mapper:wa,replacer:ya.concat([/(?!^)[aeo]/g,""]),matcher:xa},LatinSoundex:{normalize:!0,dedupe:!1,include:{letter:!0},finalize:function(a){for(let c=0;c<a.length;c++){var b=a[c];let e=b.charAt(0),d=za[e];for(let g=1,f;g<b.length&&(f=b.charAt(g),"h"===
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+d){for(h=d-1;0<h;h--)f=n[h]+f,k=this.score?this.score(b,n,p,f,h):V(t,e,p,d,h),W(this,m,f,k,a,c);f=""}case "forward":if(1<d){for(h=0;h<d;h++)f+=n[h],W(this,m,f,g,a,c);break}default:if(W(this,m,n,g,a,c),r&&1<e&&p<e-1)for(d=D(),f=this.P,g=n,h=Math.min(r+1,e-p),d[g]=1,k=1;k<h;k++)if((n=b[this.rtl?e-1-p-k:p+k])&&!d[n]){d[n]=1;const u=this.score?this.score(b,g,p,n,k):V(f+(e/2>f?0:1),e,p,h-1,k-1),v=this.bidirectional&&n>g;W(this,l,v?g:n,u,a,c,v?n:g)}}}}this.fastupdate||this.reg.add(a)}}return this};
+function W(a,b,c,e,d,g,f){let h=f?a.ctx:a.map,k;if(!b[c]||f&&!(k=b[c])[f])f?(b=k||(b[c]=D()),b[f]=1,(k=h.get(f))?h=k:h.set(f,h=new Map)):b[c]=1,(k=h.get(c))?h=k:h.set(c,h=[]),h=h[e]||(h[e]=[]),g&&h.includes(d)||(h.push(d),a.fastupdate&&((b=a.reg.get(d))?b.push(h):a.reg.set(d,[h])))}function V(a,b,c,e,d){return c&&1<a?b+(e||0)<=a?c+(d||0):(a-1)/(b+(e||0))*(c+(d||0))+1|0:0};function Fa(a,b,c){if(1===a.length)return a=a[0],a=c||a.length>b?b?a.slice(c,c+b):a.slice(c):a;let e=[];for(let d=0,g,f;d<a.length;d++)if((g=a[d])&&(f=g.length)){if(c){if(c>=f){c-=f;continue}c<f&&(g=b?g.slice(c,c+b):g.slice(c),f=g.length,c=0)}if(e.length)f>b&&(g=g.slice(0,b),f=g.length),e.push(g);else{if(f>=b)return f>b&&(g=g.slice(0,b)),g;e=[g]}b-=f;if(!b)break}return e.length?e=1<e.length?[].concat.apply([],e):e[0]:e};U.prototype.search=function(a,b,c){c||(!b&&G(a)?(c=a,a=""):G(b)&&(c=b,b=0));var e=[],d=0;if(c){a=c.query||a;b=c.limit||b;d=c.offset||0;var g=c.context;var f=c.suggest;var h=!0;var k=c.resolution}else h=!0;var l=this.encoder.encode(a);c=l.length;b||!h||(b=100);if(1===c)return X.call(this,l[0],"",b,d);g=this.depth&&!1!==g;if(2===c&&g&&!f)return X.call(this,l[0],l[1],b,d);let m=h=0;if(1<c){const t=D(),p=[];for(let n=0,u;n<c;n++)if((u=l[n])&&!t[u]){if(f||Y(this,u))p.push(u),t[u]=1;else return e;const v=
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+f=[];g=D();for(let t=0,p,n,u,v;t<k;t++)for(a=0;a<c;a++)if(u=e[a],t<u.length&&(p=u[t]))for(h=0;h<p.length;h++)n=p[h],(l=g[n])?g[n]++:(l=0,g[n]=1),v=f[l]||(f[l]=[]),v.push(n);if(k=f.length)if(r){if(1<f.length)b:for(k=[],e=D(),r=f.length,l=r-1;0<=l;l--)for(r=f[l],g=r.length,a=0;a<g;a++){if(c=r[a],!e[c])if(e[c]=1,d)d--;else if(k.push(c),k.length===b)break b}else k=(f=f[0]).length>b||d?f.slice(d,b+d):f;f=k}else{if(k<c){e=[];break a}f=f[k-1];if(b||d)if(f.length>b||d)f=f.slice(d,b+d)}e=f}return e};
+function X(a,b,c,e){return(a=Y(this,a,b))&&a.length?Fa(a,c,e):[]}function Ga(a,b,c,e){let d=[];if(a){e=Math.min(a.length,e);for(let g=0,f;g<e;g++)(f=a[g])&&f&&(d[g]=f);if(d.length){b.push(d);return}}return!c&&d}function Y(a,b,c){let e;c&&(e=a.bidirectional&&b>c);a=c?(a=a.ctx.get(e?b:c))&&a.get(e?c:b):a.map.get(b);return a};U.prototype.remove=function(a,b){const c=this.reg.size&&(this.fastupdate?this.reg.get(a):this.reg.has(a));if(c){if(this.fastupdate)for(let e=0,d;e<c.length;e++){if(d=c[e])if(2>d.length)d.pop();else{const g=d.indexOf(a);g===c.length-1?d.pop():d.splice(g,1)}}else Ha(this.map,a),this.depth&&Ha(this.ctx,a);b||this.reg.delete(a)}this.cache&&this.cache.remove(a);return this};
+function Ha(a,b){let c=0;if(a.constructor===Array)for(let e=0,d,g;e<a.length;e++){if((d=a[e])&&d.length)if(g=d.indexOf(b),0<=g){1<d.length?(d.splice(g,1),c++):delete a[e];break}else c++}else for(let e of a){const d=e[0],g=Ha(e[1],b);g?c+=g:a.delete(d)}return c};function U(a,b){if(!this||this.constructor!==U)return new U(a);if(a){var c=E(a)?a:a.preset;c&&(a=Object.assign({},Ea[c],a))}else a={};c=a.context;const e=!0===c?{depth:1}:c||{},d=E(a.encoder)?Da[a.encoder]:a.encode||a.encoder||va;this.encoder=d.encode?d:"object"===typeof d?new L(d):{encode:d};this.resolution=a.resolution||9;this.tokenize=c=a.tokenize||"strict";this.depth="strict"===c&&e.depth||0;this.bidirectional=!1!==e.bidirectional;this.fastupdate=!!a.fastupdate;this.score=a.score||null;c=!1;this.map=
+new Map;this.ctx=new Map;this.reg=b||(this.fastupdate?new Map:new Set);this.P=e.resolution||3;this.rtl=d.rtl||a.rtl||!1;this.cache=(c=a.cache||null)&&new T(c)}w=U.prototype;w.clear=function(){this.map.clear();this.ctx.clear();this.reg.clear();this.cache&&this.cache.clear();return this};w.append=function(a,b){return this.add(a,b,!0)};w.contain=function(a){return this.reg.has(a)};w.update=function(a,b){const c=this,e=this.remove(a);return e&&e.then?e.then(()=>c.add(a,b)):this.add(a,b)};
+function Ia(a){let b=0;if(a.constructor===Array)for(let c=0,e;c<a.length;c++)(e=a[c])&&(b+=e.length);else for(const c of a){const e=c[0],d=Ia(c[1]);d?b+=d:a.delete(e)}return b}w.cleanup=function(){if(!this.fastupdate)return this;Ia(this.map);this.depth&&Ia(this.ctx);return this};w.searchCache=ua;
+w.export=function(a,b,c,e=0){let d,g;switch(e){case 0:d="reg";g=la(this.reg);break;case 1:d="cfg";g={};break;case 2:d="map";g=O(this.map,this.reg.size);break;case 3:d="ctx";g=ja(this.ctx,this.reg.size);break;default:return}return Q.call(this,a,b,d,g,c,e)};
+w.import=function(a,b){if(b)switch(E(b)&&(b=JSON.parse(b)),a=a.split("."),"json"===a[a.length-1]&&a.pop(),a=1<a.length?a[1]:a[0],a){case "reg":this.fastupdate=!1;this.reg=ma(b,this.reg);break;case "map":this.map=P(b,this.map);break;case "ctx":this.ctx=ka(b,this.ctx)}};
+w.serialize=function(a=!0){if(!this.reg.size)return"";let b="",c="";for(var e of this.reg.keys())c||(c=typeof e),b+=(b?",":"")+("string"===c?'"'+e+'"':e);b="index.reg=new Set(["+b+"]);";e="";for(var d of this.map.entries()){var g=d[0],f=d[1],h="";for(let m=0,r;m<f.length;m++){r=f[m]||[""];var k="";for(var l=0;l<r.length;l++)k+=(k?",":"")+("string"===c?'"'+r[l]+'"':r[l]);k="["+k+"]";h+=(h?",":"")+k}h='["'+g+'",['+h+"]]";e+=(e?",":"")+h}e="index.map=new Map(["+e+"]);";d="";for(const m of this.ctx.entries()){g=
+m[0];f=m[1];for(const r of f.entries()){f=r[0];h=r[1];k="";for(let t=0,p;t<h.length;t++){p=h[t]||[""];l="";for(let n=0;n<p.length;n++)l+=(l?",":"")+("string"===c?'"'+p[n]+'"':p[n]);l="["+l+"]";k+=(k?",":"")+l}k='new Map([["'+f+'",['+k+"]]])";k='["'+g+'",'+k+"]";d+=(d?",":"")+k}}d="index.ctx=new Map(["+d+"]);";return a?"function inject(index){"+b+e+d+"}":b+e+d};ia(U.prototype);const Ja={Index:U,Charset:Da,Encoder:L,Document:R,Worker:null,Resolver:null,IndexedDB:null,Language:{}},Z=self;let Ka;(Ka=Z.define)&&Ka.amd?Ka([],function(){return Ja}):"object"===typeof Z.exports?Z.exports=Ja:Z.FlexSearch=Ja;}(this||self));
diff --git a/dist/flexsearch.compact.module.debug.js b/dist/flexsearch.compact.module.debug.js
index 481c3d5..9e45f7e 100644
--- a/dist/flexsearch.compact.module.debug.js
+++ b/dist/flexsearch.compact.module.debug.js
@@ -5,31 +5,31 @@
  * Hosted by Nextapps GmbH
  * https://github.com/nextapps-de/flexsearch
  */
-var x;
-function B(a, c, b) {
-  const e = typeof b, d = typeof a;
+var w;
+function B(a, b, c) {
+  const e = typeof c, d = typeof a;
   if ("undefined" !== e) {
     if ("undefined" !== d) {
-      if (b) {
+      if (c) {
         if ("function" === d && e === d) {
           return function(h) {
-            return a(b(h));
+            return a(c(h));
           };
         }
-        c = a.constructor;
-        if (c === b.constructor) {
-          if (c === Array) {
-            return b.concat(a);
+        b = a.constructor;
+        if (b === c.constructor) {
+          if (b === Array) {
+            return c.concat(a);
           }
-          if (c === Map) {
-            var f = new Map(b);
+          if (b === Map) {
+            var f = new Map(c);
             for (var g of a) {
               f.set(g[0], g[1]);
             }
             return f;
           }
-          if (c === Set) {
-            g = new Set(b);
+          if (b === Set) {
+            g = new Set(c);
             for (f of a.values()) {
               g.add(f);
             }
@@ -39,15 +39,15 @@ function B(a, c, b) {
       }
       return a;
     }
-    return b;
+    return c;
   }
-  return "undefined" === d ? c : a;
+  return "undefined" === d ? b : a;
 }
 function C() {
   return Object.create(null);
 }
-function aa(a, c) {
-  return c.length - a.length;
+function aa(a, b) {
+  return b.length - a.length;
 }
 function E(a) {
   return "string" === typeof a;
@@ -55,12 +55,12 @@ function E(a) {
 function H(a) {
   return "object" === typeof a;
 }
-function I(a, c) {
-  if (E(c)) {
-    a = a[c];
+function I(a, b) {
+  if (E(b)) {
+    a = a[b];
   } else {
-    for (let b = 0; a && b < c.length; b++) {
-      a = a[c[b]];
+    for (let c = 0; a && c < b.length; c++) {
+      a = a[b[c]];
     }
   }
   return a;
@@ -74,37 +74,38 @@ function I(a, c) {
 "\u03b8"], ["\u03d2", "\u03a5"], ["\u03d3", "\u03a5"], ["\u03d4", "\u03a5"], ["\u03d5", "\u03c6"], ["\u03d6", "\u03c0"], ["\u03f0", "\u03ba"], ["\u03f1", "\u03c1"], ["\u03f2", "\u03c2"], ["\u03f5", "\u03b5"], ["\u0439", "\u0438"], ["\u0450", "\u0435"], ["\u0451", "\u0435"], ["\u0453", "\u0433"], ["\u0457", "\u0456"], ["\u045c", "\u043a"], ["\u045d", "\u0438"], ["\u045e", "\u0443"], ["\u0477", "\u0475"], ["\u04c2", "\u0436"], ["\u04d1", "\u0430"], ["\u04d3", "\u0430"], ["\u04d7", "\u0435"], ["\u04db", 
 "\u04d9"], ["\u04dd", "\u0436"], ["\u04df", "\u0437"], ["\u04e3", "\u0438"], ["\u04e5", "\u0438"], ["\u04e7", "\u043e"], ["\u04eb", "\u04e9"], ["\u04ed", "\u044d"], ["\u04ef", "\u0443"], ["\u04f1", "\u0443"], ["\u04f3", "\u0443"], ["\u04f5", "\u0447"]];
 const ca = /[^\p{L}\p{N}]+/u, da = /(\d{3})/g, ea = /(\D)(\d{3})/g, fa = /(\d{3})(\D)/g, J = "".normalize && /[\u0300-\u036f]/g;
-function K(a) {
-  if (!this || this.constructor !== K) {
-    return new K(...arguments);
+function L(a) {
+  if (!this || this.constructor !== L) {
+    return new L(...arguments);
   }
-  for (let c = 0; c < arguments.length; c++) {
-    this.assign(arguments[c]);
+  for (let b = 0; b < arguments.length; b++) {
+    this.assign(arguments[b]);
   }
 }
-K.prototype.assign = function(a) {
+w = L.prototype;
+w.assign = function(a) {
   this.normalize = B(a.normalize, !0, this.normalize);
-  let c = a.include, b = c || a.exclude || a.split;
-  if ("object" === typeof b) {
-    let e = !c, d = "";
+  let b = a.include, c = b || a.exclude || a.split;
+  if ("object" === typeof c) {
+    let e = !b, d = "";
     a.include || (d += "\\p{Z}");
-    b.letter && (d += "\\p{L}");
-    b.number && (d += "\\p{N}", e = !!c);
-    b.symbol && (d += "\\p{S}");
-    b.punctuation && (d += "\\p{P}");
-    b.control && (d += "\\p{C}");
-    if (b = b.char) {
-      d += "object" === typeof b ? b.join("") : b;
+    c.letter && (d += "\\p{L}");
+    c.number && (d += "\\p{N}", e = !!b);
+    c.symbol && (d += "\\p{S}");
+    c.punctuation && (d += "\\p{P}");
+    c.control && (d += "\\p{C}");
+    if (c = c.char) {
+      d += "object" === typeof c ? c.join("") : c;
     }
     try {
-      this.split = new RegExp("[" + (c ? "^" : "") + d + "]+", "u");
+      this.split = new RegExp("[" + (b ? "^" : "") + d + "]+", "u");
     } catch (f) {
       this.split = /\s+/;
     }
     this.numeric = e;
   } else {
     try {
-      this.split = B(b, ca, this.split);
+      this.split = B(c, ca, this.split);
     } catch (e) {
       this.split = /\s+/;
     }
@@ -115,47 +116,98 @@ K.prototype.assign = function(a) {
   J || (this.mapper = new Map(ba));
   this.rtl = a.rtl || !1;
   this.dedupe = B(a.dedupe, !0, this.dedupe);
-  this.filter = B((b = a.filter) && new Set(b), null, this.filter);
-  this.matcher = B((b = a.matcher) && new Map(b), null, this.matcher);
-  this.mapper = B((b = a.mapper) && new Map(b), null, this.mapper);
-  this.stemmer = B((b = a.stemmer) && new Map(b), null, this.stemmer);
+  this.filter = B((c = a.filter) && new Set(c), null, this.filter);
+  this.matcher = B((c = a.matcher) && new Map(c), null, this.matcher);
+  this.mapper = B((c = a.mapper) && new Map(c), null, this.mapper);
+  this.stemmer = B((c = a.stemmer) && new Map(c), null, this.stemmer);
   this.replacer = B(a.replacer, null, this.replacer);
   this.minlength = B(a.minlength, 1, this.minlength);
   this.maxlength = B(a.maxlength, 0, this.maxlength);
-  if (this.cache = b = B(a.cache, !0, this.cache)) {
-    this.I = null, this.O = "number" === typeof b ? b : 2e5, this.D = new Map(), this.G = new Map(), this.J = this.A = 128;
+  if (this.cache = c = B(a.cache, !0, this.cache)) {
+    this.J = null, this.O = "number" === typeof c ? c : 2e5, this.F = new Map(), this.G = new Map(), this.L = this.K = 128;
   }
-  this.K = "";
+  this.h = "";
   this.M = null;
-  this.L = "";
+  this.D = "";
   this.N = null;
   if (this.matcher) {
     for (const e of this.matcher.keys()) {
-      this.K += (this.K ? "|" : "") + e;
+      this.h += (this.h ? "|" : "") + e;
     }
   }
   if (this.stemmer) {
     for (const e of this.stemmer.keys()) {
-      this.L += (this.L ? "|" : "") + e;
+      this.D += (this.D ? "|" : "") + e;
     }
   }
   return this;
 };
-K.prototype.encode = function(a) {
-  if (this.cache && a.length <= this.A) {
-    if (this.I) {
-      if (this.D.has(a)) {
-        return this.D.get(a);
+w.addMatcher = function(a, b) {
+  if ("object" === typeof a) {
+    return this.addReplacer(a, b);
+  }
+  if (2 > a.length) {
+    return this.addMapper(a, b);
+  }
+  this.matcher || (this.matcher = new Map());
+  this.matcher.set(a, b);
+  this.h += (this.h ? "|" : "") + a;
+  this.M = null;
+  this.cache && M(this);
+  return this;
+};
+w.addStemmer = function(a, b) {
+  this.stemmer || (this.stemmer = new Map());
+  this.stemmer.set(a, b);
+  this.D += (this.D ? "|" : "") + a;
+  this.N = null;
+  this.cache && M(this);
+  return this;
+};
+w.addFilter = function(a) {
+  this.filter || (this.filter = new Set());
+  this.filter.add(a);
+  this.cache && M(this);
+  return this;
+};
+w.addMapper = function(a, b) {
+  if ("object" === typeof a) {
+    return this.addReplacer(a, b);
+  }
+  if (1 < a.length) {
+    return this.addMatcher(a, b);
+  }
+  this.mapper || (this.mapper = new Map());
+  this.mapper.set(a, b);
+  this.cache && M(this);
+  return this;
+};
+w.addReplacer = function(a, b) {
+  "string" === typeof a && (a = new RegExp(a, "g"));
+  this.replacer || (this.replacer = []);
+  this.replacer.push(a, b || "");
+  this.cache && M(this);
+  return this;
+};
+function M(a) {
+  a.F.clear();
+  a.G.clear();
+}
+w.encode = function(a) {
+  if (this.cache && a.length <= this.K) {
+    if (this.J) {
+      if (this.F.has(a)) {
+        return this.F.get(a);
       }
     } else {
-      this.I = setTimeout(ha, 50, this);
+      this.J = setTimeout(ha, 50, this);
     }
   }
   this.normalize && (a = "function" === typeof this.normalize ? this.normalize(a) : J ? a.normalize("NFKD").replace(J, "").toLowerCase() : a.toLowerCase());
   this.prepare && (a = this.prepare(a));
   this.numeric && 3 < a.length && (a = a.replace(ea, "$1 $2").replace(fa, "$1 $2").replace(da, "$1 "));
-  const c = !(this.dedupe || this.mapper || this.filter || this.matcher || this.stemmer || this.replacer);
-  let b = [], e = this.split || "" === this.split ? a.split(this.split) : a;
+  const b = !(this.dedupe || this.mapper || this.filter || this.matcher || this.stemmer || this.replacer);
+  let c = [], e = this.split || "" === this.split ? a.split(this.split) : a;
   for (let f = 0, g, h; f < e.length; f++) {
     if (!(g = h = e[f])) {
       continue;
@@ -163,146 +215,146 @@ K.prototype.encode = function(a) {
     if (g.length < this.minlength) {
       continue;
     }
-    if (c) {
-      b.push(g);
+    if (b) {
+      c.push(g);
       continue;
     }
     if (this.filter && this.filter.has(g)) {
       continue;
     }
-    if (this.cache && g.length <= this.J) {
-      if (this.I) {
+    if (this.cache && g.length <= this.L) {
+      if (this.J) {
         var d = this.G.get(g);
         if (d || "" === d) {
-          d && b.push(d);
+          d && c.push(d);
           continue;
         }
       } else {
-        this.I = setTimeout(ha, 50, this);
+        this.J = setTimeout(ha, 50, this);
       }
     }
     let k;
-    this.stemmer && 2 < g.length && (this.N || (this.N = new RegExp("(?!^)(" + this.L + ")$")), g = g.replace(this.N, l => this.stemmer.get(l)), k = 1);
+    this.stemmer && 2 < g.length && (this.N || (this.N = new RegExp("(?!^)(" + this.D + ")$")), g = g.replace(this.N, l => this.stemmer.get(l)), k = 1);
     g && k && (g.length < this.minlength || this.filter && this.filter.has(g)) && (g = "");
     if (g && (this.mapper || this.dedupe && 1 < g.length)) {
       d = "";
-      for (let l = 0, m = "", n, t; l < g.length; l++) {
-        n = g.charAt(l), n === m && this.dedupe || ((t = this.mapper && this.mapper.get(n)) || "" === t ? t === m && this.dedupe || !(m = t) || (d += t) : d += m = n);
+      for (let l = 0, m = "", r, t; l < g.length; l++) {
+        r = g.charAt(l), r === m && this.dedupe || ((t = this.mapper && this.mapper.get(r)) || "" === t ? t === m && this.dedupe || !(m = t) || (d += t) : d += m = r);
       }
       g = d;
     }
-    this.matcher && 1 < g.length && (this.M || (this.M = new RegExp("(" + this.K + ")", "g")), g = g.replace(this.M, l => this.matcher.get(l)));
+    this.matcher && 1 < g.length && (this.M || (this.M = new RegExp("(" + this.h + ")", "g")), g = g.replace(this.M, l => this.matcher.get(l)));
     if (g && this.replacer) {
       for (d = 0; g && d < this.replacer.length; d += 2) {
         g = g.replace(this.replacer[d], this.replacer[d + 1]);
       }
     }
-    this.cache && h.length <= this.J && (this.G.set(h, g), this.G.size > this.O && (this.G.clear(), this.J = this.J / 1.1 | 0));
-    g && b.push(g);
+    this.cache && h.length <= this.L && (this.G.set(h, g), this.G.size > this.O && (this.G.clear(), this.L = this.L / 1.1 | 0));
+    g && c.push(g);
   }
-  this.finalize && (b = this.finalize(b) || b);
-  this.cache && a.length <= this.A && (this.D.set(a, b), this.D.size > this.O && (this.D.clear(), this.A = this.A / 1.1 | 0));
-  return b;
+  this.finalize && (c = this.finalize(c) || c);
+  this.cache && a.length <= this.K && (this.F.set(a, c), this.F.size > this.O && (this.F.clear(), this.K = this.K / 1.1 | 0));
+  return c;
 };
 function ha(a) {
-  a.I = null;
-  a.D.clear();
+  a.J = null;
+  a.F.clear();
   a.G.clear();
 }
 ;function ia(a) {
-  M.call(a, "add");
-  M.call(a, "append");
-  M.call(a, "search");
-  M.call(a, "update");
-  M.call(a, "remove");
+  N.call(a, "add");
+  N.call(a, "append");
+  N.call(a, "search");
+  N.call(a, "update");
+  N.call(a, "remove");
 }
-function M(a) {
+function N(a) {
   this[a + "Async"] = function() {
-    var c = arguments;
-    const b = c[c.length - 1];
+    var b = arguments;
+    const c = b[b.length - 1];
     let e;
-    "function" === typeof b && (e = b, delete c[c.length - 1]);
-    c = this[a].apply(this, c);
-    e && (c.then ? c.then(e) : e(c));
-    return c;
+    "function" === typeof c && (e = c, delete b[b.length - 1]);
+    b = this[a].apply(this, b);
+    e && (b.then ? b.then(e) : e(b));
+    return b;
   };
 }
-;function N(a, c = 0) {
-  let b = [], e = [];
-  c && (c = 250000 / c * 5000 | 0);
+;function O(a, b = 0) {
+  let c = [], e = [];
+  b && (b = 250000 / b * 5000 | 0);
   for (const d of a.entries()) {
-    e.push(d), e.length === c && (b.push(e), e = []);
-  }
-  e.length && b.push(e);
-  return b;
-}
-function O(a, c) {
-  c || (c = new Map());
-  for (let b = 0, e; b < a.length; b++) {
-    e = a[b], c.set(e[0], e[1]);
+    e.push(d), e.length === b && (c.push(e), e = []);
   }
+  e.length && c.push(e);
   return c;
 }
-function ja(a, c = 0) {
-  let b = [], e = [];
-  c && (c = 250000 / c * 1000 | 0);
-  for (const d of a.entries()) {
-    e.push([d[0], N(d[1])[0]]), e.length === c && (b.push(e), e = []);
+function P(a, b) {
+  b || (b = new Map());
+  for (let c = 0, e; c < a.length; c++) {
+    e = a[c], b.set(e[0], e[1]);
   }
-  e.length && b.push(e);
   return b;
 }
-function ka(a, c) {
-  c || (c = new Map());
-  for (let b = 0, e, d; b < a.length; b++) {
-    e = a[b], d = c.get(e[0]), c.set(e[0], O(e[1], d));
+function ja(a, b = 0) {
+  let c = [], e = [];
+  b && (b = 250000 / b * 1000 | 0);
+  for (const d of a.entries()) {
+    e.push([d[0], O(d[1])[0]]), e.length === b && (c.push(e), e = []);
   }
+  e.length && c.push(e);
   return c;
 }
+function ka(a, b) {
+  b || (b = new Map());
+  for (let c = 0, e, d; c < a.length; c++) {
+    e = a[c], d = b.get(e[0]), b.set(e[0], P(e[1], d));
+  }
+  return b;
+}
 function la(a) {
-  let c = [], b = [];
+  let b = [], c = [];
   for (const e of a.keys()) {
-    b.push(e), 250000 === b.length && (c.push(b), b = []);
+    c.push(e), 250000 === c.length && (b.push(c), c = []);
   }
-  b.length && c.push(b);
-  return c;
+  c.length && b.push(c);
+  return b;
 }
-function ma(a, c) {
-  c || (c = new Set());
-  for (let b = 0; b < a.length; b++) {
-    c.add(a[b]);
+function ma(a, b) {
+  b || (b = new Set());
+  for (let c = 0; c < a.length; c++) {
+    b.add(a[c]);
   }
-  return c;
+  return b;
 }
-function P(a, c, b, e, d, f, g = 0) {
+function Q(a, b, c, e, d, f, g = 0) {
   const h = e && e.constructor === Array;
   var k = h ? e.shift() : e;
   if (!k) {
-    return this.export(a, c, d, f + 1);
+    return this.export(a, b, d, f + 1);
   }
-  if ((k = a((c ? c + "." : "") + (g + 1) + "." + b, JSON.stringify(k))) && k.then) {
+  if ((k = a((b ? b + "." : "") + (g + 1) + "." + c, JSON.stringify(k))) && k.then) {
     const l = this;
     return k.then(function() {
-      return P.call(l, a, c, b, h ? e : null, d, f, g + 1);
+      return Q.call(l, a, b, c, h ? e : null, d, f, g + 1);
     });
   }
-  return P.call(this, a, c, b, h ? e : null, d, f, g + 1);
+  return Q.call(this, a, b, c, h ? e : null, d, f, g + 1);
 }
-;Q.prototype.add = function(a, c, b) {
-  H(a) && (c = a, a = I(c, this.key));
-  if (c && (a || 0 === a)) {
-    if (!b && this.reg.has(a)) {
-      return this.update(a, c);
+;R.prototype.add = function(a, b, c) {
+  H(a) && (b = a, a = I(b, this.key));
+  if (b && (a || 0 === a)) {
+    if (!c && this.reg.has(a)) {
+      return this.update(a, b);
     }
     for (let h = 0, k; h < this.field.length; h++) {
       k = this.C[h];
       var e = this.index.get(this.field[h]);
       if ("function" === typeof k) {
-        var d = k(c);
+        var d = k(b);
         d && e.add(a, d, !1, !0);
       } else {
-        if (d = k.F, !d || d(c)) {
-          k.constructor === String ? k = ["" + k] : E(k) && (k = [k]), R(c, k, this.H, 0, e, a, k[0], b);
+        if (d = k.H, !d || d(b)) {
+          k.constructor === String ? k = ["" + k] : E(k) && (k = [k]), S(b, k, this.I, 0, e, a, k[0], c);
         }
       }
     }
@@ -312,76 +364,76 @@ function P(a, c, b, e, d, f, g = 0) {
         d = this.tag.get(g);
         let h = C();
         if ("function" === typeof f) {
-          if (f = f(c), !f) {
+          if (f = f(b), !f) {
             continue;
           }
         } else {
-          const k = f.F;
-          if (k && !k(c)) {
+          const k = f.H;
+          if (k && !k(b)) {
             continue;
           }
           f.constructor === String && (f = "" + f);
-          f = I(c, f);
+          f = I(b, f);
         }
         if (d && f) {
           E(f) && (f = [f]);
           for (let k = 0, l, m; k < f.length; k++) {
-            l = f[k], h[l] || (h[l] = 1, (g = d.get(l)) ? m = g : d.set(l, m = []), b && m.includes(a) || (m.push(a), this.fastupdate && ((g = this.reg.get(a)) ? g.push(m) : this.reg.set(a, [m]))));
+            l = f[k], h[l] || (h[l] = 1, (g = d.get(l)) ? m = g : d.set(l, m = []), c && m.includes(a) || (m.push(a), this.fastupdate && ((g = this.reg.get(a)) ? g.push(m) : this.reg.set(a, [m]))));
           }
         } else {
           d || console.warn("Tag '" + g + "' was not found");
         }
       }
     }
-    if (this.store && (!b || !this.store.has(a))) {
+    if (this.store && (!c || !this.store.has(a))) {
       let h;
-      if (this.h) {
+      if (this.A) {
         h = C();
-        for (let k = 0, l; k < this.h.length; k++) {
-          l = this.h[k];
-          if ((b = l.F) && !b(c)) {
+        for (let k = 0, l; k < this.A.length; k++) {
+          l = this.A[k];
+          if ((c = l.H) && !c(b)) {
             continue;
           }
           let m;
           if ("function" === typeof l) {
-            m = l(c);
+            m = l(b);
             if (!m) {
               continue;
             }
             l = [l.S];
           } else if (E(l) || l.constructor === String) {
-            h[l] = c[l];
+            h[l] = b[l];
             continue;
           }
-          S(c, h, l, 0, l[0], m);
+          na(b, h, l, 0, l[0], m);
         }
       }
-      this.store.set(a, h || c);
+      this.store.set(a, h || b);
     }
   }
   return this;
 };
-function S(a, c, b, e, d, f) {
+function na(a, b, c, e, d, f) {
   a = a[d];
-  if (e === b.length - 1) {
-    c[d] = f || a;
+  if (e === c.length - 1) {
+    b[d] = f || a;
   } else if (a) {
     if (a.constructor === Array) {
-      for (c = c[d] = Array(a.length), d = 0; d < a.length; d++) {
-        S(a, c, b, e, d);
+      for (b = b[d] = Array(a.length), d = 0; d < a.length; d++) {
+        na(a, b, c, e, d);
       }
     } else {
-      c = c[d] || (c[d] = C()), d = b[++e], S(a, c, b, e, d);
+      b = b[d] || (b[d] = C()), d = c[++e], na(a, b, c, e, d);
     }
   }
 }
-function R(a, c, b, e, d, f, g, h) {
+function S(a, b, c, e, d, f, g, h) {
   if (a = a[g]) {
-    if (e === c.length - 1) {
+    if (e === b.length - 1) {
       if (a.constructor === Array) {
-        if (b[e]) {
-          for (c = 0; c < a.length; c++) {
-            d.add(f, a[c], !0, !0);
+        if (c[e]) {
+          for (b = 0; b < a.length; b++) {
+            d.add(f, a[b], !0, !0);
           }
           return;
         }
@@ -391,66 +443,66 @@ function R(a, c, b, e, d, f, g, h) {
     } else {
       if (a.constructor === Array) {
         for (g = 0; g < a.length; g++) {
-          R(a, c, b, e, d, f, g, h);
+          S(a, b, c, e, d, f, g, h);
         }
       } else {
-        g = c[++e], R(a, c, b, e, d, f, g, h);
+        g = b[++e], S(a, b, c, e, d, f, g, h);
       }
     }
   }
 }
-;function na(a, c) {
-  const b = C(), e = [];
-  for (let d = 0, f; d < c.length; d++) {
-    f = c[d];
+;function oa(a, b) {
+  const c = C(), e = [];
+  for (let d = 0, f; d < b.length; d++) {
+    f = b[d];
     for (let g = 0; g < f.length; g++) {
-      b[f[g]] = 1;
+      c[f[g]] = 1;
     }
   }
   for (let d = 0, f; d < a.length; d++) {
-    f = a[d], 1 === b[f] && (e.push(f), b[f] = 2);
+    f = a[d], 1 === c[f] && (e.push(f), c[f] = 2);
   }
   return e;
 }
-;Q.prototype.search = function(a, c, b, e) {
-  b || (!c && H(a) ? (b = a, a = "") : H(c) && (b = c, c = 0));
+;R.prototype.search = function(a, b, c, e) {
+  c || (!b && H(a) ? (c = a, a = "") : H(b) && (c = b, b = 0));
   let d = [];
   var f = [];
-  let g, h, k, l, m, n, t = 0, p;
-  if (b) {
-    b.constructor === Array && (b = {index:b});
-    a = b.query || a;
-    var r = b.pluck;
-    h = b.merge;
-    l = r || b.field || b.index;
-    m = this.tag && b.tag;
-    g = this.store && b.enrich;
-    k = b.suggest;
-    p = b.highlight;
-    c = b.limit || c;
-    n = b.offset || 0;
-    c || (c = 100);
+  let g, h, k, l, m, r, t = 0, q;
+  if (c) {
+    c.constructor === Array && (c = {index:c});
+    a = c.query || a;
+    var n = c.pluck;
+    h = c.merge;
+    l = n || c.field || c.index;
+    m = this.tag && c.tag;
+    g = this.store && c.enrich;
+    k = c.suggest;
+    q = c.highlight;
+    b = c.limit || b;
+    r = c.offset || 0;
+    b || (b = 100);
     if (m) {
       m.constructor !== Array && (m = [m]);
       var u = [];
-      for (let w = 0, q; w < m.length; w++) {
-        q = m[w];
-        if (E(q)) {
+      for (let x = 0, p; x < m.length; x++) {
+        p = m[x];
+        if (E(p)) {
           throw Error("A tag option can't be a string, instead it needs a { field: tag } format.");
         }
-        if (q.field && q.tag) {
-          var v = q.tag;
+        if (p.field && p.tag) {
+          var v = p.tag;
           if (v.constructor === Array) {
             for (var y = 0; y < v.length; y++) {
-              u.push(q.field, v[y]);
+              u.push(p.field, v[y]);
             }
           } else {
-            u.push(q.field, v);
+            u.push(p.field, v);
           }
         } else {
-          v = Object.keys(q);
+          v = Object.keys(p);
           for (let D = 0, A, z; D < v.length; D++) {
-            if (A = v[D], z = q[A], z.constructor === Array) {
+            if (A = v[D], z = p[A], z.constructor === Array) {
               for (y = 0; y < z.length; y++) {
                 u.push(A, z[y]);
               }
@@ -468,12 +520,12 @@ function R(a, c, b, e, d, f, g, h) {
         e = [];
         if (u.length) {
           for (f = 0; f < u.length; f += 2) {
-            r = oa.call(this, u[f], u[f + 1], c, n, g), d.push({field:u[f], tag:u[f + 1], result:r});
+            n = pa.call(this, u[f], u[f + 1], b, r, g), d.push({field:u[f], tag:u[f + 1], result:n});
           }
         }
-        return e.length ? Promise.all(e).then(function(w) {
-          for (let q = 0; q < w.length; q++) {
-            d[q].result = w[q];
+        return e.length ? Promise.all(e).then(function(x) {
+          for (let p = 0; p < x.length; p++) {
+            d[p].result = x[p];
           }
           return d;
         }) : d;
@@ -483,26 +535,26 @@ function R(a, c, b, e, d, f, g, h) {
   }
   l || (l = this.field);
   u = !e && (this.worker || this.db) && [];
-  for (let w = 0, q, D, A; w < l.length; w++) {
-    D = l[w];
+  for (let x = 0, p, D, A; x < l.length; x++) {
+    D = l[x];
     let z;
-    E(D) || (z = D, D = z.field, a = z.query || a, c = z.limit || c, n = z.offset || n, k = z.suggest || k, g = this.store && (z.enrich || g));
+    E(D) || (z = D, D = z.field, a = z.query || a, b = z.limit || b, r = z.offset || r, k = z.suggest || k, g = this.store && (z.enrich || g));
     if (e) {
-      q = e[w];
+      p = e[x];
     } else {
-      if (v = z || b, y = this.index.get(D), m && (v.enrich = !1), u) {
-        u[w] = y.search(a, c, v);
+      if (v = z || c, y = this.index.get(D), m && (v.enrich = !1), u) {
+        u[x] = y.search(a, b, v);
         v && g && (v.enrich = g);
         continue;
       } else {
-        q = y.search(a, c, v), v && g && (v.enrich = g);
+        p = y.search(a, b, v), v && g && (v.enrich = g);
       }
     }
-    A = q && q.length;
+    A = p && p.length;
     if (m && A) {
       v = [];
       y = 0;
-      for (let G = 0, F, L; G < m.length; G += 2) {
+      for (let G = 0, F, K; G < m.length; G += 2) {
         F = this.tag.get(m[G]);
         if (!F) {
           if (console.warn("Tag '" + m[G] + ":" + m[G + 1] + "' will be skipped because there is no field '" + m[G] + "'."), k) {
@@ -511,15 +563,15 @@ function R(a, c, b, e, d, f, g, h) {
             return d;
           }
         }
-        if (L = (F = F && F.get(m[G + 1])) && F.length) {
+        if (K = (F = F && F.get(m[G + 1])) && F.length) {
           y++, v.push(F);
         } else if (!k) {
           return d;
         }
       }
       if (y) {
-        q = na(q, v);
-        A = q.length;
+        p = oa(p, v);
+        A = p.length;
         if (!A && !k) {
           return d;
         }
@@ -527,52 +579,52 @@ function R(a, c, b, e, d, f, g, h) {
       }
     }
     if (A) {
-      f[t] = D, d.push(q), t++;
+      f[t] = D, d.push(p), t++;
     } else if (1 === l.length) {
       return d;
     }
   }
   if (u) {
-    const w = this;
-    return Promise.all(u).then(function(q) {
-      return q.length ? w.search(a, c, b, q) : q;
+    const x = this;
+    return Promise.all(u).then(function(p) {
+      return p.length ? x.search(a, b, c, p) : p;
     });
   }
   if (!t) {
     return d;
   }
-  if (r && (!g || !this.store)) {
+  if (n && (!g || !this.store)) {
     return d[0];
   }
   u = [];
-  for (let w = 0, q; w < f.length; w++) {
-    q = d[w];
-    g && q.length && !q[0].doc && q.length && (q = pa.call(this, q));
-    if (r) {
-      return q;
+  for (let x = 0, p; x < f.length; x++) {
+    p = d[x];
+    g && p.length && !p[0].doc && p.length && (p = qa.call(this, p));
+    if (n) {
+      return p;
     }
-    d[w] = {field:f[w], result:q};
+    d[x] = {field:f[x], result:p};
   }
-  return h ? qa(d, c) : p ? ra(d, a, this.index, this.field, this.C, p) : d;
+  return h ? ra(d, b) : q ? sa(d, a, this.index, this.field, this.C, q) : d;
 };
-function ra(a, c, b, e, d, f) {
+function sa(a, b, c, e, d, f) {
   let g, h, k;
-  for (let m = 0, n, t, p, r, u; m < a.length; m++) {
-    n = a[m].result;
+  for (let m = 0, r, t, q, n, u; m < a.length; m++) {
+    r = a[m].result;
     t = a[m].field;
-    r = b.get(t);
-    p = r.encoder;
-    k = r.tokenize;
+    n = c.get(t);
+    q = n.encoder;
+    k = n.tokenize;
     u = d[e.indexOf(t)];
-    p !== g && (g = p, h = g.encode(c));
-    for (let v = 0; v < n.length; v++) {
+    q !== g && (g = q, h = g.encode(b));
+    for (let v = 0; v < r.length; v++) {
       let y = "";
-      var l = I(n[v].doc, u);
-      let w = g.encode(l);
+      var l = I(r[v].doc, u);
+      let x = g.encode(l);
       l = l.split(g.split);
-      for (let q = 0, D, A; q < w.length; q++) {
-        D = w[q];
-        A = l[q];
+      for (let p = 0, D, A; p < x.length; p++) {
+        D = x[p];
+        A = l[p];
         let z;
         for (let G = 0, F; G < h.length; G++) {
           if (F = h[G], "strict" === k) {
@@ -582,23 +634,23 @@ function ra(a, c, b, e, d, f) {
               break;
             }
           } else {
-            const L = D.indexOf(F);
-            if (-1 < L) {
-              y += (y ? " " : "") + A.substring(0, L) + f.replace("$1", A.substring(L, F.length)) + A.substring(L + F.length);
+            const K = D.indexOf(F);
+            if (-1 < K) {
+              y += (y ? " " : "") + A.substring(0, K) + f.replace("$1", A.substring(K, F.length)) + A.substring(K + F.length);
               z = !0;
               break;
             }
           }
         }
-        z || (y += (y ? " " : "") + l[q]);
+        z || (y += (y ? " " : "") + l[p]);
       }
-      n[v].highlight = y;
+      r[v].highlight = y;
     }
   }
   return a;
 }
-function qa(a, c) {
-  const b = [], e = C();
+function ra(a, b) {
+  const c = [], e = C();
   for (let d = 0, f, g; d < a.length; d++) {
     f = a[d];
     g = f.result;
@@ -606,112 +658,112 @@ function qa(a, c) {
       if (l = g[h], k = l.id, m = e[k]) {
         m.push(f.field);
       } else {
-        if (b.length === c) {
-          return b;
+        if (c.length === b) {
+          return c;
         }
         l.field = e[k] = [f.field];
-        b.push(l);
+        c.push(l);
       }
     }
   }
-  return b;
+  return c;
 }
-function oa(a, c, b, e, d) {
+function pa(a, b, c, e, d) {
   let f = this.tag.get(a);
   if (!f) {
     return console.warn("Tag '" + a + "' was not found"), [];
   }
-  if ((a = (f = f && f.get(c)) && f.length - e) && 0 < a) {
-    if (a > b || e) {
-      f = f.slice(e, e + b);
+  if ((a = (f = f && f.get(b)) && f.length - e) && 0 < a) {
+    if (a > c || e) {
+      f = f.slice(e, e + c);
     }
-    d && (f = pa.call(this, f));
+    d && (f = qa.call(this, f));
     return f;
   }
 }
-function pa(a) {
-  const c = Array(a.length);
-  for (let b = 0, e; b < a.length; b++) {
-    e = a[b], c[b] = {id:e, doc:this.store.get(e)};
+function qa(a) {
+  const b = Array(a.length);
+  for (let c = 0, e; c < a.length; c++) {
+    e = a[c], b[c] = {id:e, doc:this.store.get(e)};
   }
-  return c;
+  return b;
 }
-;function Q(a) {
-  if (!this || this.constructor !== Q) {
-    return new Q(a);
+;function R(a) {
+  if (!this || this.constructor !== R) {
+    return new R(a);
   }
-  const c = a.document || a.doc || a;
-  var b;
+  const b = a.document || a.doc || a;
+  var c;
   this.C = [];
   this.field = [];
-  this.H = [];
-  this.key = (b = c.key || c.id) && T(b, this.H) || "id";
+  this.I = [];
+  this.key = (c = b.key || b.id) && T(c, this.I) || "id";
   this.reg = (this.fastupdate = !!a.fastupdate) ? new Map() : new Set();
-  this.h = (b = c.store || null) && !0 !== b && [];
-  this.store = b && new Map();
-  this.cache = (b = a.cache || null) && new U(b);
+  this.A = (c = b.store || null) && c && !0 !== c && [];
+  this.store = c && new Map();
+  this.cache = (c = a.cache || null) && new U(c);
   a.cache = !1;
-  b = new Map();
-  let e = c.index || c.field || c;
+  c = new Map();
+  let e = b.index || b.field || b;
   E(e) && (e = [e]);
   for (let d = 0, f, g; d < e.length; d++) {
-    f = e[d], E(f) || (g = f, f = f.field), g = H(g) ? Object.assign({}, a, g) : a, b.set(f, new V(g, this.reg)), g.custom ? this.C[d] = g.custom : (this.C[d] = T(f, this.H), g.filter && ("string" === typeof this.C[d] && (this.C[d] = new String(this.C[d])), this.C[d].F = g.filter)), this.field[d] = f;
+    f = e[d], E(f) || (g = f, f = f.field), g = H(g) ? Object.assign({}, a, g) : a, c.set(f, new V(g, this.reg)), g.custom ? this.C[d] = g.custom : (this.C[d] = T(f, this.I), g.filter && ("string" === typeof this.C[d] && (this.C[d] = new String(this.C[d])), this.C[d].H = g.filter)), this.field[d] = f;
   }
-  if (this.h) {
-    a = c.store;
+  if (this.A) {
+    a = b.store;
     E(a) && (a = [a]);
     for (let d = 0, f, g; d < a.length; d++) {
-      f = a[d], g = f.field || f, f.custom ? (this.h[d] = f.custom, f.custom.S = g) : (this.h[d] = T(g, this.H), f.filter && ("string" === typeof this.h[d] && (this.h[d] = new String(this.h[d])), this.h[d].F = f.filter));
+      f = a[d], g = f.field || f, f.custom ? (this.A[d] = f.custom, f.custom.S = g) : (this.A[d] = T(g, this.I), f.filter && ("string" === typeof this.A[d] && (this.A[d] = new String(this.A[d])), this.A[d].H = f.filter));
     }
   }
-  this.index = b;
+  this.index = c;
   this.tag = null;
-  if (b = c.tag) {
-    if ("string" === typeof b && (b = [b]), b.length) {
+  if (c = b.tag) {
+    if ("string" === typeof c && (c = [c]), c.length) {
       this.tag = new Map();
       this.B = [];
       this.R = [];
-      for (let d = 0, f, g; d < b.length; d++) {
-        f = b[d];
+      for (let d = 0, f, g; d < c.length; d++) {
+        f = c[d];
         g = f.field || f;
         if (!g) {
           throw Error("The tag field from the document descriptor is undefined.");
         }
-        f.custom ? this.B[d] = f.custom : (this.B[d] = T(g, this.H), f.filter && ("string" === typeof this.B[d] && (this.B[d] = new String(this.B[d])), this.B[d].F = f.filter));
+        f.custom ? this.B[d] = f.custom : (this.B[d] = T(g, this.I), f.filter && ("string" === typeof this.B[d] && (this.B[d] = new String(this.B[d])), this.B[d].H = f.filter));
         this.R[d] = g;
         this.tag.set(g, new Map());
       }
     }
   }
 }
-function T(a, c) {
-  const b = a.split(":");
+function T(a, b) {
+  const c = a.split(":");
   let e = 0;
-  for (let d = 0; d < b.length; d++) {
-    a = b[d], "]" === a[a.length - 1] && (a = a.substring(0, a.length - 2)) && (c[e] = !0), a && (b[e++] = a);
+  for (let d = 0; d < c.length; d++) {
+    a = c[d], "]" === a[a.length - 1] && (a = a.substring(0, a.length - 2)) && (b[e] = !0), a && (c[e++] = a);
   }
-  e < b.length && (b.length = e);
-  return 1 < e ? b : b[0];
+  e < c.length && (c.length = e);
+  return 1 < e ? c : c[0];
 }
-x = Q.prototype;
-x.append = function(a, c) {
-  return this.add(a, c, !0);
+w = R.prototype;
+w.append = function(a, b) {
+  return this.add(a, b, !0);
 };
-x.update = function(a, c) {
-  return this.remove(a).add(a, c);
+w.update = function(a, b) {
+  return this.remove(a).add(a, b);
 };
-x.remove = function(a) {
+w.remove = function(a) {
   H(a) && (a = I(a, this.key));
-  for (var c of this.index.values()) {
-    c.remove(a, !0);
+  for (var b of this.index.values()) {
+    b.remove(a, !0);
   }
   if (this.reg.has(a)) {
     if (this.tag && !this.fastupdate) {
-      for (let b of this.tag.values()) {
-        for (let e of b) {
-          c = e[0];
+      for (let c of this.tag.values()) {
+        for (let e of c) {
+          b = e[0];
           const d = e[1], f = d.indexOf(a);
-          -1 < f && (1 < d.length ? d.splice(f, 1) : b.delete(c));
+          -1 < f && (1 < d.length ? d.splice(f, 1) : c.delete(b));
         }
       }
     }
@@ -721,7 +773,7 @@ x.remove = function(a) {
   this.cache && this.cache.remove(a);
   return this;
 };
-x.clear = function() {
+w.clear = function() {
   for (const a of this.index.values()) {
     a.clear();
   }
@@ -733,93 +785,93 @@ x.clear = function() {
   this.store && this.store.clear();
   return this;
 };
-x.contain = function(a) {
+w.contain = function(a) {
   return this.reg.has(a);
 };
-x.cleanup = function() {
+w.cleanup = function() {
   for (const a of this.index.values()) {
     a.cleanup();
   }
   return this;
 };
-x.get = function(a) {
+w.get = function(a) {
   return this.store.get(a);
 };
-x.set = function(a, c) {
-  this.store.set(a, c);
+w.set = function(a, b) {
+  this.store.set(a, b);
   return this;
 };
-x.searchCache = sa;
-x.export = function(a, c, b = 0, e = 0) {
-  if (b < this.field.length) {
-    const g = this.field[b];
-    if ((c = this.index.get(g).export(a, g, b, e = 1)) && c.then) {
+w.searchCache = ta;
+w.export = function(a, b, c = 0, e = 0) {
+  if (c < this.field.length) {
+    const g = this.field[c];
+    if ((b = this.index.get(g).export(a, g, c, e = 1)) && b.then) {
       const h = this;
-      return c.then(function() {
-        return h.export(a, g, b + 1);
+      return b.then(function() {
+        return h.export(a, g, c + 1);
       });
     }
-    return this.export(a, g, b + 1);
+    return this.export(a, g, c + 1);
   }
   let d, f;
   switch(e) {
     case 0:
       d = "reg";
       f = la(this.reg);
-      c = null;
+      b = null;
       break;
     case 1:
       d = "tag";
       f = ja(this.tag, this.reg.size);
-      c = null;
+      b = null;
       break;
     case 2:
       d = "doc";
-      f = N(this.store);
-      c = null;
+      f = O(this.store);
+      b = null;
       break;
     case 3:
       d = "cfg";
       f = {};
-      c = null;
+      b = null;
       break;
     default:
       return;
   }
-  return P.call(this, a, c, d, f, b, e);
+  return Q.call(this, a, b, d, f, c, e);
 };
-x.import = function(a, c) {
-  if (c) {
-    E(c) && (c = JSON.parse(c));
+w.import = function(a, b) {
+  if (b) {
+    E(b) && (b = JSON.parse(b));
     a = a.split(".");
     "json" === a[a.length - 1] && a.pop();
-    var b = 2 < a.length ? a[0] : "";
+    var c = 2 < a.length ? a[0] : "";
     a = 2 < a.length ? a[2] : a[1];
-    if (b) {
-      return this.index.get(b).import(a, c);
+    if (c) {
+      return this.index.get(c).import(a, b);
     }
     switch(a) {
       case "reg":
         this.fastupdate = !1;
-        this.reg = ma(c, this.reg);
+        this.reg = ma(b, this.reg);
         for (let e = 0, d; e < this.field.length; e++) {
           d = this.index.get(this.field[e]), d.fastupdate = !1, d.reg = this.reg;
         }
         break;
       case "tag":
-        this.tag = ka(c, this.tag);
+        this.tag = ka(b, this.tag);
         break;
       case "doc":
-        this.store = O(c, this.store);
+        this.store = P(b, this.store);
     }
   }
 };
-ia(Q.prototype);
-function sa(a, c, b) {
+ia(R.prototype);
+function ta(a, b, c) {
   a = ("object" === typeof a ? "" + a.query : a).toLowerCase();
   let e = this.cache.get(a);
   if (!e) {
-    e = this.search(a, c, b);
+    e = this.search(a, b, c);
     if (e.then) {
       const d = this;
       e.then(function(f) {
@@ -834,74 +886,74 @@ function sa(a, c, b) {
 function U(a) {
   this.limit = a && !0 !== a ? a : 1000;
   this.cache = new Map();
-  this.A = "";
+  this.h = "";
 }
-U.prototype.set = function(a, c) {
-  this.cache.set(this.A = a, c);
+U.prototype.set = function(a, b) {
+  this.cache.set(this.h = a, b);
   this.cache.size > this.limit && this.cache.delete(this.cache.keys().next().value);
 };
 U.prototype.get = function(a) {
-  const c = this.cache.get(a);
-  c && this.A !== a && (this.cache.delete(a), this.cache.set(this.A = a, c));
-  return c;
+  const b = this.cache.get(a);
+  b && this.h !== a && (this.cache.delete(a), this.cache.set(this.h = a, b));
+  return b;
 };
 U.prototype.remove = function(a) {
-  for (const c of this.cache) {
-    const b = c[0];
-    c[1].includes(a) && this.cache.delete(b);
+  for (const b of this.cache) {
+    const c = b[0];
+    b[1].includes(a) && this.cache.delete(c);
   }
 };
 U.prototype.clear = function() {
   this.cache.clear();
-  this.A = "";
+  this.h = "";
 };
-const ta = {normalize:function(a) {
+const ua = {normalize:function(a) {
   return a.toLowerCase();
 }, dedupe:!1};
-const ua = new Map([["b", "p"], ["v", "f"], ["w", "f"], ["z", "s"], ["x", "s"], ["d", "t"], ["n", "m"], ["c", "k"], ["g", "k"], ["j", "k"], ["q", "k"], ["i", "e"], ["y", "e"], ["u", "o"]]);
-const va = new Map([["ae", "a"], ["oe", "o"], ["sh", "s"], ["kh", "k"], ["th", "t"], ["pf", "f"]]), wa = [/([^aeo])h(.)/g, "$1$2", /([aeo])h([^aeo]|$)/g, "$1$2", /([^0-9])\1+/g, "$1"];
-const xa = {a:"", e:"", i:"", o:"", u:"", y:"", b:1, f:1, p:1, v:1, c:2, g:2, j:2, k:2, q:2, s:2, x:2, z:2, "\u00df":2, d:3, t:3, l:4, m:5, n:5, r:6};
-const ya = /[\x00-\x7F]+/g;
+const va = new Map([["b", "p"], ["v", "f"], ["w", "f"], ["z", "s"], ["x", "s"], ["d", "t"], ["n", "m"], ["c", "k"], ["g", "k"], ["j", "k"], ["q", "k"], ["i", "e"], ["y", "e"], ["u", "o"]]);
+const wa = new Map([["ae", "a"], ["oe", "o"], ["sh", "s"], ["kh", "k"], ["th", "t"], ["pf", "f"]]), xa = [/([^aeo])h(.)/g, "$1$2", /([aeo])h([^aeo]|$)/g, "$1$2", /([^0-9])\1+/g, "$1"];
+const ya = {a:"", e:"", i:"", o:"", u:"", y:"", b:1, f:1, p:1, v:1, c:2, g:2, j:2, k:2, q:2, s:2, x:2, z:2, "\u00df":2, d:3, t:3, l:4, m:5, n:5, r:6};
 const za = /[\x00-\x7F]+/g;
 const Aa = /[\x00-\x7F]+/g;
-var Ba = {LatinExact:{normalize:!1, dedupe:!1}, LatinDefault:ta, LatinSimple:{normalize:!0, dedupe:!0}, LatinBalance:{normalize:!0, dedupe:!0, mapper:ua}, LatinAdvanced:{normalize:!0, dedupe:!0, mapper:ua, matcher:va, replacer:wa}, LatinExtra:{normalize:!0, dedupe:!0, mapper:ua, replacer:wa.concat([/(?!^)[aeo]/g, ""]), matcher:va}, LatinSoundex:{normalize:!0, dedupe:!1, include:{letter:!0}, finalize:function(a) {
-  for (let b = 0; b < a.length; b++) {
-    var c = a[b];
-    let e = c.charAt(0), d = xa[e];
-    for (let f = 1, g; f < c.length && (g = c.charAt(f), "h" === g || "w" === g || !(g = xa[g]) || g === d || (e += g, d = g, 4 !== e.length)); f++) {
+const Ba = /[\x00-\x7F]+/g;
+var Ca = {LatinExact:{normalize:!1, dedupe:!1}, LatinDefault:ua, LatinSimple:{normalize:!0, dedupe:!0}, LatinBalance:{normalize:!0, dedupe:!0, mapper:va}, LatinAdvanced:{normalize:!0, dedupe:!0, mapper:va, matcher:wa, replacer:xa}, LatinExtra:{normalize:!0, dedupe:!0, mapper:va, replacer:xa.concat([/(?!^)[aeo]/g, ""]), matcher:wa}, LatinSoundex:{normalize:!0, dedupe:!1, include:{letter:!0}, finalize:function(a) {
+  for (let c = 0; c < a.length; c++) {
+    var b = a[c];
+    let e = b.charAt(0), d = ya[e];
+    for (let f = 1, g; f < b.length && (g = b.charAt(f), "h" === g || "w" === g || !(g = ya[g]) || g === d || (e += g, d = g, 4 !== e.length)); f++) {
     }
-    a[b] = e;
+    a[c] = e;
   }
 }}, ArabicDefault:{rtl:!0, normalize:!1, dedupe:!0, prepare:function(a) {
-  return ("" + a).replace(ya, " ");
+  return ("" + a).replace(za, " ");
 }}, CjkDefault:{normalize:!1, dedupe:!0, split:"", prepare:function(a) {
-  return ("" + a).replace(za, "");
+  return ("" + a).replace(Aa, "");
 }}, CyrillicDefault:{normalize:!1, dedupe:!0, prepare:function(a) {
-  return ("" + a).replace(Aa, " ");
+  return ("" + a).replace(Ba, " ");
 }}};
-const Ca = {memory:{resolution:1}, performance:{resolution:6, fastupdate:!0, context:{depth:1, resolution:3}}, match:{tokenize:"forward"}, score:{resolution:9, context:{depth:2, resolution:9}}};
+const Da = {memory:{resolution:1}, performance:{resolution:6, fastupdate:!0, context:{depth:1, resolution:3}}, match:{tokenize:"forward"}, score:{resolution:9, context:{depth:2, resolution:9}}};
 C();
-V.prototype.add = function(a, c, b, e) {
-  if (c && (a || 0 === a)) {
-    if (!e && !b && this.reg.has(a)) {
-      return this.update(a, c);
+V.prototype.add = function(a, b, c, e) {
+  if (b && (a || 0 === a)) {
+    if (!e && !c && this.reg.has(a)) {
+      return this.update(a, b);
     }
-    c = this.encoder.encode(c);
-    if (e = c.length) {
-      const l = C(), m = C(), n = this.depth, t = this.resolution;
-      for (let p = 0; p < e; p++) {
-        let r = c[this.rtl ? e - 1 - p : p];
-        var d = r.length;
-        if (d && (n || !m[r])) {
-          var f = this.score ? this.score(c, r, p, null, 0) : W(t, e, p), g = "";
+    b = this.encoder.encode(b);
+    if (e = b.length) {
+      const l = C(), m = C(), r = this.depth, t = this.resolution;
+      for (let q = 0; q < e; q++) {
+        let n = b[this.rtl ? e - 1 - q : q];
+        var d = n.length;
+        if (d && (r || !m[n])) {
+          var f = this.score ? this.score(b, n, q, null, 0) : W(t, e, q), g = "";
           switch(this.tokenize) {
             case "full":
               if (2 < d) {
                 for (f = 0; f < d; f++) {
                   for (var h = d; h > f; h--) {
-                    g = r.substring(f, h);
-                    var k = this.score ? this.score(c, r, p, g, f) : W(t, e, p, d, f);
-                    X(this, m, g, k, a, b);
+                    g = n.substring(f, h);
+                    var k = this.score ? this.score(b, n, q, g, f) : W(t, e, q, d, f);
+                    X(this, m, g, k, a, c);
                   }
                 }
                 break;
@@ -909,24 +961,24 @@ V.prototype.add = function(a, c, b, e) {
             case "reverse":
               if (1 < d) {
                 for (h = d - 1; 0 < h; h--) {
-                  g = r[h] + g, k = this.score ? this.score(c, r, p, g, h) : W(t, e, p, d, h), X(this, m, g, k, a, b);
+                  g = n[h] + g, k = this.score ? this.score(b, n, q, g, h) : W(t, e, q, d, h), X(this, m, g, k, a, c);
                 }
                 g = "";
               }
             case "forward":
               if (1 < d) {
                 for (h = 0; h < d; h++) {
-                  g += r[h], X(this, m, g, f, a, b);
+                  g += n[h], X(this, m, g, f, a, c);
                 }
                 break;
               }
             default:
-              if (X(this, m, r, f, a, b), n && 1 < e && p < e - 1) {
-                for (d = C(), g = this.P, f = r, h = Math.min(n + 1, e - p), d[f] = 1, k = 1; k < h; k++) {
-                  if ((r = c[this.rtl ? e - 1 - p - k : p + k]) && !d[r]) {
-                    d[r] = 1;
-                    const u = this.score ? this.score(c, f, p, r, k) : W(g + (e / 2 > g ? 0 : 1), e, p, h - 1, k - 1), v = this.bidirectional && r > f;
-                    X(this, l, v ? f : r, u, a, b, v ? r : f);
+              if (X(this, m, n, f, a, c), r && 1 < e && q < e - 1) {
+                for (d = C(), g = this.P, f = n, h = Math.min(r + 1, e - q), d[f] = 1, k = 1; k < h; k++) {
+                  if ((n = b[this.rtl ? e - 1 - q - k : q + k]) && !d[n]) {
+                    d[n] = 1;
+                    const u = this.score ? this.score(b, f, q, n, k) : W(g + (e / 2 > g ? 0 : 1), e, q, h - 1, k - 1), v = this.bidirectional && n > f;
+                    X(this, l, v ? f : n, u, a, c, v ? n : f);
                   }
                 }
               }
@@ -938,150 +990,152 @@ V.prototype.add = function(a, c, b, e) {
   }
   return this;
 };
-function X(a, c, b, e, d, f, g) {
+function X(a, b, c, e, d, f, g) {
   let h = g ? a.ctx : a.map, k;
-  if (!c[b] || g && !(k = c[b])[g]) {
-    g ? (c = k || (c[b] = C()), c[g] = 1, (k = h.get(g)) ? h = k : h.set(g, h = new Map())) : c[b] = 1, (k = h.get(b)) ? h = k : h.set(b, h = []), h = h[e] || (h[e] = []), f && h.includes(d) || (h.push(d), a.fastupdate && ((c = a.reg.get(d)) ? c.push(h) : a.reg.set(d, [h])));
+  if (!b[c] || g && !(k = b[c])[g]) {
+    g ? (b = k || (b[c] = C()), b[g] = 1, (k = h.get(g)) ? h = k : h.set(g, h = new Map())) : b[c] = 1, (k = h.get(c)) ? h = k : h.set(c, h = []), h = h[e] || (h[e] = []), f && h.includes(d) || (h.push(d), a.fastupdate && ((b = a.reg.get(d)) ? b.push(h) : a.reg.set(d, [h])));
   }
 }
-function W(a, c, b, e, d) {
-  return b && 1 < a ? c + (e || 0) <= a ? b + (d || 0) : (a - 1) / (c + (e || 0)) * (b + (d || 0)) + 1 | 0 : 0;
+function W(a, b, c, e, d) {
+  return c && 1 < a ? b + (e || 0) <= a ? c + (d || 0) : (a - 1) / (b + (e || 0)) * (c + (d || 0)) + 1 | 0 : 0;
 }
-;function Da(a, c, b) {
+;function Ea(a, b, c) {
   if (1 === a.length) {
-    return a = a[0], a = b || a.length > c ? c ? a.slice(b, b + c) : a.slice(b) : a;
+    return a = a[0], a = c || a.length > b ? b ? a.slice(c, c + b) : a.slice(c) : a;
   }
   let e = [];
   for (let d = 0, f, g; d < a.length; d++) {
     if ((f = a[d]) && (g = f.length)) {
-      if (b) {
-        if (b >= g) {
-          b -= g;
+      if (c) {
+        if (c >= g) {
+          c -= g;
           continue;
         }
-        b < g && (f = c ? f.slice(b, b + c) : f.slice(b), g = f.length, b = 0);
+        c < g && (f = b ? f.slice(c, c + b) : f.slice(c), g = f.length, c = 0);
       }
       if (e.length) {
-        g > c && (f = f.slice(0, c), g = f.length), e.push(f);
+        g > b && (f = f.slice(0, b), g = f.length), e.push(f);
       } else {
-        if (g >= c) {
-          return g > c && (f = f.slice(0, c)), f;
+        if (g >= b) {
+          return g > b && (f = f.slice(0, b)), f;
         }
         e = [f];
       }
-      c -= g;
-      if (!c) {
+      b -= g;
+      if (!b) {
         break;
       }
     }
   }
   return e.length ? e = 1 < e.length ? [].concat.apply([], e) : e[0] : e;
 }
-;V.prototype.search = function(a, c, b) {
-  b || (!c && H(a) ? (b = a, a = "") : H(c) && (b = c, c = 0));
+;V.prototype.search = function(a, b, c) {
+  c || (!b && H(a) ? (c = a, a = "") : H(b) && (c = b, b = 0));
   var e = [], d = 0;
-  if (b) {
-    a = b.query || a;
-    c = b.limit || c;
-    d = b.offset || 0;
-    var f = b.context;
-    var g = b.suggest;
+  if (c) {
+    a = c.query || a;
+    b = c.limit || b;
+    d = c.offset || 0;
+    var f = c.context;
+    var g = c.suggest;
+    var h = !0;
+    var k = c.resolution;
+  } else {
+    h = !0;
   }
-  a = this.encoder.encode(a);
-  b = a.length;
-  c || (c = 100);
-  if (1 === b) {
-    return Y.call(this, a[0], "", c, d);
+  var l = this.encoder.encode(a);
+  c = l.length;
+  b || !h || (b = 100);
+  if (1 === c) {
+    return Y.call(this, l[0], "", b, d);
   }
   f = this.depth && !1 !== f;
-  if (2 === b && f && !g) {
-    return Y.call(this, a[0], a[1], c, d);
+  if (2 === c && f && !g) {
+    return Y.call(this, l[0], l[1], b, d);
   }
-  var h = 0, k = 0;
-  if (1 < b) {
-    var l = C();
-    const n = [];
-    for (let t = 0, p; t < b; t++) {
-      if ((p = a[t]) && !l[p]) {
-        if (g || Z(this, p)) {
-          n.push(p), l[p] = 1;
+  let m = h = 0;
+  if (1 < c) {
+    const t = C(), q = [];
+    for (let n = 0, u; n < c; n++) {
+      if ((u = l[n]) && !t[u]) {
+        if (g || Z(this, u)) {
+          q.push(u), t[u] = 1;
         } else {
           return e;
         }
-        const r = p.length;
-        h = Math.max(h, r);
-        k = k ? Math.min(k, r) : r;
+        const v = u.length;
+        h = Math.max(h, v);
+        m = m ? Math.min(m, v) : v;
       }
     }
-    a = n;
-    b = a.length;
+    l = q;
+    c = a.length;
   }
-  if (!b) {
+  if (!c) {
     return e;
   }
-  l = 0;
-  if (1 === b) {
-    return Y.call(this, a[0], "", c, d);
+  a = 0;
+  if (1 === c) {
+    return Y.call(this, l[0], "", b, d);
   }
-  if (2 === b && f && !g) {
-    return Y.call(this, a[0], a[1], c, d);
+  if (2 === c && f && !g) {
+    return Y.call(this, l[0], l[1], b, d);
   }
-  if (1 < b) {
+  if (1 < c) {
     if (f) {
-      var m = a[0];
-      l = 1;
+      var r = l[0];
+      a = 1;
     } else {
-      9 < h && 3 < h / k && a.sort(aa);
+      9 < h && 3 < h / m && l.sort(aa);
     }
   }
-  for (let n, t; l < b; l++) {
-    t = a[l];
-    m ? (n = Z(this, t, m), n = Ea(n, e, g, this.P), g && !1 === n && e.length || (m = t)) : (n = Z(this, t, ""), n = Ea(n, e, g, this.resolution));
-    if (n) {
-      return n;
+  k || 0 === k || (k = this.resolution);
+  for (let t, q; a < c; a++) {
+    q = l[a];
+    r ? (t = Z(this, q, r), t = Fa(t, e, g, this.P), g && !1 === t && e.length || (r = q)) : (t = Z(this, q, ""), t = Fa(t, e, g, k));
+    if (t) {
+      return t;
     }
-    if (g && l === b - 1) {
+    if (g && a === c - 1) {
       f = e.length;
       if (!f) {
-        if (m) {
-          m = "";
-          l = -1;
+        if (r) {
+          r = "";
+          a = -1;
           continue;
         }
         return e;
       }
       if (1 === f) {
-        return Da(e[0], c, d);
+        return Ea(e[0], b, d);
       }
     }
   }
   a: {
-    a = e;
-    e = this.resolution;
-    m = g;
-    b = a.length;
+    r = g;
+    c = e.length;
     g = [];
     f = C();
-    for (let n = 0, t, p, r, u; n < e; n++) {
-      for (k = 0; k < b; k++) {
-        if (r = a[k], n < r.length && (t = r[n])) {
-          for (l = 0; l < t.length; l++) {
-            p = t[l], (h = f[p]) ? f[p]++ : (h = 0, f[p] = 1), u = g[h] || (g[h] = []), u.push(p);
+    for (let t = 0, q, n, u, v; t < k; t++) {
+      for (a = 0; a < c; a++) {
+        if (u = e[a], t < u.length && (q = u[t])) {
+          for (h = 0; h < q.length; h++) {
+            n = q[h], (l = f[n]) ? f[n]++ : (l = 0, f[n] = 1), v = g[l] || (g[l] = []), v.push(n);
           }
         }
       }
     }
-    if (a = g.length) {
-      if (m) {
+    if (k = g.length) {
+      if (r) {
         if (1 < g.length) {
           b: {
-            for (a = [], e = C(), m = g.length, h = m - 1; 0 <= h; h--) {
-              for (m = g[h], f = m.length, k = 0; k < f; k++) {
-                if (b = m[k], !e[b]) {
-                  if (e[b] = 1, d) {
+            for (k = [], e = C(), r = g.length, l = r - 1; 0 <= l; l--) {
+              for (r = g[l], f = r.length, a = 0; a < f; a++) {
+                if (c = r[a], !e[c]) {
+                  if (e[c] = 1, d) {
                     d--;
                   } else {
-                    if (a.push(b), a.length === c) {
+                    if (k.push(c), k.length === b) {
                       break b;
                     }
                   }
@@ -1090,18 +1144,18 @@ function W(a, c, b, e, d) {
             }
           }
         } else {
-          a = (g = g[0]).length > c || d ? g.slice(d, c + d) : g;
+          k = (g = g[0]).length > b || d ? g.slice(d, b + d) : g;
         }
-        g = a;
+        g = k;
       } else {
-        if (a < b) {
+        if (k < c) {
           e = [];
           break a;
         }
-        g = g[a - 1];
-        if (c || d) {
-          if (g.length > c || d) {
-            g = g.slice(d, c + d);
+        g = g[k - 1];
+        if (b || d) {
+          if (g.length > b || d) {
+            g = g.slice(d, b + d);
           }
         }
       }
@@ -1110,10 +1164,10 @@ function W(a, c, b, e, d) {
   }
   return e;
 };
-function Y(a, c, b, e) {
-  return (a = Z(this, a, c)) && a.length ? Da(a, b, e) : [];
+function Y(a, b, c, e) {
+  return (a = Z(this, a, b)) && a.length ? Ea(a, c, e) : [];
 }
-function Ea(a, c, b, e) {
+function Fa(a, b, c, e) {
   let d = [];
   if (a) {
     e = Math.min(a.length, e);
@@ -1121,131 +1175,130 @@ function Ea(a, c, b, e) {
       (g = a[f]) && g && (d[f] = g);
     }
     if (d.length) {
-      c.push(d);
+      b.push(d);
       return;
     }
   }
-  return !b && d;
+  return !c && d;
 }
-function Z(a, c, b) {
+function Z(a, b, c) {
   let e;
-  b && (e = a.bidirectional && c > b);
-  a = b ? (a = a.ctx.get(e ? c : b)) && a.get(e ? b : c) : a.map.get(c);
+  c && (e = a.bidirectional && b > c);
+  a = c ? (a = a.ctx.get(e ? b : c)) && a.get(e ? c : b) : a.map.get(b);
   return a;
 }
-;V.prototype.remove = function(a, c) {
-  const b = this.reg.size && (this.fastupdate ? this.reg.get(a) : this.reg.has(a));
-  if (b) {
+;V.prototype.remove = function(a, b) {
+  const c = this.reg.size && (this.fastupdate ? this.reg.get(a) : this.reg.has(a));
+  if (c) {
     if (this.fastupdate) {
-      for (let e = 0, d; e < b.length; e++) {
-        if (d = b[e]) {
+      for (let e = 0, d; e < c.length; e++) {
+        if (d = c[e]) {
           if (2 > d.length) {
             d.pop();
           } else {
             const f = d.indexOf(a);
-            f === b.length - 1 ? d.pop() : d.splice(f, 1);
+            f === c.length - 1 ? d.pop() : d.splice(f, 1);
           }
         }
       }
     } else {
-      Fa(this.map, a), this.depth && Fa(this.ctx, a);
+      Ga(this.map, a), this.depth && Ga(this.ctx, a);
     }
-    c || this.reg.delete(a);
+    b || this.reg.delete(a);
   }
   this.cache && this.cache.remove(a);
   return this;
 };
-function Fa(a, c) {
-  let b = 0;
+function Ga(a, b) {
+  let c = 0;
   if (a.constructor === Array) {
     for (let e = 0, d, f; e < a.length; e++) {
       if ((d = a[e]) && d.length) {
-        if (f = d.indexOf(c), 0 <= f) {
-          1 < d.length ? (d.splice(f, 1), b++) : delete a[e];
+        if (f = d.indexOf(b), 0 <= f) {
+          1 < d.length ? (d.splice(f, 1), c++) : delete a[e];
           break;
         } else {
-          b++;
+          c++;
         }
       }
     }
   } else {
     for (let e of a) {
-      const d = e[0], f = Fa(e[1], c);
-      f ? b += f : a.delete(d);
+      const d = e[0], f = Ga(e[1], b);
+      f ? c += f : a.delete(d);
     }
   }
-  return b;
+  return c;
 }
-;function V(a, c) {
+;function V(a, b) {
   if (!this || this.constructor !== V) {
     return new V(a);
   }
   if (a) {
-    var b = E(a) ? a : a.preset;
-    b && (Ca[b] || console.warn("Preset not found: " + b), a = Object.assign({}, Ca[b], a));
+    var c = E(a) ? a : a.preset;
+    c && (Da[c] || console.warn("Preset not found: " + c), a = Object.assign({}, Da[c], a));
   } else {
     a = {};
   }
-  b = a.context || {};
-  const e = E(a.encoder) ? Ba[a.encoder] : a.encode || a.encoder || ta;
-  this.encoder = e.encode ? e : "object" === typeof e ? new K(e) : {encode:e};
-  let d;
+  c = a.context;
+  const e = !0 === c ? {depth:1} : c || {}, d = E(a.encoder) ? Ca[a.encoder] : a.encode || a.encoder || ua;
+  this.encoder = d.encode ? d : "object" === typeof d ? new L(d) : {encode:d};
   this.resolution = a.resolution || 9;
-  this.tokenize = d = a.tokenize || "strict";
-  this.depth = "strict" === d && b.depth || 0;
-  this.bidirectional = !1 !== b.bidirectional;
+  this.tokenize = c = a.tokenize || "strict";
+  this.depth = "strict" === c && e.depth || 0;
+  this.bidirectional = !1 !== e.bidirectional;
   this.fastupdate = !!a.fastupdate;
   this.score = a.score || null;
-  d = !1;
+  c = !1;
   this.map = new Map();
   this.ctx = new Map();
-  this.reg = c || (this.fastupdate ? new Map() : new Set());
-  this.P = b.resolution || 1;
-  this.rtl = e.rtl || a.rtl || !1;
-  this.cache = (d = a.cache || null) && new U(d);
+  this.reg = b || (this.fastupdate ? new Map() : new Set());
+  this.P = e.resolution || 3;
+  this.rtl = d.rtl || a.rtl || !1;
+  this.cache = (c = a.cache || null) && new U(c);
 }
-x = V.prototype;
-x.clear = function() {
+w = V.prototype;
+w.clear = function() {
   this.map.clear();
   this.ctx.clear();
   this.reg.clear();
   this.cache && this.cache.clear();
   return this;
 };
-x.append = function(a, c) {
-  return this.add(a, c, !0);
+w.append = function(a, b) {
+  return this.add(a, b, !0);
 };
-x.contain = function(a) {
+w.contain = function(a) {
   return this.reg.has(a);
 };
-x.update = function(a, c) {
-  const b = this, e = this.remove(a);
-  return e && e.then ? e.then(() => b.add(a, c)) : this.add(a, c);
+w.update = function(a, b) {
+  const c = this, e = this.remove(a);
+  return e && e.then ? e.then(() => c.add(a, b)) : this.add(a, b);
 };
-function Ga(a) {
-  let c = 0;
+function Ha(a) {
+  let b = 0;
   if (a.constructor === Array) {
-    for (let b = 0, e; b < a.length; b++) {
-      (e = a[b]) && (c += e.length);
+    for (let c = 0, e; c < a.length; c++) {
+      (e = a[c]) && (b += e.length);
     }
   } else {
-    for (const b of a) {
-      const e = b[0], d = Ga(b[1]);
-      d ? c += d : a.delete(e);
+    for (const c of a) {
+      const e = c[0], d = Ha(c[1]);
+      d ? b += d : a.delete(e);
     }
   }
-  return c;
+  return b;
 }
-x.cleanup = function() {
+w.cleanup = function() {
   if (!this.fastupdate) {
     return console.info('Cleanup the index isn\'t required when not using "fastupdate".'), this;
   }
-  Ga(this.map);
-  this.depth && Ga(this.ctx);
+  Ha(this.map);
+  this.depth && Ha(this.ctx);
   return this;
 };
-x.searchCache = sa;
-x.export = function(a, c, b, e = 0) {
+w.searchCache = ta;
+w.export = function(a, b, c, e = 0) {
   let d, f;
   switch(e) {
     case 0:
@@ -1258,7 +1311,7 @@ x.export = function(a, c, b, e = 0) {
       break;
     case 2:
       d = "map";
-      f = N(this.map, this.reg.size);
+      f = O(this.map, this.reg.size);
       break;
     case 3:
       d = "ctx";
@@ -1267,40 +1320,40 @@ x.export = function(a, c, b, e = 0) {
     default:
       return;
   }
-  return P.call(this, a, c, d, f, b, e);
+  return Q.call(this, a, b, d, f, c, e);
 };
-x.import = function(a, c) {
-  if (c) {
-    switch(E(c) && (c = JSON.parse(c)), a = a.split("."), "json" === a[a.length - 1] && a.pop(), a = 1 < a.length ? a[1] : a[0], a) {
+w.import = function(a, b) {
+  if (b) {
+    switch(E(b) && (b = JSON.parse(b)), a = a.split("."), "json" === a[a.length - 1] && a.pop(), a = 1 < a.length ? a[1] : a[0], a) {
       case "reg":
         this.fastupdate = !1;
-        this.reg = ma(c, this.reg);
+        this.reg = ma(b, this.reg);
         break;
       case "map":
-        this.map = O(c, this.map);
+        this.map = P(b, this.map);
         break;
       case "ctx":
-        this.ctx = ka(c, this.ctx);
+        this.ctx = ka(b, this.ctx);
     }
   }
 };
-x.serialize = function(a = !0) {
+w.serialize = function(a = !0) {
   if (!this.reg.size) {
     return "";
   }
-  let c = "", b = "";
+  let b = "", c = "";
   for (var e of this.reg.keys()) {
-    b || (b = typeof e), c += (c ? "," : "") + ("string" === b ? '"' + e + '"' : e);
+    c || (c = typeof e), b += (b ? "," : "") + ("string" === c ? '"' + e + '"' : e);
   }
-  c = "index.reg=new Set([" + c + "]);";
+  b = "index.reg=new Set([" + b + "]);";
   e = "";
   for (var d of this.map.entries()) {
     var f = d[0], g = d[1], h = "";
-    for (let m = 0, n; m < g.length; m++) {
-      n = g[m] || [""];
+    for (let m = 0, r; m < g.length; m++) {
+      r = g[m] || [""];
       var k = "";
-      for (var l = 0; l < n.length; l++) {
-        k += (k ? "," : "") + ("string" === b ? '"' + n[l] + '"' : n[l]);
+      for (var l = 0; l < r.length; l++) {
+        k += (k ? "," : "") + ("string" === c ? '"' + r[l] + '"' : r[l]);
       }
       k = "[" + k + "]";
       h += (h ? "," : "") + k;
@@ -1313,15 +1366,15 @@ x.serialize = function(a = !0) {
   for (const m of this.ctx.entries()) {
     f = m[0];
     g = m[1];
-    for (const n of g.entries()) {
-      g = n[0];
-      h = n[1];
+    for (const r of g.entries()) {
+      g = r[0];
+      h = r[1];
       k = "";
-      for (let t = 0, p; t < h.length; t++) {
-        p = h[t] || [""];
+      for (let t = 0, q; t < h.length; t++) {
+        q = h[t] || [""];
         l = "";
-        for (let r = 0; r < p.length; r++) {
-          l += (l ? "," : "") + ("string" === b ? '"' + p[r] + '"' : p[r]);
+        for (let n = 0; n < q.length; n++) {
+          l += (l ? "," : "") + ("string" === c ? '"' + q[n] + '"' : q[n]);
         }
         l = "[" + l + "]";
         k += (k ? "," : "") + l;
@@ -1332,9 +1385,9 @@ x.serialize = function(a = !0) {
     }
   }
   d = "index.ctx=new Map([" + d + "]);";
-  return a ? "function inject(index){" + c + e + d + "}" : c + e + d;
+  return a ? "function inject(index){" + b + e + d + "}" : b + e + d;
 };
 ia(V.prototype);
-export default {Index:V, Charset:Ba, Encoder:K, Document:Q, Worker:null, Resolver:null, IndexedDB:null, Language:{}};
+export default {Index:V, Charset:Ca, Encoder:L, Document:R, Worker:null, Resolver:null, IndexedDB:null, Language:{}};
 
-export const Index=V;export const  Charset=Ba;export const  Encoder=K;export const  Document=Q;export const  Worker=null;export const  Resolver=null;export const  IndexedDB=null;export const  Language={};
\ No newline at end of file
+export const Index=V;export const  Charset=Ca;export const  Encoder=L;export const  Document=R;export const  Worker=null;export const  Resolver=null;export const  IndexedDB=null;export const  Language={};
\ No newline at end of file
diff --git a/dist/flexsearch.compact.module.min.js b/dist/flexsearch.compact.module.min.js
index 153b5bb..a2a1520 100644
--- a/dist/flexsearch.compact.module.min.js
+++ b/dist/flexsearch.compact.module.min.js
@@ -5,51 +5,54 @@
  * Hosted by Nextapps GmbH
  * https://github.com/nextapps-de/flexsearch
  */
-var x;function B(a,b,c){const e=typeof c,d=typeof a;if("undefined"!==e){if("undefined"!==d){if(c){if("function"===d&&e===d)return function(h){return a(c(h))};b=a.constructor;if(b===c.constructor){if(b===Array)return c.concat(a);if(b===Map){var g=new Map(c);for(var f of a)g.set(f[0],f[1]);return g}if(b===Set){f=new Set(c);for(g of a.values())f.add(g);return f}}}return a}return c}return"undefined"===d?b:a}function D(){return Object.create(null)}function aa(a,b){return b.length-a.length}
+var w;function B(a,b,c){const e=typeof c,d=typeof a;if("undefined"!==e){if("undefined"!==d){if(c){if("function"===d&&e===d)return function(h){return a(c(h))};b=a.constructor;if(b===c.constructor){if(b===Array)return c.concat(a);if(b===Map){var g=new Map(c);for(var f of a)g.set(f[0],f[1]);return g}if(b===Set){f=new Set(c);for(g of a.values())f.add(g);return f}}}return a}return c}return"undefined"===d?b:a}function D(){return Object.create(null)}function aa(a,b){return b.length-a.length}
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 "u"],["\u00fc","u"],["\u00fd","y"],["\u00ff","y"],["\u0101","a"],["\u0103","a"],["\u0105","a"],["\u0107","c"],["\u0109","c"],["\u010b","c"],["\u010d","c"],["\u010f","d"],["\u0113","e"],["\u0115","e"],["\u0117","e"],["\u0119","e"],["\u011b","e"],["\u011d","g"],["\u011f","g"],["\u0121","g"],["\u0123","g"],["\u0125","h"],["\u0129","i"],["\u012b","i"],["\u012d","i"],["\u012f","i"],["\u0133","ij"],["\u0135","j"],["\u0137","k"],["\u013a","l"],["\u013c","l"],["\u013e","l"],["\u0140","l"],["\u0144","n"],
 ["\u0146","n"],["\u0148","n"],["\u0149","n"],["\u014d","o"],["\u014f","o"],["\u0151","o"],["\u0155","r"],["\u0157","r"],["\u0159","r"],["\u015b","s"],["\u015d","s"],["\u015f","s"],["\u0161","s"],["\u0163","t"],["\u0165","t"],["\u0169","u"],["\u016b","u"],["\u016d","u"],["\u016f","u"],["\u0171","u"],["\u0173","u"],["\u0175","w"],["\u0177","y"],["\u017a","z"],["\u017c","z"],["\u017e","z"],["\u017f","s"],["\u01a1","o"],["\u01b0","u"],["\u01c6","dz"],["\u01c9","lj"],["\u01cc","nj"],["\u01ce","a"],["\u01d0",
 "i"],["\u01d2","o"],["\u01d4","u"],["\u01d6","u"],["\u01d8","u"],["\u01da","u"],["\u01dc","u"],["\u01df","a"],["\u01e1","a"],["\u01e3","ae"],["\u00e6","ae"],["\u01fd","ae"],["\u01e7","g"],["\u01e9","k"],["\u01eb","o"],["\u01ed","o"],["\u01ef","\u0292"],["\u01f0","j"],["\u01f3","dz"],["\u01f5","g"],["\u01f9","n"],["\u01fb","a"],["\u01ff","\u00f8"],["\u0201","a"],["\u0203","a"],["\u0205","e"],["\u0207","e"],["\u0209","i"],["\u020b","i"],["\u020d","o"],["\u020f","o"],["\u0211","r"],["\u0213","r"],["\u0215",
 "u"],["\u0217","u"],["\u0219","s"],["\u021b","t"],["\u021f","h"],["\u0227","a"],["\u0229","e"],["\u022b","o"],["\u022d","o"],["\u022f","o"],["\u0231","o"],["\u0233","y"],["\u02b0","h"],["\u02b1","h"],["\u0266","h"],["\u02b2","j"],["\u02b3","r"],["\u02b4","\u0279"],["\u02b5","\u027b"],["\u02b6","\u0281"],["\u02b7","w"],["\u02b8","y"],["\u02e0","\u0263"],["\u02e1","l"],["\u02e2","s"],["\u02e3","x"],["\u02e4","\u0295"],["\u0390","\u03b9"],["\u03ac","\u03b1"],["\u03ad","\u03b5"],["\u03ae","\u03b7"],["\u03af",
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-["\u0477","\u0475"],["\u04c2","\u0436"],["\u04d1","\u0430"],["\u04d3","\u0430"],["\u04d7","\u0435"],["\u04db","\u04d9"],["\u04dd","\u0436"],["\u04df","\u0437"],["\u04e3","\u0438"],["\u04e5","\u0438"],["\u04e7","\u043e"],["\u04eb","\u04e9"],["\u04ed","\u044d"],["\u04ef","\u0443"],["\u04f1","\u0443"],["\u04f3","\u0443"],["\u04f5","\u0447"]];const ca=/[^\p{L}\p{N}]+/u,da=/(\d{3})/g,ea=/(\D)(\d{3})/g,fa=/(\d{3})(\D)/g,J="".normalize&&/[\u0300-\u036f]/g;function K(a){if(!this||this.constructor!==K)return new K(...arguments);for(let b=0;b<arguments.length;b++)this.assign(arguments[b])}
-K.prototype.assign=function(a){this.normalize=B(a.normalize,!0,this.normalize);let b=a.include,c=b||a.exclude||a.split;if("object"===typeof c){let e=!b,d="";a.include||(d+="\\p{Z}");c.letter&&(d+="\\p{L}");c.number&&(d+="\\p{N}",e=!!b);c.symbol&&(d+="\\p{S}");c.punctuation&&(d+="\\p{P}");c.control&&(d+="\\p{C}");if(c=c.char)d+="object"===typeof c?c.join(""):c;try{this.split=new RegExp("["+(b?"^":"")+d+"]+","u")}catch(g){this.split=/\s+/}this.numeric=e}else{try{this.split=B(c,ca,this.split)}catch(e){this.split=
+["\u0477","\u0475"],["\u04c2","\u0436"],["\u04d1","\u0430"],["\u04d3","\u0430"],["\u04d7","\u0435"],["\u04db","\u04d9"],["\u04dd","\u0436"],["\u04df","\u0437"],["\u04e3","\u0438"],["\u04e5","\u0438"],["\u04e7","\u043e"],["\u04eb","\u04e9"],["\u04ed","\u044d"],["\u04ef","\u0443"],["\u04f1","\u0443"],["\u04f3","\u0443"],["\u04f5","\u0447"]];const ca=/[^\p{L}\p{N}]+/u,da=/(\d{3})/g,ea=/(\D)(\d{3})/g,fa=/(\d{3})(\D)/g,J="".normalize&&/[\u0300-\u036f]/g;function L(a){if(!this||this.constructor!==L)return new L(...arguments);for(let b=0;b<arguments.length;b++)this.assign(arguments[b])}w=L.prototype;
+w.assign=function(a){this.normalize=B(a.normalize,!0,this.normalize);let b=a.include,c=b||a.exclude||a.split;if("object"===typeof c){let e=!b,d="";a.include||(d+="\\p{Z}");c.letter&&(d+="\\p{L}");c.number&&(d+="\\p{N}",e=!!b);c.symbol&&(d+="\\p{S}");c.punctuation&&(d+="\\p{P}");c.control&&(d+="\\p{C}");if(c=c.char)d+="object"===typeof c?c.join(""):c;try{this.split=new RegExp("["+(b?"^":"")+d+"]+","u")}catch(g){this.split=/\s+/}this.numeric=e}else{try{this.split=B(c,ca,this.split)}catch(e){this.split=
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+function T(a,b){const c=a.split(":");let e=0;for(let d=0;d<c.length;d++)a=c[d],"]"===a[a.length-1]&&(a=a.substring(0,a.length-2))&&(b[e]=!0),a&&(c[e++]=a);e<c.length&&(c.length=e);return 1<e?c:c[0]}w=R.prototype;w.append=function(a,b){return this.add(a,b,!0)};w.update=function(a,b){return this.remove(a).add(a,b)};
+w.remove=function(a){G(a)&&(a=I(a,this.key));for(var b of this.index.values())b.remove(a,!0);if(this.reg.has(a)){if(this.tag&&!this.fastupdate)for(let c of this.tag.values())for(let e of c){b=e[0];const d=e[1],g=d.indexOf(a);-1<g&&(1<d.length?d.splice(g,1):c.delete(b))}this.store&&this.store.delete(a);this.reg.delete(a)}this.cache&&this.cache.remove(a);return this};
+w.clear=function(){for(const a of this.index.values())a.clear();if(this.tag)for(const a of this.tag.values())a.clear();this.store&&this.store.clear();return this};w.contain=function(a){return this.reg.has(a)};w.cleanup=function(){for(const a of this.index.values())a.cleanup();return this};w.get=function(a){return this.store.get(a)};w.set=function(a,b){this.store.set(a,b);return this};w.searchCache=ta;
+w.export=function(a,b,c=0,e=0){if(c<this.field.length){const f=this.field[c];if((b=this.index.get(f).export(a,f,c,e=1))&&b.then){const h=this;return b.then(function(){return h.export(a,f,c+1)})}return this.export(a,f,c+1)}let d,g;switch(e){case 0:d="reg";g=la(this.reg);b=null;break;case 1:d="tag";g=ja(this.tag,this.reg.size);b=null;break;case 2:d="doc";g=O(this.store);b=null;break;case 3:d="cfg";g={};b=null;break;default:return}return Q.call(this,a,b,d,g,c,e)};
+w.import=function(a,b){if(b){E(b)&&(b=JSON.parse(b));a=a.split(".");"json"===a[a.length-1]&&a.pop();var c=2<a.length?a[0]:"";a=2<a.length?a[2]:a[1];if(c)return this.index.get(c).import(a,b);switch(a){case "reg":this.fastupdate=!1;this.reg=ma(b,this.reg);for(let e=0,d;e<this.field.length;e++)d=this.index.get(this.field[e]),d.fastupdate=!1,d.reg=this.reg;break;case "tag":this.tag=ka(b,this.tag);break;case "doc":this.store=P(b,this.store)}}};ia(R.prototype);function ta(a,b,c){a=("object"===typeof a?""+a.query:a).toLowerCase();let e=this.cache.get(a);if(!e){e=this.search(a,b,c);if(e.then){const d=this;e.then(function(g){d.cache.set(a,g);return g})}this.cache.set(a,e)}return e}function U(a){this.limit=a&&!0!==a?a:1E3;this.cache=new Map;this.h=""}U.prototype.set=function(a,b){this.cache.set(this.h=a,b);this.cache.size>this.limit&&this.cache.delete(this.cache.keys().next().value)};
+U.prototype.get=function(a){const b=this.cache.get(a);b&&this.h!==a&&(this.cache.delete(a),this.cache.set(this.h=a,b));return b};U.prototype.remove=function(a){for(const b of this.cache){const c=b[0];b[1].includes(a)&&this.cache.delete(c)}};U.prototype.clear=function(){this.cache.clear();this.h=""};const ua={normalize:function(a){return a.toLowerCase()},dedupe:!1};const va=new Map([["b","p"],["v","f"],["w","f"],["z","s"],["x","s"],["d","t"],["n","m"],["c","k"],["g","k"],["j","k"],["q","k"],["i","e"],["y","e"],["u","o"]]);const wa=new Map([["ae","a"],["oe","o"],["sh","s"],["kh","k"],["th","t"],["pf","f"]]),xa=[/([^aeo])h(.)/g,"$1$2",/([aeo])h([^aeo]|$)/g,"$1$2",/([^0-9])\1+/g,"$1"];const ya={a:"",e:"",i:"",o:"",u:"",y:"",b:1,f:1,p:1,v:1,c:2,g:2,j:2,k:2,q:2,s:2,x:2,z:2,"\u00df":2,d:3,t:3,l:4,m:5,n:5,r:6};const za=/[\x00-\x7F]+/g;const Aa=/[\x00-\x7F]+/g;const Ba=/[\x00-\x7F]+/g;var Ca={LatinExact:{normalize:!1,dedupe:!1},LatinDefault:ua,LatinSimple:{normalize:!0,dedupe:!0},LatinBalance:{normalize:!0,dedupe:!0,mapper:va},LatinAdvanced:{normalize:!0,dedupe:!0,mapper:va,matcher:wa,replacer:xa},LatinExtra:{normalize:!0,dedupe:!0,mapper:va,replacer:xa.concat([/(?!^)[aeo]/g,""]),matcher:wa},LatinSoundex:{normalize:!0,dedupe:!1,include:{letter:!0},finalize:function(a){for(let c=0;c<a.length;c++){var b=a[c];let e=b.charAt(0),d=ya[e];for(let g=1,f;g<b.length&&(f=b.charAt(g),"h"===
+f||"w"===f||!(f=ya[f])||f===d||(e+=f,d=f,4!==e.length));g++);a[c]=e}}},ArabicDefault:{rtl:!0,normalize:!1,dedupe:!0,prepare:function(a){return(""+a).replace(za," ")}},CjkDefault:{normalize:!1,dedupe:!0,split:"",prepare:function(a){return(""+a).replace(Aa,"")}},CyrillicDefault:{normalize:!1,dedupe:!0,prepare:function(a){return(""+a).replace(Ba," ")}}};const Da={memory:{resolution:1},performance:{resolution:6,fastupdate:!0,context:{depth:1,resolution:3}},match:{tokenize:"forward"},score:{resolution:9,context:{depth:2,resolution:9}}};D();V.prototype.add=function(a,b,c,e){if(b&&(a||0===a)){if(!e&&!c&&this.reg.has(a))return this.update(a,b);b=this.encoder.encode(b);if(e=b.length){const l=D(),m=D(),r=this.depth,t=this.resolution;for(let p=0;p<e;p++){let n=b[this.rtl?e-1-p:p];var d=n.length;if(d&&(r||!m[n])){var g=this.score?this.score(b,n,p,null,0):W(t,e,p),f="";switch(this.tokenize){case "full":if(2<d){for(g=0;g<d;g++)for(var h=d;h>g;h--){f=n.substring(g,h);var k=this.score?this.score(b,n,p,f,g):W(t,e,p,d,g);X(this,m,f,k,a,c)}break}case "reverse":if(1<
+d){for(h=d-1;0<h;h--)f=n[h]+f,k=this.score?this.score(b,n,p,f,h):W(t,e,p,d,h),X(this,m,f,k,a,c);f=""}case "forward":if(1<d){for(h=0;h<d;h++)f+=n[h],X(this,m,f,g,a,c);break}default:if(X(this,m,n,g,a,c),r&&1<e&&p<e-1)for(d=D(),f=this.P,g=n,h=Math.min(r+1,e-p),d[g]=1,k=1;k<h;k++)if((n=b[this.rtl?e-1-p-k:p+k])&&!d[n]){d[n]=1;const u=this.score?this.score(b,g,p,n,k):W(f+(e/2>f?0:1),e,p,h-1,k-1),v=this.bidirectional&&n>g;X(this,l,v?g:n,u,a,c,v?n:g)}}}}this.fastupdate||this.reg.add(a)}}return this};
+function X(a,b,c,e,d,g,f){let h=f?a.ctx:a.map,k;if(!b[c]||f&&!(k=b[c])[f])f?(b=k||(b[c]=D()),b[f]=1,(k=h.get(f))?h=k:h.set(f,h=new Map)):b[c]=1,(k=h.get(c))?h=k:h.set(c,h=[]),h=h[e]||(h[e]=[]),g&&h.includes(d)||(h.push(d),a.fastupdate&&((b=a.reg.get(d))?b.push(h):a.reg.set(d,[h])))}function W(a,b,c,e,d){return c&&1<a?b+(e||0)<=a?c+(d||0):(a-1)/(b+(e||0))*(c+(d||0))+1|0:0};function Ea(a,b,c){if(1===a.length)return a=a[0],a=c||a.length>b?b?a.slice(c,c+b):a.slice(c):a;let e=[];for(let d=0,g,f;d<a.length;d++)if((g=a[d])&&(f=g.length)){if(c){if(c>=f){c-=f;continue}c<f&&(g=b?g.slice(c,c+b):g.slice(c),f=g.length,c=0)}if(e.length)f>b&&(g=g.slice(0,b),f=g.length),e.push(g);else{if(f>=b)return f>b&&(g=g.slice(0,b)),g;e=[g]}b-=f;if(!b)break}return e.length?e=1<e.length?[].concat.apply([],e):e[0]:e};V.prototype.search=function(a,b,c){c||(!b&&G(a)?(c=a,a=""):G(b)&&(c=b,b=0));var e=[],d=0;if(c){a=c.query||a;b=c.limit||b;d=c.offset||0;var g=c.context;var f=c.suggest;var h=!0;var k=c.resolution}else h=!0;var l=this.encoder.encode(a);c=l.length;b||!h||(b=100);if(1===c)return Y.call(this,l[0],"",b,d);g=this.depth&&!1!==g;if(2===c&&g&&!f)return Y.call(this,l[0],l[1],b,d);let m=h=0;if(1<c){const t=D(),p=[];for(let n=0,u;n<c;n++)if((u=l[n])&&!t[u]){if(f||Z(this,u))p.push(u),t[u]=1;else return e;const v=
+u.length;h=Math.max(h,v);m=m?Math.min(m,v):v}l=p;c=a.length}if(!c)return e;a=0;if(1===c)return Y.call(this,l[0],"",b,d);if(2===c&&g&&!f)return Y.call(this,l[0],l[1],b,d);if(1<c)if(g){var r=l[0];a=1}else 9<h&&3<h/m&&l.sort(aa);k||0===k||(k=this.resolution);for(let t,p;a<c;a++){p=l[a];r?(t=Z(this,p,r),t=Fa(t,e,f,this.P),f&&!1===t&&e.length||(r=p)):(t=Z(this,p,""),t=Fa(t,e,f,k));if(t)return t;if(f&&a===c-1){g=e.length;if(!g){if(r){r="";a=-1;continue}return e}if(1===g)return Ea(e[0],b,d)}}a:{r=f;c=e.length;
+f=[];g=D();for(let t=0,p,n,u,v;t<k;t++)for(a=0;a<c;a++)if(u=e[a],t<u.length&&(p=u[t]))for(h=0;h<p.length;h++)n=p[h],(l=g[n])?g[n]++:(l=0,g[n]=1),v=f[l]||(f[l]=[]),v.push(n);if(k=f.length)if(r){if(1<f.length)b:for(k=[],e=D(),r=f.length,l=r-1;0<=l;l--)for(r=f[l],g=r.length,a=0;a<g;a++){if(c=r[a],!e[c])if(e[c]=1,d)d--;else if(k.push(c),k.length===b)break b}else k=(f=f[0]).length>b||d?f.slice(d,b+d):f;f=k}else{if(k<c){e=[];break a}f=f[k-1];if(b||d)if(f.length>b||d)f=f.slice(d,b+d)}e=f}return e};
+function Y(a,b,c,e){return(a=Z(this,a,b))&&a.length?Ea(a,c,e):[]}function Fa(a,b,c,e){let d=[];if(a){e=Math.min(a.length,e);for(let g=0,f;g<e;g++)(f=a[g])&&f&&(d[g]=f);if(d.length){b.push(d);return}}return!c&&d}function Z(a,b,c){let e;c&&(e=a.bidirectional&&b>c);a=c?(a=a.ctx.get(e?b:c))&&a.get(e?c:b):a.map.get(b);return a};V.prototype.remove=function(a,b){const c=this.reg.size&&(this.fastupdate?this.reg.get(a):this.reg.has(a));if(c){if(this.fastupdate)for(let e=0,d;e<c.length;e++){if(d=c[e])if(2>d.length)d.pop();else{const g=d.indexOf(a);g===c.length-1?d.pop():d.splice(g,1)}}else Ga(this.map,a),this.depth&&Ga(this.ctx,a);b||this.reg.delete(a)}this.cache&&this.cache.remove(a);return this};
+function Ga(a,b){let c=0;if(a.constructor===Array)for(let e=0,d,g;e<a.length;e++){if((d=a[e])&&d.length)if(g=d.indexOf(b),0<=g){1<d.length?(d.splice(g,1),c++):delete a[e];break}else c++}else for(let e of a){const d=e[0],g=Ga(e[1],b);g?c+=g:a.delete(d)}return c};function V(a,b){if(!this||this.constructor!==V)return new V(a);if(a){var c=E(a)?a:a.preset;c&&(a=Object.assign({},Da[c],a))}else a={};c=a.context;const e=!0===c?{depth:1}:c||{},d=E(a.encoder)?Ca[a.encoder]:a.encode||a.encoder||ua;this.encoder=d.encode?d:"object"===typeof d?new L(d):{encode:d};this.resolution=a.resolution||9;this.tokenize=c=a.tokenize||"strict";this.depth="strict"===c&&e.depth||0;this.bidirectional=!1!==e.bidirectional;this.fastupdate=!!a.fastupdate;this.score=a.score||null;c=!1;this.map=
+new Map;this.ctx=new Map;this.reg=b||(this.fastupdate?new Map:new Set);this.P=e.resolution||3;this.rtl=d.rtl||a.rtl||!1;this.cache=(c=a.cache||null)&&new U(c)}w=V.prototype;w.clear=function(){this.map.clear();this.ctx.clear();this.reg.clear();this.cache&&this.cache.clear();return this};w.append=function(a,b){return this.add(a,b,!0)};w.contain=function(a){return this.reg.has(a)};w.update=function(a,b){const c=this,e=this.remove(a);return e&&e.then?e.then(()=>c.add(a,b)):this.add(a,b)};
+function Ha(a){let b=0;if(a.constructor===Array)for(let c=0,e;c<a.length;c++)(e=a[c])&&(b+=e.length);else for(const c of a){const e=c[0],d=Ha(c[1]);d?b+=d:a.delete(e)}return b}w.cleanup=function(){if(!this.fastupdate)return this;Ha(this.map);this.depth&&Ha(this.ctx);return this};w.searchCache=ta;
+w.export=function(a,b,c,e=0){let d,g;switch(e){case 0:d="reg";g=la(this.reg);break;case 1:d="cfg";g={};break;case 2:d="map";g=O(this.map,this.reg.size);break;case 3:d="ctx";g=ja(this.ctx,this.reg.size);break;default:return}return Q.call(this,a,b,d,g,c,e)};
+w.import=function(a,b){if(b)switch(E(b)&&(b=JSON.parse(b)),a=a.split("."),"json"===a[a.length-1]&&a.pop(),a=1<a.length?a[1]:a[0],a){case "reg":this.fastupdate=!1;this.reg=ma(b,this.reg);break;case "map":this.map=P(b,this.map);break;case "ctx":this.ctx=ka(b,this.ctx)}};
+w.serialize=function(a=!0){if(!this.reg.size)return"";let b="",c="";for(var e of this.reg.keys())c||(c=typeof e),b+=(b?",":"")+("string"===c?'"'+e+'"':e);b="index.reg=new Set(["+b+"]);";e="";for(var d of this.map.entries()){var g=d[0],f=d[1],h="";for(let m=0,r;m<f.length;m++){r=f[m]||[""];var k="";for(var l=0;l<r.length;l++)k+=(k?",":"")+("string"===c?'"'+r[l]+'"':r[l]);k="["+k+"]";h+=(h?",":"")+k}h='["'+g+'",['+h+"]]";e+=(e?",":"")+h}e="index.map=new Map(["+e+"]);";d="";for(const m of this.ctx.entries()){g=
+m[0];f=m[1];for(const r of f.entries()){f=r[0];h=r[1];k="";for(let t=0,p;t<h.length;t++){p=h[t]||[""];l="";for(let n=0;n<p.length;n++)l+=(l?",":"")+("string"===c?'"'+p[n]+'"':p[n]);l="["+l+"]";k+=(k?",":"")+l}k='new Map([["'+f+'",['+k+"]]])";k='["'+g+'",'+k+"]";d+=(d?",":"")+k}}d="index.ctx=new Map(["+d+"]);";return a?"function inject(index){"+b+e+d+"}":b+e+d};ia(V.prototype);export default {Index:V,Charset:Ca,Encoder:L,Document:R,Worker:null,Resolver:null,IndexedDB:null,Language:{}};
+export const Index=V;export const Charset=Ca;export const Encoder=L;export const Document=R;export const Worker=null;export const Resolver=null;export const IndexedDB=null;export const Language={};
\ No newline at end of file
diff --git a/dist/flexsearch.es5.debug.js b/dist/flexsearch.es5.debug.js
index 3d4e282..3521c27 100644
--- a/dist/flexsearch.es5.debug.js
+++ b/dist/flexsearch.es5.debug.js
@@ -6,14 +6,14 @@
  * https://github.com/nextapps-de/flexsearch
  */
 (function _f(self){'use strict';if(typeof module!=='undefined')self=module;else if(typeof process !== 'undefined')self=process;self._factory=_f;
-var v;
+var t;
 function aa(a) {
   var b = 0;
   return function() {
     return b < a.length ? {done:!1, value:a[b++]} : {done:!0};
   };
 }
-function y(a) {
+function x(a) {
   var b = "undefined" != typeof Symbol && Symbol.iterator && a[Symbol.iterator];
   if (b) {
     return b.call(a);
@@ -87,7 +87,7 @@ var ia = da;
 function ja() {
   this.C = !1;
   this.A = null;
-  this.F = void 0;
+  this.D = void 0;
   this.h = 1;
   this.L = 0;
   this.B = null;
@@ -99,7 +99,7 @@ function ka(a) {
   a.C = !0;
 }
 ja.prototype.G = function(a) {
-  this.F = a;
+  this.D = a;
 };
 function la(a, b) {
   a.B = {ma:b, na:!0};
@@ -109,7 +109,7 @@ ja.prototype.return = function(a) {
   this.B = {return:a};
   this.h = this.L;
 };
-function G(a, b, c) {
+function F(a, b, c) {
   a.h = c;
   return {value:b};
 }
@@ -153,7 +153,7 @@ function pa(a) {
         return a.h.C = !1, {value:b.value, done:!1};
       }
     } catch (c) {
-      a.h.F = void 0, la(a.h, c);
+      a.h.D = void 0, la(a.h, c);
     }
   }
   a.h.C = !1;
@@ -276,7 +276,7 @@ E("Promise", function(a) {
       this.h = [];
       var h = this;
       this.B(function() {
-        h.F();
+        h.D();
       });
     }
     this.h.push(f);
@@ -285,7 +285,7 @@ E("Promise", function(a) {
   c.prototype.B = function(f) {
     e(f, 0);
   };
-  c.prototype.F = function() {
+  c.prototype.D = function() {
     for (; this.h && this.h.length;) {
       var f = this.h;
       this.h = [];
@@ -313,11 +313,11 @@ E("Promise", function(a) {
       };
     }
     var h = this, k = !1;
-    return {resolve:f(this.ha), reject:f(this.F)};
+    return {resolve:f(this.ha), reject:f(this.D)};
   };
   b.prototype.ha = function(f) {
     if (f === this) {
-      this.F(new TypeError("A Promise cannot resolve to itself"));
+      this.D(new TypeError("A Promise cannot resolve to itself"));
     } else {
       if (f instanceof b) {
         this.ja(f);
@@ -343,12 +343,12 @@ E("Promise", function(a) {
     try {
       h = f.then;
     } catch (k) {
-      this.F(k);
+      this.D(k);
       return;
     }
     "function" == typeof h ? this.ka(h, f) : this.G(f);
   };
-  b.prototype.F = function(f) {
+  b.prototype.D = function(f) {
     this.ca(2, f);
   };
   b.prototype.G = function(f) {
@@ -411,8 +411,8 @@ E("Promise", function(a) {
       return "function" == typeof p ? function(r) {
         try {
           l(p(r));
-        } catch (u) {
-          m(u);
+        } catch (v) {
+          m(v);
         }
       } : q;
     }
@@ -451,17 +451,17 @@ E("Promise", function(a) {
   };
   b.race = function(f) {
     return new b(function(h, k) {
-      for (var l = y(f), m = l.next(); !m.done; m = l.next()) {
+      for (var l = x(f), m = l.next(); !m.done; m = l.next()) {
         d(m.value).V(h, k);
       }
     });
   };
   b.all = function(f) {
-    var h = y(f), k = h.next();
+    var h = x(f), k = h.next();
     return k.done ? d([]) : new b(function(l, m) {
       function n(r) {
-        return function(u) {
-          p[r] = u;
+        return function(v) {
+          p[r] = v;
           q--;
           0 == q && l(p);
         };
@@ -496,14 +496,14 @@ E("Array.prototype.values", function(a) {
     });
   };
 });
-function H(a, b) {
+function I(a, b) {
   return Object.prototype.hasOwnProperty.call(a, b);
 }
 E("WeakMap", function(a) {
   function b(k) {
     this.h = (h += Math.random() + 1).toString();
     if (k) {
-      k = y(k);
+      k = x(k);
       for (var l; !(l = k.next()).done;) {
         l = l.value, this.set(l[0], l[1]);
       }
@@ -516,7 +516,7 @@ E("WeakMap", function(a) {
     return "object" === l && null !== k || "function" === l;
   }
   function e(k) {
-    if (!H(k, f)) {
+    if (!I(k, f)) {
       var l = new c();
       ba(k, f, {value:l});
     }
@@ -559,20 +559,20 @@ E("WeakMap", function(a) {
       throw Error("Invalid WeakMap key");
     }
     e(k);
-    if (!H(k, f)) {
+    if (!I(k, f)) {
       throw Error("WeakMap key fail: " + k);
     }
     k[f][this.h] = l;
     return this;
   };
   b.prototype.get = function(k) {
-    return d(k) && H(k, f) ? k[f][this.h] : void 0;
+    return d(k) && I(k, f) ? k[f][this.h] : void 0;
   };
   b.prototype.has = function(k) {
-    return d(k) && H(k, f) && H(k[f], this.h);
+    return d(k) && I(k, f) && I(k[f], this.h);
   };
   b.prototype.delete = function(k) {
-    return d(k) && H(k, f) && H(k[f], this.h) ? delete k[f][this.h] : !1;
+    return d(k) && I(k, f) && I(k[f], this.h) ? delete k[f][this.h] : !1;
   };
   return b;
 });
@@ -600,22 +600,22 @@ E("Map", function(a) {
     var l = k && typeof k;
     "object" == l || "function" == l ? g.has(k) ? l = g.get(k) : (l = "" + ++f, g.set(k, l)) : l = "p_" + k;
     var m = h[0][l];
-    if (m && H(h[0], l)) {
+    if (m && I(h[0], l)) {
       for (h = 0; h < m.length; h++) {
         var n = m[h];
         if (k !== k && n.key !== n.key || k === n.key) {
-          return {id:l, list:m, index:h, D:n};
+          return {id:l, list:m, index:h, F:n};
         }
       }
     }
-    return {id:l, list:m, index:-1, D:void 0};
+    return {id:l, list:m, index:-1, F:void 0};
   }
   function e(h) {
     this[0] = {};
     this[1] = b();
     this.size = 0;
     if (h) {
-      h = y(h);
+      h = x(h);
       for (var k; !(k = h.next()).done;) {
         k = k.value, this.set(k[0], k[1]);
       }
@@ -626,7 +626,7 @@ E("Map", function(a) {
       return !1;
     }
     try {
-      var h = Object.seal({x:4}), k = new a(y([[h, "s"]]));
+      var h = Object.seal({x:4}), k = new a(x([[h, "s"]]));
       if ("s" != k.get(h) || 1 != k.size || k.get({x:4}) || k.set({x:4}, "t") != k || 2 != k.size) {
         return !1;
       }
@@ -647,12 +647,12 @@ E("Map", function(a) {
     h = 0 === h ? 0 : h;
     var l = d(this, h);
     l.list || (l.list = this[0][l.id] = []);
-    l.D ? l.D.value = k : (l.D = {next:this[1], K:this[1].K, head:this[1], key:h, value:k}, l.list.push(l.D), this[1].K.next = l.D, this[1].K = l.D, this.size++);
+    l.F ? l.F.value = k : (l.F = {next:this[1], K:this[1].K, head:this[1], key:h, value:k}, l.list.push(l.F), this[1].K.next = l.F, this[1].K = l.F, this.size++);
     return this;
   };
   e.prototype.delete = function(h) {
     h = d(this, h);
-    return h.D && h.list ? (h.list.splice(h.index, 1), h.list.length || delete this[0][h.id], h.D.K.next = h.D.next, h.D.next.K = h.D.K, h.D.head = null, this.size--, !0) : !1;
+    return h.F && h.list ? (h.list.splice(h.index, 1), h.list.length || delete this[0][h.id], h.F.K.next = h.F.next, h.F.next.K = h.F.K, h.F.head = null, this.size--, !0) : !1;
   };
   e.prototype.clear = function() {
     this[0] = {};
@@ -660,10 +660,10 @@ E("Map", function(a) {
     this.size = 0;
   };
   e.prototype.has = function(h) {
-    return !!d(this, h).D;
+    return !!d(this, h).F;
   };
   e.prototype.get = function(h) {
-    return (h = d(this, h).D) && h.value;
+    return (h = d(this, h).F) && h.value;
   };
   e.prototype.entries = function() {
     return c(this, function(h) {
@@ -700,7 +700,7 @@ E("Set", function(a) {
   function b(c) {
     this.h = new Map();
     if (c) {
-      c = y(c);
+      c = x(c);
       for (var d; !(d = c.next()).done;) {
         this.add(d.value);
       }
@@ -712,7 +712,7 @@ E("Set", function(a) {
       return !1;
     }
     try {
-      var c = Object.seal({x:4}), d = new a(y([c]));
+      var c = Object.seal({x:4}), d = new a(x([c]));
       if (!d.has(c) || 1 != d.size || d.add(c) != d || 1 != d.size || d.add({x:4}) != d || 2 != d.size) {
         return !1;
       }
@@ -805,7 +805,7 @@ var wa = "function" == typeof Object.assign ? Object.assign : function(a, b) {
     var d = arguments[c];
     if (d) {
       for (var e in d) {
-        H(d, e) && (a[e] = d[e]);
+        I(d, e) && (a[e] = d[e]);
       }
     }
   }
@@ -824,7 +824,7 @@ E("Array.prototype.flat", function(a) {
     return c;
   };
 });
-function I(a, b, c) {
+function J(a, b, c) {
   var d = typeof c, e = typeof a;
   if ("undefined" !== d) {
     if ("undefined" !== e) {
@@ -841,7 +841,7 @@ function I(a, b, c) {
           }
           if (b === Map) {
             b = new Map(c);
-            d = y(a);
+            d = x(a);
             for (e = d.next(); !e.done; e = d.next()) {
               e = e.value, b.set(e[0], e[1]);
             }
@@ -849,7 +849,7 @@ function I(a, b, c) {
           }
           if (b === Set) {
             b = new Set(c);
-            d = y(a.values());
+            d = x(a.values());
             for (e = d.next(); !e.done; e = d.next()) {
               b.add(e.value);
             }
@@ -863,13 +863,13 @@ function I(a, b, c) {
   }
   return "undefined" === e ? b : a;
 }
-function J() {
+function K() {
   return Object.create(null);
 }
 function xa(a, b) {
   return b.length - a.length;
 }
-function K(a) {
+function L(a) {
   return "string" === typeof a;
 }
 function M(a) {
@@ -877,14 +877,14 @@ function M(a) {
 }
 function ya(a) {
   var b = [];
-  a = y(a.keys());
+  a = x(a.keys());
   for (var c = a.next(); !c.done; c = a.next()) {
     b.push(c.value);
   }
   return b;
 }
 function za(a, b) {
-  if (K(b)) {
+  if (L(b)) {
     a = a[b];
   } else {
     for (var c = 0; a && c < b.length; c++) {
@@ -907,27 +907,28 @@ function Aa(a) {
 ["\u02b2", "j"], ["\u02b3", "r"], ["\u02b4", "\u0279"], ["\u02b5", "\u027b"], ["\u02b6", "\u0281"], ["\u02b7", "w"], ["\u02b8", "y"], ["\u02e0", "\u0263"], ["\u02e1", "l"], ["\u02e2", "s"], ["\u02e3", "x"], ["\u02e4", "\u0295"], ["\u0390", "\u03b9"], ["\u03ac", "\u03b1"], ["\u03ad", "\u03b5"], ["\u03ae", "\u03b7"], ["\u03af", "\u03b9"], ["\u03b0", "\u03c5"], ["\u03ca", "\u03b9"], ["\u03cb", "\u03c5"], ["\u03cc", "\u03bf"], ["\u03cd", "\u03c5"], ["\u03ce", "\u03c9"], ["\u03d0", "\u03b2"], ["\u03d1", 
 "\u03b8"], ["\u03d2", "\u03a5"], ["\u03d3", "\u03a5"], ["\u03d4", "\u03a5"], ["\u03d5", "\u03c6"], ["\u03d6", "\u03c0"], ["\u03f0", "\u03ba"], ["\u03f1", "\u03c1"], ["\u03f2", "\u03c2"], ["\u03f5", "\u03b5"], ["\u0439", "\u0438"], ["\u0450", "\u0435"], ["\u0451", "\u0435"], ["\u0453", "\u0433"], ["\u0457", "\u0456"], ["\u045c", "\u043a"], ["\u045d", "\u0438"], ["\u045e", "\u0443"], ["\u0477", "\u0475"], ["\u04c2", "\u0436"], ["\u04d1", "\u0430"], ["\u04d3", "\u0430"], ["\u04d7", "\u0435"], ["\u04db", 
 "\u04d9"], ["\u04dd", "\u0436"], ["\u04df", "\u0437"], ["\u04e3", "\u0438"], ["\u04e5", "\u0438"], ["\u04e7", "\u043e"], ["\u04eb", "\u04e9"], ["\u04ed", "\u044d"], ["\u04ef", "\u0443"], ["\u04f1", "\u0443"], ["\u04f3", "\u0443"], ["\u04f5", "\u0447"]];
-var Ca = /[^\p{L}\p{N}]+/u, Da = /(\d{3})/g, Ea = /(\D)(\d{3})/g, Fa = /(\d{3})(\D)/g, Ha = "".normalize && /[\u0300-\u036f]/g;
-function N(a) {
-  if (!this || this.constructor !== N) {
+var Ca = /[^\p{L}\p{N}]+/u, Da = /(\d{3})/g, Ea = /(\D)(\d{3})/g, Fa = /(\d{3})(\D)/g, Ga = "".normalize && /[\u0300-\u036f]/g;
+function Ha(a) {
+  if (!this || this.constructor !== Ha) {
     var b = Function.prototype.bind, c = b.apply, d = [null], e = d.concat;
     if (arguments instanceof Array) {
       var g = arguments;
     } else {
-      g = y(arguments);
+      g = x(arguments);
       for (var f, h = []; !(f = g.next()).done;) {
         h.push(f.value);
       }
       g = h;
     }
-    return new (c.call(b, N, e.call(d, g)))();
+    return new (c.call(b, Ha, e.call(d, g)))();
   }
   for (b = 0; b < arguments.length; b++) {
     this.assign(arguments[b]);
   }
 }
-N.prototype.assign = function(a) {
-  this.normalize = I(a.normalize, !0, this.normalize);
+t = Ha.prototype;
+t.assign = function(a) {
+  this.normalize = J(a.normalize, !0, this.normalize);
   var b = a.include, c = b || a.exclude || a.split;
   if ("object" === typeof c) {
     var d = !b, e = "";
@@ -948,55 +949,106 @@ N.prototype.assign = function(a) {
     this.numeric = d;
   } else {
     try {
-      this.split = I(c, Ca, this.split);
+      this.split = J(c, Ca, this.split);
     } catch (g) {
       this.split = /\s+/;
     }
-    this.numeric = I(this.numeric, !0);
+    this.numeric = J(this.numeric, !0);
   }
-  this.prepare = I(a.prepare, null, this.prepare);
-  this.finalize = I(a.finalize, null, this.finalize);
-  Ha || (this.mapper = new Map(Ba));
+  this.prepare = J(a.prepare, null, this.prepare);
+  this.finalize = J(a.finalize, null, this.finalize);
+  Ga || (this.mapper = new Map(Ba));
   this.rtl = a.rtl || !1;
-  this.dedupe = I(a.dedupe, !0, this.dedupe);
-  this.filter = I((c = a.filter) && new Set(c), null, this.filter);
-  this.matcher = I((c = a.matcher) && new Map(c), null, this.matcher);
-  this.mapper = I((c = a.mapper) && new Map(c), null, this.mapper);
-  this.stemmer = I((c = a.stemmer) && new Map(c), null, this.stemmer);
-  this.replacer = I(a.replacer, null, this.replacer);
-  this.minlength = I(a.minlength, 1, this.minlength);
-  this.maxlength = I(a.maxlength, 0, this.maxlength);
-  if (this.cache = c = I(a.cache, !0, this.cache)) {
-    this.U = null, this.L = "number" === typeof c ? c : 2e5, this.N = new Map(), this.S = new Map(), this.A = this.h = 128;
+  this.dedupe = J(a.dedupe, !0, this.dedupe);
+  this.filter = J((c = a.filter) && new Set(c), null, this.filter);
+  this.matcher = J((c = a.matcher) && new Map(c), null, this.matcher);
+  this.mapper = J((c = a.mapper) && new Map(c), null, this.mapper);
+  this.stemmer = J((c = a.stemmer) && new Map(c), null, this.stemmer);
+  this.replacer = J(a.replacer, null, this.replacer);
+  this.minlength = J(a.minlength, 1, this.minlength);
+  this.maxlength = J(a.maxlength, 0, this.maxlength);
+  if (this.cache = c = J(a.cache, !0, this.cache)) {
+    this.U = null, this.L = "number" === typeof c ? c : 2e5, this.N = new Map(), this.O = new Map(), this.C = this.B = 128;
   }
-  this.B = "";
-  this.F = null;
-  this.C = "";
+  this.h = "";
+  this.D = null;
+  this.A = "";
   this.G = null;
   if (this.matcher) {
-    for (a = y(this.matcher.keys()), b = a.next(); !b.done; b = a.next()) {
-      this.B += (this.B ? "|" : "") + b.value;
+    for (a = x(this.matcher.keys()), b = a.next(); !b.done; b = a.next()) {
+      this.h += (this.h ? "|" : "") + b.value;
     }
   }
   if (this.stemmer) {
-    for (a = y(this.stemmer.keys()), b = a.next(); !b.done; b = a.next()) {
-      this.C += (this.C ? "|" : "") + b.value;
+    for (a = x(this.stemmer.keys()), b = a.next(); !b.done; b = a.next()) {
+      this.A += (this.A ? "|" : "") + b.value;
     }
   }
   return this;
 };
-N.prototype.encode = function(a) {
+t.addMatcher = function(a, b) {
+  if ("object" === typeof a) {
+    return this.addReplacer(a, b);
+  }
+  if (2 > a.length) {
+    return this.addMapper(a, b);
+  }
+  this.matcher || (this.matcher = new Map());
+  this.matcher.set(a, b);
+  this.h += (this.h ? "|" : "") + a;
+  this.D = null;
+  this.cache && Ja(this);
+  return this;
+};
+t.addStemmer = function(a, b) {
+  this.stemmer || (this.stemmer = new Map());
+  this.stemmer.set(a, b);
+  this.A += (this.A ? "|" : "") + a;
+  this.G = null;
+  this.cache && Ja(this);
+  return this;
+};
+t.addFilter = function(a) {
+  this.filter || (this.filter = new Set());
+  this.filter.add(a);
+  this.cache && Ja(this);
+  return this;
+};
+t.addMapper = function(a, b) {
+  if ("object" === typeof a) {
+    return this.addReplacer(a, b);
+  }
+  if (1 < a.length) {
+    return this.addMatcher(a, b);
+  }
+  this.mapper || (this.mapper = new Map());
+  this.mapper.set(a, b);
+  this.cache && Ja(this);
+  return this;
+};
+t.addReplacer = function(a, b) {
+  "string" === typeof a && (a = new RegExp(a, "g"));
+  this.replacer || (this.replacer = []);
+  this.replacer.push(a, b || "");
+  this.cache && Ja(this);
+  return this;
+};
+function Ja(a) {
+  a.N.clear();
+  a.O.clear();
+}
+t.encode = function(a) {
   var b = this;
-  if (this.cache && a.length <= this.h) {
+  if (this.cache && a.length <= this.B) {
     if (this.U) {
       if (this.N.has(a)) {
         return this.N.get(a);
       }
     } else {
-      this.U = setTimeout(Ia, 50, this);
+      this.U = setTimeout(Ka, 50, this);
     }
   }
-  this.normalize && (a = "function" === typeof this.normalize ? this.normalize(a) : Ha ? a.normalize("NFKD").replace(Ha, "").toLowerCase() : a.toLowerCase());
+  this.normalize && (a = "function" === typeof this.normalize ? this.normalize(a) : Ga ? a.normalize("NFKD").replace(Ga, "").toLowerCase() : a.toLowerCase());
   this.prepare && (a = this.prepare(a));
   this.numeric && 3 < a.length && (a = a.replace(Ea, "$1 $2").replace(Fa, "$1 $2").replace(Da, "$1 "));
   for (var c = !(this.dedupe || this.mapper || this.filter || this.matcher || this.stemmer || this.replacer), d = [], e = this.split || "" === this.split ? a.split(this.split) : a, g = 0, f = void 0, h = void 0; g < e.length; g++) {
@@ -1005,19 +1057,19 @@ N.prototype.encode = function(a) {
         d.push(f);
       } else {
         if (!this.filter || !this.filter.has(f)) {
-          if (this.cache && f.length <= this.A) {
+          if (this.cache && f.length <= this.C) {
             if (this.U) {
-              var k = this.S.get(f);
+              var k = this.O.get(f);
               if (k || "" === k) {
                 k && d.push(k);
                 continue;
               }
             } else {
-              this.U = setTimeout(Ia, 50, this);
+              this.U = setTimeout(Ka, 50, this);
             }
           }
           k = void 0;
-          this.stemmer && 2 < f.length && (this.G || (this.G = new RegExp("(?!^)(" + this.C + ")$")), f = f.replace(this.G, function(q) {
+          this.stemmer && 2 < f.length && (this.G || (this.G = new RegExp("(?!^)(" + this.A + ")$")), f = f.replace(this.G, function(q) {
             return b.stemmer.get(q);
           }), k = 1);
           f && k && (f.length < this.minlength || this.filter && this.filter.has(f)) && (f = "");
@@ -1028,7 +1080,7 @@ N.prototype.encode = function(a) {
             }
             f = k;
           }
-          this.matcher && 1 < f.length && (this.F || (this.F = new RegExp("(" + this.B + ")", "g")), f = f.replace(this.F, function(q) {
+          this.matcher && 1 < f.length && (this.D || (this.D = new RegExp("(" + this.h + ")", "g")), f = f.replace(this.D, function(q) {
             return b.matcher.get(q);
           }));
           if (f && this.replacer) {
@@ -1036,24 +1088,24 @@ N.prototype.encode = function(a) {
               f = f.replace(this.replacer[k], this.replacer[k + 1]);
             }
           }
-          this.cache && h.length <= this.A && (this.S.set(h, f), this.S.size > this.L && (this.S.clear(), this.A = this.A / 1.1 | 0));
+          this.cache && h.length <= this.C && (this.O.set(h, f), this.O.size > this.L && (this.O.clear(), this.C = this.C / 1.1 | 0));
           f && d.push(f);
         }
       }
     }
   }
   this.finalize && (d = this.finalize(d) || d);
-  this.cache && a.length <= this.h && (this.N.set(a, d), this.N.size > this.L && (this.N.clear(), this.h = this.h / 1.1 | 0));
+  this.cache && a.length <= this.B && (this.N.set(a, d), this.N.size > this.L && (this.N.clear(), this.B = this.B / 1.1 | 0));
   return d;
 };
-function Ia(a) {
+function Ka(a) {
   a.U = null;
   a.N.clear();
-  a.S.clear();
+  a.O.clear();
 }
-;function Ja(a) {
-  var b, c, d, e, g, f, h, k;
-  return ta(function(l) {
+;function La(a) {
+  var b, c, d, e, g, f, h;
+  return ta(function(k) {
     a = a.data;
     b = self._index;
     c = a.args;
@@ -1061,18 +1113,17 @@ function Ia(a) {
     switch(d) {
       case "init":
         e = a.options || {};
-        (g = e.config) && (e = g);
-        (f = a.factory) ? (Function("return " + f)()(self), self._index = new self.FlexSearch.Index(e), delete self.FlexSearch) : self._index = new O(e);
+        (g = a.factory) ? (Function("return " + g)()(self), self._index = new self.FlexSearch.Index(e), delete self.FlexSearch) : self._index = new N(e);
         postMessage({id:a.id});
         break;
       default:
-        h = a.id, k = b[d].apply(b, c), postMessage("search" === d ? {id:h, msg:k} : {id:h});
+        f = a.id, h = b[d].apply(b, c), postMessage("search" === d ? {id:f, msg:h} : {id:f});
     }
-    l.h = 0;
+    k.h = 0;
   });
 }
-;var Ka = 0;
-function R(a) {
+;var Ma = 0;
+function O(a) {
   function b(f) {
     function h(k) {
       k = k.data || k;
@@ -1080,15 +1131,15 @@ function R(a) {
       m && (m(k.msg), delete e.h[l]);
     }
     this.worker = f;
-    this.h = J();
+    this.h = K();
     if (this.worker) {
       d ? this.worker.on("message", h) : this.worker.onmessage = h;
       if (a.config) {
         return new Promise(function(k) {
-          e.h[++Ka] = function() {
+          e.h[++Ma] = function() {
             k(e);
           };
-          e.worker.postMessage({id:Ka, task:"init", factory:c, options:a});
+          e.worker.postMessage({id:Ma, task:"init", factory:c, options:a});
         });
       }
       this.worker.postMessage({task:"init", factory:c, options:a});
@@ -1096,23 +1147,23 @@ function R(a) {
     }
   }
   a = void 0 === a ? {} : a;
-  if (!this || this.constructor !== R) {
-    return new R(a);
+  if (!this || this.constructor !== O) {
+    return new O(a);
   }
   var c = "undefined" !== typeof self ? self._factory : "undefined" !== typeof window ? window._factory : null;
   c && (c = c.toString());
-  var d = "undefined" === typeof window, e = this, g = La(c, d, a.worker);
+  var d = "undefined" === typeof window, e = this, g = Na(c, d, a.worker);
   return g.then ? g.then(function(f) {
     return b.call(e, f);
   }) : b.call(this, g);
 }
-Ma("add");
-Ma("append");
-Ma("search");
-Ma("update");
-Ma("remove");
-function Ma(a) {
-  R.prototype[a] = R.prototype[a + "Async"] = function() {
+Oa("add");
+Oa("append");
+Oa("search");
+Oa("update");
+Oa("remove");
+function Oa(a) {
+  O.prototype[a] = O.prototype[a + "Async"] = function() {
     var b = this, c = arguments, d, e, g, f, h;
     return ta(function(k) {
       d = b;
@@ -1120,25 +1171,25 @@ function Ma(a) {
       g = e[e.length - 1];
       "function" === typeof g && (f = g, e.splice(e.length - 1, 1));
       h = new Promise(function(l) {
-        d.h[++Ka] = l;
-        d.worker.postMessage({task:a, id:Ka, args:e});
+        d.h[++Ma] = l;
+        d.worker.postMessage({task:a, id:Ma, args:e});
       });
       return f ? (h.then(f), k.return(b)) : k.return(h);
     });
   };
 }
-function La(a, b, c) {
-  return b ? "undefined" !== typeof module ? new (require("worker_threads")["Worker"])(__dirname + "/node/node.js") : import("worker_threads").then(function(worker){ return new worker["Worker"]((1,eval)("import.meta.dirname") + "/node/node.mjs"); }) : a ? new window.Worker(URL.createObjectURL(new Blob(["onmessage=" + Ja.toString()], {type:"text/javascript"}))) : new window.Worker(K(c) ? c : (0,eval)("import.meta.url").replace("/worker.js", "/worker/worker.js").replace("flexsearch.bundle.module.min.js", 
+function Na(a, b, c) {
+  return b ? "undefined" !== typeof module ? new (require("worker_threads")["Worker"])(__dirname + "/node/node.js") : import("worker_threads").then(function(worker){ return new worker["Worker"]((1,eval)("import.meta.dirname") + "/node/node.mjs"); }) : a ? new window.Worker(URL.createObjectURL(new Blob(["onmessage=" + La.toString()], {type:"text/javascript"}))) : new window.Worker(L(c) ? c : (0,eval)("import.meta.url").replace("/worker.js", "/worker/worker.js").replace("flexsearch.bundle.module.min.js", 
   "module/worker/worker.js"), {type:"module"});
 }
-;function Na(a) {
-  Oa.call(a, "add");
-  Oa.call(a, "append");
-  Oa.call(a, "search");
-  Oa.call(a, "update");
-  Oa.call(a, "remove");
+;function Pa(a) {
+  Qa.call(a, "add");
+  Qa.call(a, "append");
+  Qa.call(a, "search");
+  Qa.call(a, "update");
+  Qa.call(a, "remove");
 }
-function Oa(a) {
+function Qa(a) {
   this[a + "Async"] = function() {
     var b = arguments, c = b[b.length - 1];
     if ("function" === typeof c) {
@@ -1150,59 +1201,59 @@ function Oa(a) {
     return b;
   };
 }
-;function Pa(a, b) {
+;function Ra(a, b) {
   b = void 0 === b ? 0 : b;
   var c = [], d = [];
   b && (b = 250000 / b * 5000 | 0);
-  a = y(a.entries());
+  a = x(a.entries());
   for (var e = a.next(); !e.done; e = a.next()) {
     d.push(e.value), d.length === b && (c.push(d), d = []);
   }
   d.length && c.push(d);
   return c;
 }
-function Qa(a, b) {
+function Sa(a, b) {
   b || (b = new Map());
   for (var c = 0, d; c < a.length; c++) {
     d = a[c], b.set(d[0], d[1]);
   }
   return b;
 }
-function Ra(a, b) {
+function Ta(a, b) {
   b = void 0 === b ? 0 : b;
   var c = [], d = [];
   b && (b = 250000 / b * 1000 | 0);
-  a = y(a.entries());
+  a = x(a.entries());
   for (var e = a.next(); !e.done; e = a.next()) {
-    e = e.value, d.push([e[0], Pa(e[1])[0]]), d.length === b && (c.push(d), d = []);
+    e = e.value, d.push([e[0], Ra(e[1])[0]]), d.length === b && (c.push(d), d = []);
   }
   d.length && c.push(d);
   return c;
 }
-function Sa(a, b) {
+function Ua(a, b) {
   b || (b = new Map());
   for (var c = 0, d, e; c < a.length; c++) {
-    d = a[c], e = b.get(d[0]), b.set(d[0], Qa(d[1], e));
+    d = a[c], e = b.get(d[0]), b.set(d[0], Sa(d[1], e));
   }
   return b;
 }
-function Ta(a) {
+function Va(a) {
   var b = [], c = [];
-  a = y(a.keys());
+  a = x(a.keys());
   for (var d = a.next(); !d.done; d = a.next()) {
     c.push(d.value), 250000 === c.length && (b.push(c), c = []);
   }
   c.length && b.push(c);
   return b;
 }
-function Ua(a, b) {
+function Wa(a, b) {
   b || (b = new Set());
   for (var c = 0; c < a.length; c++) {
     b.add(a[c]);
   }
   return b;
 }
-function Va(a, b, c, d, e, g, f) {
+function Xa(a, b, c, d, e, g, f) {
   f = void 0 === f ? 0 : f;
   var h = d && d.constructor === Array, k = h ? d.shift() : d;
   if (!k) {
@@ -1211,12 +1262,12 @@ function Va(a, b, c, d, e, g, f) {
   if ((k = a((b ? b + "." : "") + (f + 1) + "." + c, JSON.stringify(k))) && k.then) {
     var l = this;
     return k.then(function() {
-      return Va.call(l, a, b, c, h ? d : null, e, g, f + 1);
+      return Xa.call(l, a, b, c, h ? d : null, e, g, f + 1);
     });
   }
-  return Va.call(this, a, b, c, h ? d : null, e, g, f + 1);
+  return Xa.call(this, a, b, c, h ? d : null, e, g, f + 1);
 }
-;function Wa(a, b, c, d) {
+;function Ya(a, b, c, d) {
   for (var e = [], g = 0, f; g < a.index.length; g++) {
     if (f = a.index[g], b >= f.length) {
       b -= f.length;
@@ -1281,12 +1332,12 @@ function S(a) {
     }
     if ("slice" === d) {
       return function(e, g) {
-        return Wa(b, e || 0, g || b.length, !1);
+        return Ya(b, e || 0, g || b.length, !1);
       };
     }
     if ("splice" === d) {
       return function(e, g) {
-        return Wa(b, e || 0, g || b.length, !0);
+        return Ya(b, e || 0, g || b.length, !0);
       };
     }
     if ("constructor" === d) {
@@ -1315,10 +1366,10 @@ function T(a) {
   if (!this) {
     return new T(a);
   }
-  this.index = J();
+  this.index = K();
   this.B = [];
   this.size = 0;
-  32 < a ? (this.h = Xa, this.A = BigInt(a)) : (this.h = Ya, this.A = a);
+  32 < a ? (this.h = Za, this.A = BigInt(a)) : (this.h = $a, this.A = a);
 }
 T.prototype.get = function(a) {
   var b = this.h(a);
@@ -1333,81 +1384,29 @@ function U(a) {
   if (!this) {
     return new U(a);
   }
-  this.index = J();
+  this.index = K();
   this.h = [];
-  32 < a ? (this.B = Xa, this.A = BigInt(a)) : (this.B = Ya, this.A = a);
+  32 < a ? (this.B = Za, this.A = BigInt(a)) : (this.B = $a, this.A = a);
 }
 U.prototype.add = function(a) {
   var b = this.B(a), c = this.index[b];
   c ? (b = c.size, c.add(a), (b -= c.size) && this.size++) : (this.index[b] = c = new Set([a]), this.h.push(c));
 };
-v = T.prototype;
-v.has = U.prototype.has = function(a) {
+t = T.prototype;
+t.has = U.prototype.has = function(a) {
   var b = this.B(a);
   return (b = this.index[b]) && b.has(a);
 };
-v.delete = U.prototype.delete = function(a) {
+t.delete = U.prototype.delete = function(a) {
   var b = this.B(a);
   (b = this.index[b]) && b.delete(a) && this.size--;
 };
-v.clear = U.prototype.clear = function() {
-  this.index = J();
+t.clear = U.prototype.clear = function() {
+  this.index = K();
   this.h = [];
   this.size = 0;
 };
-v.values = U.prototype.values = function Za() {
-  var b, c = this, d, e, g;
-  return ra(Za, function(f) {
-    switch(f.h) {
-      case 1:
-        b = 0;
-      case 2:
-        if (!(b < c.h.length)) {
-          f.h = 0;
-          break;
-        }
-        d = y(c.h[b].values());
-        e = d.next();
-      case 5:
-        if (e.done) {
-          b++;
-          f.h = 2;
-          break;
-        }
-        g = e.value;
-        return G(f, g, 6);
-      case 6:
-        e = d.next(), f.h = 5;
-    }
-  });
-};
-v.keys = U.prototype.keys = function $a() {
-  var b, c = this, d, e, g;
-  return ra($a, function(f) {
-    switch(f.h) {
-      case 1:
-        b = 0;
-      case 2:
-        if (!(b < c.h.length)) {
-          f.h = 0;
-          break;
-        }
-        d = y(c.h[b].keys());
-        e = d.next();
-      case 5:
-        if (e.done) {
-          b++;
-          f.h = 2;
-          break;
-        }
-        g = e.value;
-        return G(f, g, 6);
-      case 6:
-        e = d.next(), f.h = 5;
-    }
-  });
-};
-v.entries = U.prototype.entries = function ab() {
+t.values = U.prototype.values = function ab() {
   var b, c = this, d, e, g;
   return ra(ab, function(f) {
     switch(f.h) {
@@ -1418,7 +1417,7 @@ v.entries = U.prototype.entries = function ab() {
           f.h = 0;
           break;
         }
-        d = y(c.h[b].entries());
+        d = x(c.h[b].values());
         e = d.next();
       case 5:
         if (e.done) {
@@ -1427,13 +1426,65 @@ v.entries = U.prototype.entries = function ab() {
           break;
         }
         g = e.value;
-        return G(f, g, 6);
+        return F(f, g, 6);
       case 6:
         e = d.next(), f.h = 5;
     }
   });
 };
-function Ya(a) {
+t.keys = U.prototype.keys = function bb() {
+  var b, c = this, d, e, g;
+  return ra(bb, function(f) {
+    switch(f.h) {
+      case 1:
+        b = 0;
+      case 2:
+        if (!(b < c.h.length)) {
+          f.h = 0;
+          break;
+        }
+        d = x(c.h[b].keys());
+        e = d.next();
+      case 5:
+        if (e.done) {
+          b++;
+          f.h = 2;
+          break;
+        }
+        g = e.value;
+        return F(f, g, 6);
+      case 6:
+        e = d.next(), f.h = 5;
+    }
+  });
+};
+t.entries = U.prototype.entries = function cb() {
+  var b, c = this, d, e, g;
+  return ra(cb, function(f) {
+    switch(f.h) {
+      case 1:
+        b = 0;
+      case 2:
+        if (!(b < c.h.length)) {
+          f.h = 0;
+          break;
+        }
+        d = x(c.h[b].entries());
+        e = d.next();
+      case 5:
+        if (e.done) {
+          b++;
+          f.h = 2;
+          break;
+        }
+        g = e.value;
+        return F(f, g, 6);
+      case 6:
+        e = d.next(), f.h = 5;
+    }
+  });
+};
+function $a(a) {
   var b = Math.pow(2, this.A) - 1;
   if ("number" == typeof a) {
     return a & b;
@@ -1443,7 +1494,7 @@ function Ya(a) {
   }
   return 32 === this.A ? c + Math.pow(2, 31) : c;
 }
-function Xa() {
+function Za() {
   throw Error("The keystore is limited to 32 for EcmaScript5");
 }
 ;V.prototype.add = function(a, b, c) {
@@ -1458,9 +1509,9 @@ function Xa() {
       if ("function" === typeof e) {
         (e = e(b)) && g.add(a, e, !1, !0);
       } else {
-        var f = e.R;
+        var f = e.S;
         if (!f || f(b)) {
-          e.constructor === String ? e = ["" + e] : K(e) && (e = [e]), bb(b, e, this.T, 0, g, a, e[0], c);
+          e.constructor === String ? e = ["" + e] : L(e) && (e = [e]), db(b, e, this.T, 0, g, a, e[0], c);
         }
       }
     }
@@ -1469,13 +1520,13 @@ function Xa() {
         f = this.M[d];
         var h = this.$[d];
         g = this.tag.get(h);
-        e = J();
+        e = K();
         if ("function" === typeof f) {
           if (f = f(b), !f) {
             continue;
           }
         } else {
-          var k = f.R;
+          var k = f.S;
           if (k && !k(b)) {
             continue;
           }
@@ -1483,7 +1534,7 @@ function Xa() {
           f = za(b, f);
         }
         if (g && f) {
-          for (K(f) && (f = [f]), h = 0, k = void 0; h < f.length; h++) {
+          for (L(f) && (f = [f]), h = 0, k = void 0; h < f.length; h++) {
             var l = f[h];
             if (!e[l]) {
               e[l] = 1;
@@ -1493,7 +1544,7 @@ function Xa() {
                 if (k.length === Math.pow(2, 31) - 1) {
                   m = new S(k);
                   if (this.fastupdate) {
-                    for (var n = y(this.reg.values()), p = n.next(); !p.done; p = n.next()) {
+                    for (var n = x(this.reg.values()), p = n.next(); !p.done; p = n.next()) {
                       p = p.value, p.includes(k) && (p[p.indexOf(k)] = m);
                     }
                   }
@@ -1511,9 +1562,9 @@ function Xa() {
     }
     if (this.store && (!c || !this.store.has(a))) {
       if (this.H) {
-        var q = J();
+        var q = K();
         for (c = 0; c < this.H.length; c++) {
-          if (d = this.H[c], g = d.R, !g || g(b)) {
+          if (d = this.H[c], g = d.S, !g || g(b)) {
             g = void 0;
             if ("function" === typeof d) {
               g = d(b);
@@ -1521,11 +1572,11 @@ function Xa() {
                 continue;
               }
               d = [d.la];
-            } else if (K(d) || d.constructor === String) {
+            } else if (L(d) || d.constructor === String) {
               q[d] = b[d];
               continue;
             }
-            cb(b, q, d, 0, d[0], g);
+            eb(b, q, d, 0, d[0], g);
           }
         }
       }
@@ -1534,21 +1585,21 @@ function Xa() {
   }
   return this;
 };
-function cb(a, b, c, d, e, g) {
+function eb(a, b, c, d, e, g) {
   a = a[e];
   if (d === c.length - 1) {
     b[e] = g || a;
   } else if (a) {
     if (a.constructor === Array) {
       for (b = b[e] = Array(a.length), e = 0; e < a.length; e++) {
-        cb(a, b, c, d, e);
+        eb(a, b, c, d, e);
       }
     } else {
-      b = b[e] || (b[e] = J()), e = c[++d], cb(a, b, c, d, e);
+      b = b[e] || (b[e] = K()), e = c[++d], eb(a, b, c, d, e);
     }
   }
 }
-function bb(a, b, c, d, e, g, f, h) {
+function db(a, b, c, d, e, g, f, h) {
   if (a = a[f]) {
     if (d === b.length - 1) {
       if (a.constructor === Array) {
@@ -1564,29 +1615,29 @@ function bb(a, b, c, d, e, g, f, h) {
     } else {
       if (a.constructor === Array) {
         for (f = 0; f < a.length; f++) {
-          bb(a, b, c, d, e, g, f, h);
+          db(a, b, c, d, e, g, f, h);
         }
       } else {
-        f = b[++d], bb(a, b, c, d, e, g, f, h);
+        f = b[++d], db(a, b, c, d, e, g, f, h);
       }
     }
   } else {
     e.db && e.remove(g);
   }
 }
-;function db(a, b, c, d, e, g, f) {
+;function fb(a, b, c, d, e, g, f) {
   var h = a.length, k = [], l;
-  var m = J();
+  var m = K();
   for (var n = 0, p = void 0, q; n < b; n++) {
     for (var r = 0; r < h; r++) {
       if (q = a[r], n < q.length && (p = q[n])) {
-        for (var u = 0; u < p.length; u++) {
-          q = p[u];
+        for (var v = 0; v < p.length; v++) {
+          q = p[v];
           (l = m[q]) ? m[q]++ : (l = 0, m[q] = 1);
           l = k[l] || (k[l] = []);
           if (!f) {
-            var w = n + (r ? 0 : g || 0);
-            l = l[w] || (l[w] = []);
+            var y = n + (r ? 0 : g || 0);
+            l = l[y] || (l[y] = []);
           }
           l.push(q);
         }
@@ -1595,7 +1646,7 @@ function bb(a, b, c, d, e, g, f, h) {
   }
   if (a = k.length) {
     if (e) {
-      k = 1 < k.length ? eb(k, d, c, f, 0) : (k = k[0]).length > c || d ? k.slice(d, c + d) : k;
+      k = 1 < k.length ? gb(k, d, c, f, 0) : (k = k[0]).length > c || d ? k.slice(d, c + d) : k;
     } else {
       if (a < h) {
         return [];
@@ -1628,8 +1679,8 @@ function bb(a, b, c, d, e, g, f, h) {
   }
   return k;
 }
-function eb(a, b, c, d, e) {
-  var g = [], f = J(), h = a.length, k = 0;
+function gb(a, b, c, d, e) {
+  var g = [], f = K(), h = a.length, k = 0;
   if (d) {
     for (e = h - 1; 0 <= e; e--) {
       d = a[e];
@@ -1656,8 +1707,8 @@ function eb(a, b, c, d, e) {
               if (f[m] = 1, b) {
                 b--;
               } else {
-                var u = p + (q < h - 1 ? e || 0 : 0);
-                (g[u] || (g[u] = [])).push(m);
+                var v = p + (q < h - 1 ? e || 0 : 0);
+                (g[v] || (g[v] = [])).push(m);
                 if (++k === c) {
                   return g;
                 }
@@ -1670,8 +1721,8 @@ function eb(a, b, c, d, e) {
   }
   return g;
 }
-function fb(a, b) {
-  for (var c = J(), d = [], e = 0, g; e < b.length; e++) {
+function hb(a, b) {
+  for (var c = K(), d = [], e = 0, g; e < b.length; e++) {
     g = b[e];
     for (var f = 0; f < g.length; f++) {
       c[g[f]] = 1;
@@ -1700,54 +1751,54 @@ function fb(a, b) {
     b || (b = 100);
     if (m && (!this.db || !d)) {
       m.constructor !== Array && (m = [m]);
-      for (var u = [], w = 0, x = void 0; w < m.length; w++) {
-        x = m[w];
-        if (K(x)) {
+      for (var v = [], y = 0, z = void 0; y < m.length; y++) {
+        z = m[y];
+        if (L(z)) {
           throw Error("A tag option can't be a string, instead it needs a { field: tag } format.");
         }
-        if (x.field && x.tag) {
-          var t = x.tag;
-          if (t.constructor === Array) {
-            for (var z = 0; z < t.length; z++) {
-              u.push(x.field, t[z]);
+        if (z.field && z.tag) {
+          var u = z.tag;
+          if (u.constructor === Array) {
+            for (var w = 0; w < u.length; w++) {
+              v.push(z.field, u[w]);
             }
           } else {
-            u.push(x.field, t);
+            v.push(z.field, u);
           }
         } else {
-          t = Object.keys(x);
-          z = 0;
-          for (var A = void 0, B = void 0; z < t.length; z++) {
-            if (A = t[z], B = x[A], B.constructor === Array) {
-              for (var D = 0; D < B.length; D++) {
-                u.push(A, B[D]);
+          u = Object.keys(z);
+          w = 0;
+          for (var B = void 0, D = void 0; w < u.length; w++) {
+            if (B = u[w], D = z[B], D.constructor === Array) {
+              for (var A = 0; A < D.length; A++) {
+                v.push(B, D[A]);
               }
             } else {
-              u.push(A, B);
+              v.push(B, D);
             }
           }
         }
       }
-      if (!u.length) {
+      if (!v.length) {
         throw Error("Your tag definition within the search options is probably wrong. No valid tags found.");
       }
-      m = u;
+      m = v;
       if (!a) {
         g = [];
-        if (u.length) {
-          for (h = 0; h < u.length; h += 2) {
+        if (v.length) {
+          for (h = 0; h < v.length; h += 2) {
             p = void 0;
             if (this.db) {
-              p = this.index.get(u[h]);
+              p = this.index.get(v[h]);
               if (!p) {
-                console.warn("Tag '" + u[h] + ":" + u[h + 1] + "' will be skipped because there is no field '" + u[h] + "'.");
+                console.warn("Tag '" + v[h] + ":" + v[h + 1] + "' will be skipped because there is no field '" + v[h] + "'.");
                 continue;
               }
-              g.push(p = p.db.tag(u[h + 1], b, r, n));
+              g.push(p = p.db.tag(v[h + 1], b, r, n));
             } else {
-              p = gb.call(this, u[h], u[h + 1], b, r, n);
+              p = ib.call(this, v[h], v[h + 1], b, r, n);
             }
-            e.push({field:u[h], tag:u[h + 1], result:p});
+            e.push({field:v[h], tag:v[h + 1], result:p});
           }
         }
         return g.length ? Promise.all(g).then(function(P) {
@@ -1758,87 +1809,87 @@ function fb(a, b) {
         }) : e;
       }
     }
-    K(l) && (l = [l]);
+    L(l) && (l = [l]);
   }
   l || (l = this.field);
-  u = !d && (this.worker || this.db) && [];
-  w = 0;
-  for (z = x = t = void 0; w < l.length; w++) {
-    if (x = l[w], !this.db || !this.tag || this.I[w]) {
-      t = void 0;
-      K(x) || (t = x, x = t.field, a = t.query || a, b = t.limit || b, r = t.offset || r, p = t.suggest || p, n = this.store && (t.enrich || n));
+  v = !d && (this.worker || this.db) && [];
+  y = 0;
+  for (w = z = u = void 0; y < l.length; y++) {
+    if (z = l[y], !this.db || !this.tag || this.I[y]) {
+      u = void 0;
+      L(z) || (u = z, z = u.field, a = u.query || a, b = u.limit || b, r = u.offset || r, p = u.suggest || p, n = this.store && (u.enrich || n));
       if (d) {
-        t = d[w];
+        u = d[y];
       } else {
-        z = t || c;
-        t = this.index.get(x);
+        w = u || c;
+        u = this.index.get(z);
         if (m) {
           if (this.db) {
-            z.tag = m;
-            var F = t.db.support_tag_search;
-            z.field = l;
+            w.tag = m;
+            var R = u.db.support_tag_search;
+            w.field = l;
           }
-          F || (z.enrich = !1);
+          R || (w.enrich = !1);
         }
-        if (u) {
-          u[w] = t.search(a, b, z);
-          z && n && (z.enrich = n);
+        if (v) {
+          v[y] = u.search(a, b, w);
+          w && n && (w.enrich = n);
           continue;
         } else {
-          t = t.search(a, b, z), z && n && (z.enrich = n);
+          u = u.search(a, b, w), w && n && (w.enrich = n);
         }
       }
-      z = t && t.length;
-      if (m && z) {
-        A = [];
-        B = 0;
+      w = u && u.length;
+      if (m && w) {
+        B = [];
+        D = 0;
         if (this.db && d) {
-          if (!F) {
-            for (D = l.length; D < d.length; D++) {
-              var L = d[D];
-              if (L && L.length) {
-                B++, A.push(L);
+          if (!R) {
+            for (A = l.length; A < d.length; A++) {
+              var G = d[A];
+              if (G && G.length) {
+                D++, B.push(G);
               } else if (!p) {
                 return e;
               }
             }
           }
         } else {
-          D = 0;
-          for (var Ob = L = void 0; D < m.length; D += 2) {
-            L = this.tag.get(m[D]);
-            if (!L) {
-              if (console.warn("Tag '" + m[D] + ":" + m[D + 1] + "' will be skipped because there is no field '" + m[D] + "'."), p) {
+          A = 0;
+          for (var H = G = void 0; A < m.length; A += 2) {
+            G = this.tag.get(m[A]);
+            if (!G) {
+              if (console.warn("Tag '" + m[A] + ":" + m[A + 1] + "' will be skipped because there is no field '" + m[A] + "'."), p) {
                 continue;
               } else {
                 return e;
               }
             }
-            if (Ob = (L = L && L.get(m[D + 1])) && L.length) {
-              B++, A.push(L);
+            if (H = (G = G && G.get(m[A + 1])) && G.length) {
+              D++, B.push(G);
             } else if (!p) {
               return e;
             }
           }
         }
-        if (B) {
-          t = fb(t, A);
-          z = t.length;
-          if (!z && !p) {
+        if (D) {
+          u = hb(u, B);
+          w = u.length;
+          if (!w && !p) {
             return e;
           }
-          B--;
+          D--;
         }
       }
-      if (z) {
-        g[f] = x, e.push(t), f++;
+      if (w) {
+        g[f] = z, e.push(u), f++;
       } else if (1 === l.length) {
         return e;
       }
     }
   }
-  if (u) {
-    if (this.db && m && m.length && !F) {
+  if (v) {
+    if (this.db && m && m.length && !R) {
       for (n = 0; n < m.length; n += 2) {
         g = this.index.get(m[n]);
         if (!g) {
@@ -1848,12 +1899,12 @@ function fb(a, b) {
             return e;
           }
         }
-        u.push(g.db.tag(m[n + 1], b, r, !1));
+        v.push(g.db.tag(m[n + 1], b, r, !1));
       }
     }
-    var Pb = this;
-    return Promise.all(u).then(function(P) {
-      return P.length ? Pb.search(a, b, c, P) : P;
+    var Qb = this;
+    return Promise.all(v).then(function(P) {
+      return P.length ? Qb.search(a, b, c, P) : P;
     });
   }
   if (!f) {
@@ -1862,60 +1913,60 @@ function fb(a, b) {
   if (h && (!n || !this.store)) {
     return e[0];
   }
-  u = [];
+  v = [];
   r = 0;
   for (p = void 0; r < g.length; r++) {
     p = e[r];
-    n && p.length && !p[0].doc && (this.db ? u.push(p = this.index.get(this.field[0]).db.enrich(p)) : p.length && (p = hb.call(this, p)));
+    n && p.length && !p[0].doc && (this.db ? v.push(p = this.index.get(this.field[0]).db.enrich(p)) : p.length && (p = jb.call(this, p)));
     if (h) {
       return p;
     }
     e[r] = {field:g[r], result:p};
   }
-  if (n && this.db && u.length) {
-    var Ga = this;
-    return Promise.all(u).then(function(P) {
+  if (n && this.db && v.length) {
+    var Ia = this;
+    return Promise.all(v).then(function(P) {
       for (var Q = 0; Q < P.length; Q++) {
         e[Q].result = P[Q];
       }
-      return k ? ib(e, b) : q ? jb(e, a, Ga.index, Ga.field, Ga.I, q) : e;
+      return k ? kb(e, b) : q ? lb(e, a, Ia.index, Ia.field, Ia.I, q) : e;
     });
   }
-  return k ? ib(e, b) : q ? jb(e, a, this.index, this.field, this.I, q) : e;
+  return k ? kb(e, b) : q ? lb(e, a, this.index, this.field, this.I, q) : e;
 };
-function jb(a, b, c, d, e, g) {
+function lb(a, b, c, d, e, g) {
   for (var f, h, k, l = 0, m, n, p; l < a.length; l++) {
     for (m = a[l].result, n = a[l].field, k = c.get(n), p = k.encoder, k = k.tokenize, n = e[d.indexOf(n)], p !== f && (f = p, h = f.encode(b)), p = 0; p < m.length; p++) {
-      var q = "", r = za(m[p].doc, n), u = f.encode(r);
+      var q = "", r = za(m[p].doc, n), v = f.encode(r);
       r = r.split(f.split);
-      for (var w = 0, x, t; w < u.length; w++) {
-        x = u[w];
-        t = r[w];
-        for (var z = void 0, A = 0, B; A < h.length; A++) {
-          if (B = h[A], "strict" === k) {
-            if (x === B) {
-              q += (q ? " " : "") + g.replace("$1", t);
-              z = !0;
+      for (var y = 0, z, u; y < v.length; y++) {
+        z = v[y];
+        u = r[y];
+        for (var w = void 0, B = 0, D; B < h.length; B++) {
+          if (D = h[B], "strict" === k) {
+            if (z === D) {
+              q += (q ? " " : "") + g.replace("$1", u);
+              w = !0;
               break;
             }
           } else {
-            var D = x.indexOf(B);
-            if (-1 < D) {
-              q += (q ? " " : "") + t.substring(0, D) + g.replace("$1", t.substring(D, B.length)) + t.substring(D + B.length);
-              z = !0;
+            var A = z.indexOf(D);
+            if (-1 < A) {
+              q += (q ? " " : "") + u.substring(0, A) + g.replace("$1", u.substring(A, D.length)) + u.substring(A + D.length);
+              w = !0;
               break;
             }
           }
         }
-        z || (q += (q ? " " : "") + r[w]);
+        w || (q += (q ? " " : "") + r[y]);
       }
       m[p].highlight = q;
     }
   }
   return a;
 }
-function ib(a, b) {
-  for (var c = [], d = J(), e = 0, g, f; e < a.length; e++) {
+function kb(a, b) {
+  for (var c = [], d = K(), e = 0, g, f; e < a.length; e++) {
     g = a[e];
     f = g.result;
     for (var h = 0, k, l, m; h < f.length; h++) {
@@ -1932,7 +1983,7 @@ function ib(a, b) {
   }
   return c;
 }
-function gb(a, b, c, d, e) {
+function ib(a, b, c, d, e) {
   var g = this.tag.get(a);
   if (!g) {
     return console.warn("Tag '" + a + "' was not found"), [];
@@ -1941,11 +1992,11 @@ function gb(a, b, c, d, e) {
     if (a > c || d) {
       g = g.slice(d, d + c);
     }
-    e && (g = hb.call(this, g));
+    e && (g = jb.call(this, g));
     return g;
   }
 }
-function hb(a) {
+function jb(a) {
   for (var b = Array(a.length), c = 0, d; c < a.length; c++) {
     d = a[c], b[c] = {id:d, doc:this.store.get(d)};
   }
@@ -1959,15 +2010,15 @@ function hb(a) {
   this.I = [];
   this.field = [];
   this.T = [];
-  this.key = (c = b.key || b.id) && kb(c, this.T) || "id";
+  this.key = (c = b.key || b.id) && mb(c, this.T) || "id";
   (d = a.keystore || 0) && (this.keystore = d);
   this.reg = (this.fastupdate = !!a.fastupdate) ? d ? new T(d) : new Map() : d ? new U(d) : new Set();
-  this.H = (c = b.store || null) && !0 !== c && [];
+  this.H = (c = b.store || null) && c && !0 !== c && [];
   this.store = c && (d ? new T(d) : new Map());
   this.cache = (c = a.cache || null) && new W(c);
   a.cache = !1;
   this.worker = a.worker;
-  this.index = lb.call(this, a, b);
+  this.index = nb.call(this, a, b);
   this.tag = null;
   if (c = b.tag) {
     if ("string" === typeof c && (c = [c]), c.length) {
@@ -1981,7 +2032,7 @@ function hb(a) {
         if (!e) {
           throw Error("The tag field from the document descriptor is undefined.");
         }
-        d.custom ? this.M[b] = d.custom : (this.M[b] = kb(e, this.T), d.filter && ("string" === typeof this.M[b] && (this.M[b] = new String(this.M[b])), this.M[b].R = d.filter));
+        d.custom ? this.M[b] = d.custom : (this.M[b] = mb(e, this.T), d.filter && ("string" === typeof this.M[b] && (this.M[b] = new String(this.M[b])), this.M[b].S = d.filter));
         this.$[b] = e;
         this.tag.set(e, new Map());
       }
@@ -1989,14 +2040,14 @@ function hb(a) {
   }
   if (this.worker) {
     a = [];
-    c = y(this.index.values());
+    c = x(this.index.values());
     for (b = c.next(); !b.done; b = c.next()) {
       b = b.value, b.then && a.push(b);
     }
     if (a.length) {
       var g = this;
       return Promise.all(a).then(function(f) {
-        for (var h = 0, k = y(g.index.entries()), l = k.next(); !l.done; l = k.next()) {
+        for (var h = 0, k = x(g.index.entries()), l = k.next(); !l.done; l = k.next()) {
           l = l.value;
           var m = l[0];
           l[1].then && g.index.set(m, f[h++]);
@@ -2008,14 +2059,14 @@ function hb(a) {
     a.db && this.mount(a.db);
   }
 }
-v = V.prototype;
-v.mount = function(a) {
+t = V.prototype;
+t.mount = function(a) {
   var b = this.field;
   if (this.tag) {
     for (var c = 0, d; c < this.$.length; c++) {
       d = this.$[c];
       var e;
-      this.index.set(d, e = new O({}, this.reg));
+      this.index.set(d, e = new N({}, this.reg));
       b === this.field && (b = b.slice(0));
       b.push(d);
       e.tag = this.tag.get(d);
@@ -2036,72 +2087,72 @@ v.mount = function(a) {
   this.db = !0;
   return Promise.all(c);
 };
-v.commit = function(a, b) {
+t.commit = function(a, b) {
   var c = this, d, e, g, f;
   return ta(function(h) {
     if (1 == h.h) {
       d = [];
-      e = y(c.index.values());
+      e = x(c.index.values());
       for (g = e.next(); !g.done; g = e.next()) {
         f = g.value, d.push(f.db.commit(f, a, b));
       }
-      return G(h, Promise.all(d), 2);
+      return F(h, Promise.all(d), 2);
     }
     c.reg.clear();
     h.h = 0;
   });
 };
-v.destroy = function() {
-  for (var a = [], b = y(this.index.values()), c = b.next(); !c.done; c = b.next()) {
+t.destroy = function() {
+  for (var a = [], b = x(this.index.values()), c = b.next(); !c.done; c = b.next()) {
     a.push(c.value.destroy());
   }
   return Promise.all(a);
 };
-function lb(a, b) {
+function nb(a, b) {
   var c = new Map(), d = b.index || b.field || b;
-  K(d) && (d = [d]);
+  L(d) && (d = [d]);
   for (var e = 0, g, f = void 0; e < d.length; e++) {
     g = d[e];
-    K(g) || (f = g, g = g.field);
+    L(g) || (f = g, g = g.field);
     f = M(f) ? Object.assign({}, a, f) : a;
     if (this.worker) {
-      var h = new R(f);
+      var h = new O(f);
       c.set(g, h);
     }
-    this.worker || c.set(g, new O(f, this.reg));
-    f.custom ? this.I[e] = f.custom : (this.I[e] = kb(g, this.T), f.filter && ("string" === typeof this.I[e] && (this.I[e] = new String(this.I[e])), this.I[e].R = f.filter));
+    this.worker || c.set(g, new N(f, this.reg));
+    f.custom ? this.I[e] = f.custom : (this.I[e] = mb(g, this.T), f.filter && ("string" === typeof this.I[e] && (this.I[e] = new String(this.I[e])), this.I[e].S = f.filter));
     this.field[e] = g;
   }
   if (this.H) {
-    for (a = b.store, K(a) && (a = [a]), b = 0; b < a.length; b++) {
-      d = a[b], e = d.field || d, d.custom ? (this.H[b] = d.custom, d.custom.la = e) : (this.H[b] = kb(e, this.T), d.filter && ("string" === typeof this.H[b] && (this.H[b] = new String(this.H[b])), this.H[b].R = d.filter));
+    for (a = b.store, L(a) && (a = [a]), b = 0; b < a.length; b++) {
+      d = a[b], e = d.field || d, d.custom ? (this.H[b] = d.custom, d.custom.la = e) : (this.H[b] = mb(e, this.T), d.filter && ("string" === typeof this.H[b] && (this.H[b] = new String(this.H[b])), this.H[b].S = d.filter));
     }
   }
   return c;
 }
-function kb(a, b) {
+function mb(a, b) {
   for (var c = a.split(":"), d = 0, e = 0; e < c.length; e++) {
     a = c[e], "]" === a[a.length - 1] && (a = a.substring(0, a.length - 2)) && (b[d] = !0), a && (c[d++] = a);
   }
   d < c.length && (c.length = d);
   return 1 < d ? c : c[0];
 }
-v.append = function(a, b) {
+t.append = function(a, b) {
   return this.add(a, b, !0);
 };
-v.update = function(a, b) {
+t.update = function(a, b) {
   return this.remove(a).add(a, b);
 };
-v.remove = function(a) {
+t.remove = function(a) {
   M(a) && (a = za(a, this.key));
-  for (var b = y(this.index.values()), c = b.next(); !c.done; c = b.next()) {
+  for (var b = x(this.index.values()), c = b.next(); !c.done; c = b.next()) {
     c.value.remove(a, !0);
   }
   if (this.reg.has(a)) {
     if (this.tag && !this.fastupdate) {
-      for (b = y(this.tag.values()), c = b.next(); !c.done; c = b.next()) {
+      for (b = x(this.tag.values()), c = b.next(); !c.done; c = b.next()) {
         c = c.value;
-        for (var d = y(c), e = d.next(); !e.done; e = d.next()) {
+        for (var d = x(c), e = d.next(); !e.done; e = d.next()) {
           var g = e.value;
           e = g[0];
           g = g[1];
@@ -2116,38 +2167,38 @@ v.remove = function(a) {
   this.cache && this.cache.remove(a);
   return this;
 };
-v.clear = function() {
-  for (var a = y(this.index.values()), b = a.next(); !b.done; b = a.next()) {
+t.clear = function() {
+  for (var a = x(this.index.values()), b = a.next(); !b.done; b = a.next()) {
     b.value.clear();
   }
   if (this.tag) {
-    for (a = y(this.tag.values()), b = a.next(); !b.done; b = a.next()) {
+    for (a = x(this.tag.values()), b = a.next(); !b.done; b = a.next()) {
       b.value.clear();
     }
   }
   this.store && this.store.clear();
   return this;
 };
-v.contain = function(a) {
+t.contain = function(a) {
   return this.db ? this.index.get(this.field[0]).db.has(a) : this.reg.has(a);
 };
-v.cleanup = function() {
-  for (var a = y(this.index.values()), b = a.next(); !b.done; b = a.next()) {
+t.cleanup = function() {
+  for (var a = x(this.index.values()), b = a.next(); !b.done; b = a.next()) {
     b.value.cleanup();
   }
   return this;
 };
-v.get = function(a) {
+t.get = function(a) {
   return this.db ? this.index.get(this.field[0]).db.enrich(a).then(function(b) {
     return b[0] && b[0].doc;
   }) : this.store.get(a);
 };
-v.set = function(a, b) {
+t.set = function(a, b) {
   this.store.set(a, b);
   return this;
 };
-v.searchCache = mb;
-v.export = function(a, b, c, d) {
+t.searchCache = ob;
+t.export = function(a, b, c, d) {
   c = void 0 === c ? 0 : c;
   d = void 0 === d ? 0 : d;
   if (c < this.field.length) {
@@ -2163,17 +2214,17 @@ v.export = function(a, b, c, d) {
   switch(d) {
     case 0:
       var f = "reg";
-      var h = Ta(this.reg);
+      var h = Va(this.reg);
       b = null;
       break;
     case 1:
       f = "tag";
-      h = Ra(this.tag, this.reg.size);
+      h = Ta(this.tag, this.reg.size);
       b = null;
       break;
     case 2:
       f = "doc";
-      h = Pa(this.store);
+      h = Ra(this.store);
       b = null;
       break;
     case 3:
@@ -2184,11 +2235,11 @@ v.export = function(a, b, c, d) {
     default:
       return;
   }
-  return Va.call(this, a, b, f, h, c, d);
+  return Xa.call(this, a, b, f, h, c, d);
 };
-v.import = function(a, b) {
+t.import = function(a, b) {
   if (b) {
-    K(b) && (b = JSON.parse(b));
+    L(b) && (b = JSON.parse(b));
     a = a.split(".");
     "json" === a[a.length - 1] && a.pop();
     var c = 2 < a.length ? a[0] : "";
@@ -2199,21 +2250,21 @@ v.import = function(a, b) {
     switch(a) {
       case "reg":
         this.fastupdate = !1;
-        this.reg = Ua(b, this.reg);
+        this.reg = Wa(b, this.reg);
         for (b = 0; b < this.field.length; b++) {
           c = this.index.get(this.field[b]), c.fastupdate = !1, c.reg = this.reg;
         }
         break;
       case "tag":
-        this.tag = Sa(b, this.tag);
+        this.tag = Ua(b, this.tag);
         break;
       case "doc":
-        this.store = Qa(b, this.store);
+        this.store = Sa(b, this.store);
     }
   }
 };
-Na(V.prototype);
-function mb(a, b, c) {
+Pa(V.prototype);
+function ob(a, b, c) {
   a = ("object" === typeof a ? "" + a.query : a).toLowerCase();
   var d = this.cache.get(a);
   if (!d) {
@@ -2244,7 +2295,7 @@ W.prototype.get = function(a) {
   return b;
 };
 W.prototype.remove = function(a) {
-  for (var b = y(this.cache), c = b.next(); !c.done; c = b.next()) {
+  for (var b = x(this.cache), c = b.next(); !c.done; c = b.next()) {
     c = c.value;
     var d = c[0];
     c[1].includes(a) && this.cache.delete(d);
@@ -2254,49 +2305,49 @@ W.prototype.clear = function() {
   this.cache.clear();
   this.h = "";
 };
-var nb = {normalize:function(a) {
+var pb = {normalize:function(a) {
   return a.toLowerCase();
 }, dedupe:!1};
-var ob = new Map([["b", "p"], ["v", "f"], ["w", "f"], ["z", "s"], ["x", "s"], ["d", "t"], ["n", "m"], ["c", "k"], ["g", "k"], ["j", "k"], ["q", "k"], ["i", "e"], ["y", "e"], ["u", "o"]]);
-var pb = new Map([["ae", "a"], ["oe", "o"], ["sh", "s"], ["kh", "k"], ["th", "t"], ["pf", "f"]]), qb = [/([^aeo])h(.)/g, "$1$2", /([aeo])h([^aeo]|$)/g, "$1$2", /([^0-9])\1+/g, "$1"];
-var rb = {a:"", e:"", i:"", o:"", u:"", y:"", b:1, f:1, p:1, v:1, c:2, g:2, j:2, k:2, q:2, s:2, x:2, z:2, "\u00df":2, d:3, t:3, l:4, m:5, n:5, r:6};
-var sb = /[\x00-\x7F]+/g;
-var tb = /[\x00-\x7F]+/g;
+var qb = new Map([["b", "p"], ["v", "f"], ["w", "f"], ["z", "s"], ["x", "s"], ["d", "t"], ["n", "m"], ["c", "k"], ["g", "k"], ["j", "k"], ["q", "k"], ["i", "e"], ["y", "e"], ["u", "o"]]);
+var rb = new Map([["ae", "a"], ["oe", "o"], ["sh", "s"], ["kh", "k"], ["th", "t"], ["pf", "f"]]), sb = [/([^aeo])h(.)/g, "$1$2", /([aeo])h([^aeo]|$)/g, "$1$2", /([^0-9])\1+/g, "$1"];
+var tb = {a:"", e:"", i:"", o:"", u:"", y:"", b:1, f:1, p:1, v:1, c:2, g:2, j:2, k:2, q:2, s:2, x:2, z:2, "\u00df":2, d:3, t:3, l:4, m:5, n:5, r:6};
 var ub = /[\x00-\x7F]+/g;
-var vb = {LatinExact:{normalize:!1, dedupe:!1}, LatinDefault:nb, LatinSimple:{normalize:!0, dedupe:!0}, LatinBalance:{normalize:!0, dedupe:!0, mapper:ob}, LatinAdvanced:{normalize:!0, dedupe:!0, mapper:ob, matcher:pb, replacer:qb}, LatinExtra:{normalize:!0, dedupe:!0, mapper:ob, replacer:qb.concat([/(?!^)[aeo]/g, ""]), matcher:pb}, LatinSoundex:{normalize:!0, dedupe:!1, include:{letter:!0}, finalize:function(a) {
+var vb = /[\x00-\x7F]+/g;
+var wb = /[\x00-\x7F]+/g;
+var xb = {LatinExact:{normalize:!1, dedupe:!1}, LatinDefault:pb, LatinSimple:{normalize:!0, dedupe:!0}, LatinBalance:{normalize:!0, dedupe:!0, mapper:qb}, LatinAdvanced:{normalize:!0, dedupe:!0, mapper:qb, matcher:rb, replacer:sb}, LatinExtra:{normalize:!0, dedupe:!0, mapper:qb, replacer:sb.concat([/(?!^)[aeo]/g, ""]), matcher:rb}, LatinSoundex:{normalize:!0, dedupe:!1, include:{letter:!0}, finalize:function(a) {
   for (var b = 0; b < a.length; b++) {
-    for (var c = a[b], d = c.charAt(0), e = rb[d], g = 1, f; g < c.length && (f = c.charAt(g), "h" === f || "w" === f || !(f = rb[f]) || f === e || (d += f, e = f, 4 !== d.length)); g++) {
+    for (var c = a[b], d = c.charAt(0), e = tb[d], g = 1, f; g < c.length && (f = c.charAt(g), "h" === f || "w" === f || !(f = tb[f]) || f === e || (d += f, e = f, 4 !== d.length)); g++) {
     }
     a[b] = d;
   }
 }}, ArabicDefault:{rtl:!0, normalize:!1, dedupe:!0, prepare:function(a) {
-  return ("" + a).replace(sb, " ");
-}}, CjkDefault:{normalize:!1, dedupe:!0, split:"", prepare:function(a) {
-  return ("" + a).replace(tb, "");
-}}, CyrillicDefault:{normalize:!1, dedupe:!0, prepare:function(a) {
   return ("" + a).replace(ub, " ");
+}}, CjkDefault:{normalize:!1, dedupe:!0, split:"", prepare:function(a) {
+  return ("" + a).replace(vb, "");
+}}, CyrillicDefault:{normalize:!1, dedupe:!0, prepare:function(a) {
+  return ("" + a).replace(wb, " ");
 }}};
-var wb = {memory:{resolution:1}, performance:{resolution:6, fastupdate:!0, context:{depth:1, resolution:3}}, match:{tokenize:"forward"}, score:{resolution:9, context:{depth:2, resolution:9}}};
-J();
-O.prototype.add = function(a, b, c, d) {
+var yb = {memory:{resolution:1}, performance:{resolution:6, fastupdate:!0, context:{depth:1, resolution:3}}, match:{tokenize:"forward"}, score:{resolution:9, context:{depth:2, resolution:9}}};
+K();
+N.prototype.add = function(a, b, c, d) {
   if (b && (a || 0 === a)) {
     if (!d && !c && this.reg.has(a)) {
       return this.update(a, b);
     }
     b = this.encoder.encode(b);
     if (d = b.length) {
-      for (var e = J(), g = J(), f = this.depth, h = this.resolution, k = 0; k < d; k++) {
+      for (var e = K(), g = K(), f = this.depth, h = this.resolution, k = 0; k < d; k++) {
         var l = b[this.rtl ? d - 1 - k : k], m = l.length;
         if (m && (f || !g[l])) {
-          var n = this.score ? this.score(b, l, k, null, 0) : xb(h, d, k), p = "";
+          var n = this.score ? this.score(b, l, k, null, 0) : zb(h, d, k), p = "";
           switch(this.tokenize) {
             case "full":
               if (2 < m) {
                 for (n = 0; n < m; n++) {
                   for (var q = m; q > n; q--) {
                     p = l.substring(n, q);
-                    var r = this.score ? this.score(b, l, k, p, n) : xb(h, d, k, m, n);
-                    yb(this, g, p, r, a, c);
+                    var r = this.score ? this.score(b, l, k, p, n) : zb(h, d, k, m, n);
+                    Ab(this, g, p, r, a, c);
                   }
                 }
                 break;
@@ -2304,24 +2355,24 @@ O.prototype.add = function(a, b, c, d) {
             case "reverse":
               if (1 < m) {
                 for (q = m - 1; 0 < q; q--) {
-                  p = l[q] + p, r = this.score ? this.score(b, l, k, p, q) : xb(h, d, k, m, q), yb(this, g, p, r, a, c);
+                  p = l[q] + p, r = this.score ? this.score(b, l, k, p, q) : zb(h, d, k, m, q), Ab(this, g, p, r, a, c);
                 }
                 p = "";
               }
             case "forward":
               if (1 < m) {
                 for (q = 0; q < m; q++) {
-                  p += l[q], yb(this, g, p, n, a, c);
+                  p += l[q], Ab(this, g, p, n, a, c);
                 }
                 break;
               }
             default:
-              if (yb(this, g, l, n, a, c), f && 1 < d && k < d - 1) {
-                for (m = J(), p = this.aa, n = l, q = Math.min(f + 1, d - k), r = m[n] = 1; r < q; r++) {
+              if (Ab(this, g, l, n, a, c), f && 1 < d && k < d - 1) {
+                for (m = K(), p = this.aa, n = l, q = Math.min(f + 1, d - k), r = m[n] = 1; r < q; r++) {
                   if ((l = b[this.rtl ? d - 1 - k - r : k + r]) && !m[l]) {
                     m[l] = 1;
-                    var u = this.score ? this.score(b, n, k, l, r) : xb(p + (d / 2 > p ? 0 : 1), d, k, q - 1, r - 1), w = this.bidirectional && l > n;
-                    yb(this, e, w ? n : l, u, a, c, w ? l : n);
+                    var v = this.score ? this.score(b, n, k, l, r) : zb(p + (d / 2 > p ? 0 : 1), d, k, q - 1, r - 1), y = this.bidirectional && l > n;
+                    Ab(this, e, y ? n : l, v, a, c, y ? l : n);
                   }
                 }
               }
@@ -2333,17 +2384,17 @@ O.prototype.add = function(a, b, c, d) {
       b = "";
     }
   }
-  this.db && (b || this.commit_task.push({del:a}), this.da && zb(this));
+  this.db && (b || this.commit_task.push({del:a}), this.da && Bb(this));
   return this;
 };
-function yb(a, b, c, d, e, g, f) {
+function Ab(a, b, c, d, e, g, f) {
   var h = f ? a.ctx : a.map, k;
   if (!b[c] || f && !(k = b[c])[f]) {
-    if (f ? (b = k || (b[c] = J()), b[f] = 1, (k = h.get(f)) ? h = k : h.set(f, h = new Map())) : b[c] = 1, (k = h.get(c)) ? h = k : h.set(c, h = k = []), h = h[d] || (h[d] = []), !g || !h.includes(e)) {
+    if (f ? (b = k || (b[c] = K()), b[f] = 1, (k = h.get(f)) ? h = k : h.set(f, h = new Map())) : b[c] = 1, (k = h.get(c)) ? h = k : h.set(c, h = k = []), h = h[d] || (h[d] = []), !g || !h.includes(e)) {
       if (h.length === Math.pow(2, 31) - 1) {
         b = new S(h);
         if (a.fastupdate) {
-          for (c = y(a.reg.values()), g = c.next(); !g.done; g = c.next()) {
+          for (c = x(a.reg.values()), g = c.next(); !g.done; g = c.next()) {
             g = g.value, g.includes(h) && (g[g.indexOf(h)] = b);
           }
         }
@@ -2354,12 +2405,12 @@ function yb(a, b, c, d, e, g, f) {
     }
   }
 }
-function xb(a, b, c, d, e) {
+function zb(a, b, c, d, e) {
   return c && 1 < a ? b + (d || 0) <= a ? c + (e || 0) : (a - 1) / (b + (d || 0)) * (c + (e || 0)) + 1 | 0 : 0;
 }
 ;function X(a, b, c, d) {
   if (1 === a.length) {
-    return a = a[0], a = c || a.length > b ? b ? a.slice(c, c + b) : a.slice(c) : a, d ? Ab(a) : a;
+    return a = a[0], a = c || a.length > b ? b ? a.slice(c, c + b) : a.slice(c) : a, d ? Cb(a) : a;
   }
   for (var e = [], g = 0, f = void 0, h = void 0; g < a.length; g++) {
     if ((f = a[g]) && (h = f.length)) {
@@ -2374,7 +2425,7 @@ function xb(a, b, c, d, e) {
         h > b && (f = f.slice(0, b), h = f.length), e.push(f);
       } else {
         if (h >= b) {
-          return h > b && (f = f.slice(0, b)), d ? Ab(f) : f;
+          return h > b && (f = f.slice(0, b)), d ? Cb(f) : f;
         }
         e = [f];
       }
@@ -2388,9 +2439,9 @@ function xb(a, b, c, d, e) {
     return e;
   }
   e = 1 < e.length ? [].concat.apply([], e) : e[0];
-  return d ? Ab(e) : e;
+  return d ? Cb(e) : e;
 }
-function Ab(a) {
+function Cb(a) {
   for (var b = 0; b < a.length; b++) {
     a[b] = {score:b, id:a[b]};
   }
@@ -2437,19 +2488,19 @@ function Ab(a) {
   if (c.length) {
     return Promise.all(c).then(function() {
       a.result.length && (d = d.concat([a.result]));
-      a.result = Bb(d, e, g, f, h, a.J);
+      a.result = Db(d, e, g, f, h, a.J);
       return h ? a.result : a;
     });
   }
-  d.length && (this.result.length && (d = d.concat([this.result])), this.result = Bb(d, e, g, f, h, this.J));
+  d.length && (this.result.length && (d = d.concat([this.result])), this.result = Db(d, e, g, f, h, this.J));
   return h ? this.result : this;
 };
-function Bb(a, b, c, d, e, g) {
+function Db(a, b, c, d, e, g) {
   if (!a.length) {
     return a;
   }
   "object" === typeof b && (c = b.offset || 0, d = b.enrich || !1, b = b.limit || 0);
-  return 2 > a.length ? e ? X(a[0], b, c, d) : a[0] : eb(a, c, b, e, g);
+  return 2 > a.length ? e ? X(a[0], b, c, d) : a[0] : gb(a, c, b, e, g);
 }
 ;Y.prototype.and = function() {
   if (this.result.length) {
@@ -2496,24 +2547,24 @@ function Bb(a, b, c, d, e, g) {
     if (c.length) {
       return Promise.all(c).then(function() {
         d = [a.result].concat(d);
-        a.result = Cb(d, e, g, f, a.J, h);
+        a.result = Eb(d, e, g, f, a.J, h);
         return f ? a.result : a;
       });
     }
     d = [this.result].concat(d);
-    this.result = Cb(d, e, g, f, this.J, h);
+    this.result = Eb(d, e, g, f, this.J, h);
     return f ? this.result : this;
   }
   return this;
 };
-function Cb(a, b, c, d, e, g) {
+function Eb(a, b, c, d, e, g) {
   if (2 > a.length) {
     return [];
   }
   var f = [];
-  J();
+  K();
   var h = Aa(a);
-  return h ? db(a, h, b, c, g, e, d) : f;
+  return h ? fb(a, h, b, c, g, e, d) : f;
 }
 ;Y.prototype.xor = function() {
   var a = this, b = arguments, c = b[0];
@@ -2556,14 +2607,14 @@ function Cb(a, b, c, d, e, g) {
   if (c.length) {
     return Promise.all(c).then(function() {
       a.result.length && (d = [a.result].concat(d));
-      a.result = Db(d, e, g, f, !h, a.J);
+      a.result = Fb(d, e, g, f, !h, a.J);
       return h ? a.result : a;
     });
   }
-  d.length && (this.result.length && (d = [this.result].concat(d)), this.result = Db(d, e, g, f, !h, a.J));
+  d.length && (this.result.length && (d = [this.result].concat(d)), this.result = Fb(d, e, g, f, !h, a.J));
   return h ? this.result : this;
 };
-function Db(a, b, c, d, e, g) {
+function Fb(a, b, c, d, e, g) {
   if (!a.length) {
     return a;
   }
@@ -2571,7 +2622,7 @@ function Db(a, b, c, d, e, g) {
     return e ? X(a[0], b, c, d) : a[0];
   }
   d = [];
-  for (var f = J(), h = 0, k = 0, l; k < a.length; k++) {
+  for (var f = K(), h = 0, k = 0, l; k < a.length; k++) {
     if (l = a[k]) {
       for (var m = 0, n; m < l.length; m++) {
         if (n = l[m]) {
@@ -2652,14 +2703,14 @@ function Db(a, b, c, d, e, g) {
   }
   if (c.length) {
     return Promise.all(c).then(function() {
-      a.result = Eb.call(a, d, e, g, f);
+      a.result = Gb.call(a, d, e, g, f);
       return f ? a.result : a;
     });
   }
-  d.length && (this.result = Eb.call(this, d, e, g, f));
+  d.length && (this.result = Gb.call(this, d, e, g, f));
   return f ? this.result : this;
 };
-function Eb(a, b, c, d) {
+function Gb(a, b, c, d) {
   if (!a.length) {
     return this.result;
   }
@@ -2730,13 +2781,13 @@ Y.prototype.boost = function(a) {
   return this;
 };
 Y.prototype.resolve = function(a, b, c) {
-  Fb = 1;
+  Hb = 1;
   var d = this.result;
   this.result = this.index = null;
   return d.length ? ("object" === typeof a && (c = a.enrich, b = a.offset, a = a.limit), X(d, a || 100, b, c)) : d;
 };
-var Fb = 1;
-O.prototype.search = function(a, b, c) {
+var Hb = 1;
+N.prototype.search = function(a, b, c) {
   c || (!b && M(a) ? (c = a, a = "") : M(b) && (c = b, b = 0));
   var d = [], e = 0, g;
   if (c) {
@@ -2745,143 +2796,145 @@ O.prototype.search = function(a, b, c) {
     e = c.offset || 0;
     var f = c.context;
     var h = c.suggest;
-    (g = Fb && !1 !== c.resolve) || (Fb = 0);
+    (g = Hb && !1 !== c.resolve) || (Hb = 0);
     var k = g && c.enrich;
     var l = c.boost;
-    var m = this.db && c.tag;
+    var m = c.resolution;
+    var n = this.db && c.tag;
   } else {
-    g = this.resolve || Fb;
+    g = this.resolve || Hb;
   }
-  a = this.encoder.encode(a);
-  var n = a.length;
+  var p = this.encoder.encode(a);
+  var q = p.length;
   b || !g || (b = 100);
-  if (1 === n) {
-    return Gb.call(this, a[0], "", b, e, g, k, m);
+  if (1 === q) {
+    return Ib.call(this, p[0], "", b, e, g, k, n);
   }
   f = this.depth && !1 !== f;
-  if (2 === n && f && !h) {
-    return Gb.call(this, a[0], a[1], b, e, g, k, m);
+  if (2 === q && f && !h) {
+    return Ib.call(this, p[0], p[1], b, e, g, k, n);
   }
-  var p = c = 0;
-  if (1 < n) {
-    for (var q = J(), r = [], u = 0, w = void 0; u < n; u++) {
-      if ((w = a[u]) && !q[w]) {
-        if (h || this.db || Z(this, w)) {
-          r.push(w), q[w] = 1;
+  var r = c = 0;
+  if (1 < q) {
+    for (var v = K(), y = [], z = 0, u = void 0; z < q; z++) {
+      if ((u = p[z]) && !v[u]) {
+        if (h || this.db || Z(this, u)) {
+          y.push(u), v[u] = 1;
         } else {
           return g ? d : new Y(d);
         }
-        w = w.length;
-        c = Math.max(c, w);
-        p = p ? Math.min(p, w) : w;
+        u = u.length;
+        c = Math.max(c, u);
+        r = r ? Math.min(r, u) : u;
       }
     }
-    a = r;
-    n = a.length;
+    p = y;
+    q = a.length;
   }
-  if (!n) {
+  if (!q) {
     return g ? d : new Y(d);
   }
-  var x = 0;
-  if (1 === n) {
-    return Gb.call(this, a[0], "", b, e, g, k, m);
+  var w = 0;
+  if (1 === q) {
+    return Ib.call(this, p[0], "", b, e, g, k, n);
   }
-  if (2 === n && f && !h) {
-    return Gb.call(this, a[0], a[1], b, e, g, k, m);
+  if (2 === q && f && !h) {
+    return Ib.call(this, p[0], p[1], b, e, g, k, n);
   }
-  if (1 < n) {
+  if (1 < q) {
     if (f) {
-      var t = a[0];
-      x = 1;
+      var B = p[0];
+      w = 1;
     } else {
-      9 < c && 3 < c / p && a.sort(xa);
+      9 < c && 3 < c / r && p.sort(xa);
     }
   }
+  m || 0 === m || (m = this.resolution);
   if (this.db) {
-    if (this.db.search && (f = this.db.search(this, a, b, e, h, g, k, m), !1 !== f)) {
-      return f;
+    if (this.db.search && (a = this.db.search(this, p, b, e, h, g, k, n), !1 !== a)) {
+      return a;
     }
-    var z = this;
+    var D = this;
     return function() {
-      var A, B, D;
-      return ta(function(F) {
-        switch(F.h) {
+      var A, R, G;
+      return ta(function(H) {
+        switch(H.h) {
           case 1:
-            B = A = void 0;
+            R = A = void 0;
           case 2:
-            if (!(x < n)) {
-              F.h = 4;
+            if (!(w < q)) {
+              H.h = 4;
               break;
             }
-            B = a[x];
-            return t ? G(F, Z(z, B, t, 0, 0, !1, !1), 8) : G(F, Z(z, B, "", 0, 0, !1, !1), 7);
+            R = p[w];
+            return B ? F(H, Z(D, R, B, 0, 0, !1, !1), 8) : F(H, Z(D, R, "", 0, 0, !1, !1), 7);
           case 7:
-            A = F.F;
-            A = Hb(A, d, h, z.resolution);
-            F.h = 6;
+            A = H.D;
+            A = Jb(A, d, h, m);
+            H.h = 6;
             break;
           case 8:
-            A = F.F, A = Hb(A, d, h, z.aa), h && !1 === A && d.length || (t = B);
+            A = H.D, A = Jb(A, d, h, D.aa), h && !1 === A && d.length || (B = R);
           case 6:
             if (A) {
-              return F.return(A);
+              return H.return(A);
             }
-            if (h && x === n - 1) {
-              D = d.length;
-              if (!D) {
-                if (t) {
-                  t = "";
-                  x = -1;
-                  F.h = 3;
+            if (h && w === q - 1) {
+              G = d.length;
+              if (!G) {
+                if (B) {
+                  B = "";
+                  w = -1;
+                  H.h = 3;
                   break;
                 }
-                return F.return(d);
+                return H.return(d);
               }
-              if (1 === D) {
-                return F.return(g ? X(d[0], b, e) : new Y(d[0]));
+              if (1 === G) {
+                return H.return(g ? X(d[0], b, e) : new Y(d[0]));
               }
             }
           case 3:
-            x++;
-            F.h = 2;
+            w++;
+            H.h = 2;
             break;
           case 4:
-            return F.return(g ? db(d, z.resolution, b, e, h, l, g) : new Y(d[0]));
+            return H.return(g ? fb(d, m, b, e, h, l, g) : new Y(d[0]));
         }
       });
     }();
   }
-  for (k = f = void 0; x < n; x++) {
-    k = a[x];
-    t ? (f = Z(this, k, t, 0, 0, !1, !1), f = Hb(f, d, h, this.aa), h && !1 === f && d.length || (t = k)) : (f = Z(this, k, "", 0, 0, !1, !1), f = Hb(f, d, h, this.resolution));
-    if (f) {
-      return f;
+  for (f = a = void 0; w < q; w++) {
+    f = p[w];
+    B ? (a = Z(this, f, B, 0, 0, !1, !1), a = Jb(a, d, h, this.aa), h && !1 === a && d.length || (B = f)) : (a = Z(this, f, "", 0, 0, !1, !1), a = Jb(a, d, h, m));
+    if (a) {
+      return a;
     }
-    if (h && x === n - 1) {
-      f = d.length;
-      if (!f) {
-        if (t) {
-          t = "";
-          x = -1;
+    if (h && w === q - 1) {
+      a = d.length;
+      if (!a) {
+        if (B) {
+          B = "";
+          w = -1;
           continue;
         }
         return d;
       }
-      if (1 === f) {
+      if (1 === a) {
         return g ? X(d[0], b, e) : new Y(d[0]);
       }
     }
   }
-  d = db(d, this.resolution, b, e, h, l, g);
+  d = fb(d, m, b, e, h, l, g);
   return g ? d : new Y(d);
 };
-function Gb(a, b, c, d, e, g, f) {
+function Ib(a, b, c, d, e, g, f) {
   a = Z(this, a, b, c, d, e, g, f);
   return this.db ? a.then(function(h) {
     return e ? h : h && h.length ? e ? X(h, c, d) : new Y(h) : e ? [] : new Y([]);
   }) : a && a.length ? e ? X(a, c, d) : new Y(a) : e ? [] : new Y([]);
 }
-function Hb(a, b, c, d) {
+function Jb(a, b, c, d) {
   var e = [];
   if (a) {
     d = Math.min(a.length, d);
@@ -2904,7 +2957,7 @@ function Z(a, b, c, d, e, g, f, h) {
   a = c ? (a = a.ctx.get(k ? b : c)) && a.get(k ? c : b) : a.map.get(b);
   return a;
 }
-;O.prototype.remove = function(a, b) {
+;N.prototype.remove = function(a, b) {
   var c = this.reg.size && (this.fastupdate ? this.reg.get(a) : this.reg.has(a));
   if (c) {
     if (this.fastupdate) {
@@ -2919,15 +2972,15 @@ function Z(a, b, c, d, e, g, f, h) {
         }
       }
     } else {
-      Ib(this.map, a), this.depth && Ib(this.ctx, a);
+      Kb(this.map, a), this.depth && Kb(this.ctx, a);
     }
     b || this.reg.delete(a);
   }
-  this.db && (this.commit_task.push({del:a}), this.da && zb(this));
+  this.db && (this.commit_task.push({del:a}), this.da && Bb(this));
   this.cache && this.cache.remove(a);
   return this;
 };
-function Ib(a, b) {
+function Kb(a, b) {
   var c = 0;
   if (a.constructor === Array) {
     for (var d = 0, e = void 0, g; d < a.length; d++) {
@@ -2941,67 +2994,66 @@ function Ib(a, b) {
       }
     }
   } else {
-    for (d = y(a), e = d.next(); !e.done; e = d.next()) {
-      g = e.value, e = g[0], (g = Ib(g[1], b)) ? c += g : a.delete(e);
+    for (d = x(a), e = d.next(); !e.done; e = d.next()) {
+      g = e.value, e = g[0], (g = Kb(g[1], b)) ? c += g : a.delete(e);
     }
   }
   return c;
 }
-;function O(a, b) {
-  if (!this || this.constructor !== O) {
-    return new O(a);
+;function N(a, b) {
+  if (!this || this.constructor !== N) {
+    return new N(a);
   }
   if (a) {
-    var c = K(a) ? a : a.preset;
-    c && (wb[c] || console.warn("Preset not found: " + c), a = Object.assign({}, wb[c], a));
+    var c = L(a) ? a : a.preset;
+    c && (yb[c] || console.warn("Preset not found: " + c), a = Object.assign({}, yb[c], a));
   } else {
     a = {};
   }
-  c = a.context || {};
-  var d = K(a.encoder) ? vb[a.encoder] : a.encode || a.encoder || nb;
-  this.encoder = d.encode ? d : "object" === typeof d ? new N(d) : {encode:d};
-  var e;
+  c = a.context;
+  var d = !0 === c ? {depth:1} : c || {}, e = L(a.encoder) ? xb[a.encoder] : a.encode || a.encoder || pb;
+  this.encoder = e.encode ? e : "object" === typeof e ? new Ha(e) : {encode:e};
   this.resolution = a.resolution || 9;
-  this.tokenize = e = a.tokenize || "strict";
-  this.depth = "strict" === e && c.depth || 0;
-  this.bidirectional = !1 !== c.bidirectional;
+  this.tokenize = c = a.tokenize || "strict";
+  this.depth = "strict" === c && d.depth || 0;
+  this.bidirectional = !1 !== d.bidirectional;
   this.fastupdate = !!a.fastupdate;
   this.score = a.score || null;
-  (e = a.keystore || 0) && (this.keystore = e);
-  this.map = e ? new T(e) : new Map();
-  this.ctx = e ? new T(e) : new Map();
-  this.reg = b || (this.fastupdate ? e ? new T(e) : new Map() : e ? new U(e) : new Set());
-  this.aa = c.resolution || 1;
-  this.rtl = d.rtl || a.rtl || !1;
-  this.cache = (e = a.cache || null) && new W(e);
+  (c = a.keystore || 0) && (this.keystore = c);
+  this.map = c ? new T(c) : new Map();
+  this.ctx = c ? new T(c) : new Map();
+  this.reg = b || (this.fastupdate ? c ? new T(c) : new Map() : c ? new U(c) : new Set());
+  this.aa = d.resolution || 3;
+  this.rtl = e.rtl || a.rtl || !1;
+  this.cache = (c = a.cache || null) && new W(c);
   this.resolve = !1 !== a.resolve;
-  if (e = a.db) {
-    this.db = this.mount(e);
+  if (c = a.db) {
+    this.db = this.mount(c);
   }
   this.da = !1 !== a.commit;
   this.commit_task = [];
   this.commit_timer = null;
 }
-v = O.prototype;
-v.mount = function(a) {
+t = N.prototype;
+t.mount = function(a) {
   this.commit_timer && (clearTimeout(this.commit_timer), this.commit_timer = null);
   return a.mount(this);
 };
-v.commit = function(a, b) {
+t.commit = function(a, b) {
   this.commit_timer && (clearTimeout(this.commit_timer), this.commit_timer = null);
   return this.db.commit(this, a, b);
 };
-v.destroy = function() {
+t.destroy = function() {
   this.commit_timer && (clearTimeout(this.commit_timer), this.commit_timer = null);
   return this.db.destroy();
 };
-function zb(a) {
+function Bb(a) {
   a.commit_timer || (a.commit_timer = setTimeout(function() {
     a.commit_timer = null;
     a.db.commit(a, void 0, void 0);
   }, 0));
 }
-v.clear = function() {
+t.clear = function() {
   this.map.clear();
   this.ctx.clear();
   this.reg.clear();
@@ -3009,48 +3061,48 @@ v.clear = function() {
   this.db && (this.commit_timer && clearTimeout(this.commit_timer), this.commit_timer = null, this.commit_task = [{clear:!0}]);
   return this;
 };
-v.append = function(a, b) {
+t.append = function(a, b) {
   return this.add(a, b, !0);
 };
-v.contain = function(a) {
+t.contain = function(a) {
   return this.db ? this.db.has(a) : this.reg.has(a);
 };
-v.update = function(a, b) {
+t.update = function(a, b) {
   var c = this, d = this.remove(a);
   return d && d.then ? d.then(function() {
     return c.add(a, b);
   }) : this.add(a, b);
 };
-function Jb(a) {
+function Lb(a) {
   var b = 0;
   if (a.constructor === Array) {
     for (var c = 0, d = void 0; c < a.length; c++) {
       (d = a[c]) && (b += d.length);
     }
   } else {
-    for (c = y(a), d = c.next(); !d.done; d = c.next()) {
+    for (c = x(a), d = c.next(); !d.done; d = c.next()) {
       var e = d.value;
       d = e[0];
-      (e = Jb(e[1])) ? b += e : a.delete(d);
+      (e = Lb(e[1])) ? b += e : a.delete(d);
     }
   }
   return b;
 }
-v.cleanup = function() {
+t.cleanup = function() {
   if (!this.fastupdate) {
     return console.info('Cleanup the index isn\'t required when not using "fastupdate".'), this;
   }
-  Jb(this.map);
-  this.depth && Jb(this.ctx);
+  Lb(this.map);
+  this.depth && Lb(this.ctx);
   return this;
 };
-v.searchCache = mb;
-v.export = function(a, b, c, d) {
+t.searchCache = ob;
+t.export = function(a, b, c, d) {
   d = void 0 === d ? 0 : d;
   switch(d) {
     case 0:
       var e = "reg";
-      var g = Ta(this.reg);
+      var g = Va(this.reg);
       break;
     case 1:
       e = "cfg";
@@ -3058,43 +3110,43 @@ v.export = function(a, b, c, d) {
       break;
     case 2:
       e = "map";
-      g = Pa(this.map, this.reg.size);
+      g = Ra(this.map, this.reg.size);
       break;
     case 3:
       e = "ctx";
-      g = Ra(this.ctx, this.reg.size);
+      g = Ta(this.ctx, this.reg.size);
       break;
     default:
       return;
   }
-  return Va.call(this, a, b, e, g, c, d);
+  return Xa.call(this, a, b, e, g, c, d);
 };
-v.import = function(a, b) {
+t.import = function(a, b) {
   if (b) {
-    switch(K(b) && (b = JSON.parse(b)), a = a.split("."), "json" === a[a.length - 1] && a.pop(), a = 1 < a.length ? a[1] : a[0], a) {
+    switch(L(b) && (b = JSON.parse(b)), a = a.split("."), "json" === a[a.length - 1] && a.pop(), a = 1 < a.length ? a[1] : a[0], a) {
       case "reg":
         this.fastupdate = !1;
-        this.reg = Ua(b, this.reg);
+        this.reg = Wa(b, this.reg);
         break;
       case "map":
-        this.map = Qa(b, this.map);
+        this.map = Sa(b, this.map);
         break;
       case "ctx":
-        this.ctx = Sa(b, this.ctx);
+        this.ctx = Ua(b, this.ctx);
     }
   }
 };
-v.serialize = function(a) {
+t.serialize = function(a) {
   a = void 0 === a ? !0 : a;
   if (!this.reg.size) {
     return "";
   }
-  for (var b = "", c = "", d = y(this.reg.keys()), e = d.next(); !e.done; e = d.next()) {
+  for (var b = "", c = "", d = x(this.reg.keys()), e = d.next(); !e.done; e = d.next()) {
     e = e.value, c || (c = typeof e), b += (b ? "," : "") + ("string" === c ? '"' + e + '"' : e);
   }
   b = "index.reg=new Set([" + b + "]);";
   d = "";
-  e = y(this.map.entries());
+  e = x(this.map.entries());
   for (var g = e.next(); !g.done; g = e.next()) {
     var f = g.value;
     g = f[0];
@@ -3112,9 +3164,9 @@ v.serialize = function(a) {
   }
   d = "index.map=new Map([" + d + "]);";
   e = "";
-  g = y(this.ctx.entries());
+  g = x(this.ctx.entries());
   for (f = g.next(); !f.done; f = g.next()) {
-    for (h = f.value, f = h[0], h = y(h[1].entries()), k = h.next(); !k.done; k = h.next()) {
+    for (h = f.value, f = h[0], h = x(h[1].entries()), k = h.next(); !k.done; k = h.next()) {
       l = k.value;
       k = l[0];
       l = l[1];
@@ -3136,12 +3188,12 @@ v.serialize = function(a) {
   e = "index.ctx=new Map([" + e + "]);";
   return a ? "function inject(index){" + b + d + e + "}" : b + d + e;
 };
-Na(O.prototype);
-var Kb = "undefined" !== typeof window && (window.indexedDB || window.mozIndexedDB || window.webkitIndexedDB || window.msIndexedDB), Lb = ["map", "ctx", "tag", "reg", "cfg"];
-function Mb(a, b) {
+Pa(N.prototype);
+var Mb = "undefined" !== typeof window && (window.indexedDB || window.mozIndexedDB || window.webkitIndexedDB || window.msIndexedDB), Nb = ["map", "ctx", "tag", "reg", "cfg"];
+function Ob(a, b) {
   b = void 0 === b ? {} : b;
   if (!this) {
-    return new Mb(a, b);
+    return new Ob(a, b);
   }
   "object" === typeof a && (b = a = a.name);
   a || console.info("Default storage space was used, because a name was not passed.");
@@ -3151,22 +3203,22 @@ function Mb(a, b) {
   this.db = null;
   this.h = {};
 }
-v = Mb.prototype;
-v.mount = function(a) {
+t = Ob.prototype;
+t.mount = function(a) {
   if (!a.encoder) {
     return a.mount(this);
   }
   a.db = this;
   return this.open();
 };
-v.open = function() {
+t.open = function() {
   var a = this;
   navigator.storage && navigator.storage.persist();
   return this.db || new Promise(function(b, c) {
-    var d = Kb.open(a.id + (a.field ? ":" + a.field : ""), 1);
+    var d = Mb.open(a.id + (a.field ? ":" + a.field : ""), 1);
     d.onupgradeneeded = function() {
       var e = a.db = this.result;
-      Lb.forEach(function(g) {
+      Nb.forEach(function(g) {
         e.objectStoreNames.contains(g) || e.createObjectStore(g);
       });
     };
@@ -3187,27 +3239,27 @@ v.open = function() {
     };
   });
 };
-v.close = function() {
+t.close = function() {
   this.db.close();
   this.db = null;
 };
-v.destroy = function() {
-  return Kb.deleteDatabase(this.id + (this.field ? ":" + this.field : ""));
+t.destroy = function() {
+  return Mb.deleteDatabase(this.id + (this.field ? ":" + this.field : ""));
 };
-v.clear = function() {
-  for (var a = this.db.transaction(Lb, "readwrite"), b = 0; b < Lb.length; b++) {
-    a.objectStore(Lb[b]).clear();
+t.clear = function() {
+  for (var a = this.db.transaction(Nb, "readwrite"), b = 0; b < Nb.length; b++) {
+    a.objectStore(Nb[b]).clear();
   }
-  return Nb(a);
+  return Pb(a);
 };
-v.get = function(a, b, c, d, e, g) {
+t.get = function(a, b, c, d, e, g) {
   c = void 0 === c ? 0 : c;
   d = void 0 === d ? 0 : d;
   e = void 0 === e ? !0 : e;
   g = void 0 === g ? !1 : g;
   a = this.db.transaction(b ? "ctx" : "map", "readonly").objectStore(b ? "ctx" : "map").get(b ? b + ":" + a : a);
   var f = this;
-  return Nb(a).then(function(h) {
+  return Pb(a).then(function(h) {
     var k = [];
     if (!h || !h.length) {
       return k;
@@ -3236,13 +3288,13 @@ v.get = function(a, b, c, d, e, g) {
     return h;
   });
 };
-v.tag = function(a, b, c, d) {
+t.tag = function(a, b, c, d) {
   b = void 0 === b ? 0 : b;
   c = void 0 === c ? 0 : c;
   d = void 0 === d ? !1 : d;
   a = this.db.transaction("tag", "readonly").objectStore("tag").get(a);
   var e = this;
-  return Nb(a).then(function(g) {
+  return Pb(a).then(function(g) {
     if (!g || !g.length || c >= g.length) {
       return [];
     }
@@ -3253,10 +3305,10 @@ v.tag = function(a, b, c, d) {
     return d ? e.enrich(g) : g;
   });
 };
-v.enrich = function(a) {
+t.enrich = function(a) {
   "object" !== typeof a && (a = [a]);
   for (var b = this.db.transaction("reg", "readonly").objectStore("reg"), c = [], d = 0; d < a.length; d++) {
-    c[d] = Nb(b.get(a[d]));
+    c[d] = Pb(b.get(a[d]));
   }
   return Promise.all(c).then(function(e) {
     for (var g = 0; g < e.length; g++) {
@@ -3265,14 +3317,14 @@ v.enrich = function(a) {
     return e;
   });
 };
-v.has = function(a) {
+t.has = function(a) {
   a = this.db.transaction("reg", "readonly").objectStore("reg").getKey(a);
-  return Nb(a);
+  return Pb(a);
 };
-v.search = null;
-v.info = function() {
+t.search = null;
+t.info = function() {
 };
-v.transaction = function(a, b, c) {
+t.transaction = function(a, b, c) {
   var d = this, e = this.h[a + ":" + b];
   if (e) {
     return c.call(this, e);
@@ -3293,13 +3345,13 @@ v.transaction = function(a, b, c) {
     return c.call(d, e);
   });
 };
-v.commit = function(a, b, c) {
+t.commit = function(a, b, c) {
   var d = this, e, g, f;
   return ta(function(h) {
     switch(h.h) {
       case 1:
         if (b) {
-          return G(h, d.clear(), 12);
+          return F(h, d.clear(), 12);
         }
         e = a.commit_task;
         a.commit_task = [];
@@ -3316,7 +3368,7 @@ v.commit = function(a, b, c) {
           h.h = 5;
           break;
         }
-        return G(h, d.clear(), 8);
+        return F(h, d.clear(), 8);
       case 8:
         b = !0;
         h.h = 6;
@@ -3335,7 +3387,7 @@ v.commit = function(a, b, c) {
           h.h = 10;
           break;
         }
-        return G(h, d.remove(e), 11);
+        return F(h, d.remove(e), 11);
       case 11:
       case 10:
         h.h = 3;
@@ -3343,26 +3395,26 @@ v.commit = function(a, b, c) {
       case 12:
         a.commit_task = [];
       case 3:
-        return a.reg.size ? G(h, d.transaction("map", "readwrite", function(k) {
-          for (var l = y(a.map), m = l.next(), n = {}; !m.done; n = {O:void 0, Y:void 0}, m = l.next()) {
-            m = m.value, n.Y = m[0], n.O = m[1], n.O.length && (b ? k.put(n.O, n.Y) : k.get(n.Y).onsuccess = function(p) {
+        return a.reg.size ? F(h, d.transaction("map", "readwrite", function(k) {
+          for (var l = x(a.map), m = l.next(), n = {}; !m.done; n = {P:void 0, Y:void 0}, m = l.next()) {
+            m = m.value, n.Y = m[0], n.P = m[1], n.P.length && (b ? k.put(n.P, n.Y) : k.get(n.Y).onsuccess = function(p) {
               return function() {
                 var q = this.result, r;
                 if (q && q.length) {
-                  for (var u = Math.max(q.length, p.O.length), w = 0, x; w < u; w++) {
-                    if ((x = p.O[w]) && x.length) {
-                      if ((r = q[w]) && r.length) {
-                        for (var t = 0; t < x.length; t++) {
-                          r.push(x[t]);
+                  for (var v = Math.max(q.length, p.P.length), y = 0, z; y < v; y++) {
+                    if ((z = p.P[y]) && z.length) {
+                      if ((r = q[y]) && r.length) {
+                        for (var u = 0; u < z.length; u++) {
+                          r.push(z[u]);
                         }
                       } else {
-                        q[w] = x;
+                        q[y] = z;
                       }
                       r = 1;
                     }
                   }
                 } else {
-                  q = p.O, r = 1;
+                  q = p.P, r = 1;
                 }
                 r && k.put(q, p.Y);
               };
@@ -3370,32 +3422,32 @@ v.commit = function(a, b, c) {
           }
         }), 13) : h.return();
       case 13:
-        return G(h, d.transaction("ctx", "readwrite", function(k) {
-          for (var l = y(a.ctx), m = l.next(), n = {}; !m.done; n = {W:void 0}, m = l.next()) {
+        return F(h, d.transaction("ctx", "readwrite", function(k) {
+          for (var l = x(a.ctx), m = l.next(), n = {}; !m.done; n = {W:void 0}, m = l.next()) {
             m = m.value;
             n.W = m[0];
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+            m = x(m[1]);
+            for (var p = m.next(), q = {}; !p.done; q = {R:void 0, Z:void 0}, p = m.next()) {
+              p = p.value, q.Z = p[0], q.R = p[1], q.R.length && (b ? k.put(q.R, n.W + ":" + q.Z) : k.get(n.W + ":" + q.Z).onsuccess = function(r, v) {
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-                        if ((x = w[z]) && x.length) {
-                          for (var B = 0; B < A.length; B++) {
-                            x.push(A[B]);
+                  var y = this.result, z;
+                  if (y && y.length) {
+                    for (var u = Math.max(y.length, r.R.length), w = 0, B; w < u; w++) {
+                      if ((B = r.R[w]) && B.length) {
+                        if ((z = y[w]) && z.length) {
+                          for (var D = 0; D < B.length; D++) {
+                            z.push(B[D]);
                           }
                         } else {
-                          w[z] = A;
+                          y[w] = B;
                         }
-                        x = 1;
+                        z = 1;
                       }
                     }
                   } else {
-                    w = r.P, x = 1;
+                    y = r.R, z = 1;
                   }
-                  x && k.put(w, u.W + ":" + r.Z);
+                  z && k.put(y, v.W + ":" + r.Z);
                 };
               }(q, n));
             }
@@ -3403,8 +3455,8 @@ v.commit = function(a, b, c) {
         }), 14);
       case 14:
         if (a.store) {
-          return G(h, d.transaction("reg", "readwrite", function(k) {
-            for (var l = y(a.store), m = l.next(); !m.done; m = l.next()) {
+          return F(h, d.transaction("reg", "readwrite", function(k) {
+            for (var l = x(a.store), m = l.next(); !m.done; m = l.next()) {
               var n = m.value;
               m = n[0];
               n = n[1];
@@ -3416,8 +3468,8 @@ v.commit = function(a, b, c) {
           h.h = 16;
           break;
         }
-        return G(h, d.transaction("reg", "readwrite", function(k) {
-          for (var l = y(a.reg.keys()), m = l.next(); !m.done; m = l.next()) {
+        return F(h, d.transaction("reg", "readwrite", function(k) {
+          for (var l = x(a.reg.keys()), m = l.next(); !m.done; m = l.next()) {
             k.put(1, m.value);
           }
         }), 16);
@@ -3426,8 +3478,8 @@ v.commit = function(a, b, c) {
           h.h = 20;
           break;
         }
-        return G(h, d.transaction("tag", "readwrite", function(k) {
-          for (var l = y(a.tag), m = l.next(), n = {}; !m.done; n = {X:void 0, ba:void 0}, m = l.next()) {
+        return F(h, d.transaction("tag", "readwrite", function(k) {
+          for (var l = x(a.tag), m = l.next(), n = {}; !m.done; n = {X:void 0, ba:void 0}, m = l.next()) {
             m = m.value, n.ba = m[0], n.X = m[1], n.X.length && (k.get(n.ba).onsuccess = function(p) {
               return function() {
                 var q = this.result;
@@ -3442,7 +3494,7 @@ v.commit = function(a, b, c) {
     }
   });
 };
-function Qb(a, b, c) {
+function Rb(a, b, c) {
   for (var d = a.value, e, g, f = 0, h = 0, k; h < d.length; h++) {
     if (k = c ? d : d[h]) {
       for (var l = 0, m, n; l < b.length; l++) {
@@ -3464,22 +3516,22 @@ function Qb(a, b, c) {
   f ? e && a.update(d) : a.delete();
   a.continue();
 }
-v.remove = function(a) {
+t.remove = function(a) {
   "object" !== typeof a && (a = [a]);
   return Promise.all([this.transaction("map", "readwrite", function(b) {
     b.openCursor().onsuccess = function() {
       var c = this.result;
-      c && Qb(c, a);
+      c && Rb(c, a);
     };
   }), this.transaction("ctx", "readwrite", function(b) {
     b.openCursor().onsuccess = function() {
       var c = this.result;
-      c && Qb(c, a);
+      c && Rb(c, a);
     };
   }), this.transaction("tag", "readwrite", function(b) {
     b.openCursor().onsuccess = function() {
       var c = this.result;
-      c && Qb(c, a, !0);
+      c && Rb(c, a, !0);
     };
   }), this.transaction("reg", "readwrite", function(b) {
     for (var c = 0; c < a.length; c++) {
@@ -3487,7 +3539,7 @@ v.remove = function(a) {
     }
   })]);
 };
-function Nb(a) {
+function Pb(a) {
   return new Promise(function(b, c) {
     a.onsuccess = function() {
       b(this.result);
@@ -3499,8 +3551,8 @@ function Nb(a) {
     a = null;
   });
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-(Tb = Sb.define) && Tb.amd ? Tb([], function() {
-  return Rb;
-}) : "object" === typeof Sb.exports ? Sb.exports = Rb : Sb.FlexSearch = Rb;
+;var Sb = {Index:N, Charset:xb, Encoder:Ha, Document:V, Worker:O, Resolver:Y, IndexedDB:Ob, Language:{}}, Tb = self, Ub;
+(Ub = Tb.define) && Ub.amd ? Ub([], function() {
+  return Sb;
+}) : "object" === typeof Tb.exports ? Tb.exports = Sb : Tb.FlexSearch = Sb;
 }(this||self));
diff --git a/dist/flexsearch.es5.min.js b/dist/flexsearch.es5.min.js
index 83d8cc1..fb97192 100644
--- a/dist/flexsearch.es5.min.js
+++ b/dist/flexsearch.es5.min.js
@@ -5,132 +5,135 @@
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-function Qb(a,b,c){for(var d=a.value,e,h,f=0,g=0,k;g<d.length;g++){if(k=c?d:d[g]){for(var l=0,m,n;l<b.length;l++)if(n=b[l],m=k.indexOf(h?parseInt(n,10):n),0>m&&!h&&"string"===typeof n&&!isNaN(n)&&(m=k.indexOf(parseInt(n,10)))&&(h=1),0<=m)if(e=1,1<k.length)k.splice(m,1);else{d[g]=[];break}f+=k.length}if(c)break}f?e&&a.update(d):a.delete();a.continue()}
-u.remove=function(a){"object"!==typeof a&&(a=[a]);return Promise.all([this.transaction("map","readwrite",function(b){b.openCursor().onsuccess=function(){var c=this.result;c&&Qb(c,a)}}),this.transaction("ctx","readwrite",function(b){b.openCursor().onsuccess=function(){var c=this.result;c&&Qb(c,a)}}),this.transaction("tag","readwrite",function(b){b.openCursor().onsuccess=function(){var c=this.result;c&&Qb(c,a,!0)}}),this.transaction("reg","readwrite",function(b){for(var c=0;c<a.length;c++)b.delete(a[c])})])};
-function Pb(a){return new Promise(function(b,c){a.onsuccess=function(){b(this.result)};a.oncomplete=function(){b(this.result)};a.onerror=c;a=null})};var Rb={Index:O,Charset:vb,Encoder:N,Document:V,Worker:R,Resolver:Y,IndexedDB:Mb,Language:{}},Sb=self,Tb;(Tb=Sb.define)&&Tb.amd?Tb([],function(){return Rb}):"object"===typeof Sb.exports?Sb.exports=Rb:Sb.FlexSearch=Rb;}(this||self));
+function gb(a,b,c,d,e){var h=[],f=K(),g=a.length,k=0;if(d)for(e=g-1;0<=e;e--){d=a[e];var l=d.length;for(g=0;g<l;g++){var m=d[g];if(!f[m])if(f[m]=1,b)b--;else if(h.push(m),h.length===c)return h}}else for(var p=Aa(a),n=0;n<p;n++)for(var q=g-1;0<=q;q--)if(l=(d=a[q][n])&&d.length)for(var r=0;r<l;r++)if(m=d[r],!f[m])if(f[m]=1,b)b--;else{var v=n+(q<g-1?e||0:0);(h[v]||(h[v]=[])).push(m);if(++k===c)return h}return h}
+function hb(a,b){for(var c=K(),d=[],e=0,h;e<b.length;e++){h=b[e];for(var f=0;f<h.length;f++)c[h[f]]=1}for(b=0;b<a.length;b++)e=a[b],1===c[e]&&(d.push(e),c[e]=2);return d};V.prototype.search=function(a,b,c,d){c||(!b&&M(a)?(c=a,a=""):M(b)&&(c=b,b=0));var e=[],h=[],f=0;if(c){c.constructor===Array&&(c={index:c});a=c.query||a;var g=c.pluck;var k=c.merge;var l=g||c.field||c.index;var m=this.tag&&c.tag;var p=this.store&&c.enrich;var n=c.suggest;var q=c.highlight;b=c.limit||b;var r=c.offset||0;b||(b=100);if(m&&(!this.db||!d)){m.constructor!==Array&&(m=[m]);for(var v=[],y=0,z=void 0;y<m.length;y++)if(z=m[y],z.field&&z.tag){var u=z.tag;if(u.constructor===Array)for(var w=0;w<
+u.length;w++)v.push(z.field,u[w]);else v.push(z.field,u)}else{u=Object.keys(z);w=0;for(var A=void 0,D=void 0;w<u.length;w++)if(A=u[w],D=z[A],D.constructor===Array)for(var B=0;B<D.length;B++)v.push(A,D[B]);else v.push(A,D)}m=v;if(!a){h=[];if(v.length)for(g=0;g<v.length;g+=2){n=void 0;if(this.db){n=this.index.get(v[g]);if(!n)continue;h.push(n=n.db.tag(v[g+1],b,r,p))}else n=ib.call(this,v[g],v[g+1],b,r,p);e.push({field:v[g],tag:v[g+1],result:n})}return h.length?Promise.all(h).then(function(P){for(var Q=
+0;Q<P.length;Q++)e[Q].result=P[Q];return e}):e}}L(l)&&(l=[l])}l||(l=this.field);v=!d&&(this.worker||this.db)&&[];y=0;for(w=z=u=void 0;y<l.length;y++)if(z=l[y],!this.db||!this.tag||this.I[y]){u=void 0;L(z)||(u=z,z=u.field,a=u.query||a,b=u.limit||b,r=u.offset||r,n=u.suggest||n,p=this.store&&(u.enrich||p));if(d)u=d[y];else{w=u||c;u=this.index.get(z);if(m){if(this.db){w.tag=m;var R=u.db.support_tag_search;w.field=l}R||(w.enrich=!1)}if(v){v[y]=u.search(a,b,w);w&&p&&(w.enrich=p);continue}else u=u.search(a,
+b,w),w&&p&&(w.enrich=p)}w=u&&u.length;if(m&&w){A=[];D=0;if(this.db&&d){if(!R)for(B=l.length;B<d.length;B++){var F=d[B];if(F&&F.length)D++,A.push(F);else if(!n)return e}}else{B=0;for(var G=F=void 0;B<m.length;B+=2){F=this.tag.get(m[B]);if(!F)if(n)continue;else return e;if(G=(F=F&&F.get(m[B+1]))&&F.length)D++,A.push(F);else if(!n)return e}}if(D){u=hb(u,A);w=u.length;if(!w&&!n)return e;D--}}if(w)h[f]=z,e.push(u),f++;else if(1===l.length)return e}if(v){if(this.db&&m&&m.length&&!R)for(p=0;p<m.length;p+=
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+f.enrich(k):k}return g})};t.tag=function(a,b,c,d){b=void 0===b?0:b;c=void 0===c?0:c;d=void 0===d?!1:d;a=this.db.transaction("tag","readonly").objectStore("tag").get(a);var e=this;return Qb(a).then(function(h){if(!h||!h.length||c>=h.length)return[];if(!b&&!c)return h;h=h.slice(c,c+b);return d?e.enrich(h):h})};
+t.enrich=function(a){"object"!==typeof a&&(a=[a]);for(var b=this.db.transaction("reg","readonly").objectStore("reg"),c=[],d=0;d<a.length;d++)c[d]=Qb(b.get(a[d]));return Promise.all(c).then(function(e){for(var h=0;h<e.length;h++)e[h]={id:a[h],doc:e[h]?JSON.parse(e[h]):null};return e})};t.has=function(a){a=this.db.transaction("reg","readonly").objectStore("reg").getKey(a);return Qb(a)};t.search=null;t.info=function(){};
+t.transaction=function(a,b,c){var d=this,e=this.h[a+":"+b];if(e)return c.call(this,e);var h=this.db.transaction(a,b);this.h[a+":"+b]=e=h.objectStore(a);return new Promise(function(f,g){h.onerror=function(k){d.h[a+":"+b]=null;h.abort();h=e=null;g(k)};h.oncomplete=function(k){h=e=d.h[a+":"+b]=null;f(k||!0)};return c.call(d,e)})};
+t.commit=function(a,b,c){var d=this,e,h,f;return ta(function(g){switch(g.h){case 1:if(b)return H(g,d.clear(),12);e=a.commit_task;a.commit_task=[];h=0;f=void 0;case 4:if(!(h<e.length)){g.h=6;break}f=e[h];if(!f.clear){e[h]=f.oa;g.h=5;break}return H(g,d.clear(),8);case 8:b=!0;g.h=6;break;case 5:h++;g.h=4;break;case 6:if(b){g.h=3;break}c||(e=e.concat(ya(a.reg)));if(!e.length){g.h=10;break}return H(g,d.remove(e),11);case 11:case 10:g.h=3;break;case 12:a.commit_task=[];case 3:return a.reg.size?H(g,d.transaction("map",
+"readwrite",function(k){for(var l=x(a.map),m=l.next(),p={};!m.done;p={P:void 0,Y:void 0},m=l.next())m=m.value,p.Y=m[0],p.P=m[1],p.P.length&&(b?k.put(p.P,p.Y):k.get(p.Y).onsuccess=function(n){return function(){var q=this.result,r;if(q&&q.length)for(var v=Math.max(q.length,n.P.length),y=0,z;y<v;y++){if((z=n.P[y])&&z.length){if((r=q[y])&&r.length)for(var u=0;u<z.length;u++)r.push(z[u]);else q[y]=z;r=1}}else q=n.P,r=1;r&&k.put(q,n.Y)}}(p))}),13):g.return();case 13:return H(g,d.transaction("ctx","readwrite",
+function(k){for(var l=x(a.ctx),m=l.next(),p={};!m.done;p={W:void 0},m=l.next()){m=m.value;p.W=m[0];m=x(m[1]);for(var n=m.next(),q={};!n.done;q={R:void 0,Z:void 0},n=m.next())n=n.value,q.Z=n[0],q.R=n[1],q.R.length&&(b?k.put(q.R,p.W+":"+q.Z):k.get(p.W+":"+q.Z).onsuccess=function(r,v){return function(){var y=this.result,z;if(y&&y.length)for(var u=Math.max(y.length,r.R.length),w=0,A;w<u;w++){if((A=r.R[w])&&A.length){if((z=y[w])&&z.length)for(var D=0;D<A.length;D++)z.push(A[D]);else y[w]=A;z=1}}else y=
+r.R,z=1;z&&k.put(y,v.W+":"+r.Z)}}(q,p))}}),14);case 14:if(a.store)return H(g,d.transaction("reg","readwrite",function(k){for(var l=x(a.store),m=l.next();!m.done;m=l.next()){var p=m.value;m=p[0];p=p[1];k.put("object"===typeof p?JSON.stringify(p):1,m)}}),16);if(a.bypass){g.h=16;break}return H(g,d.transaction("reg","readwrite",function(k){for(var l=x(a.reg.keys()),m=l.next();!m.done;m=l.next())k.put(1,m.value)}),16);case 16:if(!a.tag){g.h=20;break}return H(g,d.transaction("tag","readwrite",function(k){for(var l=
+x(a.tag),m=l.next(),p={};!m.done;p={X:void 0,ba:void 0},m=l.next())m=m.value,p.ba=m[0],p.X=m[1],p.X.length&&(k.get(p.ba).onsuccess=function(n){return function(){var q=this.result;q=q&&q.length?q.concat(n.X):n.X;k.put(q,n.ba)}}(p))}),20);case 20:a.map.clear(),a.ctx.clear(),a.tag&&a.tag.clear(),a.store&&a.store.clear(),a.document||a.reg.clear(),g.h=0}})};
+function Rb(a,b,c){for(var d=a.value,e,h,f=0,g=0,k;g<d.length;g++){if(k=c?d:d[g]){for(var l=0,m,p;l<b.length;l++)if(p=b[l],m=k.indexOf(h?parseInt(p,10):p),0>m&&!h&&"string"===typeof p&&!isNaN(p)&&(m=k.indexOf(parseInt(p,10)))&&(h=1),0<=m)if(e=1,1<k.length)k.splice(m,1);else{d[g]=[];break}f+=k.length}if(c)break}f?e&&a.update(d):a.delete();a.continue()}
+t.remove=function(a){"object"!==typeof a&&(a=[a]);return Promise.all([this.transaction("map","readwrite",function(b){b.openCursor().onsuccess=function(){var c=this.result;c&&Rb(c,a)}}),this.transaction("ctx","readwrite",function(b){b.openCursor().onsuccess=function(){var c=this.result;c&&Rb(c,a)}}),this.transaction("tag","readwrite",function(b){b.openCursor().onsuccess=function(){var c=this.result;c&&Rb(c,a,!0)}}),this.transaction("reg","readwrite",function(b){for(var c=0;c<a.length;c++)b.delete(a[c])})])};
+function Qb(a){return new Promise(function(b,c){a.onsuccess=function(){b(this.result)};a.oncomplete=function(){b(this.result)};a.onerror=c;a=null})};var Sb={Index:N,Charset:xb,Encoder:Ha,Document:V,Worker:O,Resolver:Y,IndexedDB:Ob,Language:{}},Tb=self,Ub;(Ub=Tb.define)&&Ub.amd?Ub([],function(){return Sb}):"object"===typeof Tb.exports?Tb.exports=Sb:Tb.FlexSearch=Sb;}(this||self));
diff --git a/dist/flexsearch.light.debug.js b/dist/flexsearch.light.debug.js
index 11fa5b2..8ca958a 100644
--- a/dist/flexsearch.light.debug.js
+++ b/dist/flexsearch.light.debug.js
@@ -6,7 +6,8 @@
  * https://github.com/nextapps-de/flexsearch
  */
 (function _f(self){'use strict';if(typeof module!=='undefined')self=module;else if(typeof process !== 'undefined')self=process;self._factory=_f;
-function t(a, c, b) {
+var r;
+function u(a, c, b) {
   const d = typeof b, e = typeof a;
   if ("undefined" !== d) {
     if ("undefined" !== e) {
@@ -43,23 +44,24 @@ function t(a, c, b) {
   }
   return "undefined" === e ? c : a;
 }
-function u() {
+function x() {
   return Object.create(null);
 }
-function v(a, c) {
+function y(a, c) {
   return c.length - a.length;
 }
-;const w = /[^\p{L}\p{N}]+/u, x = /(\d{3})/g, y = /(\D)(\d{3})/g, z = /(\d{3})(\D)/g, B = "".normalize && /[\u0300-\u036f]/g;
-function C(a) {
-  if (!this || this.constructor !== C) {
-    return new C(...arguments);
+;const z = /[^\p{L}\p{N}]+/u, A = /(\d{3})/g, B = /(\D)(\d{3})/g, C = /(\d{3})(\D)/g, D = "".normalize && /[\u0300-\u036f]/g;
+function E(a) {
+  if (!this || this.constructor !== E) {
+    return new E(...arguments);
   }
   for (let c = 0; c < arguments.length; c++) {
     this.assign(arguments[c]);
   }
 }
-C.prototype.assign = function(a) {
-  this.normalize = t(a.normalize, !0, this.normalize);
+r = E.prototype;
+r.assign = function(a) {
+  this.normalize = u(a.normalize, !0, this.normalize);
   let c = a.include, b = c || a.exclude || a.split;
   if ("object" === typeof b) {
     let d = !c, e = "";
@@ -80,55 +82,106 @@ C.prototype.assign = function(a) {
     this.numeric = d;
   } else {
     try {
-      this.split = t(b, w, this.split);
+      this.split = u(b, z, this.split);
     } catch (d) {
       this.split = /\s+/;
     }
-    this.numeric = t(this.numeric, !0);
+    this.numeric = u(this.numeric, !0);
   }
-  this.prepare = t(a.prepare, null, this.prepare);
-  this.finalize = t(a.finalize, null, this.finalize);
+  this.prepare = u(a.prepare, null, this.prepare);
+  this.finalize = u(a.finalize, null, this.finalize);
   this.rtl = a.rtl || !1;
-  this.dedupe = t(a.dedupe, !0, this.dedupe);
-  this.filter = t((b = a.filter) && new Set(b), null, this.filter);
-  this.matcher = t((b = a.matcher) && new Map(b), null, this.matcher);
-  this.mapper = t((b = a.mapper) && new Map(b), null, this.mapper);
-  this.stemmer = t((b = a.stemmer) && new Map(b), null, this.stemmer);
-  this.replacer = t(a.replacer, null, this.replacer);
-  this.minlength = t(a.minlength, 1, this.minlength);
-  this.maxlength = t(a.maxlength, 0, this.maxlength);
-  if (this.cache = b = t(a.cache, !0, this.cache)) {
-    this.j = null, this.v = "number" === typeof b ? b : 2e5, this.h = new Map(), this.i = new Map(), this.l = this.g = 128;
+  this.dedupe = u(a.dedupe, !0, this.dedupe);
+  this.filter = u((b = a.filter) && new Set(b), null, this.filter);
+  this.matcher = u((b = a.matcher) && new Map(b), null, this.matcher);
+  this.mapper = u((b = a.mapper) && new Map(b), null, this.mapper);
+  this.stemmer = u((b = a.stemmer) && new Map(b), null, this.stemmer);
+  this.replacer = u(a.replacer, null, this.replacer);
+  this.minlength = u(a.minlength, 1, this.minlength);
+  this.maxlength = u(a.maxlength, 0, this.maxlength);
+  if (this.cache = b = u(a.cache, !0, this.cache)) {
+    this.l = null, this.v = "number" === typeof b ? b : 2e5, this.h = new Map(), this.j = new Map(), this.o = this.m = 128;
   }
-  this.m = "";
+  this.g = "";
   this.s = null;
-  this.o = "";
+  this.i = "";
   this.u = null;
   if (this.matcher) {
     for (const d of this.matcher.keys()) {
-      this.m += (this.m ? "|" : "") + d;
+      this.g += (this.g ? "|" : "") + d;
     }
   }
   if (this.stemmer) {
     for (const d of this.stemmer.keys()) {
-      this.o += (this.o ? "|" : "") + d;
+      this.i += (this.i ? "|" : "") + d;
     }
   }
   return this;
 };
-C.prototype.encode = function(a) {
-  if (this.cache && a.length <= this.g) {
-    if (this.j) {
+r.addMatcher = function(a, c) {
+  if ("object" === typeof a) {
+    return this.addReplacer(a, c);
+  }
+  if (2 > a.length) {
+    return this.addMapper(a, c);
+  }
+  this.matcher || (this.matcher = new Map());
+  this.matcher.set(a, c);
+  this.g += (this.g ? "|" : "") + a;
+  this.s = null;
+  this.cache && F(this);
+  return this;
+};
+r.addStemmer = function(a, c) {
+  this.stemmer || (this.stemmer = new Map());
+  this.stemmer.set(a, c);
+  this.i += (this.i ? "|" : "") + a;
+  this.u = null;
+  this.cache && F(this);
+  return this;
+};
+r.addFilter = function(a) {
+  this.filter || (this.filter = new Set());
+  this.filter.add(a);
+  this.cache && F(this);
+  return this;
+};
+r.addMapper = function(a, c) {
+  if ("object" === typeof a) {
+    return this.addReplacer(a, c);
+  }
+  if (1 < a.length) {
+    return this.addMatcher(a, c);
+  }
+  this.mapper || (this.mapper = new Map());
+  this.mapper.set(a, c);
+  this.cache && F(this);
+  return this;
+};
+r.addReplacer = function(a, c) {
+  "string" === typeof a && (a = new RegExp(a, "g"));
+  this.replacer || (this.replacer = []);
+  this.replacer.push(a, c || "");
+  this.cache && F(this);
+  return this;
+};
+function F(a) {
+  a.h.clear();
+  a.j.clear();
+}
+r.encode = function(a) {
+  if (this.cache && a.length <= this.m) {
+    if (this.l) {
       if (this.h.has(a)) {
         return this.h.get(a);
       }
     } else {
-      this.j = setTimeout(D, 50, this);
+      this.l = setTimeout(G, 50, this);
     }
   }
-  this.normalize && (a = "function" === typeof this.normalize ? this.normalize(a) : B ? a.normalize("NFKD").replace(B, "").toLowerCase() : a.toLowerCase());
+  this.normalize && (a = "function" === typeof this.normalize ? this.normalize(a) : D ? a.normalize("NFKD").replace(D, "").toLowerCase() : a.toLowerCase());
   this.prepare && (a = this.prepare(a));
-  this.numeric && 3 < a.length && (a = a.replace(y, "$1 $2").replace(z, "$1 $2").replace(x, "$1 "));
+  this.numeric && 3 < a.length && (a = a.replace(B, "$1 $2").replace(C, "$1 $2").replace(A, "$1 "));
   const c = !(this.dedupe || this.mapper || this.filter || this.matcher || this.stemmer || this.replacer);
   let b = [], d = this.split || "" === this.split ? a.split(this.split) : a;
   for (let g = 0, f, h; g < d.length; g++) {
@@ -145,95 +198,95 @@ C.prototype.encode = function(a) {
     if (this.filter && this.filter.has(f)) {
       continue;
     }
-    if (this.cache && f.length <= this.l) {
-      if (this.j) {
-        var e = this.i.get(f);
+    if (this.cache && f.length <= this.o) {
+      if (this.l) {
+        var e = this.j.get(f);
         if (e || "" === e) {
           e && b.push(e);
           continue;
         }
       } else {
-        this.j = setTimeout(D, 50, this);
+        this.l = setTimeout(G, 50, this);
       }
     }
     let k;
-    this.stemmer && 2 < f.length && (this.u || (this.u = new RegExp("(?!^)(" + this.o + ")$")), f = f.replace(this.u, p => this.stemmer.get(p)), k = 1);
+    this.stemmer && 2 < f.length && (this.u || (this.u = new RegExp("(?!^)(" + this.i + ")$")), f = f.replace(this.u, l => this.stemmer.get(l)), k = 1);
     f && k && (f.length < this.minlength || this.filter && this.filter.has(f)) && (f = "");
     if (f && (this.mapper || this.dedupe && 1 < f.length)) {
       e = "";
-      for (let p = 0, q = "", m, r; p < f.length; p++) {
-        m = f.charAt(p), m === q && this.dedupe || ((r = this.mapper && this.mapper.get(m)) || "" === r ? r === q && this.dedupe || !(q = r) || (e += r) : e += q = m);
+      for (let l = 0, t = "", q, n; l < f.length; l++) {
+        q = f.charAt(l), q === t && this.dedupe || ((n = this.mapper && this.mapper.get(q)) || "" === n ? n === t && this.dedupe || !(t = n) || (e += n) : e += t = q);
       }
       f = e;
     }
-    this.matcher && 1 < f.length && (this.s || (this.s = new RegExp("(" + this.m + ")", "g")), f = f.replace(this.s, p => this.matcher.get(p)));
+    this.matcher && 1 < f.length && (this.s || (this.s = new RegExp("(" + this.g + ")", "g")), f = f.replace(this.s, l => this.matcher.get(l)));
     if (f && this.replacer) {
       for (e = 0; f && e < this.replacer.length; e += 2) {
         f = f.replace(this.replacer[e], this.replacer[e + 1]);
       }
     }
-    this.cache && h.length <= this.l && (this.i.set(h, f), this.i.size > this.v && (this.i.clear(), this.l = this.l / 1.1 | 0));
+    this.cache && h.length <= this.o && (this.j.set(h, f), this.j.size > this.v && (this.j.clear(), this.o = this.o / 1.1 | 0));
     f && b.push(f);
   }
   this.finalize && (b = this.finalize(b) || b);
-  this.cache && a.length <= this.g && (this.h.set(a, b), this.h.size > this.v && (this.h.clear(), this.g = this.g / 1.1 | 0));
+  this.cache && a.length <= this.m && (this.h.set(a, b), this.h.size > this.v && (this.h.clear(), this.m = this.m / 1.1 | 0));
   return b;
 };
-function D(a) {
-  a.j = null;
+function G(a) {
+  a.l = null;
   a.h.clear();
-  a.i.clear();
+  a.j.clear();
 }
-;function E(a) {
+;function H(a) {
   this.limit = a && !0 !== a ? a : 1000;
   this.cache = new Map();
   this.g = "";
 }
-E.prototype.set = function(a, c) {
+H.prototype.set = function(a, c) {
   this.cache.set(this.g = a, c);
   this.cache.size > this.limit && this.cache.delete(this.cache.keys().next().value);
 };
-E.prototype.get = function(a) {
+H.prototype.get = function(a) {
   const c = this.cache.get(a);
   c && this.g !== a && (this.cache.delete(a), this.cache.set(this.g = a, c));
   return c;
 };
-E.prototype.remove = function(a) {
+H.prototype.remove = function(a) {
   for (const c of this.cache) {
     const b = c[0];
     c[1].includes(a) && this.cache.delete(b);
   }
 };
-E.prototype.clear = function() {
+H.prototype.clear = function() {
   this.cache.clear();
   this.g = "";
 };
-const F = {normalize:function(a) {
+const I = {normalize:function(a) {
   return a.toLowerCase();
 }, dedupe:!1};
-const G = {memory:{resolution:1}, performance:{resolution:6, fastupdate:!0, context:{depth:1, resolution:3}}, match:{tokenize:"forward"}, score:{resolution:9, context:{depth:2, resolution:9}}};
-u();
-H.prototype.add = function(a, c, b, d) {
+const J = {memory:{resolution:1}, performance:{resolution:6, fastupdate:!0, context:{depth:1, resolution:3}}, match:{tokenize:"forward"}, score:{resolution:9, context:{depth:2, resolution:9}}};
+x();
+K.prototype.add = function(a, c, b, d) {
   if (c && (a || 0 === a)) {
     if (!d && !b && this.reg.has(a)) {
       return this.update(a, c);
     }
     c = this.encoder.encode(c);
     if (d = c.length) {
-      const p = u(), q = u(), m = this.depth, r = this.resolution;
-      for (let l = 0; l < d; l++) {
-        let n = c[this.rtl ? d - 1 - l : l];
-        var e = n.length;
-        if (e && (m || !q[n])) {
-          var g = this.score ? this.score(c, n, l, null, 0) : I(r, d, l), f = "";
+      const l = x(), t = x(), q = this.depth, n = this.resolution;
+      for (let m = 0; m < d; m++) {
+        let p = c[this.rtl ? d - 1 - m : m];
+        var e = p.length;
+        if (e && (q || !t[p])) {
+          var g = this.score ? this.score(c, p, m, null, 0) : L(n, d, m), f = "";
           switch(this.tokenize) {
             case "full":
               if (2 < e) {
                 for (g = 0; g < e; g++) {
                   for (var h = e; h > g; h--) {
-                    f = n.substring(g, h);
-                    var k = this.score ? this.score(c, n, l, f, g) : I(r, d, l, e, g);
-                    J(this, q, f, k, a, b);
+                    f = p.substring(g, h);
+                    var k = this.score ? this.score(c, p, m, f, g) : L(n, d, m, e, g);
+                    M(this, t, f, k, a, b);
                   }
                 }
                 break;
@@ -241,24 +294,24 @@ H.prototype.add = function(a, c, b, d) {
             case "reverse":
               if (1 < e) {
                 for (h = e - 1; 0 < h; h--) {
-                  f = n[h] + f, k = this.score ? this.score(c, n, l, f, h) : I(r, d, l, e, h), J(this, q, f, k, a, b);
+                  f = p[h] + f, k = this.score ? this.score(c, p, m, f, h) : L(n, d, m, e, h), M(this, t, f, k, a, b);
                 }
                 f = "";
               }
             case "forward":
               if (1 < e) {
                 for (h = 0; h < e; h++) {
-                  f += n[h], J(this, q, f, g, a, b);
+                  f += p[h], M(this, t, f, g, a, b);
                 }
                 break;
               }
             default:
-              if (J(this, q, n, g, a, b), m && 1 < d && l < d - 1) {
-                for (e = u(), f = this.A, g = n, h = Math.min(m + 1, d - l), e[g] = 1, k = 1; k < h; k++) {
-                  if ((n = c[this.rtl ? d - 1 - l - k : l + k]) && !e[n]) {
-                    e[n] = 1;
-                    const A = this.score ? this.score(c, g, l, n, k) : I(f + (d / 2 > f ? 0 : 1), d, l, h - 1, k - 1), L = this.bidirectional && n > g;
-                    J(this, p, L ? g : n, A, a, b, L ? n : g);
+              if (M(this, t, p, g, a, b), q && 1 < d && m < d - 1) {
+                for (e = x(), f = this.A, g = p, h = Math.min(q + 1, d - m), e[g] = 1, k = 1; k < h; k++) {
+                  if ((p = c[this.rtl ? d - 1 - m - k : m + k]) && !e[p]) {
+                    e[p] = 1;
+                    const v = this.score ? this.score(c, g, m, p, k) : L(f + (d / 2 > f ? 0 : 1), d, m, h - 1, k - 1), w = this.bidirectional && p > g;
+                    M(this, l, w ? g : p, v, a, b, w ? p : g);
                   }
                 }
               }
@@ -270,16 +323,16 @@ H.prototype.add = function(a, c, b, d) {
   }
   return this;
 };
-function J(a, c, b, d, e, g, f) {
+function M(a, c, b, d, e, g, f) {
   let h = f ? a.ctx : a.map, k;
   if (!c[b] || f && !(k = c[b])[f]) {
-    f ? (c = k || (c[b] = u()), c[f] = 1, (k = h.get(f)) ? h = k : h.set(f, h = new Map())) : c[b] = 1, (k = h.get(b)) ? h = k : h.set(b, h = []), h = h[d] || (h[d] = []), g && h.includes(e) || (h.push(e), a.fastupdate && ((c = a.reg.get(e)) ? c.push(h) : a.reg.set(e, [h])));
+    f ? (c = k || (c[b] = x()), c[f] = 1, (k = h.get(f)) ? h = k : h.set(f, h = new Map())) : c[b] = 1, (k = h.get(b)) ? h = k : h.set(b, h = []), h = h[d] || (h[d] = []), g && h.includes(e) || (h.push(e), a.fastupdate && ((c = a.reg.get(e)) ? c.push(h) : a.reg.set(e, [h])));
   }
 }
-function I(a, c, b, d, e) {
+function L(a, c, b, d, e) {
   return b && 1 < a ? c + (d || 0) <= a ? b + (e || 0) : (a - 1) / (c + (d || 0)) * (b + (e || 0)) + 1 | 0 : 0;
 }
-;function K(a, c, b) {
+;function N(a, c, b) {
   if (1 === a.length) {
     return a = a[0], a = b || a.length > c ? c ? a.slice(b, b + c) : a.slice(b) : a;
   }
@@ -309,7 +362,7 @@ function I(a, c, b, d, e) {
   }
   return d.length ? d = 1 < d.length ? [].concat.apply([], d) : d[0] : d;
 }
-;H.prototype.search = function(a, c, b) {
+;K.prototype.search = function(a, c, b) {
   b || (c || "object" !== typeof a ? "object" === typeof c && (b = c, c = 0) : (b = a, a = ""));
   var d = [], e = 0;
   if (b) {
@@ -318,102 +371,104 @@ function I(a, c, b, d, e) {
     e = b.offset || 0;
     var g = b.context;
     var f = b.suggest;
+    var h = !0;
+    var k = b.resolution;
+  } else {
+    h = !0;
   }
-  a = this.encoder.encode(a);
-  b = a.length;
-  c || (c = 100);
+  var l = this.encoder.encode(a);
+  b = l.length;
+  c || !h || (c = 100);
   if (1 === b) {
-    return M.call(this, a[0], "", c, e);
+    return O.call(this, l[0], "", c, e);
   }
   g = this.depth && !1 !== g;
   if (2 === b && g && !f) {
-    return M.call(this, a[0], a[1], c, e);
+    return O.call(this, l[0], l[1], c, e);
   }
-  var h = 0, k = 0;
+  let t = h = 0;
   if (1 < b) {
-    var p = u();
-    const m = [];
-    for (let r = 0, l; r < b; r++) {
-      if ((l = a[r]) && !p[l]) {
-        if (f || N(this, l)) {
-          m.push(l), p[l] = 1;
+    const n = x(), m = [];
+    for (let p = 0, v; p < b; p++) {
+      if ((v = l[p]) && !n[v]) {
+        if (f || P(this, v)) {
+          m.push(v), n[v] = 1;
         } else {
           return d;
         }
-        const n = l.length;
-        h = Math.max(h, n);
-        k = k ? Math.min(k, n) : n;
+        const w = v.length;
+        h = Math.max(h, w);
+        t = t ? Math.min(t, w) : w;
       }
     }
-    a = m;
+    l = m;
     b = a.length;
   }
   if (!b) {
     return d;
   }
-  p = 0;
+  a = 0;
   if (1 === b) {
-    return M.call(this, a[0], "", c, e);
+    return O.call(this, l[0], "", c, e);
   }
   if (2 === b && g && !f) {
-    return M.call(this, a[0], a[1], c, e);
+    return O.call(this, l[0], l[1], c, e);
   }
   if (1 < b) {
     if (g) {
-      var q = a[0];
-      p = 1;
+      var q = l[0];
+      a = 1;
     } else {
-      9 < h && 3 < h / k && a.sort(v);
+      9 < h && 3 < h / t && l.sort(y);
     }
   }
-  for (let m, r; p < b; p++) {
-    r = a[p];
-    q ? (m = N(this, r, q), m = O(m, d, f, this.A), f && !1 === m && d.length || (q = r)) : (m = N(this, r, ""), m = O(m, d, f, this.resolution));
-    if (m) {
-      return m;
+  k || 0 === k || (k = this.resolution);
+  for (let n, m; a < b; a++) {
+    m = l[a];
+    q ? (n = P(this, m, q), n = Q(n, d, f, this.A), f && !1 === n && d.length || (q = m)) : (n = P(this, m, ""), n = Q(n, d, f, k));
+    if (n) {
+      return n;
     }
-    if (f && p === b - 1) {
+    if (f && a === b - 1) {
       g = d.length;
       if (!g) {
         if (q) {
           q = "";
-          p = -1;
+          a = -1;
           continue;
         }
         return d;
       }
       if (1 === g) {
-        return K(d[0], c, e);
+        return N(d[0], c, e);
       }
     }
   }
   a: {
-    a = d;
-    d = this.resolution;
     q = f;
-    b = a.length;
+    b = d.length;
     f = [];
-    g = u();
-    for (let m = 0, r, l, n, A; m < d; m++) {
-      for (k = 0; k < b; k++) {
-        if (n = a[k], m < n.length && (r = n[m])) {
-          for (p = 0; p < r.length; p++) {
-            l = r[p], (h = g[l]) ? g[l]++ : (h = 0, g[l] = 1), A = f[h] || (f[h] = []), A.push(l);
+    g = x();
+    for (let n = 0, m, p, v, w; n < k; n++) {
+      for (a = 0; a < b; a++) {
+        if (v = d[a], n < v.length && (m = v[n])) {
+          for (h = 0; h < m.length; h++) {
+            p = m[h], (l = g[p]) ? g[p]++ : (l = 0, g[p] = 1), w = f[l] || (f[l] = []), w.push(p);
           }
         }
       }
     }
-    if (a = f.length) {
+    if (k = f.length) {
       if (q) {
         if (1 < f.length) {
           b: {
-            for (a = [], d = u(), q = f.length, h = q - 1; 0 <= h; h--) {
-              for (q = f[h], g = q.length, k = 0; k < g; k++) {
-                if (b = q[k], !d[b]) {
+            for (k = [], d = x(), q = f.length, l = q - 1; 0 <= l; l--) {
+              for (q = f[l], g = q.length, a = 0; a < g; a++) {
+                if (b = q[a], !d[b]) {
                   if (d[b] = 1, e) {
                     e--;
                   } else {
-                    if (a.push(b), a.length === c) {
+                    if (k.push(b), k.length === c) {
                       break b;
                     }
                   }
@@ -422,15 +477,15 @@ function I(a, c, b, d, e) {
             }
           }
         } else {
-          a = (f = f[0]).length > c || e ? f.slice(e, c + e) : f;
+          k = (f = f[0]).length > c || e ? f.slice(e, c + e) : f;
         }
-        f = a;
+        f = k;
       } else {
-        if (a < b) {
+        if (k < b) {
           d = [];
           break a;
         }
-        f = f[a - 1];
+        f = f[k - 1];
         if (c || e) {
           if (f.length > c || e) {
             f = f.slice(e, c + e);
@@ -442,10 +497,10 @@ function I(a, c, b, d, e) {
   }
   return d;
 };
-function M(a, c, b, d) {
-  return (a = N(this, a, c)) && a.length ? K(a, b, d) : [];
-}
 function O(a, c, b, d) {
+  return (a = P(this, a, c)) && a.length ? N(a, b, d) : [];
+}
+function Q(a, c, b, d) {
   let e = [];
   if (a) {
     d = Math.min(a.length, d);
@@ -459,13 +514,13 @@ function O(a, c, b, d) {
   }
   return !b && e;
 }
-function N(a, c, b) {
+function P(a, c, b) {
   let d;
   b && (d = a.bidirectional && c > b);
   a = b ? (a = a.ctx.get(d ? c : b)) && a.get(d ? b : c) : a.map.get(c);
   return a;
 }
-;H.prototype.remove = function(a, c) {
+;K.prototype.remove = function(a, c) {
   const b = this.reg.size && (this.fastupdate ? this.reg.get(a) : this.reg.has(a));
   if (b) {
     if (this.fastupdate) {
@@ -480,14 +535,14 @@ function N(a, c, b) {
         }
       }
     } else {
-      P(this.map, a), this.depth && P(this.ctx, a);
+      R(this.map, a), this.depth && R(this.ctx, a);
     }
     c || this.reg.delete(a);
   }
   this.cache && this.cache.remove(a);
   return this;
 };
-function P(a, c) {
+function R(a, c) {
   let b = 0;
   if (a.constructor === Array) {
     for (let d = 0, e, g; d < a.length; d++) {
@@ -502,58 +557,58 @@ function P(a, c) {
     }
   } else {
     for (let d of a) {
-      const e = d[0], g = P(d[1], c);
+      const e = d[0], g = R(d[1], c);
       g ? b += g : a.delete(e);
     }
   }
   return b;
 }
-;function H(a, c) {
-  if (!this || this.constructor !== H) {
-    return new H(a);
+;function K(a, c) {
+  if (!this || this.constructor !== K) {
+    return new K(a);
   }
   if (a) {
     var b = "string" === typeof a ? a : a.preset;
-    b && (G[b] || console.warn("Preset not found: " + b), a = Object.assign({}, G[b], a));
+    b && (J[b] || console.warn("Preset not found: " + b), a = Object.assign({}, J[b], a));
   } else {
     a = {};
   }
-  b = a.context || {};
-  const d = a.encode || a.encoder || F;
-  this.encoder = d.encode ? d : "object" === typeof d ? new C(d) : {encode:d};
-  let e;
+  b = a.context;
+  const d = !0 === b ? {depth:1} : b || {}, e = a.encode || a.encoder || I;
+  this.encoder = e.encode ? e : "object" === typeof e ? new E(e) : {encode:e};
   this.resolution = a.resolution || 9;
-  this.tokenize = e = a.tokenize || "strict";
-  this.depth = "strict" === e && b.depth || 0;
-  this.bidirectional = !1 !== b.bidirectional;
+  this.tokenize = b = a.tokenize || "strict";
+  this.depth = "strict" === b && d.depth || 0;
+  this.bidirectional = !1 !== d.bidirectional;
   this.fastupdate = !!a.fastupdate;
   this.score = a.score || null;
-  e = !1;
+  b = !1;
   this.map = new Map();
   this.ctx = new Map();
   this.reg = c || (this.fastupdate ? new Map() : new Set());
-  this.A = b.resolution || 1;
-  this.rtl = d.rtl || a.rtl || !1;
-  this.cache = (e = a.cache || null) && new E(e);
+  this.A = d.resolution || 3;
+  this.rtl = e.rtl || a.rtl || !1;
+  this.cache = (b = a.cache || null) && new H(b);
 }
-H.prototype.clear = function() {
+r = K.prototype;
+r.clear = function() {
   this.map.clear();
   this.ctx.clear();
   this.reg.clear();
   this.cache && this.cache.clear();
   return this;
 };
-H.prototype.append = function(a, c) {
+r.append = function(a, c) {
   return this.add(a, c, !0);
 };
-H.prototype.contain = function(a) {
+r.contain = function(a) {
   return this.reg.has(a);
 };
-H.prototype.update = function(a, c) {
+r.update = function(a, c) {
   const b = this, d = this.remove(a);
   return d && d.then ? d.then(() => b.add(a, c)) : this.add(a, c);
 };
-function Q(a) {
+function S(a) {
   let c = 0;
   if (a.constructor === Array) {
     for (let b = 0, d; b < a.length; b++) {
@@ -561,21 +616,21 @@ function Q(a) {
     }
   } else {
     for (const b of a) {
-      const d = b[0], e = Q(b[1]);
+      const d = b[0], e = S(b[1]);
       e ? c += e : a.delete(d);
     }
   }
   return c;
 }
-H.prototype.cleanup = function() {
+r.cleanup = function() {
   if (!this.fastupdate) {
     return console.info('Cleanup the index isn\'t required when not using "fastupdate".'), this;
   }
-  Q(this.map);
-  this.depth && Q(this.ctx);
+  S(this.map);
+  this.depth && S(this.ctx);
   return this;
 };
-H.prototype.searchCache = function(a, c, b) {
+r.searchCache = function(a, c, b) {
   a = ("object" === typeof a ? "" + a.query : a).toLowerCase();
   let d = this.cache.get(a);
   if (!d) {
@@ -591,9 +646,9 @@ H.prototype.searchCache = function(a, c, b) {
   }
   return d;
 };
-const R = {Index:H, Charset:null, Encoder:C, Document:null, Worker:null, Resolver:null, IndexedDB:null, Language:{}}, S = self;
-let T;
-(T = S.define) && T.amd ? T([], function() {
-  return R;
-}) : "object" === typeof S.exports ? S.exports = R : S.FlexSearch = R;
+const T = {Index:K, Charset:null, Encoder:E, Document:null, Worker:null, Resolver:null, IndexedDB:null, Language:{}}, U = self;
+let V;
+(V = U.define) && V.amd ? V([], function() {
+  return T;
+}) : "object" === typeof U.exports ? U.exports = T : U.FlexSearch = T;
 }(this||self));
diff --git a/dist/flexsearch.light.min.js b/dist/flexsearch.light.min.js
index 4d21403..a1155a1 100644
--- a/dist/flexsearch.light.min.js
+++ b/dist/flexsearch.light.min.js
@@ -5,21 +5,23 @@
  * Hosted by Nextapps GmbH
  * https://github.com/nextapps-de/flexsearch
  */
-(function _f(self){'use strict';if(typeof module!=='undefined')self=module;else if(typeof process !== 'undefined')self=process;self._factory=_f;function t(a,c,b){const d=typeof b,e=typeof a;if("undefined"!==d){if("undefined"!==e){if(b){if("function"===e&&d===e)return function(h){return a(b(h))};c=a.constructor;if(c===b.constructor){if(c===Array)return b.concat(a);if(c===Map){var g=new Map(b);for(var f of a)g.set(f[0],f[1]);return g}if(c===Set){f=new Set(b);for(g of a.values())f.add(g);return f}}}return a}return b}return"undefined"===e?c:a}function u(){return Object.create(null)}function v(a,c){return c.length-a.length};const w=/[^\p{L}\p{N}]+/u,x=/(\d{3})/g,y=/(\D)(\d{3})/g,z=/(\d{3})(\D)/g,B="".normalize&&/[\u0300-\u036f]/g;function C(a){if(!this||this.constructor!==C)return new C(...arguments);for(let c=0;c<arguments.length;c++)this.assign(arguments[c])}
-C.prototype.assign=function(a){this.normalize=t(a.normalize,!0,this.normalize);let c=a.include,b=c||a.exclude||a.split;if("object"===typeof b){let d=!c,e="";a.include||(e+="\\p{Z}");b.letter&&(e+="\\p{L}");b.number&&(e+="\\p{N}",d=!!c);b.symbol&&(e+="\\p{S}");b.punctuation&&(e+="\\p{P}");b.control&&(e+="\\p{C}");if(b=b.char)e+="object"===typeof b?b.join(""):b;try{this.split=new RegExp("["+(c?"^":"")+e+"]+","u")}catch(g){this.split=/\s+/}this.numeric=d}else{try{this.split=t(b,w,this.split)}catch(d){this.split=
-/\s+/}this.numeric=t(this.numeric,!0)}this.prepare=t(a.prepare,null,this.prepare);this.finalize=t(a.finalize,null,this.finalize);this.rtl=a.rtl||!1;this.dedupe=t(a.dedupe,!0,this.dedupe);this.filter=t((b=a.filter)&&new Set(b),null,this.filter);this.matcher=t((b=a.matcher)&&new Map(b),null,this.matcher);this.mapper=t((b=a.mapper)&&new Map(b),null,this.mapper);this.stemmer=t((b=a.stemmer)&&new Map(b),null,this.stemmer);this.replacer=t(a.replacer,null,this.replacer);this.minlength=t(a.minlength,1,this.minlength);
-this.maxlength=t(a.maxlength,0,this.maxlength);if(this.cache=b=t(a.cache,!0,this.cache))this.j=null,this.v="number"===typeof b?b:2E5,this.h=new Map,this.i=new Map,this.l=this.g=128;this.m="";this.s=null;this.o="";this.u=null;if(this.matcher)for(const d of this.matcher.keys())this.m+=(this.m?"|":"")+d;if(this.stemmer)for(const d of this.stemmer.keys())this.o+=(this.o?"|":"")+d;return this};
-C.prototype.encode=function(a){if(this.cache&&a.length<=this.g)if(this.j){if(this.h.has(a))return this.h.get(a)}else this.j=setTimeout(D,50,this);this.normalize&&(a="function"===typeof this.normalize?this.normalize(a):B?a.normalize("NFKD").replace(B,"").toLowerCase():a.toLowerCase());this.prepare&&(a=this.prepare(a));this.numeric&&3<a.length&&(a=a.replace(y,"$1 $2").replace(z,"$1 $2").replace(x,"$1 "));const c=!(this.dedupe||this.mapper||this.filter||this.matcher||this.stemmer||this.replacer);let b=
-[],d=this.split||""===this.split?a.split(this.split):a;for(let g=0,f,h;g<d.length;g++){if(!(f=h=d[g]))continue;if(f.length<this.minlength)continue;if(c){b.push(f);continue}if(this.filter&&this.filter.has(f))continue;if(this.cache&&f.length<=this.l)if(this.j){var e=this.i.get(f);if(e||""===e){e&&b.push(e);continue}}else this.j=setTimeout(D,50,this);let k;this.stemmer&&2<f.length&&(this.u||(this.u=new RegExp("(?!^)("+this.o+")$")),f=f.replace(this.u,p=>this.stemmer.get(p)),k=1);f&&k&&(f.length<this.minlength||
-this.filter&&this.filter.has(f))&&(f="");if(f&&(this.mapper||this.dedupe&&1<f.length)){e="";for(let p=0,q="",m,r;p<f.length;p++)m=f.charAt(p),m===q&&this.dedupe||((r=this.mapper&&this.mapper.get(m))||""===r?r===q&&this.dedupe||!(q=r)||(e+=r):e+=q=m);f=e}this.matcher&&1<f.length&&(this.s||(this.s=new RegExp("("+this.m+")","g")),f=f.replace(this.s,p=>this.matcher.get(p)));if(f&&this.replacer)for(e=0;f&&e<this.replacer.length;e+=2)f=f.replace(this.replacer[e],this.replacer[e+1]);this.cache&&h.length<=
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+function M(a,c,b,d,e,g,f){let h=f?a.ctx:a.map,k;if(!c[b]||f&&!(k=c[b])[f])f?(c=k||(c[b]=x()),c[f]=1,(k=h.get(f))?h=k:h.set(f,h=new Map)):c[b]=1,(k=h.get(b))?h=k:h.set(b,h=[]),h=h[d]||(h[d]=[]),g&&h.includes(e)||(h.push(e),a.fastupdate&&((c=a.reg.get(e))?c.push(h):a.reg.set(e,[h])))}function L(a,c,b,d,e){return b&&1<a?c+(d||0)<=a?b+(e||0):(a-1)/(c+(d||0))*(b+(e||0))+1|0:0};function N(a,c,b){if(1===a.length)return a=a[0],a=b||a.length>c?c?a.slice(b,b+c):a.slice(b):a;let d=[];for(let e=0,g,f;e<a.length;e++)if((g=a[e])&&(f=g.length)){if(b){if(b>=f){b-=f;continue}b<f&&(g=c?g.slice(b,b+c):g.slice(b),f=g.length,b=0)}if(d.length)f>c&&(g=g.slice(0,c),f=g.length),d.push(g);else{if(f>=c)return f>c&&(g=g.slice(0,c)),g;d=[g]}c-=f;if(!c)break}return d.length?d=1<d.length?[].concat.apply([],d):d[0]:d};K.prototype.search=function(a,c,b){b||(c||"object"!==typeof a?"object"===typeof c&&(b=c,c=0):(b=a,a=""));var d=[],e=0;if(b){a=b.query||a;c=b.limit||c;e=b.offset||0;var g=b.context;var f=b.suggest;var h=!0;var k=b.resolution}else h=!0;var l=this.encoder.encode(a);b=l.length;c||!h||(c=100);if(1===b)return O.call(this,l[0],"",c,e);g=this.depth&&!1!==g;if(2===b&&g&&!f)return O.call(this,l[0],l[1],c,e);let t=h=0;if(1<b){const n=x(),m=[];for(let p=0,v;p<b;p++)if((v=l[p])&&!n[v]){if(f||P(this,v))m.push(v),
+n[v]=1;else return d;const w=v.length;h=Math.max(h,w);t=t?Math.min(t,w):w}l=m;b=a.length}if(!b)return d;a=0;if(1===b)return O.call(this,l[0],"",c,e);if(2===b&&g&&!f)return O.call(this,l[0],l[1],c,e);if(1<b)if(g){var q=l[0];a=1}else 9<h&&3<h/t&&l.sort(y);k||0===k||(k=this.resolution);for(let n,m;a<b;a++){m=l[a];q?(n=P(this,m,q),n=Q(n,d,f,this.A),f&&!1===n&&d.length||(q=m)):(n=P(this,m,""),n=Q(n,d,f,k));if(n)return n;if(f&&a===b-1){g=d.length;if(!g){if(q){q="";a=-1;continue}return d}if(1===g)return N(d[0],
+c,e)}}a:{q=f;b=d.length;f=[];g=x();for(let n=0,m,p,v,w;n<k;n++)for(a=0;a<b;a++)if(v=d[a],n<v.length&&(m=v[n]))for(h=0;h<m.length;h++)p=m[h],(l=g[p])?g[p]++:(l=0,g[p]=1),w=f[l]||(f[l]=[]),w.push(p);if(k=f.length)if(q){if(1<f.length)b:for(k=[],d=x(),q=f.length,l=q-1;0<=l;l--)for(q=f[l],g=q.length,a=0;a<g;a++){if(b=q[a],!d[b])if(d[b]=1,e)e--;else if(k.push(b),k.length===c)break b}else k=(f=f[0]).length>c||e?f.slice(e,c+e):f;f=k}else{if(k<b){d=[];break a}f=f[k-1];if(c||e)if(f.length>c||e)f=f.slice(e,
+c+e)}d=f}return d};function O(a,c,b,d){return(a=P(this,a,c))&&a.length?N(a,b,d):[]}function Q(a,c,b,d){let e=[];if(a){d=Math.min(a.length,d);for(let g=0,f;g<d;g++)(f=a[g])&&f&&(e[g]=f);if(e.length){c.push(e);return}}return!b&&e}function P(a,c,b){let d;b&&(d=a.bidirectional&&c>b);a=b?(a=a.ctx.get(d?c:b))&&a.get(d?b:c):a.map.get(c);return a};K.prototype.remove=function(a,c){const b=this.reg.size&&(this.fastupdate?this.reg.get(a):this.reg.has(a));if(b){if(this.fastupdate)for(let d=0,e;d<b.length;d++){if(e=b[d])if(2>e.length)e.pop();else{const g=e.indexOf(a);g===b.length-1?e.pop():e.splice(g,1)}}else R(this.map,a),this.depth&&R(this.ctx,a);c||this.reg.delete(a)}this.cache&&this.cache.remove(a);return this};
+function R(a,c){let b=0;if(a.constructor===Array)for(let d=0,e,g;d<a.length;d++){if((e=a[d])&&e.length)if(g=e.indexOf(c),0<=g){1<e.length?(e.splice(g,1),b++):delete a[d];break}else b++}else for(let d of a){const e=d[0],g=R(d[1],c);g?b+=g:a.delete(e)}return b};function K(a,c){if(!this||this.constructor!==K)return new K(a);if(a){var b="string"===typeof a?a:a.preset;b&&(a=Object.assign({},J[b],a))}else a={};b=a.context;const d=!0===b?{depth:1}:b||{},e=a.encode||a.encoder||I;this.encoder=e.encode?e:"object"===typeof e?new E(e):{encode:e};this.resolution=a.resolution||9;this.tokenize=b=a.tokenize||"strict";this.depth="strict"===b&&d.depth||0;this.bidirectional=!1!==d.bidirectional;this.fastupdate=!!a.fastupdate;this.score=a.score||null;b=!1;this.map=new Map;
+this.ctx=new Map;this.reg=c||(this.fastupdate?new Map:new Set);this.A=d.resolution||3;this.rtl=e.rtl||a.rtl||!1;this.cache=(b=a.cache||null)&&new H(b)}r=K.prototype;r.clear=function(){this.map.clear();this.ctx.clear();this.reg.clear();this.cache&&this.cache.clear();return this};r.append=function(a,c){return this.add(a,c,!0)};r.contain=function(a){return this.reg.has(a)};r.update=function(a,c){const b=this,d=this.remove(a);return d&&d.then?d.then(()=>b.add(a,c)):this.add(a,c)};
+function S(a){let c=0;if(a.constructor===Array)for(let b=0,d;b<a.length;b++)(d=a[b])&&(c+=d.length);else for(const b of a){const d=b[0],e=S(b[1]);e?c+=e:a.delete(d)}return c}r.cleanup=function(){if(!this.fastupdate)return this;S(this.map);this.depth&&S(this.ctx);return this};r.searchCache=function(a,c,b){a=("object"===typeof a?""+a.query:a).toLowerCase();let d=this.cache.get(a);if(!d){d=this.search(a,c,b);if(d.then){const e=this;d.then(function(g){e.cache.set(a,g);return g})}this.cache.set(a,d)}return d};const T={Index:K,Charset:null,Encoder:E,Document:null,Worker:null,Resolver:null,IndexedDB:null,Language:{}},U=self;let V;(V=U.define)&&V.amd?V([],function(){return T}):"object"===typeof U.exports?U.exports=T:U.FlexSearch=T;}(this||self));
diff --git a/dist/flexsearch.light.module.debug.js b/dist/flexsearch.light.module.debug.js
index 22e033b..79bf578 100644
--- a/dist/flexsearch.light.module.debug.js
+++ b/dist/flexsearch.light.module.debug.js
@@ -5,7 +5,8 @@
  * Hosted by Nextapps GmbH
  * https://github.com/nextapps-de/flexsearch
  */
-function t(a, c, b) {
+var r;
+function u(a, c, b) {
   const d = typeof b, e = typeof a;
   if ("undefined" !== d) {
     if ("undefined" !== e) {
@@ -42,23 +43,24 @@ function t(a, c, b) {
   }
   return "undefined" === e ? c : a;
 }
-function u() {
+function x() {
   return Object.create(null);
 }
-function v(a, c) {
+function y(a, c) {
   return c.length - a.length;
 }
-;const w = /[^\p{L}\p{N}]+/u, x = /(\d{3})/g, y = /(\D)(\d{3})/g, z = /(\d{3})(\D)/g, B = "".normalize && /[\u0300-\u036f]/g;
-function C(a) {
-  if (!this || this.constructor !== C) {
-    return new C(...arguments);
+;const z = /[^\p{L}\p{N}]+/u, A = /(\d{3})/g, B = /(\D)(\d{3})/g, C = /(\d{3})(\D)/g, D = "".normalize && /[\u0300-\u036f]/g;
+function E(a) {
+  if (!this || this.constructor !== E) {
+    return new E(...arguments);
   }
   for (let c = 0; c < arguments.length; c++) {
     this.assign(arguments[c]);
   }
 }
-C.prototype.assign = function(a) {
-  this.normalize = t(a.normalize, !0, this.normalize);
+r = E.prototype;
+r.assign = function(a) {
+  this.normalize = u(a.normalize, !0, this.normalize);
   let c = a.include, b = c || a.exclude || a.split;
   if ("object" === typeof b) {
     let d = !c, e = "";
@@ -79,55 +81,106 @@ C.prototype.assign = function(a) {
     this.numeric = d;
   } else {
     try {
-      this.split = t(b, w, this.split);
+      this.split = u(b, z, this.split);
     } catch (d) {
       this.split = /\s+/;
     }
-    this.numeric = t(this.numeric, !0);
+    this.numeric = u(this.numeric, !0);
   }
-  this.prepare = t(a.prepare, null, this.prepare);
-  this.finalize = t(a.finalize, null, this.finalize);
+  this.prepare = u(a.prepare, null, this.prepare);
+  this.finalize = u(a.finalize, null, this.finalize);
   this.rtl = a.rtl || !1;
-  this.dedupe = t(a.dedupe, !0, this.dedupe);
-  this.filter = t((b = a.filter) && new Set(b), null, this.filter);
-  this.matcher = t((b = a.matcher) && new Map(b), null, this.matcher);
-  this.mapper = t((b = a.mapper) && new Map(b), null, this.mapper);
-  this.stemmer = t((b = a.stemmer) && new Map(b), null, this.stemmer);
-  this.replacer = t(a.replacer, null, this.replacer);
-  this.minlength = t(a.minlength, 1, this.minlength);
-  this.maxlength = t(a.maxlength, 0, this.maxlength);
-  if (this.cache = b = t(a.cache, !0, this.cache)) {
-    this.j = null, this.v = "number" === typeof b ? b : 2e5, this.h = new Map(), this.i = new Map(), this.l = this.g = 128;
+  this.dedupe = u(a.dedupe, !0, this.dedupe);
+  this.filter = u((b = a.filter) && new Set(b), null, this.filter);
+  this.matcher = u((b = a.matcher) && new Map(b), null, this.matcher);
+  this.mapper = u((b = a.mapper) && new Map(b), null, this.mapper);
+  this.stemmer = u((b = a.stemmer) && new Map(b), null, this.stemmer);
+  this.replacer = u(a.replacer, null, this.replacer);
+  this.minlength = u(a.minlength, 1, this.minlength);
+  this.maxlength = u(a.maxlength, 0, this.maxlength);
+  if (this.cache = b = u(a.cache, !0, this.cache)) {
+    this.l = null, this.v = "number" === typeof b ? b : 2e5, this.h = new Map(), this.j = new Map(), this.o = this.m = 128;
   }
-  this.m = "";
+  this.g = "";
   this.s = null;
-  this.o = "";
+  this.i = "";
   this.u = null;
   if (this.matcher) {
     for (const d of this.matcher.keys()) {
-      this.m += (this.m ? "|" : "") + d;
+      this.g += (this.g ? "|" : "") + d;
     }
   }
   if (this.stemmer) {
     for (const d of this.stemmer.keys()) {
-      this.o += (this.o ? "|" : "") + d;
+      this.i += (this.i ? "|" : "") + d;
     }
   }
   return this;
 };
-C.prototype.encode = function(a) {
-  if (this.cache && a.length <= this.g) {
-    if (this.j) {
+r.addMatcher = function(a, c) {
+  if ("object" === typeof a) {
+    return this.addReplacer(a, c);
+  }
+  if (2 > a.length) {
+    return this.addMapper(a, c);
+  }
+  this.matcher || (this.matcher = new Map());
+  this.matcher.set(a, c);
+  this.g += (this.g ? "|" : "") + a;
+  this.s = null;
+  this.cache && F(this);
+  return this;
+};
+r.addStemmer = function(a, c) {
+  this.stemmer || (this.stemmer = new Map());
+  this.stemmer.set(a, c);
+  this.i += (this.i ? "|" : "") + a;
+  this.u = null;
+  this.cache && F(this);
+  return this;
+};
+r.addFilter = function(a) {
+  this.filter || (this.filter = new Set());
+  this.filter.add(a);
+  this.cache && F(this);
+  return this;
+};
+r.addMapper = function(a, c) {
+  if ("object" === typeof a) {
+    return this.addReplacer(a, c);
+  }
+  if (1 < a.length) {
+    return this.addMatcher(a, c);
+  }
+  this.mapper || (this.mapper = new Map());
+  this.mapper.set(a, c);
+  this.cache && F(this);
+  return this;
+};
+r.addReplacer = function(a, c) {
+  "string" === typeof a && (a = new RegExp(a, "g"));
+  this.replacer || (this.replacer = []);
+  this.replacer.push(a, c || "");
+  this.cache && F(this);
+  return this;
+};
+function F(a) {
+  a.h.clear();
+  a.j.clear();
+}
+r.encode = function(a) {
+  if (this.cache && a.length <= this.m) {
+    if (this.l) {
       if (this.h.has(a)) {
         return this.h.get(a);
       }
     } else {
-      this.j = setTimeout(D, 50, this);
+      this.l = setTimeout(G, 50, this);
     }
   }
-  this.normalize && (a = "function" === typeof this.normalize ? this.normalize(a) : B ? a.normalize("NFKD").replace(B, "").toLowerCase() : a.toLowerCase());
+  this.normalize && (a = "function" === typeof this.normalize ? this.normalize(a) : D ? a.normalize("NFKD").replace(D, "").toLowerCase() : a.toLowerCase());
   this.prepare && (a = this.prepare(a));
-  this.numeric && 3 < a.length && (a = a.replace(y, "$1 $2").replace(z, "$1 $2").replace(x, "$1 "));
+  this.numeric && 3 < a.length && (a = a.replace(B, "$1 $2").replace(C, "$1 $2").replace(A, "$1 "));
   const c = !(this.dedupe || this.mapper || this.filter || this.matcher || this.stemmer || this.replacer);
   let b = [], d = this.split || "" === this.split ? a.split(this.split) : a;
   for (let g = 0, f, h; g < d.length; g++) {
@@ -144,95 +197,95 @@ C.prototype.encode = function(a) {
     if (this.filter && this.filter.has(f)) {
       continue;
     }
-    if (this.cache && f.length <= this.l) {
-      if (this.j) {
-        var e = this.i.get(f);
+    if (this.cache && f.length <= this.o) {
+      if (this.l) {
+        var e = this.j.get(f);
         if (e || "" === e) {
           e && b.push(e);
           continue;
         }
       } else {
-        this.j = setTimeout(D, 50, this);
+        this.l = setTimeout(G, 50, this);
       }
     }
     let k;
-    this.stemmer && 2 < f.length && (this.u || (this.u = new RegExp("(?!^)(" + this.o + ")$")), f = f.replace(this.u, p => this.stemmer.get(p)), k = 1);
+    this.stemmer && 2 < f.length && (this.u || (this.u = new RegExp("(?!^)(" + this.i + ")$")), f = f.replace(this.u, l => this.stemmer.get(l)), k = 1);
     f && k && (f.length < this.minlength || this.filter && this.filter.has(f)) && (f = "");
     if (f && (this.mapper || this.dedupe && 1 < f.length)) {
       e = "";
-      for (let p = 0, q = "", m, r; p < f.length; p++) {
-        m = f.charAt(p), m === q && this.dedupe || ((r = this.mapper && this.mapper.get(m)) || "" === r ? r === q && this.dedupe || !(q = r) || (e += r) : e += q = m);
+      for (let l = 0, t = "", q, n; l < f.length; l++) {
+        q = f.charAt(l), q === t && this.dedupe || ((n = this.mapper && this.mapper.get(q)) || "" === n ? n === t && this.dedupe || !(t = n) || (e += n) : e += t = q);
       }
       f = e;
     }
-    this.matcher && 1 < f.length && (this.s || (this.s = new RegExp("(" + this.m + ")", "g")), f = f.replace(this.s, p => this.matcher.get(p)));
+    this.matcher && 1 < f.length && (this.s || (this.s = new RegExp("(" + this.g + ")", "g")), f = f.replace(this.s, l => this.matcher.get(l)));
     if (f && this.replacer) {
       for (e = 0; f && e < this.replacer.length; e += 2) {
         f = f.replace(this.replacer[e], this.replacer[e + 1]);
       }
     }
-    this.cache && h.length <= this.l && (this.i.set(h, f), this.i.size > this.v && (this.i.clear(), this.l = this.l / 1.1 | 0));
+    this.cache && h.length <= this.o && (this.j.set(h, f), this.j.size > this.v && (this.j.clear(), this.o = this.o / 1.1 | 0));
     f && b.push(f);
   }
   this.finalize && (b = this.finalize(b) || b);
-  this.cache && a.length <= this.g && (this.h.set(a, b), this.h.size > this.v && (this.h.clear(), this.g = this.g / 1.1 | 0));
+  this.cache && a.length <= this.m && (this.h.set(a, b), this.h.size > this.v && (this.h.clear(), this.m = this.m / 1.1 | 0));
   return b;
 };
-function D(a) {
-  a.j = null;
+function G(a) {
+  a.l = null;
   a.h.clear();
-  a.i.clear();
+  a.j.clear();
 }
-;function E(a) {
+;function H(a) {
   this.limit = a && !0 !== a ? a : 1000;
   this.cache = new Map();
   this.g = "";
 }
-E.prototype.set = function(a, c) {
+H.prototype.set = function(a, c) {
   this.cache.set(this.g = a, c);
   this.cache.size > this.limit && this.cache.delete(this.cache.keys().next().value);
 };
-E.prototype.get = function(a) {
+H.prototype.get = function(a) {
   const c = this.cache.get(a);
   c && this.g !== a && (this.cache.delete(a), this.cache.set(this.g = a, c));
   return c;
 };
-E.prototype.remove = function(a) {
+H.prototype.remove = function(a) {
   for (const c of this.cache) {
     const b = c[0];
     c[1].includes(a) && this.cache.delete(b);
   }
 };
-E.prototype.clear = function() {
+H.prototype.clear = function() {
   this.cache.clear();
   this.g = "";
 };
-const F = {normalize:function(a) {
+const I = {normalize:function(a) {
   return a.toLowerCase();
 }, dedupe:!1};
-const G = {memory:{resolution:1}, performance:{resolution:6, fastupdate:!0, context:{depth:1, resolution:3}}, match:{tokenize:"forward"}, score:{resolution:9, context:{depth:2, resolution:9}}};
-u();
-H.prototype.add = function(a, c, b, d) {
+const J = {memory:{resolution:1}, performance:{resolution:6, fastupdate:!0, context:{depth:1, resolution:3}}, match:{tokenize:"forward"}, score:{resolution:9, context:{depth:2, resolution:9}}};
+x();
+K.prototype.add = function(a, c, b, d) {
   if (c && (a || 0 === a)) {
     if (!d && !b && this.reg.has(a)) {
       return this.update(a, c);
     }
     c = this.encoder.encode(c);
     if (d = c.length) {
-      const p = u(), q = u(), m = this.depth, r = this.resolution;
-      for (let l = 0; l < d; l++) {
-        let n = c[this.rtl ? d - 1 - l : l];
-        var e = n.length;
-        if (e && (m || !q[n])) {
-          var g = this.score ? this.score(c, n, l, null, 0) : J(r, d, l), f = "";
+      const l = x(), t = x(), q = this.depth, n = this.resolution;
+      for (let m = 0; m < d; m++) {
+        let p = c[this.rtl ? d - 1 - m : m];
+        var e = p.length;
+        if (e && (q || !t[p])) {
+          var g = this.score ? this.score(c, p, m, null, 0) : L(n, d, m), f = "";
           switch(this.tokenize) {
             case "full":
               if (2 < e) {
                 for (g = 0; g < e; g++) {
                   for (var h = e; h > g; h--) {
-                    f = n.substring(g, h);
-                    var k = this.score ? this.score(c, n, l, f, g) : J(r, d, l, e, g);
-                    K(this, q, f, k, a, b);
+                    f = p.substring(g, h);
+                    var k = this.score ? this.score(c, p, m, f, g) : L(n, d, m, e, g);
+                    M(this, t, f, k, a, b);
                   }
                 }
                 break;
@@ -240,24 +293,24 @@ H.prototype.add = function(a, c, b, d) {
             case "reverse":
               if (1 < e) {
                 for (h = e - 1; 0 < h; h--) {
-                  f = n[h] + f, k = this.score ? this.score(c, n, l, f, h) : J(r, d, l, e, h), K(this, q, f, k, a, b);
+                  f = p[h] + f, k = this.score ? this.score(c, p, m, f, h) : L(n, d, m, e, h), M(this, t, f, k, a, b);
                 }
                 f = "";
               }
             case "forward":
               if (1 < e) {
                 for (h = 0; h < e; h++) {
-                  f += n[h], K(this, q, f, g, a, b);
+                  f += p[h], M(this, t, f, g, a, b);
                 }
                 break;
               }
             default:
-              if (K(this, q, n, g, a, b), m && 1 < d && l < d - 1) {
-                for (e = u(), f = this.A, g = n, h = Math.min(m + 1, d - l), e[g] = 1, k = 1; k < h; k++) {
-                  if ((n = c[this.rtl ? d - 1 - l - k : l + k]) && !e[n]) {
-                    e[n] = 1;
-                    const A = this.score ? this.score(c, g, l, n, k) : J(f + (d / 2 > f ? 0 : 1), d, l, h - 1, k - 1), I = this.bidirectional && n > g;
-                    K(this, p, I ? g : n, A, a, b, I ? n : g);
+              if (M(this, t, p, g, a, b), q && 1 < d && m < d - 1) {
+                for (e = x(), f = this.A, g = p, h = Math.min(q + 1, d - m), e[g] = 1, k = 1; k < h; k++) {
+                  if ((p = c[this.rtl ? d - 1 - m - k : m + k]) && !e[p]) {
+                    e[p] = 1;
+                    const v = this.score ? this.score(c, g, m, p, k) : L(f + (d / 2 > f ? 0 : 1), d, m, h - 1, k - 1), w = this.bidirectional && p > g;
+                    M(this, l, w ? g : p, v, a, b, w ? p : g);
                   }
                 }
               }
@@ -269,16 +322,16 @@ H.prototype.add = function(a, c, b, d) {
   }
   return this;
 };
-function K(a, c, b, d, e, g, f) {
+function M(a, c, b, d, e, g, f) {
   let h = f ? a.ctx : a.map, k;
   if (!c[b] || f && !(k = c[b])[f]) {
-    f ? (c = k || (c[b] = u()), c[f] = 1, (k = h.get(f)) ? h = k : h.set(f, h = new Map())) : c[b] = 1, (k = h.get(b)) ? h = k : h.set(b, h = []), h = h[d] || (h[d] = []), g && h.includes(e) || (h.push(e), a.fastupdate && ((c = a.reg.get(e)) ? c.push(h) : a.reg.set(e, [h])));
+    f ? (c = k || (c[b] = x()), c[f] = 1, (k = h.get(f)) ? h = k : h.set(f, h = new Map())) : c[b] = 1, (k = h.get(b)) ? h = k : h.set(b, h = []), h = h[d] || (h[d] = []), g && h.includes(e) || (h.push(e), a.fastupdate && ((c = a.reg.get(e)) ? c.push(h) : a.reg.set(e, [h])));
   }
 }
-function J(a, c, b, d, e) {
+function L(a, c, b, d, e) {
   return b && 1 < a ? c + (d || 0) <= a ? b + (e || 0) : (a - 1) / (c + (d || 0)) * (b + (e || 0)) + 1 | 0 : 0;
 }
-;function L(a, c, b) {
+;function N(a, c, b) {
   if (1 === a.length) {
     return a = a[0], a = b || a.length > c ? c ? a.slice(b, b + c) : a.slice(b) : a;
   }
@@ -308,7 +361,7 @@ function J(a, c, b, d, e) {
   }
   return d.length ? d = 1 < d.length ? [].concat.apply([], d) : d[0] : d;
 }
-;H.prototype.search = function(a, c, b) {
+;K.prototype.search = function(a, c, b) {
   b || (c || "object" !== typeof a ? "object" === typeof c && (b = c, c = 0) : (b = a, a = ""));
   var d = [], e = 0;
   if (b) {
@@ -317,102 +370,104 @@ function J(a, c, b, d, e) {
     e = b.offset || 0;
     var g = b.context;
     var f = b.suggest;
+    var h = !0;
+    var k = b.resolution;
+  } else {
+    h = !0;
   }
-  a = this.encoder.encode(a);
-  b = a.length;
-  c || (c = 100);
+  var l = this.encoder.encode(a);
+  b = l.length;
+  c || !h || (c = 100);
   if (1 === b) {
-    return M.call(this, a[0], "", c, e);
+    return O.call(this, l[0], "", c, e);
   }
   g = this.depth && !1 !== g;
   if (2 === b && g && !f) {
-    return M.call(this, a[0], a[1], c, e);
+    return O.call(this, l[0], l[1], c, e);
   }
-  var h = 0, k = 0;
+  let t = h = 0;
   if (1 < b) {
-    var p = u();
-    const m = [];
-    for (let r = 0, l; r < b; r++) {
-      if ((l = a[r]) && !p[l]) {
-        if (f || N(this, l)) {
-          m.push(l), p[l] = 1;
+    const n = x(), m = [];
+    for (let p = 0, v; p < b; p++) {
+      if ((v = l[p]) && !n[v]) {
+        if (f || P(this, v)) {
+          m.push(v), n[v] = 1;
         } else {
           return d;
         }
-        const n = l.length;
-        h = Math.max(h, n);
-        k = k ? Math.min(k, n) : n;
+        const w = v.length;
+        h = Math.max(h, w);
+        t = t ? Math.min(t, w) : w;
       }
     }
-    a = m;
+    l = m;
     b = a.length;
   }
   if (!b) {
     return d;
   }
-  p = 0;
+  a = 0;
   if (1 === b) {
-    return M.call(this, a[0], "", c, e);
+    return O.call(this, l[0], "", c, e);
   }
   if (2 === b && g && !f) {
-    return M.call(this, a[0], a[1], c, e);
+    return O.call(this, l[0], l[1], c, e);
   }
   if (1 < b) {
     if (g) {
-      var q = a[0];
-      p = 1;
+      var q = l[0];
+      a = 1;
     } else {
-      9 < h && 3 < h / k && a.sort(v);
+      9 < h && 3 < h / t && l.sort(y);
     }
   }
-  for (let m, r; p < b; p++) {
-    r = a[p];
-    q ? (m = N(this, r, q), m = O(m, d, f, this.A), f && !1 === m && d.length || (q = r)) : (m = N(this, r, ""), m = O(m, d, f, this.resolution));
-    if (m) {
-      return m;
+  k || 0 === k || (k = this.resolution);
+  for (let n, m; a < b; a++) {
+    m = l[a];
+    q ? (n = P(this, m, q), n = Q(n, d, f, this.A), f && !1 === n && d.length || (q = m)) : (n = P(this, m, ""), n = Q(n, d, f, k));
+    if (n) {
+      return n;
     }
-    if (f && p === b - 1) {
+    if (f && a === b - 1) {
       g = d.length;
       if (!g) {
         if (q) {
           q = "";
-          p = -1;
+          a = -1;
           continue;
         }
         return d;
       }
       if (1 === g) {
-        return L(d[0], c, e);
+        return N(d[0], c, e);
       }
     }
   }
   a: {
-    a = d;
-    d = this.resolution;
     q = f;
-    b = a.length;
+    b = d.length;
     f = [];
-    g = u();
-    for (let m = 0, r, l, n, A; m < d; m++) {
-      for (k = 0; k < b; k++) {
-        if (n = a[k], m < n.length && (r = n[m])) {
-          for (p = 0; p < r.length; p++) {
-            l = r[p], (h = g[l]) ? g[l]++ : (h = 0, g[l] = 1), A = f[h] || (f[h] = []), A.push(l);
+    g = x();
+    for (let n = 0, m, p, v, w; n < k; n++) {
+      for (a = 0; a < b; a++) {
+        if (v = d[a], n < v.length && (m = v[n])) {
+          for (h = 0; h < m.length; h++) {
+            p = m[h], (l = g[p]) ? g[p]++ : (l = 0, g[p] = 1), w = f[l] || (f[l] = []), w.push(p);
           }
         }
       }
     }
-    if (a = f.length) {
+    if (k = f.length) {
       if (q) {
         if (1 < f.length) {
           b: {
-            for (a = [], d = u(), q = f.length, h = q - 1; 0 <= h; h--) {
-              for (q = f[h], g = q.length, k = 0; k < g; k++) {
-                if (b = q[k], !d[b]) {
+            for (k = [], d = x(), q = f.length, l = q - 1; 0 <= l; l--) {
+              for (q = f[l], g = q.length, a = 0; a < g; a++) {
+                if (b = q[a], !d[b]) {
                   if (d[b] = 1, e) {
                     e--;
                   } else {
-                    if (a.push(b), a.length === c) {
+                    if (k.push(b), k.length === c) {
                       break b;
                     }
                   }
@@ -421,15 +476,15 @@ function J(a, c, b, d, e) {
             }
           }
         } else {
-          a = (f = f[0]).length > c || e ? f.slice(e, c + e) : f;
+          k = (f = f[0]).length > c || e ? f.slice(e, c + e) : f;
         }
-        f = a;
+        f = k;
       } else {
-        if (a < b) {
+        if (k < b) {
           d = [];
           break a;
         }
-        f = f[a - 1];
+        f = f[k - 1];
         if (c || e) {
           if (f.length > c || e) {
             f = f.slice(e, c + e);
@@ -441,10 +496,10 @@ function J(a, c, b, d, e) {
   }
   return d;
 };
-function M(a, c, b, d) {
-  return (a = N(this, a, c)) && a.length ? L(a, b, d) : [];
-}
 function O(a, c, b, d) {
+  return (a = P(this, a, c)) && a.length ? N(a, b, d) : [];
+}
+function Q(a, c, b, d) {
   let e = [];
   if (a) {
     d = Math.min(a.length, d);
@@ -458,13 +513,13 @@ function O(a, c, b, d) {
   }
   return !b && e;
 }
-function N(a, c, b) {
+function P(a, c, b) {
   let d;
   b && (d = a.bidirectional && c > b);
   a = b ? (a = a.ctx.get(d ? c : b)) && a.get(d ? b : c) : a.map.get(c);
   return a;
 }
-;H.prototype.remove = function(a, c) {
+;K.prototype.remove = function(a, c) {
   const b = this.reg.size && (this.fastupdate ? this.reg.get(a) : this.reg.has(a));
   if (b) {
     if (this.fastupdate) {
@@ -479,14 +534,14 @@ function N(a, c, b) {
         }
       }
     } else {
-      P(this.map, a), this.depth && P(this.ctx, a);
+      R(this.map, a), this.depth && R(this.ctx, a);
     }
     c || this.reg.delete(a);
   }
   this.cache && this.cache.remove(a);
   return this;
 };
-function P(a, c) {
+function R(a, c) {
   let b = 0;
   if (a.constructor === Array) {
     for (let d = 0, e, g; d < a.length; d++) {
@@ -501,58 +556,58 @@ function P(a, c) {
     }
   } else {
     for (let d of a) {
-      const e = d[0], g = P(d[1], c);
+      const e = d[0], g = R(d[1], c);
       g ? b += g : a.delete(e);
     }
   }
   return b;
 }
-;function H(a, c) {
-  if (!this || this.constructor !== H) {
-    return new H(a);
+;function K(a, c) {
+  if (!this || this.constructor !== K) {
+    return new K(a);
   }
   if (a) {
     var b = "string" === typeof a ? a : a.preset;
-    b && (G[b] || console.warn("Preset not found: " + b), a = Object.assign({}, G[b], a));
+    b && (J[b] || console.warn("Preset not found: " + b), a = Object.assign({}, J[b], a));
   } else {
     a = {};
   }
-  b = a.context || {};
-  const d = a.encode || a.encoder || F;
-  this.encoder = d.encode ? d : "object" === typeof d ? new C(d) : {encode:d};
-  let e;
+  b = a.context;
+  const d = !0 === b ? {depth:1} : b || {}, e = a.encode || a.encoder || I;
+  this.encoder = e.encode ? e : "object" === typeof e ? new E(e) : {encode:e};
   this.resolution = a.resolution || 9;
-  this.tokenize = e = a.tokenize || "strict";
-  this.depth = "strict" === e && b.depth || 0;
-  this.bidirectional = !1 !== b.bidirectional;
+  this.tokenize = b = a.tokenize || "strict";
+  this.depth = "strict" === b && d.depth || 0;
+  this.bidirectional = !1 !== d.bidirectional;
   this.fastupdate = !!a.fastupdate;
   this.score = a.score || null;
-  e = !1;
+  b = !1;
   this.map = new Map();
   this.ctx = new Map();
   this.reg = c || (this.fastupdate ? new Map() : new Set());
-  this.A = b.resolution || 1;
-  this.rtl = d.rtl || a.rtl || !1;
-  this.cache = (e = a.cache || null) && new E(e);
+  this.A = d.resolution || 3;
+  this.rtl = e.rtl || a.rtl || !1;
+  this.cache = (b = a.cache || null) && new H(b);
 }
-H.prototype.clear = function() {
+r = K.prototype;
+r.clear = function() {
   this.map.clear();
   this.ctx.clear();
   this.reg.clear();
   this.cache && this.cache.clear();
   return this;
 };
-H.prototype.append = function(a, c) {
+r.append = function(a, c) {
   return this.add(a, c, !0);
 };
-H.prototype.contain = function(a) {
+r.contain = function(a) {
   return this.reg.has(a);
 };
-H.prototype.update = function(a, c) {
+r.update = function(a, c) {
   const b = this, d = this.remove(a);
   return d && d.then ? d.then(() => b.add(a, c)) : this.add(a, c);
 };
-function Q(a) {
+function S(a) {
   let c = 0;
   if (a.constructor === Array) {
     for (let b = 0, d; b < a.length; b++) {
@@ -560,21 +615,21 @@ function Q(a) {
     }
   } else {
     for (const b of a) {
-      const d = b[0], e = Q(b[1]);
+      const d = b[0], e = S(b[1]);
       e ? c += e : a.delete(d);
     }
   }
   return c;
 }
-H.prototype.cleanup = function() {
+r.cleanup = function() {
   if (!this.fastupdate) {
     return console.info('Cleanup the index isn\'t required when not using "fastupdate".'), this;
   }
-  Q(this.map);
-  this.depth && Q(this.ctx);
+  S(this.map);
+  this.depth && S(this.ctx);
   return this;
 };
-H.prototype.searchCache = function(a, c, b) {
+r.searchCache = function(a, c, b) {
   a = ("object" === typeof a ? "" + a.query : a).toLowerCase();
   let d = this.cache.get(a);
   if (!d) {
@@ -590,6 +645,6 @@ H.prototype.searchCache = function(a, c, b) {
   }
   return d;
 };
-export default {Index:H, Charset:null, Encoder:C, Document:null, Worker:null, Resolver:null, IndexedDB:null, Language:{}};
+export default {Index:K, Charset:null, Encoder:E, Document:null, Worker:null, Resolver:null, IndexedDB:null, Language:{}};
 
-export const Index=H;export const  Charset=null;export const  Encoder=C;export const  Document=null;export const  Worker=null;export const  Resolver=null;export const  IndexedDB=null;export const  Language={};
\ No newline at end of file
+export const Index=K;export const  Charset=null;export const  Encoder=E;export const  Document=null;export const  Worker=null;export const  Resolver=null;export const  IndexedDB=null;export const  Language={};
\ No newline at end of file
diff --git a/dist/flexsearch.light.module.min.js b/dist/flexsearch.light.module.min.js
index 461cc62..712d6e4 100644
--- a/dist/flexsearch.light.module.min.js
+++ b/dist/flexsearch.light.module.min.js
@@ -5,22 +5,24 @@
  * Hosted by Nextapps GmbH
  * https://github.com/nextapps-de/flexsearch
  */
-function t(a,c,b){const d=typeof b,e=typeof a;if("undefined"!==d){if("undefined"!==e){if(b){if("function"===e&&d===e)return function(h){return a(b(h))};c=a.constructor;if(c===b.constructor){if(c===Array)return b.concat(a);if(c===Map){var g=new Map(b);for(var f of a)g.set(f[0],f[1]);return g}if(c===Set){f=new Set(b);for(g of a.values())f.add(g);return f}}}return a}return b}return"undefined"===e?c:a}function u(){return Object.create(null)}function v(a,c){return c.length-a.length};const w=/[^\p{L}\p{N}]+/u,x=/(\d{3})/g,y=/(\D)(\d{3})/g,z=/(\d{3})(\D)/g,B="".normalize&&/[\u0300-\u036f]/g;function C(a){if(!this||this.constructor!==C)return new C(...arguments);for(let c=0;c<arguments.length;c++)this.assign(arguments[c])}
-C.prototype.assign=function(a){this.normalize=t(a.normalize,!0,this.normalize);let c=a.include,b=c||a.exclude||a.split;if("object"===typeof b){let d=!c,e="";a.include||(e+="\\p{Z}");b.letter&&(e+="\\p{L}");b.number&&(e+="\\p{N}",d=!!c);b.symbol&&(e+="\\p{S}");b.punctuation&&(e+="\\p{P}");b.control&&(e+="\\p{C}");if(b=b.char)e+="object"===typeof b?b.join(""):b;try{this.split=new RegExp("["+(c?"^":"")+e+"]+","u")}catch(g){this.split=/\s+/}this.numeric=d}else{try{this.split=t(b,w,this.split)}catch(d){this.split=
-/\s+/}this.numeric=t(this.numeric,!0)}this.prepare=t(a.prepare,null,this.prepare);this.finalize=t(a.finalize,null,this.finalize);this.rtl=a.rtl||!1;this.dedupe=t(a.dedupe,!0,this.dedupe);this.filter=t((b=a.filter)&&new Set(b),null,this.filter);this.matcher=t((b=a.matcher)&&new Map(b),null,this.matcher);this.mapper=t((b=a.mapper)&&new Map(b),null,this.mapper);this.stemmer=t((b=a.stemmer)&&new Map(b),null,this.stemmer);this.replacer=t(a.replacer,null,this.replacer);this.minlength=t(a.minlength,1,this.minlength);
-this.maxlength=t(a.maxlength,0,this.maxlength);if(this.cache=b=t(a.cache,!0,this.cache))this.j=null,this.v="number"===typeof b?b:2E5,this.h=new Map,this.i=new Map,this.l=this.g=128;this.m="";this.s=null;this.o="";this.u=null;if(this.matcher)for(const d of this.matcher.keys())this.m+=(this.m?"|":"")+d;if(this.stemmer)for(const d of this.stemmer.keys())this.o+=(this.o?"|":"")+d;return this};
-C.prototype.encode=function(a){if(this.cache&&a.length<=this.g)if(this.j){if(this.h.has(a))return this.h.get(a)}else this.j=setTimeout(D,50,this);this.normalize&&(a="function"===typeof this.normalize?this.normalize(a):B?a.normalize("NFKD").replace(B,"").toLowerCase():a.toLowerCase());this.prepare&&(a=this.prepare(a));this.numeric&&3<a.length&&(a=a.replace(y,"$1 $2").replace(z,"$1 $2").replace(x,"$1 "));const c=!(this.dedupe||this.mapper||this.filter||this.matcher||this.stemmer||this.replacer);let b=
-[],d=this.split||""===this.split?a.split(this.split):a;for(let g=0,f,h;g<d.length;g++){if(!(f=h=d[g]))continue;if(f.length<this.minlength)continue;if(c){b.push(f);continue}if(this.filter&&this.filter.has(f))continue;if(this.cache&&f.length<=this.l)if(this.j){var e=this.i.get(f);if(e||""===e){e&&b.push(e);continue}}else this.j=setTimeout(D,50,this);let k;this.stemmer&&2<f.length&&(this.u||(this.u=new RegExp("(?!^)("+this.o+")$")),f=f.replace(this.u,p=>this.stemmer.get(p)),k=1);f&&k&&(f.length<this.minlength||
-this.filter&&this.filter.has(f))&&(f="");if(f&&(this.mapper||this.dedupe&&1<f.length)){e="";for(let p=0,q="",m,r;p<f.length;p++)m=f.charAt(p),m===q&&this.dedupe||((r=this.mapper&&this.mapper.get(m))||""===r?r===q&&this.dedupe||!(q=r)||(e+=r):e+=q=m);f=e}this.matcher&&1<f.length&&(this.s||(this.s=new RegExp("("+this.m+")","g")),f=f.replace(this.s,p=>this.matcher.get(p)));if(f&&this.replacer)for(e=0;f&&e<this.replacer.length;e+=2)f=f.replace(this.replacer[e],this.replacer[e+1]);this.cache&&h.length<=
-this.l&&(this.i.set(h,f),this.i.size>this.v&&(this.i.clear(),this.l=this.l/1.1|0));f&&b.push(f)}this.finalize&&(b=this.finalize(b)||b);this.cache&&a.length<=this.g&&(this.h.set(a,b),this.h.size>this.v&&(this.h.clear(),this.g=this.g/1.1|0));return b};function D(a){a.j=null;a.h.clear();a.i.clear()};function E(a){this.limit=a&&!0!==a?a:1E3;this.cache=new Map;this.g=""}E.prototype.set=function(a,c){this.cache.set(this.g=a,c);this.cache.size>this.limit&&this.cache.delete(this.cache.keys().next().value)};E.prototype.get=function(a){const c=this.cache.get(a);c&&this.g!==a&&(this.cache.delete(a),this.cache.set(this.g=a,c));return c};E.prototype.remove=function(a){for(const c of this.cache){const b=c[0];c[1].includes(a)&&this.cache.delete(b)}};
-E.prototype.clear=function(){this.cache.clear();this.g=""};const F={normalize:function(a){return a.toLowerCase()},dedupe:!1};const G={memory:{resolution:1},performance:{resolution:6,fastupdate:!0,context:{depth:1,resolution:3}},match:{tokenize:"forward"},score:{resolution:9,context:{depth:2,resolution:9}}};u();I.prototype.add=function(a,c,b,d){if(c&&(a||0===a)){if(!d&&!b&&this.reg.has(a))return this.update(a,c);c=this.encoder.encode(c);if(d=c.length){const p=u(),q=u(),m=this.depth,r=this.resolution;for(let l=0;l<d;l++){let n=c[this.rtl?d-1-l:l];var e=n.length;if(e&&(m||!q[n])){var g=this.score?this.score(c,n,l,null,0):J(r,d,l),f="";switch(this.tokenize){case "full":if(2<e){for(g=0;g<e;g++)for(var h=e;h>g;h--){f=n.substring(g,h);var k=this.score?this.score(c,n,l,f,g):J(r,d,l,e,g);K(this,q,f,k,a,b)}break}case "reverse":if(1<
-e){for(h=e-1;0<h;h--)f=n[h]+f,k=this.score?this.score(c,n,l,f,h):J(r,d,l,e,h),K(this,q,f,k,a,b);f=""}case "forward":if(1<e){for(h=0;h<e;h++)f+=n[h],K(this,q,f,g,a,b);break}default:if(K(this,q,n,g,a,b),m&&1<d&&l<d-1)for(e=u(),f=this.A,g=n,h=Math.min(m+1,d-l),e[g]=1,k=1;k<h;k++)if((n=c[this.rtl?d-1-l-k:l+k])&&!e[n]){e[n]=1;const A=this.score?this.score(c,g,l,n,k):J(f+(d/2>f?0:1),d,l,h-1,k-1),H=this.bidirectional&&n>g;K(this,p,H?g:n,A,a,b,H?n:g)}}}}this.fastupdate||this.reg.add(a)}}return this};
-function K(a,c,b,d,e,g,f){let h=f?a.ctx:a.map,k;if(!c[b]||f&&!(k=c[b])[f])f?(c=k||(c[b]=u()),c[f]=1,(k=h.get(f))?h=k:h.set(f,h=new Map)):c[b]=1,(k=h.get(b))?h=k:h.set(b,h=[]),h=h[d]||(h[d]=[]),g&&h.includes(e)||(h.push(e),a.fastupdate&&((c=a.reg.get(e))?c.push(h):a.reg.set(e,[h])))}function J(a,c,b,d,e){return b&&1<a?c+(d||0)<=a?b+(e||0):(a-1)/(c+(d||0))*(b+(e||0))+1|0:0};function L(a,c,b){if(1===a.length)return a=a[0],a=b||a.length>c?c?a.slice(b,b+c):a.slice(b):a;let d=[];for(let e=0,g,f;e<a.length;e++)if((g=a[e])&&(f=g.length)){if(b){if(b>=f){b-=f;continue}b<f&&(g=c?g.slice(b,b+c):g.slice(b),f=g.length,b=0)}if(d.length)f>c&&(g=g.slice(0,c),f=g.length),d.push(g);else{if(f>=c)return f>c&&(g=g.slice(0,c)),g;d=[g]}c-=f;if(!c)break}return d.length?d=1<d.length?[].concat.apply([],d):d[0]:d};I.prototype.search=function(a,c,b){b||(c||"object"!==typeof a?"object"===typeof c&&(b=c,c=0):(b=a,a=""));var d=[],e=0;if(b){a=b.query||a;c=b.limit||c;e=b.offset||0;var g=b.context;var f=b.suggest}a=this.encoder.encode(a);b=a.length;c||(c=100);if(1===b)return M.call(this,a[0],"",c,e);g=this.depth&&!1!==g;if(2===b&&g&&!f)return M.call(this,a[0],a[1],c,e);var h=0,k=0;if(1<b){var p=u();const m=[];for(let r=0,l;r<b;r++)if((l=a[r])&&!p[l]){if(f||N(this,l))m.push(l),p[l]=1;else return d;const n=l.length;
-h=Math.max(h,n);k=k?Math.min(k,n):n}a=m;b=a.length}if(!b)return d;p=0;if(1===b)return M.call(this,a[0],"",c,e);if(2===b&&g&&!f)return M.call(this,a[0],a[1],c,e);if(1<b)if(g){var q=a[0];p=1}else 9<h&&3<h/k&&a.sort(v);for(let m,r;p<b;p++){r=a[p];q?(m=N(this,r,q),m=O(m,d,f,this.A),f&&!1===m&&d.length||(q=r)):(m=N(this,r,""),m=O(m,d,f,this.resolution));if(m)return m;if(f&&p===b-1){g=d.length;if(!g){if(q){q="";p=-1;continue}return d}if(1===g)return L(d[0],c,e)}}a:{a=d;d=this.resolution;q=f;b=a.length;
-f=[];g=u();for(let m=0,r,l,n,A;m<d;m++)for(k=0;k<b;k++)if(n=a[k],m<n.length&&(r=n[m]))for(p=0;p<r.length;p++)l=r[p],(h=g[l])?g[l]++:(h=0,g[l]=1),A=f[h]||(f[h]=[]),A.push(l);if(a=f.length)if(q){if(1<f.length)b:for(a=[],d=u(),q=f.length,h=q-1;0<=h;h--)for(q=f[h],g=q.length,k=0;k<g;k++){if(b=q[k],!d[b])if(d[b]=1,e)e--;else if(a.push(b),a.length===c)break b}else a=(f=f[0]).length>c||e?f.slice(e,c+e):f;f=a}else{if(a<b){d=[];break a}f=f[a-1];if(c||e)if(f.length>c||e)f=f.slice(e,c+e)}d=f}return d};
-function M(a,c,b,d){return(a=N(this,a,c))&&a.length?L(a,b,d):[]}function O(a,c,b,d){let e=[];if(a){d=Math.min(a.length,d);for(let g=0,f;g<d;g++)(f=a[g])&&f&&(e[g]=f);if(e.length){c.push(e);return}}return!b&&e}function N(a,c,b){let d;b&&(d=a.bidirectional&&c>b);a=b?(a=a.ctx.get(d?c:b))&&a.get(d?b:c):a.map.get(c);return a};I.prototype.remove=function(a,c){const b=this.reg.size&&(this.fastupdate?this.reg.get(a):this.reg.has(a));if(b){if(this.fastupdate)for(let d=0,e;d<b.length;d++){if(e=b[d])if(2>e.length)e.pop();else{const g=e.indexOf(a);g===b.length-1?e.pop():e.splice(g,1)}}else P(this.map,a),this.depth&&P(this.ctx,a);c||this.reg.delete(a)}this.cache&&this.cache.remove(a);return this};
-function P(a,c){let b=0;if(a.constructor===Array)for(let d=0,e,g;d<a.length;d++){if((e=a[d])&&e.length)if(g=e.indexOf(c),0<=g){1<e.length?(e.splice(g,1),b++):delete a[d];break}else b++}else for(let d of a){const e=d[0],g=P(d[1],c);g?b+=g:a.delete(e)}return b};function I(a,c){if(!this||this.constructor!==I)return new I(a);if(a){var b="string"===typeof a?a:a.preset;b&&(a=Object.assign({},G[b],a))}else a={};b=a.context||{};const d=a.encode||a.encoder||F;this.encoder=d.encode?d:"object"===typeof d?new C(d):{encode:d};let e;this.resolution=a.resolution||9;this.tokenize=e=a.tokenize||"strict";this.depth="strict"===e&&b.depth||0;this.bidirectional=!1!==b.bidirectional;this.fastupdate=!!a.fastupdate;this.score=a.score||null;e=!1;this.map=new Map;this.ctx=new Map;
-this.reg=c||(this.fastupdate?new Map:new Set);this.A=b.resolution||1;this.rtl=d.rtl||a.rtl||!1;this.cache=(e=a.cache||null)&&new E(e)}I.prototype.clear=function(){this.map.clear();this.ctx.clear();this.reg.clear();this.cache&&this.cache.clear();return this};I.prototype.append=function(a,c){return this.add(a,c,!0)};I.prototype.contain=function(a){return this.reg.has(a)};I.prototype.update=function(a,c){const b=this,d=this.remove(a);return d&&d.then?d.then(()=>b.add(a,c)):this.add(a,c)};
-function Q(a){let c=0;if(a.constructor===Array)for(let b=0,d;b<a.length;b++)(d=a[b])&&(c+=d.length);else for(const b of a){const d=b[0],e=Q(b[1]);e?c+=e:a.delete(d)}return c}I.prototype.cleanup=function(){if(!this.fastupdate)return this;Q(this.map);this.depth&&Q(this.ctx);return this};
-I.prototype.searchCache=function(a,c,b){a=("object"===typeof a?""+a.query:a).toLowerCase();let d=this.cache.get(a);if(!d){d=this.search(a,c,b);if(d.then){const e=this;d.then(function(g){e.cache.set(a,g);return g})}this.cache.set(a,d)}return d};export default {Index:I,Charset:null,Encoder:C,Document:null,Worker:null,Resolver:null,IndexedDB:null,Language:{}};
-export const Index=I;export const Charset=null;export const Encoder=C;export const Document=null;export const Worker=null;export const Resolver=null;export const IndexedDB=null;export const Language={};
\ No newline at end of file
+var r;function u(a,c,b){const d=typeof b,e=typeof a;if("undefined"!==d){if("undefined"!==e){if(b){if("function"===e&&d===e)return function(h){return a(b(h))};c=a.constructor;if(c===b.constructor){if(c===Array)return b.concat(a);if(c===Map){var g=new Map(b);for(var f of a)g.set(f[0],f[1]);return g}if(c===Set){f=new Set(b);for(g of a.values())f.add(g);return f}}}return a}return b}return"undefined"===e?c:a}function x(){return Object.create(null)}function y(a,c){return c.length-a.length};const z=/[^\p{L}\p{N}]+/u,A=/(\d{3})/g,B=/(\D)(\d{3})/g,C=/(\d{3})(\D)/g,D="".normalize&&/[\u0300-\u036f]/g;function E(a){if(!this||this.constructor!==E)return new E(...arguments);for(let c=0;c<arguments.length;c++)this.assign(arguments[c])}r=E.prototype;
+r.assign=function(a){this.normalize=u(a.normalize,!0,this.normalize);let c=a.include,b=c||a.exclude||a.split;if("object"===typeof b){let d=!c,e="";a.include||(e+="\\p{Z}");b.letter&&(e+="\\p{L}");b.number&&(e+="\\p{N}",d=!!c);b.symbol&&(e+="\\p{S}");b.punctuation&&(e+="\\p{P}");b.control&&(e+="\\p{C}");if(b=b.char)e+="object"===typeof b?b.join(""):b;try{this.split=new RegExp("["+(c?"^":"")+e+"]+","u")}catch(g){this.split=/\s+/}this.numeric=d}else{try{this.split=u(b,z,this.split)}catch(d){this.split=
+/\s+/}this.numeric=u(this.numeric,!0)}this.prepare=u(a.prepare,null,this.prepare);this.finalize=u(a.finalize,null,this.finalize);this.rtl=a.rtl||!1;this.dedupe=u(a.dedupe,!0,this.dedupe);this.filter=u((b=a.filter)&&new Set(b),null,this.filter);this.matcher=u((b=a.matcher)&&new Map(b),null,this.matcher);this.mapper=u((b=a.mapper)&&new Map(b),null,this.mapper);this.stemmer=u((b=a.stemmer)&&new Map(b),null,this.stemmer);this.replacer=u(a.replacer,null,this.replacer);this.minlength=u(a.minlength,1,this.minlength);
+this.maxlength=u(a.maxlength,0,this.maxlength);if(this.cache=b=u(a.cache,!0,this.cache))this.l=null,this.v="number"===typeof b?b:2E5,this.h=new Map,this.j=new Map,this.o=this.m=128;this.g="";this.s=null;this.i="";this.u=null;if(this.matcher)for(const d of this.matcher.keys())this.g+=(this.g?"|":"")+d;if(this.stemmer)for(const d of this.stemmer.keys())this.i+=(this.i?"|":"")+d;return this};
+r.addMatcher=function(a,c){if("object"===typeof a)return this.addReplacer(a,c);if(2>a.length)return this.addMapper(a,c);this.matcher||(this.matcher=new Map);this.matcher.set(a,c);this.g+=(this.g?"|":"")+a;this.s=null;this.cache&&F(this);return this};r.addStemmer=function(a,c){this.stemmer||(this.stemmer=new Map);this.stemmer.set(a,c);this.i+=(this.i?"|":"")+a;this.u=null;this.cache&&F(this);return this};
+r.addFilter=function(a){this.filter||(this.filter=new Set);this.filter.add(a);this.cache&&F(this);return this};r.addMapper=function(a,c){if("object"===typeof a)return this.addReplacer(a,c);if(1<a.length)return this.addMatcher(a,c);this.mapper||(this.mapper=new Map);this.mapper.set(a,c);this.cache&&F(this);return this};r.addReplacer=function(a,c){"string"===typeof a&&(a=new RegExp(a,"g"));this.replacer||(this.replacer=[]);this.replacer.push(a,c||"");this.cache&&F(this);return this};
+function F(a){a.h.clear();a.j.clear()}
+r.encode=function(a){if(this.cache&&a.length<=this.m)if(this.l){if(this.h.has(a))return this.h.get(a)}else this.l=setTimeout(G,50,this);this.normalize&&(a="function"===typeof this.normalize?this.normalize(a):D?a.normalize("NFKD").replace(D,"").toLowerCase():a.toLowerCase());this.prepare&&(a=this.prepare(a));this.numeric&&3<a.length&&(a=a.replace(B,"$1 $2").replace(C,"$1 $2").replace(A,"$1 "));const c=!(this.dedupe||this.mapper||this.filter||this.matcher||this.stemmer||this.replacer);let b=[],d=this.split||
+""===this.split?a.split(this.split):a;for(let g=0,f,h;g<d.length;g++){if(!(f=h=d[g]))continue;if(f.length<this.minlength)continue;if(c){b.push(f);continue}if(this.filter&&this.filter.has(f))continue;if(this.cache&&f.length<=this.o)if(this.l){var e=this.j.get(f);if(e||""===e){e&&b.push(e);continue}}else this.l=setTimeout(G,50,this);let k;this.stemmer&&2<f.length&&(this.u||(this.u=new RegExp("(?!^)("+this.i+")$")),f=f.replace(this.u,l=>this.stemmer.get(l)),k=1);f&&k&&(f.length<this.minlength||this.filter&&
+this.filter.has(f))&&(f="");if(f&&(this.mapper||this.dedupe&&1<f.length)){e="";for(let l=0,t="",q,n;l<f.length;l++)q=f.charAt(l),q===t&&this.dedupe||((n=this.mapper&&this.mapper.get(q))||""===n?n===t&&this.dedupe||!(t=n)||(e+=n):e+=t=q);f=e}this.matcher&&1<f.length&&(this.s||(this.s=new RegExp("("+this.g+")","g")),f=f.replace(this.s,l=>this.matcher.get(l)));if(f&&this.replacer)for(e=0;f&&e<this.replacer.length;e+=2)f=f.replace(this.replacer[e],this.replacer[e+1]);this.cache&&h.length<=this.o&&(this.j.set(h,
+f),this.j.size>this.v&&(this.j.clear(),this.o=this.o/1.1|0));f&&b.push(f)}this.finalize&&(b=this.finalize(b)||b);this.cache&&a.length<=this.m&&(this.h.set(a,b),this.h.size>this.v&&(this.h.clear(),this.m=this.m/1.1|0));return b};function G(a){a.l=null;a.h.clear();a.j.clear()};function H(a){this.limit=a&&!0!==a?a:1E3;this.cache=new Map;this.g=""}H.prototype.set=function(a,c){this.cache.set(this.g=a,c);this.cache.size>this.limit&&this.cache.delete(this.cache.keys().next().value)};H.prototype.get=function(a){const c=this.cache.get(a);c&&this.g!==a&&(this.cache.delete(a),this.cache.set(this.g=a,c));return c};H.prototype.remove=function(a){for(const c of this.cache){const b=c[0];c[1].includes(a)&&this.cache.delete(b)}};
+H.prototype.clear=function(){this.cache.clear();this.g=""};const I={normalize:function(a){return a.toLowerCase()},dedupe:!1};const J={memory:{resolution:1},performance:{resolution:6,fastupdate:!0,context:{depth:1,resolution:3}},match:{tokenize:"forward"},score:{resolution:9,context:{depth:2,resolution:9}}};x();K.prototype.add=function(a,c,b,d){if(c&&(a||0===a)){if(!d&&!b&&this.reg.has(a))return this.update(a,c);c=this.encoder.encode(c);if(d=c.length){const l=x(),t=x(),q=this.depth,n=this.resolution;for(let m=0;m<d;m++){let p=c[this.rtl?d-1-m:m];var e=p.length;if(e&&(q||!t[p])){var g=this.score?this.score(c,p,m,null,0):L(n,d,m),f="";switch(this.tokenize){case "full":if(2<e){for(g=0;g<e;g++)for(var h=e;h>g;h--){f=p.substring(g,h);var k=this.score?this.score(c,p,m,f,g):L(n,d,m,e,g);M(this,t,f,k,a,b)}break}case "reverse":if(1<
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+function M(a,c,b,d,e,g,f){let h=f?a.ctx:a.map,k;if(!c[b]||f&&!(k=c[b])[f])f?(c=k||(c[b]=x()),c[f]=1,(k=h.get(f))?h=k:h.set(f,h=new Map)):c[b]=1,(k=h.get(b))?h=k:h.set(b,h=[]),h=h[d]||(h[d]=[]),g&&h.includes(e)||(h.push(e),a.fastupdate&&((c=a.reg.get(e))?c.push(h):a.reg.set(e,[h])))}function L(a,c,b,d,e){return b&&1<a?c+(d||0)<=a?b+(e||0):(a-1)/(c+(d||0))*(b+(e||0))+1|0:0};function N(a,c,b){if(1===a.length)return a=a[0],a=b||a.length>c?c?a.slice(b,b+c):a.slice(b):a;let d=[];for(let e=0,g,f;e<a.length;e++)if((g=a[e])&&(f=g.length)){if(b){if(b>=f){b-=f;continue}b<f&&(g=c?g.slice(b,b+c):g.slice(b),f=g.length,b=0)}if(d.length)f>c&&(g=g.slice(0,c),f=g.length),d.push(g);else{if(f>=c)return f>c&&(g=g.slice(0,c)),g;d=[g]}c-=f;if(!c)break}return d.length?d=1<d.length?[].concat.apply([],d):d[0]:d};K.prototype.search=function(a,c,b){b||(c||"object"!==typeof a?"object"===typeof c&&(b=c,c=0):(b=a,a=""));var d=[],e=0;if(b){a=b.query||a;c=b.limit||c;e=b.offset||0;var g=b.context;var f=b.suggest;var h=!0;var k=b.resolution}else h=!0;var l=this.encoder.encode(a);b=l.length;c||!h||(c=100);if(1===b)return O.call(this,l[0],"",c,e);g=this.depth&&!1!==g;if(2===b&&g&&!f)return O.call(this,l[0],l[1],c,e);let t=h=0;if(1<b){const n=x(),m=[];for(let p=0,v;p<b;p++)if((v=l[p])&&!n[v]){if(f||P(this,v))m.push(v),
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+function R(a,c){let b=0;if(a.constructor===Array)for(let d=0,e,g;d<a.length;d++){if((e=a[d])&&e.length)if(g=e.indexOf(c),0<=g){1<e.length?(e.splice(g,1),b++):delete a[d];break}else b++}else for(let d of a){const e=d[0],g=R(d[1],c);g?b+=g:a.delete(e)}return b};function K(a,c){if(!this||this.constructor!==K)return new K(a);if(a){var b="string"===typeof a?a:a.preset;b&&(a=Object.assign({},J[b],a))}else a={};b=a.context;const d=!0===b?{depth:1}:b||{},e=a.encode||a.encoder||I;this.encoder=e.encode?e:"object"===typeof e?new E(e):{encode:e};this.resolution=a.resolution||9;this.tokenize=b=a.tokenize||"strict";this.depth="strict"===b&&d.depth||0;this.bidirectional=!1!==d.bidirectional;this.fastupdate=!!a.fastupdate;this.score=a.score||null;b=!1;this.map=new Map;
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+function S(a){let c=0;if(a.constructor===Array)for(let b=0,d;b<a.length;b++)(d=a[b])&&(c+=d.length);else for(const b of a){const d=b[0],e=S(b[1]);e?c+=e:a.delete(d)}return c}r.cleanup=function(){if(!this.fastupdate)return this;S(this.map);this.depth&&S(this.ctx);return this};r.searchCache=function(a,c,b){a=("object"===typeof a?""+a.query:a).toLowerCase();let d=this.cache.get(a);if(!d){d=this.search(a,c,b);if(d.then){const e=this;d.then(function(g){e.cache.set(a,g);return g})}this.cache.set(a,d)}return d};export default {Index:K,Charset:null,Encoder:E,Document:null,Worker:null,Resolver:null,IndexedDB:null,Language:{}};
+export const Index=K;export const Charset=null;export const Encoder=E;export const Document=null;export const Worker=null;export const Resolver=null;export const IndexedDB=null;export const Language={};
\ No newline at end of file
diff --git a/dist/lang/de.min.js b/dist/lang/de.min.js
index f19ef2c..04ee0a1 100644
--- a/dist/lang/de.min.js
+++ b/dist/lang/de.min.js
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+!1!==d.fa;this.C=!!a.C;this.O=a.O||null;(b=a.ia||0)&&(this.ia=b);this.map=b?new Q(b):new Map;this.S=b?new Q(b):new Map;this.B=c||(this.C?b?new Q(b):new Map:b?new R(b):new Set);this.ja=d.K||3;this.rtl=e.rtl||a.rtl||!1;this.cache=(b=a.cache||null)&&new T(b);this.resolve=!1!==a.resolve;if(b=a.db)this.db=this.Y(b);this.na=!1!==a.commit;this.ga=[];this.h=null}A=L.prototype;A.Y=function(a){this.h&&(clearTimeout(this.h),this.h=null);return a.Y(this)};
+A.commit=function(a,c){this.h&&(clearTimeout(this.h),this.h=null);return this.db.commit(this,a,c)};function Ua(a){a.h||(a.h=setTimeout(function(){a.h=null;a.db.commit(a,void 0,void 0)},0))}A.clear=function(){this.map.clear();this.S.clear();this.B.clear();this.cache&&this.cache.clear();this.db&&(this.h&&clearTimeout(this.h),this.h=null,this.ga=[{clear:!0}]);return this};A.update=function(a,c){const b=this,d=this.remove(a);return d&&d.then?d.then(()=>b.add(a,c)):this.add(a,c)};
+A.import=function(a,c){if(c)switch(G(c)&&(c=JSON.parse(c)),a=a.split("."),"json"===a[a.length-1]&&a.pop(),a=1<a.length?a[1]:a[0],a){case "reg":this.C=!1;this.B=qa(c,this.B);break;case "map":this.map=oa(c,this.map);break;case "ctx":this.S=pa(c,this.S)}};na(L.prototype);const eb={prepare:function(a){return a.replace(/\u00b4`\u2019\u02bc/g,"'").replace(/_+/g," ").replace(/&/g," et ").replace(/\u20ac/g," EUR ").replace(/\bl'([^\b])/g,"la le $1").replace(/\bt'([^\b])/g,"ta te $1").replace(/\bc'([^\b])/g,"ca ce $1").replace(/\bd'([^\b])/g,"da de $1").replace(/\bj'([^\b])/g,"ja je $1").replace(/\bn'([^\b])/g,"na ne $1").replace(/\bm'([^\b])/g,"ma me $1").replace(/\bs'([^\b])/g,"sa se $1").replace(/\bau\b/g,"a le").replace(/\baux\b/g,"a les").replace(/\bdu\b/g,"de le").replace(/\bdes\b/g,
 "de les")},filter:new Set("au aux avec ce ces dans de des du elle en et eux il je la le leur lui ma mais me meme mes moi mon ne nos notre nous on ou par pas pour qu que qui sa se ses son sur ta te tes toi ton tu un une vos votre vous c d j l m n s t a y ete etee etees etes etant suis es est sommes etes sont serai seras sera serons serez seront serais serait serions seriez seraient etais etait etions etiez etaient fus fut fumes futes furent sois soit soyons soyez soient fusse fusses fut fussions fussiez fussent ayant eu eue eues eus ai as avons avez ont aurai auras aura aurons aurez auront aurais aurait aurions auriez auraient avais avait avions aviez avaient eut eumes eutes eurent aie aies ait ayons ayez aient eusse eusses eut eussions eussiez eussent ceci cela cela cet cette ici ils les leurs quel quels quelle quelles sans soi".split(" ")),
 stemmer:new Map([["lement",""],["ient",""],["nera",""],["ment",""],["ais",""],["ait",""],["ant",""],["ent",""],["iez",""],["ion",""],["nez",""],["ai",""],["es",""],["er",""],["ez",""],["le",""],["na",""],["ne",""],["a",""],["e",""]])};"undefined"!==typeof module&&module.exports?module.exports=eb:self.FlexSearch&&(self.FlexSearch.Language.fr=eb);}(this||self));
diff --git a/dist/module-debug/webpack.js b/dist/module-debug/bundle.js
similarity index 84%
rename from dist/module-debug/webpack.js
rename to dist/module-debug/bundle.js
index 444c329..d3507ce 100644
--- a/dist/module-debug/webpack.js
+++ b/dist/module-debug/bundle.js
@@ -1,5 +1,5 @@
 
-import { SearchOptions, ContextOptions, DocumentDescriptor, DocumentSearchOptions, DocumentIndexOptions, IndexOptions, DocumentOptions, TagOptions, StoreOptions, EncoderOptions, EncoderSplitOptions, PersistentOptions, ResolverOptions } from "./type.js";
+import { SearchOptions, ContextOptions, DocumentDescriptor, DocumentSearchOptions, FieldOptions, IndexOptions, DocumentOptions, TagOptions, StoreOptions, EncoderOptions, EncoderSplitOptions, PersistentOptions, ResolverOptions } from "./type.js";
 import StorageInterface from "./db/interface.js";
 import Document from "./document.js";
 import Index from "./index.js";
@@ -46,6 +46,14 @@ import Charset from "./charset.js";
 /** @export */Index.prototype.document;
 /** @export */Index.prototype.encoder;
 
+/** @export */Encoder.prototype.assign;
+/** @export */Encoder.prototype.encode;
+/** @export */Encoder.prototype.addMatcher;
+/** @export */Encoder.prototype.addStemmer;
+/** @export */Encoder.prototype.addFilter;
+/** @export */Encoder.prototype.addMapper;
+/** @export */Encoder.prototype.addReplacer;
+
 /** @export */Document.prototype.add;
 /** @export */Document.prototype.append;
 /** @export */Document.prototype.search;
@@ -76,6 +84,7 @@ import Charset from "./charset.js";
 /** @export */Resolver.prototype.and;
 /** @export */Resolver.prototype.xor;
 /** @export */Resolver.prototype.not;
+/** @export */Resolver.prototype.result;
 
 /** @export */StorageInterface.db;
 /** @export */StorageInterface.id;
@@ -118,25 +127,27 @@ import Charset from "./charset.js";
 /** @export */IndexOptions.cache;
 /** @export */IndexOptions.resolve;
 /** @export */IndexOptions.db;
-/** @export */IndexOptions.config;
+/** @export */IndexOptions.worker; // worker url
+/** @export */IndexOptions.config; // config url
 
-/** @export */DocumentIndexOptions.preset;
-/** @export */DocumentIndexOptions.context;
-/** @export */DocumentIndexOptions.encoder;
-/** @export */DocumentIndexOptions.encode;
-/** @export */DocumentIndexOptions.resolution;
-/** @export */DocumentIndexOptions.tokenize;
-/** @export */DocumentIndexOptions.fastupdate;
-/** @export */DocumentIndexOptions.score;
-/** @export */DocumentIndexOptions.keystore;
-/** @export */DocumentIndexOptions.rtl;
-/** @export */DocumentIndexOptions.cache;
-/** @export */DocumentIndexOptions.db;
-/** @export */DocumentIndexOptions.config;
-// /** @export */ DocumentIndexOptions.resolve;
-/** @export */DocumentIndexOptions.field;
-/** @export */DocumentIndexOptions.filter;
-/** @export */DocumentIndexOptions.custom;
+/** @export */FieldOptions.preset;
+/** @export */FieldOptions.context;
+/** @export */FieldOptions.encoder;
+/** @export */FieldOptions.encode;
+/** @export */FieldOptions.resolution;
+/** @export */FieldOptions.tokenize;
+/** @export */FieldOptions.fastupdate;
+/** @export */FieldOptions.score;
+/** @export */FieldOptions.keystore;
+/** @export */FieldOptions.rtl;
+/** @export */FieldOptions.cache;
+/** @export */FieldOptions.db;
+/** @export */FieldOptions.config;
+/** @export */FieldOptions.resolve;
+/** @export */FieldOptions.field;
+/** @export */FieldOptions.filter;
+/** @export */FieldOptions.custom;
+/** @export */FieldOptions.worker;
 
 /** @export */DocumentOptions.context;
 /** @export */DocumentOptions.encoder;
@@ -182,6 +193,7 @@ import Charset from "./charset.js";
 /** @export */SearchOptions.suggest;
 /** @export */SearchOptions.resolve;
 /** @export */SearchOptions.enrich;
+/** @export */SearchOptions.resolution;
 
 /** @export */DocumentSearchOptions.query;
 /** @export */DocumentSearchOptions.limit;
@@ -231,6 +243,10 @@ import Charset from "./charset.js";
 /** @export */ResolverOptions.enrich;
 /** @export */ResolverOptions.resolve;
 /** @export */ResolverOptions.suggest;
+/** @export */ResolverOptions.and;
+/** @export */ResolverOptions.or;
+/** @export */ResolverOptions.xor;
+/** @export */ResolverOptions.not;
 
 const FlexSearch = {
     Index: Index,
@@ -268,4 +284,8 @@ const FlexSearch = {
                 /** @export */
                 root.FlexSearch = FlexSearch;
             }
-}
\ No newline at end of file
+}
+
+
+export default FlexSearch;
+export { Index, Document, Encoder, Charset, WorkerIndex as Worker, Resolver, IdxDB as IndexedDB };
\ No newline at end of file
diff --git a/dist/module-debug/cache.js b/dist/module-debug/cache.js
index 9846d7a..07aeeb0 100644
--- a/dist/module-debug/cache.js
+++ b/dist/module-debug/cache.js
@@ -1,10 +1,11 @@
 import Index from "./index.js";
 import Document from "./document.js";
+import { SearchOptions, DocumentSearchOptions } from "./type.js";
 
 /**
- * @param {string|Object} query
- * @param {number|Object=} limit
- * @param {Object=} options
+ * @param {string|SearchOptions|DocumentSearchOptions} query
+ * @param {number|SearchOptions|DocumentSearchOptions=} limit
+ * @param {SearchOptions|DocumentSearchOptions=} options
  * @this {Index|Document}
  * @returns {Array<number|string>|Promise}
  */
diff --git a/dist/module-debug/charset/latin/soundex.js b/dist/module-debug/charset/latin/soundex.js
index 9766d70..c1ef7a2 100644
--- a/dist/module-debug/charset/latin/soundex.js
+++ b/dist/module-debug/charset/latin/soundex.js
@@ -1,6 +1,6 @@
 import { EncoderOptions } from "../../type.js";
 
-/** @type EncoderOptions */
+/** @type {EncoderOptions} */
 const options = {
     normalize: !0,
     dedupe: !1,
diff --git a/dist/module-debug/db/indexeddb/index.js b/dist/module-debug/db/indexeddb/index.js
index 14b83e8..42e8cf8 100644
--- a/dist/module-debug/db/indexeddb/index.js
+++ b/dist/module-debug/db/indexeddb/index.js
@@ -27,7 +27,7 @@ export default function IdxDB(name, config = {}) {
     }
     if ("object" == typeof name) {
         name = name.name;
-        config = name;
+        config = /** @type PersistentOptions */name;
     }
     if (!name) {
         console.info("Default storage space was used, because a name was not passed.");
diff --git a/dist/module-debug/document.js b/dist/module-debug/document.js
index 6e0b697..52289ed 100644
--- a/dist/module-debug/document.js
+++ b/dist/module-debug/document.js
@@ -6,7 +6,7 @@
  * https://github.com/nextapps-de/flexsearch
  */
 
-import { DocumentOptions, DocumentDescriptor, DocumentIndexOptions, StoreOptions } from "./type.js";
+import { IndexOptions, DocumentOptions, DocumentDescriptor, FieldOptions, StoreOptions } from "./type.js";
 import Index from "./index.js";
 import WorkerIndex from "./worker.js";
 import Cache, { searchCache } from "./cache.js";
@@ -29,8 +29,7 @@ export default function Document(options) {
         return new Document(options);
     }
 
-    /** @type DocumentDescriptor */
-    const document = options.document || options.doc || options;
+    const document = /** @type DocumentDescriptor */options.document || options.doc || options;
     let tmp, keystore;
 
     this.tree = [];
@@ -44,13 +43,14 @@ export default function Document(options) {
     this.reg = this.fastupdate ? keystore && /* tag? */ /* stringify */ /* stringify */ /* single param */ /* skip update: */ /* append: */ /* skip update: */ /* skip_update: */ /* skip deletion */!0 /*await rows.hasNext()*/ /*await rows.hasNext()*/ /*await rows.hasNext()*/ ? new KeystoreMap(keystore) : new Map() : keystore && !0 ? new KeystoreSet(keystore) : new Set();
 
     // todo support custom filter function
-    this.storetree = (tmp = document.store || null) && !0 !== tmp && [];
+    this.storetree = (tmp = document.store || null) && tmp && !0 !== tmp && [];
     this.store = tmp && (keystore && !0 ? new KeystoreMap(keystore) : new Map());
 
     this.cache = (tmp = options.cache || null) && new Cache(tmp);
     // do not apply cache again for the indexes since .searchCache()
     // is just a wrapper over .search()
-    options.cache = /* suggest */ /* append: */ /* enrich */!1;
+    options.cache =
+    /* suggest */ /* append: */ /* enrich */!1;
 
     this.worker = options.worker;
 
@@ -93,7 +93,6 @@ export default function Document(options) {
                         this.tagtree[i]._filter = params.filter;
                     }
                 }
-                // the tag fields needs to be hold by indices
                 this.tagfield[i] = field;
                 this.tag.set(field, new Map());
             }
@@ -136,7 +135,7 @@ Document.prototype.mount = function (db) {
             let index; // = this.index.get(field);
             //if(!index){
             // create raw index when not exists
-            this.index.set(field, index = new Index({}, this.reg));
+            this.index.set(field, index = new Index( /** @type IndexOptions */{}, this.reg));
             // copy and push to the field selection
             if (fields === this.field) {
                 fields = fields.slice(0);
@@ -227,7 +226,7 @@ function parse_descriptor(options, document) {
             key = key.field;
         }
 
-        opt = /** @type DocumentIndexOptions */is_object(opt) ? Object.assign({}, options, opt) : options;
+        opt = /** @type IndexOptions */is_object(opt) ? Object.assign({}, options, opt) : options;
 
         if (this.worker) {
             const worker = new WorkerIndex(opt);
@@ -242,7 +241,7 @@ function parse_descriptor(options, document) {
         }
 
         if (!this.worker) {
-            index.set(key, new Index(opt, this.reg));
+            index.set(key, new Index( /** @type IndexOptions */opt, this.reg));
         }
 
         if (opt.custom) {
diff --git a/dist/module-debug/document/search.js b/dist/module-debug/document/search.js
index f55b0a5..08ea788 100644
--- a/dist/module-debug/document/search.js
+++ b/dist/module-debug/document/search.js
@@ -1,6 +1,5 @@
 
-
-import { DocumentSearchOptions } from "../type.js";
+import { DocumentSearchOptions, DocumentSearchResults, EnrichedDocumentSearchResults, MergedDocumentSearchResults } from "../type.js";
 import { create_object, is_array, is_object, is_string, parse_simple } from "../common.js";
 import { intersect_union } from "../intersect.js";
 import Document from "../document.js";
@@ -12,7 +11,7 @@ let debug = /* suggest */ /* append: */ /* enrich */!1;
  * @param {number|DocumentSearchOptions=} limit
  * @param {DocumentSearchOptions=} options
  * @param {Array<Array>=} _promises For internal use only.
- * @returns {Promise|Array}
+ * @returns {DocumentSearchResults|EnrichedDocumentSearchResults|MergedDocumentSearchResults|Promise<DocumentSearchResults|EnrichedDocumentSearchResults|MergedDocumentSearchResults>}
  */
 
 Document.prototype.search = function (query, limit, options, _promises) {
@@ -43,7 +42,7 @@ Document.prototype.search = function (query, limit, options, _promises) {
     if (options) {
 
         if (is_array(options)) {
-            options = {
+            options = /** @type DocumentSearchOptions */{
                 index: options
             };
         }
@@ -363,9 +362,7 @@ Document.prototype.search = function (query, limit, options, _promises) {
         };
     }
 
-    if (enrich && /* tag? */ /* stringify */ /* stringify */ /* single param */ /* skip update: */ /* append: */ /* skip update: */ /* skip_update: */!0 /*await rows.hasNext()*/ /*await rows.hasNext()*/
-    /*await rows.hasNext()*/
-    && this.db && promises.length) {
+    if (enrich && /* tag? */ /* stringify */ /* stringify */ /* single param */ /* skip update: */ /* append: */ /* skip update: */ /* skip_update: */!0 /*await rows.hasNext()*/ /*await rows.hasNext()*/ /*await rows.hasNext()*/ && this.db && promises.length) {
         const self = this;
         return Promise.all(promises).then(function (promises) {
             for (let j = 0; j < promises.length; j++) {
@@ -390,6 +387,8 @@ function highlight_fields(result, query, index, field, tree, template) {
 
     // if(typeof template === "string"){
     //     template = new RegExp(template, "g");
+    // }
+
     let encoder, query_enc, tokenize;
 
 
diff --git a/dist/module-debug/index.js b/dist/module-debug/index.js
index 38bb78f..72ed87e 100644
--- a/dist/module-debug/index.js
+++ b/dist/module-debug/index.js
@@ -6,7 +6,7 @@
  * https://github.com/nextapps-de/flexsearch
  */
 
-import { IndexOptions, ContextOptions } from "./type.js";
+import { IndexOptions, ContextOptions, EncoderOptions } from "./type.js";
 import Encoder from "./encoder.js";
 import Cache, { searchCache } from "./cache.js";
 import Charset from "./charset.js";
@@ -33,19 +33,19 @@ export default function Index(options, _register) {
         return new Index(options);
     }
 
-    options = options ? apply_preset(options) : {};
+    options = /** @type IndexOptions */options ? apply_preset(options) : {};
 
+    let tmp = options.context;
     /** @type ContextOptions */
-    const context = options.context || {},
+    const context = /* tag? */ /* stringify */ /* stringify */ /* single param */ /* skip update: */ /* append: */ /* skip update: */ /* skip_update: */ /* skip deletion */!0 /*await rows.hasNext()*/ /*await rows.hasNext()*/ /*await rows.hasNext()*/ === tmp ? { depth: 1 } : tmp || {},
           encoder = is_string(options.encoder) ? Charset[options.encoder] : options.encode || options.encoder || default_encoder;
 
     /** @type Encoder */
-    this.encoder = encoder.encode ? encoder : "object" == typeof encoder ? new Encoder(encoder) : { encode: encoder };
+    this.encoder = encoder.encode ? encoder : "object" == typeof encoder ? new Encoder( /** @type {EncoderOptions} */encoder) : { encode: encoder };
 
     this.compress = options.compress || options.compression || /* suggest */ /* append: */ /* enrich */!1;
 
 
-    let tmp;
     this.resolution = options.resolution || 9;
     this.tokenize = tmp = options.tokenize || "strict";
     this.depth = "strict" === tmp && context.depth || 0;
@@ -56,10 +56,10 @@ export default function Index(options, _register) {
     tmp = options.keystore || 0;
     tmp && (this.keystore = tmp);
 
-    this.map = tmp && /* tag? */ /* stringify */ /* stringify */ /* single param */ /* skip update: */ /* append: */ /* skip update: */ /* skip_update: */ /* skip deletion */!0 /*await rows.hasNext()*/ /*await rows.hasNext()*/ /*await rows.hasNext()*/ ? new KeystoreMap(tmp) : new Map();
+    this.map = tmp && !0 ? new KeystoreMap(tmp) : new Map();
     this.ctx = tmp && !0 ? new KeystoreMap(tmp) : new Map();
     this.reg = _register || (this.fastupdate ? tmp && !0 ? new KeystoreMap(tmp) : new Map() : tmp && !0 ? new KeystoreSet(tmp) : new Set());
-    this.resolution_ctx = context.resolution || 1;
+    this.resolution_ctx = context.resolution || 3;
     this.rtl = encoder.rtl || options.rtl || !1;
 
     this.cache = (tmp = options.cache || null) && new Cache(tmp);
diff --git a/dist/module-debug/index/search.js b/dist/module-debug/index/search.js
index 0eca95b..e459b19 100644
--- a/dist/module-debug/index/search.js
+++ b/dist/module-debug/index/search.js
@@ -1,6 +1,6 @@
 
 
-import { SearchOptions } from "../type.js";
+import { SearchOptions, SearchResults, EnrichedSearchResults } from "../type.js";
 import { create_object, is_object, sort_by_length_down } from "../common.js";
 import Index from "../index.js";
 import default_compress from "../compress.js";
@@ -17,7 +17,7 @@ export function set_resolve(resolve) {
  * @param {string|SearchOptions} query
  * @param {number|SearchOptions=} limit
  * @param {SearchOptions=} options
- * @returns {Array|Resolver|Promise<Array|Resolver>}
+ * @returns {SearchResults|EnrichedSearchResults|Resolver|Promise<SearchResults|EnrichedSearchResults|Resolver>}
  */
 
 Index.prototype.search = function (query, limit, options) {
@@ -40,7 +40,8 @@ Index.prototype.search = function (query, limit, options) {
         resolve,
         enrich,
         tag,
-        boost;
+        boost,
+        resolution;
 
 
     if (options) {
@@ -53,6 +54,7 @@ Index.prototype.search = function (query, limit, options) {
         resolve || (global_resolve = 0);
         enrich = resolve && options.enrich;
         boost = options.boost;
+        resolution = options.resolution;
         tag = this.db && options.tag;
     } else {
         resolve = this.resolve || global_resolve;
@@ -62,13 +64,14 @@ Index.prototype.search = function (query, limit, options) {
 
     // do not force a string as input
     // https://github.com/nextapps-de/flexsearch/issues/432
-    query = /** @type {Array<string>} */this.encoder.encode(query);
-    length = query.length;
+    /** @type {Array<string>} */
+    let query_terms = this.encoder.encode(query);
+    length = query_terms.length;
     limit || !resolve || (limit = 100);
 
     // fast path single term
     if (1 === length) {
-        return single_term_query.call(this, query[0], // term
+        return single_term_query.call(this, query_terms[0], // term
         "", // ctx
         limit, offset, resolve, enrich, tag);
     }
@@ -80,8 +83,8 @@ Index.prototype.search = function (query, limit, options) {
 
     // fast path single context
     if (2 === length && context && !suggest) {
-        return single_term_query.call(this, query[0], // term
-        query[1], // ctx
+        return single_term_query.call(this, query_terms[0], // term
+        query_terms[1], // ctx
         limit, offset, resolve, enrich, tag);
     }
 
@@ -98,7 +101,7 @@ Index.prototype.search = function (query, limit, options) {
 
 
         // if(context){
-        //     keyword = query[0];
+        //     keyword = query_terms[0];
         //     dupes[keyword] = 1;
         //     query_new.push(keyword);
         //     maxlength = minlength = keyword.length;
@@ -107,7 +110,7 @@ Index.prototype.search = function (query, limit, options) {
 
         for (let i = 0, term; i < length; i++) {
 
-            term = query[i];
+            term = query_terms[i];
 
             if (term && !dupes[term]) {
 
@@ -132,7 +135,7 @@ Index.prototype.search = function (query, limit, options) {
             // }
         }
 
-        query = query_new;
+        query_terms = query_new;
         length = query.length;
     }
 
@@ -147,22 +150,22 @@ Index.prototype.search = function (query, limit, options) {
 
     // fast path single term
     if (1 === length) {
-        return single_term_query.call(this, query[0], // term
+        return single_term_query.call(this, query_terms[0], // term
         "", // ctx
         limit, offset, resolve, enrich, tag);
     }
 
     // fast path single context
     if (2 === length && context && !suggest) {
-        return single_term_query.call(this, query[0], // term
-        query[1], // ctx
+        return single_term_query.call(this, query_terms[0], // term
+        query_terms[1], // ctx
         limit, offset, resolve, enrich, tag);
     }
 
     if (1 < length) {
         if (context) {
             // start with context right away
-            keyword = query[0];
+            keyword = query_terms[0];
             index = 1;
         }
         // todo
@@ -171,17 +174,21 @@ Index.prototype.search = function (query, limit, options) {
                 // bigger terms has less occurrence
                 // this might also reduce the intersection task
                 // todo check intersection order
-                query.sort(sort_by_length_down);
+                query_terms.sort(sort_by_length_down);
             }
     }
 
+    if (!resolution && 0 !== resolution) {
+        resolution = this.resolution;
+    }
+
     // from this point there are just multi-term queries
 
     if (this.db) {
 
         if (this.db.search) {
             // when the configuration is not supported it returns false
-            const result = this.db.search(this, query, limit, offset, suggest, resolve, enrich, tag);
+            const result = this.db.search(this, query_terms, limit, offset, suggest, resolve, enrich, tag);
             if (!1 !== result) return result;
         }
 
@@ -190,7 +197,7 @@ Index.prototype.search = function (query, limit, options) {
 
             for (let arr, term; index < length; index++) {
 
-                term = query[index];
+                term = query_terms[index];
 
                 if (keyword) {
 
@@ -211,7 +218,7 @@ Index.prototype.search = function (query, limit, options) {
                 } else {
 
                     arr = await self.get_array(term, "", 0, 0, !1, !1);
-                    arr = add_result(arr, result, suggest, self.resolution
+                    arr = add_result(arr, result, suggest, resolution
                     // 0, // /** @type {!number} */ (limit),
                     // 0, // offset,
                     // length === 1
@@ -241,13 +248,13 @@ Index.prototype.search = function (query, limit, options) {
                 }
             }
 
-            return resolve ? intersect(result, self.resolution, /** @type {number} */limit, offset, suggest, boost, resolve) : new Resolver(result[0]);
+            return resolve ? intersect(result, resolution, /** @type {number} */limit, offset, suggest, boost, resolve) : new Resolver(result[0]);
         }();
     }
 
     for (let arr, term; index < length; index++) {
 
-        term = query[index];
+        term = query_terms[index];
 
         if (keyword) {
 
@@ -267,7 +274,7 @@ Index.prototype.search = function (query, limit, options) {
         } else {
 
             arr = this.get_array(term, "", 0, 0, !1, !1);
-            arr = /*this.*/add_result(arr, result, suggest, this.resolution
+            arr = /*this.*/add_result(arr, result, suggest, resolution
             // 0, // /** @type {!number} */ (limit),
             // 0, // offset,
             // length === 1
@@ -293,12 +300,12 @@ Index.prototype.search = function (query, limit, options) {
                 }
                 return result;
             } else if (1 === length) {
-                return resolve ? resolve_default(result[0], limit, offset) : new Resolver(result[0]);
+                return resolve ? resolve_default(result[0], /** @type {number} */limit, offset) : new Resolver(result[0]);
             }
         }
     }
 
-    result = intersect(result, this.resolution, limit, offset, suggest, boost, resolve);
+    result = intersect(result, resolution, limit, offset, suggest, boost, resolve);
 
     return resolve ? result : new Resolver(result);
 };
@@ -337,8 +344,8 @@ function single_term_query(term, keyword, limit, offset, resolve, enrich, tag) {
  * @private
  * @param {Array} arr
  * @param {Array} result
- * @param {Array} suggest
- * @param {number} resolution
+ * @param {boolean|null=} suggest
+ * @param {number=} resolution
  * @return {Array|boolean|undefined}
  */
 
diff --git a/dist/module-debug/lang/de.js b/dist/module-debug/lang/de.js
index 55eb8ef..6559526 100644
--- a/dist/module-debug/lang/de.js
+++ b/dist/module-debug/lang/de.js
@@ -14,7 +14,7 @@ export const filter = new Set(["aber", "als", "am", "an", "auch", "auf", "aus",
  * Example: The word "correct" and "correctness" could be the same word, so you can define {"ness": ""} to normalize the ending.
  * Object Definition: the key represents the word ending, the value contains the replacement (or empty string for removal).
  * http://snowball.tartarus.org/algorithms/german/stemmer.html
- * @type {Map<string>}
+ * @type {Map<string, string>}
  */
 
 export const stemmer = new Map([["niss", ""], ["isch", ""], ["lich", ""], ["heit", ""], ["keit", ""], ["ell", ""], ["bar", ""], ["end", ""], ["ung", ""], ["est", ""], ["ern", ""], ["em", ""], ["er", ""], ["en", ""], ["es", ""], ["st", ""], ["ig", ""], ["ik", ""], ["e", ""], ["s", ""]]);
@@ -22,7 +22,7 @@ export const stemmer = new Map([["niss", ""], ["isch", ""], ["lich", ""], ["heit
 /**
  * Matcher replaces all occurrences of a given string regardless of its position and is also a kind of "partial normalization".
  * Object Definition: the key represents the target term, the value contains the search string which should be replaced (could also be an array of multiple terms).
- * @type {Map<string>}
+ * @type {Map<string, string>}
  */
 const map = new Map([["_", " "], ["ä", "ae"], ["ö", "oe"], ["ü", "ue"], ["ß", "ss"], ["&", " und "], ["€", " EUR "]]),
       options = {
diff --git a/dist/module-debug/lang/fr.js b/dist/module-debug/lang/fr.js
index 51050f7..023f2f2 100644
--- a/dist/module-debug/lang/fr.js
+++ b/dist/module-debug/lang/fr.js
@@ -9,7 +9,7 @@ import { EncoderOptions } from "../type.js";
 export const filter = new Set(["au", "aux", "avec", "ce", "ces", "dans", "de", "des", "du", "elle", "en", "et", "eux", "il", "je", "la", "le", "leur", "lui", "ma", "mais", "me", "meme", "mes", "moi", "mon", "ne", "nos", "notre", "nous", "on", "ou", "par", "pas", "pour", "qu", "que", "qui", "sa", "se", "ses", "son", "sur", "ta", "te", "tes", "toi", "ton", "tu", "un", "une", "vos", "votre", "vous", "c", "d", "j", "l", "m", "n", "s", "t", "a", "y", "ete", "etee", "etees", "etes", "etant", "suis", "es", "est", "sommes", "etes", "sont", "serai", "seras", "sera", "serons", "serez", "seront", "serais", "serait", "serions", "seriez", "seraient", "etais", "etait", "etions", "etiez", "etaient", "fus", "fut", "fumes", "futes", "furent", "sois", "soit", "soyons", "soyez", "soient", "fusse", "fusses", "fut", "fussions", "fussiez", "fussent", "ayant", "eu", "eue", "eues", "eus", "ai", "as", "avons", "avez", "ont", "aurai", "auras", "aura", "aurons", "aurez", "auront", "aurais", "aurait", "aurions", "auriez", "auraient", "avais", "avait", "avions", "aviez", "avaient", "eut", "eumes", "eutes", "eurent", "aie", "aies", "ait", "ayons", "ayez", "aient", "eusse", "eusses", "eut", "eussions", "eussiez", "eussent", "ceci", "cela", "cela", "cet", "cette", "ici", "ils", "les", "leurs", "quel", "quels", "quelle", "quelles", "sans", "soi"]);
 
 /**
- * @type {Object<string, string>}
+ * @type {Map<string, string>}
  */
 
 export const stemmer = new Map([["lement", ""], ["ient", ""], ["nera", ""], ["ment", ""], ["ais", ""], ["ait", ""], ["ant", ""], ["ent", ""], ["iez", ""], ["ion", ""], ["nez", ""], ["ai", ""], ["es", ""], ["er", ""], ["ez", ""], ["le", ""], ["na", ""], ["ne", ""], ["a", ""], ["e", ""]]);
diff --git a/dist/module-debug/preset.js b/dist/module-debug/preset.js
index 7e740a3..550657e 100644
--- a/dist/module-debug/preset.js
+++ b/dist/module-debug/preset.js
@@ -3,7 +3,7 @@ import { is_string } from "./common.js";
 import { IndexOptions } from "./type.js";
 
 /**
- * @enum {Object}
+ * @type {Object<string, IndexOptions>}
  * @const
  */
 
@@ -38,20 +38,21 @@ const presets = {
 
 /**
  *
- * @param {!IndexOptions|string} options
+ * @param {IndexOptions|string} options
  * @return {IndexOptions}
  */
 
 export default function apply_preset(options) {
 
-    const preset = is_string(options) ? options : options.preset;
+    const preset = /** @type string */is_string(options) ? options : options.preset;
 
     if (preset) {
         if (!presets[preset]) {
             console.warn("Preset not found: " + preset);
         }
-        options = Object.assign({}, presets[preset], /** @type {Object} */options);
+        options = /** @type IndexOptions */Object.assign({}, presets[preset], /** @type {Object} */options);
     }
 
-    return options;
+    return (/** @type IndexOptions */options
+    );
 }
\ No newline at end of file
diff --git a/dist/module-debug/type.js b/dist/module-debug/type.js
index c9d87a9..e588373 100644
--- a/dist/module-debug/type.js
+++ b/dist/module-debug/type.js
@@ -5,230 +5,243 @@ import Encoder from "./encoder.js";
 import StorageInterface from "./db/interface.js";
 
 /**
- * @typedef IndexOptions {{
- *   preset: string|undefined,
+ * @typedef {{
+ *   preset: (string|undefined),
  *   context: (IndexOptions|undefined),
- *   encoder: Encoder|Function|Object|undefined,
- *   encode: Function|undefined,
- *   resolution: [number=9],
- *   tokenize: [string="strict"],
- *   fastupdate: [boolean:false],
- *   score: Function]|undefined,
- *   keystore: [number=0],
- *   rtl: [boolean=false],
- *   cache: [number=null],
- *   resolve: [boolean=true],
- *   db: StorageInterface|undefined,
- *   commit: boolean=true,
- *   worker: boolean|string|undefined,
- *   config: string|undefined
+ *   encoder: (Encoder|Function|Object|undefined),
+ *   encode: (Function|undefined),
+ *   resolution: (number|undefined),
+ *   tokenize: (string|undefined),
+ *   fastupdate: (boolean|undefined),
+ *   score: (function():number|undefined),
+ *   keystore: (number|undefined),
+ *   rtl: (boolean|undefined),
+ *   cache: (number|boolean|undefined),
+ *   resolve: (boolean|undefined),
+ *   db: (StorageInterface|undefined),
+ *   commit: (boolean|undefined),
+ *   worker: (string|undefined),
+ *   config: (string|undefined)
  * }}
  */
-export const IndexOptions = {};
+export let IndexOptions = {};
 
 /**
- * @typedef DocumentIndexOptions {{
- *   preset: string|undefined,
+ * @typedef {{
+ *   preset: (string|undefined),
  *   context: (IndexOptions|undefined),
- *   encoder: Encoder|Function|Object|undefined,
- *   encode: Function|undefined,
- *   resolution: [number=9],
- *   tokenize: [string="strict"],
- *   fastupdate: [boolean:false],
- *   score: Function]|undefined,
- *   keystore: [number=0],
- *   rtl: [boolean=false],
- *   cache: [number=null],
- *   db: StorageInterface|undefined,
- *   commit: boolean=true,
- *   config: string|undefined,
- *   field: string,
- *   filter: Function|undefined,
- *   custom: Function|undefined
+ *   encoder: (Encoder|Function|Object|undefined),
+ *   encode: (Function|undefined),
+ *   resolution: (number|undefined),
+ *   tokenize: (string|undefined),
+ *   fastupdate: (boolean|undefined),
+ *   score: (Function|undefined),
+ *   keystore: (number|undefined),
+ *   rtl: (boolean|undefined),
+ *   cache: (number|undefined),
+ *   db: (StorageInterface|undefined),
+ *   commit: (boolean|undefined),
+ *   config: (string|undefined),
+ *   field: (string|undefined),
+ *   filter: (Function|undefined),
+ *   custom: (Function|undefined)
  * }}
  */
-export const DocumentIndexOptions = {};
+export let FieldOptions = {};
 
 /**
- * @typedef DocumentOptions {{
+ * @typedef {{
  *   context: (IndexOptions|undefined),
- *   encoder: Encoder|Function|Object|undefined,
- *   encode: Function|undefined,
- *   resolution: [number=9],
- *   tokenize: [string="strict"],
- *   fastupdate: [boolean:false],
- *   score: Function]|undefined,
- *   keystore: [number=0],
- *   rtl: [boolean=false],
- *   cache: [number=null],
- *   db: StorageInterface|undefined,
- *   doc: DocumentDescriptor|Array<DocumentDescriptor>|undefined,
- *   document: DocumentDescriptor|Array<DocumentDescriptor>|undefined,
- *   worker: boolean|string|undefined
+ *   encoder: (Encoder|Function|Object|undefined),
+ *   encode: (Function|undefined),
+ *   resolution: (number|undefined),
+ *   tokenize: (string|undefined),
+ *   fastupdate: (boolean|undefined),
+ *   score: (Function|undefined),
+ *   keystore: (number|undefined),
+ *   rtl: (boolean|undefined),
+ *   cache: (number|boolean|undefined),
+ *   db: (StorageInterface|undefined),
+ *   doc: (DocumentDescriptor|Array<DocumentDescriptor>|undefined),
+ *   document: (DocumentDescriptor|Array<DocumentDescriptor>|undefined),
+ *   worker: (boolean|string|undefined),
  * }}
  */
-export const DocumentOptions = {};
+export let DocumentOptions = {};
 
 /**
- * @typedef ContextOptions {{
- *   depth: number,
- *   bidirectional: boolean|undefined,
- *   resolution: number|undefined
+ * @typedef {{
+ *   depth: (number|undefined),
+ *   bidirectional: (boolean|undefined),
+ *   resolution: (number|undefined),
  * }}
  */
-export const ContextOptions = {};
+export let ContextOptions = {};
 
 /**
- * @typedef DocumentDescriptor {{
- *   id: string="id",
- *   field: FieldOptions|Array<FieldOptions>|undefined,
- *   index: FieldOptions|Array<FieldOptions>|undefined,
- *   tag: TagOptions|Array<TagOptions>|undefined,
- *   store: StoreOptions|Array<StoreOptions>|undefined
+ * @typedef {{
+ *   id: (string|undefined),
+ *   field: (string|Array<string>|FieldOptions|Array<FieldOptions>|undefined),
+ *   index: (string|Array<string>|FieldOptions|Array<FieldOptions>|undefined),
+ *   tag: (string|Array<string>|TagOptions|Array<TagOptions>|undefined),
+ *   store: (string|Array<string>|StoreOptions|Array<StoreOptions>|boolean|undefined),
  * }}
  */
-export const DocumentDescriptor = {};
+export let DocumentDescriptor = {};
 
 /**
- * @typedef TagOptions {{
+ * @typedef {{
  *   field: string,
- *   tag: Object<string, string|Array<string>>|Array<string>|string,
- *   filter: Function|undefined,
- *   custom: Function|undefined,
- *   keystore: [number=0],
- *   db: StorageInterface|undefined,
- *   config: string|undefined
+ *   filter: ((function(string):boolean)|undefined),
+ *   custom: ((function(string):string)|undefined),
+ *   db: (StorageInterface|undefined),
  * }}
  */
-export const TagOptions = {};
+export let TagOptions = {};
 
 /**
- * @typedef StoreOptions {{
+ * @typedef {{
  *   field: string,
- *   filter: Function|undefined,
- *   custom: Function|undefined,
- *   config: string|undefined
+ *   filter: ((function(string):boolean)|undefined),
+ *   custom: ((function(string):string)|undefined)
  * }}
  */
-export const StoreOptions = {};
+export let StoreOptions = {};
 
 /**
- * @typedef SearchOptions {{
- *   query: string=,
- *   limit: [number=100],
- *   offset: [number=0],
- *   context: boolean|undefined,
- *   suggest: [boolean=false],
- *   resolve: [boolean=true],
- *   enrich: [boolean=false]
+ * @typedef {{
+ *   query: (string|undefined),
+ *   limit: (number|undefined),
+ *   offset: (number|undefined),
+ *   resolution: (number|undefined),
+ *   context: (boolean|undefined),
+ *   suggest: (boolean|undefined),
+ *   resolve: (boolean|undefined),
+ *   enrich: (boolean|undefined),
  * }}
  */
-export const SearchOptions = {};
-// tag: Array|undefined
+export let SearchOptions = {};
 
 /**
- * @typedef DocumentSearchOptions {{
- *   query: string=,
- *   limit: [number=100],
- *   offset: [number=0],
- *   context: boolean|undefined,
- *   suggest: [boolean=false],
- *   enrich: [boolean=false],
- *   tag: Object|Array<Object>|undefined,
- *   field: Array<DocumentSearchOptions>|undefined,
- *   index: Array<DocumentSearchOptions>|undefined,
- *   pluck: boolean|undefined,
- *   merge: [boolean=false],
- *   highlight: string|undefined
+ * @typedef {{
+ *   query: (string|undefined),
+ *   limit: (number|undefined),
+ *   offset: (number|undefined),
+ *   context: (boolean|undefined),
+ *   suggest: (boolean|undefined),
+ *   enrich: (boolean|undefined),
+ *   tag: (Object|Array<Object>|undefined),
+ *   field: (Array<string>|Array<DocumentSearchOptions>|string|undefined),
+ *   index: (Array<string>|Array<DocumentSearchOptions>|undefined),
+ *   pluck: (string|undefined),
+ *   merge: (boolean|undefined),
+ *   highlight: (string|undefined),
  * }}
  */
-export const DocumentSearchOptions = {};
+export let DocumentSearchOptions = {};
 
 /**
- * @typedef DocumentSearchResults Array<{{
- *   field: string|undefined,
- *   tag: string|undefined,
- *   result: Array<number|string>,
- *   highlight: string|undefined
- * }}>
+ * @typedef Array<number|string>
  */
-export const DocumentSearchResults = {};
+export let SearchResults = {};
 
 /**
- * @typedef EnrichedDocumentSearchResults Array<{{
- *   field: string|undefined,
- *   tag: string|undefined,
- *   result: Array<{{
- *      id: number|string,
- *      doc: Object
- *   }}>,
- *   highlight: string|undefined
- * }}>
+ * @typedef Array<{
+ *   id: (number|string),
+ *   res: number
+ * }>
  */
-export const EnrichedDocumentSearchResults = {};
+export let EnrichedSearchResults = {};
 
 /**
- * @typedef MergedDocumentSearchResults Array<{{
- *   id: number|string,
- *   doc: Object|undefined,
- *   field: Array<string>,
- *   highlight: string|undefined
- * }}>
+ * @typedef Array<{
+ *   field: (string|undefined),
+ *   tag: (string|undefined),
+ *   result: SearchResults
+ * }>
  */
-export const MergedDocumentSearchResults = {};
+export let DocumentSearchResults = {};
 
 /**
- * @typedef EncoderOptions {{
- *   rtl: boolean=false,
- *   dedupe: boolean=true,
- *   split: string|undefined,
- *   include: EncoderSplitOptions|undefined,
- *   exclude: EncoderSplitOptions|undefined,
- *   prepare: function(string):string|undefined,
- *   finalize: function(Array<>string>):Array<string>|undefined,
- *   filter: Set|undefined,
- *   matcher: Map|undefined,
- *   mapper: Map|undefined,
- *   stemmer: Map|undefined,
- *   replacer: Array<string|RegExp>|undefined,
- *   minlength: number=1,
- *   maxlength: number|undefined,
- *   cache: boolean=true,
+ * @typedef Array<{
+ *   field: (string|undefined),
+ *   tag: (string|undefined),
+ *   highlight: (string|undefined),
+ *   result: Array<{
+ *      id: (number|string),
+ *      doc: (Object|null)
+ *   }>
+ * }>
+ */
+export let EnrichedDocumentSearchResults = {};
+
+/**
+ * @typedef Array<{
+ *   id: (number|string),
+ *   doc: (Object|null),
+ *   field: (Array<string>|undefined),
+ *   tag: (Array<string>|undefined)
+ * }>
+ */
+export let MergedDocumentSearchResults = {};
+
+/**
+ * @typedef {{
+ *   letter: (boolean|undefined),
+ *   number: (boolean|undefined),
+ *   symbol: (boolean|undefined),
+ *   punctuation: (boolean|undefined),
+ *   control: (boolean|undefined),
+ *   char: (string|Array<string>|undefined)
  * }}
  */
-export const EncoderOptions = {};
+export let EncoderSplitOptions = {};
 
 /**
- * @typedef EncoderSplitOptions {{
- *   letter: boolean=false,
- *   number: boolean=false,
- *   symbol: boolean=false,
- *   punctuation: boolean=false,
- *   control: boolean=false,
- *   char: string|Array<string>|undefined,
+ * @typedef {{
+ *   rtl: (boolean|undefined),
+ *   dedupe: (boolean|undefined),
+ *   include: (EncoderSplitOptions|undefined),
+ *   exclude: (EncoderSplitOptions|undefined),
+ *   split: (string|boolean|undefined),
+ *   normalize: (boolean|(function(string):string)|undefined),
+ *   prepare: ((function(string):string)|undefined),
+ *   finalize: ((function(Array<string>):(Array<string>|void))|undefined),
+ *   filter: (Set<string>|undefined),
+ *   matcher: (Map<string, string>|undefined),
+ *   mapper: (Map<string, string>|undefined),
+ *   stemmer: (Map<string, string>|undefined),
+ *   replacer: (Array<string|RegExp, string>|undefined),
+ *   minlength: (number|undefined),
+ *   maxlength: (number|undefined),
+ *   cache: (boolean|undefined)
  * }}
  */
-export const EncoderSplitOptions = {};
+export let EncoderOptions = {};
 
 /**
- * @typedef PersistentOptions {{
- *   name: string="flexsearch",
- *   field: string|undefined,
- *   type: string|undefined,
- *   db: *|undefined
+ * @typedef {{
+ *   name: (string|undefined),
+ *   field: (string|undefined),
+ *   type: (string|undefined),
+ *   db: (StorageInterface|undefined)
  * }}
  */
-export const PersistentOptions = {};
+export let PersistentOptions = {};
 
 /**
- * @typedef ResolverOptions {{
- *   index: Index|undefined,
- *   query: string,
- *   limit: [number=0],
- *   offset: [number=0],
- *   enrich: boolean=false,
- *   resolve: boolean=false,
- *   suggest: boolean=false
+ * @typedef {{
+ *   index: (Index|undefined),
+ *   query: (string|undefined),
+ *   limit: (number|undefined),
+ *   offset: (number|undefined),
+ *   enrich: (boolean|undefined),
+ *   resolve: (boolean|undefined),
+ *   suggest: (boolean|undefined),
+ *   and: (ResolverOptions|Array<ResolverOptions>|undefined),
+ *   or: (ResolverOptions|Array<ResolverOptions>|undefined),
+ *   xor: (ResolverOptions|Array<ResolverOptions>|undefined),
+ *   not: (ResolverOptions|Array<ResolverOptions>|undefined)
  * }}
  */
-export const ResolverOptions = {};
\ No newline at end of file
+export let ResolverOptions = {};
\ No newline at end of file
diff --git a/dist/module-debug/worker.js b/dist/module-debug/worker.js
index 39ca44d..fa1feac 100644
--- a/dist/module-debug/worker.js
+++ b/dist/module-debug/worker.js
@@ -9,7 +9,7 @@ let pid = 0;
  * @constructor
  */
 
-export default function WorkerIndex(options = {}) {
+export default function WorkerIndex(options = /** @type IndexOptions */{}) {
 
     if (!this || this.constructor !== WorkerIndex) {
         return new WorkerIndex(options);
diff --git a/dist/module-debug/worker/handler.js b/dist/module-debug/worker/handler.js
index 8bc5fc1..4b77dc7 100644
--- a/dist/module-debug/worker/handler.js
+++ b/dist/module-debug/worker/handler.js
@@ -15,12 +15,12 @@ export default (async function (data) {
 
         case "init":
 
-            /** @type IndexOptions */
+            /** @type {IndexOptions} */
             let options = data.options || {},
                 filepath = options.config;
 
             if (filepath) {
-                options = filepath;
+                options = options;
                 // will be replaced after build with the line below because
                 // there is an issue with closure compiler dynamic import
                 options = (await import(filepath))["default"];
diff --git a/dist/module-min/bundle.js b/dist/module-min/bundle.js
new file mode 100644
index 0000000..9f4fbbe
--- /dev/null
+++ b/dist/module-min/bundle.js
@@ -0,0 +1 @@
+import{SearchOptions,ContextOptions,DocumentDescriptor,DocumentSearchOptions,FieldOptions,IndexOptions,DocumentOptions,TagOptions,StoreOptions,EncoderOptions,EncoderSplitOptions,PersistentOptions,ResolverOptions}from"./type.js";import StorageInterface from"./db/interface.js";import Document from"./document.js";import Index from"./index.js";import WorkerIndex from"./worker.js";import Resolver from"./resolver.js";import Encoder from"./encoder.js";import IdxDB from"./db/indexeddb/index.js";import Charset from"./charset.js";Index.prototype.add,Index.prototype.append,Index.prototype.search,Index.prototype.update,Index.prototype.remove,Index.prototype.contain,Index.prototype.clear,Index.prototype.cleanup,Index.prototype.searchCache,Index.prototype.addAsync,Index.prototype.appendAsync,Index.prototype.searchAsync,Index.prototype.updateAsync,Index.prototype.removeAsync,Index.prototype.export,Index.prototype.import,Index.prototype.serialize,Index.prototype.mount,Index.prototype.commit,Index.prototype.destroy,Index.prototype.reg,Index.prototype.map,Index.prototype.ctx,Index.prototype.db,Index.prototype.tag,Index.prototype.store,Index.prototype.depth,Index.prototype.bidirectional,Index.prototype.commit_task,Index.prototype.commit_timer,Index.prototype.cache,Index.prototype.bypass,Index.prototype.document,Index.prototype.encoder,Encoder.prototype.assign,Encoder.prototype.encode,Encoder.prototype.addMatcher,Encoder.prototype.addStemmer,Encoder.prototype.addFilter,Encoder.prototype.addMapper,Encoder.prototype.addReplacer,Document.prototype.add,Document.prototype.append,Document.prototype.search,Document.prototype.update,Document.prototype.remove,Document.prototype.contain,Document.prototype.clear,Document.prototype.cleanup,Document.prototype.addAsync,Document.prototype.appendAsync,Document.prototype.searchAsync,Document.prototype.updateAsync,Document.prototype.removeAsync,Document.prototype.mount,Document.prototype.commit,Document.prototype.destroy,Document.prototype.export,Document.prototype.import,Document.prototype.searchCache,Document.prototype.get,Document.prototype.set,Resolver.prototype.limit,Resolver.prototype.offset,Resolver.prototype.boost,Resolver.prototype.resolve,Resolver.prototype.or,Resolver.prototype.and,Resolver.prototype.xor,Resolver.prototype.not,Resolver.prototype.result,StorageInterface.db,StorageInterface.id,StorageInterface.support_tag_search,StorageInterface.prototype.mount,StorageInterface.prototype.open,StorageInterface.prototype.close,StorageInterface.prototype.destroy,StorageInterface.prototype.clear,StorageInterface.prototype.get,StorageInterface.prototype.tag,StorageInterface.prototype.enrich,StorageInterface.prototype.has,StorageInterface.prototype.search,StorageInterface.prototype.info,StorageInterface.prototype.commit,StorageInterface.prototype.remove,Charset.LatinExact,Charset.LatinDefault,Charset.LatinSimple,Charset.LatinBalance,Charset.LatinAdvanced,Charset.LatinExtra,Charset.LatinSoundex,Charset.ArabicDefault,Charset.CjkDefault,Charset.CyrillicDefault,IndexOptions.preset,IndexOptions.context,IndexOptions.encoder,IndexOptions.encode,IndexOptions.resolution,IndexOptions.tokenize,IndexOptions.fastupdate,IndexOptions.score,IndexOptions.keystore,IndexOptions.rtl,IndexOptions.cache,IndexOptions.resolve,IndexOptions.db,IndexOptions.worker,IndexOptions.config,FieldOptions.preset,FieldOptions.context,FieldOptions.encoder,FieldOptions.encode,FieldOptions.resolution,FieldOptions.tokenize,FieldOptions.fastupdate,FieldOptions.score,FieldOptions.keystore,FieldOptions.rtl,FieldOptions.cache,FieldOptions.db,FieldOptions.config,FieldOptions.resolve,FieldOptions.field,FieldOptions.filter,FieldOptions.custom,FieldOptions.worker,DocumentOptions.context,DocumentOptions.encoder,DocumentOptions.encode,DocumentOptions.resolution,DocumentOptions.tokenize,DocumentOptions.fastupdate,DocumentOptions.score,DocumentOptions.keystore,DocumentOptions.rtl,DocumentOptions.cache,DocumentOptions.db,DocumentOptions.doc,DocumentOptions.document,DocumentOptions.worker,ContextOptions.depth,ContextOptions.bidirectional,ContextOptions.resolution,DocumentDescriptor.field,DocumentDescriptor.index,DocumentDescriptor.tag,DocumentDescriptor.store,TagOptions.field,TagOptions.tag,TagOptions.filter,TagOptions.custom,TagOptions.keystore,TagOptions.db,TagOptions.config,StoreOptions.field,StoreOptions.filter,StoreOptions.custom,StoreOptions.config,SearchOptions.query,SearchOptions.limit,SearchOptions.offset,SearchOptions.context,SearchOptions.suggest,SearchOptions.resolve,SearchOptions.enrich,SearchOptions.resolution,DocumentSearchOptions.query,DocumentSearchOptions.limit,DocumentSearchOptions.offset,DocumentSearchOptions.context,DocumentSearchOptions.suggest,DocumentSearchOptions.enrich,DocumentSearchOptions.tag,DocumentSearchOptions.field,DocumentSearchOptions.index,DocumentSearchOptions.pluck,DocumentSearchOptions.merge,DocumentSearchOptions.highlight,EncoderOptions.rtl,EncoderOptions.dedupe,EncoderOptions.split,EncoderOptions.include,EncoderOptions.exclude,EncoderOptions.prepare,EncoderOptions.finalize,EncoderOptions.filter,EncoderOptions.matcher,EncoderOptions.mapper,EncoderOptions.stemmer,EncoderOptions.replacer,EncoderOptions.minlength,EncoderOptions.maxlength,EncoderOptions.cache,EncoderSplitOptions.letter,EncoderSplitOptions.number,EncoderSplitOptions.symbol,EncoderSplitOptions.punctuation,EncoderSplitOptions.control,EncoderSplitOptions.char,PersistentOptions.name,PersistentOptions.field,PersistentOptions.type,PersistentOptions.db,ResolverOptions.index,ResolverOptions.query,ResolverOptions.limit,ResolverOptions.offset,ResolverOptions.enrich,ResolverOptions.resolve,ResolverOptions.suggest,ResolverOptions.and,ResolverOptions.or,ResolverOptions.xor,ResolverOptions.not;const FlexSearch={Index:Index,Charset:Charset,Encoder:Encoder,Document:Document,Worker:WorkerIndex,Resolver:Resolver,IndexedDB:IdxDB,Language:{}};{FlexSearch.Language={};const a=self;let b;(b=a.define)&&b.amd?b([],function(){return FlexSearch}):"object"==typeof a.exports?a.exports=FlexSearch:a.FlexSearch=FlexSearch}export default FlexSearch;export{Index,Document,Encoder,Charset,WorkerIndex as Worker,Resolver,IdxDB as IndexedDB};
\ No newline at end of file
diff --git a/dist/module-min/cache.js b/dist/module-min/cache.js
index 0d2a783..4654995 100644
--- a/dist/module-min/cache.js
+++ b/dist/module-min/cache.js
@@ -1 +1 @@
-import Index from"./index.js";import Document from"./document.js";export function searchCache(a,b,c){a=("object"==typeof a?""+a.query:""+a).toLowerCase();let d=this.cache.get(a);if(!d){if(d=this.search(a,b,c),d.then){const b=this;d.then(function(c){return b.cache.set(a,c),c})}this.cache.set(a,d)}return d}export default function CacheClass(a){this.limit=a&&!0!==a?a:1000,this.cache=new Map,this.last=""}CacheClass.prototype.set=function(a,b){this.cache.set(this.last=a,b),this.cache.size>this.limit&&this.cache.delete(this.cache.keys().next().value)},CacheClass.prototype.get=function(a){const b=this.cache.get(a);return b&&this.last!==a&&(this.cache.delete(a),this.cache.set(this.last=a,b)),b},CacheClass.prototype.remove=function(a){for(const b of this.cache){const c=b[0],d=b[1];d.includes(a)&&this.cache.delete(c)}},CacheClass.prototype.clear=function(){this.cache.clear(),this.last=""};
\ No newline at end of file
+import Index from"./index.js";import Document from"./document.js";import{SearchOptions,DocumentSearchOptions}from"./type.js";export function searchCache(a,b,c){a=("object"==typeof a?""+a.query:""+a).toLowerCase();let d=this.cache.get(a);if(!d){if(d=this.search(a,b,c),d.then){const b=this;d.then(function(c){return b.cache.set(a,c),c})}this.cache.set(a,d)}return d}export default function CacheClass(a){this.limit=a&&!0!==a?a:1000,this.cache=new Map,this.last=""}CacheClass.prototype.set=function(a,b){this.cache.set(this.last=a,b),this.cache.size>this.limit&&this.cache.delete(this.cache.keys().next().value)},CacheClass.prototype.get=function(a){const b=this.cache.get(a);return b&&this.last!==a&&(this.cache.delete(a),this.cache.set(this.last=a,b)),b},CacheClass.prototype.remove=function(a){for(const b of this.cache){const c=b[0],d=b[1];d.includes(a)&&this.cache.delete(c)}},CacheClass.prototype.clear=function(){this.cache.clear(),this.last=""};
\ No newline at end of file
diff --git a/dist/module-min/document.js b/dist/module-min/document.js
index f05680d..b7950ca 100644
--- a/dist/module-min/document.js
+++ b/dist/module-min/document.js
@@ -1 +1 @@
-import{DocumentOptions,DocumentDescriptor,DocumentIndexOptions,StoreOptions}from"./type.js";import Index from"./index.js";import WorkerIndex from"./worker.js";import Cache,{searchCache}from"./cache.js";import{is_string,is_object,parse_simple}from"./common.js";import apply_async from"./async.js";import{exportDocument,importDocument}from"./serialize.js";import{KeystoreMap,KeystoreSet}from"./keystore.js";import"./document/add.js";import"./document/search.js";export default function Document(a){if(!this||this.constructor!==Document)return new Document(a);const b=a.document||a.doc||a;let c,d;if(this.tree=[],this.field=[],this.marker=[],this.key=(c=b.key||b.id)&&parse_tree(c,this.marker)||"id",d=a.keystore||0,d&&(this.keystore=d),this.fastupdate=!!a.fastupdate,this.reg=this.fastupdate?d&&!0?new KeystoreMap(d):new Map:d&&!0?new KeystoreSet(d):new Set,this.storetree=(c=b.store||null)&&!0!==c&&[],this.store=c&&(d&&!0?new KeystoreMap(d):new Map),this.cache=(c=a.cache||null)&&new Cache(c),a.cache=!1,this.worker=a.worker,this.index=parse_descriptor.call(this,a,b),(this.tag=null,(c=b.tag)&&("string"==typeof c&&(c=[c]),c.length))){this.tag=new Map,this.tagtree=[],this.tagfield=[];for(let a,b,d=0;d<c.length;d++){if(a=c[d],b=a.field||a,!b)throw new Error("The tag field from the document descriptor is undefined.");a.custom?this.tagtree[d]=a.custom:(this.tagtree[d]=parse_tree(b,this.marker),a.filter&&("string"==typeof this.tagtree[d]&&(this.tagtree[d]=new String(this.tagtree[d])),this.tagtree[d]._filter=a.filter)),this.tagfield[d]=b,this.tag.set(b,new Map)}}if(this.worker){const a=[];for(const b of this.index.values())b.then&&a.push(b);if(a.length){const b=this;return Promise.all(a).then(function(a){let c=0;for(const d of b.index.entries()){const e=d[0],f=d[1];f.then&&b.index.set(e,a[c++])}return b})}}else a.db&&this.mount(a.db)}Document.prototype.mount=function(a){let b=this.field;if(this.tag)for(let a,c=0;c<this.tagfield.length;c++){a=this.tagfield[c];let d;this.index.set(a,d=new Index({},this.reg)),b===this.field&&(b=b.slice(0)),b.push(a),d.tag=this.tag.get(a)}const c=[],d={db:a.db,type:a.type,fastupdate:a.fastupdate};for(let e,f,g=0;g<b.length;g++){d.field=f=b[g],e=this.index.get(f);const h=new a.constructor(a.id,d);h.id=a.id,c[g]=h.mount(e),e.document=!0,g?e.bypass=!0:e.store=this.store}return this.db=!0,Promise.all(c)},Document.prototype.commit=async function(a,b){const c=[];for(const d of this.index.values())c.push(d.db.commit(d,a,b));await Promise.all(c),this.reg.clear()},Document.prototype.destroy=function(){const a=[];for(const b of this.index.values())a.push(b.destroy());return Promise.all(a)};function parse_descriptor(a,b){const c=new Map;let d=b.index||b.field||b;is_string(d)&&(d=[d]);for(let e,f,g=0;g<d.length;g++){if(e=d[g],is_string(e)||(f=e,e=e.field),f=is_object(f)?Object.assign({},a,f):a,this.worker){const a=new WorkerIndex(f);a?c.set(e,a):this.worker=!1}this.worker||c.set(e,new Index(f,this.reg)),f.custom?this.tree[g]=f.custom:(this.tree[g]=parse_tree(e,this.marker),f.filter&&("string"==typeof this.tree[g]&&(this.tree[g]=new String(this.tree[g])),this.tree[g]._filter=f.filter)),this.field[g]=e}if(this.storetree){let a=b.store;is_string(a)&&(a=[a]);for(let b,c,d=0;d<a.length;d++)b=a[d],c=b.field||b,b.custom?(this.storetree[d]=b.custom,b.custom._field=c):(this.storetree[d]=parse_tree(c,this.marker),b.filter&&("string"==typeof this.storetree[d]&&(this.storetree[d]=new String(this.storetree[d])),this.storetree[d]._filter=b.filter))}return c}function parse_tree(a,b){const c=a.split(":");let d=0;for(let e=0;e<c.length;e++)a=c[e],"]"===a[a.length-1]&&(a=a.substring(0,a.length-2),a&&(b[d]=!0)),a&&(c[d++]=a);return d<c.length&&(c.length=d),1<d?c:c[0]}Document.prototype.append=function(a,b){return this.add(a,b,!0)},Document.prototype.update=function(a,b){return this.remove(a).add(a,b)},Document.prototype.remove=function(a){is_object(a)&&(a=parse_simple(a,this.key));for(const b of this.index.values())b.remove(a,!0);if(this.reg.has(a)){if(this.tag&&!this.fastupdate)for(let b of this.tag.values())for(let c of b){const d=c[0],e=c[1],f=e.indexOf(a);-1<f&&(1<e.length?e.splice(f,1):b.delete(d))}this.store&&this.store.delete(a),this.reg.delete(a)}return this.cache&&this.cache.remove(a),this},Document.prototype.clear=function(){for(const a of this.index.values())a.clear();if(this.tag)for(const a of this.tag.values())a.clear();return this.store&&this.store.clear(),this},Document.prototype.contain=function(a){return this.db?this.index.get(this.field[0]).db.has(a):this.reg.has(a)},Document.prototype.cleanup=function(){for(const a of this.index.values())a.cleanup();return this},Document.prototype.get=function(a){return this.db?this.index.get(this.field[0]).db.enrich(a).then(function(a){return a[0]&&a[0].doc}):this.store.get(a)},Document.prototype.set=function(a,b){return this.store.set(a,b),this},Document.prototype.searchCache=searchCache,Document.prototype.export=exportDocument,Document.prototype.import=importDocument,apply_async(Document.prototype);
\ No newline at end of file
+import{IndexOptions,DocumentOptions,DocumentDescriptor,FieldOptions,StoreOptions}from"./type.js";import Index from"./index.js";import WorkerIndex from"./worker.js";import Cache,{searchCache}from"./cache.js";import{is_string,is_object,parse_simple}from"./common.js";import apply_async from"./async.js";import{exportDocument,importDocument}from"./serialize.js";import{KeystoreMap,KeystoreSet}from"./keystore.js";import"./document/add.js";import"./document/search.js";export default function Document(a){if(!this||this.constructor!==Document)return new Document(a);const b=a.document||a.doc||a;let c,d;if(this.tree=[],this.field=[],this.marker=[],this.key=(c=b.key||b.id)&&parse_tree(c,this.marker)||"id",d=a.keystore||0,d&&(this.keystore=d),this.fastupdate=!!a.fastupdate,this.reg=this.fastupdate?d&&!0?new KeystoreMap(d):new Map:d&&!0?new KeystoreSet(d):new Set,this.storetree=(c=b.store||null)&&c&&!0!==c&&[],this.store=c&&(d&&!0?new KeystoreMap(d):new Map),this.cache=(c=a.cache||null)&&new Cache(c),a.cache=!1,this.worker=a.worker,this.index=parse_descriptor.call(this,a,b),(this.tag=null,(c=b.tag)&&("string"==typeof c&&(c=[c]),c.length))){this.tag=new Map,this.tagtree=[],this.tagfield=[];for(let a,b,d=0;d<c.length;d++){if(a=c[d],b=a.field||a,!b)throw new Error("The tag field from the document descriptor is undefined.");a.custom?this.tagtree[d]=a.custom:(this.tagtree[d]=parse_tree(b,this.marker),a.filter&&("string"==typeof this.tagtree[d]&&(this.tagtree[d]=new String(this.tagtree[d])),this.tagtree[d]._filter=a.filter)),this.tagfield[d]=b,this.tag.set(b,new Map)}}if(this.worker){const a=[];for(const b of this.index.values())b.then&&a.push(b);if(a.length){const b=this;return Promise.all(a).then(function(a){let c=0;for(const d of b.index.entries()){const e=d[0],f=d[1];f.then&&b.index.set(e,a[c++])}return b})}}else a.db&&this.mount(a.db)}Document.prototype.mount=function(a){let b=this.field;if(this.tag)for(let a,c=0;c<this.tagfield.length;c++){a=this.tagfield[c];let d;this.index.set(a,d=new Index({},this.reg)),b===this.field&&(b=b.slice(0)),b.push(a),d.tag=this.tag.get(a)}const c=[],d={db:a.db,type:a.type,fastupdate:a.fastupdate};for(let e,f,g=0;g<b.length;g++){d.field=f=b[g],e=this.index.get(f);const h=new a.constructor(a.id,d);h.id=a.id,c[g]=h.mount(e),e.document=!0,g?e.bypass=!0:e.store=this.store}return this.db=!0,Promise.all(c)},Document.prototype.commit=async function(a,b){const c=[];for(const d of this.index.values())c.push(d.db.commit(d,a,b));await Promise.all(c),this.reg.clear()},Document.prototype.destroy=function(){const a=[];for(const b of this.index.values())a.push(b.destroy());return Promise.all(a)};function parse_descriptor(a,b){const c=new Map;let d=b.index||b.field||b;is_string(d)&&(d=[d]);for(let e,f,g=0;g<d.length;g++){if(e=d[g],is_string(e)||(f=e,e=e.field),f=is_object(f)?Object.assign({},a,f):a,this.worker){const a=new WorkerIndex(f);a?c.set(e,a):this.worker=!1}this.worker||c.set(e,new Index(f,this.reg)),f.custom?this.tree[g]=f.custom:(this.tree[g]=parse_tree(e,this.marker),f.filter&&("string"==typeof this.tree[g]&&(this.tree[g]=new String(this.tree[g])),this.tree[g]._filter=f.filter)),this.field[g]=e}if(this.storetree){let a=b.store;is_string(a)&&(a=[a]);for(let b,c,d=0;d<a.length;d++)b=a[d],c=b.field||b,b.custom?(this.storetree[d]=b.custom,b.custom._field=c):(this.storetree[d]=parse_tree(c,this.marker),b.filter&&("string"==typeof this.storetree[d]&&(this.storetree[d]=new String(this.storetree[d])),this.storetree[d]._filter=b.filter))}return c}function parse_tree(a,b){const c=a.split(":");let d=0;for(let e=0;e<c.length;e++)a=c[e],"]"===a[a.length-1]&&(a=a.substring(0,a.length-2),a&&(b[d]=!0)),a&&(c[d++]=a);return d<c.length&&(c.length=d),1<d?c:c[0]}Document.prototype.append=function(a,b){return this.add(a,b,!0)},Document.prototype.update=function(a,b){return this.remove(a).add(a,b)},Document.prototype.remove=function(a){is_object(a)&&(a=parse_simple(a,this.key));for(const b of this.index.values())b.remove(a,!0);if(this.reg.has(a)){if(this.tag&&!this.fastupdate)for(let b of this.tag.values())for(let c of b){const d=c[0],e=c[1],f=e.indexOf(a);-1<f&&(1<e.length?e.splice(f,1):b.delete(d))}this.store&&this.store.delete(a),this.reg.delete(a)}return this.cache&&this.cache.remove(a),this},Document.prototype.clear=function(){for(const a of this.index.values())a.clear();if(this.tag)for(const a of this.tag.values())a.clear();return this.store&&this.store.clear(),this},Document.prototype.contain=function(a){return this.db?this.index.get(this.field[0]).db.has(a):this.reg.has(a)},Document.prototype.cleanup=function(){for(const a of this.index.values())a.cleanup();return this},Document.prototype.get=function(a){return this.db?this.index.get(this.field[0]).db.enrich(a).then(function(a){return a[0]&&a[0].doc}):this.store.get(a)},Document.prototype.set=function(a,b){return this.store.set(a,b),this},Document.prototype.searchCache=searchCache,Document.prototype.export=exportDocument,Document.prototype.import=importDocument,apply_async(Document.prototype);
\ No newline at end of file
diff --git a/dist/module-min/document/search.js b/dist/module-min/document/search.js
index 970b616..6f8658c 100644
--- a/dist/module-min/document/search.js
+++ b/dist/module-min/document/search.js
@@ -1 +1 @@
-import{DocumentSearchOptions}from"../type.js";import{create_object,is_array,is_object,is_string,parse_simple}from"../common.js";import{intersect_union}from"../intersect.js";import Document from"../document.js";let debug=!1;Document.prototype.search=function(a,b,c,d){debug,c||(!b&&is_object(a)?(c=a,a=""):is_object(b)&&(c=b,b=0));let e,f,g,h,j,k,l,m,n=[],o=[],p=0;if(c){if(is_array(c)&&(c={index:c}),a=c.query||a,e=c.pluck,g=c.merge,j=e||c.field||c.index,k=this.tag&&c.tag,f=this.store&&c.enrich,h=c.suggest,m=c.highlight,b=c.limit||b,l=c.offset||0,b||(b=100),k&&(!this.db||!d)){debug,k.constructor!==Array&&(k=[k]);let c=[];for(let a,b=0;b<k.length;b++)if(a=k[b],a.field&&a.tag){const b=a.tag;if(b.constructor===Array)for(let d=0;d<b.length;d++)c.push(a.field,b[d]);else c.push(a.field,b)}else{const b=Object.keys(a);for(let d,e,f=0;f<b.length;f++)if(d=b[f],e=a[d],e.constructor===Array)for(let a=0;a<e.length;a++)c.push(d,e[a]);else c.push(d,e)}if(k=c,!a){let a=[];if(c.length)for(let d=0;d<c.length;d+=2){let e;if(this.db){const g=this.index.get(c[d]);if(!g){continue}debug,a.push(e=g.db.tag(c[d+1],b,l,f))}else debug,e=get_tag.call(this,c[d],c[d+1],b,l,f);n.push({field:c[d],tag:c[d+1],result:e})}return a.length?Promise.all(a).then(function(a){for(let b=0;b<a.length;b++)n[b].result=a[b];return n}):n}}is_string(j)&&(j=[j])}j||(j=this.field);let q,r=!d&&(this.worker||this.db)&&[];for(let e,g,m,s=0;s<j.length;s++){if(g=j[s],this.db&&this.tag&&!this.tree[s])continue;let i;if(is_string(g)||(i=g,g=i.field,a=i.query||a,b=i.limit||b,l=i.offset||l,h=i.suggest||h,f=this.store&&(i.enrich||f)),d)e=d[s];else{let d=i||c,h=this.index.get(g);if(k&&(this.db&&(d.tag=k,q=h.db.support_tag_search,d.field=j),!q&&(d.enrich=!1)),r){r[s]=h.search(a,b,d),d&&f&&(d.enrich=f);continue}else e=h.search(a,b,d),d&&f&&(d.enrich=f)}if(m=e&&e.length,k&&m){const a=[];let b=0;if(!(this.db&&d))for(let c,d,e=0;e<k.length;e+=2){if(debug,c=this.tag.get(k[e]),!c)if(!1,h)continue;else return n;if(c=c&&c.get(k[e+1]),d=c&&c.length,d)b++,a.push(c);else if(!h)return n}else if(!q)for(let c=j.length;c<d.length;c++){let e=d[c],f=e&&e.length;if(f)b++,a.push(e);else if(!h)return n}if(b){if(debug,e=intersect_union(e,a),m=e.length,!m&&!h)return n;b--}}if(m)o[p]=g,n.push(e),p++;else if(1===j.length)return n}if(r){if(this.db&&k&&k.length&&!q)for(let a=0;a<k.length;a+=2){const c=this.index.get(k[a]);if(!c)if(!1,h)continue;else return n;debug,r.push(c.db.tag(k[a+1],b,l,!1))}const d=this;return Promise.all(r).then(function(e){return e.length?d.search(a,b,c,e):e})}if(!p)return n;if(e&&(!f||!this.store))return n[0];r=[];for(let g,h=0;h<o.length;h++){if(g=n[h],f&&g.length&&!g[0].doc&&(this.db?(debug,r.push(g=this.index.get(this.field[0]).db.enrich(g))):g.length&&(g=apply_enrich.call(this,g))),e)return g;n[h]={field:o[h],result:g}}if(f&&!0&&this.db&&r.length){const c=this;return Promise.all(r).then(function(d){for(let a=0;a<d.length;a++)n[a].result=d[a];return g?merge_fields(n,b,l):m?highlight_fields(n,a,c.index,c.field,c.tree,m,b,l):n})}return g?merge_fields(n,b,l):m?highlight_fields(n,a,this.index,this.field,this.tree,m,b,l):n};function highlight_fields(a,b,c,d,e,f){let g,h,j;for(let k,l,m,n,o,p=0;p<a.length;p++){k=a[p].result,l=a[p].field,n=c.get(l),m=n.encoder,j=n.tokenize,o=e[d.indexOf(l)],m!==g&&(g=m,h=g.encode(b));for(let a=0;a<k.length;a++){let b="",c=parse_simple(k[a].doc,o),d=g.encode(c),e=c.split(g.split);for(let a,c,g=0;g<d.length;g++){a=d[g],c=e[g];let i;for(let d,e=0;e<h.length;e++)if(d=h[e],"strict"!==j){const e=a.indexOf(d);if(-1<e){b+=(b?" ":"")+c.substring(0,e)+f.replace("$1",c.substring(e,d.length))+c.substring(e+d.length),i=!0;break}}else if(a===d){b+=(b?" ":"")+f.replace("$1",c),i=!0;break}i||(b+=(b?" ":"")+e[g])}k[a].highlight=b}}return a}function merge_fields(a,b){const c=[],d=create_object();for(let e,f,g=0;g<a.length;g++){e=a[g],f=e.result;for(let a,g,h,i=0;i<f.length;i++)if(g=f[i],a=g.id,h=d[a],!h){if(c.length===b)return c;g.field=d[a]=[e.field],c.push(g)}else h.push(e.field)}return c}function get_tag(a,b,c,d){let e=this.tag.get(a);if(!e)return!1,[];e=e&&e.get(b);e&&e.length-d}function apply_enrich(a){const b=Array(a.length);for(let c,d=0;d<a.length;d++)c=a[d],b[d]={id:c,doc:this.store.get(c)};return b}
\ No newline at end of file
+import{DocumentSearchOptions,DocumentSearchResults,EnrichedDocumentSearchResults,MergedDocumentSearchResults}from"../type.js";import{create_object,is_array,is_object,is_string,parse_simple}from"../common.js";import{intersect_union}from"../intersect.js";import Document from"../document.js";let debug=!1;Document.prototype.search=function(a,b,c,d){debug,c||(!b&&is_object(a)?(c=a,a=""):is_object(b)&&(c=b,b=0));let e,f,g,h,j,k,l,m,n=[],o=[],p=0;if(c){if(is_array(c)&&(c={index:c}),a=c.query||a,e=c.pluck,g=c.merge,j=e||c.field||c.index,k=this.tag&&c.tag,f=this.store&&c.enrich,h=c.suggest,m=c.highlight,b=c.limit||b,l=c.offset||0,b||(b=100),k&&(!this.db||!d)){debug,k.constructor!==Array&&(k=[k]);let c=[];for(let a,b=0;b<k.length;b++)if(a=k[b],a.field&&a.tag){const b=a.tag;if(b.constructor===Array)for(let d=0;d<b.length;d++)c.push(a.field,b[d]);else c.push(a.field,b)}else{const b=Object.keys(a);for(let d,e,f=0;f<b.length;f++)if(d=b[f],e=a[d],e.constructor===Array)for(let a=0;a<e.length;a++)c.push(d,e[a]);else c.push(d,e)}if(k=c,!a){let a=[];if(c.length)for(let d=0;d<c.length;d+=2){let e;if(this.db){const g=this.index.get(c[d]);if(!g){continue}debug,a.push(e=g.db.tag(c[d+1],b,l,f))}else debug,e=get_tag.call(this,c[d],c[d+1],b,l,f);n.push({field:c[d],tag:c[d+1],result:e})}return a.length?Promise.all(a).then(function(a){for(let b=0;b<a.length;b++)n[b].result=a[b];return n}):n}}is_string(j)&&(j=[j])}j||(j=this.field);let q,r=!d&&(this.worker||this.db)&&[];for(let e,g,m,s=0;s<j.length;s++){if(g=j[s],this.db&&this.tag&&!this.tree[s])continue;let i;if(is_string(g)||(i=g,g=i.field,a=i.query||a,b=i.limit||b,l=i.offset||l,h=i.suggest||h,f=this.store&&(i.enrich||f)),d)e=d[s];else{let d=i||c,h=this.index.get(g);if(k&&(this.db&&(d.tag=k,q=h.db.support_tag_search,d.field=j),!q&&(d.enrich=!1)),r){r[s]=h.search(a,b,d),d&&f&&(d.enrich=f);continue}else e=h.search(a,b,d),d&&f&&(d.enrich=f)}if(m=e&&e.length,k&&m){const a=[];let b=0;if(!(this.db&&d))for(let c,d,e=0;e<k.length;e+=2){if(debug,c=this.tag.get(k[e]),!c)if(!1,h)continue;else return n;if(c=c&&c.get(k[e+1]),d=c&&c.length,d)b++,a.push(c);else if(!h)return n}else if(!q)for(let c=j.length;c<d.length;c++){let e=d[c],f=e&&e.length;if(f)b++,a.push(e);else if(!h)return n}if(b){if(debug,e=intersect_union(e,a),m=e.length,!m&&!h)return n;b--}}if(m)o[p]=g,n.push(e),p++;else if(1===j.length)return n}if(r){if(this.db&&k&&k.length&&!q)for(let a=0;a<k.length;a+=2){const c=this.index.get(k[a]);if(!c)if(!1,h)continue;else return n;debug,r.push(c.db.tag(k[a+1],b,l,!1))}const d=this;return Promise.all(r).then(function(e){return e.length?d.search(a,b,c,e):e})}if(!p)return n;if(e&&(!f||!this.store))return n[0];r=[];for(let g,h=0;h<o.length;h++){if(g=n[h],f&&g.length&&!g[0].doc&&(this.db?(debug,r.push(g=this.index.get(this.field[0]).db.enrich(g))):g.length&&(g=apply_enrich.call(this,g))),e)return g;n[h]={field:o[h],result:g}}if(f&&!0&&this.db&&r.length){const c=this;return Promise.all(r).then(function(d){for(let a=0;a<d.length;a++)n[a].result=d[a];return g?merge_fields(n,b,l):m?highlight_fields(n,a,c.index,c.field,c.tree,m,b,l):n})}return g?merge_fields(n,b,l):m?highlight_fields(n,a,this.index,this.field,this.tree,m,b,l):n};function highlight_fields(a,b,c,d,e,f){let g,h,j;for(let k,l,m,n,o,p=0;p<a.length;p++){k=a[p].result,l=a[p].field,n=c.get(l),m=n.encoder,j=n.tokenize,o=e[d.indexOf(l)],m!==g&&(g=m,h=g.encode(b));for(let a=0;a<k.length;a++){let b="",c=parse_simple(k[a].doc,o),d=g.encode(c),e=c.split(g.split);for(let a,c,g=0;g<d.length;g++){a=d[g],c=e[g];let i;for(let d,e=0;e<h.length;e++)if(d=h[e],"strict"!==j){const e=a.indexOf(d);if(-1<e){b+=(b?" ":"")+c.substring(0,e)+f.replace("$1",c.substring(e,d.length))+c.substring(e+d.length),i=!0;break}}else if(a===d){b+=(b?" ":"")+f.replace("$1",c),i=!0;break}i||(b+=(b?" ":"")+e[g])}k[a].highlight=b}}return a}function merge_fields(a,b){const c=[],d=create_object();for(let e,f,g=0;g<a.length;g++){e=a[g],f=e.result;for(let a,g,h,i=0;i<f.length;i++)if(g=f[i],a=g.id,h=d[a],!h){if(c.length===b)return c;g.field=d[a]=[e.field],c.push(g)}else h.push(e.field)}return c}function get_tag(a,b,c,d){let e=this.tag.get(a);if(!e)return!1,[];e=e&&e.get(b);e&&e.length-d}function apply_enrich(a){const b=Array(a.length);for(let c,d=0;d<a.length;d++)c=a[d],b[d]={id:c,doc:this.store.get(c)};return b}
\ No newline at end of file
diff --git a/dist/module-min/index.js b/dist/module-min/index.js
index 5fe0587..4348180 100644
--- a/dist/module-min/index.js
+++ b/dist/module-min/index.js
@@ -1 +1 @@
-import{IndexOptions,ContextOptions}from"./type.js";import Encoder from"./encoder.js";import Cache,{searchCache}from"./cache.js";import Charset from"./charset.js";import{KeystoreMap,KeystoreSet}from"./keystore.js";import{is_array,is_string}from"./common.js";import{exportIndex,importIndex,serialize}from"./serialize.js";import default_encoder from"./charset/latin/default.js";import apply_preset from"./preset.js";import apply_async from"./async.js";import tick from"./profiler.js";import"./index/add.js";import"./index/search.js";import"./index/remove.js";export default function Index(a,b){if(!this||this.constructor!==Index)return new Index(a);!1,a=a?apply_preset(a):{};const c=a.context||{},d=is_string(a.encoder)?Charset[a.encoder]:a.encode||a.encoder||default_encoder;this.encoder=d.encode?d:"object"==typeof d?new Encoder(d):{encode:d},this.compress=a.compress||a.compression||!1;let e;this.resolution=a.resolution||9,this.tokenize=e=a.tokenize||"strict",this.depth="strict"===e&&c.depth||0,this.bidirectional=!1!==c.bidirectional,this.fastupdate=!!a.fastupdate,this.score=a.score||null,e=a.keystore||0,e&&(this.keystore=e),this.map=e&&!0?new KeystoreMap(e):new Map,this.ctx=e&&!0?new KeystoreMap(e):new Map,this.reg=b||(this.fastupdate?e&&!0?new KeystoreMap(e):new Map:e&&!0?new KeystoreSet(e):new Set),this.resolution_ctx=c.resolution||1,this.rtl=d.rtl||a.rtl||!1,this.cache=(e=a.cache||null)&&new Cache(e),this.resolve=!1!==a.resolve,(e=a.db)&&(this.db=this.mount(e)),this.commit_auto=!1!==a.commit,this.commit_task=[],this.commit_timer=null}Index.prototype.mount=function(a){return this.commit_timer&&(clearTimeout(this.commit_timer),this.commit_timer=null),a.mount(this)},Index.prototype.commit=function(a,b){return this.commit_timer&&(clearTimeout(this.commit_timer),this.commit_timer=null),this.db.commit(this,a,b)},Index.prototype.destroy=function(){return this.commit_timer&&(clearTimeout(this.commit_timer),this.commit_timer=null),this.db.destroy()};export function autoCommit(a,b,c){a.commit_timer||(a.commit_timer=setTimeout(function(){a.commit_timer=null,a.db.commit(a,b,c)},0))}Index.prototype.clear=function(){return this.map.clear(),this.ctx.clear(),this.reg.clear(),this.cache&&this.cache.clear(),this.db&&(this.commit_timer&&clearTimeout(this.commit_timer),this.commit_timer=null,this.commit_task=[{clear:!0}]),this},Index.prototype.append=function(a,b){return this.add(a,b,!0)},Index.prototype.contain=function(a){return this.db?this.db.has(a):this.reg.has(a)},Index.prototype.update=function(a,b){const c=this,d=this.remove(a);return d&&d.then?d.then(()=>c.add(a,b)):this.add(a,b)};function cleanup_index(a){let b=0;if(is_array(a))for(let c,d=0;d<a.length;d++)(c=a[d])&&(b+=c.length);else for(const c of a){const d=c[0],e=c[1],f=cleanup_index(e);f?b+=f:a.delete(d)}return b}Index.prototype.cleanup=function(){return this.fastupdate?(cleanup_index(this.map),this.depth&&cleanup_index(this.ctx),this):(!1,this)},Index.prototype.searchCache=searchCache,Index.prototype.export=exportIndex,Index.prototype.import=importIndex,Index.prototype.serialize=serialize,apply_async(Index.prototype);
\ No newline at end of file
+import{IndexOptions,ContextOptions,EncoderOptions}from"./type.js";import Encoder from"./encoder.js";import Cache,{searchCache}from"./cache.js";import Charset from"./charset.js";import{KeystoreMap,KeystoreSet}from"./keystore.js";import{is_array,is_string}from"./common.js";import{exportIndex,importIndex,serialize}from"./serialize.js";import default_encoder from"./charset/latin/default.js";import apply_preset from"./preset.js";import apply_async from"./async.js";import tick from"./profiler.js";import"./index/add.js";import"./index/search.js";import"./index/remove.js";export default function Index(a,b){if(!this||this.constructor!==Index)return new Index(a);!1,a=a?apply_preset(a):{};let c=a.context;const d=!0===c?{depth:1}:c||{},e=is_string(a.encoder)?Charset[a.encoder]:a.encode||a.encoder||default_encoder;this.encoder=e.encode?e:"object"==typeof e?new Encoder(e):{encode:e},this.compress=a.compress||a.compression||!1,this.resolution=a.resolution||9,this.tokenize=c=a.tokenize||"strict",this.depth="strict"===c&&d.depth||0,this.bidirectional=!1!==d.bidirectional,this.fastupdate=!!a.fastupdate,this.score=a.score||null,c=a.keystore||0,c&&(this.keystore=c),this.map=c&&!0?new KeystoreMap(c):new Map,this.ctx=c&&!0?new KeystoreMap(c):new Map,this.reg=b||(this.fastupdate?c&&!0?new KeystoreMap(c):new Map:c&&!0?new KeystoreSet(c):new Set),this.resolution_ctx=d.resolution||3,this.rtl=e.rtl||a.rtl||!1,this.cache=(c=a.cache||null)&&new Cache(c),this.resolve=!1!==a.resolve,(c=a.db)&&(this.db=this.mount(c)),this.commit_auto=!1!==a.commit,this.commit_task=[],this.commit_timer=null}Index.prototype.mount=function(a){return this.commit_timer&&(clearTimeout(this.commit_timer),this.commit_timer=null),a.mount(this)},Index.prototype.commit=function(a,b){return this.commit_timer&&(clearTimeout(this.commit_timer),this.commit_timer=null),this.db.commit(this,a,b)},Index.prototype.destroy=function(){return this.commit_timer&&(clearTimeout(this.commit_timer),this.commit_timer=null),this.db.destroy()};export function autoCommit(a,b,c){a.commit_timer||(a.commit_timer=setTimeout(function(){a.commit_timer=null,a.db.commit(a,b,c)},0))}Index.prototype.clear=function(){return this.map.clear(),this.ctx.clear(),this.reg.clear(),this.cache&&this.cache.clear(),this.db&&(this.commit_timer&&clearTimeout(this.commit_timer),this.commit_timer=null,this.commit_task=[{clear:!0}]),this},Index.prototype.append=function(a,b){return this.add(a,b,!0)},Index.prototype.contain=function(a){return this.db?this.db.has(a):this.reg.has(a)},Index.prototype.update=function(a,b){const c=this,d=this.remove(a);return d&&d.then?d.then(()=>c.add(a,b)):this.add(a,b)};function cleanup_index(a){let b=0;if(is_array(a))for(let c,d=0;d<a.length;d++)(c=a[d])&&(b+=c.length);else for(const c of a){const d=c[0],e=c[1],f=cleanup_index(e);f?b+=f:a.delete(d)}return b}Index.prototype.cleanup=function(){return this.fastupdate?(cleanup_index(this.map),this.depth&&cleanup_index(this.ctx),this):(!1,this)},Index.prototype.searchCache=searchCache,Index.prototype.export=exportIndex,Index.prototype.import=importIndex,Index.prototype.serialize=serialize,apply_async(Index.prototype);
\ No newline at end of file
diff --git a/dist/module-min/index/search.js b/dist/module-min/index/search.js
index 1c1ca25..c759e3f 100644
--- a/dist/module-min/index/search.js
+++ b/dist/module-min/index/search.js
@@ -1 +1 @@
-import{SearchOptions}from"../type.js";import{create_object,is_object,sort_by_length_down}from"../common.js";import Index from"../index.js";import default_compress from"../compress.js";import Resolver from"../resolver.js";import{intersect}from"../intersect.js";import resolve_default from"../resolve/default.js";let global_resolve=1;export function set_resolve(a){global_resolve=a}Index.prototype.search=function(a,b,c){c||(!b&&is_object(a)?(c=a,a=""):is_object(b)&&(c=b,b=0));let d,e,f,g,h,i,j,k=[],l=0;if(c?(a=c.query||a,b=c.limit||b,l=c.offset||0,e=c.context,f=c.suggest,g=global_resolve&&!1!==c.resolve,g||(global_resolve=0),h=g&&c.enrich,j=c.boost,i=this.db&&c.tag):g=this.resolve||global_resolve,a=this.encoder.encode(a),d=a.length,b||!g||(b=100),1===d)return single_term_query.call(this,a[0],"",b,l,g,h,i);if(e=this.depth&&!1!==e,2===d&&e&&!f)return single_term_query.call(this,a[0],a[1],b,l,g,h,i);let m=0,n=0;if(1<d){const b=create_object(),c=[];for(let e,h=0;h<d;h++)if(e=a[h],e&&!b[e]){if(!f&&!this.db&&!this.get_array(e))return g?k:new Resolver(k);c.push(e),b[e]=1;const a=e.length;m=Math.max(m,a),n=n?Math.min(n,a):a}a=c,d=a.length}if(!d)return g?k:new Resolver(k);let o,p=0;if(1===d)return single_term_query.call(this,a[0],"",b,l,g,h,i);if(2===d&&e&&!f)return single_term_query.call(this,a[0],a[1],b,l,g,h,i);if(1<d&&(e?(o=a[0],p=1):9<m&&3<m/n&&a.sort(sort_by_length_down)),this.db){if(this.db.search){const c=this.db.search(this,a,b,l,f,g,h,i);if(!1!==c)return c}const c=this;return async function(){for(let e,h;p<d;p++){if(h=a[p],o?(e=await c.get_array(h,o,0,0,!1,!1),e=add_result(e,k,f,c.resolution_ctx),(!f||!1!==e||!k.length)&&(o=h)):(e=await c.get_array(h,"",0,0,!1,!1),e=add_result(e,k,f,c.resolution)),e)return e;if(f&&p==d-1){let a=k.length;if(!a){if(o){o="",p=-1;continue}return k}if(1===a)return g?resolve_default(k[0],b,l):new Resolver(k[0])}}return g?intersect(k,c.resolution,b,l,f,j,g):new Resolver(k[0])}()}for(let e,h;p<d;p++){if(h=a[p],o?(e=this.get_array(h,o,0,0,!1,!1),e=add_result(e,k,f,this.resolution_ctx),(!f||!1!==e||!k.length)&&(o=h)):(e=this.get_array(h,"",0,0,!1,!1),e=add_result(e,k,f,this.resolution)),e)return e;if(f&&p==d-1){const a=k.length;if(!a){if(o){o="",p=-1;continue}return k}if(1===a)return g?resolve_default(k[0],b,l):new Resolver(k[0])}}return k=intersect(k,this.resolution,b,l,f,j,g),g?k:new Resolver(k)};function single_term_query(a,b,c,d,e,f,g){const h=this.get_array(a,b,c,d,e,f,g);return this.db?h.then(function(a){return e?a:a&&a.length?e?resolve_default(a,c,d):new Resolver(a):e?[]:new Resolver([])}):h&&h.length?e?resolve_default(h,c,d):new Resolver(h):e?[]:new Resolver([])}function add_result(a,b,c,d){let e=[];if(a){d=Math.min(a.length,d);for(let b,c=0;c<d;c++)(b=a[c])&&b&&(e[c]=b);if(e.length)return void b.push(e)}return!c&&e}Index.prototype.get_array=function(a,b,c,d,e,f,g){let h,i;return(b&&(i=this.bidirectional&&a>b),this.compress&&(a=default_compress(a),b&&(b=default_compress(b))),this.db)?b?this.db.get(i?b:a,i?a:b,c,d,e,f,g):this.db.get(a,"",c,d,e,f,g):(b?(h=this.ctx.get(i?a:b),h=h&&h.get(i?b:a)):h=this.map.get(a),h)};
\ No newline at end of file
+import{SearchOptions,SearchResults,EnrichedSearchResults}from"../type.js";import{create_object,is_object,sort_by_length_down}from"../common.js";import Index from"../index.js";import default_compress from"../compress.js";import Resolver from"../resolver.js";import{intersect}from"../intersect.js";import resolve_default from"../resolve/default.js";let global_resolve=1;export function set_resolve(a){global_resolve=a}Index.prototype.search=function(a,b,c){c||(!b&&is_object(a)?(c=a,a=""):is_object(b)&&(c=b,b=0));let d,e,f,g,h,i,j,k,l=[],m=0;c?(a=c.query||a,b=c.limit||b,m=c.offset||0,e=c.context,f=c.suggest,g=global_resolve&&!1!==c.resolve,g||(global_resolve=0),h=g&&c.enrich,j=c.boost,k=c.resolution,i=this.db&&c.tag):g=this.resolve||global_resolve;let n=this.encoder.encode(a);if(d=n.length,b||!g||(b=100),1===d)return single_term_query.call(this,n[0],"",b,m,g,h,i);if(e=this.depth&&!1!==e,2===d&&e&&!f)return single_term_query.call(this,n[0],n[1],b,m,g,h,i);let o=0,p=0;if(1<d){const b=create_object(),c=[];for(let a,e=0;e<d;e++)if(a=n[e],a&&!b[a]){if(!f&&!this.db&&!this.get_array(a))return g?l:new Resolver(l);c.push(a),b[a]=1;const d=a.length;o=Math.max(o,d),p=p?Math.min(p,d):d}n=c,d=a.length}if(!d)return g?l:new Resolver(l);let q,r=0;if(1===d)return single_term_query.call(this,n[0],"",b,m,g,h,i);if(2===d&&e&&!f)return single_term_query.call(this,n[0],n[1],b,m,g,h,i);if(1<d&&(e?(q=n[0],r=1):9<o&&3<o/p&&n.sort(sort_by_length_down)),k||0===k||(k=this.resolution),this.db){if(this.db.search){const a=this.db.search(this,n,b,m,f,g,h,i);if(!1!==a)return a}const a=this;return async function(){for(let c,e;r<d;r++){if(e=n[r],q?(c=await a.get_array(e,q,0,0,!1,!1),c=add_result(c,l,f,a.resolution_ctx),(!f||!1!==c||!l.length)&&(q=e)):(c=await a.get_array(e,"",0,0,!1,!1),c=add_result(c,l,f,k)),c)return c;if(f&&r==d-1){let a=l.length;if(!a){if(q){q="",r=-1;continue}return l}if(1===a)return g?resolve_default(l[0],b,m):new Resolver(l[0])}}return g?intersect(l,k,b,m,f,j,g):new Resolver(l[0])}()}for(let e,h;r<d;r++){if(h=n[r],q?(e=this.get_array(h,q,0,0,!1,!1),e=add_result(e,l,f,this.resolution_ctx),(!f||!1!==e||!l.length)&&(q=h)):(e=this.get_array(h,"",0,0,!1,!1),e=add_result(e,l,f,k)),e)return e;if(f&&r==d-1){const a=l.length;if(!a){if(q){q="",r=-1;continue}return l}if(1===a)return g?resolve_default(l[0],b,m):new Resolver(l[0])}}return l=intersect(l,k,b,m,f,j,g),g?l:new Resolver(l)};function single_term_query(a,b,c,d,e,f,g){const h=this.get_array(a,b,c,d,e,f,g);return this.db?h.then(function(a){return e?a:a&&a.length?e?resolve_default(a,c,d):new Resolver(a):e?[]:new Resolver([])}):h&&h.length?e?resolve_default(h,c,d):new Resolver(h):e?[]:new Resolver([])}function add_result(a,b,c,d){let e=[];if(a){d=Math.min(a.length,d);for(let b,c=0;c<d;c++)(b=a[c])&&b&&(e[c]=b);if(e.length)return void b.push(e)}return!c&&e}Index.prototype.get_array=function(a,b,c,d,e,f,g){let h,i;return(b&&(i=this.bidirectional&&a>b),this.compress&&(a=default_compress(a),b&&(b=default_compress(b))),this.db)?b?this.db.get(i?b:a,i?a:b,c,d,e,f,g):this.db.get(a,"",c,d,e,f,g):(b?(h=this.ctx.get(i?a:b),h=h&&h.get(i?b:a)):h=this.map.get(a),h)};
\ No newline at end of file
diff --git a/dist/module-min/type.js b/dist/module-min/type.js
index 944924f..35d83c8 100644
--- a/dist/module-min/type.js
+++ b/dist/module-min/type.js
@@ -1 +1 @@
-import Index from"./index.js";import Encoder from"./encoder.js";import StorageInterface from"./db/interface.js";export const IndexOptions={};export const DocumentIndexOptions={};export const DocumentOptions={};export const ContextOptions={};export const DocumentDescriptor={};export const TagOptions={};export const StoreOptions={};export const SearchOptions={};export const DocumentSearchOptions={};export const DocumentSearchResults={};export const EnrichedDocumentSearchResults={};export const MergedDocumentSearchResults={};export const EncoderOptions={};export const EncoderSplitOptions={};export const PersistentOptions={};export const ResolverOptions={};
\ No newline at end of file
+import Index from"./index.js";import Encoder from"./encoder.js";import StorageInterface from"./db/interface.js";export let IndexOptions={};export let FieldOptions={};export let DocumentOptions={};export let ContextOptions={};export let DocumentDescriptor={};export let TagOptions={};export let StoreOptions={};export let SearchOptions={};export let DocumentSearchOptions={};export let SearchResults={};export let EnrichedSearchResults={};export let DocumentSearchResults={};export let EnrichedDocumentSearchResults={};export let MergedDocumentSearchResults={};export let EncoderSplitOptions={};export let EncoderOptions={};export let PersistentOptions={};export let ResolverOptions={};
\ No newline at end of file
diff --git a/dist/module-min/webpack.js b/dist/module-min/webpack.js
deleted file mode 100644
index a2b7eba..0000000
--- a/dist/module-min/webpack.js
+++ /dev/null
@@ -1 +0,0 @@
-import{SearchOptions,ContextOptions,DocumentDescriptor,DocumentSearchOptions,DocumentIndexOptions,IndexOptions,DocumentOptions,TagOptions,StoreOptions,EncoderOptions,EncoderSplitOptions,PersistentOptions,ResolverOptions}from"./type.js";import StorageInterface from"./db/interface.js";import Document from"./document.js";import Index from"./index.js";import WorkerIndex from"./worker.js";import Resolver from"./resolver.js";import Encoder from"./encoder.js";import IdxDB from"./db/indexeddb/index.js";import Charset from"./charset.js";Index.prototype.add,Index.prototype.append,Index.prototype.search,Index.prototype.update,Index.prototype.remove,Index.prototype.contain,Index.prototype.clear,Index.prototype.cleanup,Index.prototype.searchCache,Index.prototype.addAsync,Index.prototype.appendAsync,Index.prototype.searchAsync,Index.prototype.updateAsync,Index.prototype.removeAsync,Index.prototype.export,Index.prototype.import,Index.prototype.serialize,Index.prototype.mount,Index.prototype.commit,Index.prototype.destroy,Index.prototype.reg,Index.prototype.map,Index.prototype.ctx,Index.prototype.db,Index.prototype.tag,Index.prototype.store,Index.prototype.depth,Index.prototype.bidirectional,Index.prototype.commit_task,Index.prototype.commit_timer,Index.prototype.cache,Index.prototype.bypass,Index.prototype.document,Index.prototype.encoder,Document.prototype.add,Document.prototype.append,Document.prototype.search,Document.prototype.update,Document.prototype.remove,Document.prototype.contain,Document.prototype.clear,Document.prototype.cleanup,Document.prototype.addAsync,Document.prototype.appendAsync,Document.prototype.searchAsync,Document.prototype.updateAsync,Document.prototype.removeAsync,Document.prototype.mount,Document.prototype.commit,Document.prototype.destroy,Document.prototype.export,Document.prototype.import,Document.prototype.searchCache,Document.prototype.get,Document.prototype.set,Resolver.prototype.limit,Resolver.prototype.offset,Resolver.prototype.boost,Resolver.prototype.resolve,Resolver.prototype.or,Resolver.prototype.and,Resolver.prototype.xor,Resolver.prototype.not,StorageInterface.db,StorageInterface.id,StorageInterface.support_tag_search,StorageInterface.prototype.mount,StorageInterface.prototype.open,StorageInterface.prototype.close,StorageInterface.prototype.destroy,StorageInterface.prototype.clear,StorageInterface.prototype.get,StorageInterface.prototype.tag,StorageInterface.prototype.enrich,StorageInterface.prototype.has,StorageInterface.prototype.search,StorageInterface.prototype.info,StorageInterface.prototype.commit,StorageInterface.prototype.remove,Charset.LatinExact,Charset.LatinDefault,Charset.LatinSimple,Charset.LatinBalance,Charset.LatinAdvanced,Charset.LatinExtra,Charset.LatinSoundex,Charset.ArabicDefault,Charset.CjkDefault,Charset.CyrillicDefault,IndexOptions.preset,IndexOptions.context,IndexOptions.encoder,IndexOptions.encode,IndexOptions.resolution,IndexOptions.tokenize,IndexOptions.fastupdate,IndexOptions.score,IndexOptions.keystore,IndexOptions.rtl,IndexOptions.cache,IndexOptions.resolve,IndexOptions.db,IndexOptions.config,DocumentIndexOptions.preset,DocumentIndexOptions.context,DocumentIndexOptions.encoder,DocumentIndexOptions.encode,DocumentIndexOptions.resolution,DocumentIndexOptions.tokenize,DocumentIndexOptions.fastupdate,DocumentIndexOptions.score,DocumentIndexOptions.keystore,DocumentIndexOptions.rtl,DocumentIndexOptions.cache,DocumentIndexOptions.db,DocumentIndexOptions.config,DocumentIndexOptions.field,DocumentIndexOptions.filter,DocumentIndexOptions.custom,DocumentOptions.context,DocumentOptions.encoder,DocumentOptions.encode,DocumentOptions.resolution,DocumentOptions.tokenize,DocumentOptions.fastupdate,DocumentOptions.score,DocumentOptions.keystore,DocumentOptions.rtl,DocumentOptions.cache,DocumentOptions.db,DocumentOptions.doc,DocumentOptions.document,DocumentOptions.worker,ContextOptions.depth,ContextOptions.bidirectional,ContextOptions.resolution,DocumentDescriptor.field,DocumentDescriptor.index,DocumentDescriptor.tag,DocumentDescriptor.store,TagOptions.field,TagOptions.tag,TagOptions.filter,TagOptions.custom,TagOptions.keystore,TagOptions.db,TagOptions.config,StoreOptions.field,StoreOptions.filter,StoreOptions.custom,StoreOptions.config,SearchOptions.query,SearchOptions.limit,SearchOptions.offset,SearchOptions.context,SearchOptions.suggest,SearchOptions.resolve,SearchOptions.enrich,DocumentSearchOptions.query,DocumentSearchOptions.limit,DocumentSearchOptions.offset,DocumentSearchOptions.context,DocumentSearchOptions.suggest,DocumentSearchOptions.enrich,DocumentSearchOptions.tag,DocumentSearchOptions.field,DocumentSearchOptions.index,DocumentSearchOptions.pluck,DocumentSearchOptions.merge,DocumentSearchOptions.highlight,EncoderOptions.rtl,EncoderOptions.dedupe,EncoderOptions.split,EncoderOptions.include,EncoderOptions.exclude,EncoderOptions.prepare,EncoderOptions.finalize,EncoderOptions.filter,EncoderOptions.matcher,EncoderOptions.mapper,EncoderOptions.stemmer,EncoderOptions.replacer,EncoderOptions.minlength,EncoderOptions.maxlength,EncoderOptions.cache,EncoderSplitOptions.letter,EncoderSplitOptions.number,EncoderSplitOptions.symbol,EncoderSplitOptions.punctuation,EncoderSplitOptions.control,EncoderSplitOptions.char,PersistentOptions.name,PersistentOptions.field,PersistentOptions.type,PersistentOptions.db,ResolverOptions.index,ResolverOptions.query,ResolverOptions.limit,ResolverOptions.offset,ResolverOptions.enrich,ResolverOptions.resolve,ResolverOptions.suggest;const FlexSearch={Index:Index,Charset:Charset,Encoder:Encoder,Document:Document,Worker:WorkerIndex,Resolver:Resolver,IndexedDB:IdxDB,Language:{}};{FlexSearch.Language={};const a=self;let b;(b=a.define)&&b.amd?b([],function(){return FlexSearch}):"object"==typeof a.exports?a.exports=FlexSearch:a.FlexSearch=FlexSearch}
\ No newline at end of file
diff --git a/dist/module-min/worker/handler.js b/dist/module-min/worker/handler.js
index 39e16bf..5527b3b 100644
--- a/dist/module-min/worker/handler.js
+++ b/dist/module-min/worker/handler.js
@@ -1 +1 @@
-import Index from"../index.js";import{IndexOptions}from"../type.js";export default(async function(a){a=a.data;const b=self._index,c=a.args,d=a.task;switch(d){case"init":let e=a.options||{},f=e.config;f&&(e=f);const g=a.factory;g?(Function("return "+g)()(self),self._index=new self.FlexSearch.Index(e),delete self.FlexSearch):self._index=new Index(e),postMessage({id:a.id});break;default:const h=a.id,i=b[d].apply(b,c);postMessage("search"===d?{id:h,msg:i}:{id:h});}});
\ No newline at end of file
+import Index from"../index.js";import{IndexOptions}from"../type.js";export default(async function(a){a=a.data;const b=self._index,c=a.args,d=a.task;switch(d){case"init":let e=a.options||{},f=e.config;f&&(e=e);const g=a.factory;g?(Function("return "+g)()(self),self._index=new self.FlexSearch.Index(e),delete self.FlexSearch):self._index=new Index(e),postMessage({id:a.id});break;default:const h=a.id,i=b[d].apply(b,c);postMessage("search"===d?{id:h,msg:i}:{id:h});}});
\ No newline at end of file
diff --git a/dist/module/webpack.js b/dist/module/bundle.js
similarity index 84%
rename from dist/module/webpack.js
rename to dist/module/bundle.js
index 444c329..d3507ce 100644
--- a/dist/module/webpack.js
+++ b/dist/module/bundle.js
@@ -1,5 +1,5 @@
 
-import { SearchOptions, ContextOptions, DocumentDescriptor, DocumentSearchOptions, DocumentIndexOptions, IndexOptions, DocumentOptions, TagOptions, StoreOptions, EncoderOptions, EncoderSplitOptions, PersistentOptions, ResolverOptions } from "./type.js";
+import { SearchOptions, ContextOptions, DocumentDescriptor, DocumentSearchOptions, FieldOptions, IndexOptions, DocumentOptions, TagOptions, StoreOptions, EncoderOptions, EncoderSplitOptions, PersistentOptions, ResolverOptions } from "./type.js";
 import StorageInterface from "./db/interface.js";
 import Document from "./document.js";
 import Index from "./index.js";
@@ -46,6 +46,14 @@ import Charset from "./charset.js";
 /** @export */Index.prototype.document;
 /** @export */Index.prototype.encoder;
 
+/** @export */Encoder.prototype.assign;
+/** @export */Encoder.prototype.encode;
+/** @export */Encoder.prototype.addMatcher;
+/** @export */Encoder.prototype.addStemmer;
+/** @export */Encoder.prototype.addFilter;
+/** @export */Encoder.prototype.addMapper;
+/** @export */Encoder.prototype.addReplacer;
+
 /** @export */Document.prototype.add;
 /** @export */Document.prototype.append;
 /** @export */Document.prototype.search;
@@ -76,6 +84,7 @@ import Charset from "./charset.js";
 /** @export */Resolver.prototype.and;
 /** @export */Resolver.prototype.xor;
 /** @export */Resolver.prototype.not;
+/** @export */Resolver.prototype.result;
 
 /** @export */StorageInterface.db;
 /** @export */StorageInterface.id;
@@ -118,25 +127,27 @@ import Charset from "./charset.js";
 /** @export */IndexOptions.cache;
 /** @export */IndexOptions.resolve;
 /** @export */IndexOptions.db;
-/** @export */IndexOptions.config;
+/** @export */IndexOptions.worker; // worker url
+/** @export */IndexOptions.config; // config url
 
-/** @export */DocumentIndexOptions.preset;
-/** @export */DocumentIndexOptions.context;
-/** @export */DocumentIndexOptions.encoder;
-/** @export */DocumentIndexOptions.encode;
-/** @export */DocumentIndexOptions.resolution;
-/** @export */DocumentIndexOptions.tokenize;
-/** @export */DocumentIndexOptions.fastupdate;
-/** @export */DocumentIndexOptions.score;
-/** @export */DocumentIndexOptions.keystore;
-/** @export */DocumentIndexOptions.rtl;
-/** @export */DocumentIndexOptions.cache;
-/** @export */DocumentIndexOptions.db;
-/** @export */DocumentIndexOptions.config;
-// /** @export */ DocumentIndexOptions.resolve;
-/** @export */DocumentIndexOptions.field;
-/** @export */DocumentIndexOptions.filter;
-/** @export */DocumentIndexOptions.custom;
+/** @export */FieldOptions.preset;
+/** @export */FieldOptions.context;
+/** @export */FieldOptions.encoder;
+/** @export */FieldOptions.encode;
+/** @export */FieldOptions.resolution;
+/** @export */FieldOptions.tokenize;
+/** @export */FieldOptions.fastupdate;
+/** @export */FieldOptions.score;
+/** @export */FieldOptions.keystore;
+/** @export */FieldOptions.rtl;
+/** @export */FieldOptions.cache;
+/** @export */FieldOptions.db;
+/** @export */FieldOptions.config;
+/** @export */FieldOptions.resolve;
+/** @export */FieldOptions.field;
+/** @export */FieldOptions.filter;
+/** @export */FieldOptions.custom;
+/** @export */FieldOptions.worker;
 
 /** @export */DocumentOptions.context;
 /** @export */DocumentOptions.encoder;
@@ -182,6 +193,7 @@ import Charset from "./charset.js";
 /** @export */SearchOptions.suggest;
 /** @export */SearchOptions.resolve;
 /** @export */SearchOptions.enrich;
+/** @export */SearchOptions.resolution;
 
 /** @export */DocumentSearchOptions.query;
 /** @export */DocumentSearchOptions.limit;
@@ -231,6 +243,10 @@ import Charset from "./charset.js";
 /** @export */ResolverOptions.enrich;
 /** @export */ResolverOptions.resolve;
 /** @export */ResolverOptions.suggest;
+/** @export */ResolverOptions.and;
+/** @export */ResolverOptions.or;
+/** @export */ResolverOptions.xor;
+/** @export */ResolverOptions.not;
 
 const FlexSearch = {
     Index: Index,
@@ -268,4 +284,8 @@ const FlexSearch = {
                 /** @export */
                 root.FlexSearch = FlexSearch;
             }
-}
\ No newline at end of file
+}
+
+
+export default FlexSearch;
+export { Index, Document, Encoder, Charset, WorkerIndex as Worker, Resolver, IdxDB as IndexedDB };
\ No newline at end of file
diff --git a/dist/module/cache.js b/dist/module/cache.js
index 9846d7a..07aeeb0 100644
--- a/dist/module/cache.js
+++ b/dist/module/cache.js
@@ -1,10 +1,11 @@
 import Index from "./index.js";
 import Document from "./document.js";
+import { SearchOptions, DocumentSearchOptions } from "./type.js";
 
 /**
- * @param {string|Object} query
- * @param {number|Object=} limit
- * @param {Object=} options
+ * @param {string|SearchOptions|DocumentSearchOptions} query
+ * @param {number|SearchOptions|DocumentSearchOptions=} limit
+ * @param {SearchOptions|DocumentSearchOptions=} options
  * @this {Index|Document}
  * @returns {Array<number|string>|Promise}
  */
diff --git a/dist/module/charset/latin/soundex.js b/dist/module/charset/latin/soundex.js
index 9766d70..c1ef7a2 100644
--- a/dist/module/charset/latin/soundex.js
+++ b/dist/module/charset/latin/soundex.js
@@ -1,6 +1,6 @@
 import { EncoderOptions } from "../../type.js";
 
-/** @type EncoderOptions */
+/** @type {EncoderOptions} */
 const options = {
     normalize: !0,
     dedupe: !1,
diff --git a/dist/module/db/indexeddb/index.js b/dist/module/db/indexeddb/index.js
index 14b83e8..42e8cf8 100644
--- a/dist/module/db/indexeddb/index.js
+++ b/dist/module/db/indexeddb/index.js
@@ -27,7 +27,7 @@ export default function IdxDB(name, config = {}) {
     }
     if ("object" == typeof name) {
         name = name.name;
-        config = name;
+        config = /** @type PersistentOptions */name;
     }
     if (!name) {
         console.info("Default storage space was used, because a name was not passed.");
diff --git a/dist/module/document.js b/dist/module/document.js
index 6e0b697..52289ed 100644
--- a/dist/module/document.js
+++ b/dist/module/document.js
@@ -6,7 +6,7 @@
  * https://github.com/nextapps-de/flexsearch
  */
 
-import { DocumentOptions, DocumentDescriptor, DocumentIndexOptions, StoreOptions } from "./type.js";
+import { IndexOptions, DocumentOptions, DocumentDescriptor, FieldOptions, StoreOptions } from "./type.js";
 import Index from "./index.js";
 import WorkerIndex from "./worker.js";
 import Cache, { searchCache } from "./cache.js";
@@ -29,8 +29,7 @@ export default function Document(options) {
         return new Document(options);
     }
 
-    /** @type DocumentDescriptor */
-    const document = options.document || options.doc || options;
+    const document = /** @type DocumentDescriptor */options.document || options.doc || options;
     let tmp, keystore;
 
     this.tree = [];
@@ -44,13 +43,14 @@ export default function Document(options) {
     this.reg = this.fastupdate ? keystore && /* tag? */ /* stringify */ /* stringify */ /* single param */ /* skip update: */ /* append: */ /* skip update: */ /* skip_update: */ /* skip deletion */!0 /*await rows.hasNext()*/ /*await rows.hasNext()*/ /*await rows.hasNext()*/ ? new KeystoreMap(keystore) : new Map() : keystore && !0 ? new KeystoreSet(keystore) : new Set();
 
     // todo support custom filter function
-    this.storetree = (tmp = document.store || null) && !0 !== tmp && [];
+    this.storetree = (tmp = document.store || null) && tmp && !0 !== tmp && [];
     this.store = tmp && (keystore && !0 ? new KeystoreMap(keystore) : new Map());
 
     this.cache = (tmp = options.cache || null) && new Cache(tmp);
     // do not apply cache again for the indexes since .searchCache()
     // is just a wrapper over .search()
-    options.cache = /* suggest */ /* append: */ /* enrich */!1;
+    options.cache =
+    /* suggest */ /* append: */ /* enrich */!1;
 
     this.worker = options.worker;
 
@@ -93,7 +93,6 @@ export default function Document(options) {
                         this.tagtree[i]._filter = params.filter;
                     }
                 }
-                // the tag fields needs to be hold by indices
                 this.tagfield[i] = field;
                 this.tag.set(field, new Map());
             }
@@ -136,7 +135,7 @@ Document.prototype.mount = function (db) {
             let index; // = this.index.get(field);
             //if(!index){
             // create raw index when not exists
-            this.index.set(field, index = new Index({}, this.reg));
+            this.index.set(field, index = new Index( /** @type IndexOptions */{}, this.reg));
             // copy and push to the field selection
             if (fields === this.field) {
                 fields = fields.slice(0);
@@ -227,7 +226,7 @@ function parse_descriptor(options, document) {
             key = key.field;
         }
 
-        opt = /** @type DocumentIndexOptions */is_object(opt) ? Object.assign({}, options, opt) : options;
+        opt = /** @type IndexOptions */is_object(opt) ? Object.assign({}, options, opt) : options;
 
         if (this.worker) {
             const worker = new WorkerIndex(opt);
@@ -242,7 +241,7 @@ function parse_descriptor(options, document) {
         }
 
         if (!this.worker) {
-            index.set(key, new Index(opt, this.reg));
+            index.set(key, new Index( /** @type IndexOptions */opt, this.reg));
         }
 
         if (opt.custom) {
diff --git a/dist/module/document/search.js b/dist/module/document/search.js
index 01c3dcf..607e483 100644
--- a/dist/module/document/search.js
+++ b/dist/module/document/search.js
@@ -1,6 +1,5 @@
 
-
-import { DocumentSearchOptions } from "../type.js";
+import { DocumentSearchOptions, DocumentSearchResults, EnrichedDocumentSearchResults, MergedDocumentSearchResults } from "../type.js";
 import { create_object, is_array, is_object, is_string, parse_simple } from "../common.js";
 import { intersect_union } from "../intersect.js";
 import Document from "../document.js";
@@ -12,7 +11,7 @@ let debug = /* suggest */ /* append: */ /* enrich */!1;
  * @param {number|DocumentSearchOptions=} limit
  * @param {DocumentSearchOptions=} options
  * @param {Array<Array>=} _promises For internal use only.
- * @returns {Promise|Array}
+ * @returns {DocumentSearchResults|EnrichedDocumentSearchResults|MergedDocumentSearchResults|Promise<DocumentSearchResults|EnrichedDocumentSearchResults|MergedDocumentSearchResults>}
  */
 
 Document.prototype.search = function (query, limit, options, _promises) {
@@ -43,7 +42,7 @@ Document.prototype.search = function (query, limit, options, _promises) {
     if (options) {
 
         if (is_array(options)) {
-            options = {
+            options = /** @type DocumentSearchOptions */{
                 index: options
             };
         }
@@ -351,9 +350,7 @@ Document.prototype.search = function (query, limit, options, _promises) {
         };
     }
 
-    if (enrich && /* tag? */ /* stringify */ /* stringify */ /* single param */ /* skip update: */ /* append: */ /* skip update: */ /* skip_update: */!0 /*await rows.hasNext()*/ /*await rows.hasNext()*/
-    /*await rows.hasNext()*/
-    && this.db && promises.length) {
+    if (enrich && /* tag? */ /* stringify */ /* stringify */ /* single param */ /* skip update: */ /* append: */ /* skip update: */ /* skip_update: */!0 /*await rows.hasNext()*/ /*await rows.hasNext()*/ /*await rows.hasNext()*/ && this.db && promises.length) {
         const self = this;
         return Promise.all(promises).then(function (promises) {
             for (let j = 0; j < promises.length; j++) {
@@ -378,6 +375,8 @@ function highlight_fields(result, query, index, field, tree, template) {
 
     // if(typeof template === "string"){
     //     template = new RegExp(template, "g");
+    // }
+
     let encoder, query_enc, tokenize;
 
 
diff --git a/dist/module/index.js b/dist/module/index.js
index 344fbd5..6188394 100644
--- a/dist/module/index.js
+++ b/dist/module/index.js
@@ -6,7 +6,7 @@
  * https://github.com/nextapps-de/flexsearch
  */
 
-import { IndexOptions, ContextOptions } from "./type.js";
+import { IndexOptions, ContextOptions, EncoderOptions } from "./type.js";
 import Encoder from "./encoder.js";
 import Cache, { searchCache } from "./cache.js";
 import Charset from "./charset.js";
@@ -33,19 +33,19 @@ export default function Index(options, _register) {
         return new Index(options);
     }
 
-    options = options ? apply_preset(options) : {};
+    options = /** @type IndexOptions */options ? apply_preset(options) : {};
 
+    let tmp = options.context;
     /** @type ContextOptions */
-    const context = options.context || {},
+    const context = /* tag? */ /* stringify */ /* stringify */ /* single param */ /* skip update: */ /* append: */ /* skip update: */ /* skip_update: */ /* skip deletion */!0 /*await rows.hasNext()*/ /*await rows.hasNext()*/ /*await rows.hasNext()*/ === tmp ? { depth: 1 } : tmp || {},
           encoder = is_string(options.encoder) ? Charset[options.encoder] : options.encode || options.encoder || default_encoder;
 
     /** @type Encoder */
-    this.encoder = encoder.encode ? encoder : "object" == typeof encoder ? new Encoder(encoder) : { encode: encoder };
+    this.encoder = encoder.encode ? encoder : "object" == typeof encoder ? new Encoder( /** @type {EncoderOptions} */encoder) : { encode: encoder };
 
     this.compress = options.compress || options.compression || /* suggest */ /* append: */ /* enrich */!1;
 
 
-    let tmp;
     this.resolution = options.resolution || 9;
     this.tokenize = tmp = options.tokenize || "strict";
     this.depth = "strict" === tmp && context.depth || 0;
@@ -56,10 +56,10 @@ export default function Index(options, _register) {
     tmp = options.keystore || 0;
     tmp && (this.keystore = tmp);
 
-    this.map = tmp && /* tag? */ /* stringify */ /* stringify */ /* single param */ /* skip update: */ /* append: */ /* skip update: */ /* skip_update: */ /* skip deletion */!0 /*await rows.hasNext()*/ /*await rows.hasNext()*/ /*await rows.hasNext()*/ ? new KeystoreMap(tmp) : new Map();
+    this.map = tmp && !0 ? new KeystoreMap(tmp) : new Map();
     this.ctx = tmp && !0 ? new KeystoreMap(tmp) : new Map();
     this.reg = _register || (this.fastupdate ? tmp && !0 ? new KeystoreMap(tmp) : new Map() : tmp && !0 ? new KeystoreSet(tmp) : new Set());
-    this.resolution_ctx = context.resolution || 1;
+    this.resolution_ctx = context.resolution || 3;
     this.rtl = encoder.rtl || options.rtl || !1;
 
     this.cache = (tmp = options.cache || null) && new Cache(tmp);
diff --git a/dist/module/index/search.js b/dist/module/index/search.js
index 0eca95b..e459b19 100644
--- a/dist/module/index/search.js
+++ b/dist/module/index/search.js
@@ -1,6 +1,6 @@
 
 
-import { SearchOptions } from "../type.js";
+import { SearchOptions, SearchResults, EnrichedSearchResults } from "../type.js";
 import { create_object, is_object, sort_by_length_down } from "../common.js";
 import Index from "../index.js";
 import default_compress from "../compress.js";
@@ -17,7 +17,7 @@ export function set_resolve(resolve) {
  * @param {string|SearchOptions} query
  * @param {number|SearchOptions=} limit
  * @param {SearchOptions=} options
- * @returns {Array|Resolver|Promise<Array|Resolver>}
+ * @returns {SearchResults|EnrichedSearchResults|Resolver|Promise<SearchResults|EnrichedSearchResults|Resolver>}
  */
 
 Index.prototype.search = function (query, limit, options) {
@@ -40,7 +40,8 @@ Index.prototype.search = function (query, limit, options) {
         resolve,
         enrich,
         tag,
-        boost;
+        boost,
+        resolution;
 
 
     if (options) {
@@ -53,6 +54,7 @@ Index.prototype.search = function (query, limit, options) {
         resolve || (global_resolve = 0);
         enrich = resolve && options.enrich;
         boost = options.boost;
+        resolution = options.resolution;
         tag = this.db && options.tag;
     } else {
         resolve = this.resolve || global_resolve;
@@ -62,13 +64,14 @@ Index.prototype.search = function (query, limit, options) {
 
     // do not force a string as input
     // https://github.com/nextapps-de/flexsearch/issues/432
-    query = /** @type {Array<string>} */this.encoder.encode(query);
-    length = query.length;
+    /** @type {Array<string>} */
+    let query_terms = this.encoder.encode(query);
+    length = query_terms.length;
     limit || !resolve || (limit = 100);
 
     // fast path single term
     if (1 === length) {
-        return single_term_query.call(this, query[0], // term
+        return single_term_query.call(this, query_terms[0], // term
         "", // ctx
         limit, offset, resolve, enrich, tag);
     }
@@ -80,8 +83,8 @@ Index.prototype.search = function (query, limit, options) {
 
     // fast path single context
     if (2 === length && context && !suggest) {
-        return single_term_query.call(this, query[0], // term
-        query[1], // ctx
+        return single_term_query.call(this, query_terms[0], // term
+        query_terms[1], // ctx
         limit, offset, resolve, enrich, tag);
     }
 
@@ -98,7 +101,7 @@ Index.prototype.search = function (query, limit, options) {
 
 
         // if(context){
-        //     keyword = query[0];
+        //     keyword = query_terms[0];
         //     dupes[keyword] = 1;
         //     query_new.push(keyword);
         //     maxlength = minlength = keyword.length;
@@ -107,7 +110,7 @@ Index.prototype.search = function (query, limit, options) {
 
         for (let i = 0, term; i < length; i++) {
 
-            term = query[i];
+            term = query_terms[i];
 
             if (term && !dupes[term]) {
 
@@ -132,7 +135,7 @@ Index.prototype.search = function (query, limit, options) {
             // }
         }
 
-        query = query_new;
+        query_terms = query_new;
         length = query.length;
     }
 
@@ -147,22 +150,22 @@ Index.prototype.search = function (query, limit, options) {
 
     // fast path single term
     if (1 === length) {
-        return single_term_query.call(this, query[0], // term
+        return single_term_query.call(this, query_terms[0], // term
         "", // ctx
         limit, offset, resolve, enrich, tag);
     }
 
     // fast path single context
     if (2 === length && context && !suggest) {
-        return single_term_query.call(this, query[0], // term
-        query[1], // ctx
+        return single_term_query.call(this, query_terms[0], // term
+        query_terms[1], // ctx
         limit, offset, resolve, enrich, tag);
     }
 
     if (1 < length) {
         if (context) {
             // start with context right away
-            keyword = query[0];
+            keyword = query_terms[0];
             index = 1;
         }
         // todo
@@ -171,17 +174,21 @@ Index.prototype.search = function (query, limit, options) {
                 // bigger terms has less occurrence
                 // this might also reduce the intersection task
                 // todo check intersection order
-                query.sort(sort_by_length_down);
+                query_terms.sort(sort_by_length_down);
             }
     }
 
+    if (!resolution && 0 !== resolution) {
+        resolution = this.resolution;
+    }
+
     // from this point there are just multi-term queries
 
     if (this.db) {
 
         if (this.db.search) {
             // when the configuration is not supported it returns false
-            const result = this.db.search(this, query, limit, offset, suggest, resolve, enrich, tag);
+            const result = this.db.search(this, query_terms, limit, offset, suggest, resolve, enrich, tag);
             if (!1 !== result) return result;
         }
 
@@ -190,7 +197,7 @@ Index.prototype.search = function (query, limit, options) {
 
             for (let arr, term; index < length; index++) {
 
-                term = query[index];
+                term = query_terms[index];
 
                 if (keyword) {
 
@@ -211,7 +218,7 @@ Index.prototype.search = function (query, limit, options) {
                 } else {
 
                     arr = await self.get_array(term, "", 0, 0, !1, !1);
-                    arr = add_result(arr, result, suggest, self.resolution
+                    arr = add_result(arr, result, suggest, resolution
                     // 0, // /** @type {!number} */ (limit),
                     // 0, // offset,
                     // length === 1
@@ -241,13 +248,13 @@ Index.prototype.search = function (query, limit, options) {
                 }
             }
 
-            return resolve ? intersect(result, self.resolution, /** @type {number} */limit, offset, suggest, boost, resolve) : new Resolver(result[0]);
+            return resolve ? intersect(result, resolution, /** @type {number} */limit, offset, suggest, boost, resolve) : new Resolver(result[0]);
         }();
     }
 
     for (let arr, term; index < length; index++) {
 
-        term = query[index];
+        term = query_terms[index];
 
         if (keyword) {
 
@@ -267,7 +274,7 @@ Index.prototype.search = function (query, limit, options) {
         } else {
 
             arr = this.get_array(term, "", 0, 0, !1, !1);
-            arr = /*this.*/add_result(arr, result, suggest, this.resolution
+            arr = /*this.*/add_result(arr, result, suggest, resolution
             // 0, // /** @type {!number} */ (limit),
             // 0, // offset,
             // length === 1
@@ -293,12 +300,12 @@ Index.prototype.search = function (query, limit, options) {
                 }
                 return result;
             } else if (1 === length) {
-                return resolve ? resolve_default(result[0], limit, offset) : new Resolver(result[0]);
+                return resolve ? resolve_default(result[0], /** @type {number} */limit, offset) : new Resolver(result[0]);
             }
         }
     }
 
-    result = intersect(result, this.resolution, limit, offset, suggest, boost, resolve);
+    result = intersect(result, resolution, limit, offset, suggest, boost, resolve);
 
     return resolve ? result : new Resolver(result);
 };
@@ -337,8 +344,8 @@ function single_term_query(term, keyword, limit, offset, resolve, enrich, tag) {
  * @private
  * @param {Array} arr
  * @param {Array} result
- * @param {Array} suggest
- * @param {number} resolution
+ * @param {boolean|null=} suggest
+ * @param {number=} resolution
  * @return {Array|boolean|undefined}
  */
 
diff --git a/dist/module/lang/de.js b/dist/module/lang/de.js
index 55eb8ef..6559526 100644
--- a/dist/module/lang/de.js
+++ b/dist/module/lang/de.js
@@ -14,7 +14,7 @@ export const filter = new Set(["aber", "als", "am", "an", "auch", "auf", "aus",
  * Example: The word "correct" and "correctness" could be the same word, so you can define {"ness": ""} to normalize the ending.
  * Object Definition: the key represents the word ending, the value contains the replacement (or empty string for removal).
  * http://snowball.tartarus.org/algorithms/german/stemmer.html
- * @type {Map<string>}
+ * @type {Map<string, string>}
  */
 
 export const stemmer = new Map([["niss", ""], ["isch", ""], ["lich", ""], ["heit", ""], ["keit", ""], ["ell", ""], ["bar", ""], ["end", ""], ["ung", ""], ["est", ""], ["ern", ""], ["em", ""], ["er", ""], ["en", ""], ["es", ""], ["st", ""], ["ig", ""], ["ik", ""], ["e", ""], ["s", ""]]);
@@ -22,7 +22,7 @@ export const stemmer = new Map([["niss", ""], ["isch", ""], ["lich", ""], ["heit
 /**
  * Matcher replaces all occurrences of a given string regardless of its position and is also a kind of "partial normalization".
  * Object Definition: the key represents the target term, the value contains the search string which should be replaced (could also be an array of multiple terms).
- * @type {Map<string>}
+ * @type {Map<string, string>}
  */
 const map = new Map([["_", " "], ["ä", "ae"], ["ö", "oe"], ["ü", "ue"], ["ß", "ss"], ["&", " und "], ["€", " EUR "]]),
       options = {
diff --git a/dist/module/lang/fr.js b/dist/module/lang/fr.js
index 51050f7..023f2f2 100644
--- a/dist/module/lang/fr.js
+++ b/dist/module/lang/fr.js
@@ -9,7 +9,7 @@ import { EncoderOptions } from "../type.js";
 export const filter = new Set(["au", "aux", "avec", "ce", "ces", "dans", "de", "des", "du", "elle", "en", "et", "eux", "il", "je", "la", "le", "leur", "lui", "ma", "mais", "me", "meme", "mes", "moi", "mon", "ne", "nos", "notre", "nous", "on", "ou", "par", "pas", "pour", "qu", "que", "qui", "sa", "se", "ses", "son", "sur", "ta", "te", "tes", "toi", "ton", "tu", "un", "une", "vos", "votre", "vous", "c", "d", "j", "l", "m", "n", "s", "t", "a", "y", "ete", "etee", "etees", "etes", "etant", "suis", "es", "est", "sommes", "etes", "sont", "serai", "seras", "sera", "serons", "serez", "seront", "serais", "serait", "serions", "seriez", "seraient", "etais", "etait", "etions", "etiez", "etaient", "fus", "fut", "fumes", "futes", "furent", "sois", "soit", "soyons", "soyez", "soient", "fusse", "fusses", "fut", "fussions", "fussiez", "fussent", "ayant", "eu", "eue", "eues", "eus", "ai", "as", "avons", "avez", "ont", "aurai", "auras", "aura", "aurons", "aurez", "auront", "aurais", "aurait", "aurions", "auriez", "auraient", "avais", "avait", "avions", "aviez", "avaient", "eut", "eumes", "eutes", "eurent", "aie", "aies", "ait", "ayons", "ayez", "aient", "eusse", "eusses", "eut", "eussions", "eussiez", "eussent", "ceci", "cela", "cela", "cet", "cette", "ici", "ils", "les", "leurs", "quel", "quels", "quelle", "quelles", "sans", "soi"]);
 
 /**
- * @type {Object<string, string>}
+ * @type {Map<string, string>}
  */
 
 export const stemmer = new Map([["lement", ""], ["ient", ""], ["nera", ""], ["ment", ""], ["ais", ""], ["ait", ""], ["ant", ""], ["ent", ""], ["iez", ""], ["ion", ""], ["nez", ""], ["ai", ""], ["es", ""], ["er", ""], ["ez", ""], ["le", ""], ["na", ""], ["ne", ""], ["a", ""], ["e", ""]]);
diff --git a/dist/module/preset.js b/dist/module/preset.js
index dfbaf3b..ebb4208 100644
--- a/dist/module/preset.js
+++ b/dist/module/preset.js
@@ -3,7 +3,7 @@ import { is_string } from "./common.js";
 import { IndexOptions } from "./type.js";
 
 /**
- * @enum {Object}
+ * @type {Object<string, IndexOptions>}
  * @const
  */
 
@@ -38,17 +38,18 @@ const presets = {
 
 /**
  *
- * @param {!IndexOptions|string} options
+ * @param {IndexOptions|string} options
  * @return {IndexOptions}
  */
 
 export default function apply_preset(options) {
 
-    const preset = is_string(options) ? options : options.preset;
+    const preset = /** @type string */is_string(options) ? options : options.preset;
 
     if (preset) {
-        options = Object.assign({}, presets[preset], /** @type {Object} */options);
+        options = /** @type IndexOptions */Object.assign({}, presets[preset], /** @type {Object} */options);
     }
 
-    return options;
+    return (/** @type IndexOptions */options
+    );
 }
\ No newline at end of file
diff --git a/dist/module/type.js b/dist/module/type.js
index c9d87a9..e588373 100644
--- a/dist/module/type.js
+++ b/dist/module/type.js
@@ -5,230 +5,243 @@ import Encoder from "./encoder.js";
 import StorageInterface from "./db/interface.js";
 
 /**
- * @typedef IndexOptions {{
- *   preset: string|undefined,
+ * @typedef {{
+ *   preset: (string|undefined),
  *   context: (IndexOptions|undefined),
- *   encoder: Encoder|Function|Object|undefined,
- *   encode: Function|undefined,
- *   resolution: [number=9],
- *   tokenize: [string="strict"],
- *   fastupdate: [boolean:false],
- *   score: Function]|undefined,
- *   keystore: [number=0],
- *   rtl: [boolean=false],
- *   cache: [number=null],
- *   resolve: [boolean=true],
- *   db: StorageInterface|undefined,
- *   commit: boolean=true,
- *   worker: boolean|string|undefined,
- *   config: string|undefined
+ *   encoder: (Encoder|Function|Object|undefined),
+ *   encode: (Function|undefined),
+ *   resolution: (number|undefined),
+ *   tokenize: (string|undefined),
+ *   fastupdate: (boolean|undefined),
+ *   score: (function():number|undefined),
+ *   keystore: (number|undefined),
+ *   rtl: (boolean|undefined),
+ *   cache: (number|boolean|undefined),
+ *   resolve: (boolean|undefined),
+ *   db: (StorageInterface|undefined),
+ *   commit: (boolean|undefined),
+ *   worker: (string|undefined),
+ *   config: (string|undefined)
  * }}
  */
-export const IndexOptions = {};
+export let IndexOptions = {};
 
 /**
- * @typedef DocumentIndexOptions {{
- *   preset: string|undefined,
+ * @typedef {{
+ *   preset: (string|undefined),
  *   context: (IndexOptions|undefined),
- *   encoder: Encoder|Function|Object|undefined,
- *   encode: Function|undefined,
- *   resolution: [number=9],
- *   tokenize: [string="strict"],
- *   fastupdate: [boolean:false],
- *   score: Function]|undefined,
- *   keystore: [number=0],
- *   rtl: [boolean=false],
- *   cache: [number=null],
- *   db: StorageInterface|undefined,
- *   commit: boolean=true,
- *   config: string|undefined,
- *   field: string,
- *   filter: Function|undefined,
- *   custom: Function|undefined
+ *   encoder: (Encoder|Function|Object|undefined),
+ *   encode: (Function|undefined),
+ *   resolution: (number|undefined),
+ *   tokenize: (string|undefined),
+ *   fastupdate: (boolean|undefined),
+ *   score: (Function|undefined),
+ *   keystore: (number|undefined),
+ *   rtl: (boolean|undefined),
+ *   cache: (number|undefined),
+ *   db: (StorageInterface|undefined),
+ *   commit: (boolean|undefined),
+ *   config: (string|undefined),
+ *   field: (string|undefined),
+ *   filter: (Function|undefined),
+ *   custom: (Function|undefined)
  * }}
  */
-export const DocumentIndexOptions = {};
+export let FieldOptions = {};
 
 /**
- * @typedef DocumentOptions {{
+ * @typedef {{
  *   context: (IndexOptions|undefined),
- *   encoder: Encoder|Function|Object|undefined,
- *   encode: Function|undefined,
- *   resolution: [number=9],
- *   tokenize: [string="strict"],
- *   fastupdate: [boolean:false],
- *   score: Function]|undefined,
- *   keystore: [number=0],
- *   rtl: [boolean=false],
- *   cache: [number=null],
- *   db: StorageInterface|undefined,
- *   doc: DocumentDescriptor|Array<DocumentDescriptor>|undefined,
- *   document: DocumentDescriptor|Array<DocumentDescriptor>|undefined,
- *   worker: boolean|string|undefined
+ *   encoder: (Encoder|Function|Object|undefined),
+ *   encode: (Function|undefined),
+ *   resolution: (number|undefined),
+ *   tokenize: (string|undefined),
+ *   fastupdate: (boolean|undefined),
+ *   score: (Function|undefined),
+ *   keystore: (number|undefined),
+ *   rtl: (boolean|undefined),
+ *   cache: (number|boolean|undefined),
+ *   db: (StorageInterface|undefined),
+ *   doc: (DocumentDescriptor|Array<DocumentDescriptor>|undefined),
+ *   document: (DocumentDescriptor|Array<DocumentDescriptor>|undefined),
+ *   worker: (boolean|string|undefined),
  * }}
  */
-export const DocumentOptions = {};
+export let DocumentOptions = {};
 
 /**
- * @typedef ContextOptions {{
- *   depth: number,
- *   bidirectional: boolean|undefined,
- *   resolution: number|undefined
+ * @typedef {{
+ *   depth: (number|undefined),
+ *   bidirectional: (boolean|undefined),
+ *   resolution: (number|undefined),
  * }}
  */
-export const ContextOptions = {};
+export let ContextOptions = {};
 
 /**
- * @typedef DocumentDescriptor {{
- *   id: string="id",
- *   field: FieldOptions|Array<FieldOptions>|undefined,
- *   index: FieldOptions|Array<FieldOptions>|undefined,
- *   tag: TagOptions|Array<TagOptions>|undefined,
- *   store: StoreOptions|Array<StoreOptions>|undefined
+ * @typedef {{
+ *   id: (string|undefined),
+ *   field: (string|Array<string>|FieldOptions|Array<FieldOptions>|undefined),
+ *   index: (string|Array<string>|FieldOptions|Array<FieldOptions>|undefined),
+ *   tag: (string|Array<string>|TagOptions|Array<TagOptions>|undefined),
+ *   store: (string|Array<string>|StoreOptions|Array<StoreOptions>|boolean|undefined),
  * }}
  */
-export const DocumentDescriptor = {};
+export let DocumentDescriptor = {};
 
 /**
- * @typedef TagOptions {{
+ * @typedef {{
  *   field: string,
- *   tag: Object<string, string|Array<string>>|Array<string>|string,
- *   filter: Function|undefined,
- *   custom: Function|undefined,
- *   keystore: [number=0],
- *   db: StorageInterface|undefined,
- *   config: string|undefined
+ *   filter: ((function(string):boolean)|undefined),
+ *   custom: ((function(string):string)|undefined),
+ *   db: (StorageInterface|undefined),
  * }}
  */
-export const TagOptions = {};
+export let TagOptions = {};
 
 /**
- * @typedef StoreOptions {{
+ * @typedef {{
  *   field: string,
- *   filter: Function|undefined,
- *   custom: Function|undefined,
- *   config: string|undefined
+ *   filter: ((function(string):boolean)|undefined),
+ *   custom: ((function(string):string)|undefined)
  * }}
  */
-export const StoreOptions = {};
+export let StoreOptions = {};
 
 /**
- * @typedef SearchOptions {{
- *   query: string=,
- *   limit: [number=100],
- *   offset: [number=0],
- *   context: boolean|undefined,
- *   suggest: [boolean=false],
- *   resolve: [boolean=true],
- *   enrich: [boolean=false]
+ * @typedef {{
+ *   query: (string|undefined),
+ *   limit: (number|undefined),
+ *   offset: (number|undefined),
+ *   resolution: (number|undefined),
+ *   context: (boolean|undefined),
+ *   suggest: (boolean|undefined),
+ *   resolve: (boolean|undefined),
+ *   enrich: (boolean|undefined),
  * }}
  */
-export const SearchOptions = {};
-// tag: Array|undefined
+export let SearchOptions = {};
 
 /**
- * @typedef DocumentSearchOptions {{
- *   query: string=,
- *   limit: [number=100],
- *   offset: [number=0],
- *   context: boolean|undefined,
- *   suggest: [boolean=false],
- *   enrich: [boolean=false],
- *   tag: Object|Array<Object>|undefined,
- *   field: Array<DocumentSearchOptions>|undefined,
- *   index: Array<DocumentSearchOptions>|undefined,
- *   pluck: boolean|undefined,
- *   merge: [boolean=false],
- *   highlight: string|undefined
+ * @typedef {{
+ *   query: (string|undefined),
+ *   limit: (number|undefined),
+ *   offset: (number|undefined),
+ *   context: (boolean|undefined),
+ *   suggest: (boolean|undefined),
+ *   enrich: (boolean|undefined),
+ *   tag: (Object|Array<Object>|undefined),
+ *   field: (Array<string>|Array<DocumentSearchOptions>|string|undefined),
+ *   index: (Array<string>|Array<DocumentSearchOptions>|undefined),
+ *   pluck: (string|undefined),
+ *   merge: (boolean|undefined),
+ *   highlight: (string|undefined),
  * }}
  */
-export const DocumentSearchOptions = {};
+export let DocumentSearchOptions = {};
 
 /**
- * @typedef DocumentSearchResults Array<{{
- *   field: string|undefined,
- *   tag: string|undefined,
- *   result: Array<number|string>,
- *   highlight: string|undefined
- * }}>
+ * @typedef Array<number|string>
  */
-export const DocumentSearchResults = {};
+export let SearchResults = {};
 
 /**
- * @typedef EnrichedDocumentSearchResults Array<{{
- *   field: string|undefined,
- *   tag: string|undefined,
- *   result: Array<{{
- *      id: number|string,
- *      doc: Object
- *   }}>,
- *   highlight: string|undefined
- * }}>
+ * @typedef Array<{
+ *   id: (number|string),
+ *   res: number
+ * }>
  */
-export const EnrichedDocumentSearchResults = {};
+export let EnrichedSearchResults = {};
 
 /**
- * @typedef MergedDocumentSearchResults Array<{{
- *   id: number|string,
- *   doc: Object|undefined,
- *   field: Array<string>,
- *   highlight: string|undefined
- * }}>
+ * @typedef Array<{
+ *   field: (string|undefined),
+ *   tag: (string|undefined),
+ *   result: SearchResults
+ * }>
  */
-export const MergedDocumentSearchResults = {};
+export let DocumentSearchResults = {};
 
 /**
- * @typedef EncoderOptions {{
- *   rtl: boolean=false,
- *   dedupe: boolean=true,
- *   split: string|undefined,
- *   include: EncoderSplitOptions|undefined,
- *   exclude: EncoderSplitOptions|undefined,
- *   prepare: function(string):string|undefined,
- *   finalize: function(Array<>string>):Array<string>|undefined,
- *   filter: Set|undefined,
- *   matcher: Map|undefined,
- *   mapper: Map|undefined,
- *   stemmer: Map|undefined,
- *   replacer: Array<string|RegExp>|undefined,
- *   minlength: number=1,
- *   maxlength: number|undefined,
- *   cache: boolean=true,
+ * @typedef Array<{
+ *   field: (string|undefined),
+ *   tag: (string|undefined),
+ *   highlight: (string|undefined),
+ *   result: Array<{
+ *      id: (number|string),
+ *      doc: (Object|null)
+ *   }>
+ * }>
+ */
+export let EnrichedDocumentSearchResults = {};
+
+/**
+ * @typedef Array<{
+ *   id: (number|string),
+ *   doc: (Object|null),
+ *   field: (Array<string>|undefined),
+ *   tag: (Array<string>|undefined)
+ * }>
+ */
+export let MergedDocumentSearchResults = {};
+
+/**
+ * @typedef {{
+ *   letter: (boolean|undefined),
+ *   number: (boolean|undefined),
+ *   symbol: (boolean|undefined),
+ *   punctuation: (boolean|undefined),
+ *   control: (boolean|undefined),
+ *   char: (string|Array<string>|undefined)
  * }}
  */
-export const EncoderOptions = {};
+export let EncoderSplitOptions = {};
 
 /**
- * @typedef EncoderSplitOptions {{
- *   letter: boolean=false,
- *   number: boolean=false,
- *   symbol: boolean=false,
- *   punctuation: boolean=false,
- *   control: boolean=false,
- *   char: string|Array<string>|undefined,
+ * @typedef {{
+ *   rtl: (boolean|undefined),
+ *   dedupe: (boolean|undefined),
+ *   include: (EncoderSplitOptions|undefined),
+ *   exclude: (EncoderSplitOptions|undefined),
+ *   split: (string|boolean|undefined),
+ *   normalize: (boolean|(function(string):string)|undefined),
+ *   prepare: ((function(string):string)|undefined),
+ *   finalize: ((function(Array<string>):(Array<string>|void))|undefined),
+ *   filter: (Set<string>|undefined),
+ *   matcher: (Map<string, string>|undefined),
+ *   mapper: (Map<string, string>|undefined),
+ *   stemmer: (Map<string, string>|undefined),
+ *   replacer: (Array<string|RegExp, string>|undefined),
+ *   minlength: (number|undefined),
+ *   maxlength: (number|undefined),
+ *   cache: (boolean|undefined)
  * }}
  */
-export const EncoderSplitOptions = {};
+export let EncoderOptions = {};
 
 /**
- * @typedef PersistentOptions {{
- *   name: string="flexsearch",
- *   field: string|undefined,
- *   type: string|undefined,
- *   db: *|undefined
+ * @typedef {{
+ *   name: (string|undefined),
+ *   field: (string|undefined),
+ *   type: (string|undefined),
+ *   db: (StorageInterface|undefined)
  * }}
  */
-export const PersistentOptions = {};
+export let PersistentOptions = {};
 
 /**
- * @typedef ResolverOptions {{
- *   index: Index|undefined,
- *   query: string,
- *   limit: [number=0],
- *   offset: [number=0],
- *   enrich: boolean=false,
- *   resolve: boolean=false,
- *   suggest: boolean=false
+ * @typedef {{
+ *   index: (Index|undefined),
+ *   query: (string|undefined),
+ *   limit: (number|undefined),
+ *   offset: (number|undefined),
+ *   enrich: (boolean|undefined),
+ *   resolve: (boolean|undefined),
+ *   suggest: (boolean|undefined),
+ *   and: (ResolverOptions|Array<ResolverOptions>|undefined),
+ *   or: (ResolverOptions|Array<ResolverOptions>|undefined),
+ *   xor: (ResolverOptions|Array<ResolverOptions>|undefined),
+ *   not: (ResolverOptions|Array<ResolverOptions>|undefined)
  * }}
  */
-export const ResolverOptions = {};
\ No newline at end of file
+export let ResolverOptions = {};
\ No newline at end of file
diff --git a/dist/module/worker.js b/dist/module/worker.js
index 39ca44d..fa1feac 100644
--- a/dist/module/worker.js
+++ b/dist/module/worker.js
@@ -9,7 +9,7 @@ let pid = 0;
  * @constructor
  */
 
-export default function WorkerIndex(options = {}) {
+export default function WorkerIndex(options = /** @type IndexOptions */{}) {
 
     if (!this || this.constructor !== WorkerIndex) {
         return new WorkerIndex(options);
diff --git a/dist/module/worker/handler.js b/dist/module/worker/handler.js
index 8bc5fc1..4b77dc7 100644
--- a/dist/module/worker/handler.js
+++ b/dist/module/worker/handler.js
@@ -15,12 +15,12 @@ export default (async function (data) {
 
         case "init":
 
-            /** @type IndexOptions */
+            /** @type {IndexOptions} */
             let options = data.options || {},
                 filepath = options.config;
 
             if (filepath) {
-                options = filepath;
+                options = options;
                 // will be replaced after build with the line below because
                 // there is an issue with closure compiler dynamic import
                 options = (await import(filepath))["default"];
diff --git a/example/browser-legacy/basic-persistent/index.html b/example/browser-legacy/basic-persistent/index.html
index 07cf6e0..2b0c0a4 100644
--- a/example/browser-legacy/basic-persistent/index.html
+++ b/example/browser-legacy/basic-persistent/index.html
@@ -6,7 +6,7 @@
   <title>Example: browser-legacy-basic-persistent</title>
 </head>
 <body style="white-space: pre">
-<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/9e1b24a124c3d0065b4ddf5cea9d109aca2fb7d2/dist/flexsearch.bundle.min.js"></script>
+<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.bundle.min.js"></script>
 <script>
 (async function(){
 
diff --git a/example/browser-legacy/basic-resolver/index.html b/example/browser-legacy/basic-resolver/index.html
index c4ad6a2..a68f3c6 100644
--- a/example/browser-legacy/basic-resolver/index.html
+++ b/example/browser-legacy/basic-resolver/index.html
@@ -6,7 +6,7 @@
   <title>Example: browser-legacy-basic-resolver</title>
 </head>
 <body style="white-space: pre">
-<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/9e1b24a124c3d0065b4ddf5cea9d109aca2fb7d2/dist/flexsearch.bundle.min.js"></script>
+<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.bundle.min.js"></script>
 <script>
 
   // create a simple index which can store id-content-pairs
diff --git a/example/browser-legacy/basic-suggestion/index.html b/example/browser-legacy/basic-suggestion/index.html
index 52f2522..6b856b6 100644
--- a/example/browser-legacy/basic-suggestion/index.html
+++ b/example/browser-legacy/basic-suggestion/index.html
@@ -6,7 +6,7 @@
   <title>Example: browser-legacy-basic-suggestion</title>
 </head>
 <body style="white-space: pre">
-<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/9e1b24a124c3d0065b4ddf5cea9d109aca2fb7d2/dist/flexsearch.light.min.js"></script>
+<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.light.min.js"></script>
 <script>
 
   // create a simple index which can store id-content-pairs
diff --git a/example/browser-legacy/basic-worker/index.html b/example/browser-legacy/basic-worker/index.html
index 6179323..2ab7343 100644
--- a/example/browser-legacy/basic-worker/index.html
+++ b/example/browser-legacy/basic-worker/index.html
@@ -6,7 +6,7 @@
   <title>Example: browser-legacy-basic-worker</title>
 </head>
 <body style="white-space: pre">
-<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/9e1b24a124c3d0065b4ddf5cea9d109aca2fb7d2/dist/flexsearch.bundle.min.js"></script>
+<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.bundle.min.js"></script>
 <script>
 (async function(){
 
diff --git a/example/browser-legacy/basic/index.html b/example/browser-legacy/basic/index.html
index f2b5883..e1bf9d0 100644
--- a/example/browser-legacy/basic/index.html
+++ b/example/browser-legacy/basic/index.html
@@ -6,7 +6,7 @@
   <title>Example: browser-legacy-basic</title>
 </head>
 <body style="white-space: pre">
-<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/9e1b24a124c3d0065b4ddf5cea9d109aca2fb7d2/dist/flexsearch.light.min.js"></script>
+<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.light.min.js"></script>
 <script>
 
   // create a simple index which can store id-content-pairs
diff --git a/example/browser-legacy/document-highlighting/index.html b/example/browser-legacy/document-highlighting/index.html
index 8f859b1..60ba950 100644
--- a/example/browser-legacy/document-highlighting/index.html
+++ b/example/browser-legacy/document-highlighting/index.html
@@ -6,7 +6,7 @@
   <title>Example: browser-legacy-document-highlighting</title>
 </head>
 <body style="white-space: pre">
-<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/9e1b24a124c3d0065b4ddf5cea9d109aca2fb7d2/dist/flexsearch.compact.min.js"></script>
+<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.compact.min.js"></script>
 <script type="module">
 
   // some test data
diff --git a/example/browser-legacy/document-persistent/index.html b/example/browser-legacy/document-persistent/index.html
index 11c7b2a..1b6bb00 100644
--- a/example/browser-legacy/document-persistent/index.html
+++ b/example/browser-legacy/document-persistent/index.html
@@ -6,7 +6,7 @@
   <title>Example: browser-legacy-document-persistent</title>
 </head>
 <body style="white-space: pre">
-<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/9e1b24a124c3d0065b4ddf5cea9d109aca2fb7d2/dist/flexsearch.bundle.min.js"></script>
+<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.bundle.min.js"></script>
 <script>
 (async function(){
 
diff --git a/example/browser-legacy/document-worker/index.html b/example/browser-legacy/document-worker/index.html
index 0474ca7..853b1ee 100644
--- a/example/browser-legacy/document-worker/index.html
+++ b/example/browser-legacy/document-worker/index.html
@@ -6,7 +6,7 @@
   <title>Example: browser-legacy-document-worker</title>
 </head>
 <body style="white-space: pre">
-<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/9e1b24a124c3d0065b4ddf5cea9d109aca2fb7d2/dist/flexsearch.bundle.min.js"></script>
+<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.bundle.min.js"></script>
 <script>
 (async function(){
 
diff --git a/example/browser-legacy/document/index.html b/example/browser-legacy/document/index.html
index a663897..1ae1d53 100644
--- a/example/browser-legacy/document/index.html
+++ b/example/browser-legacy/document/index.html
@@ -6,7 +6,7 @@
   <title>Example: browser-legacy-document</title>
 </head>
 <body style="white-space: pre">
-<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/9e1b24a124c3d0065b4ddf5cea9d109aca2fb7d2/dist/flexsearch.compact.min.js"></script>
+<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.compact.min.js"></script>
 <script>
 
   // some test data
diff --git a/example/browser-legacy/language-pack/index.html b/example/browser-legacy/language-pack/index.html
index 17a85c7..097df6a 100644
--- a/example/browser-legacy/language-pack/index.html
+++ b/example/browser-legacy/language-pack/index.html
@@ -6,9 +6,9 @@
   <title>Example: browser-legacy-language-packs</title>
 </head>
 <body style="white-space: pre">
-<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/9e1b24a124c3d0065b4ddf5cea9d109aca2fb7d2/dist/flexsearch.compact.min.js"></script>
+<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.compact.min.js"></script>
 <!-- Load language pack after loading the library -->
-<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/9e1b24a124c3d0065b4ddf5cea9d109aca2fb7d2/dist/lang/en.min.js"></script>
+<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/lang/en.min.js"></script>
 <script>
 
   const encoder = new FlexSearch.Encoder(
diff --git a/example/browser-module/basic-persistent/index.html b/example/browser-module/basic-persistent/index.html
index 8dc8bdf..a02a7fd 100644
--- a/example/browser-module/basic-persistent/index.html
+++ b/example/browser-module/basic-persistent/index.html
@@ -8,7 +8,7 @@
 <body style="white-space: pre">
 <script type="module">
 
-  import { Index, IndexedDB } from "https://rawcdn.githack.com/nextapps-de/flexsearch/9e1b24a124c3d0065b4ddf5cea9d109aca2fb7d2/dist/flexsearch.bundle.module.min.js";
+  import { Index, IndexedDB } from "https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.bundle.module.min.js";
 
   // create DB instance with namespace
   const db = new IndexedDB("my-store");
diff --git a/example/browser-module/basic-resolver/index.html b/example/browser-module/basic-resolver/index.html
index a2881e5..913f975 100644
--- a/example/browser-module/basic-resolver/index.html
+++ b/example/browser-module/basic-resolver/index.html
@@ -8,7 +8,7 @@
 <body style="white-space: pre">
 <script type="module">
 
-  import { Index, Resolver } from "https://rawcdn.githack.com/nextapps-de/flexsearch/9e1b24a124c3d0065b4ddf5cea9d109aca2fb7d2/dist/flexsearch.bundle.module.min.js";
+  import { Index, Resolver } from "https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.bundle.module.min.js";
 
   // create a simple index which can store id-content-pairs
   const index = new Index({
diff --git a/example/browser-module/basic-suggestion/index.html b/example/browser-module/basic-suggestion/index.html
index 5bb4563..0290d87 100644
--- a/example/browser-module/basic-suggestion/index.html
+++ b/example/browser-module/basic-suggestion/index.html
@@ -8,7 +8,7 @@
 <body style="white-space: pre">
 <script type="module">
 
-  import { Index } from "https://rawcdn.githack.com/nextapps-de/flexsearch/9e1b24a124c3d0065b4ddf5cea9d109aca2fb7d2/dist/flexsearch.light.module.min.js";
+  import { Index } from "https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.light.module.min.js";
 
   // create a simple index which can store id-content-pairs
   const index = new Index({
diff --git a/example/browser-module/basic-worker-extern-config/config.js b/example/browser-module/basic-worker-extern-config/config.js
index c6410b7..973e2b9 100644
--- a/example/browser-module/basic-worker-extern-config/config.js
+++ b/example/browser-module/basic-worker-extern-config/config.js
@@ -1,4 +1,4 @@
-import { Encoder } from "https://rawcdn.githack.com/nextapps-de/flexsearch/9e1b24a124c3d0065b4ddf5cea9d109aca2fb7d2/dist/flexsearch.bundle.module.min.js";
+import { Encoder } from "https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.bundle.module.min.js";
 
 export default {
     tokenize: "forward",
diff --git a/example/browser-module/basic/index.html b/example/browser-module/basic/index.html
index fb069fb..4f6705c 100644
--- a/example/browser-module/basic/index.html
+++ b/example/browser-module/basic/index.html
@@ -8,7 +8,7 @@
 <body style="white-space: pre">
 <script type="module">
 
-  import { Index } from "https://rawcdn.githack.com/nextapps-de/flexsearch/9e1b24a124c3d0065b4ddf5cea9d109aca2fb7d2/dist/flexsearch.light.module.min.js";
+  import { Index } from "https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.light.module.min.js";
 
   // create a simple index which can store id-content-pairs
   const index = new Index({
diff --git a/example/browser-module/document-highlighting/index.html b/example/browser-module/document-highlighting/index.html
index 0ec5692..b6dbe9f 100644
--- a/example/browser-module/document-highlighting/index.html
+++ b/example/browser-module/document-highlighting/index.html
@@ -8,7 +8,7 @@
 <body style="white-space: pre">
 <script type="module">
 
-  import { Document, Charset } from "https://rawcdn.githack.com/nextapps-de/flexsearch/9e1b24a124c3d0065b4ddf5cea9d109aca2fb7d2/dist/flexsearch.compact.module.min.js";
+  import { Document, Charset } from "https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.compact.module.min.js";
 
   // some test data
   const data = [{
diff --git a/example/browser-module/document-persistent/index.html b/example/browser-module/document-persistent/index.html
index 37adea0..5b2da35 100644
--- a/example/browser-module/document-persistent/index.html
+++ b/example/browser-module/document-persistent/index.html
@@ -8,7 +8,7 @@
 <body style="white-space: pre">
 <script type="module">
 
-  import { Document, Charset, IndexedDB } from "https://rawcdn.githack.com/nextapps-de/flexsearch/9e1b24a124c3d0065b4ddf5cea9d109aca2fb7d2/dist/flexsearch.bundle.module.min.js";
+  import { Document, Charset, IndexedDB } from "https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.bundle.module.min.js";
 
   // some test data
   const data = [{
diff --git a/example/browser-module/document-worker-extern-config/config.originalTitle.js b/example/browser-module/document-worker-extern-config/config.originalTitle.js
index bdd4c74..437c543 100644
--- a/example/browser-module/document-worker-extern-config/config.originalTitle.js
+++ b/example/browser-module/document-worker-extern-config/config.originalTitle.js
@@ -1,5 +1,5 @@
-import { Encoder, Charset } from "https://rawcdn.githack.com/nextapps-de/flexsearch/9e1b24a124c3d0065b4ddf5cea9d109aca2fb7d2/dist/flexsearch.bundle.module.min.js";
-import EnglishPreset from "https://rawcdn.githack.com/nextapps-de/flexsearch/9e1b24a124c3d0065b4ddf5cea9d109aca2fb7d2/dist/module/lang/en.js";
+import { Encoder, Charset } from "https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.bundle.module.min.js";
+import EnglishPreset from "https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/module/lang/en.js";
 
 export default {
     tokenize: "forward",
diff --git a/example/browser-module/document-worker-extern-config/config.primaryTitle.js b/example/browser-module/document-worker-extern-config/config.primaryTitle.js
index bdd4c74..437c543 100644
--- a/example/browser-module/document-worker-extern-config/config.primaryTitle.js
+++ b/example/browser-module/document-worker-extern-config/config.primaryTitle.js
@@ -1,5 +1,5 @@
-import { Encoder, Charset } from "https://rawcdn.githack.com/nextapps-de/flexsearch/9e1b24a124c3d0065b4ddf5cea9d109aca2fb7d2/dist/flexsearch.bundle.module.min.js";
-import EnglishPreset from "https://rawcdn.githack.com/nextapps-de/flexsearch/9e1b24a124c3d0065b4ddf5cea9d109aca2fb7d2/dist/module/lang/en.js";
+import { Encoder, Charset } from "https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.bundle.module.min.js";
+import EnglishPreset from "https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/module/lang/en.js";
 
 export default {
     tokenize: "forward",
diff --git a/example/browser-module/document/index.html b/example/browser-module/document/index.html
index a463436..5c6c621 100644
--- a/example/browser-module/document/index.html
+++ b/example/browser-module/document/index.html
@@ -8,7 +8,7 @@
 <body style="white-space: pre">
 <script type="module">
 
-  import { Document, Charset } from "https://rawcdn.githack.com/nextapps-de/flexsearch/9e1b24a124c3d0065b4ddf5cea9d109aca2fb7d2/dist/flexsearch.compact.module.min.js";
+  import { Document, Charset } from "https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.compact.module.min.js";
 
   // some test data
   const data = [{
diff --git a/example/browser-module/language-pack/index.html b/example/browser-module/language-pack/index.html
index 240245b..781a0f8 100644
--- a/example/browser-module/language-pack/index.html
+++ b/example/browser-module/language-pack/index.html
@@ -8,8 +8,8 @@
 <body style="white-space: pre">
 <script type="module">
 
-  import { Index, Encoder, Charset } from "https://rawcdn.githack.com/nextapps-de/flexsearch/9e1b24a124c3d0065b4ddf5cea9d109aca2fb7d2/dist/flexsearch.compact.module.min.js";
-  import EnglishPreset from "https://rawcdn.githack.com/nextapps-de/flexsearch/9e1b24a124c3d0065b4ddf5cea9d109aca2fb7d2/dist/module/lang/en.js";
+  import { Index, Encoder, Charset } from "https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.compact.module.min.js";
+  import EnglishPreset from "https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/module/lang/en.js";
 
   const encoder = new Encoder(
     Charset.LatinSimple,
diff --git a/index.d.ts b/index.d.ts
index 9b321db..96eaf53 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -1,5 +1,6 @@
 declare module "flexsearch" {
-    // Type definitions for flexsearch 0.7
+
+    // Type definitions for flexsearch 0.8
     // Project: https://github.com/nextapps-de/flexsearch/
     // Definitions by: LOSSES Don <https://github.com/Losses>
     // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
@@ -7,16 +8,11 @@ declare module "flexsearch" {
     /************************************/
     /* Utils                            */
     /************************************/
-    export type Id = number | string;
-    export type Limit = number;
-    export type ExportHandler<T> = (id: string | number, value: T) => void;
-    export type AsyncCallback<T = undefined> = T extends undefined
-        ? () => void
-        : (result: T) => void;
-    export type UnknownFunction = (...x: unknown[]) => unknown;
-
-    export type StoreOption = boolean | string | string[];
-    export type EnrichStoreOption = true | string | string[];
+    type Id = number | string;
+    type Limit = number;
+    type ExportHandler = (key: string, data: string) => void;
+    type ExportHandlerAsync = (key: string, data: string) => Promise<void>;
+    type AsyncCallback<T> = (result?: T) => Promise<void>;
 
     /************************************/
     /* Common Options                   */
@@ -26,140 +22,196 @@ declare module "flexsearch" {
      * **Document:**
      * * Presets: https://github.com/nextapps-de/flexsearch#presets
      */
-    export type Preset = "memory" | "performance" | "match" | "score" | "default";
+    type Preset =
+        | "memory"
+        | "performance"
+        | "match"
+        | "score"
+        | "default";
 
     /**
      * **Document:**
      * * Tokenizer: https://github.com/nextapps-de/flexsearch#tokenizer-prefix-search
      * * Add custom tokenizer: https://github.com/nextapps-de/flexsearch#add-custom-tokenizer
      */
-    export type Tokenizer =
+    type Tokenizer =
         | "strict"
         | "forward"
         | "reverse"
-        | "full"
-        | ((x: string) => string[]);
+        | "full";
 
     /**
      * **Document:**
      * * Encoders: https://github.com/nextapps-de/flexsearch#encoders
      */
-    export type Encoders =
-        | false
-        | "default"
-        | "simple"
-        | "balance"
-        | "advanced"
-        | "extra"
+    type Encoders =
+        | "LatinExact"
+        | "LatinDefault"
+        | "LatinSimple"
+        | "LatinBalance"
+        | "LatinAdvanced"
+        | "LatinExtra"
+        | "LatinSoundex"
+        | "ArabicDefault"
+        | "CjkDefault"
+        | "CryllicDefault"
         | ((x: string) => string[]);
 
     /**
      * **Document:**
+     * * Context Options: https://github.com/nextapps-de/flexsearch#context-options
      * * Contextual search: https://github.com/nextapps-de/flexsearch#contextual
      */
-    export interface ContextOptions {
+
+    type ContextOptions = {
         resolution: number;
-        depth: false | number;
+        depth: number;
         bidirectional: boolean;
-    }
+    };
 
     /**
      * **Document:**
      * * Search options: https://github.com/nextapps-de/flexsearch#search-options
      */
-    export interface SearchOptions {
+    type SearchOptions = {
         query?: string;
         limit?: number;
         offset?: number;
         suggest?: boolean;
-    }
+        resolution?: number;
+        context?: boolean;
+        resolve?: boolean;
+        enrich?: boolean;
+    };
 
     /**
      * **Document:**
      * * The document descriptor: https://github.com/nextapps-de/flexsearch#the-document-descriptor
      */
-    export interface Descriptor<T, Store extends StoreOption = false> {
-        id: string | number;
-        field: string[] | Array<IndexOptions<T, Store>>;
-    }
+    type DocumentDescriptor = {
+        id?: string | "id";
+        field?: FieldName | FieldName[] | FieldOptions | Array<FieldOptions>;
+        index?: FieldName | FieldName[] | FieldOptions | Array<FieldOptions>;
+        tag?: FieldName | FieldName[] | TagOptions | Array<TagOptions>;
+        store?: FieldName | FieldName[] | StoreOptions | Array<StoreOptions>;
+    };
 
-    /**
-     * **Document:**
-     * * Context Options: https://github.com/nextapps-de/flexsearch#context-options
-     */
-    export interface ContextOptions {
-        resolution: number;
-        depth: false | number;
-        bidirectional: boolean;
-    }
-
-    /**
-     * **Document:**
-     * * Charset options: https://github.com/nextapps-de/flexsearch#charset-options
-     */
-    export interface CharsetOptions {
-        split: false | string | RegExp;
-        rtl: boolean;
-        encode: (x: string) => string[];
-    }
-
-    export interface Stemmer {
-        [key: string]: string;
-    }
-
-    export interface Matcher {
-        [key: string]: string;
-    }
-
-    export type FilterFunction = (x: string) => boolean;
-    export type FilterArray = string[];
+    type WorkerURL = string;
+    type WorkerPath = string;
+    type WorkerConfigURL = string;
+    type WorkerConfigPath = string;
+    type SerializedFunctionString = string;
+    type FieldName = string;
+    type TemplateResultHighlighting = string;
 
     /**
      * **Document:**
      * * Language Options: https://github.com/nextapps-de/flexsearch#language-options
      * * Language: https://github.com/nextapps-de/flexsearch#languages
      */
-    export interface LanguageOptions {
-        stemmer: false | string | Stemmer | UnknownFunction;
-        filter: false | string | FilterArray | FilterFunction;
-        matcher: false | string | Matcher | UnknownFunction;
-    }
+
+    type EncoderOptions = {
+        rtl?: boolean;
+        dedupe?: boolean;
+        include?: EncoderSplitOptions;
+        exclude?: EncoderSplitOptions;
+        split?: string|RegExp|""|false;
+        prepare?: (str: string) => string;
+        finalize?: (terms: string[]) => string[];
+        filter?: Set<string>;
+        matcher?: Map<string, string>;
+        mapper?: Map<string, string>;
+        stemmer?: Map<string, string>;
+        replacer?: [string|RegExp, string|""];
+        minlength?: number;
+        maxlength?: number;
+        cache?: boolean|number;
+    };
+
+    type EncoderSplitOptions = {
+        letter?: boolean;
+        number?: boolean;
+        symbol?: boolean;
+        punctuation?: boolean;
+        control?: boolean;
+        char?: string|string[];
+    };
+
+    export type Charset = {
+        LatinExact: EncoderOptions;
+        LatinDefault: EncoderOptions;
+        LatinSimple: EncoderOptions;
+        LatinBalance: EncoderOptions;
+        LatinAdvanced: EncoderOptions;
+        LatinExtra: EncoderOptions;
+        LatinSoundex: EncoderOptions;
+        ArabicDefault: EncoderOptions;
+        CjkDefault: EncoderOptions;
+        CyrillicDefault: EncoderOptions;
+    };
 
     /**
-     * These options will determine how the documents be indexed.
-     *
-     * **Generic type parameters:**
-     *
-     * @template T The type of the document.
-     * @template Store If store is enabled.
+     * These options will determine how the contents will be indexed.
      *
      * **Document:**
      * * Index options: https://github.com/nextapps-de/flexsearch#index-options
+     * * Tokenizer: https://github.com/nextapps-de/flexsearch#tokenizer
+     * * Encoder: https://github.com/nextapps-de/flexsearch#encoder
+     * * Context: https://github.com/nextapps-de/flexsearch#context
+     * * Resolver: https://github.com/nextapps-de/flexsearch#resolver
+     * * Keystore: https://github.com/nextapps-de/flexsearch#keystore
+     * * Persistent: https://github.com/nextapps-de/flexsearch#persistent
+     * * Right-To-Left: https://github.com/nextapps-de/flexsearch#rtl
      * * Language: https://github.com/nextapps-de/flexsearch#languages
      */
-    export interface IndexOptions<T, Store extends StoreOption = false> {
+    type IndexOptions = {
         preset?: Preset;
         tokenize?: Tokenizer;
         cache?: boolean | number;
         resolution?: number;
-        context?: boolean | IndexOptions<T, Store> | ContextOptions;
-        optimize?: boolean;
-        boost?: (words: string[], term: string, index: number) => number;
+        context?: ContextOptions | boolean;
+        keystore?: number;
+        resolve?: boolean;
+        fastupdate?: boolean;
+        score?: (
+            content: string[],
+            term: string,
+            term_index: number,
+            partial: string,
+            partial_index: number
+        ) => number;
+
+        // Persistent-specific options
+        db?: StorageInterface;
+        commit?: boolean;
 
         // Language-specific Options and Encoding
-        charset?: CharsetOptions | string;
-        language?: LanguageOptions | string;
-        encode?: Encoders;
-        stemmer?: LanguageOptions["stemmer"];
-        filter?: LanguageOptions["filter"];
-        matcher?: LanguageOptions["matcher"];
-    }
+        encoder?: Charset | Encoders | EncoderOptions;
+        encode?: ((x: string) => string[]),
+        rtl?: boolean;
+    };
+
+    type WorkerIndexOptions = IndexOptions & {
+        config?: WorkerConfigURL | WorkerConfigPath,
+        db: null,
+        commit: null
+    };
 
     /************************************/
     /* Index Search                     */
     /************************************/
 
-    export type IndexSearchResult = Id[];
+    type DefaultSearchResults = Id[];
+    type IntermediateSearchResults = Array<Id[]>;
+    type EnrichedSearchResults = Array<{
+        id: Id;
+        score: number;
+    }>;
+    type SearchResults =
+        DefaultSearchResults |
+        IntermediateSearchResults |
+        EnrichedSearchResults |
+        Promise<SearchResults>;
 
     /**
      * **Document:**
@@ -169,53 +221,78 @@ declare module "flexsearch" {
      */
 
     export class Index {
-        constructor(x?: Preset | IndexOptions<string>);
-        add(id: Id, item: string): this;
-        append(id: Id, item: string): this;
-        update(id: Id, item: string): this;
-        remove(target: Id): this;
-        search(query: string, options?: Limit | SearchOptions): IndexSearchResult;
-        search(
-            query: string,
-            limit: number,
-            options: SearchOptions
-        ): IndexSearchResult;
-        search(options: SearchOptions): IndexSearchResult;
-
+        constructor(options?: Preset | IndexOptions);
+        add(id: Id, content: string): this | Promise<this>;
+        /**
+         * @deprecated The method "append" will be removed in an upcoming release, just use "add" instead
+         */
+        append(id: Id, content: string): this | Promise<this>;
+        update(id: Id, content: string): this | Promise<this>;
+        remove(id: Id): this | Promise<this>;
+        search(query: string, options?: Limit | SearchOptions): SearchResults;
+        search(query: string, limit: number, options: SearchOptions): SearchResults;
+        search(options: SearchOptions): SearchResults;
+        searchCache(query: string, options?: Limit | SearchOptions): SearchResults;
+        searchCache(query: string, limit: number, options: SearchOptions): SearchResults;
+        searchCache(options: SearchOptions): SearchResults;
         // https://github.com/nextapps-de/flexsearch#check-existence-of-already-indexed-ids
-        contain(id: Id): boolean;
+        contain(id: Id): boolean | Promise<boolean>;
+        clear(): void | Promise<void>;
+        cleanup(): void | Promise<void>;
 
-        export(handler: ExportHandler<string>): Promise<void>;
-        import(id: Id, item: string): Promise<void>;
+        // Export and Import
+        export(handler: ExportHandler): void;
+        export(handler: ExportHandlerAsync): Promise<void>;
+        import(key: string, data: string): void;
+        serialize(with_function_wrapper?: boolean): SerializedFunctionString;
+
+        // Persistent Index
+        mount(db: StorageInterface): Promise<void>;
+        commit(replace_all_contents?: boolean): Promise<void>;
+        destroy(): Promise<void>;
 
         // Async Methods
+        /** @deprecated The "async" variants are deprecated, instead use the default variant */
         addAsync(
             id: Id,
-            item: string,
-            callback?: AsyncCallback<this>
+            content: string,
+            callback?: AsyncCallback<void>
         ): Promise<this>;
+        /** @deprecated The "async" variants are deprecated, instead use the default variant */
         appendAsync(
             id: Id,
-            item: string,
-            callback?: AsyncCallback<this>
+            content: string,
+            callback?: AsyncCallback<void>
         ): Promise<this>;
+        /** @deprecated The "async" variants are deprecated, instead use the default variant */
         updateAsync(
             id: Id,
-            item: string,
-            callback?: AsyncCallback<this>
+            content: string,
+            callback?: AsyncCallback<void>
         ): Promise<this>;
-        removeAsync(target: Id, callback?: AsyncCallback<this>): Promise<this>;
+        /** @deprecated The "async" variants are deprecated, instead use the default variant */
+        removeAsync(
+            id: Id,
+            callback?: AsyncCallback<void>
+        ): Promise<this>;
+        /** @deprecated The "async" variants are deprecated, instead use the default variant */
         searchAsync(
             query: string,
             options?: Limit | SearchOptions,
-            callback?: AsyncCallback<IndexSearchResult>
-        ): Promise<IndexSearchResult>;
+            callback?: AsyncCallback<SearchResults>
+        ): Promise<SearchResults>
+        /** @deprecated The "async" variants are deprecated, instead use the default variant */
         searchAsync(
             query: string,
-            limit: number,
-            options?: Limit | SearchOptions
-        ): IndexSearchResult;
-        searchAsync(options: SearchOptions): Promise<IndexSearchResult>;
+            limit: Limit,
+            options?: SearchOptions,
+            callback?: AsyncCallback<SearchResults>
+        ): Promise<SearchResults>;
+        /** @deprecated The "async" variants are deprecated, instead use the default variant */
+        searchAsync(
+            options: SearchOptions,
+            callback?: AsyncCallback<SearchResults>
+        ): Promise<SearchResults>;
     }
 
     /**
@@ -224,100 +301,79 @@ declare module "flexsearch" {
      * * API overview: https://github.com/nextapps-de/flexsearch#api-overview
      * * Worker index: https://github.com/nextapps-de/flexsearch#worker-index
      */
-    export class Worker {
-        constructor(x?: Preset | IndexOptions<string>);
 
-        add(id: Id, item: string, callback?: AsyncCallback<Worker>): Promise<this>;
-        append(id: Id, item: string, callback?: AsyncCallback<this>): Promise<this>;
-        update(id: Id, item: string, callback?: AsyncCallback<this>): Promise<this>;
-        remove(target: Id, callback?: AsyncCallback<this>): Promise<this>;
-        search(
-            query: string,
-            options?: Limit | SearchOptions,
-            callback?: AsyncCallback<IndexSearchResult>
-        ): Promise<IndexSearchResult>;
-        search(
-            query: string,
-            limit: number,
-            options?: Limit | SearchOptions
-        ): IndexSearchResult;
-        search(options: SearchOptions): Promise<IndexSearchResult>;
-
-        // Async Methods
-        addAsync(
-            id: Id,
-            item: string,
-            callback?: AsyncCallback<this>
-        ): Promise<this>;
-        appendAsync(
-            id: Id,
-            item: string,
-            callback?: AsyncCallback<this>
-        ): Promise<this>;
-        updateAsync(
-            id: Id,
-            item: string,
-            callback?: AsyncCallback<this>
-        ): Promise<this>;
-        removeAsync(target: Id, callback?: AsyncCallback<this>): Promise<this>;
-        searchAsync(
-            query: string,
-            options?: Limit | SearchOptions,
-            callback?: AsyncCallback<IndexSearchResult>
-        ): Promise<IndexSearchResult>;
-        searchAsync(
-            query: string,
-            limit: number,
-            options?: Limit | SearchOptions
-        ): IndexSearchResult;
-        searchAsync(options: SearchOptions): Promise<IndexSearchResult>;
+    export class Worker extends Index {
+        constructor(options?: Preset | WorkerIndexOptions);
     }
 
     /************************************/
     /* Document Search                  */
     /************************************/
 
+    type FieldOptions = IndexOptions & {
+        field: FieldName,
+        filter?: (content: string) => boolean;
+        custom?: (content: string) => string;
+        config?: WorkerConfigURL | WorkerConfigPath;
+        resolve: true;
+    };
+
+    type TagOptions = {
+        field: FieldName;
+        filter?: (content: string) => boolean;
+        custom?: (content: string) => string;
+        db?: StorageInterface;
+        resolve: true;
+    };
+
+    type StoreOptions = {
+        field: FieldName;
+        filter?: (content: string) => boolean;
+        custom?: (content: string) => string;
+        db?: StorageInterface;
+        resolve: true;
+    };
+
     /*
      * **Document:**
      * * Document options: https://github.com/nextapps-de/flexsearch#document-options
      */
-    export interface DocumentOptions<T, Store extends StoreOption = false> {
-        id: string;
-        tag?: false | string;
-        index:
-            | string
-            | string[]
-            | Array<IndexOptions<T, Store> & { field: string }>;
-        store?: Store;
-    }
 
-    /*
-     * **Document:**
-     * * Index options: https://github.com/nextapps-de/flexsearch#index-options
-     */
-    export interface IndexOptionsForDocumentSearch<
-        T,
-        Store extends StoreOption = false
-    > extends IndexOptions<T, Store> {
-        // Additional Options for Document Indexes
-        worker?: boolean;
-        document?: DocumentOptions<T, Store> | Descriptor<T, Store>;
-    }
+    type DocumentOptions = IndexOptions & {
+        worker?: boolean | WorkerURL | WorkerPath;
+        doc?: DocumentDescriptor | DocumentDescriptor[];
+        document?: DocumentDescriptor | DocumentDescriptor[];
+        resolve: true;
+    };
 
-    export interface SimpleDocumentSearchResultSetUnit {
-        field: string;
-        result: Id[];
-    }
+    type DefaultDocumentSearchResults = Array<{
+        field?: FieldName;
+        tag?: FieldName;
+        result: DefaultSearchResults;
+    }>;
 
-    export interface EnrichedDocumentSearchResultSetUnitResultUnit<T> {
-        id: Id[];
-        doc: T;
-    }
+    type EnrichedDocumentSearchResults = Array<{
+        field?: FieldName;
+        tag?: FieldName;
+        highlight?: TemplateResultHighlighting;
+        result: Array<{
+            id: Id;
+            doc: Object | null;
+        }>;
+    }>;
 
-    export interface EnrichedDocumentSearchResultSetUnit<T> {
-        field: string;
-        result: Array<EnrichedDocumentSearchResultSetUnitResultUnit<T>>;
-    }
+    type MergedDocumentSearchResults = Array<{
+        id: Id;
+        doc: Object | null;
+        field?: FieldName[];
+        tag?: FieldName[];
+    }>;
+
+    type DocumentSearchResults =
+        DefaultDocumentSearchResults |
+        EnrichedDocumentSearchResults |
+        MergedDocumentSearchResults |
+        Promise<DocumentSearchResults>;
 
     /**
      *  # Document Search Result
@@ -328,24 +384,32 @@ declare module "flexsearch" {
      *
      *  If neither of these conditions is met, then the returned result will be a `ISimpleDocumentSearchResult`.
      */
-    export type DocumentSearchResult<
-        T,
-        Store extends StoreOption = false,
-        Enrich extends boolean = false
-    > = [Store, Enrich] extends [EnrichStoreOption, true]
-        ? Array<EnrichedDocumentSearchResultSetUnit<T>>
-        : SimpleDocumentSearchResultSetUnit[];
 
     /**
      * **Document:**
      * * Document search options: https://github.com/nextapps-de/flexsearch#document-search-options
      */
-    export interface DocumentSearchOptions<T extends boolean> extends SearchOptions {
-        index?: string | string[] | SearchOptions[];
-        tag?: string | string[];
-        enrich?: T;
-        bool?: "and" | "or";
-    }
+
+    type DocumentSearchOptions = SearchOptions & {
+        tag?: Object | Array<Object>;
+        field?: Array<DocumentSearchOptions> | Array<string> | string;
+        index?: Array<DocumentSearchOptions> | Array<string>;
+        pluck?: FieldName;
+        merge?: boolean;
+        hightlight?: TemplateResultHighlighting;
+    };
+
+    type DocumentValue =
+        | string
+        | number
+        | boolean
+        | null
+        | DocumentValue[]
+        | {[key: string]: DocumentValue};
+
+    type DocumentData = {
+        [k: string]: DocumentValue;
+    };
 
     /**
      * **Document:**
@@ -353,76 +417,178 @@ declare module "flexsearch" {
      * * API overview: https://github.com/nextapps-de/flexsearch#api-overview
      * * Document store: https://github.com/nextapps-de/flexsearch#document-store
      */
-    export class Document<T, Store extends StoreOption = false> {
-        constructor(
-            options: IndexOptionsForDocumentSearch<T, Store>,
-            typeHack?: T
-        );
-        add(document: T): this;
-        add(id: Id, document: T): this;
-        append(document: T): this;
-        append(id: Id, document: T): this;
-        update(document: T): this;
-        update(id: Id, document: T): this;
-        remove(target: Id | T): this;
-        search(query: string, limit?: number): SimpleDocumentSearchResultSetUnit[];
+    export class Document {
+        constructor(options: DocumentOptions);
 
+        add(id: Id, document: DocumentData): this | Promise<this>;
+        add(document: DocumentData): this | Promise<this>;
+        /** @deprecated The method "append" will be removed in an upcoming release, just use "add" instead */
+        append(id: Id, document: DocumentData): this | Promise<this>;
+        /** @deprecated The method "append" will be removed in an upcoming release, just use "add" instead */
+        append(document: DocumentData): this | Promise<this>;
+        update(id: Id, document: DocumentData): this | Promise<this>;
+        update(document: DocumentData): this | Promise<this>;
+        remove(id: Id): this | Promise<this>;
+        remove(document: DocumentData): this | Promise<this>;
         // https://github.com/nextapps-de/flexsearch#field-search
-        search(
-            query: string,
-            options: string[] | Partial<DocumentSearchOptions<boolean>>
-        ): SimpleDocumentSearchResultSetUnit[];
+        search(query: string, options?: Limit | DocumentSearchOptions): DocumentSearchResults;
+        search(query: string, limit: number, options: DocumentSearchOptions): DocumentSearchResults;
+        search(options: DocumentSearchOptions): DocumentSearchResults;
+        searchCache(query: string, options?: Limit | DocumentSearchOptions): DocumentSearchResults;
+        searchCache(query: string, limit: number, options: DocumentSearchOptions): DocumentSearchResults;
+        searchCache(options: DocumentSearchOptions): DocumentSearchResults;
+        // https://github.com/nextapps-de/flexsearch#check-existence-of-already-indexed-ids
+        contain(id: Id): boolean | Promise<boolean>;
+        clear(): void | Promise<void>;
+        cleanup(): void | Promise<void>;
 
-        search<Enrich extends boolean = false>(
-            query: string,
-            limit?: number,
-            options?: Partial<DocumentSearchOptions<Enrich>>
-        ): DocumentSearchResult<T, Store, Enrich>;
-        search(
-            options: Partial<DocumentSearchOptions<boolean>>
-        ): SimpleDocumentSearchResultSetUnit[];
-        export(handler: ExportHandler<T>): Promise<void>;
-        import(id: Id, document: T): Promise<void>;
+        // Export and Import
+        export(handler: ExportHandler): void;
+        export(handler: ExportHandlerAsync): Promise<void>;
+        import(key: string, data: string): void;
+
+        // Persistent Index
+        mount(db: StorageInterface): Promise<void>;
+        commit(replace_all_contents?: boolean): Promise<void>;
+        destroy(): Promise<void>;
 
         // Async Methods
-        addAsync(id: Id, document: T, callback?: AsyncCallback): Promise<this>;
-        appendAsync(id: Id, document: T, callback?: AsyncCallback): Promise<this>;
-        updateAsync(id: Id, document: T, callback?: AsyncCallback): Promise<this>;
-        removeAsync(target: Id | T, callback?: AsyncCallback): Promise<this>;
-        searchAsync<Enrich extends boolean = false>(
-            query: string,
-            options: string[] | Partial<DocumentSearchOptions<Enrich>>
-        ): Promise<DocumentSearchResult<T, Store, Enrich>>;
+        /** @deprecated The "async" variants are deprecated, instead use the default variant */
+        addAsync(
+            id: Id,
+            document: DocumentData,
+            callback?: AsyncCallback<void>
+        ): Promise<this>;
+        /** @deprecated The "async" variants are deprecated, instead use the default variant */
+        addAsync(
+            document: DocumentData,
+            callback?: AsyncCallback<void>
+        ): Promise<this>;
+        /** @deprecated The "async" variants are deprecated, instead use the default variant */
+        appendAsync(
+            id: Id,
+            document: DocumentData,
+            callback?: AsyncCallback<void>
+        ): Promise<this>;
+        /** @deprecated The "async" variants are deprecated, instead use the default variant */
+        appendAsync(
+            document: DocumentData,
+            callback?: AsyncCallback<void>
+        ): Promise<this>;
+        /** @deprecated The "async" variants are deprecated, instead use the default variant */
+        updateAsync(
+            id: Id,
+            document: DocumentData,
+            callback?: AsyncCallback<void>
+        ): Promise<this>;
+        /** @deprecated The "async" variants are deprecated, instead use the default variant */
+        updateAsync(
+            document: DocumentData,
+            callback?: AsyncCallback<void>
+        ): Promise<this>;
+        /** @deprecated The "async" variants are deprecated, instead use the default variant */
+        removeAsync(
+            id: Id,
+            callback?: AsyncCallback<void>
+        ): Promise<this>;
+        /** @deprecated The "async" variants are deprecated, instead use the default variant */
+        removeAsync(
+            document: DocumentData,
+            callback?: AsyncCallback<void>
+        ): Promise<this>;
+        /** @deprecated The "async" variants are deprecated, instead use the default variant */
         searchAsync(
             query: string,
-            limit?: number
-        ): Promise<SimpleDocumentSearchResultSetUnit[]>;
+            options?: Limit | DocumentSearchOptions,
+            callback?: AsyncCallback<DocumentSearchResults>
+        ): Promise<DocumentSearchResults>
+        /** @deprecated The "async" variants are deprecated, instead use the default variant */
         searchAsync(
             query: string,
             limit: number,
-            callback: AsyncCallback<SimpleDocumentSearchResultSetUnit[]>
-        ): Promise<this>;
-        searchAsync<Enrich extends boolean = false>(
-            query: string,
-            options: Partial<DocumentSearchOptions<Enrich>>,
-            callback: AsyncCallback<DocumentSearchResult<T, Store, Enrich>>
-        ): Promise<this>;
-        searchAsync<Enrich extends boolean = false>(
-            options: Partial<DocumentSearchOptions<Enrich>>
-        ): Promise<DocumentSearchResult<T, Store, Enrich>>;
-        searchAsync<Enrich extends boolean = false>(
-            options: Partial<DocumentSearchOptions<Enrich>>,
-            callback: AsyncCallback<DocumentSearchResult<T, Store, Enrich>>
-        ): Promise<this>;
+            options?: DocumentSearchOptions,
+            callback?: AsyncCallback<DocumentSearchResults>
+        ): Promise<DocumentSearchResults>;
+        /** @deprecated The "async" variants are deprecated, instead use the default variant */
+        searchAsync(
+            options: DocumentSearchOptions,
+            callback?: AsyncCallback<DocumentSearchResults>
+        ): Promise<DocumentSearchResults>;
     }
 
-    /************************************/
-    /* Miscellaneous                    */
-    /************************************/
-    export function create(options: IndexOptions<string>): Index;
-    export function registerCharset(name: string, charset: CharsetOptions): void;
-    export function registerLanguage(
-        name: string,
-        language: LanguageOptions
-    ): void;
-}
\ No newline at end of file
+    type IdType =
+        "text" |
+        "char" |
+        "varchar" |
+        "string" |
+        "number" |
+        "numeric" |
+        "integer" |
+        "smallint" |
+        "tinyint" |
+        "mediumint" |
+        "int" |
+        "int8" |
+        "uint8" |
+        "int16" |
+        "uint16" |
+        "int32" |
+        "uint32" |
+        "int64" |
+        "uint64" |
+        "bigint";
+
+    type PersistentOptions = {
+        name?: string;
+        type?: IdType;
+        db?: StorageInterface;
+    };
+
+    type DefaultResolve = {
+        query?: string;
+        limit?: number;
+        offset?: number;
+        enrich?: boolean;
+    };
+
+    type ResolverOptions = DefaultResolve & {
+        index?: Index;
+        resolve?: boolean;
+        suggest?: boolean;
+        and?: ResolverOptions | Array<ResolverOptions>;
+        or?: ResolverOptions | Array<ResolverOptions>;
+        xor?: ResolverOptions | Array<ResolverOptions>;
+        not?: ResolverOptions | Array<ResolverOptions>;
+    };
+
+    export class Encoder {
+        constructor(options?: EncoderOptions);
+        assign(options: EncoderOptions): this;
+        encode(content: string): string[];
+        addMapper(char_match: string, char_replace: string): this;
+        addMatcher(match: string, replace: string): this;
+        addStemmer(match: string, replace: string): this;
+        addFilter(term: string): this;
+        addReplacer(match: string | RegExp, replace: string): this;
+    }
+
+    export class Resolver {
+        constructor(options?: ResolverOptions | IntermediateSearchResults);
+        limit(limit: number): this;
+        offset(offset: number): this;
+        boost(boost: number): this;
+        resolve(options?: DefaultResolve): SearchResults;
+        result: IntermediateSearchResults
+    }
+
+    export class StorageInterface {
+        constructor(name: string, config: PersistentOptions);
+        constructor(config: string | PersistentOptions);
+        mount(index: Index | Document) : Promise<void>;
+        open() : Promise<void>;
+        close() : Promise<void>;
+        destroy() : Promise<void>;
+        clear() : Promise<void>;
+        db: any;
+    }
+}
diff --git a/src/webpack.js b/src/bundle.js
similarity index 86%
rename from src/webpack.js
rename to src/bundle.js
index 6d25a58..ecbc11b 100644
--- a/src/webpack.js
+++ b/src/bundle.js
@@ -15,7 +15,7 @@ import {
     ContextOptions,
     DocumentDescriptor,
     DocumentSearchOptions,
-    DocumentIndexOptions,
+    FieldOptions,
     IndexOptions,
     DocumentOptions,
     TagOptions,
@@ -75,6 +75,14 @@ if(SUPPORT_PERSISTENT){
 /** @export */ Index.prototype.encoder;
 }
 
+/** @export */ Encoder.prototype.assign;
+/** @export */ Encoder.prototype.encode;
+/** @export */ Encoder.prototype.addMatcher;
+/** @export */ Encoder.prototype.addStemmer;
+/** @export */ Encoder.prototype.addFilter;
+/** @export */ Encoder.prototype.addMapper;
+/** @export */ Encoder.prototype.addReplacer;
+
 /** @export */ Document.prototype.add;
 /** @export */ Document.prototype.append;
 /** @export */ Document.prototype.search;
@@ -105,6 +113,7 @@ if(SUPPORT_PERSISTENT){
 /** @export */ Resolver.prototype.and;
 /** @export */ Resolver.prototype.xor;
 /** @export */ Resolver.prototype.not;
+/** @export */ Resolver.prototype.result;
 
 /** @export */ StorageInterface.db;
 /** @export */ StorageInterface.id;
@@ -147,25 +156,27 @@ if(SUPPORT_PERSISTENT){
 /** @export */ IndexOptions.cache;
 /** @export */ IndexOptions.resolve;
 /** @export */ IndexOptions.db;
-/** @export */ IndexOptions.config;
+/** @export */ IndexOptions.worker; // worker url
+/** @export */ IndexOptions.config; // config url
 
-/** @export */ DocumentIndexOptions.preset;
-/** @export */ DocumentIndexOptions.context;
-/** @export */ DocumentIndexOptions.encoder;
-/** @export */ DocumentIndexOptions.encode;
-/** @export */ DocumentIndexOptions.resolution;
-/** @export */ DocumentIndexOptions.tokenize;
-/** @export */ DocumentIndexOptions.fastupdate;
-/** @export */ DocumentIndexOptions.score;
-/** @export */ DocumentIndexOptions.keystore;
-/** @export */ DocumentIndexOptions.rtl;
-/** @export */ DocumentIndexOptions.cache;
-/** @export */ DocumentIndexOptions.db;
-/** @export */ DocumentIndexOptions.config;
-// /** @export */ DocumentIndexOptions.resolve;
-/** @export */ DocumentIndexOptions.field;
-/** @export */ DocumentIndexOptions.filter;
-/** @export */ DocumentIndexOptions.custom;
+/** @export */ FieldOptions.preset;
+/** @export */ FieldOptions.context;
+/** @export */ FieldOptions.encoder;
+/** @export */ FieldOptions.encode;
+/** @export */ FieldOptions.resolution;
+/** @export */ FieldOptions.tokenize;
+/** @export */ FieldOptions.fastupdate;
+/** @export */ FieldOptions.score;
+/** @export */ FieldOptions.keystore;
+/** @export */ FieldOptions.rtl;
+/** @export */ FieldOptions.cache;
+/** @export */ FieldOptions.db;
+/** @export */ FieldOptions.config;
+/** @export */ FieldOptions.resolve;
+/** @export */ FieldOptions.field;
+/** @export */ FieldOptions.filter;
+/** @export */ FieldOptions.custom;
+/** @export */ FieldOptions.worker;
 
 /** @export */ DocumentOptions.context;
 /** @export */ DocumentOptions.encoder;
@@ -211,6 +222,7 @@ if(SUPPORT_PERSISTENT){
 /** @export */ SearchOptions.suggest;
 /** @export */ SearchOptions.resolve;
 /** @export */ SearchOptions.enrich;
+/** @export */ SearchOptions.resolution;
 
 /** @export */ DocumentSearchOptions.query;
 /** @export */ DocumentSearchOptions.limit;
@@ -260,6 +272,10 @@ if(SUPPORT_PERSISTENT){
 /** @export */ ResolverOptions.enrich;
 /** @export */ ResolverOptions.resolve;
 /** @export */ ResolverOptions.suggest;
+/** @export */ ResolverOptions.and;
+/** @export */ ResolverOptions.or;
+/** @export */ ResolverOptions.xor;
+/** @export */ ResolverOptions.not;
 
 const FlexSearch = {
     "Index": Index,
@@ -302,6 +318,18 @@ if(RELEASE !== "bundle.module" &&
     }
 }
 else{
+
     /** @export */
     window.FlexSearch = FlexSearch;
 }
+
+export default FlexSearch;
+export {
+    Index,
+    Document,
+    Encoder,
+    Charset,
+    WorkerIndex as Worker,
+    Resolver,
+    IdxDB as IndexedDB
+};
diff --git a/src/cache.js b/src/cache.js
index 7e28332..3b222ec 100644
--- a/src/cache.js
+++ b/src/cache.js
@@ -1,10 +1,11 @@
 import Index from "./index.js";
 import Document from "./document.js";
+import { SearchOptions, DocumentSearchOptions } from "./type.js";
 
 /**
- * @param {string|Object} query
- * @param {number|Object=} limit
- * @param {Object=} options
+ * @param {string|SearchOptions|DocumentSearchOptions} query
+ * @param {number|SearchOptions|DocumentSearchOptions=} limit
+ * @param {SearchOptions|DocumentSearchOptions=} options
  * @this {Index|Document}
  * @returns {Array<number|string>|Promise}
  */
diff --git a/src/charset/latin/soundex.js b/src/charset/latin/soundex.js
index 3176db5..8de08be 100644
--- a/src/charset/latin/soundex.js
+++ b/src/charset/latin/soundex.js
@@ -1,6 +1,6 @@
 import { EncoderOptions } from "../../type.js";
 
-/** @type EncoderOptions */
+/** @type {EncoderOptions} */
 const options = {
     normalize: true,
     dedupe: false,
diff --git a/src/db/indexeddb/index.js b/src/db/indexeddb/index.js
index 64a55c8..39ee67e 100644
--- a/src/db/indexeddb/index.js
+++ b/src/db/indexeddb/index.js
@@ -45,7 +45,7 @@ export default function IdxDB(name, config = {}){
     }
     if(typeof name === "object"){
         name = name.name;
-        config = name;
+        config = /** @type PersistentOptions */ (name);
     }
     if(!name){
         console.info("Default storage space was used, because a name was not passed.");
diff --git a/src/db/sqlite/package-lock.json b/src/db/sqlite/package-lock.json
new file mode 100644
index 0000000..a721643
--- /dev/null
+++ b/src/db/sqlite/package-lock.json
@@ -0,0 +1,1348 @@
+{
+  "name": "flexsearch-sqlite",
+  "version": "0.1.0",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "flexsearch-sqlite",
+      "version": "0.1.0",
+      "dependencies": {
+        "sqlite3": "^5.1.7"
+      }
+    },
+    "node_modules/@gar/promisify": {
+      "version": "1.1.3",
+      "resolved": "https://registry.npmjs.org/@gar/promisify/-/promisify-1.1.3.tgz",
+      "integrity": "sha512-k2Ty1JcVojjJFwrg/ThKi2ujJ7XNLYaFGNB/bWT9wGR+oSMJHMa5w+CUq6p/pVrKeNNgA7pCqEcjSnHVoqJQFw==",
+      "optional": true
+    },
+    "node_modules/@npmcli/fs": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/@npmcli/fs/-/fs-1.1.1.tgz",
+      "integrity": "sha512-8KG5RD0GVP4ydEzRn/I4BNDuxDtqVbOdm8675T49OIG/NGhaK0pjPX7ZcDlvKYbA+ulvVK3ztfcF4uBdOxuJbQ==",
+      "optional": true,
+      "dependencies": {
+        "@gar/promisify": "^1.0.1",
+        "semver": "^7.3.5"
+      }
+    },
+    "node_modules/@npmcli/move-file": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/@npmcli/move-file/-/move-file-1.1.2.tgz",
+      "integrity": "sha512-1SUf/Cg2GzGDyaf15aR9St9TWlb+XvbZXWpDx8YKs7MLzMH/BCeopv+y9vzrzgkfykCGuWOlSu3mZhj2+FQcrg==",
+      "deprecated": "This functionality has been moved to @npmcli/fs",
+      "optional": true,
+      "dependencies": {
+        "mkdirp": "^1.0.4",
+        "rimraf": "^3.0.2"
+      },
+      "engines": {
+        "node": ">=10"
+      }
+    },
+    "node_modules/@tootallnate/once": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/@tootallnate/once/-/once-1.1.2.tgz",
+      "integrity": "sha512-RbzJvlNzmRq5c3O09UipeuXno4tA1FE6ikOjxZK0tuxVv3412l64l5t1W5pj4+rJq9vpkm/kwiR07aZXnsKPxw==",
+      "optional": true,
+      "engines": {
+        "node": ">= 6"
+      }
+    },
+    "node_modules/abbrev": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.1.1.tgz",
+      "integrity": "sha512-nne9/IiQ/hzIhY6pdDnbBtz7DjPTKrY00P/zvPSm5pOFkl6xuGrGnXn/VtTNNfNtAfZ9/1RtehkszU9qcTii0Q==",
+      "optional": true
+    },
+    "node_modules/agent-base": {
+      "version": "6.0.2",
+      "resolved": "https://registry.npmjs.org/agent-base/-/agent-base-6.0.2.tgz",
+      "integrity": "sha512-RZNwNclF7+MS/8bDg70amg32dyeZGZxiDuQmZxKLAlQjr3jGyLx+4Kkk58UO7D2QdgFIQCovuSuZESne6RG6XQ==",
+      "optional": true,
+      "dependencies": {
+        "debug": "4"
+      },
+      "engines": {
+        "node": ">= 6.0.0"
+      }
+    },
+    "node_modules/agentkeepalive": {
+      "version": "4.6.0",
+      "resolved": "https://registry.npmjs.org/agentkeepalive/-/agentkeepalive-4.6.0.tgz",
+      "integrity": "sha512-kja8j7PjmncONqaTsB8fQ+wE2mSU2DJ9D4XKoJ5PFWIdRMa6SLSN1ff4mOr4jCbfRSsxR4keIiySJU0N9T5hIQ==",
+      "optional": true,
+      "dependencies": {
+        "humanize-ms": "^1.2.1"
+      },
+      "engines": {
+        "node": ">= 8.0.0"
+      }
+    },
+    "node_modules/aggregate-error": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/aggregate-error/-/aggregate-error-3.1.0.tgz",
+      "integrity": "sha512-4I7Td01quW/RpocfNayFdFVk1qSuoh0E7JrbRJ16nH01HhKFQ88INq9Sd+nd72zqRySlr9BmDA8xlEJ6vJMrYA==",
+      "optional": true,
+      "dependencies": {
+        "clean-stack": "^2.0.0",
+        "indent-string": "^4.0.0"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/ansi-regex": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz",
+      "integrity": "sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==",
+      "optional": true,
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/aproba": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/aproba/-/aproba-2.0.0.tgz",
+      "integrity": "sha512-lYe4Gx7QT+MKGbDsA+Z+he/Wtef0BiwDOlK/XkBrdfsh9J/jPPXbX0tE9x9cl27Tmu5gg3QUbUrQYa/y+KOHPQ==",
+      "optional": true
+    },
+    "node_modules/are-we-there-yet": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/are-we-there-yet/-/are-we-there-yet-3.0.1.tgz",
+      "integrity": "sha512-QZW4EDmGwlYur0Yyf/b2uGucHQMa8aFUP7eu9ddR73vvhFyt4V0Vl3QHPcTNJ8l6qYOBdxgXdnBXQrHilfRQBg==",
+      "deprecated": "This package is no longer supported.",
+      "optional": true,
+      "dependencies": {
+        "delegates": "^1.0.0",
+        "readable-stream": "^3.6.0"
+      },
+      "engines": {
+        "node": "^12.13.0 || ^14.15.0 || >=16.0.0"
+      }
+    },
+    "node_modules/balanced-match": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz",
+      "integrity": "sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw==",
+      "optional": true
+    },
+    "node_modules/base64-js": {
+      "version": "1.5.1",
+      "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.5.1.tgz",
+      "integrity": "sha512-AKpaYlHn8t4SVbOHCy+b5+KKgvR4vrsD8vbvrbiQJps7fKDTkjkDry6ji0rUJjC0kzbNePLwzxq8iypo41qeWA==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ]
+    },
+    "node_modules/bindings": {
+      "version": "1.5.0",
+      "resolved": "https://registry.npmjs.org/bindings/-/bindings-1.5.0.tgz",
+      "integrity": "sha512-p2q/t/mhvuOj/UeLlV6566GD/guowlr0hHxClI0W9m7MWYkL1F0hLo+0Aexs9HSPCtR1SXQ0TD3MMKrXZajbiQ==",
+      "dependencies": {
+        "file-uri-to-path": "1.0.0"
+      }
+    },
+    "node_modules/bl": {
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/bl/-/bl-4.1.0.tgz",
+      "integrity": "sha512-1W07cM9gS6DcLperZfFSj+bWLtaPGSOHWhPiGzXmvVJbRLdG82sH/Kn8EtW1VqWVA54AKf2h5k5BbnIbwF3h6w==",
+      "dependencies": {
+        "buffer": "^5.5.0",
+        "inherits": "^2.0.4",
+        "readable-stream": "^3.4.0"
+      }
+    },
+    "node_modules/brace-expansion": {
+      "version": "1.1.11",
+      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
+      "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
+      "optional": true,
+      "dependencies": {
+        "balanced-match": "^1.0.0",
+        "concat-map": "0.0.1"
+      }
+    },
+    "node_modules/buffer": {
+      "version": "5.7.1",
+      "resolved": "https://registry.npmjs.org/buffer/-/buffer-5.7.1.tgz",
+      "integrity": "sha512-EHcyIPBQ4BSGlvjB16k5KgAJ27CIsHY/2JBmCRReo48y9rQ3MaUzWX3KVlBa4U7MyX02HdVj0K7C3WaB3ju7FQ==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
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+      "integrity": "sha512-hlq8tAfn0m/61p4BVRcPzIGr6LKiMwo4VM6dGi6pt4qcRkmNzTcWq6eCEjEh+qXjkMDvPlOFFSGwQjoEa6gyMA==",
+      "bin": {
+        "semver": "bin/semver.js"
+      },
+      "engines": {
+        "node": ">=10"
+      }
+    },
+    "node_modules/set-blocking": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/set-blocking/-/set-blocking-2.0.0.tgz",
+      "integrity": "sha512-KiKBS8AnWGEyLzofFfmvKwpdPzqiy16LvQfK3yv/fVH7Bj13/wl3JSR1J+rfgRE9q7xUJK4qvgS8raSOeLUehw==",
+      "optional": true
+    },
+    "node_modules/signal-exit": {
+      "version": "3.0.7",
+      "resolved": "https://registry.npmjs.org/signal-exit/-/signal-exit-3.0.7.tgz",
+      "integrity": "sha512-wnD2ZE+l+SPC/uoS0vXeE9L1+0wuaMqKlfz9AMUo38JsyLSBWSFcHR1Rri62LZc12vLr1gb3jl7iwQhgwpAbGQ==",
+      "optional": true
+    },
+    "node_modules/simple-concat": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/simple-concat/-/simple-concat-1.0.1.tgz",
+      "integrity": "sha512-cSFtAPtRhljv69IK0hTVZQ+OfE9nePi/rtJmw5UjHeVyVroEqJXP1sFztKUy1qU+xvz3u/sfYJLa947b7nAN2Q==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ]
+    },
+    "node_modules/simple-get": {
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/simple-get/-/simple-get-4.0.1.tgz",
+      "integrity": "sha512-brv7p5WgH0jmQJr1ZDDfKDOSeWWg+OVypG99A/5vYGPqJ6pxiaHLy8nxtFjBA7oMa01ebA9gfh1uMCFqOuXxvA==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ],
+      "dependencies": {
+        "decompress-response": "^6.0.0",
+        "once": "^1.3.1",
+        "simple-concat": "^1.0.0"
+      }
+    },
+    "node_modules/smart-buffer": {
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/smart-buffer/-/smart-buffer-4.2.0.tgz",
+      "integrity": "sha512-94hK0Hh8rPqQl2xXc3HsaBoOXKV20MToPkcXvwbISWLEs+64sBq5kFgn2kJDHb1Pry9yrP0dxrCI9RRci7RXKg==",
+      "optional": true,
+      "engines": {
+        "node": ">= 6.0.0",
+        "npm": ">= 3.0.0"
+      }
+    },
+    "node_modules/socks": {
+      "version": "2.8.4",
+      "resolved": "https://registry.npmjs.org/socks/-/socks-2.8.4.tgz",
+      "integrity": "sha512-D3YaD0aRxR3mEcqnidIs7ReYJFVzWdd6fXJYUM8ixcQcJRGTka/b3saV0KflYhyVJXKhb947GndU35SxYNResQ==",
+      "optional": true,
+      "dependencies": {
+        "ip-address": "^9.0.5",
+        "smart-buffer": "^4.2.0"
+      },
+      "engines": {
+        "node": ">= 10.0.0",
+        "npm": ">= 3.0.0"
+      }
+    },
+    "node_modules/socks-proxy-agent": {
+      "version": "6.2.1",
+      "resolved": "https://registry.npmjs.org/socks-proxy-agent/-/socks-proxy-agent-6.2.1.tgz",
+      "integrity": "sha512-a6KW9G+6B3nWZ1yB8G7pJwL3ggLy1uTzKAgCb7ttblwqdz9fMGJUuTy3uFzEP48FAs9FLILlmzDlE2JJhVQaXQ==",
+      "optional": true,
+      "dependencies": {
+        "agent-base": "^6.0.2",
+        "debug": "^4.3.3",
+        "socks": "^2.6.2"
+      },
+      "engines": {
+        "node": ">= 10"
+      }
+    },
+    "node_modules/sprintf-js": {
+      "version": "1.1.3",
+      "resolved": "https://registry.npmjs.org/sprintf-js/-/sprintf-js-1.1.3.tgz",
+      "integrity": "sha512-Oo+0REFV59/rz3gfJNKQiBlwfHaSESl1pcGyABQsnnIfWOFt6JNj5gCog2U6MLZ//IGYD+nA8nI+mTShREReaA==",
+      "optional": true
+    },
+    "node_modules/sqlite3": {
+      "version": "5.1.7",
+      "resolved": "https://registry.npmjs.org/sqlite3/-/sqlite3-5.1.7.tgz",
+      "integrity": "sha512-GGIyOiFaG+TUra3JIfkI/zGP8yZYLPQ0pl1bH+ODjiX57sPhrLU5sQJn1y9bDKZUFYkX1crlrPfSYt0BKKdkog==",
+      "hasInstallScript": true,
+      "dependencies": {
+        "bindings": "^1.5.0",
+        "node-addon-api": "^7.0.0",
+        "prebuild-install": "^7.1.1",
+        "tar": "^6.1.11"
+      },
+      "optionalDependencies": {
+        "node-gyp": "8.x"
+      },
+      "peerDependencies": {
+        "node-gyp": "8.x"
+      },
+      "peerDependenciesMeta": {
+        "node-gyp": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/ssri": {
+      "version": "8.0.1",
+      "resolved": "https://registry.npmjs.org/ssri/-/ssri-8.0.1.tgz",
+      "integrity": "sha512-97qShzy1AiyxvPNIkLWoGua7xoQzzPjQ0HAH4B0rWKo7SZ6USuPcrUiAFrws0UH8RrbWmgq3LMTObhPIHbbBeQ==",
+      "optional": true,
+      "dependencies": {
+        "minipass": "^3.1.1"
+      },
+      "engines": {
+        "node": ">= 8"
+      }
+    },
+    "node_modules/string_decoder": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.3.0.tgz",
+      "integrity": "sha512-hkRX8U1WjJFd8LsDJ2yQ/wWWxaopEsABU1XfkM8A+j0+85JAGppt16cr1Whg6KIbb4okU6Mql6BOj+uup/wKeA==",
+      "dependencies": {
+        "safe-buffer": "~5.2.0"
+      }
+    },
+    "node_modules/string-width": {
+      "version": "4.2.3",
+      "resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.3.tgz",
+      "integrity": "sha512-wKyQRQpjJ0sIp62ErSZdGsjMJWsap5oRNihHhu6G7JVO/9jIB6UyevL+tXuOqrng8j/cxKTWyWUwvSTriiZz/g==",
+      "optional": true,
+      "dependencies": {
+        "emoji-regex": "^8.0.0",
+        "is-fullwidth-code-point": "^3.0.0",
+        "strip-ansi": "^6.0.1"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/strip-ansi": {
+      "version": "6.0.1",
+      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz",
+      "integrity": "sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==",
+      "optional": true,
+      "dependencies": {
+        "ansi-regex": "^5.0.1"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/strip-json-comments": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/strip-json-comments/-/strip-json-comments-2.0.1.tgz",
+      "integrity": "sha512-4gB8na07fecVVkOI6Rs4e7T6NOTki5EmL7TUduTs6bu3EdnSycntVJ4re8kgZA+wx9IueI2Y11bfbgwtzuE0KQ==",
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
+    "node_modules/tar": {
+      "version": "6.2.1",
+      "resolved": "https://registry.npmjs.org/tar/-/tar-6.2.1.tgz",
+      "integrity": "sha512-DZ4yORTwrbTj/7MZYq2w+/ZFdI6OZ/f9SFHR+71gIVUZhOQPHzVCLpvRnPgyaMpfWxxk/4ONva3GQSyNIKRv6A==",
+      "dependencies": {
+        "chownr": "^2.0.0",
+        "fs-minipass": "^2.0.0",
+        "minipass": "^5.0.0",
+        "minizlib": "^2.1.1",
+        "mkdirp": "^1.0.3",
+        "yallist": "^4.0.0"
+      },
+      "engines": {
+        "node": ">=10"
+      }
+    },
+    "node_modules/tar-fs": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/tar-fs/-/tar-fs-2.1.2.tgz",
+      "integrity": "sha512-EsaAXwxmx8UB7FRKqeozqEPop69DXcmYwTQwXvyAPF352HJsPdkVhvTaDPYqfNgruveJIJy3TA2l+2zj8LJIJA==",
+      "dependencies": {
+        "chownr": "^1.1.1",
+        "mkdirp-classic": "^0.5.2",
+        "pump": "^3.0.0",
+        "tar-stream": "^2.1.4"
+      }
+    },
+    "node_modules/tar-fs/node_modules/chownr": {
+      "version": "1.1.4",
+      "resolved": "https://registry.npmjs.org/chownr/-/chownr-1.1.4.tgz",
+      "integrity": "sha512-jJ0bqzaylmJtVnNgzTeSOs8DPavpbYgEr/b0YL8/2GO3xJEhInFmhKMUnEJQjZumK7KXGFhUy89PrsJWlakBVg=="
+    },
+    "node_modules/tar-stream": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/tar-stream/-/tar-stream-2.2.0.tgz",
+      "integrity": "sha512-ujeqbceABgwMZxEJnk2HDY2DlnUZ+9oEcb1KzTVfYHio0UE6dG71n60d8D2I4qNvleWrrXpmjpt7vZeF1LnMZQ==",
+      "dependencies": {
+        "bl": "^4.0.3",
+        "end-of-stream": "^1.4.1",
+        "fs-constants": "^1.0.0",
+        "inherits": "^2.0.3",
+        "readable-stream": "^3.1.1"
+      },
+      "engines": {
+        "node": ">=6"
+      }
+    },
+    "node_modules/tar/node_modules/minipass": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/minipass/-/minipass-5.0.0.tgz",
+      "integrity": "sha512-3FnjYuehv9k6ovOEbyOswadCDPX1piCfhV8ncmYtHOjuPwylVWsghTLo7rabjC3Rx5xD4HDx8Wm1xnMF7S5qFQ==",
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/tunnel-agent": {
+      "version": "0.6.0",
+      "resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.6.0.tgz",
+      "integrity": "sha512-McnNiV1l8RYeY8tBgEpuodCC1mLUdbSN+CYBL7kJsJNInOP8UjDDEwdk6Mw60vdLLrr5NHKZhMAOSrR2NZuQ+w==",
+      "dependencies": {
+        "safe-buffer": "^5.0.1"
+      },
+      "engines": {
+        "node": "*"
+      }
+    },
+    "node_modules/unique-filename": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/unique-filename/-/unique-filename-1.1.1.tgz",
+      "integrity": "sha512-Vmp0jIp2ln35UTXuryvjzkjGdRyf9b2lTXuSYUiPmzRcl3FDtYqAwOnTJkAngD9SWhnoJzDbTKwaOrZ+STtxNQ==",
+      "optional": true,
+      "dependencies": {
+        "unique-slug": "^2.0.0"
+      }
+    },
+    "node_modules/unique-slug": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/unique-slug/-/unique-slug-2.0.2.tgz",
+      "integrity": "sha512-zoWr9ObaxALD3DOPfjPSqxt4fnZiWblxHIgeWqW8x7UqDzEtHEQLzji2cuJYQFCU6KmoJikOYAZlrTHHebjx2w==",
+      "optional": true,
+      "dependencies": {
+        "imurmurhash": "^0.1.4"
+      }
+    },
+    "node_modules/util-deprecate": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
+      "integrity": "sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw=="
+    },
+    "node_modules/which": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
+      "integrity": "sha512-BLI3Tl1TW3Pvl70l3yq3Y64i+awpwXqsGBYWkkqMtnbXgrMD+yj7rhW0kuEDxzJaYXGjEW5ogapKNMEKNMjibA==",
+      "optional": true,
+      "dependencies": {
+        "isexe": "^2.0.0"
+      },
+      "bin": {
+        "node-which": "bin/node-which"
+      },
+      "engines": {
+        "node": ">= 8"
+      }
+    },
+    "node_modules/wide-align": {
+      "version": "1.1.5",
+      "resolved": "https://registry.npmjs.org/wide-align/-/wide-align-1.1.5.tgz",
+      "integrity": "sha512-eDMORYaPNZ4sQIuuYPDHdQvf4gyCF9rEEV/yPxGfwPkRodwEgiMUUXTx/dex+Me0wxx53S+NgUHaP7y3MGlDmg==",
+      "optional": true,
+      "dependencies": {
+        "string-width": "^1.0.2 || 2 || 3 || 4"
+      }
+    },
+    "node_modules/wrappy": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
+      "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ=="
+    },
+    "node_modules/yallist": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
+      "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A=="
+    }
+  }
+}
diff --git a/src/document.js b/src/document.js
index e9db5f5..f485de6 100644
--- a/src/document.js
+++ b/src/document.js
@@ -20,7 +20,7 @@ import {
 } from "./config.js";
 // <-- COMPILER BLOCK
 
-import { DocumentOptions, DocumentDescriptor, DocumentIndexOptions, StoreOptions } from "./type.js";
+import { IndexOptions, DocumentOptions, DocumentDescriptor, FieldOptions, StoreOptions } from "./type.js";
 import Index from "./index.js";
 import WorkerIndex from "./worker.js";
 import Cache, { searchCache } from "./cache.js";
@@ -43,8 +43,9 @@ export default function Document(options){
         return new Document(options);
     }
 
-    /** @type DocumentDescriptor */
-    const document = options.document || options.doc || options;
+    const document = /** @type DocumentDescriptor */ (
+        options.document || options.doc || options
+    );
     let tmp, keystore;
 
     this.tree = [];
@@ -61,7 +62,7 @@ export default function Document(options){
 
     if(SUPPORT_STORE){
         // todo support custom filter function
-        this.storetree = (tmp = document.store || null) && tmp !== true && [];
+        this.storetree = (tmp = document.store || null) && tmp && tmp !== true && [];
         this.store = tmp && (
             keystore && SUPPORT_KEYSTORE
                 ? new KeystoreMap(keystore)
@@ -167,7 +168,7 @@ if(SUPPORT_PERSISTENT){
                 let index;// = this.index.get(field);
                 //if(!index){
                     // create raw index when not exists
-                    this.index.set(field, index = new Index({}, this.reg));
+                    this.index.set(field, index = new Index(/** @type IndexOptions */ ({}), this.reg));
                     // copy and push to the field selection
                     if(fields === this.field){
                         fields = fields.slice(0);
@@ -259,7 +260,7 @@ function parse_descriptor(options, document){
             key = key.field;
         }
 
-        opt = /** @type DocumentIndexOptions */ (
+        opt = /** @type IndexOptions */ (
             is_object(opt)
                 ? Object.assign({}, options, opt)
                 : options
@@ -279,7 +280,7 @@ function parse_descriptor(options, document){
         }
 
         if(!SUPPORT_WORKER || !this.worker){
-            index.set(key, new Index(opt, this.reg));
+            index.set(key, new Index(/** @type IndexOptions */ (opt), this.reg));
         }
 
         if(opt.custom){
diff --git a/src/document/search.js b/src/document/search.js
index 1184821..8d627b7 100644
--- a/src/document/search.js
+++ b/src/document/search.js
@@ -1,14 +1,19 @@
 // COMPILER BLOCK -->
 import {
     DEBUG,
-    SUPPORT_PERSISTENT, SUPPORT_RESOLVER,
+    SUPPORT_PERSISTENT,
+    SUPPORT_RESOLVER,
     SUPPORT_STORE,
     SUPPORT_SUGGESTION,
     SUPPORT_TAGS
 } from "../config.js";
 // <-- COMPILER BLOCK
-
-import { DocumentSearchOptions } from "../type.js";
+import {
+    DocumentSearchOptions,
+    DocumentSearchResults,
+    EnrichedDocumentSearchResults,
+    MergedDocumentSearchResults
+} from "../type.js";
 import { create_object, is_array, is_object, is_string, parse_simple } from "../common.js";
 import { intersect_union } from "../intersect.js";
 import Document from "../document.js";
@@ -20,7 +25,7 @@ let debug = false;
  * @param {number|DocumentSearchOptions=} limit
  * @param {DocumentSearchOptions=} options
  * @param {Array<Array>=} _promises For internal use only.
- * @returns {Promise|Array}
+ * @returns {DocumentSearchResults|EnrichedDocumentSearchResults|MergedDocumentSearchResults|Promise<DocumentSearchResults|EnrichedDocumentSearchResults|MergedDocumentSearchResults>}
  */
 
 Document.prototype.search = function(query, limit, options, _promises){
@@ -38,16 +43,17 @@ Document.prototype.search = function(query, limit, options, _promises){
         }
     }
 
-    let result = [], result_field = [];
+    let result = [];
+    let result_field = [];
     let pluck, enrich, merge, suggest;
     let field, tag, offset, count = 0, resolve, highlight;
 
     if(options){
 
         if(is_array(options)){
-            options = {
+            options = /** @type DocumentSearchOptions */ ({
                 index: options
-            };
+            });
         }
 
         query = options.query || query;
diff --git a/src/index.js b/src/index.js
index e3deaf8..2bc040d 100644
--- a/src/index.js
+++ b/src/index.js
@@ -8,7 +8,6 @@
 
 // COMPILER BLOCK -->
 import {
-
     DEBUG,
     PROFILER,
     SUPPORT_ENCODER,
@@ -20,11 +19,10 @@ import {
     SUPPORT_KEYSTORE,
     SUPPORT_RESOLVER,
     SUPPORT_CHARSET
-
 } from "./config.js";
 // <-- COMPILER BLOCK
 
-import { IndexOptions, ContextOptions } from "./type.js";
+import { IndexOptions, ContextOptions, EncoderOptions } from "./type.js";
 import Encoder from "./encoder.js";
 import Cache, { searchCache } from "./cache.js";
 import Charset from "./charset.js";
@@ -53,12 +51,16 @@ export default function Index(options, _register){
 
     PROFILER && tick("Index.create");
 
-    options = options
-        ? apply_preset(options)
-        : {};
+    options = /** @type IndexOptions */ (
+        options
+            ? apply_preset(options)
+            : {}
+    );
 
+    let tmp = options.context;
     /** @type ContextOptions */
-    const context = options.context || {};
+    const context = tmp === true
+        ? { depth: 1 } : tmp || {};
     const encoder = SUPPORT_CHARSET && is_string(options.encoder)
         ? Charset[options.encoder]
         : options.encode || options.encoder || (
@@ -71,7 +73,7 @@ export default function Index(options, _register){
         ? encoder
         : typeof encoder === "object"
             ? (SUPPORT_ENCODER
-                ? new Encoder(encoder)
+                ? new Encoder(/** @type {EncoderOptions} */ (encoder))
                 : encoder
             )
             : { encode: encoder };
@@ -80,7 +82,6 @@ export default function Index(options, _register){
         this.compress = options.compress || options.compression || false;
     }
 
-    let tmp;
     this.resolution = options.resolution || 9;
     this.tokenize = tmp = options.tokenize || "strict";
     this.depth = (tmp === "strict" && context.depth) || 0;
@@ -98,7 +99,7 @@ export default function Index(options, _register){
             ? (tmp && SUPPORT_KEYSTORE ? new KeystoreMap(tmp) : new Map())
             : (tmp && SUPPORT_KEYSTORE ? new KeystoreSet(tmp) : new Set())
     );
-    this.resolution_ctx = context.resolution || 1;
+    this.resolution_ctx = context.resolution || 3;
     this.rtl = (encoder.rtl) || options.rtl || false;
 
     if(SUPPORT_CACHE){
diff --git a/src/index/search.js b/src/index/search.js
index c2d1c3b..9f0d7de 100644
--- a/src/index/search.js
+++ b/src/index/search.js
@@ -10,7 +10,7 @@ import {
 } from "../config.js";
 // <-- COMPILER BLOCK
 
-import { SearchOptions } from "../type.js";
+import { SearchOptions, SearchResults, EnrichedSearchResults } from "../type.js";
 import { create_object, is_object, sort_by_length_down } from "../common.js";
 import Index from "../index.js";
 import default_compress from "../compress.js";
@@ -27,7 +27,7 @@ export function set_resolve(resolve){
  * @param {string|SearchOptions} query
  * @param {number|SearchOptions=} limit
  * @param {SearchOptions=} options
- * @returns {Array|Resolver|Promise<Array|Resolver>}
+ * @returns {SearchResults|EnrichedSearchResults|Resolver|Promise<SearchResults|EnrichedSearchResults|Resolver>}
  */
 
 Index.prototype.search = function(query, limit, options){
@@ -45,7 +45,7 @@ Index.prototype.search = function(query, limit, options){
 
     let result = [];
     let length;
-    let context, suggest, offset = 0, resolve, enrich, tag, cache, boost;
+    let context, suggest, offset = 0, resolve, enrich, tag, cache, boost, resolution;
 
     if(options){
         query = options.query || query;
@@ -57,6 +57,7 @@ Index.prototype.search = function(query, limit, options){
         resolve || (global_resolve = 0);
         enrich = resolve && options.enrich;
         boost = options.boost;
+        resolution = options.resolution;
         tag = SUPPORT_PERSISTENT && SUPPORT_DOCUMENT && SUPPORT_TAGS && this.db && options.tag;
     }
     else{
@@ -67,15 +68,16 @@ Index.prototype.search = function(query, limit, options){
 
     // do not force a string as input
     // https://github.com/nextapps-de/flexsearch/issues/432
-    query = /** @type {Array<string>} */ (this.encoder.encode(query));
-    length = query.length;
+    /** @type {Array<string>} */
+    let query_terms = this.encoder.encode(query);
+    length = query_terms.length;
     limit || !resolve || (limit = 100);
 
     // fast path single term
     if(length === 1){
         return single_term_query.call(
             this,
-            query[0], // term
+            query_terms[0], // term
             "",       // ctx
             limit,
             offset,
@@ -94,8 +96,8 @@ Index.prototype.search = function(query, limit, options){
     if(length === 2 && context && !suggest){
         return single_term_query.call(
             this,
-            query[0], // term
-            query[1], // ctx
+            query_terms[0], // term
+            query_terms[1], // ctx
             limit,
             offset,
             resolve,
@@ -115,7 +117,7 @@ Index.prototype.search = function(query, limit, options){
         const query_new = [];
 
         // if(context){
-        //     keyword = query[0];
+        //     keyword = query_terms[0];
         //     dupes[keyword] = 1;
         //     query_new.push(keyword);
         //     maxlength = minlength = keyword.length;
@@ -124,7 +126,7 @@ Index.prototype.search = function(query, limit, options){
 
         for(let i = 0, term; i < length; i++){
 
-            term = query[i];
+            term = query_terms[i];
 
             if(term && !dupes[term]){
 
@@ -152,7 +154,7 @@ Index.prototype.search = function(query, limit, options){
             // }
         }
 
-        query = query_new;
+        query_terms = query_new;
         length = query.length;
     }
 
@@ -170,7 +172,7 @@ Index.prototype.search = function(query, limit, options){
     if(length === 1){
         return single_term_query.call(
             this,
-            query[0], // term
+            query_terms[0], // term
             "",       // ctx
             limit,
             offset,
@@ -184,8 +186,8 @@ Index.prototype.search = function(query, limit, options){
     if(length === 2 && context && !suggest){
         return single_term_query.call(
             this,
-            query[0], // term
-            query[1], // ctx
+            query_terms[0], // term
+            query_terms[1], // ctx
             limit,
             offset,
             resolve,
@@ -197,7 +199,7 @@ Index.prototype.search = function(query, limit, options){
     if(length > 1){
         if(context){
             // start with context right away
-            keyword = query[0];
+            keyword = query_terms[0];
             index = 1;
         }
         // todo
@@ -206,17 +208,21 @@ Index.prototype.search = function(query, limit, options){
             // bigger terms has less occurrence
             // this might also reduce the intersection task
             // todo check intersection order
-            query.sort(sort_by_length_down);
+            query_terms.sort(sort_by_length_down);
         }
     }
 
+    if(!resolution && resolution !== 0){
+        resolution = this.resolution;
+    }
+
     // from this point there are just multi-term queries
 
     if(SUPPORT_PERSISTENT && this.db){
 
         if(this.db.search){
             // when the configuration is not supported it returns false
-            const result = this.db.search(this, query, limit, offset, suggest, resolve, enrich, tag);
+            const result = this.db.search(this, query_terms, limit, offset, suggest, resolve, enrich, tag);
             if(result !== false) return result;
         }
 
@@ -225,7 +231,7 @@ Index.prototype.search = function(query, limit, options){
 
             for(let arr, term; index < length; index++){
 
-                term = query[index];
+                term = query_terms[index];
 
                 if(keyword){
 
@@ -255,7 +261,7 @@ Index.prototype.search = function(query, limit, options){
                         arr,
                         result,
                         suggest,
-                        self.resolution,
+                        resolution,
                         // 0, // /** @type {!number} */ (limit),
                         // 0, // offset,
                         // length === 1
@@ -289,14 +295,14 @@ Index.prototype.search = function(query, limit, options){
             }
 
             return !SUPPORT_RESOLVER || resolve
-                ? intersect(result, self.resolution, /** @type {number} */ (limit), offset, suggest, boost, resolve)
+                ? intersect(result, resolution, /** @type {number} */ (limit), offset, suggest, boost, resolve)
                 : new Resolver(result[0])
         }());
     }
 
     for(let arr, term; index < length; index++){
 
-        term = query[index];
+        term = query_terms[index];
 
         if(keyword){
 
@@ -325,7 +331,7 @@ Index.prototype.search = function(query, limit, options){
                 arr,
                 result,
                 suggest,
-                this.resolution,
+                resolution,
                 // 0, // /** @type {!number} */ (limit),
                 // 0, // offset,
                 // length === 1
@@ -352,13 +358,13 @@ Index.prototype.search = function(query, limit, options){
             }
             else if(length === 1){
                 return !SUPPORT_RESOLVER || resolve
-                    ? resolve_default(result[0], limit, offset)
+                    ? resolve_default(result[0], /** @type {number} */ (limit), offset)
                     : new Resolver(result[0]);
             }
         }
     }
 
-    result = intersect(result, this.resolution, limit, offset, suggest, boost, resolve);
+    result = intersect(result, resolution, limit, offset, suggest, boost, resolve);
 
     return !SUPPORT_RESOLVER || resolve
         ? result
@@ -403,8 +409,8 @@ function single_term_query(term, keyword, limit, offset, resolve, enrich, tag){
  * @private
  * @param {Array} arr
  * @param {Array} result
- * @param {Array} suggest
- * @param {number} resolution
+ * @param {boolean|null=} suggest
+ * @param {number=} resolution
  * @return {Array|boolean|undefined}
  */
 
diff --git a/src/lang/de.js b/src/lang/de.js
index af9d9bb..464f590 100644
--- a/src/lang/de.js
+++ b/src/lang/de.js
@@ -148,7 +148,7 @@ export const filter = new Set([
  * Example: The word "correct" and "correctness" could be the same word, so you can define {"ness": ""} to normalize the ending.
  * Object Definition: the key represents the word ending, the value contains the replacement (or empty string for removal).
  * http://snowball.tartarus.org/algorithms/german/stemmer.html
- * @type {Map<string>}
+ * @type {Map<string, string>}
  */
 
 export const stemmer = new Map([
@@ -177,7 +177,7 @@ export const stemmer = new Map([
 /**
  * Matcher replaces all occurrences of a given string regardless of its position and is also a kind of "partial normalization".
  * Object Definition: the key represents the target term, the value contains the search string which should be replaced (could also be an array of multiple terms).
- * @type {Map<string>}
+ * @type {Map<string, string>}
  */
 const map = new Map([
     ["_", " "],
diff --git a/src/lang/fr.js b/src/lang/fr.js
index 83e7b20..7624494 100644
--- a/src/lang/fr.js
+++ b/src/lang/fr.js
@@ -178,7 +178,7 @@ export const filter = new Set([
 ]);
 
 /**
- * @type {Object<string, string>}
+ * @type {Map<string, string>}
  */
 
 export const stemmer = new Map([
diff --git a/src/preset.js b/src/preset.js
index 88ee5fb..5a127eb 100644
--- a/src/preset.js
+++ b/src/preset.js
@@ -5,7 +5,7 @@ import { is_string } from "./common.js";
 import { IndexOptions } from "./type.js";
 
 /**
- * @enum {Object}
+ * @type {Object<string, IndexOptions>}
  * @const
  */
 
@@ -39,22 +39,26 @@ const presets = {
 
 /**
  *
- * @param {!IndexOptions|string} options
+ * @param {IndexOptions|string} options
  * @return {IndexOptions}
  */
 
 export default function apply_preset(options){
 
-    const preset = is_string(options)
-        ? options
-        : options["preset"];
+    const preset = /** @type string */ (
+        is_string(options)
+            ? options
+            : options.preset
+    );
 
     if(preset){
         if(DEBUG && !presets[preset]){
             console.warn("Preset not found: " + preset);
         }
-        options = Object.assign({}, presets[preset], /** @type {Object} */ (options));
+        options = /** @type IndexOptions */ (
+            Object.assign({}, presets[preset], /** @type {Object} */ (options))
+        );
     }
 
-    return options;
-}
\ No newline at end of file
+    return /** @type IndexOptions */ (options);
+}
diff --git a/src/resolve/default.js b/src/resolve/default.js
index f41702b..aa3ffc9 100644
--- a/src/resolve/default.js
+++ b/src/resolve/default.js
@@ -106,8 +106,8 @@ export default function(result, limit, offset, enrich){
 function enrich_result(ids){
     for(let i = 0; i < ids.length; i++){
         ids[i] = {
-            score: i,
-            id: ids[i]
+            "score": i,
+            "id": ids[i]
         };
     }
     return ids;
diff --git a/src/type.js b/src/type.js
index c9d87a9..4f1cdc2 100644
--- a/src/type.js
+++ b/src/type.js
@@ -5,230 +5,243 @@ import Encoder from "./encoder.js";
 import StorageInterface from "./db/interface.js";
 
 /**
- * @typedef IndexOptions {{
- *   preset: string|undefined,
+ * @typedef {{
+ *   preset: (string|undefined),
  *   context: (IndexOptions|undefined),
- *   encoder: Encoder|Function|Object|undefined,
- *   encode: Function|undefined,
- *   resolution: [number=9],
- *   tokenize: [string="strict"],
- *   fastupdate: [boolean:false],
- *   score: Function]|undefined,
- *   keystore: [number=0],
- *   rtl: [boolean=false],
- *   cache: [number=null],
- *   resolve: [boolean=true],
- *   db: StorageInterface|undefined,
- *   commit: boolean=true,
- *   worker: boolean|string|undefined,
- *   config: string|undefined
+ *   encoder: (Encoder|Function|Object|undefined),
+ *   encode: (Function|undefined),
+ *   resolution: (number|undefined),
+ *   tokenize: (string|undefined),
+ *   fastupdate: (boolean|undefined),
+ *   score: (function():number|undefined),
+ *   keystore: (number|undefined),
+ *   rtl: (boolean|undefined),
+ *   cache: (number|boolean|undefined),
+ *   resolve: (boolean|undefined),
+ *   db: (StorageInterface|undefined),
+ *   commit: (boolean|undefined),
+ *   worker: (string|undefined),
+ *   config: (string|undefined)
  * }}
  */
-export const IndexOptions = {};
+export let IndexOptions = {};
 
 /**
- * @typedef DocumentIndexOptions {{
- *   preset: string|undefined,
+ * @typedef {{
+ *   preset: (string|undefined),
  *   context: (IndexOptions|undefined),
- *   encoder: Encoder|Function|Object|undefined,
- *   encode: Function|undefined,
- *   resolution: [number=9],
- *   tokenize: [string="strict"],
- *   fastupdate: [boolean:false],
- *   score: Function]|undefined,
- *   keystore: [number=0],
- *   rtl: [boolean=false],
- *   cache: [number=null],
- *   db: StorageInterface|undefined,
- *   commit: boolean=true,
- *   config: string|undefined,
- *   field: string,
- *   filter: Function|undefined,
- *   custom: Function|undefined
+ *   encoder: (Encoder|Function|Object|undefined),
+ *   encode: (Function|undefined),
+ *   resolution: (number|undefined),
+ *   tokenize: (string|undefined),
+ *   fastupdate: (boolean|undefined),
+ *   score: (Function|undefined),
+ *   keystore: (number|undefined),
+ *   rtl: (boolean|undefined),
+ *   cache: (number|undefined),
+ *   db: (StorageInterface|undefined),
+ *   commit: (boolean|undefined),
+ *   config: (string|undefined),
+ *   field: (string|undefined),
+ *   filter: (Function|undefined),
+ *   custom: (Function|undefined)
  * }}
  */
-export const DocumentIndexOptions = {};
+export let FieldOptions = {};
 
 /**
- * @typedef DocumentOptions {{
+ * @typedef {{
  *   context: (IndexOptions|undefined),
- *   encoder: Encoder|Function|Object|undefined,
- *   encode: Function|undefined,
- *   resolution: [number=9],
- *   tokenize: [string="strict"],
- *   fastupdate: [boolean:false],
- *   score: Function]|undefined,
- *   keystore: [number=0],
- *   rtl: [boolean=false],
- *   cache: [number=null],
- *   db: StorageInterface|undefined,
- *   doc: DocumentDescriptor|Array<DocumentDescriptor>|undefined,
- *   document: DocumentDescriptor|Array<DocumentDescriptor>|undefined,
- *   worker: boolean|string|undefined
+ *   encoder: (Encoder|Function|Object|undefined),
+ *   encode: (Function|undefined),
+ *   resolution: (number|undefined),
+ *   tokenize: (string|undefined),
+ *   fastupdate: (boolean|undefined),
+ *   score: (Function|undefined),
+ *   keystore: (number|undefined),
+ *   rtl: (boolean|undefined),
+ *   cache: (number|boolean|undefined),
+ *   db: (StorageInterface|undefined),
+ *   doc: (DocumentDescriptor|Array<DocumentDescriptor>|undefined),
+ *   document: (DocumentDescriptor|Array<DocumentDescriptor>|undefined),
+ *   worker: (boolean|string|undefined),
  * }}
  */
-export const DocumentOptions = {};
+export let DocumentOptions = {};
 
 /**
- * @typedef ContextOptions {{
- *   depth: number,
- *   bidirectional: boolean|undefined,
- *   resolution: number|undefined
+ * @typedef {{
+ *   depth: (number|undefined),
+ *   bidirectional: (boolean|undefined),
+ *   resolution: (number|undefined),
  * }}
  */
-export const ContextOptions = {};
+export let ContextOptions = {};
 
 /**
- * @typedef DocumentDescriptor {{
- *   id: string="id",
- *   field: FieldOptions|Array<FieldOptions>|undefined,
- *   index: FieldOptions|Array<FieldOptions>|undefined,
- *   tag: TagOptions|Array<TagOptions>|undefined,
- *   store: StoreOptions|Array<StoreOptions>|undefined
+ * @typedef {{
+ *   id: (string|undefined),
+ *   field: (string|Array<string>|FieldOptions|Array<FieldOptions>|undefined),
+ *   index: (string|Array<string>|FieldOptions|Array<FieldOptions>|undefined),
+ *   tag: (string|Array<string>|TagOptions|Array<TagOptions>|undefined),
+ *   store: (string|Array<string>|StoreOptions|Array<StoreOptions>|boolean|undefined),
  * }}
  */
-export const DocumentDescriptor = {};
+export let DocumentDescriptor = {};
 
 /**
- * @typedef TagOptions {{
+ * @typedef {{
  *   field: string,
- *   tag: Object<string, string|Array<string>>|Array<string>|string,
- *   filter: Function|undefined,
- *   custom: Function|undefined,
- *   keystore: [number=0],
- *   db: StorageInterface|undefined,
- *   config: string|undefined
+ *   filter: ((function(string):boolean)|undefined),
+ *   custom: ((function(string):string)|undefined),
+ *   db: (StorageInterface|undefined),
  * }}
  */
-export const TagOptions = {};
+export let TagOptions = {};
 
 /**
- * @typedef StoreOptions {{
+ * @typedef {{
  *   field: string,
- *   filter: Function|undefined,
- *   custom: Function|undefined,
- *   config: string|undefined
+ *   filter: ((function(string):boolean)|undefined),
+ *   custom: ((function(string):string)|undefined)
  * }}
  */
-export const StoreOptions = {};
+export let StoreOptions = {};
 
 /**
- * @typedef SearchOptions {{
- *   query: string=,
- *   limit: [number=100],
- *   offset: [number=0],
- *   context: boolean|undefined,
- *   suggest: [boolean=false],
- *   resolve: [boolean=true],
- *   enrich: [boolean=false]
+ * @typedef {{
+ *   query: (string|undefined),
+ *   limit: (number|undefined),
+ *   offset: (number|undefined),
+ *   resolution: (number|undefined),
+ *   context: (boolean|undefined),
+ *   suggest: (boolean|undefined),
+ *   resolve: (boolean|undefined),
+ *   enrich: (boolean|undefined),
  * }}
  */
-export const SearchOptions = {};
-// tag: Array|undefined
+export let SearchOptions = {};
 
 /**
- * @typedef DocumentSearchOptions {{
- *   query: string=,
- *   limit: [number=100],
- *   offset: [number=0],
- *   context: boolean|undefined,
- *   suggest: [boolean=false],
- *   enrich: [boolean=false],
- *   tag: Object|Array<Object>|undefined,
- *   field: Array<DocumentSearchOptions>|undefined,
- *   index: Array<DocumentSearchOptions>|undefined,
- *   pluck: boolean|undefined,
- *   merge: [boolean=false],
- *   highlight: string|undefined
+ * @typedef {{
+ *   query: (string|undefined),
+ *   limit: (number|undefined),
+ *   offset: (number|undefined),
+ *   context: (boolean|undefined),
+ *   suggest: (boolean|undefined),
+ *   enrich: (boolean|undefined),
+ *   tag: (Object|Array<Object>|undefined),
+ *   field: (Array<string>|Array<DocumentSearchOptions>|string|undefined),
+ *   index: (Array<string>|Array<DocumentSearchOptions>|undefined),
+ *   pluck: (string|undefined),
+ *   merge: (boolean|undefined),
+ *   highlight: (string|undefined),
  * }}
  */
-export const DocumentSearchOptions = {};
+export let DocumentSearchOptions = {};
 
 /**
- * @typedef DocumentSearchResults Array<{{
- *   field: string|undefined,
- *   tag: string|undefined,
- *   result: Array<number|string>,
- *   highlight: string|undefined
- * }}>
+ * @typedef Array<number|string>
  */
-export const DocumentSearchResults = {};
+export let SearchResults = {};
 
 /**
- * @typedef EnrichedDocumentSearchResults Array<{{
- *   field: string|undefined,
- *   tag: string|undefined,
- *   result: Array<{{
- *      id: number|string,
- *      doc: Object
- *   }}>,
- *   highlight: string|undefined
- * }}>
+ * @typedef Array<{
+ *   id: (number|string),
+ *   res: number
+ * }>
  */
-export const EnrichedDocumentSearchResults = {};
+export let EnrichedSearchResults = {};
 
 /**
- * @typedef MergedDocumentSearchResults Array<{{
- *   id: number|string,
- *   doc: Object|undefined,
- *   field: Array<string>,
- *   highlight: string|undefined
- * }}>
+ * @typedef Array<{
+ *   field: (string|undefined),
+ *   tag: (string|undefined),
+ *   result: SearchResults
+ * }>
  */
-export const MergedDocumentSearchResults = {};
+export let DocumentSearchResults = {};
 
 /**
- * @typedef EncoderOptions {{
- *   rtl: boolean=false,
- *   dedupe: boolean=true,
- *   split: string|undefined,
- *   include: EncoderSplitOptions|undefined,
- *   exclude: EncoderSplitOptions|undefined,
- *   prepare: function(string):string|undefined,
- *   finalize: function(Array<>string>):Array<string>|undefined,
- *   filter: Set|undefined,
- *   matcher: Map|undefined,
- *   mapper: Map|undefined,
- *   stemmer: Map|undefined,
- *   replacer: Array<string|RegExp>|undefined,
- *   minlength: number=1,
- *   maxlength: number|undefined,
- *   cache: boolean=true,
+ * @typedef Array<{
+ *   field: (string|undefined),
+ *   tag: (string|undefined),
+ *   highlight: (string|undefined),
+ *   result: Array<{
+ *      id: (number|string),
+ *      doc: (Object|null)
+ *   }>
+ * }>
+ */
+export let EnrichedDocumentSearchResults = {};
+
+/**
+ * @typedef Array<{
+ *   id: (number|string),
+ *   doc: (Object|null),
+ *   field: (Array<string>|undefined),
+ *   tag: (Array<string>|undefined)
+ * }>
+ */
+export let MergedDocumentSearchResults = {};
+
+/**
+ * @typedef {{
+ *   letter: (boolean|undefined),
+ *   number: (boolean|undefined),
+ *   symbol: (boolean|undefined),
+ *   punctuation: (boolean|undefined),
+ *   control: (boolean|undefined),
+ *   char: (string|Array<string>|undefined)
  * }}
  */
-export const EncoderOptions = {};
+export let EncoderSplitOptions = {};
 
 /**
- * @typedef EncoderSplitOptions {{
- *   letter: boolean=false,
- *   number: boolean=false,
- *   symbol: boolean=false,
- *   punctuation: boolean=false,
- *   control: boolean=false,
- *   char: string|Array<string>|undefined,
+ * @typedef {{
+ *   rtl: (boolean|undefined),
+ *   dedupe: (boolean|undefined),
+ *   include: (EncoderSplitOptions|undefined),
+ *   exclude: (EncoderSplitOptions|undefined),
+ *   split: (string|boolean|undefined),
+ *   normalize: (boolean|(function(string):string)|undefined),
+ *   prepare: ((function(string):string)|undefined),
+ *   finalize: ((function(Array<string>):(Array<string>|void))|undefined),
+ *   filter: (Set<string>|undefined),
+ *   matcher: (Map<string, string>|undefined),
+ *   mapper: (Map<string, string>|undefined),
+ *   stemmer: (Map<string, string>|undefined),
+ *   replacer: (Array<string|RegExp, string>|undefined),
+ *   minlength: (number|undefined),
+ *   maxlength: (number|undefined),
+ *   cache: (boolean|undefined)
  * }}
  */
-export const EncoderSplitOptions = {};
+export let EncoderOptions = {};
 
 /**
- * @typedef PersistentOptions {{
- *   name: string="flexsearch",
- *   field: string|undefined,
- *   type: string|undefined,
- *   db: *|undefined
+ * @typedef {{
+ *   name: (string|undefined),
+ *   field: (string|undefined),
+ *   type: (string|undefined),
+ *   db: (StorageInterface|undefined)
  * }}
  */
-export const PersistentOptions = {};
+export let PersistentOptions = {};
 
 /**
- * @typedef ResolverOptions {{
- *   index: Index|undefined,
- *   query: string,
- *   limit: [number=0],
- *   offset: [number=0],
- *   enrich: boolean=false,
- *   resolve: boolean=false,
- *   suggest: boolean=false
+ * @typedef {{
+ *   index: (Index|undefined),
+ *   query: (string|undefined),
+ *   limit: (number|undefined),
+ *   offset: (number|undefined),
+ *   enrich: (boolean|undefined),
+ *   resolve: (boolean|undefined),
+ *   suggest: (boolean|undefined),
+ *   and: (ResolverOptions|Array<ResolverOptions>|undefined),
+ *   or: (ResolverOptions|Array<ResolverOptions>|undefined),
+ *   xor: (ResolverOptions|Array<ResolverOptions>|undefined),
+ *   not: (ResolverOptions|Array<ResolverOptions>|undefined)
  * }}
  */
-export const ResolverOptions = {};
\ No newline at end of file
+export let ResolverOptions = {};
diff --git a/src/worker.js b/src/worker.js
index 4b160f8..860ad87 100644
--- a/src/worker.js
+++ b/src/worker.js
@@ -9,7 +9,7 @@ let pid = 0;
  * @constructor
  */
 
-export default function WorkerIndex(options = {}){
+export default function WorkerIndex(options = /** @type IndexOptions */ ({})){
 
     if(!this || this.constructor !== WorkerIndex) {
         return new WorkerIndex(options);
diff --git a/src/worker/handler.js b/src/worker/handler.js
index da2922b..37747c0 100644
--- a/src/worker/handler.js
+++ b/src/worker/handler.js
@@ -14,11 +14,11 @@ export default async function(data) {
 
         case "init":
 
-            /** @type IndexOptions */
+            /** @type {IndexOptions} */
             let options = data["options"] || {};
             let filepath = options.config;
             if(filepath){
-                options = filepath;
+                options = options;
                 // will be replaced after build with the line below because
                 // there is an issue with closure compiler dynamic import
                 options = (await import(filepath))["default"];
diff --git a/task/build.js b/task/build.js
index a72fac4..a4a2b2d 100644
--- a/task/build.js
+++ b/task/build.js
@@ -101,7 +101,7 @@ let parameter = (function(opt){
     module_resolution: "BROWSER",
     //dependency_mode: "SORT_ONLY",
     //js_module_root: "./",
-    entry_point: release === "lang" ? "./tmp/lang.js" : "./tmp/webpack.js",
+    entry_point: release === "lang" ? "./tmp/lang.js" : "./tmp/bundle.js",
     //manage_closure_dependencies: true,
     dependency_mode: "PRUNE", // PRUNE_LEGACY
     rewrite_polyfills: use_polyfill || false,
@@ -250,7 +250,7 @@ else (async function(){
     //     "resolver.js",
     //     "serialize.js",
     //     "type.js",
-    //     "webpack.js"
+    //     "bundle.js"
     // ];
 
     files.forEach(function(file){
@@ -372,6 +372,7 @@ else (async function(){
             part = part.split(",");
             part = part.map(entry => "export const " + entry.replace(":", "="));
             part = part.join(";") + ";";
+
             // part = "export const Index=FlexSearch.Index;" +
             //        "export const Charset=FlexSearch.Charset;" +
             //        "export const Encoder=FlexSearch.Encoder;" +
@@ -407,7 +408,6 @@ else (async function(){
         // replace the eval wrapper
         build = build.replace(/\(0,eval\)\('([^']+)'\)/g, "$1");
 
-
         fs.writeFileSync(filename, build);
         fs.existsSync("dist/node/") || fs.mkdirSync("dist/node/");
         fs.copyFileSync("src/worker/node.js", "dist/node/node.js");