diff --git a/dist/flexsearch.bundle.debug.js b/dist/flexsearch.bundle.debug.js
index 1d99cb2..2e0fdab 100644
--- a/dist/flexsearch.bundle.debug.js
+++ b/dist/flexsearch.bundle.debug.js
@@ -1,5 +1,5 @@
 /**!
- * FlexSearch.js v0.8.155 (Bundle/Debug)
+ * FlexSearch.js v0.8.156 (Bundle/Debug)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
@@ -50,17 +50,17 @@ function A() {
 function D(a) {
   return "string" === typeof a;
 }
-function G(a) {
+function aa(a) {
   return "object" === typeof a;
 }
-function aa(a) {
+function ba(a) {
   const c = [];
   for (const b of a.keys()) {
     c.push(b);
   }
   return c;
 }
-function ba(a, c) {
+function ca(a, c) {
   if (D(c)) {
     a = a[c];
   } else {
@@ -70,17 +70,17 @@ function ba(a, c) {
   }
   return a;
 }
-function ca(a) {
+function da(a) {
   let c = 0;
   for (let b = 0, e; b < a.length; b++) {
     (e = a[b]) && c < e.length && (c = e.length);
   }
   return c;
 }
-;const da = /[^\p{L}\p{N}]+/u, ea = /(\d{3})/g, fa = /(\D)(\d{3})/g, ha = /(\d{3})(\D)/g, ia = /[\u0300-\u036f]/g;
-function ja(a = {}) {
-  if (!this || this.constructor !== ja) {
-    return new ja(...arguments);
+;const ea = /[^\p{L}\p{N}]+/u, fa = /(\d{3})/g, ha = /(\D)(\d{3})/g, ia = /(\d{3})(\D)/g, ja = /[\u0300-\u036f]/g;
+function G(a = {}) {
+  if (!this || this.constructor !== G) {
+    return new G(...arguments);
   }
   if (arguments.length) {
     for (a = 0; a < arguments.length; a++) {
@@ -90,7 +90,7 @@ function ja(a = {}) {
     this.assign(a);
   }
 }
-t = ja.prototype;
+t = G.prototype;
 t.assign = function(a) {
   this.normalize = z(a.normalize, !0, this.normalize);
   let c = a.include, b = c || a.exclude || a.split, e;
@@ -118,7 +118,7 @@ t.assign = function(a) {
     this.numeric = z(a.numeric, e);
   } else {
     try {
-      this.split = z(this.split, da);
+      this.split = z(this.split, ea);
     } catch (d) {
       console.warn("This platform does not support unicode regex. It falls back to using simple whitespace splitter instead: /s+/."), this.split = /\s+/;
     }
@@ -213,9 +213,9 @@ t.encode = function(a) {
       this.H = setTimeout(H, 50, this);
     }
   }
-  this.normalize && ("function" === typeof this.normalize ? a = this.normalize(a) : a = ia ? a.normalize("NFKD").replace(ia, "").toLowerCase() : a.toLowerCase());
+  this.normalize && ("function" === typeof this.normalize ? a = this.normalize(a) : a = ja ? a.normalize("NFKD").replace(ja, "").toLowerCase() : a.toLowerCase());
   this.prepare && (a = this.prepare(a));
-  this.numeric && 3 < a.length && (a = a.replace(fa, "$1 $2").replace(ha, "$1 $2").replace(ea, "$1 "));
+  this.numeric && 3 < a.length && (a = a.replace(ha, "$1 $2").replace(ia, "$1 $2").replace(fa, "$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;
   for (let f = 0, g, h; f < e.length; f++) {
@@ -661,7 +661,7 @@ function Ba(a) {
   return b;
 }
 ;U.prototype.add = function(a, c, b) {
-  G(a) && (c = a, a = ba(c, this.key));
+  aa(a) && (c = a, a = ca(c, this.key));
   if (c && (a || 0 === a)) {
     if (!b && this.reg.has(a)) {
       return this.update(a, c);
@@ -693,7 +693,7 @@ function Ba(a) {
             continue;
           }
           f.constructor === String && (f = "" + f);
-          f = ba(c, f);
+          f = ca(c, f);
         }
         if (d && f) {
           D(f) && (f = [f]);
@@ -1032,7 +1032,7 @@ function La(a, c, b, e, d, f, g) {
     if (this.result.length && a.unshift(this.result), 2 > a.length) {
       this.result = a[0];
     } else {
-      if (c = ca(a)) {
+      if (c = da(a)) {
         return this.result = Fa(a, c, b, e, g, this.h, f), f ? d ? V.call(this.index, this.result) : this.result : this;
       }
       this.result = [];
@@ -1214,7 +1214,7 @@ W.prototype.resolve = function(a, c, b) {
 };
 A();
 U.prototype.search = function(a, c, b, e) {
-  b || (!c && G(a) ? (b = a, a = "") : G(c) && (b = c, c = 0));
+  b || (!c && aa(a) ? (b = a, a = "") : aa(c) && (b = c, c = 0));
   let d = [];
   var f = [];
   let g;
@@ -1439,7 +1439,7 @@ function Ra(a, c, b, e, d) {
     h = m.tokenize;
     l !== f && (f = l, g = f.encode(a));
     for (let r = 0; r < p.length; r++) {
-      let q = "", u = ba(p[r].doc, n).split(/\s+/);
+      let q = "", u = ca(p[r].doc, n).split(/\s+/);
       for (let v = 0, w, x; v < u.length; v++) {
         w = u[v];
         x = l.encode(w);
@@ -1524,7 +1524,7 @@ function V(a) {
   this.store = b && (e ? new S(e) : new Map());
   this.cache = (b = a.cache || null) && new X(b);
   a.cache = !1;
-  this.worker = a.worker;
+  this.worker = a.worker || !1;
   this.priority = a.priority || 4;
   this.index = Ua.call(this, a, c);
   this.tag = null;
@@ -1547,19 +1547,29 @@ function V(a) {
   }
   if (this.worker) {
     this.fastupdate = !1;
-    a = [];
-    for (const d of this.index.values()) {
-      d.then && a.push(d);
+    const d = [];
+    for (const f of this.index.values()) {
+      f.then && d.push(f);
     }
-    if (a.length) {
-      const d = this;
-      return Promise.all(a).then(function(f) {
-        let g = 0;
-        for (const h of d.index.entries()) {
-          const k = h[0];
-          h[1].then && d.index.set(k, f[g++]);
+    if (d.length) {
+      const f = this;
+      return Promise.all(d).then(function(g) {
+        const h = new Map();
+        let k = 0;
+        for (const m of f.index.entries()) {
+          const n = m[0];
+          var l = m[1];
+          if (l.then) {
+            l = d[k].encoder || {};
+            let p = h.get(l);
+            p || (p = l.encode ? l : new G(l), h.set(l, p));
+            l = g[k];
+            l.encoder = p;
+            f.index.set(n, l);
+            k++;
+          }
         }
-        return d;
+        return f;
       });
     }
   } else {
@@ -1573,28 +1583,30 @@ t.mount = function(a) {
   }
   let c = this.field;
   if (this.tag) {
-    for (let d = 0, f; d < this.R.length; d++) {
-      f = this.R[d];
+    for (let f = 0, g; f < this.R.length; f++) {
+      g = this.R[f];
       var b = void 0;
-      this.index.set(f, b = new N({}, this.reg));
+      this.index.set(g, b = new N({}, this.reg));
       c === this.field && (c = c.slice(0));
-      c.push(f);
-      b.tag = this.tag.get(f);
+      c.push(g);
+      b.tag = this.tag.get(g);
     }
   }
   b = [];
   const e = {db:a.db, type:a.type, fastupdate:a.fastupdate};
-  for (let d = 0, f, g; d < c.length; d++) {
-    e.field = g = c[d];
-    f = this.index.get(g);
-    const h = new a.constructor(a.id, e);
-    h.id = a.id;
-    b[d] = h.mount(f);
-    f.document = !0;
-    d ? f.bypass = !0 : f.store = this.store;
+  for (let f = 0, g, h; f < c.length; f++) {
+    e.field = h = c[f];
+    g = this.index.get(h);
+    const k = new a.constructor(a.id, e);
+    k.id = a.id;
+    b[f] = k.mount(g);
+    g.document = !0;
+    f ? g.bypass = !0 : g.store = this.store;
   }
-  this.db = !0;
-  return Promise.all(b);
+  const d = this;
+  return this.db = Promise.all(b).then(function() {
+    d.db = !0;
+  });
 };
 t.commit = async function(a, c) {
   const b = [];
@@ -1618,9 +1630,10 @@ function Ua(a, c) {
   for (let d = 0, f, g; d < e.length; d++) {
     f = e[d];
     D(f) || (g = f, f = f.field);
-    g = G(g) ? Object.assign({}, a, g) : a;
+    g = aa(g) ? Object.assign({}, a, g) : a;
     if (this.worker) {
       const h = new P(g);
+      h.encoder = g.encoder;
       b.set(f, h);
     }
     this.worker || b.set(f, new N(g, this.reg));
@@ -1652,7 +1665,7 @@ t.update = function(a, c) {
   return this.remove(a).add(a, c);
 };
 t.remove = function(a) {
-  G(a) && (a = ba(a, this.key));
+  aa(a) && (a = ca(a, this.key));
   for (var c of this.index.values()) {
     c.remove(a, !0);
   }
@@ -1702,7 +1715,7 @@ t.get = function(a) {
   }) : this.store.get(a) || null;
 };
 t.set = function(a, c) {
-  "object" === typeof a && (c = a, a = ba(c, this.key));
+  "object" === typeof a && (c = a, a = ca(c, this.key));
   this.store.set(a, c);
   return this;
 };
@@ -2077,7 +2090,7 @@ function ib(a, c, b, e, d, f, g, h) {
   }
   b = a.context;
   const e = !0 === b ? {depth:1} : b || {}, d = D(a.encoder) ? bb[a.encoder] : a.encode || a.encoder || {};
-  this.encoder = d.encode ? d : "object" === typeof d ? new ja(d) : {encode:d};
+  this.encoder = d.encode ? d : "object" === typeof d ? new G(d) : {encode:d};
   this.resolution = a.resolution || 9;
   this.tokenize = b = (b = a.tokenize) && "default" !== b && "exact" !== b && b || "strict";
   this.depth = "strict" === b && e.depth || 0;
@@ -2210,7 +2223,7 @@ t.serialize = function(a = !0) {
 la(N.prototype);
 const lb = "undefined" !== typeof window && (window.indexedDB || window.mozIndexedDB || window.webkitIndexedDB || window.msIndexedDB), mb = ["map", "ctx", "tag", "reg", "cfg"], Y = A();
 function nb(a, c = {}) {
-  if (!this) {
+  if (!this || this.constructor !== nb) {
     return new nb(a, c);
   }
   "object" === typeof a && (c = a, a = a.name);
@@ -2224,7 +2237,7 @@ function nb(a, c = {}) {
 }
 t = nb.prototype;
 t.mount = function(a) {
-  if (!a.encoder) {
+  if (a.index) {
     return a.mount(this);
   }
   a.db = this;
@@ -2376,7 +2389,7 @@ t.commit = async function(a, c, b) {
         e[d] = f.del;
       }
     }
-    c || (b || (e = e.concat(aa(a.reg))), e.length && await this.remove(e));
+    c || (b || (e = e.concat(ba(a.reg))), e.length && await this.remove(e));
   }
   a.reg.size && (await this.transaction("map", "readwrite", function(e) {
     for (const d of a.map) {
@@ -2511,7 +2524,7 @@ function Z(a, c) {
     a = null;
   });
 }
-;const pb = {Index:N, Charset:bb, Encoder:ja, Document:U, Worker:P, Resolver:W, IndexedDB:nb, Language:{}}, qb = "undefined" !== typeof self ? self : "undefined" !== typeof global ? global : self;
+;const pb = {Index:N, Charset:bb, Encoder:G, Document:U, Worker:P, Resolver:W, IndexedDB:nb, Language:{}}, qb = "undefined" !== typeof self ? self : "undefined" !== typeof global ? global : self;
 let sb;
 (sb = qb.define) && sb.amd ? sb([], function() {
   return pb;
diff --git a/dist/flexsearch.bundle.min.js b/dist/flexsearch.bundle.min.js
index cc0af81..634a2b5 100644
--- a/dist/flexsearch.bundle.min.js
+++ b/dist/flexsearch.bundle.min.js
@@ -1,19 +1,19 @@
 /**!
- * FlexSearch.js v0.8.155 (Bundle)
+ * FlexSearch.js v0.8.156 (Bundle)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * 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 t;function z(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 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"===d?b:a}function A(){return Object.create(null)}function D(a){return"string"===typeof a}
-function G(a){return"object"===typeof a}function aa(a){const b=[];for(const c of a.keys())b.push(c);return b}function H(a,b){if(D(b))a=a[b];else for(let c=0;a&&c<b.length;c++)a=a[b[c]];return a}function ba(a){let b=0;for(let c=0,e;c<a.length;c++)(e=a[c])&&b<e.length&&(b=e.length);return b};const ca=/[^\p{L}\p{N}]+/u,da=/(\d{3})/g,ea=/(\D)(\d{3})/g,fa=/(\d{3})(\D)/g,ha=/[\u0300-\u036f]/g;function ia(a={}){if(!this||this.constructor!==ia)return new ia(...arguments);if(arguments.length)for(a=0;a<arguments.length;a++)this.assign(arguments[a]);else this.assign(a)}t=ia.prototype;
+function G(a){return"object"===typeof a}function aa(a){const b=[];for(const c of a.keys())b.push(c);return b}function ba(a,b){if(D(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,e;c<a.length;c++)(e=a[c])&&b<e.length&&(b=e.length);return b};const da=/[^\p{L}\p{N}]+/u,ea=/(\d{3})/g,fa=/(\D)(\d{3})/g,ha=/(\d{3})(\D)/g,ia=/[\u0300-\u036f]/g;function H(a={}){if(!this||this.constructor!==H)return new H(...arguments);if(arguments.length)for(a=0;a<arguments.length;a++)this.assign(arguments[a]);else this.assign(a)}t=H.prototype;
 t.assign=function(a){this.normalize=z(a.normalize,!0,this.normalize);let b=a.include,c=b||a.exclude||a.split,e;if(c||""===c){if("object"===typeof c&&c.constructor!==RegExp){let d="";e=!b;b||(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(f){this.split=/\s+/}}else this.split=c,e=!1===c||2>"a1a".split(c).length;
-this.numeric=z(a.numeric,e)}else{try{this.split=z(this.split,ca)}catch(d){this.split=/\s+/}this.numeric=z(a.numeric,z(this.numeric,!0))}this.prepare=z(a.prepare,null,this.prepare);this.finalize=z(a.finalize,null,this.finalize);c=a.filter;this.filter="function"===typeof c?c:z(c&&new Set(c),null,this.filter);this.dedupe=z(a.dedupe,!0,this.dedupe);this.matcher=z((c=a.matcher)&&new Map(c),null,this.matcher);this.mapper=z((c=a.mapper)&&new Map(c),null,this.mapper);this.stemmer=z((c=a.stemmer)&&new Map(c),
+this.numeric=z(a.numeric,e)}else{try{this.split=z(this.split,da)}catch(d){this.split=/\s+/}this.numeric=z(a.numeric,z(this.numeric,!0))}this.prepare=z(a.prepare,null,this.prepare);this.finalize=z(a.finalize,null,this.finalize);c=a.filter;this.filter="function"===typeof c?c:z(c&&new Set(c),null,this.filter);this.dedupe=z(a.dedupe,!0,this.dedupe);this.matcher=z((c=a.matcher)&&new Map(c),null,this.matcher);this.mapper=z((c=a.mapper)&&new Map(c),null,this.mapper);this.stemmer=z((c=a.stemmer)&&new Map(c),
 null,this.stemmer);this.replacer=z(a.replacer,null,this.replacer);this.minlength=z(a.minlength,1,this.minlength);this.maxlength=z(a.maxlength,1024,this.maxlength);this.rtl=z(a.rtl,!1,this.rtl);if(this.cache=c=z(a.cache,!0,this.cache))this.H=null,this.S="number"===typeof c?c:2E5,this.B=new Map,this.G=new Map,this.L=this.K=128;this.h="";this.M=null;this.A="";this.N=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};t.addStemmer=function(a,b){this.stemmer||(this.stemmer=new Map);this.stemmer.set(a,b);this.A+=(this.A?"|":"")+a;this.N=null;this.cache&&I(this);return this};t.addFilter=function(a){"function"===typeof a?this.filter=a:(this.filter||(this.filter=new Set),this.filter.add(a));this.cache&&I(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&&I(this);return this};t.addMatcher=function(a,b){if("object"===typeof a)return this.addReplacer(a,b);if(2>a.length&&(this.dedupe||this.mapper))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&&I(this);return this};
 t.addReplacer=function(a,b){if("string"===typeof a)return this.addMatcher(a,b);this.replacer||(this.replacer=[]);this.replacer.push(a,b);this.cache&&I(this);return this};
-t.encode=function(a){if(this.cache&&a.length<=this.K)if(this.H){if(this.B.has(a))return this.B.get(a)}else this.H=setTimeout(I,50,this);this.normalize&&("function"===typeof this.normalize?a=this.normalize(a):a=ha?a.normalize("NFKD").replace(ha,"").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 b=!(this.dedupe||this.mapper||this.filter||this.matcher||this.stemmer||this.replacer);let c=
+t.encode=function(a){if(this.cache&&a.length<=this.K)if(this.H){if(this.B.has(a))return this.B.get(a)}else this.H=setTimeout(I,50,this);this.normalize&&("function"===typeof this.normalize?a=this.normalize(a):a=ia?a.normalize("NFKD").replace(ia,"").toLowerCase():a.toLowerCase());this.prepare&&(a=this.prepare(a));this.numeric&&3<a.length&&(a=a.replace(fa,"$1 $2").replace(ha,"$1 $2").replace(ea,"$1 "));const b=!(this.dedupe||this.mapper||this.filter||this.matcher||this.stemmer||this.replacer);let c=
 [],e=this.split||""===this.split?a.split(this.split):a;for(let f=0,g,h;f<e.length;f++)if((g=h=e[f])&&!(g.length<this.minlength||g.length>this.maxlength))if(b)c.push(g);else if(!this.filter||("function"===typeof this.filter?this.filter(g):!this.filter.has(g))){if(this.cache&&g.length<=this.L)if(this.H){var d=this.G.get(g);if(d||""===d){d&&c.push(d);continue}}else this.H=setTimeout(I,50,this);this.stemmer&&2<g.length&&(this.N||(this.N=new RegExp("(?!^)("+this.A+")$")),g=g.replace(this.N,k=>this.stemmer.get(k)));
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+function Qa(a,b,c,e,d){a=this.tag.get(a);if(!a)return[];if((b=(a=a&&a.get(b))&&a.length-e)&&0<b){if(b>c||e)a=a.slice(e,e+c);d&&(a=V.call(this,a));return a}}function V(a){if(!this||!this.store)return 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 b};function U(a){if(!this||this.constructor!==U)return new U(a);const b=a.document||a.doc||a;let c,e;this.F=[];this.field=[];this.J=[];this.key=(c=b.key||b.id)&&Ta(c,this.J)||"id";(e=a.keystore||0)&&(this.keystore=e);this.fastupdate=!!a.fastupdate;this.reg=!this.fastupdate||a.worker||a.db?e?new T(e):new Set:e?new S(e):new Map;this.C=(c=b.store||null)&&c&&!0!==c&&[];this.store=c&&(e?new S(e):new Map);this.cache=(c=a.cache||null)&&new X(c);a.cache=!1;this.worker=a.worker||!1;this.priority=a.priority||
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+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||null}):this.store.get(a)||null};t.set=function(a,b){"object"===typeof a&&(b=a,a=ba(b,this.key));this.store.set(a,b);return this};t.searchCache=Va;
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@@ -72,14 +72,14 @@ function gb(a,b,c,e,d,f,g){let h=g?a.ctx:a.map,k;if(!b[c]||g&&!(k=b[c])[g])if(g?
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+function jb(a,b,c,e){let d=[];if(a&&a.length){if(a.length<=e){b.push(a);return}for(let f=0,g;f<e;f++)if(g=a[f])d[f]=g;if(d.length){b.push(d);return}}if(!c)return d}function ib(a,b,c,e,d,f,g,h){let k;c&&(k=a.bidirectional&&b>c)&&(k=c,c=b,b=k);if(a.db)return a.db.get(b,c,e,d,f,g,h);a=c?(a=a.ctx.get(c))&&a.get(b):a.map.get(b);return a};function M(a,b){if(!this||this.constructor!==M)return new M(a);if(a){var c=D(a)?a:a.preset;c&&(a=Object.assign({},eb[c],a))}else a={};c=a.context;const e=!0===c?{depth:1}:c||{},d=D(a.encoder)?bb[a.encoder]:a.encode||a.encoder||{};this.encoder=d.encode?d:"object"===typeof d?new H(d):{encode:d};this.resolution=a.resolution||9;this.tokenize=c=(c=a.tokenize)&&"default"!==c&&"exact"!==c&&c||"strict";this.depth="strict"===c&&e.depth||0;this.bidirectional=!1!==e.bidirectional;this.fastupdate=!!a.fastupdate;
 this.score=a.score||null;(c=a.keystore||0)&&(this.keystore=c);this.map=c?new S(c):new Map;this.ctx=c?new S(c):new Map;this.reg=b||(this.fastupdate?c?new S(c):new Map:c?new T(c):new Set);this.U=e.resolution||3;this.rtl=d.rtl||a.rtl||!1;this.cache=(c=a.cache||null)&&new X(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;this.priority=a.priority||4}t=M.prototype;
 t.mount=function(a){this.commit_timer&&(clearTimeout(this.commit_timer),this.commit_timer=null);return a.mount(this)};t.commit=function(a,b){this.commit_timer&&(clearTimeout(this.commit_timer),this.commit_timer=null);return this.db.commit(this,a,b)};t.destroy=function(){this.commit_timer&&(clearTimeout(this.commit_timer),this.commit_timer=null);return this.db.destroy()};function db(a){a.commit_timer||(a.commit_timer=setTimeout(function(){a.commit_timer=null;a.db.commit(a,void 0,void 0)},1))}
 t.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};t.append=function(a,b){return this.add(a,b,!0)};t.contain=function(a){return this.db?this.db.has(a):this.reg.has(a)};t.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)};
 t.cleanup=function(){if(!this.fastupdate)return this;cb(this.map);this.depth&&cb(this.ctx);return this};t.searchCache=Va;t.export=function(a,b,c=0,e=0){let d,f;switch(e){case 0:d="reg";f=wa(this.reg);break;case 1:d="cfg";f=null;break;case 2:d="map";f=sa(this.map,this.reg.size);break;case 3:d="ctx";f=ua(this.ctx,this.reg.size);break;default:return}return ya.call(this,a,b,d,f,c,e)};
 t.import=function(a,b){if(b)switch("string"===typeof b&&(b=JSON.parse(b)),a=a.split("."),"json"===a[a.length-1]&&a.pop(),3===a.length&&a.shift(),a=1<a.length?a[1]:a[0],a){case "reg":this.fastupdate=!1;this.reg=xa(b,this.reg);break;case "map":this.map=ta(b,this.map);break;case "ctx":this.ctx=va(b,this.ctx)}};
 t.serialize=function(a=!0){let b="",c="",e="";if(this.reg.size){let f;for(var d of this.reg.keys())f||(f=typeof d),b+=(b?",":"")+("string"===f?'"'+d+'"':d);b="index.reg=new Set(["+b+"]);";c=za(this.map,f);c="index.map=new Map(["+c+"]);";for(const g of this.ctx.entries()){d=g[0];let h=za(g[1],f);h="new Map(["+h+"])";h='["'+d+'",'+h+"]";e+=(e?",":"")+h}e="index.ctx=new Map(["+e+"]);"}return a?"function inject(index){"+b+c+e+"}":b+c+e};la(M.prototype);const lb="undefined"!==typeof window&&(window.indexedDB||window.mozIndexedDB||window.webkitIndexedDB||window.msIndexedDB),mb=["map","ctx","tag","reg","cfg"],Y=A();
-function nb(a,b={}){if(!this)return new nb(a,b);"object"===typeof a&&(b=a,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.type=b.type;this.fastupdate=this.support_tag_search=!1;this.db=null;this.h={}}t=nb.prototype;t.mount=function(a){if(!a.encoder)return a.mount(this);a.db=this;return this.open()};
+function nb(a,b={}){if(!this||this.constructor!==nb)return new nb(a,b);"object"===typeof a&&(b=a,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.type=b.type;this.fastupdate=this.support_tag_search=!1;this.db=null;this.h={}}t=nb.prototype;t.mount=function(a){if(a.index)return a.mount(this);a.db=this;return this.open()};
 t.open=function(){if(this.db)return this.db;let a=this;navigator.storage&&navigator.storage.persist();Y[a.id]||(Y[a.id]=[]);Y[a.id].push(a.field);const b=lb.open(a.id,1);b.onupgradeneeded=function(){const c=a.db=this.result;for(let e=0,d;e<mb.length;e++){d=mb[e];for(let f=0,g;f<Y[a.id].length;f++)g=Y[a.id][f],c.objectStoreNames.contains(d+("reg"!==d?g?":"+g:"":""))||c.createObjectStore(d+("reg"!==d?g?":"+g:"":""))}};return a.db=Z(b,function(c){a.db=c;a.db.onversionchange=function(){a.close()}})};
 t.close=function(){this.db&&this.db.close();this.db=null};t.destroy=function(){const a=lb.deleteDatabase(this.id);return Z(a)};t.clear=function(){const a=[];for(let c=0,e;c<mb.length;c++){e=mb[c];for(let d=0,f;d<Y[this.id].length;d++)f=Y[this.id][d],a.push(e+("reg"!==e?f?":"+f:"":""))}const b=this.db.transaction(a,"readwrite");for(let c=0;c<a.length;c++)b.objectStore(a[c]).clear();return Z(b)};
 t.get=function(a,b,c=0,e=0,d=!0,f=!1){a=this.db.transaction((b?"ctx":"map")+(this.field?":"+this.field:""),"readonly").objectStore((b?"ctx":"map")+(this.field?":"+this.field:"")).get(b?b+":"+a:a);const g=this;return Z(a).then(function(h){let k=[];if(!h||!h.length)return k;if(d){if(!c&&!e&&1===h.length)return h[0];for(let l=0,m;l<h.length;l++)if((m=h[l])&&m.length){if(e>=m.length){e-=m.length;continue}const n=c?e+Math.min(m.length-e,c):m.length;for(let p=e;p<n;p++)k.push(m[p]);e=0;if(k.length===c)break}return f?
@@ -91,4 +91,4 @@ for(let m=0,n,p;m<l;m++)if((p=g[m])&&p.length){if((n=h[m])&&n.length)for(k=0;k<p
 0;n<u.length;n++)q.push(u[n]);else m[r]=u;n=1}}else m=l,n=1;n&&e.put(m,f+":"+k)})}}}),a.store?await this.transaction("reg","readwrite",function(e){for(const d of a.store){const f=d[0],g=d[1];e.put("object"===typeof g?JSON.stringify(g):1,f)}}):a.bypass||await this.transaction("reg","readwrite",function(e){for(const d of a.reg.keys())e.put(1,d)}),a.tag&&await this.transaction("tag","readwrite",function(e){for(const d of a.tag){const f=d[0],g=d[1];g.length&&(e.get(f).onsuccess=function(){let h=this.result;
 h=h&&h.length?h.concat(g):g;e.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 ob(a,b,c){const e=a.value;let d,f=0;for(let g=0,h;g<e.length;g++){if(h=c?e:e[g]){for(let k=0,l,m;k<b.length;k++)if(m=b[k],l=h.indexOf(m),0<=l)if(d=1,1<h.length)h.splice(l,1);else{e[g]=[];break}f+=h.length}if(c)break}f?d&&a.update(e):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(){const c=this.result;c&&ob(c,a)}}),this.transaction("ctx","readwrite",function(b){b.openCursor().onsuccess=function(){const c=this.result;c&&ob(c,a)}}),this.transaction("tag","readwrite",function(b){b.openCursor().onsuccess=function(){const c=this.result;c&&ob(c,a,!0)}}),this.transaction("reg","readwrite",function(b){for(let c=0;c<a.length;c++)b.delete(a[c])})])};
-function Z(a,b){return new Promise((c,e)=>{a.onsuccess=a.oncomplete=function(){b&&b(this.result);b=null;c(this.result)};a.onerror=a.onblocked=e;a=null})};const pb={Index:M,Charset:bb,Encoder:ia,Document:U,Worker:P,Resolver:W,IndexedDB:nb,Language:{}},rb="undefined"!==typeof self?self:"undefined"!==typeof global?global:self;let sb;(sb=rb.define)&&sb.amd?sb([],function(){return pb}):"object"===typeof rb.exports?rb.exports=pb:rb.FlexSearch=pb;}(this||self));
+function Z(a,b){return new Promise((c,e)=>{a.onsuccess=a.oncomplete=function(){b&&b(this.result);b=null;c(this.result)};a.onerror=a.onblocked=e;a=null})};const pb={Index:M,Charset:bb,Encoder:H,Document:U,Worker:P,Resolver:W,IndexedDB:nb,Language:{}},rb="undefined"!==typeof self?self:"undefined"!==typeof global?global:self;let sb;(sb=rb.define)&&sb.amd?sb([],function(){return pb}):"object"===typeof rb.exports?rb.exports=pb:rb.FlexSearch=pb;}(this||self));
diff --git a/dist/flexsearch.bundle.module.debug.js b/dist/flexsearch.bundle.module.debug.js
index 1582ae8..fe1f0cd 100644
--- a/dist/flexsearch.bundle.module.debug.js
+++ b/dist/flexsearch.bundle.module.debug.js
@@ -1,5 +1,5 @@
 /**!
- * FlexSearch.js v0.8.155 (Bundle/Module/Debug)
+ * FlexSearch.js v0.8.156 (Bundle/Module/Debug)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
@@ -49,17 +49,17 @@ function A() {
 function D(a) {
   return "string" === typeof a;
 }
-function G(a) {
+function aa(a) {
   return "object" === typeof a;
 }
-function aa(a) {
+function ba(a) {
   const c = [];
   for (const b of a.keys()) {
     c.push(b);
   }
   return c;
 }
-function ba(a, c) {
+function ca(a, c) {
   if (D(c)) {
     a = a[c];
   } else {
@@ -69,17 +69,17 @@ function ba(a, c) {
   }
   return a;
 }
-function ca(a) {
+function da(a) {
   let c = 0;
   for (let b = 0, e; b < a.length; b++) {
     (e = a[b]) && c < e.length && (c = e.length);
   }
   return c;
 }
-;const da = /[^\p{L}\p{N}]+/u, ea = /(\d{3})/g, fa = /(\D)(\d{3})/g, ha = /(\d{3})(\D)/g, ia = /[\u0300-\u036f]/g;
-function ja(a = {}) {
-  if (!this || this.constructor !== ja) {
-    return new ja(...arguments);
+;const ea = /[^\p{L}\p{N}]+/u, fa = /(\d{3})/g, ha = /(\D)(\d{3})/g, ia = /(\d{3})(\D)/g, ja = /[\u0300-\u036f]/g;
+function G(a = {}) {
+  if (!this || this.constructor !== G) {
+    return new G(...arguments);
   }
   if (arguments.length) {
     for (a = 0; a < arguments.length; a++) {
@@ -89,7 +89,7 @@ function ja(a = {}) {
     this.assign(a);
   }
 }
-t = ja.prototype;
+t = G.prototype;
 t.assign = function(a) {
   this.normalize = z(a.normalize, !0, this.normalize);
   let c = a.include, b = c || a.exclude || a.split, e;
@@ -117,7 +117,7 @@ t.assign = function(a) {
     this.numeric = z(a.numeric, e);
   } else {
     try {
-      this.split = z(this.split, da);
+      this.split = z(this.split, ea);
     } catch (d) {
       console.warn("This platform does not support unicode regex. It falls back to using simple whitespace splitter instead: /s+/."), this.split = /\s+/;
     }
@@ -212,9 +212,9 @@ t.encode = function(a) {
       this.H = setTimeout(H, 50, this);
     }
   }
-  this.normalize && ("function" === typeof this.normalize ? a = this.normalize(a) : a = ia ? a.normalize("NFKD").replace(ia, "").toLowerCase() : a.toLowerCase());
+  this.normalize && ("function" === typeof this.normalize ? a = this.normalize(a) : a = ja ? a.normalize("NFKD").replace(ja, "").toLowerCase() : a.toLowerCase());
   this.prepare && (a = this.prepare(a));
-  this.numeric && 3 < a.length && (a = a.replace(fa, "$1 $2").replace(ha, "$1 $2").replace(ea, "$1 "));
+  this.numeric && 3 < a.length && (a = a.replace(ha, "$1 $2").replace(ia, "$1 $2").replace(fa, "$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;
   for (let f = 0, g, h; f < e.length; f++) {
@@ -660,7 +660,7 @@ function Ba(a) {
   return b;
 }
 ;U.prototype.add = function(a, c, b) {
-  G(a) && (c = a, a = ba(c, this.key));
+  aa(a) && (c = a, a = ca(c, this.key));
   if (c && (a || 0 === a)) {
     if (!b && this.reg.has(a)) {
       return this.update(a, c);
@@ -692,7 +692,7 @@ function Ba(a) {
             continue;
           }
           f.constructor === String && (f = "" + f);
-          f = ba(c, f);
+          f = ca(c, f);
         }
         if (d && f) {
           D(f) && (f = [f]);
@@ -1031,7 +1031,7 @@ function La(a, c, b, e, d, f, g) {
     if (this.result.length && a.unshift(this.result), 2 > a.length) {
       this.result = a[0];
     } else {
-      if (c = ca(a)) {
+      if (c = da(a)) {
         return this.result = Fa(a, c, b, e, g, this.h, f), f ? d ? V.call(this.index, this.result) : this.result : this;
       }
       this.result = [];
@@ -1213,7 +1213,7 @@ W.prototype.resolve = function(a, c, b) {
 };
 A();
 U.prototype.search = function(a, c, b, e) {
-  b || (!c && G(a) ? (b = a, a = "") : G(c) && (b = c, c = 0));
+  b || (!c && aa(a) ? (b = a, a = "") : aa(c) && (b = c, c = 0));
   let d = [];
   var f = [];
   let g;
@@ -1438,7 +1438,7 @@ function Ra(a, c, b, e, d) {
     h = m.tokenize;
     l !== f && (f = l, g = f.encode(a));
     for (let r = 0; r < p.length; r++) {
-      let q = "", u = ba(p[r].doc, n).split(/\s+/);
+      let q = "", u = ca(p[r].doc, n).split(/\s+/);
       for (let v = 0, w, x; v < u.length; v++) {
         w = u[v];
         x = l.encode(w);
@@ -1523,7 +1523,7 @@ function V(a) {
   this.store = b && (e ? new S(e) : new Map());
   this.cache = (b = a.cache || null) && new X(b);
   a.cache = !1;
-  this.worker = a.worker;
+  this.worker = a.worker || !1;
   this.priority = a.priority || 4;
   this.index = Ua.call(this, a, c);
   this.tag = null;
@@ -1546,19 +1546,29 @@ function V(a) {
   }
   if (this.worker) {
     this.fastupdate = !1;
-    a = [];
-    for (const d of this.index.values()) {
-      d.then && a.push(d);
+    const d = [];
+    for (const f of this.index.values()) {
+      f.then && d.push(f);
     }
-    if (a.length) {
-      const d = this;
-      return Promise.all(a).then(function(f) {
-        let g = 0;
-        for (const h of d.index.entries()) {
-          const k = h[0];
-          h[1].then && d.index.set(k, f[g++]);
+    if (d.length) {
+      const f = this;
+      return Promise.all(d).then(function(g) {
+        const h = new Map();
+        let k = 0;
+        for (const m of f.index.entries()) {
+          const n = m[0];
+          var l = m[1];
+          if (l.then) {
+            l = d[k].encoder || {};
+            let p = h.get(l);
+            p || (p = l.encode ? l : new G(l), h.set(l, p));
+            l = g[k];
+            l.encoder = p;
+            f.index.set(n, l);
+            k++;
+          }
         }
-        return d;
+        return f;
       });
     }
   } else {
@@ -1572,28 +1582,30 @@ t.mount = function(a) {
   }
   let c = this.field;
   if (this.tag) {
-    for (let d = 0, f; d < this.R.length; d++) {
-      f = this.R[d];
+    for (let f = 0, g; f < this.R.length; f++) {
+      g = this.R[f];
       var b = void 0;
-      this.index.set(f, b = new N({}, this.reg));
+      this.index.set(g, b = new N({}, this.reg));
       c === this.field && (c = c.slice(0));
-      c.push(f);
-      b.tag = this.tag.get(f);
+      c.push(g);
+      b.tag = this.tag.get(g);
     }
   }
   b = [];
   const e = {db:a.db, type:a.type, fastupdate:a.fastupdate};
-  for (let d = 0, f, g; d < c.length; d++) {
-    e.field = g = c[d];
-    f = this.index.get(g);
-    const h = new a.constructor(a.id, e);
-    h.id = a.id;
-    b[d] = h.mount(f);
-    f.document = !0;
-    d ? f.bypass = !0 : f.store = this.store;
+  for (let f = 0, g, h; f < c.length; f++) {
+    e.field = h = c[f];
+    g = this.index.get(h);
+    const k = new a.constructor(a.id, e);
+    k.id = a.id;
+    b[f] = k.mount(g);
+    g.document = !0;
+    f ? g.bypass = !0 : g.store = this.store;
   }
-  this.db = !0;
-  return Promise.all(b);
+  const d = this;
+  return this.db = Promise.all(b).then(function() {
+    d.db = !0;
+  });
 };
 t.commit = async function(a, c) {
   const b = [];
@@ -1617,9 +1629,10 @@ function Ua(a, c) {
   for (let d = 0, f, g; d < e.length; d++) {
     f = e[d];
     D(f) || (g = f, f = f.field);
-    g = G(g) ? Object.assign({}, a, g) : a;
+    g = aa(g) ? Object.assign({}, a, g) : a;
     if (this.worker) {
       const h = new P(g);
+      h.encoder = g.encoder;
       b.set(f, h);
     }
     this.worker || b.set(f, new N(g, this.reg));
@@ -1651,7 +1664,7 @@ t.update = function(a, c) {
   return this.remove(a).add(a, c);
 };
 t.remove = function(a) {
-  G(a) && (a = ba(a, this.key));
+  aa(a) && (a = ca(a, this.key));
   for (var c of this.index.values()) {
     c.remove(a, !0);
   }
@@ -1701,7 +1714,7 @@ t.get = function(a) {
   }) : this.store.get(a) || null;
 };
 t.set = function(a, c) {
-  "object" === typeof a && (c = a, a = ba(c, this.key));
+  "object" === typeof a && (c = a, a = ca(c, this.key));
   this.store.set(a, c);
   return this;
 };
@@ -2076,7 +2089,7 @@ function ib(a, c, b, e, d, f, g, h) {
   }
   b = a.context;
   const e = !0 === b ? {depth:1} : b || {}, d = D(a.encoder) ? bb[a.encoder] : a.encode || a.encoder || {};
-  this.encoder = d.encode ? d : "object" === typeof d ? new ja(d) : {encode:d};
+  this.encoder = d.encode ? d : "object" === typeof d ? new G(d) : {encode:d};
   this.resolution = a.resolution || 9;
   this.tokenize = b = (b = a.tokenize) && "default" !== b && "exact" !== b && b || "strict";
   this.depth = "strict" === b && e.depth || 0;
@@ -2209,7 +2222,7 @@ t.serialize = function(a = !0) {
 la(N.prototype);
 const lb = "undefined" !== typeof window && (window.indexedDB || window.mozIndexedDB || window.webkitIndexedDB || window.msIndexedDB), mb = ["map", "ctx", "tag", "reg", "cfg"], Y = A();
 function nb(a, c = {}) {
-  if (!this) {
+  if (!this || this.constructor !== nb) {
     return new nb(a, c);
   }
   "object" === typeof a && (c = a, a = a.name);
@@ -2223,7 +2236,7 @@ function nb(a, c = {}) {
 }
 t = nb.prototype;
 t.mount = function(a) {
-  if (!a.encoder) {
+  if (a.index) {
     return a.mount(this);
   }
   a.db = this;
@@ -2375,7 +2388,7 @@ t.commit = async function(a, c, b) {
         e[d] = f.del;
       }
     }
-    c || (b || (e = e.concat(aa(a.reg))), e.length && await this.remove(e));
+    c || (b || (e = e.concat(ba(a.reg))), e.length && await this.remove(e));
   }
   a.reg.size && (await this.transaction("map", "readwrite", function(e) {
     for (const d of a.map) {
@@ -2510,6 +2523,6 @@ function Z(a, c) {
     a = null;
   });
 }
-;export default {Index:N, Charset:bb, Encoder:ja, Document:U, Worker:P, Resolver:W, IndexedDB:nb, Language:{}};
+;export default {Index:N, Charset:bb, Encoder:G, Document:U, Worker:P, Resolver:W, IndexedDB:nb, Language:{}};
 
-export const Index=N;export const  Charset=bb;export const  Encoder=ja;export const  Document=U;export const  Worker=P;export const  Resolver=W;export const  IndexedDB=nb;export const  Language={};
\ No newline at end of file
+export const Index=N;export const  Charset=bb;export const  Encoder=G;export const  Document=U;export const  Worker=P;export const  Resolver=W;export const  IndexedDB=nb;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 2d51e5d..89c2bdb 100644
--- a/dist/flexsearch.bundle.module.min.js
+++ b/dist/flexsearch.bundle.module.min.js
@@ -1,19 +1,19 @@
 /**!
- * FlexSearch.js v0.8.155 (Bundle/Module)
+ * FlexSearch.js v0.8.156 (Bundle/Module)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
  * https://github.com/nextapps-de/flexsearch
  */
 var t;function z(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 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"===d?b:a}function A(){return Object.create(null)}function D(a){return"string"===typeof a}
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+function G(a){return"object"===typeof a}function aa(a){const b=[];for(const c of a.keys())b.push(c);return b}function ba(a,b){if(D(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,e;c<a.length;c++)(e=a[c])&&b<e.length&&(b=e.length);return b};const da=/[^\p{L}\p{N}]+/u,ea=/(\d{3})/g,fa=/(\D)(\d{3})/g,ha=/(\d{3})(\D)/g,ia=/[\u0300-\u036f]/g;function H(a={}){if(!this||this.constructor!==H)return new H(...arguments);if(arguments.length)for(a=0;a<arguments.length;a++)this.assign(arguments[a]);else this.assign(a)}t=H.prototype;
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-this.numeric=z(a.numeric,e)}else{try{this.split=z(this.split,ca)}catch(d){this.split=/\s+/}this.numeric=z(a.numeric,z(this.numeric,!0))}this.prepare=z(a.prepare,null,this.prepare);this.finalize=z(a.finalize,null,this.finalize);c=a.filter;this.filter="function"===typeof c?c:z(c&&new Set(c),null,this.filter);this.dedupe=z(a.dedupe,!0,this.dedupe);this.matcher=z((c=a.matcher)&&new Map(c),null,this.matcher);this.mapper=z((c=a.mapper)&&new Map(c),null,this.mapper);this.stemmer=z((c=a.stemmer)&&new Map(c),
+this.numeric=z(a.numeric,e)}else{try{this.split=z(this.split,da)}catch(d){this.split=/\s+/}this.numeric=z(a.numeric,z(this.numeric,!0))}this.prepare=z(a.prepare,null,this.prepare);this.finalize=z(a.finalize,null,this.finalize);c=a.filter;this.filter="function"===typeof c?c:z(c&&new Set(c),null,this.filter);this.dedupe=z(a.dedupe,!0,this.dedupe);this.matcher=z((c=a.matcher)&&new Map(c),null,this.matcher);this.mapper=z((c=a.mapper)&&new Map(c),null,this.mapper);this.stemmer=z((c=a.stemmer)&&new Map(c),
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 (this.A?"|":"")+d;return this};t.addStemmer=function(a,b){this.stemmer||(this.stemmer=new Map);this.stemmer.set(a,b);this.A+=(this.A?"|":"")+a;this.N=null;this.cache&&I(this);return this};t.addFilter=function(a){"function"===typeof a?this.filter=a:(this.filter||(this.filter=new Set),this.filter.add(a));this.cache&&I(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&&I(this);return this};t.addMatcher=function(a,b){if("object"===typeof a)return this.addReplacer(a,b);if(2>a.length&&(this.dedupe||this.mapper))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&&I(this);return this};
 t.addReplacer=function(a,b){if("string"===typeof a)return this.addMatcher(a,b);this.replacer||(this.replacer=[]);this.replacer.push(a,b);this.cache&&I(this);return this};
-t.encode=function(a){if(this.cache&&a.length<=this.K)if(this.H){if(this.B.has(a))return this.B.get(a)}else this.H=setTimeout(I,50,this);this.normalize&&("function"===typeof this.normalize?a=this.normalize(a):a=ha?a.normalize("NFKD").replace(ha,"").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 b=!(this.dedupe||this.mapper||this.filter||this.matcher||this.stemmer||this.replacer);let c=
+t.encode=function(a){if(this.cache&&a.length<=this.K)if(this.H){if(this.B.has(a))return this.B.get(a)}else this.H=setTimeout(I,50,this);this.normalize&&("function"===typeof this.normalize?a=this.normalize(a):a=ia?a.normalize("NFKD").replace(ia,"").toLowerCase():a.toLowerCase());this.prepare&&(a=this.prepare(a));this.numeric&&3<a.length&&(a=a.replace(fa,"$1 $2").replace(ha,"$1 $2").replace(ea,"$1 "));const b=!(this.dedupe||this.mapper||this.filter||this.matcher||this.stemmer||this.replacer);let c=
 [],e=this.split||""===this.split?a.split(this.split):a;for(let f=0,g,h;f<e.length;f++)if((g=h=e[f])&&!(g.length<this.minlength||g.length>this.maxlength))if(b)c.push(g);else if(!this.filter||("function"===typeof this.filter?this.filter(g):!this.filter.has(g))){if(this.cache&&g.length<=this.L)if(this.H){var d=this.G.get(g);if(d||""===d){d&&c.push(d);continue}}else this.H=setTimeout(I,50,this);this.stemmer&&2<g.length&&(this.N||(this.N=new RegExp("(?!^)("+this.A+")$")),g=g.replace(this.N,k=>this.stemmer.get(k)));
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 (this.G.clear(),this.L=this.L/1.1|0));g&&c.push(g)}this.finalize&&(c=this.finalize(c)||c);this.cache&&a.length<=this.K&&(this.B.set(a,c),this.B.size>this.S&&(this.B.clear(),this.K=this.K/1.1|0));return c};function I(a){a.H=null;a.B.clear();a.G.clear()};let K,ja;async function ka(a){a=a.data;var b=a.task;const c=a.id;let e=a.args;switch(b){case "init":ja=a.options||{};(b=a.factory)?(Function("return "+b)()(self),K=new self.FlexSearch.Index(ja),delete self.FlexSearch):K=new M(ja);postMessage({id:c});break;default:let d;"export"===b&&(e[1]?(e[0]=ja.export,e[2]=0,e[3]=1):e=null);"import"===b?e[0]&&(a=await ja.import.call(K,e[0]),K.import(e[0],a)):(d=e&&K[b].apply(K,e))&&d.then&&(d=await d);postMessage("search"===b?{id:c,msg:d}:{id:c})}};function la(a){ma.call(a,"add");ma.call(a,"append");ma.call(a,"search");ma.call(a,"update");ma.call(a,"remove")}let na,oa,pa;function qa(){na=pa=0}
@@ -31,15 +31,15 @@ if("includes"===e)return function(d){for(let f=0;f<b.index.length;f++)if(b.index
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+!0})};t.commit=async function(a,b){const c=[];for(const e of this.index.values())c.push(e.commit(a,b));await Promise.all(c);this.reg.clear()};t.destroy=function(){const a=[];for(const b of this.index.values())a.push(b.destroy());return Promise.all(a)};
+function Ua(a,b){const c=new Map;let e=b.index||b.field||b;D(e)&&(e=[e]);for(let d=0,f,g;d<e.length;d++){f=e[d];D(f)||(g=f,f=f.field);g=G(g)?Object.assign({},a,g):a;if(this.worker){const h=new P(g);h.encoder=g.encoder;c.set(f,h)}this.worker||c.set(f,new M(g,this.reg));g.custom?this.F[d]=g.custom:(this.F[d]=Ta(f,this.J),g.filter&&("string"===typeof this.F[d]&&(this.F[d]=new String(this.F[d])),this.F[d].I=g.filter));this.field[d]=f}if(this.C){a=b.store;D(a)&&(a=[a]);for(let d=0,f,g;d<a.length;d++)f=
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+t.remove=function(a){G(a)&&(a=ba(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],f=d.indexOf(a);-1<f&&(1<d.length?d.splice(f,1):c.delete(b))}this.store&&this.store.delete(a);this.reg.delete(a)}this.cache&&this.cache.remove(a);return this};
 t.clear=function(){const a=[];for(const b of this.index.values()){const c=b.clear();c.then&&a.push(c)}if(this.tag)for(const b of this.tag.values())b.clear();this.store&&this.store.clear();this.cache&&this.cache.clear();return a.length?Promise.all(a):this};t.contain=function(a){return this.db?this.index.get(this.field[0]).db.has(a):this.reg.has(a)};t.cleanup=function(){for(const a of this.index.values())a.cleanup();return this};
-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||null}):this.store.get(a)||null};t.set=function(a,b){"object"===typeof a&&(b=a,a=H(b,this.key));this.store.set(a,b);return this};t.searchCache=Va;
+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||null}):this.store.get(a)||null};t.set=function(a,b){"object"===typeof a&&(b=a,a=ba(b,this.key));this.store.set(a,b);return this};t.searchCache=Va;
 t.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 b.then(function(){return h.export(a,g,c+1)})}return this.export(a,g,c+1)}let d,f;switch(e){case 0:d="reg";f=wa(this.reg);b=null;break;case 1:d="tag";f=this.tag&&ua(this.tag,this.reg.size);b=null;break;case 2:d="doc";f=this.store&&sa(this.store);b=null;break;default:return}return ya.call(this,a,b,d,f,c,e)};
 t.import=function(a,b){var c=a.split(".");"json"===c[c.length-1]&&c.pop();const e=2<c.length?c[0]:"";c=2<c.length?c[2]:c[1];if(this.worker&&e)return this.index.get(e).import(a);if(b){"string"===typeof b&&(b=JSON.parse(b));if(e)return this.index.get(e).import(c,b);switch(c){case "reg":this.fastupdate=!1;this.reg=xa(b,this.reg);for(let d=0,f;d<this.field.length;d++)f=this.index.get(this.field[d]),f.fastupdate=!1,f.reg=this.reg;if(this.worker){b=[];for(const d of this.index.values())b.push(d.import(a));
 return Promise.all(b)}break;case "tag":this.tag=va(b,this.tag);break;case "doc":this.store=ta(b,this.store)}}};la(U.prototype);function Va(a,b,c){const e=("object"===typeof a?""+a.query:a).toLowerCase();this.cache||(this.cache=new X);let d=this.cache.get(e);if(!d){d=this.search(a,b,c);if(d.then){const f=this;d.then(function(g){f.cache.set(e,g);return g})}this.cache.set(e,d)}return d}function X(a){this.limit=a&&!0!==a?a:1E3;this.cache=new Map;this.h=""}X.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)};
@@ -72,14 +72,14 @@ function gb(a,b,c,e,d,f,g){let h=g?a.ctx:a.map,k;if(!b[c]||g&&!(k=b[c])[g])if(g?
 function fb(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};M.prototype.search=function(a,b,c){c||(b||"object"!==typeof a?"object"===typeof b&&(c=b,b=0):(c=a,a=""));let e=[],d,f,g,h=0,k,l,m,n,p;c?(a=c.query||a,b=c.limit||b,h=c.offset||0,f=c.context,g=c.suggest,p=(k=!1!==c.resolve)&&c.enrich,m=c.boost,n=c.resolution,l=this.db&&c.tag):k=this.resolve;let r=this.encoder.encode(a);d=r.length;b=b||(k?100:0);if(1===d)return hb.call(this,r[0],"",b,h,k,p,l);f=this.depth&&!1!==f;if(2===d&&f&&!g)return hb.call(this,r[1],r[0],b,h,k,p,l);let q=A(),u=0,v;f&&(v=r[0],u=1);
 n||0===n||(n=v?this.U:this.resolution);if(this.db){if(this.db.search&&(a=this.db.search(this,r,b,h,g,k,p,l),!1!==a))return a;const w=this;return async function(){for(let x,F;u<d;u++){if((F=r[u])&&!q[F]){q[F]=1;x=await ib(w,F,v,0,0,!1,!1);if(x=jb(x,e,g,n)){e=x;break}v&&(g&&x&&e.length||(v=F))}g&&v&&u===d-1&&!e.length&&(n=w.resolution,v="",u=-1,q=A())}return kb(e,n,b,h,g,m,k)}()}for(let w,x;u<d;u++){if((x=r[u])&&!q[x]){q[x]=1;w=ib(this,x,v,0,0,!1,!1);if(w=jb(w,e,g,n)){e=w;break}v&&(g&&w&&e.length||
 (v=x))}g&&v&&u===d-1&&!e.length&&(n=this.resolution,v="",u=-1,q=A())}return kb(e,n,b,h,g,m,k)};function kb(a,b,c,e,d,f,g){let h=a.length,k=a;if(1<h)k=Fa(a,b,c,e,d,f,g);else if(1===h)return g?Ia.call(null,a[0],c,e):new W(a[0]);return g?k:new W(k)}function hb(a,b,c,e,d,f,g){a=ib(this,a,b,c,e,d,f,g);return this.db?a.then(function(h){return d?h||[]:new W(h)}):a&&a.length?d?Ia.call(this,a,c,e):new W(a):d?[]:new W}
-function jb(a,b,c,e){let d=[];if(a&&a.length){if(a.length<=e){b.push(a);return}for(let f=0,g;f<e;f++)if(g=a[f])d[f]=g;if(d.length){b.push(d);return}}if(!c)return d}function ib(a,b,c,e,d,f,g,h){let k;c&&(k=a.bidirectional&&b>c)&&(k=c,c=b,b=k);if(a.db)return a.db.get(b,c,e,d,f,g,h);a=c?(a=a.ctx.get(c))&&a.get(b):a.map.get(b);return a};function M(a,b){if(!this||this.constructor!==M)return new M(a);if(a){var c=D(a)?a:a.preset;c&&(a=Object.assign({},eb[c],a))}else a={};c=a.context;const e=!0===c?{depth:1}:c||{},d=D(a.encoder)?bb[a.encoder]:a.encode||a.encoder||{};this.encoder=d.encode?d:"object"===typeof d?new ia(d):{encode:d};this.resolution=a.resolution||9;this.tokenize=c=(c=a.tokenize)&&"default"!==c&&"exact"!==c&&c||"strict";this.depth="strict"===c&&e.depth||0;this.bidirectional=!1!==e.bidirectional;this.fastupdate=!!a.fastupdate;
+function jb(a,b,c,e){let d=[];if(a&&a.length){if(a.length<=e){b.push(a);return}for(let f=0,g;f<e;f++)if(g=a[f])d[f]=g;if(d.length){b.push(d);return}}if(!c)return d}function ib(a,b,c,e,d,f,g,h){let k;c&&(k=a.bidirectional&&b>c)&&(k=c,c=b,b=k);if(a.db)return a.db.get(b,c,e,d,f,g,h);a=c?(a=a.ctx.get(c))&&a.get(b):a.map.get(b);return a};function M(a,b){if(!this||this.constructor!==M)return new M(a);if(a){var c=D(a)?a:a.preset;c&&(a=Object.assign({},eb[c],a))}else a={};c=a.context;const e=!0===c?{depth:1}:c||{},d=D(a.encoder)?bb[a.encoder]:a.encode||a.encoder||{};this.encoder=d.encode?d:"object"===typeof d?new H(d):{encode:d};this.resolution=a.resolution||9;this.tokenize=c=(c=a.tokenize)&&"default"!==c&&"exact"!==c&&c||"strict";this.depth="strict"===c&&e.depth||0;this.bidirectional=!1!==e.bidirectional;this.fastupdate=!!a.fastupdate;
 this.score=a.score||null;(c=a.keystore||0)&&(this.keystore=c);this.map=c?new S(c):new Map;this.ctx=c?new S(c):new Map;this.reg=b||(this.fastupdate?c?new S(c):new Map:c?new T(c):new Set);this.U=e.resolution||3;this.rtl=d.rtl||a.rtl||!1;this.cache=(c=a.cache||null)&&new X(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;this.priority=a.priority||4}t=M.prototype;
 t.mount=function(a){this.commit_timer&&(clearTimeout(this.commit_timer),this.commit_timer=null);return a.mount(this)};t.commit=function(a,b){this.commit_timer&&(clearTimeout(this.commit_timer),this.commit_timer=null);return this.db.commit(this,a,b)};t.destroy=function(){this.commit_timer&&(clearTimeout(this.commit_timer),this.commit_timer=null);return this.db.destroy()};function db(a){a.commit_timer||(a.commit_timer=setTimeout(function(){a.commit_timer=null;a.db.commit(a,void 0,void 0)},1))}
 t.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};t.append=function(a,b){return this.add(a,b,!0)};t.contain=function(a){return this.db?this.db.has(a):this.reg.has(a)};t.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)};
 t.cleanup=function(){if(!this.fastupdate)return this;cb(this.map);this.depth&&cb(this.ctx);return this};t.searchCache=Va;t.export=function(a,b,c=0,e=0){let d,f;switch(e){case 0:d="reg";f=wa(this.reg);break;case 1:d="cfg";f=null;break;case 2:d="map";f=sa(this.map,this.reg.size);break;case 3:d="ctx";f=ua(this.ctx,this.reg.size);break;default:return}return ya.call(this,a,b,d,f,c,e)};
 t.import=function(a,b){if(b)switch("string"===typeof b&&(b=JSON.parse(b)),a=a.split("."),"json"===a[a.length-1]&&a.pop(),3===a.length&&a.shift(),a=1<a.length?a[1]:a[0],a){case "reg":this.fastupdate=!1;this.reg=xa(b,this.reg);break;case "map":this.map=ta(b,this.map);break;case "ctx":this.ctx=va(b,this.ctx)}};
 t.serialize=function(a=!0){let b="",c="",e="";if(this.reg.size){let f;for(var d of this.reg.keys())f||(f=typeof d),b+=(b?",":"")+("string"===f?'"'+d+'"':d);b="index.reg=new Set(["+b+"]);";c=za(this.map,f);c="index.map=new Map(["+c+"]);";for(const g of this.ctx.entries()){d=g[0];let h=za(g[1],f);h="new Map(["+h+"])";h='["'+d+'",'+h+"]";e+=(e?",":"")+h}e="index.ctx=new Map(["+e+"]);"}return a?"function inject(index){"+b+c+e+"}":b+c+e};la(M.prototype);const lb="undefined"!==typeof window&&(window.indexedDB||window.mozIndexedDB||window.webkitIndexedDB||window.msIndexedDB),mb=["map","ctx","tag","reg","cfg"],Y=A();
-function ob(a,b={}){if(!this)return new ob(a,b);"object"===typeof a&&(b=a,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.type=b.type;this.fastupdate=this.support_tag_search=!1;this.db=null;this.h={}}t=ob.prototype;t.mount=function(a){if(!a.encoder)return a.mount(this);a.db=this;return this.open()};
+function ob(a,b={}){if(!this||this.constructor!==ob)return new ob(a,b);"object"===typeof a&&(b=a,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.type=b.type;this.fastupdate=this.support_tag_search=!1;this.db=null;this.h={}}t=ob.prototype;t.mount=function(a){if(a.index)return a.mount(this);a.db=this;return this.open()};
 t.open=function(){if(this.db)return this.db;let a=this;navigator.storage&&navigator.storage.persist();Y[a.id]||(Y[a.id]=[]);Y[a.id].push(a.field);const b=lb.open(a.id,1);b.onupgradeneeded=function(){const c=a.db=this.result;for(let e=0,d;e<mb.length;e++){d=mb[e];for(let f=0,g;f<Y[a.id].length;f++)g=Y[a.id][f],c.objectStoreNames.contains(d+("reg"!==d?g?":"+g:"":""))||c.createObjectStore(d+("reg"!==d?g?":"+g:"":""))}};return a.db=Z(b,function(c){a.db=c;a.db.onversionchange=function(){a.close()}})};
 t.close=function(){this.db&&this.db.close();this.db=null};t.destroy=function(){const a=lb.deleteDatabase(this.id);return Z(a)};t.clear=function(){const a=[];for(let c=0,e;c<mb.length;c++){e=mb[c];for(let d=0,f;d<Y[this.id].length;d++)f=Y[this.id][d],a.push(e+("reg"!==e?f?":"+f:"":""))}const b=this.db.transaction(a,"readwrite");for(let c=0;c<a.length;c++)b.objectStore(a[c]).clear();return Z(b)};
 t.get=function(a,b,c=0,e=0,d=!0,f=!1){a=this.db.transaction((b?"ctx":"map")+(this.field?":"+this.field:""),"readonly").objectStore((b?"ctx":"map")+(this.field?":"+this.field:"")).get(b?b+":"+a:a);const g=this;return Z(a).then(function(h){let k=[];if(!h||!h.length)return k;if(d){if(!c&&!e&&1===h.length)return h[0];for(let l=0,m;l<h.length;l++)if((m=h[l])&&m.length){if(e>=m.length){e-=m.length;continue}const n=c?e+Math.min(m.length-e,c):m.length;for(let p=e;p<n;p++)k.push(m[p]);e=0;if(k.length===c)break}return f?
@@ -91,5 +91,5 @@ for(let m=0,n,p;m<l;m++)if((p=g[m])&&p.length){if((n=h[m])&&n.length)for(k=0;k<p
 0;n<u.length;n++)q.push(u[n]);else m[r]=u;n=1}}else m=l,n=1;n&&e.put(m,f+":"+k)})}}}),a.store?await this.transaction("reg","readwrite",function(e){for(const d of a.store){const f=d[0],g=d[1];e.put("object"===typeof g?JSON.stringify(g):1,f)}}):a.bypass||await this.transaction("reg","readwrite",function(e){for(const d of a.reg.keys())e.put(1,d)}),a.tag&&await this.transaction("tag","readwrite",function(e){for(const d of a.tag){const f=d[0],g=d[1];g.length&&(e.get(f).onsuccess=function(){let h=this.result;
 h=h&&h.length?h.concat(g):g;e.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 pb(a,b,c){const e=a.value;let d,f=0;for(let g=0,h;g<e.length;g++){if(h=c?e:e[g]){for(let k=0,l,m;k<b.length;k++)if(m=b[k],l=h.indexOf(m),0<=l)if(d=1,1<h.length)h.splice(l,1);else{e[g]=[];break}f+=h.length}if(c)break}f?d&&a.update(e):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(){const c=this.result;c&&pb(c,a)}}),this.transaction("ctx","readwrite",function(b){b.openCursor().onsuccess=function(){const c=this.result;c&&pb(c,a)}}),this.transaction("tag","readwrite",function(b){b.openCursor().onsuccess=function(){const c=this.result;c&&pb(c,a,!0)}}),this.transaction("reg","readwrite",function(b){for(let c=0;c<a.length;c++)b.delete(a[c])})])};
-function Z(a,b){return new Promise((c,e)=>{a.onsuccess=a.oncomplete=function(){b&&b(this.result);b=null;c(this.result)};a.onerror=a.onblocked=e;a=null})};export default {Index:M,Charset:bb,Encoder:ia,Document:U,Worker:P,Resolver:W,IndexedDB:ob,Language:{}};
-export const Index=M;export const Charset=bb;export const Encoder=ia;export const Document=U;export const Worker=P;export const Resolver=W;export const IndexedDB=ob;export const Language={};
\ No newline at end of file
+function Z(a,b){return new Promise((c,e)=>{a.onsuccess=a.oncomplete=function(){b&&b(this.result);b=null;c(this.result)};a.onerror=a.onblocked=e;a=null})};export default {Index:M,Charset:bb,Encoder:H,Document:U,Worker:P,Resolver:W,IndexedDB:ob,Language:{}};
+export const Index=M;export const Charset=bb;export const Encoder=H;export const Document=U;export const Worker=P;export const Resolver=W;export const IndexedDB=ob;export const Language={};
\ No newline at end of file
diff --git a/dist/flexsearch.compact.debug.js b/dist/flexsearch.compact.debug.js
index 1e0c607..cf43ce2 100644
--- a/dist/flexsearch.compact.debug.js
+++ b/dist/flexsearch.compact.debug.js
@@ -1,5 +1,5 @@
 /**!
- * FlexSearch.js v0.8.155 (Bundle/Debug)
+ * FlexSearch.js v0.8.156 (Bundle/Debug)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
diff --git a/dist/flexsearch.compact.min.js b/dist/flexsearch.compact.min.js
index b6d0bd7..b1f4b55 100644
--- a/dist/flexsearch.compact.min.js
+++ b/dist/flexsearch.compact.min.js
@@ -1,5 +1,5 @@
 /**!
- * FlexSearch.js v0.8.155 (Bundle)
+ * FlexSearch.js v0.8.156 (Bundle)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
diff --git a/dist/flexsearch.compact.module.debug.js b/dist/flexsearch.compact.module.debug.js
index d2ccf7c..bb9daca 100644
--- a/dist/flexsearch.compact.module.debug.js
+++ b/dist/flexsearch.compact.module.debug.js
@@ -1,5 +1,5 @@
 /**!
- * FlexSearch.js v0.8.155 (Bundle/Debug)
+ * FlexSearch.js v0.8.156 (Bundle/Debug)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
diff --git a/dist/flexsearch.compact.module.min.js b/dist/flexsearch.compact.module.min.js
index c35cfba..5763a6c 100644
--- a/dist/flexsearch.compact.module.min.js
+++ b/dist/flexsearch.compact.module.min.js
@@ -1,5 +1,5 @@
 /**!
- * FlexSearch.js v0.8.155 (Bundle)
+ * FlexSearch.js v0.8.156 (Bundle)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
diff --git a/dist/flexsearch.es5.debug.js b/dist/flexsearch.es5.debug.js
index 40dfdfe..08ed8c4 100644
--- a/dist/flexsearch.es5.debug.js
+++ b/dist/flexsearch.es5.debug.js
@@ -1,5 +1,5 @@
 /**!
- * FlexSearch.js v0.8.155 (ES5/Debug)
+ * FlexSearch.js v0.8.156 (ES5/Debug)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
@@ -1172,9 +1172,9 @@ function Ia(a) {
   Ka.call(a, "update");
   Ka.call(a, "remove");
 }
-var Ma, Na, Oa;
+var La, Na, Oa;
 function Pa() {
-  Ma = Oa = 0;
+  La = Oa = 0;
 }
 function Ka(a) {
   this[a + "Async"] = function() {
@@ -1183,7 +1183,7 @@ function Ka(a) {
       var d = c;
       delete b[b.length - 1];
     }
-    Ma ? Oa || (Oa = Date.now() - Na >= this.priority * this.priority * 3) : (Ma = setTimeout(Pa, 0), Na = Date.now());
+    La ? Oa || (Oa = Date.now() - Na >= this.priority * this.priority * 3) : (La = setTimeout(Pa, 0), Na = Date.now());
     if (Oa) {
       var e = this;
       return new Promise(function(f) {
@@ -2233,10 +2233,10 @@ V.prototype.search = function(a, b, c, d) {
         if (p) {
           if (this.db) {
             x.tag = p;
-            var La = v.db.support_tag_search;
+            var Ma = v.db.support_tag_search;
             x.field = n;
           }
-          La || (x.enrich = !1);
+          Ma || (x.enrich = !1);
         }
         if (r) {
           r[z] = v.search(a, b, x);
@@ -2251,7 +2251,7 @@ V.prototype.search = function(a, b, c, d) {
         E = [];
         N = 0;
         if (this.db && d) {
-          if (!La) {
+          if (!Ma) {
             for (H = n.length; H < d.length; H++) {
               var L = d[H];
               if (L && L.length) {
@@ -2296,7 +2296,7 @@ V.prototype.search = function(a, b, c, d) {
     }
   }
   if (r) {
-    if (this.db && p && p.length && !La) {
+    if (this.db && p && p.length && !Ma) {
       for (f = 0; f < p.length; f += 2) {
         g = this.index.get(p[f]);
         if (!g) {
@@ -2439,7 +2439,7 @@ function W(a) {
   this.store = c && (d ? new T(d) : new Map());
   this.cache = (c = a.cache || null) && new Y(c);
   a.cache = !1;
-  this.worker = a.worker;
+  this.worker = a.worker || !1;
   this.priority = a.priority || 4;
   this.index = xb.call(this, a, b);
   this.tag = null;
@@ -2463,20 +2463,21 @@ function W(a) {
   }
   if (this.worker) {
     this.fastupdate = !1;
-    a = [];
-    c = y(this.index.values());
-    for (b = c.next(); !b.done; b = c.next()) {
-      b = b.value, b.then && a.push(b);
+    var g = [];
+    a = y(this.index.values());
+    for (c = a.next(); !c.done; c = a.next()) {
+      c = c.value, c.then && g.push(c);
     }
-    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()) {
-          l = l.value;
-          var m = l[0];
-          l[1].then && g.index.set(m, f[h++]);
+    if (g.length) {
+      var f = this;
+      return Promise.all(g).then(function(h) {
+        for (var k = new Map(), l = 0, m = y(f.index.entries()), n = m.next(); !n.done; n = m.next()) {
+          var p = n.value;
+          n = p[0];
+          var q = p[1];
+          q.then && (q = g[l].encoder || {}, p = k.get(q), p || (p = q.encode ? q : new Ga(q), k.set(q, p)), q = h[l], q.encoder = p, f.index.set(n, q), l++);
         }
-        return g;
+        return f;
       });
     }
   } else {
@@ -2490,9 +2491,9 @@ u.mount = function(a) {
   }
   var b = this.field;
   if (this.tag) {
-    for (var c = 0, d; c < this.aa.length; c++) {
+    for (var c = 0, d = void 0; c < this.aa.length; c++) {
       d = this.aa[c];
-      var e;
+      var e = void 0;
       this.index.set(d, e = new O({}, this.reg));
       b === this.field && (b = b.slice(0));
       b.push(d);
@@ -2502,7 +2503,8 @@ u.mount = function(a) {
   c = [];
   d = {db:a.db, type:a.type, fastupdate:a.fastupdate};
   e = 0;
-  for (var g; e < b.length; e++) {
+  var g = void 0;
+  for (g = void 0; e < b.length; e++) {
     d.field = g = b[e];
     g = this.index.get(g);
     var f = new a.constructor(a.id, d);
@@ -2511,8 +2513,10 @@ u.mount = function(a) {
     g.document = !0;
     e ? g.bypass = !0 : g.store = this.store;
   }
-  this.db = !0;
-  return Promise.all(c);
+  var h = this;
+  return this.db = Promise.all(c).then(function() {
+    h.db = !0;
+  });
 };
 u.commit = function(a, b) {
   var c = this, d, e, g, f;
@@ -2544,6 +2548,7 @@ function xb(a, b) {
     f = xa(f) ? Object.assign({}, a, f) : a;
     if (this.worker) {
       var h = new Ra(f);
+      h.encoder = f.encoder;
       c.set(g, h);
     }
     this.worker || c.set(g, new O(f, this.reg));
@@ -3166,7 +3171,7 @@ Ja(O.prototype);
 var Pb = "undefined" !== typeof window && (window.indexedDB || window.mozIndexedDB || window.webkitIndexedDB || window.msIndexedDB), Qb = ["map", "ctx", "tag", "reg", "cfg"], Rb = I();
 function Sb(a, b) {
   b = void 0 === b ? {} : b;
-  if (!this) {
+  if (!this || this.constructor !== Sb) {
     return new Sb(a, b);
   }
   "object" === typeof a && (b = a, a = a.name);
@@ -3180,7 +3185,7 @@ function Sb(a, b) {
 }
 u = Sb.prototype;
 u.mount = function(a) {
-  if (!a.encoder) {
+  if (a.index) {
     return a.mount(this);
   }
   a.db = this;
diff --git a/dist/flexsearch.es5.min.js b/dist/flexsearch.es5.min.js
index 908708d..0509d57 100644
--- a/dist/flexsearch.es5.min.js
+++ b/dist/flexsearch.es5.min.js
@@ -1,5 +1,5 @@
 /**!
- * FlexSearch.js v0.8.155 (ES5)
+ * FlexSearch.js v0.8.156 (ES5)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
@@ -18,8 +18,8 @@ C("Promise",function(a){function b(f){this.A=0;this.B=void 0;this.h=[];this.H=!1
 f[h];f[h]=null;try{k()}catch(l){this.C(l)}}}this.h=null};c.prototype.C=function(f){this.B(function(){throw f;})};b.prototype.C=function(){function f(l){return function(m){k||(k=!0,l.call(h,m))}}var h=this,k=!1;return{resolve:f(this.fa),reject:f(this.D)}};b.prototype.fa=function(f){if(f===this)this.D(new TypeError("A Promise cannot resolve to itself"));else if(f instanceof b)this.ha(f);else{a:switch(typeof f){case "object":var h=null!=f;break a;case "function":h=!0;break a;default:h=!1}h?this.ea(f):
 this.G(f)}};b.prototype.ea=function(f){var h=void 0;try{h=f.then}catch(k){this.D(k);return}"function"==typeof h?this.ia(h,f):this.G(f)};b.prototype.D=function(f){this.M(2,f)};b.prototype.G=function(f){this.M(1,f)};b.prototype.M=function(f,h){if(0!=this.A)throw Error("Cannot settle("+f+", "+h+"): Promise already settled in state"+this.A);this.A=f;this.B=h;2===this.A&&this.ga();this.N()};b.prototype.ga=function(){var f=this;e(function(){if(f.T()){var h=B.console;"undefined"!==typeof h&&h.error(f.B)}},
 1)};b.prototype.T=function(){if(this.H)return!1;var f=B.CustomEvent,h=B.Event,k=B.dispatchEvent;if("undefined"===typeof k)return!0;"function"===typeof f?f=new f("unhandledrejection",{cancelable:!0}):"function"===typeof h?f=new h("unhandledrejection",{cancelable:!0}):(f=B.document.createEvent("CustomEvent"),f.initCustomEvent("unhandledrejection",!1,!0,f));f.promise=this;f.reason=this.B;return k(f)};b.prototype.N=function(){if(null!=this.h){for(var f=0;f<this.h.length;++f)g.A(this.h[f]);this.h=null}};
-var g=new c;b.prototype.ha=function(f){var h=this.C();f.U(h.resolve,h.reject)};b.prototype.ia=function(f,h){var k=this.C();try{f.call(h,k.resolve,k.reject)}catch(l){k.reject(l)}};b.prototype.then=function(f,h){function k(p,q){return"function"==typeof p?function(r){try{l(p(r))}catch(w){m(w)}}:q}var l,m,n=new b(function(p,q){l=p;m=q});this.U(k(f,l),k(h,m));return n};b.prototype.catch=function(f){return this.then(void 0,f)};b.prototype.U=function(f,h){function k(){switch(l.A){case 1:f(l.B);break;case 2:h(l.B);
-break;default:throw Error("Unexpected state: "+l.A);}}var l=this;null==this.h?g.A(k):this.h.push(k);this.H=!0};b.resolve=d;b.reject=function(f){return new b(function(h,k){k(f)})};b.race=function(f){return new b(function(h,k){for(var l=y(f),m=l.next();!m.done;m=l.next())d(m.value).U(h,k)})};b.all=function(f){var h=y(f),k=h.next();return k.done?d([]):new b(function(l,m){function n(r){return function(w){p[r]=w;q--;0==q&&l(p)}}var p=[],q=0;do p.push(void 0),q++,d(k.value).U(n(p.length-1),m),k=h.next();
+var g=new c;b.prototype.ha=function(f){var h=this.C();f.U(h.resolve,h.reject)};b.prototype.ia=function(f,h){var k=this.C();try{f.call(h,k.resolve,k.reject)}catch(l){k.reject(l)}};b.prototype.then=function(f,h){function k(q,p){return"function"==typeof q?function(r){try{l(q(r))}catch(w){m(w)}}:p}var l,m,n=new b(function(q,p){l=q;m=p});this.U(k(f,l),k(h,m));return n};b.prototype.catch=function(f){return this.then(void 0,f)};b.prototype.U=function(f,h){function k(){switch(l.A){case 1:f(l.B);break;case 2:h(l.B);
+break;default:throw Error("Unexpected state: "+l.A);}}var l=this;null==this.h?g.A(k):this.h.push(k);this.H=!0};b.resolve=d;b.reject=function(f){return new b(function(h,k){k(f)})};b.race=function(f){return new b(function(h,k){for(var l=y(f),m=l.next();!m.done;m=l.next())d(m.value).U(h,k)})};b.all=function(f){var h=y(f),k=h.next();return k.done?d([]):new b(function(l,m){function n(r){return function(w){q[r]=w;p--;0==p&&l(q)}}var q=[],p=0;do q.push(void 0),p++,d(k.value).U(n(q.length-1),m),k=h.next();
 while(!k.done)})};return b});function va(a,b){a instanceof String&&(a+="");var c=0,d=!1,e={next:function(){if(!d&&c<a.length){var g=c++;return{value:b(g,a[g]),done:!1}}d=!0;return{done:!0,value:void 0}}};e[Symbol.iterator]=function(){return e};return e}C("Array.prototype.values",function(a){return a?a:function(){return va(this,function(b,c){return c})}});C("Array.prototype.keys",function(a){return a?a:function(){return va(this,function(b){return b})}});
 function F(a,b){return Object.prototype.hasOwnProperty.call(a,b)}
 C("WeakMap",function(a){function b(k){this.h=(h+=Math.random()+1).toString();if(k){k=y(k);for(var l;!(l=k.next()).done;)l=l.value,this.set(l[0],l[1])}}function c(){}function d(k){var l=typeof k;return"object"===l&&null!==k||"function"===l}function e(k){if(!F(k,f)){var l=new c;ba(k,f,{value:l})}}function g(k){var l=Object[k];l&&(Object[k]=function(m){if(m instanceof c)return m;Object.isExtensible(m)&&e(m);return l(m)})}if(function(){if(!a||!Object.seal)return!1;try{var k=Object.seal({}),l=Object.seal({}),
@@ -45,12 +45,12 @@ b=a.next();!b.done;b=a.next())this.A+=(this.A?"|":"")+b.value;return this};u.add
 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&&K(this);return this};u.addMatcher=function(a,b){if("object"===typeof a)return this.addReplacer(a,b);if(2>a.length&&(this.dedupe||this.mapper))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&&K(this);return this};
 u.addReplacer=function(a,b){if("string"===typeof a)return this.addMatcher(a,b);this.replacer||(this.replacer=[]);this.replacer.push(a,b);this.cache&&K(this);return this};
 u.encode=function(a){var b=this;if(this.cache&&a.length<=this.G)if(this.D){if(this.B.has(a))return this.B.get(a)}else this.D=setTimeout(K,50,this);this.normalize&&("function"===typeof this.normalize?a=this.normalize(a):a=Fa?a.normalize("NFKD").replace(Fa,"").toLowerCase():a.toLowerCase());this.prepare&&(a=this.prepare(a));this.numeric&&3<a.length&&(a=a.replace(Da,"$1 $2").replace(Ea,"$1 $2").replace(Ca,"$1 "));for(var c=!(this.dedupe||this.mapper||this.filter||this.matcher||this.stemmer||this.replacer),
-d=[],e=this.split||""===this.split?a.split(this.split):a,g=0,f=void 0,h=void 0;g<e.length;g++)if((f=h=e[g])&&!(f.length<this.minlength||f.length>this.maxlength))if(c)d.push(f);else if(!this.filter||("function"===typeof this.filter?this.filter(f):!this.filter.has(f))){if(this.cache&&f.length<=this.H)if(this.D){var k=this.C.get(f);if(k||""===k){k&&d.push(k);continue}}else this.D=setTimeout(K,50,this);this.stemmer&&2<f.length&&(this.N||(this.N=new RegExp("(?!^)("+this.A+")$")),f=f.replace(this.N,function(q){return b.stemmer.get(q)}));
-if(f&&(this.mapper||this.dedupe&&1<f.length)){k="";for(var l=0,m="",n=void 0,p=void 0;l<f.length;l++)n=f.charAt(l),n===m&&this.dedupe||((p=this.mapper&&this.mapper.get(n))||""===p?p===m&&this.dedupe||!(m=p)||(k+=p):k+=m=n);f=k}this.matcher&&1<f.length&&(this.M||(this.M=new RegExp("("+this.h+")","g")),f=f.replace(this.M,function(q){return b.matcher.get(q)}));if(f&&this.replacer)for(k=0;f&&k<this.replacer.length;k+=2)f=f.replace(this.replacer[k],this.replacer[k+1]);this.cache&&h.length<=this.H&&(this.C.set(h,
+d=[],e=this.split||""===this.split?a.split(this.split):a,g=0,f=void 0,h=void 0;g<e.length;g++)if((f=h=e[g])&&!(f.length<this.minlength||f.length>this.maxlength))if(c)d.push(f);else if(!this.filter||("function"===typeof this.filter?this.filter(f):!this.filter.has(f))){if(this.cache&&f.length<=this.H)if(this.D){var k=this.C.get(f);if(k||""===k){k&&d.push(k);continue}}else this.D=setTimeout(K,50,this);this.stemmer&&2<f.length&&(this.N||(this.N=new RegExp("(?!^)("+this.A+")$")),f=f.replace(this.N,function(p){return b.stemmer.get(p)}));
+if(f&&(this.mapper||this.dedupe&&1<f.length)){k="";for(var l=0,m="",n=void 0,q=void 0;l<f.length;l++)n=f.charAt(l),n===m&&this.dedupe||((q=this.mapper&&this.mapper.get(n))||""===q?q===m&&this.dedupe||!(m=q)||(k+=q):k+=m=n);f=k}this.matcher&&1<f.length&&(this.M||(this.M=new RegExp("("+this.h+")","g")),f=f.replace(this.M,function(p){return b.matcher.get(p)}));if(f&&this.replacer)for(k=0;f&&k<this.replacer.length;k+=2)f=f.replace(this.replacer[k],this.replacer[k+1]);this.cache&&h.length<=this.H&&(this.C.set(h,
 f),this.C.size>this.T&&(this.C.clear(),this.H=this.H/1.1|0));f&&d.push(f)}this.finalize&&(d=this.finalize(d)||d);this.cache&&a.length<=this.G&&(this.B.set(a,d),this.B.size>this.T&&(this.B.clear(),this.G=this.G/1.1|0));return d};function K(a){a.D=null;a.B.clear();a.C.clear()};var Ha,Ia;
 function Ja(a){var b,c,d,e,g,f;return ta(function(h){switch(h.h){case 1:a=a.data;b=a.task;c=a.id;d=a.args;switch(b){case "init":Ia=a.options||{};(e=a.factory)?(Function("return "+e)()(self),Ha=new self.FlexSearch.Index(Ia),delete self.FlexSearch):Ha=new M(Ia);postMessage({id:c});break;default:h.h=2;return}h.h=0;break;case 2:"export"===b&&(d[1]?(d[0]=Ia.export,d[2]=0,d[3]=1):d=null);if("import"===b){if(!d[0]){h.h=5;break}return D(h,Ia.import.call(Ha,d[0]),9)}g=d&&Ha[b].apply(Ha,d);if(!g||!g.then){h.h=
-5;break}return D(h,g,7);case 7:g=h.D;h.h=5;break;case 9:f=h.D,Ha.import(d[0],f);case 5:postMessage("search"===b?{id:c,msg:g}:{id:c}),h.h=0}})};function Ka(a){Ma.call(a,"add");Ma.call(a,"append");Ma.call(a,"search");Ma.call(a,"update");Ma.call(a,"remove")}var Na,Oa,Pa;function Qa(){Na=Pa=0}
-function Ma(a){this[a+"Async"]=function(){var b=arguments,c=b[b.length-1];if("function"===typeof c){var d=c;delete b[b.length-1]}Na?Pa||(Pa=Date.now()-Oa>=this.priority*this.priority*3):(Na=setTimeout(Qa,0),Oa=Date.now());if(Pa){var e=this;return new Promise(function(f){setTimeout(function(){f(e[a+"Async"].apply(e,b))},0)})}var g=this[a].apply(this,b);c=g.then?g:new Promise(function(f){return f(g)});d&&c.then(d);return c}};var Ra=0;
+5;break}return D(h,g,7);case 7:g=h.D;h.h=5;break;case 9:f=h.D,Ha.import(d[0],f);case 5:postMessage("search"===b?{id:c,msg:g}:{id:c}),h.h=0}})};function Ka(a){La.call(a,"add");La.call(a,"append");La.call(a,"search");La.call(a,"update");La.call(a,"remove")}var Na,Oa,Pa;function Qa(){Na=Pa=0}
+function La(a){this[a+"Async"]=function(){var b=arguments,c=b[b.length-1];if("function"===typeof c){var d=c;delete b[b.length-1]}Na?Pa||(Pa=Date.now()-Oa>=this.priority*this.priority*3):(Na=setTimeout(Qa,0),Oa=Date.now());if(Pa){var e=this;return new Promise(function(f){setTimeout(function(){f(e[a+"Async"].apply(e,b))},0)})}var g=this[a].apply(this,b);c=g.then?g:new Promise(function(f){return f(g)});d&&c.then(d);return c}};var Ra=0;
 function Sa(a){function b(f){function h(k){k=k.data||k;var l=k.id,m=l&&e.h[l];m&&(m(k.msg),delete e.h[l])}this.worker=f;this.h=I();if(this.worker){d?this.worker.on("message",h):this.worker.onmessage=h;if(a.config)return new Promise(function(k){e.h[++Ra]=function(){k(e);1E9<Ra&&(Ra=0)};e.worker.postMessage({id:Ra,task:"init",factory:c,options:a})});this.worker.postMessage({task:"init",factory:c,options:a});this.priority=a.priority||4;return this}}a=void 0===a?{}:a;if(!this||this.constructor!==Sa)return new Sa(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=Ta(c,d,a.worker);return g.then?g.then(function(f){return b.call(e,f)}):b.call(this,g)}O("add");O("append");O("search");O("update");O("remove");O("clear");O("export");O("import");Ka(Sa.prototype);
 function O(a){Sa.prototype[a]=function(){var b=this,c=[].slice.call(arguments),d=c[c.length-1];if("function"===typeof d){var e=d;c.pop()}d=new Promise(function(g){"export"===a&&"function"===typeof c[0]&&(c[0]=null);b.h[++Ra]=g;b.worker.postMessage({task:a,id:Ra,args:c})});return e?(d.then(e),this):d}}
@@ -68,32 +68,32 @@ u.values=T.prototype.values=function eb(){var b,c=this,d,e,g;return ra(eb,functi
 u.keys=T.prototype.keys=function fb(){var b,c=this,d,e,g;return ra(fb,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 D(f,g,6);case 6:e=d.next(),f.h=5}})};
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+u.mount=function(a){var b=this.field;if(this.tag)for(var c=0,d=void 0;c<this.aa.length;c++){d=this.aa[c];var e=void 0;this.index.set(d,e=new M({},this.reg));b===this.field&&(b=b.slice(0));b.push(d);e.tag=this.tag.get(d)}c=[];d={db:a.db,type:a.type,fastupdate:a.fastupdate};e=0;var g=void 0;for(g=void 0;e<b.length;e++){d.field=g=b[e];g=this.index.get(g);var f=new a.constructor(a.id,d);f.id=a.id;c[e]=f.mount(g);g.document=!0;e?g.bypass=!0:g.store=this.store}var h=this;return this.db=Promise.all(c).then(function(){h.db=
+!0})};u.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());for(g=e.next();!g.done;g=e.next())f=g.value,d.push(f.commit(a,b));return D(h,Promise.all(d),2)}c.reg.clear();h.h=0})};u.destroy=function(){for(var a=[],b=y(this.index.values()),c=b.next();!c.done;c=b.next())a.push(c.value.destroy());return Promise.all(a)};
+function yb(a,b){var c=new Map,d=b.index||b.field||b;J(d)&&(d=[d]);for(var e=0,g,f=void 0;e<d.length;e++){g=d[e];J(g)||(f=g,g=g.field);f=xa(f)?Object.assign({},a,f):a;if(this.worker){var h=new Sa(f);h.encoder=f.encoder;c.set(g,h)}this.worker||c.set(g,new M(f,this.reg));f.custom?this.L[e]=f.custom:(this.L[e]=xb(g,this.S),f.filter&&("string"===typeof this.L[e]&&(this.L[e]=new String(this.L[e])),this.L[e].R=f.filter));this.field[e]=g}if(this.I)for(a=b.store,J(a)&&(a=[a]),b=0;b<a.length;b++)d=a[b],e=
+d.field||d,d.custom?(this.I[b]=d.custom,d.custom.ja=e):(this.I[b]=xb(e,this.S),d.filter&&("string"===typeof this.I[b]&&(this.I[b]=new String(this.I[b])),this.I[b].R=d.filter));return c}function xb(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]}u.append=function(a,b){return this.add(a,b,!0)};u.update=function(a,b){return this.remove(a).add(a,b)};
 u.remove=function(a){xa(a)&&(a=za(a,this.key));for(var b=y(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()){c=c.value;for(var d=y(c),e=d.next();!e.done;e=d.next()){var g=e.value;e=g[0];g=g[1];var f=g.indexOf(a);-1<f&&(1<g.length?g.splice(f,1):c.delete(e))}}this.store&&this.store.delete(a);this.reg.delete(a)}this.cache&&this.cache.remove(a);return this};
 u.clear=function(){for(var a=[],b=y(this.index.values()),c=b.next();!c.done;c=b.next())c=c.value.clear(),c.then&&a.push(c);if(this.tag)for(b=y(this.tag.values()),c=b.next();!c.done;c=b.next())c.value.clear();this.store&&this.store.clear();this.cache&&this.cache.clear();return a.length?Promise.all(a):this};u.contain=function(a){return this.db?this.index.get(this.field[0]).db.has(a):this.reg.has(a)};
 u.cleanup=function(){for(var a=y(this.index.values()),b=a.next();!b.done;b=a.next())b.value.cleanup();return this};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||null}):this.store.get(a)||null};u.set=function(a,b){"object"===typeof a&&(b=a,a=za(b,this.key));this.store.set(a,b);return this};u.searchCache=zb;
@@ -101,13 +101,13 @@ u.export=function(a,b,c,d){c=void 0===c?0:c;d=void 0===d?0:d;if(c<this.field.len
 u.import=function(a,b){var c=a.split(".");"json"===c[c.length-1]&&c.pop();var d=2<c.length?c[0]:"";c=2<c.length?c[2]:c[1];if(this.worker&&d)return this.index.get(d).import(a);if(b){"string"===typeof b&&(b=JSON.parse(b));if(d)return this.index.get(d).import(c,b);switch(c){case "reg":this.fastupdate=!1;this.reg=Za(b,this.reg);for(b=0;b<this.field.length;b++)d=this.index.get(this.field[b]),d.fastupdate=!1,d.reg=this.reg;if(this.worker){b=[];d=y(this.index.values());for(c=d.next();!c.done;c=d.next())b.push(c.value.import(a));
 return Promise.all(b)}break;case "tag":this.tag=Xa(b,this.tag);break;case "doc":this.store=Va(b,this.store)}}};Ka(U.prototype);function zb(a,b,c){var d=("object"===typeof a?""+a.query:a).toLowerCase();this.cache||(this.cache=new X);var e=this.cache.get(d);if(!e){e=this.search(a,b,c);if(e.then){var g=this;e.then(function(f){g.cache.set(d,f);return f})}this.cache.set(d,e)}return e}function X(a){this.limit=a&&!0!==a?a:1E3;this.cache=new Map;this.h=""}X.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)};
 X.prototype.get=function(a){var b=this.cache.get(a);b&&this.h!==a&&(this.cache.delete(a),this.cache.set(this.h=a,b));return b};X.prototype.remove=function(a){for(var b=y(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)}};X.prototype.clear=function(){this.cache.clear();this.h=""};var Ab={normalize:!1,numeric:!1,dedupe:!1};var Bb={};var Cb=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 Db=new Map([["ae","a"],["oe","o"],["sh","s"],["kh","k"],["th","t"],["ph","f"],["pf","f"]]),Eb=[/([^aeo])h(.)/g,"$1$2",/([aeo])h([^aeo]|$)/g,"$1$2",/(.)\1+/g,"$1"];var Fb={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 Gb={Exact:Ab,Default:Bb,Normalize:Bb,LatinBalance:{mapper:Cb},LatinAdvanced:{mapper:Cb,matcher:Db,replacer:Eb},LatinExtra:{mapper:Cb,replacer:Eb.concat([/(?!^)[aeo]/g,""]),matcher:Db},LatinSoundex:{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=Fb[d],g=1,f;g<c.length&&(f=c.charAt(g),"h"===f||"w"===f||!(f=Fb[f])||f===e||(d+=f,e=f,4!==d.length));g++);a[b]=d}}},CJK:{split:""},LatinExact:Ab,LatinDefault:Bb,LatinSimple:Bb};M.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)for(var d=0,e;d<c.length;d++){if(e=c[d])if(2>e.length)e.pop();else{var g=e.indexOf(a);g===c.length-1?e.pop():e.splice(g,1)}}else Hb(this.map,a),this.depth&&Hb(this.ctx,a);b||this.reg.delete(a)}this.db&&(this.commit_task.push({del:a}),this.ca&&Ib(this));this.cache&&this.cache.remove(a);return this};
-function Hb(a,b){var c=0,d="undefined"===typeof b;if(a.constructor===Array)for(var e=0,g=void 0,f;e<a.length;e++){if((g=a[e])&&g.length)if(d)c++;else if(f=g.indexOf(b),0<=f){1<g.length?(g.splice(f,1),c++):delete a[e];break}else c++}else for(d=y(a.entries()),e=d.next();!e.done;e=d.next())g=e.value,e=g[0],(g=Hb(g[1],b))?c+=g:a.delete(e);return c};var Jb={memory:{resolution:1},performance:{resolution:3,fastupdate:!0,context:{depth:1,resolution:1}},match:{tokenize:"forward"},score:{resolution:9,context:{depth:2,resolution:3}}};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){for(var e=I(),g=I(),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):Kb(h,d,k),p="";switch(this.tokenize){case "full":if(2<m){n=0;for(var q;n<m;n++)for(var r=m;r>n;r--)p=l.substring(n,r),q=this.rtl?m-1-n:n,q=this.score?this.score(b,l,k,p,q):Kb(h,d,k,m,q),Lb(this,g,p,
-q,a,c);break}case "bidirectional":case "reverse":if(1<m){for(r=m-1;0<r;r--)p=l[this.rtl?m-1-r:r]+p,q=this.score?this.score(b,l,k,p,r):Kb(h,d,k,m,r),Lb(this,g,p,q,a,c);p=""}case "forward":if(1<m){for(r=0;r<m;r++)p+=l[this.rtl?m-1-r:r],Lb(this,g,p,n,a,c);break}default:if(Lb(this,g,l,n,a,c),f&&1<d&&k<d-1)for(m=I(),p=this.da,n=l,r=Math.min(f+1,this.rtl?k+1:d-k),q=m[n]=1;q<r;q++)if((l=b[this.rtl?d-1-k-q:k+q])&&!m[l]){m[l]=1;var w=this.score?this.score(b,n,k,l,q-1):Kb(p+(d/2>p?0:1),d,k,r-1,q-1),t=this.bidirectional&&
+function Hb(a,b){var c=0,d="undefined"===typeof b;if(a.constructor===Array)for(var e=0,g=void 0,f;e<a.length;e++){if((g=a[e])&&g.length)if(d)c++;else if(f=g.indexOf(b),0<=f){1<g.length?(g.splice(f,1),c++):delete a[e];break}else c++}else for(d=y(a.entries()),e=d.next();!e.done;e=d.next())g=e.value,e=g[0],(g=Hb(g[1],b))?c+=g:a.delete(e);return c};var Jb={memory:{resolution:1},performance:{resolution:3,fastupdate:!0,context:{depth:1,resolution:1}},match:{tokenize:"forward"},score:{resolution:9,context:{depth:2,resolution:3}}};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){for(var e=I(),g=I(),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):Kb(h,d,k),q="";switch(this.tokenize){case "full":if(2<m){n=0;for(var p;n<m;n++)for(var r=m;r>n;r--)q=l.substring(n,r),p=this.rtl?m-1-n:n,p=this.score?this.score(b,l,k,q,p):Kb(h,d,k,m,p),Lb(this,g,q,
+p,a,c);break}case "bidirectional":case "reverse":if(1<m){for(r=m-1;0<r;r--)q=l[this.rtl?m-1-r:r]+q,p=this.score?this.score(b,l,k,q,r):Kb(h,d,k,m,r),Lb(this,g,q,p,a,c);q=""}case "forward":if(1<m){for(r=0;r<m;r++)q+=l[this.rtl?m-1-r:r],Lb(this,g,q,n,a,c);break}default:if(Lb(this,g,l,n,a,c),f&&1<d&&k<d-1)for(m=I(),q=this.da,n=l,r=Math.min(f+1,this.rtl?k+1:d-k),p=m[n]=1;p<r;p++)if((l=b[this.rtl?d-1-k-p:k+p])&&!m[l]){m[l]=1;var w=this.score?this.score(b,n,k,l,p-1):Kb(q+(d/2>q?0:1),d,k,r-1,p-1),t=this.bidirectional&&
 l>n;Lb(this,e,t?n:l,w,a,c,t?l:n)}}}}this.fastupdate||this.reg.add(a)}else b=""}this.db&&(b||this.commit_task.push({del:a}),this.ca&&Ib(this));return this};
 function Lb(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]=I()),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 R(h);if(a.fastupdate)for(c=y(a.reg.values()),g=c.next();!g.done;g=c.next())g=g.value,g.includes(h)&&(g[g.indexOf(h)]=b);k[d]=h=b}h.push(e);a.fastupdate&&((d=a.reg.get(e))?d.push(h):a.reg.set(e,[h]))}}
-function Kb(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};M.prototype.search=function(a,b,c){c||(b||"object"!==typeof a?"object"===typeof b&&(c=b,b=0):(c=a,a=""));var d=[],e=0,g;if(c){a=c.query||a;b=c.limit||b;e=c.offset||0;var f=c.context;var h=c.suggest;var k=(g=!1!==c.resolve)&&c.enrich;var l=c.boost;var m=c.resolution;var n=this.db&&c.tag}else g=this.resolve;var p=this.encoder.encode(a);var q=p.length;b=b||(g?100:0);if(1===q)return Mb.call(this,p[0],"",b,e,g,k,n);f=this.depth&&!1!==f;if(2===q&&f&&!h)return Mb.call(this,p[1],p[0],b,e,g,k,n);var r=I(),
-w=0;if(f){var t=p[0];w=1}m||0===m||(m=t?this.da:this.resolution);if(this.db){if(this.db.search&&(a=this.db.search(this,p,b,e,h,g,k,n),!1!==a))return a;var z=this;return function(){var A,v;return ta(function(x){switch(x.h){case 1:v=A=void 0;case 2:if(!(w<q)){x.h=4;break}v=p[w];if(!v||r[v]){x.h=5;break}r[v]=1;return D(x,Nb(z,v,t,0,0,!1,!1),6);case 6:A=x.D;if(A=Ob(A,d,h,m)){d=A;x.h=4;break}t&&(h&&A&&d.length||(t=v));case 5:h&&t&&w===q-1&&!d.length&&(m=z.resolution,t="",w=-1,r=I());w++;x.h=2;break;case 4:return x.return(Pb(d,
-m,b,e,h,l,g))}})}()}for(c=a=void 0;w<q;w++){if((c=p[w])&&!r[c]){r[c]=1;a=Nb(this,c,t,0,0,!1,!1);if(a=Ob(a,d,h,m)){d=a;break}t&&(h&&a&&d.length||(t=c))}h&&t&&w===q-1&&!d.length&&(m=this.resolution,t="",w=-1,r=I())}return Pb(d,m,b,e,h,l,g)};function Pb(a,b,c,d,e,g,f){var h=a.length,k=a;if(1<h)k=jb(a,b,c,d,e,g,f);else if(1===h)return f?mb.call(null,a[0],c,d):new W(a[0]);return f?k:new W(k)}
+function Kb(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};M.prototype.search=function(a,b,c){c||(b||"object"!==typeof a?"object"===typeof b&&(c=b,b=0):(c=a,a=""));var d=[],e=0,g;if(c){a=c.query||a;b=c.limit||b;e=c.offset||0;var f=c.context;var h=c.suggest;var k=(g=!1!==c.resolve)&&c.enrich;var l=c.boost;var m=c.resolution;var n=this.db&&c.tag}else g=this.resolve;var q=this.encoder.encode(a);var p=q.length;b=b||(g?100:0);if(1===p)return Mb.call(this,q[0],"",b,e,g,k,n);f=this.depth&&!1!==f;if(2===p&&f&&!h)return Mb.call(this,q[1],q[0],b,e,g,k,n);var r=I(),
+w=0;if(f){var t=q[0];w=1}m||0===m||(m=t?this.da:this.resolution);if(this.db){if(this.db.search&&(a=this.db.search(this,q,b,e,h,g,k,n),!1!==a))return a;var z=this;return function(){var A,v;return ta(function(x){switch(x.h){case 1:v=A=void 0;case 2:if(!(w<p)){x.h=4;break}v=q[w];if(!v||r[v]){x.h=5;break}r[v]=1;return D(x,Nb(z,v,t,0,0,!1,!1),6);case 6:A=x.D;if(A=Ob(A,d,h,m)){d=A;x.h=4;break}t&&(h&&A&&d.length||(t=v));case 5:h&&t&&w===p-1&&!d.length&&(m=z.resolution,t="",w=-1,r=I());w++;x.h=2;break;case 4:return x.return(Pb(d,
+m,b,e,h,l,g))}})}()}for(c=a=void 0;w<p;w++){if((c=q[w])&&!r[c]){r[c]=1;a=Nb(this,c,t,0,0,!1,!1);if(a=Ob(a,d,h,m)){d=a;break}t&&(h&&a&&d.length||(t=c))}h&&t&&w===p-1&&!d.length&&(m=this.resolution,t="",w=-1,r=I())}return Pb(d,m,b,e,h,l,g)};function Pb(a,b,c,d,e,g,f){var h=a.length,k=a;if(1<h)k=jb(a,b,c,d,e,g,f);else if(1===h)return f?mb.call(null,a[0],c,d):new W(a[0]);return f?k:new W(k)}
 function Mb(a,b,c,d,e,g,f){a=Nb(this,a,b,c,d,e,g,f);return this.db?a.then(function(h){return e?h||[]:new W(h)}):a&&a.length?e?mb.call(this,a,c,d):new W(a):e?[]:new W}function Ob(a,b,c,d){var e=[];if(a&&a.length){if(a.length<=d){b.push(a);return}for(var g=0,f;g<d;g++)if(f=a[g])e[g]=f;if(e.length){b.push(e);return}}if(!c)return e}function Nb(a,b,c,d,e,g,f,h){var k;c&&(k=a.bidirectional&&b>c)&&(k=c,c=b,b=k);if(a.db)return a.db.get(b,c,d,e,g,f,h);a=c?(a=a.ctx.get(c))&&a.get(b):a.map.get(b);return a};function M(a,b){if(!this||this.constructor!==M)return new M(a);if(a){var c=J(a)?a:a.preset;c&&(a=Object.assign({},Jb[c],a))}else a={};c=a.context;var d=!0===c?{depth:1}:c||{},e=J(a.encoder)?Gb[a.encoder]:a.encode||a.encoder||{};this.encoder=e.encode?e:"object"===typeof e?new Ga(e):{encode:e};this.resolution=a.resolution||9;this.tokenize=c=(c=a.tokenize)&&"default"!==c&&"exact"!==c&&c||"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 S(c):new Map;this.ctx=c?new S(c):new Map;this.reg=b||(this.fastupdate?c?new S(c):new Map:c?new T(c):new Set);this.da=d.resolution||3;this.rtl=e.rtl||a.rtl||!1;this.cache=(c=a.cache||null)&&new X(c);this.resolve=!1!==a.resolve;if(c=a.db)this.db=this.mount(c);this.ca=!1!==a.commit;this.commit_task=[];this.commit_timer=null;this.priority=a.priority||4}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 Ib(a){a.commit_timer||(a.commit_timer=setTimeout(function(){a.commit_timer=null;a.db.commit(a,void 0,void 0)},1))}
@@ -116,18 +116,19 @@ u.cleanup=function(){if(!this.fastupdate)return this;Hb(this.map);this.depth&&Hb
 u.import=function(a,b){if(b)switch("string"===typeof b&&(b=JSON.parse(b)),a=a.split("."),"json"===a[a.length-1]&&a.pop(),3===a.length&&a.shift(),a=1<a.length?a[1]:a[0],a){case "reg":this.fastupdate=!1;this.reg=Za(b,this.reg);break;case "map":this.map=Va(b,this.map);break;case "ctx":this.ctx=Xa(b,this.ctx)}};
 u.serialize=function(a){a=void 0===a?!0:a;var b="",c="",d="";if(this.reg.size){var e;c=y(this.reg.keys());for(var g=c.next();!g.done;g=c.next())g=g.value,e||(e=typeof g),b+=(b?",":"")+("string"===e?'"'+g+'"':g);b="index.reg=new Set(["+b+"]);";c=ab(this.map,e);c="index.map=new Map(["+c+"]);";g=y(this.ctx.entries());for(var f=g.next();!f.done;f=g.next()){var h=f.value;f=h[0];h=ab(h[1],e);h="new Map(["+h+"])";h='["'+f+'",'+h+"]";d+=(d?",":"")+h}d="index.ctx=new Map(["+d+"]);"}return a?"function inject(index){"+
 b+c+d+"}":b+c+d};Ka(M.prototype);var Qb="undefined"!==typeof window&&(window.indexedDB||window.mozIndexedDB||window.webkitIndexedDB||window.msIndexedDB),Rb=["map","ctx","tag","reg","cfg"],Y=I();
-function Sb(a,b){b=void 0===b?{}:b;if(!this)return new Sb(a,b);"object"===typeof a&&(b=a,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.type=b.type;this.fastupdate=this.support_tag_search=!1;this.db=null;this.h={}}u=Sb.prototype;u.mount=function(a){if(!a.encoder)return a.mount(this);a.db=this;return this.open()};
+function Sb(a,b){b=void 0===b?{}:b;if(!this||this.constructor!==Sb)return new Sb(a,b);"object"===typeof a&&(b=a,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.type=b.type;this.fastupdate=this.support_tag_search=!1;this.db=null;this.h={}}u=Sb.prototype;
+u.mount=function(a){if(a.index)return a.mount(this);a.db=this;return this.open()};
 u.open=function(){if(this.db)return this.db;var a=this;navigator.storage&&navigator.storage.persist();Y[a.id]||(Y[a.id]=[]);Y[a.id].push(a.field);var b=Qb.open(a.id,1);b.onupgradeneeded=function(){for(var c=a.db=this.result,d=0,e;d<Rb.length;d++){e=Rb[d];for(var g=0,f;g<Y[a.id].length;g++)f=Y[a.id][g],c.objectStoreNames.contains(e+("reg"!==e?f?":"+f:"":""))||c.createObjectStore(e+("reg"!==e?f?":"+f:"":""))}};return a.db=Z(b,function(c){a.db=c;a.db.onversionchange=function(){a.close()}})};
 u.close=function(){this.db&&this.db.close();this.db=null};u.destroy=function(){var a=Qb.deleteDatabase(this.id);return Z(a)};u.clear=function(){for(var a=[],b=0,c;b<Rb.length;b++){c=Rb[b];for(var d=0,e;d<Y[this.id].length;d++)e=Y[this.id][d],a.push(c+("reg"!==c?e?":"+e:"":""))}b=this.db.transaction(a,"readwrite");for(c=0;c<a.length;c++)b.objectStore(a[c]).clear();return Z(b)};
 u.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")+(this.field?":"+this.field:""),"readonly").objectStore((b?"ctx":"map")+(this.field?":"+this.field:"")).get(b?b+":"+a:a);var f=this;return Z(a).then(function(h){var k=[];if(!h||!h.length)return k;if(e){if(!c&&!d&&1===h.length)return h[0];for(var l=0,m=void 0;l<h.length;l++)if((m=h[l])&&m.length)if(d>=m.length)d-=m.length;else{for(var n=c?d+Math.min(m.length-d,c):m.length,
-p=d;p<n;p++)k.push(m[p]);d=0;if(k.length===c)break}return g?f.enrich(k):k}return h})};u.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"+(this.field?":"+this.field:""),"readonly").objectStore("tag"+(this.field?":"+this.field:"")).get(a);var e=this;return Z(a).then(function(g){if(!g||!g.length||c>=g.length)return[];if(!b&&!c)return g;g=g.slice(c,c+b);return d?e.enrich(g):g})};
+q=d;q<n;q++)k.push(m[q]);d=0;if(k.length===c)break}return g?f.enrich(k):k}return h})};u.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"+(this.field?":"+this.field:""),"readonly").objectStore("tag"+(this.field?":"+this.field:"")).get(a);var e=this;return Z(a).then(function(g){if(!g||!g.length||c>=g.length)return[];if(!b&&!c)return g;g=g.slice(c,c+b);return d?e.enrich(g):g})};
 u.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]=Z(b.get(a[d]));return Promise.all(c).then(function(e){for(var g=0;g<e.length;g++)e[g]={id:a[g],doc:e[g]?JSON.parse(e[g]):null};return e})};u.has=function(a){a=this.db.transaction("reg","readonly").objectStore("reg").getKey(a);return Z(a).then(function(b){return!!b})};u.search=null;u.info=function(){};
 u.transaction=function(a,b,c){a+="reg"!==a?this.field?":"+this.field:"":"";var d=this.h[a+":"+b];if(d)return c.call(this,d);var e=this.db.transaction(a,b);this.h[a+":"+b]=d=e.objectStore(a);var g=c.call(this,d);this.h[a+":"+b]=null;return Z(e).finally(function(){e=d=null;return g})};
 u.commit=function(a,b,c){var d=this,e,g,f;return ta(function(h){switch(h.h){case 1:if(b)return D(h,d.clear(),12);e=a.commit_task;a.commit_task=[];g=0;f=void 0;case 4:if(!(g<e.length)){h.h=6;break}f=e[g];if(!f.clear){e[g]=f.del;h.h=5;break}return D(h,d.clear(),8);case 8:b=!0;h.h=6;break;case 5:g++;h.h=4;break;case 6:if(b){h.h=3;break}c||(e=e.concat(ya(a.reg)));if(!e.length){h.h=10;break}return D(h,d.remove(e),11);case 11:case 10:h.h=3;break;case 12:a.commit_task=[];case 3:return a.reg.size?D(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 function(){var q=this.result,r;if(q&&q.length)for(var w=Math.max(q.length,p.O.length),t=0,z;t<w;t++){if((z=p.O[t])&&z.length){if((r=q[t])&&r.length)for(var A=0;A<z.length;A++)r.push(z[A]);else q[t]=z;r=1}}else q=p.O,r=1;r&&k.put(q,p.Y)}}(n))}),13):h.return();case 13:return D(h,d.transaction("ctx","readwrite",
-function(k){for(var l=y(a.ctx),m=l.next(),n={};!m.done;n={V:void 0},m=l.next()){m=m.value;n.V=m[0];m=y(m[1]);for(var p=m.next(),q={};!p.done;q={P:void 0,Z:void 0},p=m.next())p=p.value,q.Z=p[0],q.P=p[1],q.P.length&&(b?k.put(q.P,n.V+":"+q.Z):k.get(n.V+":"+q.Z).onsuccess=function(r,w){return function(){var t=this.result,z;if(t&&t.length)for(var A=Math.max(t.length,r.P.length),v=0,x;v<A;v++){if((x=r.P[v])&&x.length){if((z=t[v])&&z.length)for(var E=0;E<x.length;E++)z.push(x[E]);else t[v]=x;z=1}}else t=
-r.P,z=1;z&&k.put(t,w.V+":"+r.Z)}}(q,n))}}),14);case 14:if(a.store)return D(h,d.transaction("reg","readwrite",function(k){for(var l=y(a.store),m=l.next();!m.done;m=l.next()){var n=m.value;m=n[0];n=n[1];k.put("object"===typeof n?JSON.stringify(n):1,m)}}),16);if(a.bypass){h.h=16;break}return D(h,d.transaction("reg","readwrite",function(k){for(var l=y(a.reg.keys()),m=l.next();!m.done;m=l.next())k.put(1,m.value)}),16);case 16:if(!a.tag){h.h=20;break}return D(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())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;q=q&&q.length?q.concat(p.X):p.X;k.put(q,p.ba)}}(n))}),20);case 20:a.map.clear(),a.ctx.clear(),a.tag&&a.tag.clear(),a.store&&a.store.clear(),a.document||a.reg.clear(),h.h=0}})};
+"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(q){return function(){var p=this.result,r;if(p&&p.length)for(var w=Math.max(p.length,q.O.length),t=0,z;t<w;t++){if((z=q.O[t])&&z.length){if((r=p[t])&&r.length)for(var A=0;A<z.length;A++)r.push(z[A]);else p[t]=z;r=1}}else p=q.O,r=1;r&&k.put(p,q.Y)}}(n))}),13):h.return();case 13:return D(h,d.transaction("ctx","readwrite",
+function(k){for(var l=y(a.ctx),m=l.next(),n={};!m.done;n={V:void 0},m=l.next()){m=m.value;n.V=m[0];m=y(m[1]);for(var q=m.next(),p={};!q.done;p={P:void 0,Z:void 0},q=m.next())q=q.value,p.Z=q[0],p.P=q[1],p.P.length&&(b?k.put(p.P,n.V+":"+p.Z):k.get(n.V+":"+p.Z).onsuccess=function(r,w){return function(){var t=this.result,z;if(t&&t.length)for(var A=Math.max(t.length,r.P.length),v=0,x;v<A;v++){if((x=r.P[v])&&x.length){if((z=t[v])&&z.length)for(var E=0;E<x.length;E++)z.push(x[E]);else t[v]=x;z=1}}else t=
+r.P,z=1;z&&k.put(t,w.V+":"+r.Z)}}(p,n))}}),14);case 14:if(a.store)return D(h,d.transaction("reg","readwrite",function(k){for(var l=y(a.store),m=l.next();!m.done;m=l.next()){var n=m.value;m=n[0];n=n[1];k.put("object"===typeof n?JSON.stringify(n):1,m)}}),16);if(a.bypass){h.h=16;break}return D(h,d.transaction("reg","readwrite",function(k){for(var l=y(a.reg.keys()),m=l.next();!m.done;m=l.next())k.put(1,m.value)}),16);case 16:if(!a.tag){h.h=20;break}return D(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())m=m.value,n.ba=m[0],n.X=m[1],n.X.length&&(k.get(n.ba).onsuccess=function(q){return function(){var p=this.result;p=p&&p.length?p.concat(q.X):q.X;k.put(p,q.ba)}}(n))}),20);case 20:a.map.clear(),a.ctx.clear(),a.tag&&a.tag.clear(),a.store&&a.store.clear(),a.document||a.reg.clear(),h.h=0}})};
 function Tb(a,b,c){for(var d=a.value,e,g=0,f=0,h;f<d.length;f++){if(h=c?d:d[f]){for(var k=0,l;k<b.length;k++)if(l=b[k],l=h.indexOf(l),0<=l)if(e=1,1<h.length)h.splice(l,1);else{d[f]=[];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(){var c=this.result;c&&Tb(c,a)}}),this.transaction("ctx","readwrite",function(b){b.openCursor().onsuccess=function(){var c=this.result;c&&Tb(c,a)}}),this.transaction("tag","readwrite",function(b){b.openCursor().onsuccess=function(){var c=this.result;c&&Tb(c,a,!0)}}),this.transaction("reg","readwrite",function(b){for(var c=0;c<a.length;c++)b.delete(a[c])})])};
 function Z(a,b){return new Promise(function(c,d){a.onsuccess=a.oncomplete=function(){b&&b(this.result);b=null;c(this.result)};a.onerror=a.onblocked=d;a=null})};var Ub={Index:M,Charset:Gb,Encoder:Ga,Document:U,Worker:Sa,Resolver:W,IndexedDB:Sb,Language:{}},Yb="undefined"!==typeof self?self:"undefined"!==typeof global?global:self,Zb;(Zb=Yb.define)&&Zb.amd?Zb([],function(){return Ub}):"object"===typeof Yb.exports?Yb.exports=Ub:Yb.FlexSearch=Ub;}(this||self));
diff --git a/dist/flexsearch.light.debug.js b/dist/flexsearch.light.debug.js
index 91dcc3a..ad29f98 100644
--- a/dist/flexsearch.light.debug.js
+++ b/dist/flexsearch.light.debug.js
@@ -1,5 +1,5 @@
 /**!
- * FlexSearch.js v0.8.155 (Light/Debug)
+ * FlexSearch.js v0.8.156 (Light/Debug)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
diff --git a/dist/flexsearch.light.min.js b/dist/flexsearch.light.min.js
index 5066a54..a5b4503 100644
--- a/dist/flexsearch.light.min.js
+++ b/dist/flexsearch.light.min.js
@@ -1,5 +1,5 @@
 /**!
- * FlexSearch.js v0.8.155 (Light)
+ * FlexSearch.js v0.8.156 (Light)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
diff --git a/dist/flexsearch.light.module.debug.js b/dist/flexsearch.light.module.debug.js
index 5c75cea..ec7f596 100644
--- a/dist/flexsearch.light.module.debug.js
+++ b/dist/flexsearch.light.module.debug.js
@@ -1,5 +1,5 @@
 /**!
- * FlexSearch.js v0.8.155 (Bundle/Debug)
+ * FlexSearch.js v0.8.156 (Bundle/Debug)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
diff --git a/dist/flexsearch.light.module.min.js b/dist/flexsearch.light.module.min.js
index a06231c..1c2f3ec 100644
--- a/dist/flexsearch.light.module.min.js
+++ b/dist/flexsearch.light.module.min.js
@@ -1,5 +1,5 @@
 /**!
- * FlexSearch.js v0.8.155 (Bundle)
+ * FlexSearch.js v0.8.156 (Bundle)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
diff --git a/dist/module-debug/db/clickhouse/index.js b/dist/module-debug/db/clickhouse/index.js
index f0fd081..5d12d2f 100644
--- a/dist/module-debug/db/clickhouse/index.js
+++ b/dist/module-debug/db/clickhouse/index.js
@@ -55,7 +55,7 @@ let Index;
  */
 
 export default function ClickhouseDB(name, config = {}) {
-    if (!this) {
+    if (!this || this.constructor !== ClickhouseDB) {
         return new ClickhouseDB(name, config);
     }
     if ("object" == typeof name) {
@@ -82,7 +82,7 @@ export default function ClickhouseDB(name, config = {}) {
 
 ClickhouseDB.prototype.mount = function (flexsearch) {
     //if(flexsearch.constructor === Document){
-    if (!flexsearch.encoder) {
+    if (flexsearch.index) {
         return flexsearch.mount(this);
     }
     defaults.resolution = Math.max(flexsearch.resolution, flexsearch.resolution_ctx);
diff --git a/dist/module-debug/db/indexeddb/index.js b/dist/module-debug/db/indexeddb/index.js
index 1f4f651..00c56e5 100644
--- a/dist/module-debug/db/indexeddb/index.js
+++ b/dist/module-debug/db/indexeddb/index.js
@@ -28,7 +28,7 @@ const Index = create_object();
  */
 
 export default function IdxDB(name, config = {}) {
-    if (!this) {
+    if (!this || this.constructor !== IdxDB) {
         return new IdxDB(name, config);
     }
     if ("object" == typeof name) {
@@ -49,7 +49,7 @@ export default function IdxDB(name, config = {}) {
 
 IdxDB.prototype.mount = function (flexsearch) {
     //if(flexsearch.constructor === Document){
-    if (!flexsearch.encoder) {
+    if (flexsearch.index) {
         return flexsearch.mount(this);
     }
     flexsearch.db = this;
diff --git a/dist/module-debug/db/mongodb/index.js b/dist/module-debug/db/mongodb/index.js
index f4ac562..59d4259 100644
--- a/dist/module-debug/db/mongodb/index.js
+++ b/dist/module-debug/db/mongodb/index.js
@@ -25,7 +25,7 @@ let CLIENT,
  */
 
 export default function MongoDB(name, config = {}) {
-    if (!this) {
+    if (!this || this.constructor !== MongoDB) {
         return new MongoDB(name, config);
     }
     if ("object" == typeof name) {
@@ -51,7 +51,7 @@ export default function MongoDB(name, config = {}) {
 
 MongoDB.prototype.mount = function (flexsearch) {
     //if(flexsearch.constructor === Document){
-    if (!flexsearch.encoder) {
+    if (flexsearch.index) {
         return flexsearch.mount(this);
     }
     flexsearch.db = this;
diff --git a/dist/module-debug/db/postgres/index.js b/dist/module-debug/db/postgres/index.js
index f4713df..5efc5ea 100644
--- a/dist/module-debug/db/postgres/index.js
+++ b/dist/module-debug/db/postgres/index.js
@@ -48,7 +48,7 @@ let DB, TRX;
  */
 
 export default function PostgresDB(name, config = {}) {
-    if (!this) {
+    if (!this || this.constructor !== PostgresDB) {
         return new PostgresDB(name, config);
     }
     if ("object" == typeof name) {
@@ -70,7 +70,7 @@ export default function PostgresDB(name, config = {}) {
 
 PostgresDB.prototype.mount = function (flexsearch) {
     //if(flexsearch.constructor === Document){
-    if (!flexsearch.encoder) {
+    if (flexsearch.index) {
         return flexsearch.mount(this);
     }
     flexsearch.db = this;
diff --git a/dist/module-debug/db/redis/index.js b/dist/module-debug/db/redis/index.js
index cdcdeae..46ac29a 100644
--- a/dist/module-debug/db/redis/index.js
+++ b/dist/module-debug/db/redis/index.js
@@ -23,7 +23,7 @@ let DB, TRX;
  */
 
 export default function RedisDB(name, config = {}) {
-    if (!this) {
+    if (!this || this.constructor !== RedisDB) {
         return new RedisDB(name, config);
     }
     if ("object" == typeof name) {
@@ -50,7 +50,7 @@ export default function RedisDB(name, config = {}) {
 
 RedisDB.prototype.mount = function (flexsearch) {
     //if(flexsearch.constructor === Document){
-    if (!flexsearch.encoder) {
+    if (flexsearch.index) {
         return flexsearch.mount(this);
     }
     flexsearch.db = this;
diff --git a/dist/module-debug/db/sqlite/index.js b/dist/module-debug/db/sqlite/index.js
index 82728eb..d5faa29 100644
--- a/dist/module-debug/db/sqlite/index.js
+++ b/dist/module-debug/db/sqlite/index.js
@@ -45,7 +45,7 @@ const TRX = Object.create(null),
  */
 
 export default function SqliteDB(name, config = {}) {
-    if (!this) {
+    if (!this || this.constructor !== SqliteDB) {
         return new SqliteDB(name, config);
     }
     if ("object" == typeof name) {
@@ -58,7 +58,8 @@ export default function SqliteDB(name, config = {}) {
     //field = "Test-456";
     this.id = config.path || (":memory:" === name ? name : "flexsearch" + (name ? "-" + sanitize(name) : "") + ".sqlite");
     this.field = config.field ? "_" + sanitize(config.field) : "";
-    this.support_tag_search = /* tag? */ /* stringify */ /* stringify */ /* single param */!0 /*await rows.hasNext()*/ /*await rows.hasNext()*/ /*await rows.hasNext()*/;
+    this.support_tag_search = /* tag? */ /* stringify */ /* stringify */ /* single param */!0 /*await rows.hasNext()*/
+    /*await rows.hasNext()*/ /*await rows.hasNext()*/;
     this.db = config.db || Index[this.id] || null;
     this.type = config.type ? types[config.type.toLowerCase()] : "string";
     if (!this.type) throw new Error("Unknown type of ID '" + config.type + "'");
@@ -66,7 +67,7 @@ export default function SqliteDB(name, config = {}) {
 
 SqliteDB.prototype.mount = function (flexsearch) {
     //if(flexsearch.constructor === Document){
-    if (!flexsearch.encoder) {
+    if (flexsearch.index) {
         return flexsearch.mount(this);
     }
     flexsearch.db = this;
diff --git a/dist/module-debug/document.js b/dist/module-debug/document.js
index 423d173..9c95f1a 100644
--- a/dist/module-debug/document.js
+++ b/dist/module-debug/document.js
@@ -6,10 +6,11 @@
  * https://github.com/nextapps-de/flexsearch
  */
 
-import { IndexOptions, DocumentOptions, DocumentDescriptor, FieldOptions, StoreOptions } from "./type.js";
+import { IndexOptions, DocumentOptions, DocumentDescriptor, FieldOptions, StoreOptions, EncoderOptions } from "./type.js";
 import StorageInterface from "./db/interface.js";
 import Index from "./index.js";
 import WorkerIndex from "./worker.js";
+import Encoder from "./encoder.js";
 import Cache, { searchCache } from "./cache.js";
 import { is_string, is_object, parse_simple } from "./common.js";
 import apply_async from "./async.js";
@@ -54,18 +55,12 @@ export default function Document(options) {
     // is just a wrapper over .search()
     options.cache = /* suggest */ /* append: */ /* enrich */!1;
 
-    this.worker = options.worker;
+    this.worker = options.worker || !1;
 
     this.priority = options.priority || 4;
 
-    // if(SUPPORT_ASYNC){
-    //     // this switch is used by recall of promise callbacks
-    //     this.async = false;
-    // }
-
     /**
      * @type {Map<string, Index>}
-     * @export
      */
     this.index = parse_descriptor.call(this, options, document);
 
@@ -113,13 +108,27 @@ export default function Document(options) {
         }
         if (promises.length) {
             const self = this;
-            return Promise.all(promises).then(function (promises) {
+            return Promise.all(promises).then(function (result) {
+                const encoder_last = new Map();
                 let count = 0;
                 for (const item of self.index.entries()) {
-                    const key = /** @type {string} */item[0],
-                          index = item[1];
+                    const key = /** @type {string} */item[0];
+                    let index = item[1];
+                    if (index.then) {
+                        // make encoder available for result highlighting
+                        let opt = promises[count].encoder || {},
+                            encoder = encoder_last.get(opt);
+                        // handle shared encoders
 
-                    index.then && self.index.set(key, promises[count++]);
+                        if (!encoder) {
+                            encoder = opt.encode ? opt : new Encoder(opt);
+                            encoder_last.set(opt, encoder);
+                        }
+                        index = result[count];
+                        index.encoder = encoder;
+                        self.index.set(key, index);
+                        count++;
+                    }
                 }
                 return self;
             });
@@ -127,7 +136,6 @@ export default function Document(options) {
     } else {
         if (options.db) {
             this.fastupdate = !1;
-            // think about to return the promise here
             // actually it can be awaited on "await index.db"
             this.mount(options.db);
         }
@@ -136,7 +144,7 @@ export default function Document(options) {
 
 /**
  * @param {!StorageInterface} db
- * @return {Promise<Array<?>>}
+ * @return {Promise<void>}
  */
 Document.prototype.mount = function (db) {
     if (this.worker) {
@@ -195,9 +203,10 @@ Document.prototype.mount = function (db) {
         }
     }
 
-    //this.async = true;
-    this.db = !0;
-    return Promise.all(promises);
+    const self = this;
+    return this.db = Promise.all(promises).then(function () {
+        self.db = !0;
+    });
 };
 
 Document.prototype.commit = async function (replace, append) {
@@ -250,6 +259,8 @@ function parse_descriptor(options, document) {
         if (this.worker) {
             const worker = new WorkerIndex(opt);
             if (worker) {
+                // assign encoder for result highlighting
+                worker.encoder = opt.encoder;
                 // worker could be a promise
                 // it needs to be resolved and swapped later
                 index.set(key, worker);
diff --git a/dist/module-debug/serialize.js b/dist/module-debug/serialize.js
index e92750c..2fb84aa 100644
--- a/dist/module-debug/serialize.js
+++ b/dist/module-debug/serialize.js
@@ -232,7 +232,8 @@ export function importIndex(key, data) {
         case "reg":
 
             // fast update isn't supported by export/import
-            this.fastupdate = /* suggest */ /* append: */ /* enrich */ /* resolve: */!1;
+            this.fastupdate = /* suggest */
+            /* append: */ /* enrich */ /* resolve: */!1;
             this.reg = json_to_reg( /** @type {Array<string|number>} */data, this.reg);
             break;
 
diff --git a/dist/module-min/db/clickhouse/index.js b/dist/module-min/db/clickhouse/index.js
index 9e59122..2e9ce6e 100644
--- a/dist/module-min/db/clickhouse/index.js
+++ b/dist/module-min/db/clickhouse/index.js
@@ -1,4 +1,4 @@
-import{ClickHouse}from"clickhouse";import StorageInterface from"../interface.js";import{concat,toArray}from"../../common.js";const defaults={host:"http://localhost",port:"8123",debug:!1,basicAuth:null,isUseGzip:!1,trimQuery:!1,usePost:!1,format:"json",raw:!1,config:{output_format_json_quote_64bit_integers:0,enable_http_compression:0,database:"default"}},VERSION=1,fields=["map","ctx","tag","reg","cfg"],types={text:"String",char:"String",varchar:"String",string:"String",number:"Int32",numeric:"Int32",integer:"Int32",smallint:"Int16",tinyint:"Int8",mediumint:"Int32",int:"Int32",int8:"Int8",uint8:"UInt8",int16:"Int16",uint16:"UInt16",int32:"Int32",uint32:"UInt32",int64:"Int64",uint64:"UInt64",bigint:"Int64"};function sanitize(a){return a.toLowerCase().replace(/[^a-z0-9_]/g,"")}let Index;export default function ClickhouseDB(a,b={}){if(!this)return new ClickhouseDB(a,b);if("object"==typeof a&&(b=a,a=a.name),a||console.info("Default storage space was used, because a name was not passed."),this.id="flexsearch"+(a?"_"+sanitize(a):""),this.field=b.field?"_"+sanitize(b.field):"",this.type=b.type?types[b.type.toLowerCase()]:"String",!this.type)throw new Error("Unknown type of ID '"+b.type+"'");this.support_tag_search=!0,this.db=Index||(Index=b.db||null),Object.assign(defaults,b),b.database&&(defaults.config.database=b.database),this.db&&delete defaults.db}ClickhouseDB.prototype.mount=function(a){return a.encoder?(defaults.resolution=Math.max(a.resolution,a.resolution_ctx),a.db=this,this.open()):a.mount(this)},ClickhouseDB.prototype.open=async function(){this.db||(this.db=Index||(Index=new ClickHouse(defaults)));const a=await this.db.query(`
+import{ClickHouse}from"clickhouse";import StorageInterface from"../interface.js";import{concat,toArray}from"../../common.js";const defaults={host:"http://localhost",port:"8123",debug:!1,basicAuth:null,isUseGzip:!1,trimQuery:!1,usePost:!1,format:"json",raw:!1,config:{output_format_json_quote_64bit_integers:0,enable_http_compression:0,database:"default"}},VERSION=1,fields=["map","ctx","tag","reg","cfg"],types={text:"String",char:"String",varchar:"String",string:"String",number:"Int32",numeric:"Int32",integer:"Int32",smallint:"Int16",tinyint:"Int8",mediumint:"Int32",int:"Int32",int8:"Int8",uint8:"UInt8",int16:"Int16",uint16:"UInt16",int32:"Int32",uint32:"UInt32",int64:"Int64",uint64:"UInt64",bigint:"Int64"};function sanitize(a){return a.toLowerCase().replace(/[^a-z0-9_]/g,"")}let Index;export default function ClickhouseDB(a,b={}){if(!this||this.constructor!==ClickhouseDB)return new ClickhouseDB(a,b);if("object"==typeof a&&(b=a,a=a.name),a||console.info("Default storage space was used, because a name was not passed."),this.id="flexsearch"+(a?"_"+sanitize(a):""),this.field=b.field?"_"+sanitize(b.field):"",this.type=b.type?types[b.type.toLowerCase()]:"String",!this.type)throw new Error("Unknown type of ID '"+b.type+"'");this.support_tag_search=!0,this.db=Index||(Index=b.db||null),Object.assign(defaults,b),b.database&&(defaults.config.database=b.database),this.db&&delete defaults.db}ClickhouseDB.prototype.mount=function(a){return a.index?a.mount(this):(defaults.resolution=Math.max(a.resolution,a.resolution_ctx),a.db=this,this.open())},ClickhouseDB.prototype.open=async function(){this.db||(this.db=Index||(Index=new ClickHouse(defaults)));const a=await this.db.query(`
         SELECT 1 FROM system.databases WHERE name = '${this.id}';
     `).toPromise();a&&a.length||(await this.db.query(`
             CREATE DATABASE IF NOT EXISTS ${this.id};
diff --git a/dist/module-min/db/indexeddb/index.js b/dist/module-min/db/indexeddb/index.js
index a435512..fe439f4 100644
--- a/dist/module-min/db/indexeddb/index.js
+++ b/dist/module-min/db/indexeddb/index.js
@@ -1 +1 @@
-import{PersistentOptions,SearchResults,EnrichedSearchResults}from"../../type.js";const VERSION=1,IndexedDB="undefined"!=typeof window&&(window.indexedDB||window.mozIndexedDB||window.webkitIndexedDB||window.msIndexedDB),IDBTransaction="undefined"!=typeof window&&(window.IDBTransaction||window.webkitIDBTransaction||window.msIDBTransaction),IDBKeyRange="undefined"!=typeof window&&(window.IDBKeyRange||window.webkitIDBKeyRange||window.msIDBKeyRange),fields=["map","ctx","tag","reg","cfg"];import StorageInterface from"../interface.js";import{create_object,toArray}from"../../common.js";function sanitize(a){return a.toLowerCase().replace(/[^a-z0-9_\-]/g,"")}const Index=create_object();export default function IdxDB(a,b={}){return this?void("object"==typeof a&&(b=a,a=a.name),!a&&console.info("Default storage space was used, because a name was not passed."),this.id="flexsearch"+(a?":"+sanitize(a):""),this.field=b.field?sanitize(b.field):"",this.type=b.type,this.support_tag_search=!1,this.fastupdate=!1,this.db=null,this.trx={}):new IdxDB(a,b)}IdxDB.prototype.mount=function(a){return a.encoder?(a.db=this,this.open()):a.mount(this)},IdxDB.prototype.open=function(){if(this.db)return this.db;let a=this;navigator.storage&&navigator.storage.persist(),Index[a.id]||(Index[a.id]=[]),Index[a.id].push(a.field);const b=IndexedDB.open(a.id,VERSION);return b.onupgradeneeded=function(){const b=a.db=this.result;for(let c,d=0;d<fields.length;d++){c=fields[d];for(let d,e=0;e<Index[a.id].length;e++)d=Index[a.id][e],b.objectStoreNames.contains(c+("reg"===c?"":d?":"+d:""))||b.createObjectStore(c+("reg"===c?"":d?":"+d:""))}},a.db=promisfy(b,function(b){a.db=b,a.db.onversionchange=function(){a.close()}})},IdxDB.prototype.close=function(){this.db&&this.db.close(),this.db=null},IdxDB.prototype.destroy=function(){const a=IndexedDB.deleteDatabase(this.id);return promisfy(a)},IdxDB.prototype.clear=function(){const a=[];for(let b,c=0;c<fields.length;c++){b=fields[c];for(let c,d=0;d<Index[this.id].length;d++)c=Index[this.id][d],a.push(b+("reg"===b?"":c?":"+c:""))}const b=this.db.transaction(a,"readwrite");for(let c=0;c<a.length;c++)b.objectStore(a[c]).clear();return promisfy(b)},IdxDB.prototype.get=function(a,b,c=0,d=0,e=!0,f=!1){const g=this.db.transaction((b?"ctx":"map")+(this.field?":"+this.field:""),"readonly"),h=g.objectStore((b?"ctx":"map")+(this.field?":"+this.field:"")),i=h.get(b?b+":"+a:a),j=this;return promisfy(i).then(function(a){let b=[];if(!a||!a.length)return b;if(e){if(!c&&!d&&1===a.length)return a[0];for(let e,f=0;f<a.length;f++)if((e=a[f])&&e.length){if(d>=e.length){d-=e.length;continue}const a=c?d+Math.min(e.length-d,c):e.length;for(let c=d;c<a;c++)b.push(e[c]);if(d=0,b.length===c)break}return f?j.enrich(b):b}return a})},IdxDB.prototype.tag=function(a,b=0,c=0,d=!1){const e=this.db.transaction("tag"+(this.field?":"+this.field:""),"readonly"),f=e.objectStore("tag"+(this.field?":"+this.field:"")),g=f.get(a),h=this;return promisfy(g).then(function(a){if(!a||!a.length||c>=a.length)return[];if(!b&&!c)return a;const e=a.slice(c,c+b);return d?h.enrich(e):e})},IdxDB.prototype.enrich=function(a){"object"!=typeof a&&(a=[a]);const b=this.db.transaction("reg","readonly"),c=b.objectStore("reg"),d=[];for(let b=0;b<a.length;b++)d[b]=promisfy(c.get(a[b]));return Promise.all(d).then(function(b){for(let c=0;c<b.length;c++)b[c]={id:a[c],doc:b[c]?JSON.parse(b[c]):null};return b})},IdxDB.prototype.has=function(a){const b=this.db.transaction("reg","readonly"),c=b.objectStore("reg"),d=c.getKey(a);return promisfy(d).then(function(a){return!!a})},IdxDB.prototype.search=null,IdxDB.prototype.info=function(){},IdxDB.prototype.transaction=function(a,b,c){const d=a+("reg"===a?"":this.field?":"+this.field:"");let e=this.trx[d+":"+b];if(e)return c.call(this,e);let f=this.db.transaction(d,b);this.trx[d+":"+b]=e=f.objectStore(d);const g=c.call(this,e);return this.trx[d+":"+b]=null,promisfy(f).finally(function(){return f=e=null,g})},IdxDB.prototype.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 a,c=0;c<d.length;c++)if(a=d[c],a.clear){await this.clear(),b=!0;break}else d[c]=a.del;b||(!c&&(d=d.concat(toArray(a.reg))),d.length&&(await this.remove(d)))}a.reg.size&&(await this.transaction("map","readwrite",function(c){for(const d of a.map){const a=d[0],e=d[1];if(e.length){if(b){c.put(e,a);continue}c.get(a).onsuccess=function(){let b,d=this.result;if(d&&d.length){const a=Math.max(d.length,e.length);for(let c,f,g=0;g<a;g++)if(f=e[g],f&&f.length)if(c=d[g],c&&c.length){for(let a=0;a<f.length;a++)c.push(f[a]);b=1}else d[g]=f,b=1}else d=e,b=1;b&&c.put(d,a)}}}}),await this.transaction("ctx","readwrite",function(c){for(const d of a.ctx){const a=d[0],e=d[1];for(const d of e){const e=d[0],f=d[1];if(f.length){if(b){c.put(f,a+":"+e);continue}c.get(a+":"+e).onsuccess=function(){let b,d=this.result;if(d&&d.length){const a=Math.max(d.length,f.length);for(let c,e,g=0;g<a;g++)if(e=f[g],e&&e.length)if(c=d[g],c&&c.length){for(let a=0;a<e.length;a++)c.push(e[a]);b=1}else d[g]=e,b=1}else d=f,b=1;b&&c.put(d,a+":"+e)}}}}}),a.store?await this.transaction("reg","readwrite",function(b){for(const c of a.store){const a=c[0],d=c[1];b.put("object"==typeof d?JSON.stringify(d):1,a)}}):!a.bypass&&(await this.transaction("reg","readwrite",function(b){for(const c of a.reg.keys())b.put(1,c)})),a.tag&&(await this.transaction("tag","readwrite",function(b){for(const c of a.tag){const a=c[0],d=c[1];d.length&&(b.get(a).onsuccess=function(){let c=this.result;c=c&&c.length?c.concat(d):d,b.put(c,a)})}})),a.map.clear(),a.ctx.clear(),a.tag&&a.tag.clear(),a.store&&a.store.clear(),a.document||a.reg.clear())};function handle(a,b,c){const d=a.value;let e,f=0;for(let g,h=0;h<d.length;h++){if(g=c?d:d[h]){for(let a,c,f=0;f<b.length;f++)if(c=b[f],a=g.indexOf(c),0<=a)if(e=1,1<g.length)g.splice(a,1);else{d[h]=[];break}f+=g.length}if(c)break}f?e&&a.update(d):a.delete(),a.continue()}IdxDB.prototype.remove=function(a){const b=this;return"object"!=typeof a&&(a=[a]),Promise.all([b.transaction("map","readwrite",function(b){b.openCursor().onsuccess=function(){const b=this.result;b&&handle(b,a)}}),b.transaction("ctx","readwrite",function(b){b.openCursor().onsuccess=function(){const b=this.result;b&&handle(b,a)}}),b.transaction("tag","readwrite",function(b){b.openCursor().onsuccess=function(){const b=this.result;b&&handle(b,a,!0)}}),b.transaction("reg","readwrite",function(b){for(let c=0;c<a.length;c++)b.delete(a[c])})])};function promisfy(a,b){return new Promise((c,d)=>{a.onsuccess=a.oncomplete=function(){b&&b(this.result),b=null,c(this.result)},a.onerror=a.onblocked=d,a=null})}
\ No newline at end of file
+import{PersistentOptions,SearchResults,EnrichedSearchResults}from"../../type.js";const VERSION=1,IndexedDB="undefined"!=typeof window&&(window.indexedDB||window.mozIndexedDB||window.webkitIndexedDB||window.msIndexedDB),IDBTransaction="undefined"!=typeof window&&(window.IDBTransaction||window.webkitIDBTransaction||window.msIDBTransaction),IDBKeyRange="undefined"!=typeof window&&(window.IDBKeyRange||window.webkitIDBKeyRange||window.msIDBKeyRange),fields=["map","ctx","tag","reg","cfg"];import StorageInterface from"../interface.js";import{create_object,toArray}from"../../common.js";function sanitize(a){return a.toLowerCase().replace(/[^a-z0-9_\-]/g,"")}const Index=create_object();export default function IdxDB(a,b={}){return this&&this.constructor===IdxDB?void("object"==typeof a&&(b=a,a=a.name),!a&&console.info("Default storage space was used, because a name was not passed."),this.id="flexsearch"+(a?":"+sanitize(a):""),this.field=b.field?sanitize(b.field):"",this.type=b.type,this.support_tag_search=!1,this.fastupdate=!1,this.db=null,this.trx={}):new IdxDB(a,b)}IdxDB.prototype.mount=function(a){return a.index?a.mount(this):(a.db=this,this.open())},IdxDB.prototype.open=function(){if(this.db)return this.db;let a=this;navigator.storage&&navigator.storage.persist(),Index[a.id]||(Index[a.id]=[]),Index[a.id].push(a.field);const b=IndexedDB.open(a.id,VERSION);return b.onupgradeneeded=function(){const b=a.db=this.result;for(let c,d=0;d<fields.length;d++){c=fields[d];for(let d,e=0;e<Index[a.id].length;e++)d=Index[a.id][e],b.objectStoreNames.contains(c+("reg"===c?"":d?":"+d:""))||b.createObjectStore(c+("reg"===c?"":d?":"+d:""))}},a.db=promisfy(b,function(b){a.db=b,a.db.onversionchange=function(){a.close()}})},IdxDB.prototype.close=function(){this.db&&this.db.close(),this.db=null},IdxDB.prototype.destroy=function(){const a=IndexedDB.deleteDatabase(this.id);return promisfy(a)},IdxDB.prototype.clear=function(){const a=[];for(let b,c=0;c<fields.length;c++){b=fields[c];for(let c,d=0;d<Index[this.id].length;d++)c=Index[this.id][d],a.push(b+("reg"===b?"":c?":"+c:""))}const b=this.db.transaction(a,"readwrite");for(let c=0;c<a.length;c++)b.objectStore(a[c]).clear();return promisfy(b)},IdxDB.prototype.get=function(a,b,c=0,d=0,e=!0,f=!1){const g=this.db.transaction((b?"ctx":"map")+(this.field?":"+this.field:""),"readonly"),h=g.objectStore((b?"ctx":"map")+(this.field?":"+this.field:"")),i=h.get(b?b+":"+a:a),j=this;return promisfy(i).then(function(a){let b=[];if(!a||!a.length)return b;if(e){if(!c&&!d&&1===a.length)return a[0];for(let e,f=0;f<a.length;f++)if((e=a[f])&&e.length){if(d>=e.length){d-=e.length;continue}const a=c?d+Math.min(e.length-d,c):e.length;for(let c=d;c<a;c++)b.push(e[c]);if(d=0,b.length===c)break}return f?j.enrich(b):b}return a})},IdxDB.prototype.tag=function(a,b=0,c=0,d=!1){const e=this.db.transaction("tag"+(this.field?":"+this.field:""),"readonly"),f=e.objectStore("tag"+(this.field?":"+this.field:"")),g=f.get(a),h=this;return promisfy(g).then(function(a){if(!a||!a.length||c>=a.length)return[];if(!b&&!c)return a;const e=a.slice(c,c+b);return d?h.enrich(e):e})},IdxDB.prototype.enrich=function(a){"object"!=typeof a&&(a=[a]);const b=this.db.transaction("reg","readonly"),c=b.objectStore("reg"),d=[];for(let b=0;b<a.length;b++)d[b]=promisfy(c.get(a[b]));return Promise.all(d).then(function(b){for(let c=0;c<b.length;c++)b[c]={id:a[c],doc:b[c]?JSON.parse(b[c]):null};return b})},IdxDB.prototype.has=function(a){const b=this.db.transaction("reg","readonly"),c=b.objectStore("reg"),d=c.getKey(a);return promisfy(d).then(function(a){return!!a})},IdxDB.prototype.search=null,IdxDB.prototype.info=function(){},IdxDB.prototype.transaction=function(a,b,c){const d=a+("reg"===a?"":this.field?":"+this.field:"");let e=this.trx[d+":"+b];if(e)return c.call(this,e);let f=this.db.transaction(d,b);this.trx[d+":"+b]=e=f.objectStore(d);const g=c.call(this,e);return this.trx[d+":"+b]=null,promisfy(f).finally(function(){return f=e=null,g})},IdxDB.prototype.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 a,c=0;c<d.length;c++)if(a=d[c],a.clear){await this.clear(),b=!0;break}else d[c]=a.del;b||(!c&&(d=d.concat(toArray(a.reg))),d.length&&(await this.remove(d)))}a.reg.size&&(await this.transaction("map","readwrite",function(c){for(const d of a.map){const a=d[0],e=d[1];if(e.length){if(b){c.put(e,a);continue}c.get(a).onsuccess=function(){let b,d=this.result;if(d&&d.length){const a=Math.max(d.length,e.length);for(let c,f,g=0;g<a;g++)if(f=e[g],f&&f.length)if(c=d[g],c&&c.length){for(let a=0;a<f.length;a++)c.push(f[a]);b=1}else d[g]=f,b=1}else d=e,b=1;b&&c.put(d,a)}}}}),await this.transaction("ctx","readwrite",function(c){for(const d of a.ctx){const a=d[0],e=d[1];for(const d of e){const e=d[0],f=d[1];if(f.length){if(b){c.put(f,a+":"+e);continue}c.get(a+":"+e).onsuccess=function(){let b,d=this.result;if(d&&d.length){const a=Math.max(d.length,f.length);for(let c,e,g=0;g<a;g++)if(e=f[g],e&&e.length)if(c=d[g],c&&c.length){for(let a=0;a<e.length;a++)c.push(e[a]);b=1}else d[g]=e,b=1}else d=f,b=1;b&&c.put(d,a+":"+e)}}}}}),a.store?await this.transaction("reg","readwrite",function(b){for(const c of a.store){const a=c[0],d=c[1];b.put("object"==typeof d?JSON.stringify(d):1,a)}}):!a.bypass&&(await this.transaction("reg","readwrite",function(b){for(const c of a.reg.keys())b.put(1,c)})),a.tag&&(await this.transaction("tag","readwrite",function(b){for(const c of a.tag){const a=c[0],d=c[1];d.length&&(b.get(a).onsuccess=function(){let c=this.result;c=c&&c.length?c.concat(d):d,b.put(c,a)})}})),a.map.clear(),a.ctx.clear(),a.tag&&a.tag.clear(),a.store&&a.store.clear(),a.document||a.reg.clear())};function handle(a,b,c){const d=a.value;let e,f=0;for(let g,h=0;h<d.length;h++){if(g=c?d:d[h]){for(let a,c,f=0;f<b.length;f++)if(c=b[f],a=g.indexOf(c),0<=a)if(e=1,1<g.length)g.splice(a,1);else{d[h]=[];break}f+=g.length}if(c)break}f?e&&a.update(d):a.delete(),a.continue()}IdxDB.prototype.remove=function(a){const b=this;return"object"!=typeof a&&(a=[a]),Promise.all([b.transaction("map","readwrite",function(b){b.openCursor().onsuccess=function(){const b=this.result;b&&handle(b,a)}}),b.transaction("ctx","readwrite",function(b){b.openCursor().onsuccess=function(){const b=this.result;b&&handle(b,a)}}),b.transaction("tag","readwrite",function(b){b.openCursor().onsuccess=function(){const b=this.result;b&&handle(b,a,!0)}}),b.transaction("reg","readwrite",function(b){for(let c=0;c<a.length;c++)b.delete(a[c])})])};function promisfy(a,b){return new Promise((c,d)=>{a.onsuccess=a.oncomplete=function(){b&&b(this.result),b=null,c(this.result)},a.onerror=a.onblocked=d,a=null})}
\ No newline at end of file
diff --git a/dist/module-min/db/mongodb/index.js b/dist/module-min/db/mongodb/index.js
index 0889c88..9f343dd 100644
--- a/dist/module-min/db/mongodb/index.js
+++ b/dist/module-min/db/mongodb/index.js
@@ -1 +1 @@
-import{MongoClient}from"mongodb";const defaults={host:"localhost",port:"27017",user:null,pass:null},VERSION=1,fields=["map","ctx","tag","reg","cfg"];import StorageInterface from"../interface.js";import{toArray}from"../../common.js";function sanitize(a){return a.toLowerCase().replace(/[^a-z0-9_\-]/g,"")}let CLIENT,Index=Object.create(null);export default function MongoDB(a,b={}){return this?void("object"==typeof a&&(b=a,a=a.name),!a&&console.info("Default storage space was used, because a name was not passed."),this.id="flexsearch"+(a?"-"+sanitize(a):""),this.field=b.field?"-"+sanitize(b.field):"",this.type=b.type||"",this.db=b.db||Index[this.id]||CLIENT||null,this.trx=!1,this.support_tag_search=!0,Object.assign(defaults,b),this.db&&delete defaults.db):new MongoDB(a,b)}MongoDB.prototype.mount=function(a){return a.encoder?(a.db=this,this.open()):a.mount(this)};async function createCollection(a,b,c){"map"===b?(await a.createCollection("map"+c),await a.collection("map"+c).createIndex({key:1}),await a.collection("map"+c).createIndex({id:1})):"ctx"===b?(await a.createCollection("ctx"+c),await a.collection("ctx"+c).createIndex({ctx:1,key:1}),await a.collection("ctx"+c).createIndex({id:1})):"tag"===b?(await a.createCollection("tag"+c),await a.collection("tag"+c).createIndex({tag:1}),await a.collection("tag"+c).createIndex({id:1})):"reg"===b?(await a.createCollection("reg"),await a.collection("reg").createIndex({id:1})):"cfg"===b?await a.createCollection("cfg"+c):void 0}MongoDB.prototype.open=async function(){if(!this.db&&!(this.db=Index[this.id])&&!(this.db=CLIENT)){let a=defaults.url;a||(a=defaults.user?`mongodb://${defaults.user}:${defaults.pass}@${defaults.host}:${defaults.port}`:`mongodb://${defaults.host}:${defaults.port}`),this.db=CLIENT=new MongoClient(a),await this.db.connect()}this.db.db&&(this.db=Index[this.id]=this.db.db(this.id));const a=await this.db.listCollections().toArray();for(let b,c=0;c<fields.length;c++){b=!1;for(let d=0;d<a.length;d++)if(a[d].name===fields[c]+("reg"===fields[c]?"":this.field)){b=!0;break}b||(await createCollection(this.db,fields[c],this.field))}return this.db},MongoDB.prototype.close=function(){return this.db=CLIENT=null,Index[this.id]=null,this},MongoDB.prototype.destroy=function(){return Promise.all([this.db.dropCollection("map"+this.field),this.db.dropCollection("ctx"+this.field),this.db.dropCollection("tag"+this.field),this.db.dropCollection("cfg"+this.field),this.db.dropCollection("reg")])};async function clear(a){await this.db.dropCollection(a),await createCollection(this.db,a,this.field)}MongoDB.prototype.clear=function(){return Promise.all([clear.call(this,"map"+this.field),clear.call(this,"ctx"+this.field),clear.call(this,"tag"+this.field),clear.call(this,"cfg"+this.field),clear.call(this,"reg")])};function create_result(a,b,c){if(b){if(!c)for(let b=0;b<a.length;b++)a[b]=a[b].id;return a}else{const b=[];for(let d,e=0;e<a.length;e++)d=a[e],b[d.res]||(b[d.res]=[]),b[d.res].push(c?d:d.id);return b}}MongoDB.prototype.get=async function(a,b,c=0,d=0,e=!0,f=!1,g){let h,i=b?{ctx:b,key:a}:{key:a};if(!f&&!g)h=await this.db.collection((b?"ctx":"map")+this.field).find(i,{projection:{_id:0,res:1,id:1},limit:c,skip:d}).toArray();else{const a={_id:0,id:1},j=[{$match:i}];if(e||(a.res=1),f&&(a.doc="$doc.doc",j.push({$lookup:{from:"reg",localField:"id",foreignField:"id",as:"doc"}},{$unwind:{path:"$doc",preserveNullAndEmptyArrays:!0}})),g){const b={};for(let c=0,d=1;c<g.length;c+=2)a["tag"+d]="$tag"+d+".tag",b["tag"+d]=g[c+1],j.push({$lookup:{from:"tag-"+sanitize(g[c]),localField:"id",foreignField:"id",as:"tag"+d}}),d++;j.push({$project:a},{$match:b},{$project:{id:1,doc:1}})}else j.push({$project:a});j.push({$sort:{res:1}},{$skip:d},{$limit:c}),h=[];for(const a=await this.db.collection((b?"ctx":"map")+this.field).aggregate(j);;){const b=await a.next();if(b)h.push(b);else break}}return create_result(h,e,f)},MongoDB.prototype.tag=async function(a,b=0,c=0,d=!1){if(!d){const d=await this.db.collection("tag"+this.field).find({tag:a},{projection:{_id:0,id:1},limit:b,skip:c}).toArray();return create_result(d,!0,!1)}else{const d=[{$match:{tag:a}},{$skip:c},{$limit:b},{$lookup:{from:"reg",localField:"id",foreignField:"id",as:"doc"}},{$project:{_id:0,id:1,doc:"$doc.doc"}},{$unwind:{path:"$doc",preserveNullAndEmptyArrays:!0}}];let e=[];for(const a=await this.db.collection("tag"+this.field).aggregate(d);;){const b=await a.next();if(b)e.push(b);else break}return e}},MongoDB.prototype.enrich=function(a){return"object"!=typeof a&&(a=[a]),this.db.collection("reg").find({id:{$in:a}},{projection:{_id:0,id:1,doc:1}}).toArray()},MongoDB.prototype.has=function(a){return this.db.collection("reg").countDocuments({id:a},{limit:1}).then(function(a){return!!a})},MongoDB.prototype.search=async function(a,b,c=100,d=0,e=!1,f=!0,g=!1,h){let i,j=[];if(1<b.length&&a.depth){let j,k=[],l=b[0];for(let c=1;c<b.length;c++){j=b[c];const d=a.bidirectional&&j>l;k.push({ctx:d?j:l,key:d?l:j}),l=j}const m={_id:1};f||(m.res=1),g&&(m.doc=1);const n=[{$match:{$or:k}},{$group:{_id:"$id",count:{$sum:1},res:e?{$sum:"$res"}:{$sum:"$res"}}}];if(e||n.push({$match:{count:b.length-1}}),g&&(m.doc="$doc.doc",n.push({$lookup:{from:"reg",localField:"_id",foreignField:"id",as:"doc"}},{$unwind:{path:"$doc",preserveNullAndEmptyArrays:!0}})),h){const a={};for(let b=0,c=1;b<h.length;b+=2)m["tag"+c]="$tag"+c+".tag",a["tag"+c]=h[b+1],n.push({$lookup:{from:"tag-"+sanitize(h[b]),localField:"_id",foreignField:"id",as:"tag"+c}}),c++;n.push({$match:a})}else;n.push({$sort:e?{count:-1,res:1}:{res:1}},{$skip:d},{$limit:c}),n.push({$project:m}),i=await this.db.collection("ctx"+this.field).aggregate(n)}else{const a={_id:1};f||(a.res=1),g&&(a.doc=1);const j=[{$match:{key:{$in:b}}},{$group:{_id:"$id",count:{$sum:1},res:e?{$sum:"$res"}:{$sum:"$res"}}}];if(e||j.push({$match:{count:b.length}}),g&&(a.doc="$doc.doc",j.push({$lookup:{from:"reg",localField:"_id",foreignField:"id",as:"doc"}},{$unwind:{path:"$doc",preserveNullAndEmptyArrays:!0}})),h){const b={};for(let c=0,d=1;c<h.length;c+=2)a["tag"+d]="$tag"+d+".tag",b["tag"+d]=h[c+1],j.push({$lookup:{from:"tag-"+sanitize(h[c]),localField:"_id",foreignField:"id",as:"tag"+d}}),d++;j.push({$match:b})}else;j.push({$sort:e?{count:-1,res:1}:{res:1}},{$skip:d},{$limit:c}),j.push({$project:a}),i=await this.db.collection("map"+this.field).aggregate(j)}for(;;){const a=await i.next();if(a)f&&!g?j.push(a._id):(a.id=a._id,delete a._id,j.push(a));else break}return f&&!g?j:create_result(j,f,g)},MongoDB.prototype.info=function(){},MongoDB.prototype.transaction=function(a){return a.call(this)},MongoDB.prototype.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 a,c=0;c<d.length;c++)if(a=d[c],a.clear){await this.clear(),b=!0;break}else d[c]=a.del;b||(!c&&(d=d.concat(toArray(a.reg))),d.length&&(await this.remove(d)))}if(a.reg.size){const b=[];if(a.map.size){let c=[];for(const b of a.map){const a=b[0],d=b[1];for(let b,e=0;e<d.length;e++)if((b=d[e])&&b.length){this.type||(this.type=typeof b[0]);for(let d=0;d<b.length;d++)c.push({key:a,res:e,id:b[d]})}}c.length&&b.push(this.db.collection("map"+this.field).insertMany(c))}if(a.ctx.size){let c=[];for(const b of a.ctx){const a=b[0],d=b[1];for(const b of d){const d=b[0],e=b[1];for(let b,f=0;f<e.length;f++)if((b=e[f])&&b.length)for(let e=0;e<b.length;e++)c.push({ctx:a,key:d,res:f,id:b[e]})}}c.length&&b.push(this.db.collection("ctx"+this.field).insertMany(c))}if(a.tag){let c=[];for(const b of a.tag){const a=b[0],d=b[1];if(d.length)for(let b=0;b<d.length;b++)c.push({tag:a,id:d[b]})}c.length&&b.push(this.db.collection("tag"+this.field).insertMany(c))}let c=[];if(a.store)for(const b of a.store.entries()){const a=b[0],d=b[1];c.push({id:a,doc:d})}else if(!a.bypass)for(const b of a.reg.keys())c.push({id:b});c.length&&b.push(this.db.collection("reg").insertMany(c)),b.length&&(await Promise.all(b)),a.map.clear(),a.ctx.clear(),a.tag&&a.tag.clear(),a.store&&a.store.clear(),a.document||a.reg.clear()}},MongoDB.prototype.remove=function(a){if(a||0===a)return"object"!=typeof a&&(a=[a]),Promise.all([this.db.collection("map"+this.field).deleteMany({id:{$in:a}}),this.db.collection("ctx"+this.field).deleteMany({id:{$in:a}}),this.db.collection("tag"+this.field).deleteMany({id:{$in:a}}),this.db.collection("reg").deleteMany({id:{$in:a}})])};
\ No newline at end of file
+import{MongoClient}from"mongodb";const defaults={host:"localhost",port:"27017",user:null,pass:null},VERSION=1,fields=["map","ctx","tag","reg","cfg"];import StorageInterface from"../interface.js";import{toArray}from"../../common.js";function sanitize(a){return a.toLowerCase().replace(/[^a-z0-9_\-]/g,"")}let CLIENT,Index=Object.create(null);export default function MongoDB(a,b={}){return this&&this.constructor===MongoDB?void("object"==typeof a&&(b=a,a=a.name),!a&&console.info("Default storage space was used, because a name was not passed."),this.id="flexsearch"+(a?"-"+sanitize(a):""),this.field=b.field?"-"+sanitize(b.field):"",this.type=b.type||"",this.db=b.db||Index[this.id]||CLIENT||null,this.trx=!1,this.support_tag_search=!0,Object.assign(defaults,b),this.db&&delete defaults.db):new MongoDB(a,b)}MongoDB.prototype.mount=function(a){return a.index?a.mount(this):(a.db=this,this.open())};async function createCollection(a,b,c){"map"===b?(await a.createCollection("map"+c),await a.collection("map"+c).createIndex({key:1}),await a.collection("map"+c).createIndex({id:1})):"ctx"===b?(await a.createCollection("ctx"+c),await a.collection("ctx"+c).createIndex({ctx:1,key:1}),await a.collection("ctx"+c).createIndex({id:1})):"tag"===b?(await a.createCollection("tag"+c),await a.collection("tag"+c).createIndex({tag:1}),await a.collection("tag"+c).createIndex({id:1})):"reg"===b?(await a.createCollection("reg"),await a.collection("reg").createIndex({id:1})):"cfg"===b?await a.createCollection("cfg"+c):void 0}MongoDB.prototype.open=async function(){if(!this.db&&!(this.db=Index[this.id])&&!(this.db=CLIENT)){let a=defaults.url;a||(a=defaults.user?`mongodb://${defaults.user}:${defaults.pass}@${defaults.host}:${defaults.port}`:`mongodb://${defaults.host}:${defaults.port}`),this.db=CLIENT=new MongoClient(a),await this.db.connect()}this.db.db&&(this.db=Index[this.id]=this.db.db(this.id));const a=await this.db.listCollections().toArray();for(let b,c=0;c<fields.length;c++){b=!1;for(let d=0;d<a.length;d++)if(a[d].name===fields[c]+("reg"===fields[c]?"":this.field)){b=!0;break}b||(await createCollection(this.db,fields[c],this.field))}return this.db},MongoDB.prototype.close=function(){return this.db=CLIENT=null,Index[this.id]=null,this},MongoDB.prototype.destroy=function(){return Promise.all([this.db.dropCollection("map"+this.field),this.db.dropCollection("ctx"+this.field),this.db.dropCollection("tag"+this.field),this.db.dropCollection("cfg"+this.field),this.db.dropCollection("reg")])};async function clear(a){await this.db.dropCollection(a),await createCollection(this.db,a,this.field)}MongoDB.prototype.clear=function(){return Promise.all([clear.call(this,"map"+this.field),clear.call(this,"ctx"+this.field),clear.call(this,"tag"+this.field),clear.call(this,"cfg"+this.field),clear.call(this,"reg")])};function create_result(a,b,c){if(b){if(!c)for(let b=0;b<a.length;b++)a[b]=a[b].id;return a}else{const b=[];for(let d,e=0;e<a.length;e++)d=a[e],b[d.res]||(b[d.res]=[]),b[d.res].push(c?d:d.id);return b}}MongoDB.prototype.get=async function(a,b,c=0,d=0,e=!0,f=!1,g){let h,i=b?{ctx:b,key:a}:{key:a};if(!f&&!g)h=await this.db.collection((b?"ctx":"map")+this.field).find(i,{projection:{_id:0,res:1,id:1},limit:c,skip:d}).toArray();else{const a={_id:0,id:1},j=[{$match:i}];if(e||(a.res=1),f&&(a.doc="$doc.doc",j.push({$lookup:{from:"reg",localField:"id",foreignField:"id",as:"doc"}},{$unwind:{path:"$doc",preserveNullAndEmptyArrays:!0}})),g){const b={};for(let c=0,d=1;c<g.length;c+=2)a["tag"+d]="$tag"+d+".tag",b["tag"+d]=g[c+1],j.push({$lookup:{from:"tag-"+sanitize(g[c]),localField:"id",foreignField:"id",as:"tag"+d}}),d++;j.push({$project:a},{$match:b},{$project:{id:1,doc:1}})}else j.push({$project:a});j.push({$sort:{res:1}},{$skip:d},{$limit:c}),h=[];for(const a=await this.db.collection((b?"ctx":"map")+this.field).aggregate(j);;){const b=await a.next();if(b)h.push(b);else break}}return create_result(h,e,f)},MongoDB.prototype.tag=async function(a,b=0,c=0,d=!1){if(!d){const d=await this.db.collection("tag"+this.field).find({tag:a},{projection:{_id:0,id:1},limit:b,skip:c}).toArray();return create_result(d,!0,!1)}else{const d=[{$match:{tag:a}},{$skip:c},{$limit:b},{$lookup:{from:"reg",localField:"id",foreignField:"id",as:"doc"}},{$project:{_id:0,id:1,doc:"$doc.doc"}},{$unwind:{path:"$doc",preserveNullAndEmptyArrays:!0}}];let e=[];for(const a=await this.db.collection("tag"+this.field).aggregate(d);;){const b=await a.next();if(b)e.push(b);else break}return e}},MongoDB.prototype.enrich=function(a){return"object"!=typeof a&&(a=[a]),this.db.collection("reg").find({id:{$in:a}},{projection:{_id:0,id:1,doc:1}}).toArray()},MongoDB.prototype.has=function(a){return this.db.collection("reg").countDocuments({id:a},{limit:1}).then(function(a){return!!a})},MongoDB.prototype.search=async function(a,b,c=100,d=0,e=!1,f=!0,g=!1,h){let i,j=[];if(1<b.length&&a.depth){let j,k=[],l=b[0];for(let c=1;c<b.length;c++){j=b[c];const d=a.bidirectional&&j>l;k.push({ctx:d?j:l,key:d?l:j}),l=j}const m={_id:1};f||(m.res=1),g&&(m.doc=1);const n=[{$match:{$or:k}},{$group:{_id:"$id",count:{$sum:1},res:e?{$sum:"$res"}:{$sum:"$res"}}}];if(e||n.push({$match:{count:b.length-1}}),g&&(m.doc="$doc.doc",n.push({$lookup:{from:"reg",localField:"_id",foreignField:"id",as:"doc"}},{$unwind:{path:"$doc",preserveNullAndEmptyArrays:!0}})),h){const a={};for(let b=0,c=1;b<h.length;b+=2)m["tag"+c]="$tag"+c+".tag",a["tag"+c]=h[b+1],n.push({$lookup:{from:"tag-"+sanitize(h[b]),localField:"_id",foreignField:"id",as:"tag"+c}}),c++;n.push({$match:a})}else;n.push({$sort:e?{count:-1,res:1}:{res:1}},{$skip:d},{$limit:c}),n.push({$project:m}),i=await this.db.collection("ctx"+this.field).aggregate(n)}else{const a={_id:1};f||(a.res=1),g&&(a.doc=1);const j=[{$match:{key:{$in:b}}},{$group:{_id:"$id",count:{$sum:1},res:e?{$sum:"$res"}:{$sum:"$res"}}}];if(e||j.push({$match:{count:b.length}}),g&&(a.doc="$doc.doc",j.push({$lookup:{from:"reg",localField:"_id",foreignField:"id",as:"doc"}},{$unwind:{path:"$doc",preserveNullAndEmptyArrays:!0}})),h){const b={};for(let c=0,d=1;c<h.length;c+=2)a["tag"+d]="$tag"+d+".tag",b["tag"+d]=h[c+1],j.push({$lookup:{from:"tag-"+sanitize(h[c]),localField:"_id",foreignField:"id",as:"tag"+d}}),d++;j.push({$match:b})}else;j.push({$sort:e?{count:-1,res:1}:{res:1}},{$skip:d},{$limit:c}),j.push({$project:a}),i=await this.db.collection("map"+this.field).aggregate(j)}for(;;){const a=await i.next();if(a)f&&!g?j.push(a._id):(a.id=a._id,delete a._id,j.push(a));else break}return f&&!g?j:create_result(j,f,g)},MongoDB.prototype.info=function(){},MongoDB.prototype.transaction=function(a){return a.call(this)},MongoDB.prototype.commit=async function(a,b,c){if(b)await this.clear(),a.commit_task=[];else{let d=a.commit_task;a.commit_task=[];for(let a,c=0;c<d.length;c++)if(a=d[c],a.clear){await this.clear(),b=!0;break}else d[c]=a.del;b||(!c&&(d=d.concat(toArray(a.reg))),d.length&&(await this.remove(d)))}if(a.reg.size){const b=[];if(a.map.size){let c=[];for(const b of a.map){const a=b[0],d=b[1];for(let b,e=0;e<d.length;e++)if((b=d[e])&&b.length){this.type||(this.type=typeof b[0]);for(let d=0;d<b.length;d++)c.push({key:a,res:e,id:b[d]})}}c.length&&b.push(this.db.collection("map"+this.field).insertMany(c))}if(a.ctx.size){let c=[];for(const b of a.ctx){const a=b[0],d=b[1];for(const b of d){const d=b[0],e=b[1];for(let b,f=0;f<e.length;f++)if((b=e[f])&&b.length)for(let e=0;e<b.length;e++)c.push({ctx:a,key:d,res:f,id:b[e]})}}c.length&&b.push(this.db.collection("ctx"+this.field).insertMany(c))}if(a.tag){let c=[];for(const b of a.tag){const a=b[0],d=b[1];if(d.length)for(let b=0;b<d.length;b++)c.push({tag:a,id:d[b]})}c.length&&b.push(this.db.collection("tag"+this.field).insertMany(c))}let c=[];if(a.store)for(const b of a.store.entries()){const a=b[0],d=b[1];c.push({id:a,doc:d})}else if(!a.bypass)for(const b of a.reg.keys())c.push({id:b});c.length&&b.push(this.db.collection("reg").insertMany(c)),b.length&&(await Promise.all(b)),a.map.clear(),a.ctx.clear(),a.tag&&a.tag.clear(),a.store&&a.store.clear(),a.document||a.reg.clear()}},MongoDB.prototype.remove=function(a){if(a||0===a)return"object"!=typeof a&&(a=[a]),Promise.all([this.db.collection("map"+this.field).deleteMany({id:{$in:a}}),this.db.collection("ctx"+this.field).deleteMany({id:{$in:a}}),this.db.collection("tag"+this.field).deleteMany({id:{$in:a}}),this.db.collection("reg").deleteMany({id:{$in:a}})])};
\ No newline at end of file
diff --git a/dist/module-min/db/postgres/index.js b/dist/module-min/db/postgres/index.js
index 6457d20..ca21bb9 100644
--- a/dist/module-min/db/postgres/index.js
+++ b/dist/module-min/db/postgres/index.js
@@ -1,4 +1,4 @@
-import pg_promise from"pg-promise";import StorageInterface from"../interface.js";import{concat,toArray}from"../../common.js";const defaults={schema:"flexsearch",user:"postgres",pass:"postgres",name:"postgres",host:"localhost",port:"5432"},pgp=pg_promise(),VERSION=1,MAXIMUM_QUERY_VARS=16000,fields=["map","ctx","reg","tag","cfg"],types={text:"text",char:"text",varchar:"text",string:"text",number:"int",numeric:"int",integer:"int",smallint:"int",tinyint:"int",mediumint:"int",int:"int",int8:"int",uint8:"int",int16:"int",uint16:"int",int32:"int",uint32:"bigint",int64:"bigint",bigint:"bigint"};function sanitize(a){return a.toLowerCase().replace(/[^a-z0-9_]/g,"")}let DB,TRX;export default function PostgresDB(a,b={}){if(!this)return new PostgresDB(a,b);if("object"==typeof a&&(b=a,a=b.name),a||console.info("Default storage space was used, because a name was not passed."),this.id=(b.schema?sanitize(b.schema):defaults.schema)+(a?"_"+sanitize(a):""),this.field=b.field?"_"+sanitize(b.field):"",this.type=b.type?types[b.type.toLowerCase()]:"text",this.support_tag_search=!0,!this.type)throw new Error("Unknown type of ID '"+b.type+"'");this.db=DB||(DB=b.db||null),Object.assign(defaults,b),this.db&&delete defaults.db}PostgresDB.prototype.mount=function(a){return a.encoder?(a.db=this,this.open()):a.mount(this)},PostgresDB.prototype.open=async function(){this.db||(this.db=DB||(DB=pgp(`postgres://${defaults.user}:${encodeURIComponent(defaults.pass)}@${defaults.host}:${defaults.port}/${defaults.name}`)));const a=await this.db.oneOrNone(`
+import pg_promise from"pg-promise";import StorageInterface from"../interface.js";import{concat,toArray}from"../../common.js";const defaults={schema:"flexsearch",user:"postgres",pass:"postgres",name:"postgres",host:"localhost",port:"5432"},pgp=pg_promise(),VERSION=1,MAXIMUM_QUERY_VARS=16000,fields=["map","ctx","reg","tag","cfg"],types={text:"text",char:"text",varchar:"text",string:"text",number:"int",numeric:"int",integer:"int",smallint:"int",tinyint:"int",mediumint:"int",int:"int",int8:"int",uint8:"int",int16:"int",uint16:"int",int32:"int",uint32:"bigint",int64:"bigint",bigint:"bigint"};function sanitize(a){return a.toLowerCase().replace(/[^a-z0-9_]/g,"")}let DB,TRX;export default function PostgresDB(a,b={}){if(!this||this.constructor!==PostgresDB)return new PostgresDB(a,b);if("object"==typeof a&&(b=a,a=b.name),a||console.info("Default storage space was used, because a name was not passed."),this.id=(b.schema?sanitize(b.schema):defaults.schema)+(a?"_"+sanitize(a):""),this.field=b.field?"_"+sanitize(b.field):"",this.type=b.type?types[b.type.toLowerCase()]:"text",this.support_tag_search=!0,!this.type)throw new Error("Unknown type of ID '"+b.type+"'");this.db=DB||(DB=b.db||null),Object.assign(defaults,b),this.db&&delete defaults.db}PostgresDB.prototype.mount=function(a){return a.index?a.mount(this):(a.db=this,this.open())},PostgresDB.prototype.open=async function(){this.db||(this.db=DB||(DB=pgp(`postgres://${defaults.user}:${encodeURIComponent(defaults.pass)}@${defaults.host}:${defaults.port}/${defaults.name}`)));const a=await this.db.oneOrNone(`
         SELECT EXISTS (
             SELECT 1 
             FROM information_schema.schemata 
diff --git a/dist/module-min/db/redis/index.js b/dist/module-min/db/redis/index.js
index 7686562..7d584d0 100644
--- a/dist/module-min/db/redis/index.js
+++ b/dist/module-min/db/redis/index.js
@@ -1 +1 @@
-import{createClient}from"redis";const defaults={host:"localhost",port:"6379",user:null,pass:null},VERSION=1,fields=["map","ctx","reg","tag","doc","cfg"];import StorageInterface from"../interface.js";import{toArray}from"../../common.js";function sanitize(a){return a.toLowerCase().replace(/[^a-z0-9_\-]/g,"")}let DB,TRX;export default function RedisDB(a,b={}){return this?void("object"==typeof a&&(b=a,a=a.name),!a&&console.info("Default storage space was used, because a name was not passed."),this.id=(a?sanitize(a):"flexsearch")+"|",this.field=b.field?"-"+sanitize(b.field):"",this.type=b.type||"",this.fastupdate=!0,this.db=b.db||DB||null,this.support_tag_search=!0,Object.assign(defaults,b),this.db&&delete defaults.db):new RedisDB(a,b)}RedisDB.prototype.mount=function(a){return a.encoder?(a.db=this,this.open()):a.mount(this)},RedisDB.prototype.open=async function(){if(this.db)return this.db;let a=defaults.url;return a||(a=defaults.user?`redis://${defaults.user}:${defaults.pass}@${defaults.host}:${defaults.port}`:`redis://${defaults.host}:${defaults.port}`),this.db=await createClient(a).on("error",a=>console.error(a)).connect()},RedisDB.prototype.close=async function(){return DB,this.db=null,this},RedisDB.prototype.destroy=function(){return this.clear()},RedisDB.prototype.clear=function(){return this.db.unlink([this.id+"map"+this.field,this.id+"ctx"+this.field,this.id+"tag"+this.field,this.id+"cfg"+this.field,this.id+"doc",this.id+"reg"])};function create_result(a,b,c,d){if(c){for(let c,d,e=0;e<a.length;e++)c=a[e],d="number"===b?parseInt(c.value||c,10):c.value||c,a[e]=d;return a}else{let c=[];for(let e,f,g,h=0;h<a.length;h++)e=a[h],f="number"===b?parseInt(e.value,10):e.value,g=e.score,c[g]||(c[g]=[]),c[g].push(d?{id:f,doc:e.doc}:f);return c}}RedisDB.prototype.get=function(a,b,c=0,d=0,e=!0,f=!1,g){if(g){const h=b?[b,a]:[a];return this.search({depth:!!b},h,c,d,!1,e,f,g)}const h=this.type,i=this;let j;return j=b?this.db[e?"zRange":"zRangeWithScores"](this.id+"ctx"+this.field+":"+b+":"+a,""+d,""+(d+c-1),{REV:!0}):this.db[e?"zRange":"zRangeWithScores"](this.id+"map"+this.field+":"+a,""+d,""+(d+c-1),{REV:!0}),j.then(async function(a){return a.length?(f&&(a=await i.enrich(a)),create_result(a,h,e,f)):a})},RedisDB.prototype.tag=function(a,b=0,c=0,d=!1){const e=this;return this.db.sMembers(this.id+"tag"+this.field+":"+a).then(function(a){if(!a||!a.length||c>=a.length)return[];if(!b&&!c)return a;const f=a.slice(c,c+b);return d?e.enrich(f):f})},RedisDB.prototype.enrich=function(a){return"object"!=typeof a&&(a=[a]),this.db.hmGet(this.id+"doc",a).then(function(b){for(let c=0;c<b.length;c++)b[c]={id:a[c],doc:b[c]&&JSON.parse(b[c])};return b})},RedisDB.prototype.has=function(a){return this.db.sIsMember(this.id+"reg",""+a)},RedisDB.prototype.search=function(a,b,c=100,d=0,e=!1,f=!0,g=!1,h){let i,j=[];if(1<b.length&&a.depth){const c=this.id+"ctx"+this.field+":";let d,e=b[0];for(let f,g=1;g<b.length;g++)d=b[g],f=a.bidirectional&&d>e,j.push(c+(f?d:e)+":"+(f?e:d)),e=d}else{const a=this.id+"map"+this.field+":";for(let c=0;c<b.length;c++)j.push(a+b[c])}b=j;const k=this.type;let l=this.id+"tmp:"+Math.random();if(e){const a=this.db.multi().zUnionStore(l,b,{AGGREGATE:"SUM"});if(h){b=[l];for(let a=0;a<h.length;a+=2)b.push(this.id+"tag-"+sanitize(h[a])+":"+h[a+1]);a.zInterStore(l,b,{AGGREGATE:"SUM"})}i=a[f?"zRange":"zRangeWithScores"](l,""+d,""+(d+c-1),{REV:!0}).unlink(l).exec()}else{if(h)for(let a=0;a<h.length;a+=2)b.push(this.id+"tag-"+sanitize(h[a])+":"+h[a+1]);i=this.db.multi().zInterStore(l,b,{AGGREGATE:"MIN"})[f?"zRange":"zRangeWithScores"](l,""+d,""+(d+c-1),{REV:!0}).unlink(l).exec()}const m=this;return i.then(async function(a){return(a=e&&h?a[2]:a[1],!a.length)?a:(g&&(a=await m.enrich(a)),create_result(a,k,f,g))})},RedisDB.prototype.info=function(){},RedisDB.prototype.transaction=async function(a,b){if(TRX)return a.call(this,TRX);TRX=this.db.multi();let c=a.call(this,TRX),d=TRX.exec();TRX=null,b&&promise.then(b),await Promise.all([c,d])},RedisDB.prototype.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 a,c=0;c<d.length;c++)if(a=d[c],a.clear){await this.clear(),b=!0;break}else d[c]=""+a.del;b||(!c&&(d=d.concat(toArray(a.reg,!0))),d.length&&(await this.remove(d)))}a.reg.size&&(await this.transaction(function(b){let c=new Map;for(const d of a.map){const a=d[0],e=d[1];for(let d,f=0;f<e.length;f++)if((d=e[f])&&d.length){let e=[];for(let a=0;a<d.length;a++)e.push({score:f,value:""+d[a]});"number"==typeof d[0]&&(this.type="number");const g=this.id+"map"+this.field+":"+a;if(b.zAdd(g,e),this.fastupdate)for(let a,b=0;b<d.length;b++){a=d[b];let e=c.get(a);e||c.set(a,e=[]),e.push(g)}}}if(this.fastupdate)for(const a of c){const c=a[0],d=a[1];b.sAdd(this.id+"ref"+this.field+":"+c,d)}c=new Map;for(const d of a.ctx){const a=d[0],e=d[1];for(const d of e){const e=d[0],f=d[1];for(let d,g=0;g<f.length;g++)if((d=f[g])&&d.length){let f=[];for(let a=0;a<d.length;a++)f.push({score:g,value:""+d[a]});"number"==typeof d[0]&&(this.type="number");const h=this.id+"ctx"+this.field+":"+a+":"+e;if(b.zAdd(h,f),this.fastupdate)for(let a,b=0;b<d.length;b++){a=d[b];let e=c.get(a);e||c.set(a,e=[]),e.push(h)}}}}if(this.fastupdate)for(const a of c){const c=a[0],d=a[1];b.sAdd(this.id+"ref"+this.field+":"+c,d)}if(a.store)for(const c of a.store.entries()){const a=c[0],d=c[1];d&&b.hSet(this.id+"doc",""+a,JSON.stringify(d))}if(!a.bypass){let c=toArray(a.reg,!0);c.length&&b.sAdd(this.id+"reg",c)}if(a.tag)for(const c of a.tag){const a=c[0],d=c[1];if(!d.length)continue;let e=[];if("number"==typeof d[0])for(let a=0;a<d.length;a++)e[a]=""+d[a];else e=d;b.sAdd(this.id+"tag"+this.field+":"+a,e)}}),a.map.clear(),a.ctx.clear(),a.tag&&a.tag.clear(),a.store&&a.store.clear(),a.document||a.reg.clear())},RedisDB.prototype.remove=function(a){if(a||0===a)return"object"!=typeof a&&(a=[a]),a.length?this.transaction(async function(b){for(;a.length;){let c;if(10000<a.length&&(c=a.slice(10000),a=a.slice(0,10000)),"number"==typeof a[0])for(let b=0;b<a.length;b++)a[b]=""+a[b];const d=await this.db.smIsMember(this.id+"reg",a);for(let c,e=0;e<a.length;e++)if(d[e]){if(c=""+a[e],this.fastupdate){const a=await this.db.sMembers(this.id+"ref"+this.field+":"+c);if(a){for(let d=0;d<a.length;d++)b.zRem(a[d],c);b.unlink(this.id+"ref"+this.field+":"+c)}}else;b.hDel(this.id+"doc",c),b.sRem(this.id+"reg",c)}if(c)a=c;else break}}):void 0};
\ No newline at end of file
+import{createClient}from"redis";const defaults={host:"localhost",port:"6379",user:null,pass:null},VERSION=1,fields=["map","ctx","reg","tag","doc","cfg"];import StorageInterface from"../interface.js";import{toArray}from"../../common.js";function sanitize(a){return a.toLowerCase().replace(/[^a-z0-9_\-]/g,"")}let DB,TRX;export default function RedisDB(a,b={}){return this&&this.constructor===RedisDB?void("object"==typeof a&&(b=a,a=a.name),!a&&console.info("Default storage space was used, because a name was not passed."),this.id=(a?sanitize(a):"flexsearch")+"|",this.field=b.field?"-"+sanitize(b.field):"",this.type=b.type||"",this.fastupdate=!0,this.db=b.db||DB||null,this.support_tag_search=!0,Object.assign(defaults,b),this.db&&delete defaults.db):new RedisDB(a,b)}RedisDB.prototype.mount=function(a){return a.index?a.mount(this):(a.db=this,this.open())},RedisDB.prototype.open=async function(){if(this.db)return this.db;if(DB)return this.db=DB;let a=defaults.url;return a||(a=defaults.user?`redis://${defaults.user}:${defaults.pass}@${defaults.host}:${defaults.port}`:`redis://${defaults.host}:${defaults.port}`),this.db=DB=await createClient(a).on("error",a=>console.error(a)).connect()},RedisDB.prototype.close=async function(){return DB&&(await this.db.disconnect()),this.db=DB=null,this},RedisDB.prototype.destroy=function(){return this.clear()},RedisDB.prototype.clear=function(){return this.db.unlink([this.id+"map"+this.field,this.id+"ctx"+this.field,this.id+"tag"+this.field,this.id+"cfg"+this.field,this.id+"doc",this.id+"reg"])};function create_result(a,b,c,d){if(c){if("number"===b)for(let c,e,f=0;f<a.length;f++)c=a[f],e="number"===b?parseInt(c.id||c,10):c.id||c,a[f]=d?{id:e,doc:c.doc}:e;return a}else{let c=[];for(let d,e,f,g=0;g<a.length;g++)d=a[g],e="number"===b?parseInt(d.id||d,10):d.id||d,f=d.score,c[f]||(c[f]=[]),c[f].push(e);return c}}RedisDB.prototype.get=function(a,b,c=0,d=0,e=!0,f=!1,g){if(g){const h=b?[b,a]:[a];return this.search({depth:!!b},h,c,d,!1,e,f,g)}const h=this.type,i=this;let j;return j=b?this.db[e?"zRange":"zRangeWithScores"](this.id+"ctx"+this.field+":"+b+":"+a,""+d,""+(d+c-1),{REV:!0}):this.db[e?"zRange":"zRangeWithScores"](this.id+"map"+this.field+":"+a,""+d,""+(d+c-1),{REV:!0}),j.then(async function(a){return a.length?(f&&(a=await i.enrich(a)),create_result(a,h,e,f)):a})},RedisDB.prototype.tag=function(a,b=0,c=0,d=!1){const e=this;return this.db.sMembers(this.id+"tag"+this.field+":"+a).then(function(a){if(!a||!a.length||c>=a.length)return[];if(!b&&!c)return a;const f=a.slice(c,c+b);return d?e.enrich(f):f})},RedisDB.prototype.enrich=function(a){return"object"!=typeof a&&(a=[a]),this.db.hmGet(this.id+"doc",a).then(function(b){for(let c=0;c<b.length;c++)b[c]={id:a[c],doc:b[c]&&JSON.parse(b[c])};return b})},RedisDB.prototype.has=function(a){return this.db.sIsMember(this.id+"reg",""+a)},RedisDB.prototype.search=function(a,b,c=100,d=0,e=!1,f=!0,g=!1,h){let i,j=[];if(1<b.length&&a.depth){const c=this.id+"ctx"+this.field+":";let d,e=b[0];for(let f,g=1;g<b.length;g++)d=b[g],f=a.bidirectional&&d>e,j.push(c+(f?d:e)+":"+(f?e:d)),e=d}else{const a=this.id+"map"+this.field+":";for(let c=0;c<b.length;c++)j.push(a+b[c])}b=j;const k=this.type;let l=this.id+"tmp:"+Math.random();if(e){const a=this.db.multi().zUnionStore(l,b,{AGGREGATE:"SUM"});if(h){b=[l];for(let a=0;a<h.length;a+=2)b.push(this.id+"tag-"+sanitize(h[a])+":"+h[a+1]);a.zInterStore(l,b,{AGGREGATE:"SUM"})}i=a[f?"zRange":"zRangeWithScores"](l,""+d,""+(d+c-1),{REV:!0}).unlink(l).exec()}else{if(h)for(let a=0;a<h.length;a+=2)b.push(this.id+"tag-"+sanitize(h[a])+":"+h[a+1]);i=this.db.multi().zInterStore(l,b,{AGGREGATE:"MIN"})[f?"zRange":"zRangeWithScores"](l,""+d,""+(d+c-1),{REV:!0}).unlink(l).exec()}const m=this;return i.then(async function(a){return(a=e&&h?a[2]:a[1],!a.length)?a:(g&&(a=await m.enrich(a)),create_result(a,k,f,g))})},RedisDB.prototype.info=function(){},RedisDB.prototype.transaction=async function(a,b){if(TRX)return a.call(this,TRX);TRX=this.db.multi();let c=a.call(this,TRX),d=TRX.exec();TRX=null,b&&promise.then(b),await Promise.all([c,d])},RedisDB.prototype.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 a,c=0;c<d.length;c++)if(a=d[c],a.clear){await this.clear(),b=!0;break}else d[c]=""+a.del;b||(!c&&(d=d.concat(toArray(a.reg,!0))),d.length&&(await this.remove(d)))}a.reg.size&&(await this.transaction(function(b){let c=new Map;for(const d of a.map){const a=d[0],e=d[1];for(let d,f=0;f<e.length;f++)if((d=e[f])&&d.length){let e=[];for(let a=0;a<d.length;a++)e.push({score:f,value:""+d[a]});"number"==typeof d[0]&&(this.type="number");const g=this.id+"map"+this.field+":"+a;if(b.zAdd(g,e),this.fastupdate)for(let a,b=0;b<d.length;b++){a=d[b];let e=c.get(a);e||c.set(a,e=[]),e.push(g)}}}if(this.fastupdate)for(const a of c){const c=a[0],d=a[1];b.sAdd(this.id+"ref"+this.field+":"+c,d)}c=new Map;for(const d of a.ctx){const a=d[0],e=d[1];for(const d of e){const e=d[0],f=d[1];for(let d,g=0;g<f.length;g++)if((d=f[g])&&d.length){let f=[];for(let a=0;a<d.length;a++)f.push({score:g,value:""+d[a]});"number"==typeof d[0]&&(this.type="number");const h=this.id+"ctx"+this.field+":"+a+":"+e;if(b.zAdd(h,f),this.fastupdate)for(let a,b=0;b<d.length;b++){a=d[b];let e=c.get(a);e||c.set(a,e=[]),e.push(h)}}}}if(this.fastupdate)for(const a of c){const c=a[0],d=a[1];b.sAdd(this.id+"ref"+this.field+":"+c,d)}if(a.store)for(const c of a.store.entries()){const a=c[0],d=c[1];d&&b.hSet(this.id+"doc",""+a,JSON.stringify(d))}if(!a.bypass){let c=toArray(a.reg,!0);c.length&&b.sAdd(this.id+"reg",c)}if(a.tag)for(const c of a.tag){const a=c[0],d=c[1];if(!d.length)continue;let e=[];if("number"==typeof d[0])for(let a=0;a<d.length;a++)e[a]=""+d[a];else e=d;b.sAdd(this.id+"tag"+this.field+":"+a,e)}}),a.map.clear(),a.ctx.clear(),a.tag&&a.tag.clear(),a.store&&a.store.clear(),a.document||a.reg.clear())},RedisDB.prototype.remove=function(a){if(a||0===a)return"object"!=typeof a&&(a=[a]),a.length?this.transaction(async function(b){for(;a.length;){let c;if(10000<a.length&&(c=a.slice(10000),a=a.slice(0,10000)),"number"==typeof a[0])for(let b=0;b<a.length;b++)a[b]=""+a[b];const d=await this.db.smIsMember(this.id+"reg",a);for(let c,e=0;e<a.length;e++)if(d[e]){if(c=""+a[e],this.fastupdate){const a=await this.db.sMembers(this.id+"ref"+this.field+":"+c);if(a){for(let d=0;d<a.length;d++)b.zRem(a[d],c);b.unlink(this.id+"ref"+this.field+":"+c)}}else;b.hDel(this.id+"doc",c),b.sRem(this.id+"reg",c)}if(c)a=c;else break}}):void 0};
\ No newline at end of file
diff --git a/dist/module-min/db/sqlite/index.js b/dist/module-min/db/sqlite/index.js
index eac79eb..3cd029d 100644
--- a/dist/module-min/db/sqlite/index.js
+++ b/dist/module-min/db/sqlite/index.js
@@ -1,4 +1,4 @@
-import sqlite3 from"sqlite3";import path from"path";import StorageInterface from"../interface.js";import{concat,toArray}from"../../common.js";const VERSION=1,MAXIMUM_QUERY_VARS=16000,fields=["map","ctx","reg","tag","cfg"],types={text:"text",char:"text",varchar:"text",string:"text",number:"int",numeric:"int",integer:"int",smallint:"int",tinyint:"int",mediumint:"int",int:"int",int8:"int",uint8:"int",int16:"int",uint16:"int",int32:"int",uint32:"bigint",int64:"bigint",bigint:"bigint"};function sanitize(a){return a.toLowerCase().replace(/[^a-z0-9_]/g,"")}const TRX=Object.create(null),Index=Object.create(null);export default function SqliteDB(a,b={}){if(!this)return new SqliteDB(a,b);if("object"==typeof a&&(b=a,a=a.name),a||console.info("Default storage space was used, because a name was not passed."),this.id=b.path||(":memory:"===a?a:"flexsearch"+(a?"-"+sanitize(a):"")+".sqlite"),this.field=b.field?"_"+sanitize(b.field):"",this.support_tag_search=!0,this.db=b.db||Index[this.id]||null,this.type=b.type?types[b.type.toLowerCase()]:"string",!this.type)throw new Error("Unknown type of ID '"+b.type+"'")}SqliteDB.prototype.mount=function(a){return a.encoder?(a.db=this,this.open()):a.mount(this)},SqliteDB.prototype.open=async function(){if(!this.db&&!(this.db=Index[this.id])){let a=this.id;if(":memory:"!==a&&"/"!==a[0]&&"\\"!==a[0]){const b=process.cwd();a=path.join(b,this.id)}this.db=Index[this.id]=new sqlite3.Database(a)}const a=this.db;for(let b=0;b<fields.length;b++){const c=await this.promisfy({method:"get",stmt:"SELECT EXISTS(SELECT 1 FROM sqlite_master WHERE type = 'table' AND name = ?) as exist",params:[fields[b]+("reg"===fields[b]?"":this.field)]});if(!c||!c.exist){let c,d;switch(fields[b]){case"map":c=`
+import sqlite3 from"sqlite3";import path from"path";import StorageInterface from"../interface.js";import{concat,toArray}from"../../common.js";const VERSION=1,MAXIMUM_QUERY_VARS=16000,fields=["map","ctx","reg","tag","cfg"],types={text:"text",char:"text",varchar:"text",string:"text",number:"int",numeric:"int",integer:"int",smallint:"int",tinyint:"int",mediumint:"int",int:"int",int8:"int",uint8:"int",int16:"int",uint16:"int",int32:"int",uint32:"bigint",int64:"bigint",bigint:"bigint"};function sanitize(a){return a.toLowerCase().replace(/[^a-z0-9_]/g,"")}const TRX=Object.create(null),Index=Object.create(null);export default function SqliteDB(a,b={}){if(!this||this.constructor!==SqliteDB)return new SqliteDB(a,b);if("object"==typeof a&&(b=a,a=a.name),a||console.info("Default storage space was used, because a name was not passed."),this.id=b.path||(":memory:"===a?a:"flexsearch"+(a?"-"+sanitize(a):"")+".sqlite"),this.field=b.field?"_"+sanitize(b.field):"",this.support_tag_search=!0,this.db=b.db||Index[this.id]||null,this.type=b.type?types[b.type.toLowerCase()]:"string",!this.type)throw new Error("Unknown type of ID '"+b.type+"'")}SqliteDB.prototype.mount=function(a){return a.index?a.mount(this):(a.db=this,this.open())},SqliteDB.prototype.open=async function(){if(!this.db&&!(this.db=Index[this.id])){let a=this.id;if(":memory:"!==a&&"/"!==a[0]&&"\\"!==a[0]){const b=process.cwd();a=path.join(b,this.id)}this.db=Index[this.id]=new sqlite3.Database(a)}const a=this.db;for(let b=0;b<fields.length;b++){const c=await this.promisfy({method:"get",stmt:"SELECT EXISTS(SELECT 1 FROM sqlite_master WHERE type = 'table' AND name = ?) as exist",params:[fields[b]+("reg"===fields[b]?"":this.field)]});if(!c||!c.exist){let c,d;switch(fields[b]){case"map":c=`
                         CREATE TABLE IF NOT EXISTS main.map${this.field}(
                             key TEXT NOT NULL,
                             res INTEGER NOT NULL,
diff --git a/dist/module-min/document.js b/dist/module-min/document.js
index 993c3d0..3fc1171 100644
--- a/dist/module-min/document.js
+++ b/dist/module-min/document.js
@@ -1 +1 @@
-import{IndexOptions,DocumentOptions,DocumentDescriptor,FieldOptions,StoreOptions}from"./type.js";import StorageInterface from"./db/interface.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||a.worker||a.db?d&&!0?new KeystoreSet(d):new Set:d&&!0?new KeystoreMap(d):new Map,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.priority=a.priority||4,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){this.fastupdate=!1;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.fastupdate=!1,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.commit(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(){const a=[];for(const b of this.index.values()){const c=b.clear();c.then&&a.push(c)}if(this.tag)for(const a of this.tag.values())a.clear();return this.store&&this.store.clear(),this.cache&&this.cache.clear(),a.length?Promise.all(a):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||null}):this.store.get(a)||null},Document.prototype.set=function(a,b){return"object"==typeof a&&(b=a,a=parse_simple(b,this.key)),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,EncoderOptions}from"./type.js";import StorageInterface from"./db/interface.js";import Index from"./index.js";import WorkerIndex from"./worker.js";import Encoder from"./encoder.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||a.worker||a.db?d&&!0?new KeystoreSet(d):new Set:d&&!0?new KeystoreMap(d):new Map,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||!1,this.priority=a.priority||4,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){this.fastupdate=!1;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(c){const d=new Map;let e=0;for(const f of b.index.entries()){const g=f[0];let h=f[1];if(h.then){let f=a[e].encoder||{},i=d.get(f);i||(i=f.encode?f:new Encoder(f),d.set(f,i)),h=c[e],h.encoder=i,b.index.set(g,h),e++}}return b})}}else a.db&&(this.fastupdate=!1,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}const e=this;return this.db=Promise.all(c).then(function(){e.db=!0})},Document.prototype.commit=async function(a,b){const c=[];for(const d of this.index.values())c.push(d.commit(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?(a.encoder=f.encoder,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(){const a=[];for(const b of this.index.values()){const c=b.clear();c.then&&a.push(c)}if(this.tag)for(const a of this.tag.values())a.clear();return this.store&&this.store.clear(),this.cache&&this.cache.clear(),a.length?Promise.all(a):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||null}):this.store.get(a)||null},Document.prototype.set=function(a,b){return"object"==typeof a&&(b=a,a=parse_simple(b,this.key)),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/db/clickhouse/index.js b/dist/module/db/clickhouse/index.js
index f0fd081..5d12d2f 100644
--- a/dist/module/db/clickhouse/index.js
+++ b/dist/module/db/clickhouse/index.js
@@ -55,7 +55,7 @@ let Index;
  */
 
 export default function ClickhouseDB(name, config = {}) {
-    if (!this) {
+    if (!this || this.constructor !== ClickhouseDB) {
         return new ClickhouseDB(name, config);
     }
     if ("object" == typeof name) {
@@ -82,7 +82,7 @@ export default function ClickhouseDB(name, config = {}) {
 
 ClickhouseDB.prototype.mount = function (flexsearch) {
     //if(flexsearch.constructor === Document){
-    if (!flexsearch.encoder) {
+    if (flexsearch.index) {
         return flexsearch.mount(this);
     }
     defaults.resolution = Math.max(flexsearch.resolution, flexsearch.resolution_ctx);
diff --git a/dist/module/db/indexeddb/index.js b/dist/module/db/indexeddb/index.js
index 1f4f651..00c56e5 100644
--- a/dist/module/db/indexeddb/index.js
+++ b/dist/module/db/indexeddb/index.js
@@ -28,7 +28,7 @@ const Index = create_object();
  */
 
 export default function IdxDB(name, config = {}) {
-    if (!this) {
+    if (!this || this.constructor !== IdxDB) {
         return new IdxDB(name, config);
     }
     if ("object" == typeof name) {
@@ -49,7 +49,7 @@ export default function IdxDB(name, config = {}) {
 
 IdxDB.prototype.mount = function (flexsearch) {
     //if(flexsearch.constructor === Document){
-    if (!flexsearch.encoder) {
+    if (flexsearch.index) {
         return flexsearch.mount(this);
     }
     flexsearch.db = this;
diff --git a/dist/module/db/mongodb/index.js b/dist/module/db/mongodb/index.js
index f4ac562..59d4259 100644
--- a/dist/module/db/mongodb/index.js
+++ b/dist/module/db/mongodb/index.js
@@ -25,7 +25,7 @@ let CLIENT,
  */
 
 export default function MongoDB(name, config = {}) {
-    if (!this) {
+    if (!this || this.constructor !== MongoDB) {
         return new MongoDB(name, config);
     }
     if ("object" == typeof name) {
@@ -51,7 +51,7 @@ export default function MongoDB(name, config = {}) {
 
 MongoDB.prototype.mount = function (flexsearch) {
     //if(flexsearch.constructor === Document){
-    if (!flexsearch.encoder) {
+    if (flexsearch.index) {
         return flexsearch.mount(this);
     }
     flexsearch.db = this;
diff --git a/dist/module/db/postgres/index.js b/dist/module/db/postgres/index.js
index f4713df..5efc5ea 100644
--- a/dist/module/db/postgres/index.js
+++ b/dist/module/db/postgres/index.js
@@ -48,7 +48,7 @@ let DB, TRX;
  */
 
 export default function PostgresDB(name, config = {}) {
-    if (!this) {
+    if (!this || this.constructor !== PostgresDB) {
         return new PostgresDB(name, config);
     }
     if ("object" == typeof name) {
@@ -70,7 +70,7 @@ export default function PostgresDB(name, config = {}) {
 
 PostgresDB.prototype.mount = function (flexsearch) {
     //if(flexsearch.constructor === Document){
-    if (!flexsearch.encoder) {
+    if (flexsearch.index) {
         return flexsearch.mount(this);
     }
     flexsearch.db = this;
diff --git a/dist/module/db/redis/index.js b/dist/module/db/redis/index.js
index cdcdeae..46ac29a 100644
--- a/dist/module/db/redis/index.js
+++ b/dist/module/db/redis/index.js
@@ -23,7 +23,7 @@ let DB, TRX;
  */
 
 export default function RedisDB(name, config = {}) {
-    if (!this) {
+    if (!this || this.constructor !== RedisDB) {
         return new RedisDB(name, config);
     }
     if ("object" == typeof name) {
@@ -50,7 +50,7 @@ export default function RedisDB(name, config = {}) {
 
 RedisDB.prototype.mount = function (flexsearch) {
     //if(flexsearch.constructor === Document){
-    if (!flexsearch.encoder) {
+    if (flexsearch.index) {
         return flexsearch.mount(this);
     }
     flexsearch.db = this;
diff --git a/dist/module/db/sqlite/index.js b/dist/module/db/sqlite/index.js
index 82728eb..d5faa29 100644
--- a/dist/module/db/sqlite/index.js
+++ b/dist/module/db/sqlite/index.js
@@ -45,7 +45,7 @@ const TRX = Object.create(null),
  */
 
 export default function SqliteDB(name, config = {}) {
-    if (!this) {
+    if (!this || this.constructor !== SqliteDB) {
         return new SqliteDB(name, config);
     }
     if ("object" == typeof name) {
@@ -58,7 +58,8 @@ export default function SqliteDB(name, config = {}) {
     //field = "Test-456";
     this.id = config.path || (":memory:" === name ? name : "flexsearch" + (name ? "-" + sanitize(name) : "") + ".sqlite");
     this.field = config.field ? "_" + sanitize(config.field) : "";
-    this.support_tag_search = /* tag? */ /* stringify */ /* stringify */ /* single param */!0 /*await rows.hasNext()*/ /*await rows.hasNext()*/ /*await rows.hasNext()*/;
+    this.support_tag_search = /* tag? */ /* stringify */ /* stringify */ /* single param */!0 /*await rows.hasNext()*/
+    /*await rows.hasNext()*/ /*await rows.hasNext()*/;
     this.db = config.db || Index[this.id] || null;
     this.type = config.type ? types[config.type.toLowerCase()] : "string";
     if (!this.type) throw new Error("Unknown type of ID '" + config.type + "'");
@@ -66,7 +67,7 @@ export default function SqliteDB(name, config = {}) {
 
 SqliteDB.prototype.mount = function (flexsearch) {
     //if(flexsearch.constructor === Document){
-    if (!flexsearch.encoder) {
+    if (flexsearch.index) {
         return flexsearch.mount(this);
     }
     flexsearch.db = this;
diff --git a/dist/module/document.js b/dist/module/document.js
index 00ab69c..567e572 100644
--- a/dist/module/document.js
+++ b/dist/module/document.js
@@ -6,10 +6,11 @@
  * https://github.com/nextapps-de/flexsearch
  */
 
-import { IndexOptions, DocumentOptions, DocumentDescriptor, FieldOptions, StoreOptions } from "./type.js";
+import { IndexOptions, DocumentOptions, DocumentDescriptor, FieldOptions, StoreOptions, EncoderOptions } from "./type.js";
 import StorageInterface from "./db/interface.js";
 import Index from "./index.js";
 import WorkerIndex from "./worker.js";
+import Encoder from "./encoder.js";
 import Cache, { searchCache } from "./cache.js";
 import { is_string, is_object, parse_simple } from "./common.js";
 import apply_async from "./async.js";
@@ -54,18 +55,12 @@ export default function Document(options) {
     // is just a wrapper over .search()
     options.cache = /* suggest */ /* append: */ /* enrich */!1;
 
-    this.worker = options.worker;
+    this.worker = options.worker || !1;
 
     this.priority = options.priority || 4;
 
-    // if(SUPPORT_ASYNC){
-    //     // this switch is used by recall of promise callbacks
-    //     this.async = false;
-    // }
-
     /**
      * @type {Map<string, Index>}
-     * @export
      */
     this.index = parse_descriptor.call(this, options, document);
 
@@ -113,13 +108,27 @@ export default function Document(options) {
         }
         if (promises.length) {
             const self = this;
-            return Promise.all(promises).then(function (promises) {
+            return Promise.all(promises).then(function (result) {
+                const encoder_last = new Map();
                 let count = 0;
                 for (const item of self.index.entries()) {
-                    const key = /** @type {string} */item[0],
-                          index = item[1];
+                    const key = /** @type {string} */item[0];
+                    let index = item[1];
+                    if (index.then) {
+                        // make encoder available for result highlighting
+                        let opt = promises[count].encoder || {},
+                            encoder = encoder_last.get(opt);
+                        // handle shared encoders
 
-                    index.then && self.index.set(key, promises[count++]);
+                        if (!encoder) {
+                            encoder = opt.encode ? opt : new Encoder(opt);
+                            encoder_last.set(opt, encoder);
+                        }
+                        index = result[count];
+                        index.encoder = encoder;
+                        self.index.set(key, index);
+                        count++;
+                    }
                 }
                 return self;
             });
@@ -127,7 +136,6 @@ export default function Document(options) {
     } else {
         if (options.db) {
             this.fastupdate = !1;
-            // think about to return the promise here
             // actually it can be awaited on "await index.db"
             this.mount(options.db);
         }
@@ -136,7 +144,7 @@ export default function Document(options) {
 
 /**
  * @param {!StorageInterface} db
- * @return {Promise<Array<?>>}
+ * @return {Promise<void>}
  */
 Document.prototype.mount = function (db) {
 
@@ -191,9 +199,10 @@ Document.prototype.mount = function (db) {
         }
     }
 
-    //this.async = true;
-    this.db = !0;
-    return Promise.all(promises);
+    const self = this;
+    return this.db = Promise.all(promises).then(function () {
+        self.db = !0;
+    });
 };
 
 Document.prototype.commit = async function (replace, append) {
@@ -246,6 +255,8 @@ function parse_descriptor(options, document) {
         if (this.worker) {
             const worker = new WorkerIndex(opt);
             if (worker) {
+                // assign encoder for result highlighting
+                worker.encoder = opt.encoder;
                 // worker could be a promise
                 // it needs to be resolved and swapped later
                 index.set(key, worker);
diff --git a/dist/module/serialize.js b/dist/module/serialize.js
index e92750c..2fb84aa 100644
--- a/dist/module/serialize.js
+++ b/dist/module/serialize.js
@@ -232,7 +232,8 @@ export function importIndex(key, data) {
         case "reg":
 
             // fast update isn't supported by export/import
-            this.fastupdate = /* suggest */ /* append: */ /* enrich */ /* resolve: */!1;
+            this.fastupdate = /* suggest */
+            /* append: */ /* enrich */ /* resolve: */!1;
             this.reg = json_to_reg( /** @type {Array<string|number>} */data, this.reg);
             break;
 
diff --git a/package-lock.json b/package-lock.json
index 1709b69..913339a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "flexsearch",
-  "version": "0.8.155",
+  "version": "0.8.156",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "flexsearch",
-      "version": "0.8.155",
+      "version": "0.8.156",
       "funding": [
         {
           "type": "github",
diff --git a/package.json b/package.json
index 6fe8271..98c2043 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "public": true,
   "preferGlobal": false,
   "name": "flexsearch",
-  "version": "0.8.155",
+  "version": "0.8.156",
   "description": "Next-Generation full-text search library for Browser and Node.js",
   "homepage": "https://github.com/nextapps-de/flexsearch/",
   "author": "Thomas Wilkerling",
diff --git a/src/db/clickhouse/index.js b/src/db/clickhouse/index.js
index 8c913e9..9ee8840 100644
--- a/src/db/clickhouse/index.js
+++ b/src/db/clickhouse/index.js
@@ -55,7 +55,7 @@ let Index;
  */
 
 export default function ClickhouseDB(name, config = {}){
-    if(!this){
+    if(!this || this.constructor !== ClickhouseDB){
         return new ClickhouseDB(name, config);
     }
     if(typeof name === "object"){
@@ -82,7 +82,7 @@ export default function ClickhouseDB(name, config = {}){
 
 ClickhouseDB.prototype.mount = function(flexsearch){
     //if(flexsearch.constructor === Document){
-    if(!flexsearch.encoder){
+    if(flexsearch.index){
         return flexsearch.mount(this);
     }
     defaults.resolution = Math.max(flexsearch.resolution, flexsearch.resolution_ctx);
diff --git a/src/db/indexeddb/index.js b/src/db/indexeddb/index.js
index 6842441..b44841d 100644
--- a/src/db/indexeddb/index.js
+++ b/src/db/indexeddb/index.js
@@ -50,7 +50,7 @@ const Index = create_object();
  */
 
 export default function IdxDB(name, config = {}){
-    if(!this){
+    if(!this || this.constructor !== IdxDB){
         return new IdxDB(name, config);
     }
     if(typeof name === "object"){
@@ -71,7 +71,7 @@ export default function IdxDB(name, config = {}){
 
 IdxDB.prototype.mount = function(flexsearch){
     //if(flexsearch.constructor === Document){
-    if(!flexsearch.encoder){
+    if(flexsearch.index){
         return flexsearch.mount(this);
     }
     flexsearch.db = this;
diff --git a/src/db/mongodb/index.js b/src/db/mongodb/index.js
index 39d41c9..7d8b8d2 100644
--- a/src/db/mongodb/index.js
+++ b/src/db/mongodb/index.js
@@ -23,7 +23,7 @@ let Index = Object.create(null);
  */
 
 export default function MongoDB(name, config = {}){
-    if(!this){
+    if(!this || this.constructor !== MongoDB){
         return new MongoDB(name, config);
     }
     if(typeof name === "object"){
@@ -49,7 +49,7 @@ export default function MongoDB(name, config = {}){
 
 MongoDB.prototype.mount = function(flexsearch){
     //if(flexsearch.constructor === Document){
-    if(!flexsearch.encoder){
+    if(flexsearch.index){
         return flexsearch.mount(this);
     }
     flexsearch.db = this;
diff --git a/src/db/postgres/index.js b/src/db/postgres/index.js
index 5c6f17d..fc55ef7 100644
--- a/src/db/postgres/index.js
+++ b/src/db/postgres/index.js
@@ -48,7 +48,7 @@ let DB, TRX;
  */
 
 export default function PostgresDB(name, config = {}){
-    if(!this){
+    if(!this || this.constructor !== PostgresDB){
         return new PostgresDB(name, config);
     }
     if(typeof name === "object"){
@@ -70,7 +70,7 @@ export default function PostgresDB(name, config = {}){
 
 PostgresDB.prototype.mount = function(flexsearch){
     //if(flexsearch.constructor === Document){
-    if(!flexsearch.encoder){
+    if(flexsearch.index){
         return flexsearch.mount(this);
     }
     flexsearch.db = this;
diff --git a/src/db/redis/index.js b/src/db/redis/index.js
index 3ddf01c..7ee0a5e 100644
--- a/src/db/redis/index.js
+++ b/src/db/redis/index.js
@@ -22,7 +22,7 @@ let DB, TRX;
  */
 
 export default function RedisDB(name, config = {}){
-    if(!this){
+    if(!this || this.constructor !== RedisDB){
         return new RedisDB(name, config);
     }
     if(typeof name === "object"){
@@ -49,7 +49,7 @@ export default function RedisDB(name, config = {}){
 
 RedisDB.prototype.mount = function(flexsearch){
     //if(flexsearch.constructor === Document){
-    if(!flexsearch.encoder){
+    if(flexsearch.index){
         return flexsearch.mount(this);
     }
     flexsearch.db = this;
diff --git a/src/db/sqlite/index.js b/src/db/sqlite/index.js
index 9f83589..fe2dc84 100644
--- a/src/db/sqlite/index.js
+++ b/src/db/sqlite/index.js
@@ -43,7 +43,7 @@ const Index = Object.create(null);
  */
 
 export default function SqliteDB(name, config = {}){
-    if(!this){
+    if(!this || this.constructor !== SqliteDB){
         return new SqliteDB(name, config);
     }
     if(typeof name === "object"){
@@ -68,7 +68,7 @@ export default function SqliteDB(name, config = {}){
 
 SqliteDB.prototype.mount = function(flexsearch){
     //if(flexsearch.constructor === Document){
-    if(!flexsearch.encoder){
+    if(flexsearch.index){
         return flexsearch.mount(this);
     }
     flexsearch.db = this;
diff --git a/src/document.js b/src/document.js
index b298167..8546bfb 100644
--- a/src/document.js
+++ b/src/document.js
@@ -20,10 +20,18 @@ import {
 } from "./config.js";
 // <-- COMPILER BLOCK
 
-import { IndexOptions, DocumentOptions, DocumentDescriptor, FieldOptions, StoreOptions } from "./type.js";
+import {
+    IndexOptions,
+    DocumentOptions,
+    DocumentDescriptor,
+    FieldOptions,
+    StoreOptions,
+    EncoderOptions
+} from "./type.js";
 import StorageInterface from "./db/interface.js";
 import Index from "./index.js";
 import WorkerIndex from "./worker.js";
+import Encoder from "./encoder.js";
 import Cache, { searchCache } from "./cache.js";
 import { is_string, is_object, parse_simple } from "./common.js";
 import apply_async from "./async.js";
@@ -81,21 +89,15 @@ export default function Document(options){
     }
 
     if(SUPPORT_WORKER){
-        this.worker = options.worker;
+        this.worker = options.worker || false;
     }
 
     if(SUPPORT_ASYNC){
         this.priority = options.priority || 4;
     }
 
-    // if(SUPPORT_ASYNC){
-    //     // this switch is used by recall of promise callbacks
-    //     this.async = false;
-    // }
-
     /**
      * @type {Map<string, Index>}
-     * @export
      */
     this.index = parse_descriptor.call(this, options, document);
 
@@ -146,12 +148,28 @@ export default function Document(options){
         }
         if(promises.length){
             const self = this;
-            return Promise.all(promises).then(function(promises){
+            return Promise.all(promises).then(function(result){
+                const encoder_last = new Map();
                 let count = 0;
                 for(const item of self.index.entries()){
                     const key = /** @type {string} */ (item[0]);
-                    const index = item[1];
-                    index.then && self.index.set(key, promises[count++]);
+                    let index = item[1];
+                    if(index.then){
+                        // make encoder available for result highlighting
+                        let opt = promises[count].encoder || {};
+                        // handle shared encoders
+                        let encoder = encoder_last.get(opt);
+                        if(!encoder){
+                            encoder = opt.encode
+                                ? opt
+                                : new Encoder(opt);
+                            encoder_last.set(opt, encoder);
+                        }
+                        index = result[count];
+                        index.encoder = encoder;
+                        self.index.set(key, index);
+                        count++;
+                    }
                 }
                 return self;
             });
@@ -160,7 +178,6 @@ export default function Document(options){
     else if(SUPPORT_PERSISTENT){
         if(options.db){
             this.fastupdate = false;
-            // think about to return the promise here
             // actually it can be awaited on "await index.db"
             this.mount(options.db);
         }
@@ -171,7 +188,7 @@ if(SUPPORT_PERSISTENT){
 
     /**
      * @param {!StorageInterface} db
-     * @return {Promise<Array<?>>}
+     * @return {Promise<void>}
      */
     Document.prototype.mount = function(db){
 
@@ -232,9 +249,10 @@ if(SUPPORT_PERSISTENT){
             }
         }
 
-        //this.async = true;
-        this.db = true;
-        return Promise.all(promises);
+        const self = this;
+        return this.db = Promise.all(promises).then(function(){
+            self.db = true;
+        });
     };
 
     Document.prototype.commit = async function(replace, append){
@@ -292,6 +310,8 @@ function parse_descriptor(options, document){
         if(SUPPORT_WORKER && this.worker){
             const worker = new WorkerIndex(opt);
             if(worker){
+                // assign encoder for result highlighting
+                worker.encoder = opt.encoder;
                 // worker could be a promise
                 // it needs to be resolved and swapped later
                 index.set(key, worker);
diff --git a/test/highlight.js b/test/highlight.js
index dd2b2bf..b470ebd 100644
--- a/test/highlight.js
+++ b/test/highlight.js
@@ -9,10 +9,11 @@ const build_light = env && env.includes(".light");
 const build_compact = env && env.includes(".compact");
 const build_esm = !env || env.startsWith("module");
 const Charset = _Charset || (await import("../src/charset.js")).default;
+import SQLite from "flexsearch/db/sqlite";
 
 if(!build_light) describe("Result Highlighting", function(){
 
-    it("Should have been indexed properly", function(){
+    it("Should have been highlighted results properly (Document)", function(){
 
         // some test data
         const data = [{
@@ -25,6 +26,7 @@ if(!build_light) describe("Result Highlighting", function(){
 
         // create the document index
         const index = new Document({
+            cache: true,
             document: {
                 store: true,
                 index: [{
@@ -41,7 +43,7 @@ if(!build_light) describe("Result Highlighting", function(){
         }
 
         // perform a query
-        const result = index.search({
+        let result = index.searchCache({
             query: "karmen or clown or not found",
             suggest: true,
             // set enrich to true (required)
@@ -60,9 +62,147 @@ if(!build_light) describe("Result Highlighting", function(){
             doc: data[1],
             highlight: 'Le <b>clown</b> et ses chiens'
         }]);
+
+        // perform a query on cache
+        result = index.searchCache({
+            query: "karmen or clown or not found",
+            suggest: true,
+            // set enrich to true (required)
+            enrich: true,
+            // highlight template
+            // $1 is a placeholder for the matched partial
+            highlight: "<b>$1</b>"
+        });
+
+        expect(result[0].result).to.eql([{
+            id: 1,
+            doc: data[0],
+            highlight: '<b>Carmen</b>cita'
+        },{
+            id: 2,
+            doc: data[1],
+            highlight: 'Le <b>clown</b> et ses chiens'
+        }]);
+
+        // perform a query using pluck
+        result = index.search({
+            query: "karmen or clown or not found",
+            suggest: true,
+            // set enrich to true (required)
+            enrich: true,
+            pluck: "title",
+            // highlight template
+            // $1 is a placeholder for the matched partial
+            highlight: "<b>$1</b>"
+        });
+
+        expect(result).to.eql([{
+            id: 1,
+            doc: data[0],
+            highlight: '<b>Carmen</b>cita'
+        },{
+            id: 2,
+            doc: data[1],
+            highlight: 'Le <b>clown</b> et ses chiens'
+        }]);
     });
 
-    it("Should have been indexed properly (#480)", function(){
+    if(!build_compact) it("Should have been highlighted results properly (Document Worker)", async function(){
+
+        // some test data
+        const data = [{
+            "id": 1,
+            "title": "Carmencita"
+        },{
+            "id": 2,
+            "title": "Le clown et ses chiens"
+        }];
+
+        // create the document index
+        const index = await new Document({
+            cache: true,
+            worker: true,
+            document: {
+                store: true,
+                index: [{
+                    field: "title",
+                    tokenize: "forward",
+                    encoder: Charset.LatinBalance
+                }]
+            }
+        });
+
+        // add test data
+        for(let i = 0; i < data.length; i++){
+            await index.add(data[i]);
+        }
+
+        // perform a query
+        let result = await index.searchCache({
+            query: "karmen or clown or not found",
+            suggest: true,
+            // set enrich to true (required)
+            enrich: true,
+            // highlight template
+            // $1 is a placeholder for the matched partial
+            highlight: "<b>$1</b>"
+        });
+
+        expect(result[0].result).to.eql([{
+            id: 1,
+            doc: data[0],
+            highlight: '<b>Carmen</b>cita'
+        },{
+            id: 2,
+            doc: data[1],
+            highlight: 'Le <b>clown</b> et ses chiens'
+        }]);
+
+        // perform a query on cache
+        result = await index.searchCache({
+            query: "karmen or clown or not found",
+            suggest: true,
+            // set enrich to true (required)
+            enrich: true,
+            // highlight template
+            // $1 is a placeholder for the matched partial
+            highlight: "<b>$1</b>"
+        });
+
+        expect(result[0].result).to.eql([{
+            id: 1,
+            doc: data[0],
+            highlight: '<b>Carmen</b>cita'
+        },{
+            id: 2,
+            doc: data[1],
+            highlight: 'Le <b>clown</b> et ses chiens'
+        }]);
+
+        // perform a query using pluck
+        result = await index.search({
+            query: "karmen or clown or not found",
+            suggest: true,
+            // set enrich to true (required)
+            enrich: true,
+            pluck: "title",
+            // highlight template
+            // $1 is a placeholder for the matched partial
+            highlight: "<b>$1</b>"
+        });
+
+        expect(result).to.eql([{
+            id: 1,
+            doc: data[0],
+            highlight: '<b>Carmen</b>cita'
+        },{
+            id: 2,
+            doc: data[1],
+            highlight: 'Le <b>clown</b> et ses chiens'
+        }]);
+    });
+
+    it("Should have been highlighted results properly (#480)", function(){
 
         const index = new Document({
             document: {
@@ -104,7 +244,6 @@ if(!build_light) describe("Result Highlighting", function(){
             highlight: "<b>$1</b>"
         });
 
-
         expect(result.length).to.equal(2);
         expect(result[0]).to.eql({
             field: "title",
diff --git a/test/persistent.js b/test/persistent.js
index e12ccdc..09ce98a 100644
--- a/test/persistent.js
+++ b/test/persistent.js
@@ -368,4 +368,147 @@ export default function(DB, DBClass){
             index.db.close();
         }
     });
-}
\ No newline at end of file
+
+    it("Result Highlighting", async function(){
+
+        // some test data
+        const data = [{
+            "id": 1,
+            "title": "Carmencita"
+        },{
+            "id": 2,
+            "title": "Le clown et ses chiens"
+        }];
+
+        // create the document index
+        const index = new Document({
+            cache: true,
+            db: new DB("test-highlight", {
+                type: "Integer"
+            }),
+            document: {
+                store: true,
+                index: [{
+                    field: "title",
+                    tokenize: "forward",
+                    encoder: Charset.LatinBalance
+                }]
+            }
+        });
+
+        await index.db;
+
+        // add test data
+        for(let i = 0; i < data.length; i++){
+            index.add(data[i]);
+        }
+
+        await index.commit();
+
+        // perform a query
+        let result = await index.searchCache({
+            query: "karmen or clown or not found",
+            suggest: true,
+            // set enrich to true (required)
+            enrich: true,
+            // highlight template
+            // $1 is a placeholder for the matched partial
+            highlight: "<b>$1</b>"
+        });
+
+        // todo Redis has slightly different sorting by aggregation
+        if(result[0].result[0].id === 1){
+            expect(result[0].result).to.eql([{
+                id: 1,
+                doc: data[0],
+                highlight: '<b>Carmen</b>cita'
+            },{
+                id: 2,
+                doc: data[1],
+                highlight: 'Le <b>clown</b> et ses chiens'
+            }]);
+        }
+        else{
+            expect(result[0].result).to.eql([{
+                id: 2,
+                doc: data[1],
+                highlight: 'Le <b>clown</b> et ses chiens'
+            },{
+                id: 1,
+                doc: data[0],
+                highlight: '<b>Carmen</b>cita'
+            }]);
+        }
+
+        // perform a query on cache
+        result = await index.searchCache({
+            query: "karmen or clown or not found",
+            suggest: true,
+            // set enrich to true (required)
+            enrich: true,
+            // highlight template
+            // $1 is a placeholder for the matched partial
+            highlight: "<b>$1</b>"
+        });
+
+        // todo Redis has slightly different sorting by aggregation
+        if(result[0].result[0].id === 1){
+            expect(result[0].result).to.eql([{
+                id: 1,
+                doc: data[0],
+                highlight: '<b>Carmen</b>cita'
+            }, {
+                id: 2,
+                doc: data[1],
+                highlight: 'Le <b>clown</b> et ses chiens'
+            }]);
+        }
+        else{
+            expect(result[0].result).to.eql([{
+                id: 2,
+                doc: data[1],
+                highlight: 'Le <b>clown</b> et ses chiens'
+            },{
+                id: 1,
+                doc: data[0],
+                highlight: '<b>Carmen</b>cita'
+            }]);
+        }
+
+        // perform a query using pluck
+        result = await index.search({
+            query: "karmen or clown or not found",
+            suggest: true,
+            // set enrich to true (required)
+            enrich: true,
+            pluck: "title",
+            // highlight template
+            // $1 is a placeholder for the matched partial
+            highlight: "<b>$1</b>"
+        });
+
+        // todo Redis has slightly different sorting by aggregation
+        if(result[0].id === 1){
+            expect(result).to.eql([{
+                id: 1,
+                doc: data[0],
+                highlight: '<b>Carmen</b>cita'
+            },{
+                id: 2,
+                doc: data[1],
+                highlight: 'Le <b>clown</b> et ses chiens'
+            }]);
+        }
+        else{
+            expect(result).to.eql([{
+                id: 2,
+                doc: data[1],
+                highlight: 'Le <b>clown</b> et ses chiens'
+            },{
+                id: 1,
+                doc: data[0],
+                highlight: '<b>Carmen</b>cita'
+            }]);
+        }
+    });
+}