From b2c79cfd0e0710dd2428d058c073b37f14f4263e Mon Sep 17 00:00:00 2001
From: Thomas Wilkerling <thomas@nextapps.de>
Date: Thu, 20 Mar 2025 09:42:26 +0100
Subject: [PATCH] worker index basic support export/import

---
 README.md                                     |    2 +
 dist/flexsearch.bundle.debug.js               |  501 +++---
 dist/flexsearch.bundle.min.js                 |  118 +-
 dist/flexsearch.bundle.module.debug.js        |  495 +++---
 dist/flexsearch.bundle.module.min.js          |  120 +-
 dist/flexsearch.compact.debug.js              |  508 +++---
 dist/flexsearch.compact.min.js                |   91 +-
 dist/flexsearch.compact.module.debug.js       |  502 +++---
 dist/flexsearch.compact.module.min.js         |   93 +-
 dist/flexsearch.es5.debug.js                  | 1441 +++++++++--------
 dist/flexsearch.es5.min.js                    |  128 +-
 dist/flexsearch.light.debug.js                |  353 ++--
 dist/flexsearch.light.min.js                  |   54 +-
 dist/flexsearch.light.module.debug.js         |  335 ++--
 dist/flexsearch.light.module.min.js           |   54 +-
 dist/module-debug/bundle.js                   |    2 +-
 dist/module-debug/worker.js                   |    9 +-
 dist/module-debug/worker/handler.js           |   38 +-
 dist/module-debug/worker/node.js              |   33 +-
 dist/module-min/bundle.js                     |    2 +-
 dist/module-min/worker.js                     |    2 +-
 dist/module-min/worker/handler.js             |    2 +-
 dist/module-min/worker/node.js                |    2 +-
 dist/module/bundle.js                         |    2 +-
 dist/module/worker.js                         |    9 +-
 dist/module/worker/handler.js                 |   38 +-
 dist/module/worker/node.js                    |   33 +-
 dist/node/node.js                             |   26 +-
 dist/node/node.mjs                            |   24 +-
 doc/0.8.0.md                                  |    6 +-
 .../basic-export-import/index.js              |    2 +
 .../basic-worker-export-import/config.js      |   29 +
 .../basic-worker-export-import/index.js       |   68 +
 .../basic-worker-export-import/package.json   |    6 +
 .../basic-worker-extern-config/config.js      |    4 +-
 .../basic-worker-export-import/config.js      |   29 +
 .../basic-worker-export-import/index.js       |   69 +
 .../basic-worker-export-import/package.json   |    7 +
 package-lock.json                             |    4 +-
 package.json                                  |    2 +-
 src/bundle.js                                 |    4 +-
 src/worker.js                                 |    8 +-
 src/worker/handler.js                         |   35 +-
 src/worker/node.js                            |   26 +-
 src/worker/node.mjs                           |   24 +-
 45 files changed, 3059 insertions(+), 2281 deletions(-)
 create mode 100644 example/nodejs-commonjs/basic-worker-export-import/config.js
 create mode 100644 example/nodejs-commonjs/basic-worker-export-import/index.js
 create mode 100644 example/nodejs-commonjs/basic-worker-export-import/package.json
 create mode 100644 example/nodejs-esm/basic-worker-export-import/config.js
 create mode 100644 example/nodejs-esm/basic-worker-export-import/index.js
 create mode 100644 example/nodejs-esm/basic-worker-export-import/package.json

diff --git a/README.md b/README.md
index 244b2a7..1a61300 100644
--- a/README.md
+++ b/README.md
@@ -679,6 +679,7 @@ The `worker` inherits from type `Index` and does not inherit from type `Document
     - [basic-resolver](example/nodejs-commonjs/basic-resolver)
     - [basic-worker](example/nodejs-commonjs/basic-worker)
     - [basic-worker-extern-config](example/nodejs-commonjs/basic-worker-extern-config)
+    - [basic-worker-export-import](example/nodejs-commonjs/basic-worker-export-import)
     - [basic-export-import](example/nodejs-commonjs/basic-export-import)
     - [document](example/nodejs-commonjs/document)
     - [document-persistent](example/nodejs-commonjs/document-persistent)
@@ -693,6 +694,7 @@ The `worker` inherits from type `Index` and does not inherit from type `Document
     - [basic-resolver](example/nodejs-esm/basic-resolver)
     - [basic-worker](example/nodejs-esm/basic-worker)
     - [basic-worker-extern-config](example/nodejs-esm/basic-worker-extern-config)
+    - [basic-worker-export-import](example/nodejs-esm/basic-worker-export-import)
     - [basic-export-import](example/nodejs-esm/basic-export-import)
     - [document](example/nodejs-esm/document)
     - [document-persistent](example/nodejs-esm/document-persistent)
diff --git a/dist/flexsearch.bundle.debug.js b/dist/flexsearch.bundle.debug.js
index e81f71b..8c897d9 100644
--- a/dist/flexsearch.bundle.debug.js
+++ b/dist/flexsearch.bundle.debug.js
@@ -1,5 +1,5 @@
 /**!
- * FlexSearch.js v0.8.107 (Bundle/Debug)
+ * FlexSearch.js v0.8.108 (Bundle/Debug)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
@@ -269,89 +269,36 @@ function L(a) {
   a.B.clear();
   a.G.clear();
 }
-;async function ka(a) {
+;let M, N;
+async function ka(a) {
   a = a.data;
-  var b = self._index;
-  const c = a.args;
-  var e = a.task;
-  switch(e) {
+  const b = a.task, c = a.id;
+  let e = a.args;
+  switch(b) {
     case "init":
-      e = a.options || {};
-      (b = a.factory) ? (Function("return " + b)()(self), self._index = new self.FlexSearch.Index(e), delete self.FlexSearch) : self._index = new M(e);
-      postMessage({id:a.id});
+      N = a.options || {};
+      (a = a.factory) ? (Function("return " + a)()(self), M = new self.FlexSearch.Index(N), delete self.FlexSearch) : M = new O(N);
+      postMessage({id:c});
       break;
     default:
-      a = a.id, b = b[e].apply(b, c), postMessage("search" === e ? {id:a, msg:b} : {id:a});
+      let d;
+      "export" === b && (e = [N.export]);
+      "import" === b ? await N.import.call(M, M) : d = M[b].apply(M, e);
+      postMessage("search" === b ? {id:c, msg:d} : {id:c});
   }
 }
-;let la = 0;
-function N(a = {}) {
-  function b(g) {
-    function k(h) {
-      h = h.data || h;
-      const l = h.id, m = l && d.h[l];
-      m && (m(h.msg), delete d.h[l]);
-    }
-    this.worker = g;
-    this.h = B();
-    if (this.worker) {
-      e ? this.worker.on("message", k) : this.worker.onmessage = k;
-      if (a.config) {
-        return new Promise(function(h) {
-          d.h[++la] = function() {
-            h(d);
-          };
-          d.worker.postMessage({id:la, task:"init", factory:c, options:a});
-        });
-      }
-      this.worker.postMessage({task:"init", factory:c, options:a});
-      return this;
-    }
-  }
-  if (!this || this.constructor !== N) {
-    return new N(a);
-  }
-  let c = "undefined" !== typeof self ? self._factory : "undefined" !== typeof window ? window._factory : null;
-  c && (c = c.toString());
-  const e = "undefined" === typeof window, d = this, f = ma(c, e, a.worker);
-  return f.then ? f.then(function(g) {
-    return b.call(d, g);
-  }) : b.call(this, f);
-}
-O("add");
-O("append");
-O("search");
-O("update");
-O("remove");
-function O(a) {
-  N.prototype[a] = N.prototype[a + "Async"] = async function() {
-    const b = this, c = [].slice.call(arguments);
-    var e = c[c.length - 1];
-    let d;
-    "function" === typeof e && (d = e, c.splice(c.length - 1, 1));
-    e = new Promise(function(f) {
-      b.h[++la] = f;
-      b.worker.postMessage({task:a, id:la, args:c});
-    });
-    return d ? (e.then(d), this) : e;
-  };
-}
-function ma(a, b, c) {
-  return b ? "undefined" !== typeof module ? new (require("worker_threads")["Worker"])(__dirname + "/node/node.js") : import("worker_threads").then(function(worker){ return new worker["Worker"]((1,eval)("import.meta.dirname") + "/node/node.mjs"); }) : a ? new window.Worker(URL.createObjectURL(new Blob(["onmessage=" + ka.toString()], {type:"text/javascript"}))) : new window.Worker(E(c) ? c : (0,eval)("import.meta.url").replace("/worker.js", "/worker/worker.js").replace("flexsearch.bundle.module.min.js", 
-  "module/worker/worker.js"), {type:"module"});
-}
-;function na(a) {
+;function la(a) {
   P.call(a, "add");
   P.call(a, "append");
   P.call(a, "search");
   P.call(a, "update");
   P.call(a, "remove");
 }
-let Q, oa;
-const pa = {}, R = {};
+let ma, na;
+const oa = {}, pa = {};
 function qa(a) {
-  Q = 0;
-  pa[a] = R[a];
+  ma = 0;
+  oa[a] = pa[a];
 }
 function P(a) {
   this[a + "Async"] = function() {
@@ -359,11 +306,11 @@ function P(a) {
     var c = b[b.length - 1];
     let e;
     "function" === typeof c && (e = c, delete b[b.length - 1]);
-    Q || (Q = setTimeout(qa, 0, a), oa = Date.now());
-    R[a] || (R[a] = pa[a] = 1000);
-    if (!--pa[a]) {
-      pa[a] = R[a] = R[a] * this.priority * this.priority * 3 / (Date.now() - oa) | 0 || 1;
-      Q = clearTimeout(Q);
+    ma || (ma = setTimeout(qa, 0, a), na = Date.now());
+    pa[a] || (pa[a] = oa[a] = 1000);
+    if (!--oa[a]) {
+      oa[a] = pa[a] = pa[a] * this.priority * this.priority * 3 / (Date.now() - na) | 0 || 1;
+      ma = clearTimeout(ma);
       const f = this;
       return new Promise(g => {
         setTimeout(function() {
@@ -377,7 +324,67 @@ function P(a) {
     return c;
   };
 }
-;function ra(a, b = 0) {
+;let ra = 0;
+function Q(a = {}) {
+  function b(g) {
+    function k(h) {
+      h = h.data || h;
+      const l = h.id, m = l && d.h[l];
+      m && (m(h.msg), delete d.h[l]);
+    }
+    this.worker = g;
+    this.h = B();
+    if (this.worker) {
+      e ? this.worker.on("message", k) : this.worker.onmessage = k;
+      if (a.config) {
+        return new Promise(function(h) {
+          d.h[++ra] = function() {
+            h(d);
+          };
+          d.worker.postMessage({id:ra, task:"init", factory:c, options:a});
+        });
+      }
+      this.worker.postMessage({task:"init", factory:c, options:a});
+      return this;
+    }
+  }
+  if (!this || this.constructor !== Q) {
+    return new Q(a);
+  }
+  let c = "undefined" !== typeof self ? self._factory : "undefined" !== typeof window ? window._factory : null;
+  c && (c = c.toString());
+  const e = "undefined" === typeof window, d = this, f = sa(c, e, a.worker);
+  return f.then ? f.then(function(g) {
+    return b.call(d, g);
+  }) : b.call(this, f);
+}
+R("add");
+R("append");
+R("search");
+R("update");
+R("remove");
+R("clear");
+R("export");
+R("import");
+la(Q.prototype);
+function R(a) {
+  Q.prototype[a] = async function() {
+    const b = this, c = [].slice.call(arguments);
+    var e = c[c.length - 1];
+    let d;
+    "function" === typeof e && (d = e, c.splice(c.length - 1, 1));
+    e = new Promise(function(f) {
+      b.h[++ra] = f;
+      b.worker.postMessage({task:a, id:ra, args:c});
+    });
+    return d ? (e.then(d), this) : e;
+  };
+}
+function sa(a, b, c) {
+  return b ? "undefined" !== typeof module ? new (require("worker_threads")["Worker"])(__dirname + "/node/node.js") : import("worker_threads").then(function(worker){ return new worker["Worker"]((1,eval)("import.meta.dirname") + "/node/node.mjs"); }) : a ? new window.Worker(URL.createObjectURL(new Blob(["onmessage=" + ka.toString()], {type:"text/javascript"}))) : new window.Worker(E(c) ? c : (0,eval)("import.meta.url").replace("/worker.js", "/worker/worker.js").replace("flexsearch.bundle.module.min.js", 
+  "module/worker/worker.js"), {type:"module"});
+}
+;function ta(a, b = 0) {
   let c = [], e = [];
   b && (b = 250000 / b * 5000 | 0);
   for (const d of a.entries()) {
@@ -386,30 +393,30 @@ function P(a) {
   e.length && c.push(e);
   return c;
 }
-function sa(a, b) {
+function ua(a, b) {
   b || (b = new Map());
   for (let c = 0, e; c < a.length; c++) {
     e = a[c], b.set(e[0], e[1]);
   }
   return b;
 }
-function ta(a, b = 0) {
+function va(a, b = 0) {
   let c = [], e = [];
   b && (b = 250000 / b * 1000 | 0);
   for (const d of a.entries()) {
-    e.push([d[0], ra(d[1])[0]]), e.length === b && (c.push(e), e = []);
+    e.push([d[0], ta(d[1])[0]]), e.length === b && (c.push(e), e = []);
   }
   e.length && c.push(e);
   return c;
 }
-function ua(a, b) {
+function wa(a, b) {
   b || (b = new Map());
   for (let c = 0, e, d; c < a.length; c++) {
-    e = a[c], d = b.get(e[0]), b.set(e[0], sa(e[1], d));
+    e = a[c], d = b.get(e[0]), b.set(e[0], ua(e[1], d));
   }
   return b;
 }
-function va(a) {
+function xa(a) {
   let b = [], c = [];
   for (const e of a.keys()) {
     c.push(e), 250000 === c.length && (b.push(c), c = []);
@@ -417,14 +424,14 @@ function va(a) {
   c.length && b.push(c);
   return b;
 }
-function wa(a, b) {
+function ya(a, b) {
   b || (b = new Set());
   for (let c = 0; c < a.length; c++) {
     b.add(a[c]);
   }
   return b;
 }
-function xa(a, b, c, e, d, f, g = 0) {
+function za(a, b, c, e, d, f, g = 0) {
   const k = e && e.constructor === Array;
   var h = k ? e.shift() : e;
   if (!h) {
@@ -433,12 +440,12 @@ function xa(a, b, c, e, d, f, g = 0) {
   if ((h = a((b ? b + "." : "") + (g + 1) + "." + c, JSON.stringify(h))) && h.then) {
     const l = this;
     return h.then(function() {
-      return xa.call(l, a, b, c, k ? e : null, d, f, g + 1);
+      return za.call(l, a, b, c, k ? e : null, d, f, g + 1);
     });
   }
-  return xa.call(this, a, b, c, k ? e : null, d, f, g + 1);
+  return za.call(this, a, b, c, k ? e : null, d, f, g + 1);
 }
-;function ya(a, b, c, e) {
+;function Aa(a, b, c, e) {
   let d = [];
   for (let f = 0, g; f < a.index.length; f++) {
     if (g = a.index[f], b >= g.length) {
@@ -504,12 +511,12 @@ function S(a) {
     }
     if ("slice" === e) {
       return function(d, f) {
-        return ya(b, d || 0, f || b.length, !1);
+        return Aa(b, d || 0, f || b.length, !1);
       };
     }
     if ("splice" === e) {
       return function(d, f) {
-        return ya(b, d || 0, f || b.length, !0);
+        return Aa(b, d || 0, f || b.length, !0);
       };
     }
     if ("constructor" === e) {
@@ -540,7 +547,7 @@ function T(a = 8) {
   this.index = B();
   this.B = [];
   this.size = 0;
-  32 < a ? (this.h = za, this.A = BigInt(a)) : (this.h = Aa, this.A = a);
+  32 < a ? (this.h = Ba, this.A = BigInt(a)) : (this.h = Ca, this.A = a);
 }
 T.prototype.get = function(a) {
   const b = this.index[this.h(a)];
@@ -557,7 +564,7 @@ function U(a = 8) {
   }
   this.index = B();
   this.h = [];
-  32 < a ? (this.B = za, this.A = BigInt(a)) : (this.B = Aa, this.A = a);
+  32 < a ? (this.B = Ba, this.A = BigInt(a)) : (this.B = Ca, this.A = a);
 }
 U.prototype.add = function(a) {
   var b = this.B(a);
@@ -599,7 +606,7 @@ t.entries = U.prototype.entries = function*() {
     }
   }
 };
-function Aa(a) {
+function Ca(a) {
   let b = 2 ** this.A - 1;
   if ("number" == typeof a) {
     return a & b;
@@ -610,7 +617,7 @@ function Aa(a) {
   }
   return 32 === this.A ? c + 2 ** 31 : c;
 }
-function za(a) {
+function Ba(a) {
   let b = BigInt(2) ** this.A - BigInt(1);
   var c = typeof a;
   if ("bigint" === c) {
@@ -640,7 +647,7 @@ function za(a) {
         d && e.add(a, d, !1, !0);
       } else {
         if (d = h.I, !d || d(b)) {
-          h.constructor === String ? h = ["" + h] : E(h) && (h = [h]), Ba(b, h, this.J, 0, e, a, h[0], c);
+          h.constructor === String ? h = ["" + h] : E(h) && (h = [h]), Da(b, h, this.J, 0, e, a, h[0], c);
         }
       }
     }
@@ -703,7 +710,7 @@ function za(a) {
             k[l] = b[l];
             continue;
           }
-          Ca(b, k, l, 0, l[0], m);
+          Ea(b, k, l, 0, l[0], m);
         }
       }
       this.store.set(a, k || b);
@@ -711,21 +718,21 @@ function za(a) {
   }
   return this;
 };
-function Ca(a, b, c, e, d, f) {
+function Ea(a, b, c, e, d, f) {
   a = a[d];
   if (e === c.length - 1) {
     b[d] = f || a;
   } else if (a) {
     if (a.constructor === Array) {
       for (b = b[d] = Array(a.length), d = 0; d < a.length; d++) {
-        Ca(a, b, c, e, d);
+        Ea(a, b, c, e, d);
       }
     } else {
-      b = b[d] || (b[d] = B()), d = c[++e], Ca(a, b, c, e, d);
+      b = b[d] || (b[d] = B()), d = c[++e], Ea(a, b, c, e, d);
     }
   }
 }
-function Ba(a, b, c, e, d, f, g, k) {
+function Da(a, b, c, e, d, f, g, k) {
   if (a = a[g]) {
     if (e === b.length - 1) {
       if (a.constructor === Array) {
@@ -741,17 +748,17 @@ function Ba(a, b, c, e, d, f, g, k) {
     } else {
       if (a.constructor === Array) {
         for (g = 0; g < a.length; g++) {
-          Ba(a, b, c, e, d, f, g, k);
+          Da(a, b, c, e, d, f, g, k);
         }
       } else {
-        g = b[++e], Ba(a, b, c, e, d, f, g, k);
+        g = b[++e], Da(a, b, c, e, d, f, g, k);
       }
     }
   } else {
     d.db && d.remove(f);
   }
 }
-;function Da(a, b, c, e, d, f, g) {
+;function Fa(a, b, c, e, d, f, g) {
   const k = a.length;
   let h = [], l;
   var m;
@@ -767,7 +774,7 @@ function Ba(a, b, c, e, d, f, g, k) {
   }
   if (a = h.length) {
     if (d) {
-      h = 1 < h.length ? Ea(h, c, e, g, f) : (h = h[0]).length > c || e ? h.slice(e, c + e) : h;
+      h = 1 < h.length ? Ga(h, c, e, g, f) : (h = h[0]).length > c || e ? h.slice(e, c + e) : h;
     } else {
       if (a < k) {
         return [];
@@ -800,7 +807,7 @@ function Ba(a, b, c, e, d, f, g, k) {
   }
   return h;
 }
-function Ea(a, b, c, e, d) {
+function Ga(a, b, c, e, d) {
   const f = [], g = B();
   let k;
   var h = a.length;
@@ -845,7 +852,7 @@ function Ea(a, b, c, e, d) {
   }
   return f;
 }
-function Fa(a, b, c) {
+function Ha(a, b, c) {
   const e = B(), d = [];
   for (let f = 0, g; f < b.length; f++) {
     g = b[f];
@@ -866,7 +873,7 @@ function Fa(a, b, c) {
   }
   return d;
 }
-;function Ga(a, b, c, e) {
+;function Ia(a, b, c, e) {
   if (!a.length) {
     return a;
   }
@@ -897,7 +904,7 @@ function Fa(a, b, c) {
   d = 1 < d.length ? [].concat.apply([], d) : d[0];
   return e ? W.call(this, d) : d;
 }
-;function Ha(a, b, c) {
+;function Ja(a, b, c) {
   var e = c[0];
   if (e.then) {
     return Promise.all(c).then(function(m) {
@@ -944,10 +951,10 @@ function Fa(a, b, c) {
   return {O:e, P:d, limit:f, offset:g, enrich:k, resolve:h, suggest:l};
 }
 ;X.prototype.or = function() {
-  const {O:a, P:b, limit:c, offset:e, enrich:d, resolve:f} = Ha(this, "or", arguments);
-  return Ia.call(this, a, b, c, e, d, f);
+  const {O:a, P:b, limit:c, offset:e, enrich:d, resolve:f} = Ja(this, "or", arguments);
+  return Ka.call(this, a, b, c, e, d, f);
 };
-function Ia(a, b, c, e, d, f) {
+function Ka(a, b, c, e, d, f) {
   if (b.length) {
     const g = this;
     return Promise.all(b).then(function(k) {
@@ -955,10 +962,10 @@ function Ia(a, b, c, e, d, f) {
       for (let h = 0, l; h < k.length; h++) {
         (l = k[h]).length && (a[h] = l);
       }
-      return Ia.call(g, a, [], c, e, d, f);
+      return Ka.call(g, a, [], c, e, d, f);
     });
   }
-  a.length && (this.result.length && a.push(this.result), 2 > a.length ? this.result = a[0] : (this.result = Ea(a, c, e, !1, this.h), e = 0));
+  a.length && (this.result.length && a.push(this.result), 2 > a.length ? this.result = a[0] : (this.result = Ga(a, c, e, !1, this.h), e = 0));
   return f ? this.resolve(c, e, d) : this;
 }
 ;X.prototype.and = function() {
@@ -968,12 +975,12 @@ function Ia(a, b, c, e, d, f) {
     f && (a = !!f.suggest, d = f.resolve, b = f.limit, c = f.offset, e = f.enrich && d);
   }
   if (a) {
-    const {O:f, P:g, limit:k, offset:h, enrich:l, resolve:m, suggest:n} = Ha(this, "and", arguments);
-    return Ja.call(this, f, g, k, h, l, m, n);
+    const {O:f, P:g, limit:k, offset:h, enrich:l, resolve:m, suggest:n} = Ja(this, "and", arguments);
+    return La.call(this, f, g, k, h, l, m, n);
   }
   return d ? this.resolve(b, c, e) : this;
 };
-function Ja(a, b, c, e, d, f, g) {
+function La(a, b, c, e, d, f, g) {
   if (b.length) {
     const k = this;
     return Promise.all(b).then(function(h) {
@@ -981,7 +988,7 @@ function Ja(a, b, c, e, d, f, g) {
       for (let l = 0, m; l < h.length; l++) {
         (m = h[l]).length && (a[l] = m);
       }
-      return Ja.call(k, a, [], c, e, d, f, g);
+      return La.call(k, a, [], c, e, d, f, g);
     });
   }
   if (a.length) {
@@ -989,7 +996,7 @@ function Ja(a, b, c, e, d, f, g) {
       this.result = a[0];
     } else {
       if (b = ca(a)) {
-        return this.result = Da(a, b, c, e, g, this.h, f), f ? d ? W.call(this.index, this.result) : this.result : this;
+        return this.result = Fa(a, b, c, e, g, this.h, f), f ? d ? W.call(this.index, this.result) : this.result : this;
       }
       this.result = [];
     }
@@ -999,10 +1006,10 @@ function Ja(a, b, c, e, d, f, g) {
   return f ? this.resolve(c, e, d) : this;
 }
 ;X.prototype.xor = function() {
-  const {O:a, P:b, limit:c, offset:e, enrich:d, resolve:f, suggest:g} = Ha(this, "xor", arguments);
-  return Ka.call(this, a, b, c, e, d, f, g);
+  const {O:a, P:b, limit:c, offset:e, enrich:d, resolve:f, suggest:g} = Ja(this, "xor", arguments);
+  return Ma.call(this, a, b, c, e, d, f, g);
 };
-function Ka(a, b, c, e, d, f, g) {
+function Ma(a, b, c, e, d, f, g) {
   if (b.length) {
     const k = this;
     return Promise.all(b).then(function(h) {
@@ -1010,21 +1017,21 @@ function Ka(a, b, c, e, d, f, g) {
       for (let l = 0, m; l < h.length; l++) {
         (m = h[l]).length && (a[l] = m);
       }
-      return Ka.call(k, a, [], c, e, d, f, g);
+      return Ma.call(k, a, [], c, e, d, f, g);
     });
   }
   if (a.length) {
     if (this.result.length && a.unshift(this.result), 2 > a.length) {
       this.result = a[0];
     } else {
-      return this.result = La.call(this, a, c, e, f, this.h), f ? d ? W.call(this.index, this.result) : this.result : this;
+      return this.result = Na.call(this, a, c, e, f, this.h), f ? d ? W.call(this.index, this.result) : this.result : this;
     }
   } else {
     g || (this.result = a);
   }
   return f ? this.resolve(c, e, d) : this;
 }
-function La(a, b, c, e, d) {
+function Na(a, b, c, e, d) {
   const f = [], g = B();
   let k = 0;
   for (let h = 0, l; h < a.length; h++) {
@@ -1070,10 +1077,10 @@ function La(a, b, c, e, d) {
   return f;
 }
 ;X.prototype.not = function() {
-  const {O:a, P:b, limit:c, offset:e, enrich:d, resolve:f, suggest:g} = Ha(this, "not", arguments);
-  return Ma.call(this, a, b, c, e, d, f, g);
+  const {O:a, P:b, limit:c, offset:e, enrich:d, resolve:f, suggest:g} = Ja(this, "not", arguments);
+  return Oa.call(this, a, b, c, e, d, f, g);
 };
-function Ma(a, b, c, e, d, f, g) {
+function Oa(a, b, c, e, d, f, g) {
   if (b.length) {
     const k = this;
     return Promise.all(b).then(function(h) {
@@ -1081,17 +1088,17 @@ function Ma(a, b, c, e, d, f, g) {
       for (let l = 0, m; l < h.length; l++) {
         (m = h[l]).length && (a[l] = m);
       }
-      return Ma.call(k, a, [], c, e, d, f, g);
+      return Oa.call(k, a, [], c, e, d, f, g);
     });
   }
   if (a.length && this.result.length) {
-    this.result = Na.call(this, a, c, e, f);
+    this.result = Pa.call(this, a, c, e, f);
   } else if (f) {
     return this.resolve(c, e, d);
   }
   return f ? d ? W.call(this.index, this.result) : this.result : this;
 }
-function Na(a, b, c, e) {
+function Pa(a, b, c, e) {
   const d = [];
   a = new Set(a.flat().flat());
   for (let f = 0, g, k = 0; f < this.result.length; f++) {
@@ -1166,7 +1173,7 @@ X.prototype.boost = function(a) {
 X.prototype.resolve = function(a, b, c) {
   const e = this.result, d = this.index;
   this.result = this.index = null;
-  return e.length ? ("object" === typeof a && (c = a.enrich, b = a.offset, a = a.limit), Ga.call(d, e, a || 100, b, c)) : e;
+  return e.length ? ("object" === typeof a && (c = a.enrich, b = a.offset, a = a.limit), Ia.call(d, e, a || 100, b, c)) : e;
 };
 B();
 V.prototype.search = function(a, b, c, e) {
@@ -1245,7 +1252,7 @@ V.prototype.search = function(a, b, c, e) {
               }
               q.push(r = r.db.tag(v[p + 1], b, l, u));
             } else {
-              r = Oa.call(this, v[p], v[p + 1], b, l, u);
+              r = Qa.call(this, v[p], v[p + 1], b, l, u);
             }
             d.push({field:v[p], tag:v[p + 1], result:r});
           }
@@ -1297,7 +1304,7 @@ V.prototype.search = function(a, b, c, e) {
           }
         }
       } else {
-        for (let G = 0, K, pb; G < p.length; G += 2) {
+        for (let G = 0, K, rb; G < p.length; G += 2) {
           K = this.tag.get(p[G]);
           if (!K) {
             if (console.warn("Tag '" + p[G] + ":" + p[G + 1] + "' will be skipped because there is no field '" + p[G] + "'."), q) {
@@ -1306,7 +1313,7 @@ V.prototype.search = function(a, b, c, e) {
               return r ? d : new X(d);
             }
           }
-          if (pb = (K = K && K.get(p[G + 1])) && K.length) {
+          if (rb = (K = K && K.get(p[G + 1])) && K.length) {
             y++, x.push(K);
           } else if (!q) {
             return r ? d : new X(d);
@@ -1314,7 +1321,7 @@ V.prototype.search = function(a, b, c, e) {
         }
       }
       if (y) {
-        w = Fa(w, x, r);
+        w = Ha(w, x, r);
         H = w.length;
         if (!H && !q) {
           return r ? w : new X(w);
@@ -1368,12 +1375,12 @@ V.prototype.search = function(a, b, c, e) {
       for (let D = 0; D < w.length; D++) {
         d[D].result = w[D];
       }
-      return k ? Pa(d, b) : n ? Qa(d, a, z.index, z.field, z.D, n) : d;
+      return k ? Ra(d, b) : n ? Sa(d, a, z.index, z.field, z.D, n) : d;
     });
   }
-  return k ? Pa(d, b) : n ? Qa(d, a, this.index, this.field, this.D, n) : d;
+  return k ? Ra(d, b) : n ? Sa(d, a, this.index, this.field, this.D, n) : d;
 };
-function Qa(a, b, c, e, d, f) {
+function Sa(a, b, c, e, d, f) {
   let g, k, h;
   for (let m = 0, n, p, q, r, u; m < a.length; m++) {
     n = a[m].result;
@@ -1415,7 +1422,7 @@ function Qa(a, b, c, e, d, f) {
   }
   return a;
 }
-function Pa(a, b) {
+function Ra(a, b) {
   const c = [], e = B();
   for (let d = 0, f, g; d < a.length; d++) {
     f = a[d];
@@ -1434,7 +1441,7 @@ function Pa(a, b) {
   }
   return c;
 }
-function Oa(a, b, c, e, d) {
+function Qa(a, b, c, e, d) {
   let f = this.tag.get(a);
   if (!f) {
     return console.warn("Tag '" + a + "' was not found"), [];
@@ -1466,7 +1473,7 @@ function W(a) {
   this.D = [];
   this.field = [];
   this.J = [];
-  this.key = (c = b.key || b.id) && Ra(c, this.J) || "id";
+  this.key = (c = b.key || b.id) && Ta(c, this.J) || "id";
   (e = a.keystore || 0) && (this.keystore = e);
   this.reg = (this.fastupdate = !!a.fastupdate) ? e ? new T(e) : new Map() : e ? new U(e) : new Set();
   this.C = (c = b.store || null) && c && !0 !== c && [];
@@ -1474,7 +1481,7 @@ function W(a) {
   this.cache = (c = a.cache || null) && new Y(c);
   a.cache = !1;
   this.worker = a.worker;
-  this.index = Sa.call(this, a, b);
+  this.index = Ua.call(this, a, b);
   this.tag = null;
   if (c = b.tag) {
     if ("string" === typeof c && (c = [c]), c.length) {
@@ -1487,7 +1494,7 @@ function W(a) {
         if (!g) {
           throw Error("The tag field from the document descriptor is undefined.");
         }
-        f.custom ? this.F[d] = f.custom : (this.F[d] = Ra(g, this.J), f.filter && ("string" === typeof this.F[d] && (this.F[d] = new String(this.F[d])), this.F[d].I = f.filter));
+        f.custom ? this.F[d] = f.custom : (this.F[d] = Ta(g, this.J), f.filter && ("string" === typeof this.F[d] && (this.F[d] = new String(this.F[d])), this.F[d].I = f.filter));
         this.R[d] = g;
         this.tag.set(g, new Map());
       }
@@ -1520,7 +1527,7 @@ t.mount = function(a) {
     for (let d = 0, f; d < this.R.length; d++) {
       f = this.R[d];
       var c = void 0;
-      this.index.set(f, c = new M({}, this.reg));
+      this.index.set(f, c = new O({}, this.reg));
       b === this.field && (b = b.slice(0));
       b.push(f);
       c.tag = this.tag.get(f);
@@ -1555,7 +1562,7 @@ t.destroy = function() {
   }
   return Promise.all(a);
 };
-function Sa(a, b) {
+function Ua(a, b) {
   const c = new Map();
   let e = b.index || b.field || b;
   E(e) && (e = [e]);
@@ -1564,23 +1571,23 @@ function Sa(a, b) {
     E(f) || (g = f, f = f.field);
     g = I(g) ? Object.assign({}, a, g) : a;
     if (this.worker) {
-      const k = new N(g);
+      const k = new Q(g);
       c.set(f, k);
     }
-    this.worker || c.set(f, new M(g, this.reg));
-    g.custom ? this.D[d] = g.custom : (this.D[d] = Ra(f, this.J), g.filter && ("string" === typeof this.D[d] && (this.D[d] = new String(this.D[d])), this.D[d].I = g.filter));
+    this.worker || c.set(f, new O(g, this.reg));
+    g.custom ? this.D[d] = g.custom : (this.D[d] = Ta(f, this.J), g.filter && ("string" === typeof this.D[d] && (this.D[d] = new String(this.D[d])), this.D[d].I = g.filter));
     this.field[d] = f;
   }
   if (this.C) {
     a = b.store;
     E(a) && (a = [a]);
     for (let d = 0, f, g; d < a.length; d++) {
-      f = a[d], g = f.field || f, f.custom ? (this.C[d] = f.custom, f.custom.V = g) : (this.C[d] = Ra(g, this.J), f.filter && ("string" === typeof this.C[d] && (this.C[d] = new String(this.C[d])), this.C[d].I = f.filter));
+      f = a[d], g = f.field || f, f.custom ? (this.C[d] = f.custom, f.custom.V = g) : (this.C[d] = Ta(g, this.J), f.filter && ("string" === typeof this.C[d] && (this.C[d] = new String(this.C[d])), this.C[d].I = f.filter));
     }
   }
   return c;
 }
-function Ra(a, b) {
+function Ta(a, b) {
   const c = a.split(":");
   let e = 0;
   for (let d = 0; d < c.length; d++) {
@@ -1646,7 +1653,7 @@ t.set = function(a, b) {
   this.store.set(a, b);
   return this;
 };
-t.searchCache = Ta;
+t.searchCache = Va;
 t.export = function(a, b, c = 0, e = 0) {
   if (c < this.field.length) {
     const g = this.field[c];
@@ -1662,17 +1669,17 @@ t.export = function(a, b, c = 0, e = 0) {
   switch(e) {
     case 0:
       d = "reg";
-      f = va(this.reg);
+      f = xa(this.reg);
       b = null;
       break;
     case 1:
       d = "tag";
-      f = ta(this.tag, this.reg.size);
+      f = va(this.tag, this.reg.size);
       b = null;
       break;
     case 2:
       d = "doc";
-      f = ra(this.store);
+      f = ta(this.store);
       b = null;
       break;
     case 3:
@@ -1682,7 +1689,7 @@ t.export = function(a, b, c = 0, e = 0) {
     default:
       return;
   }
-  return xa.call(this, a, b, d, f, c, e);
+  return za.call(this, a, b, d, f, c, e);
 };
 t.import = function(a, b) {
   if (b) {
@@ -1697,21 +1704,21 @@ t.import = function(a, b) {
     switch(a) {
       case "reg":
         this.fastupdate = !1;
-        this.reg = wa(b, this.reg);
+        this.reg = ya(b, this.reg);
         for (let e = 0, d; e < this.field.length; e++) {
           d = this.index.get(this.field[e]), d.fastupdate = !1, d.reg = this.reg;
         }
         break;
       case "tag":
-        this.tag = ua(b, this.tag);
+        this.tag = wa(b, this.tag);
         break;
       case "doc":
-        this.store = sa(b, this.store);
+        this.store = ua(b, this.store);
     }
   }
 };
-na(V.prototype);
-function Ta(a, b, c) {
+la(V.prototype);
+function Va(a, b, c) {
   a = ("object" === typeof a ? "" + a.query : a).toLowerCase();
   this.cache || (this.cache = new Y());
   let e = this.cache.get(a);
@@ -1752,32 +1759,32 @@ Y.prototype.clear = function() {
   this.cache.clear();
   this.h = "";
 };
-const Ua = {normalize:function(a) {
+const Wa = {normalize:function(a) {
   return a.toLowerCase();
 }};
-const Va = new Map([["b", "p"], ["v", "f"], ["w", "f"], ["z", "s"], ["x", "s"], ["d", "t"], ["n", "m"], ["c", "k"], ["g", "k"], ["j", "k"], ["q", "k"], ["i", "e"], ["y", "e"], ["u", "o"]]);
-const Wa = new Map([["ae", "a"], ["oe", "o"], ["sh", "s"], ["kh", "k"], ["th", "t"], ["pf", "f"]]), Xa = [/([^aeo])h(.)/g, "$1$2", /([aeo])h([^aeo]|$)/g, "$1$2", /([^0-9])\1+/g, "$1"];
-const Ya = {a:"", e:"", i:"", o:"", u:"", y:"", b:1, f:1, p:1, v:1, c:2, g:2, j:2, k:2, q:2, s:2, x:2, z:2, "\u00df":2, d:3, t:3, l:4, m:5, n:5, r:6};
-const Za = /[\x00-\x7F]+/g;
-const $a = /[\x00-\x7F]+/g;
+const Xa = new Map([["b", "p"], ["v", "f"], ["w", "f"], ["z", "s"], ["x", "s"], ["d", "t"], ["n", "m"], ["c", "k"], ["g", "k"], ["j", "k"], ["q", "k"], ["i", "e"], ["y", "e"], ["u", "o"]]);
+const Ya = new Map([["ae", "a"], ["oe", "o"], ["sh", "s"], ["kh", "k"], ["th", "t"], ["pf", "f"]]), Za = [/([^aeo])h(.)/g, "$1$2", /([aeo])h([^aeo]|$)/g, "$1$2", /([^0-9])\1+/g, "$1"];
+const $a = {a:"", e:"", i:"", o:"", u:"", y:"", b:1, f:1, p:1, v:1, c:2, g:2, j:2, k:2, q:2, s:2, x:2, z:2, "\u00df":2, d:3, t:3, l:4, m:5, n:5, r:6};
 const ab = /[\x00-\x7F]+/g;
-var bb = {LatinExact:{normalize:!1, dedupe:!1}, LatinDefault:Ua, LatinSimple:{normalize:!0, dedupe:!0}, LatinBalance:{normalize:!0, dedupe:!0, mapper:Va}, LatinAdvanced:{normalize:!0, dedupe:!0, mapper:Va, matcher:Wa, replacer:Xa}, LatinExtra:{normalize:!0, dedupe:!0, mapper:Va, replacer:Xa.concat([/(?!^)[aeo]/g, ""]), matcher:Wa}, LatinSoundex:{normalize:!0, dedupe:!1, include:{letter:!0}, finalize:function(a) {
+const bb = /[\x00-\x7F]+/g;
+const cb = /[\x00-\x7F]+/g;
+var db = {LatinExact:{normalize:!1, dedupe:!1}, LatinDefault:Wa, LatinSimple:{normalize:!0, dedupe:!0}, LatinBalance:{normalize:!0, dedupe:!0, mapper:Xa}, LatinAdvanced:{normalize:!0, dedupe:!0, mapper:Xa, matcher:Ya, replacer:Za}, LatinExtra:{normalize:!0, dedupe:!0, mapper:Xa, replacer:Za.concat([/(?!^)[aeo]/g, ""]), matcher:Ya}, LatinSoundex:{normalize:!0, dedupe:!1, include:{letter:!0}, finalize:function(a) {
   for (let c = 0; c < a.length; c++) {
     var b = a[c];
-    let e = b.charAt(0), d = Ya[e];
-    for (let f = 1, g; f < b.length && (g = b.charAt(f), "h" === g || "w" === g || !(g = Ya[g]) || g === d || (e += g, d = g, 4 !== e.length)); f++) {
+    let e = b.charAt(0), d = $a[e];
+    for (let f = 1, g; f < b.length && (g = b.charAt(f), "h" === g || "w" === g || !(g = $a[g]) || g === d || (e += g, d = g, 4 !== e.length)); f++) {
     }
     a[c] = e;
   }
 }}, ArabicDefault:{rtl:!0, normalize:!1, dedupe:!0, prepare:function(a) {
-  return ("" + a).replace(Za, " ");
-}}, CjkDefault:{normalize:!1, dedupe:!0, split:"", prepare:function(a) {
-  return ("" + a).replace($a, "");
-}}, CyrillicDefault:{normalize:!1, dedupe:!0, prepare:function(a) {
   return ("" + a).replace(ab, " ");
+}}, CjkDefault:{normalize:!1, dedupe:!0, split:"", prepare:function(a) {
+  return ("" + a).replace(bb, "");
+}}, CyrillicDefault:{normalize:!1, dedupe:!0, prepare:function(a) {
+  return ("" + a).replace(cb, " ");
 }}};
-const cb = {memory:{resolution:1}, performance:{resolution:6, fastupdate:!0, context:{depth:1, resolution:3}}, match:{tokenize:"forward"}, score:{resolution:9, context:{depth:2, resolution:9}}};
-M.prototype.add = function(a, b, c, e) {
+const eb = {memory:{resolution:1}, performance:{resolution:6, fastupdate:!0, context:{depth:1, resolution:3}}, match:{tokenize:"forward"}, score:{resolution:9, context:{depth:2, resolution:9}}};
+O.prototype.add = function(a, b, c, e) {
   if (b && (a || 0 === a)) {
     if (!e && !c && this.reg.has(a)) {
       return this.update(a, b);
@@ -1789,15 +1796,15 @@ M.prototype.add = function(a, b, c, e) {
         let r = b[this.rtl ? e - 1 - q : q];
         var d = r.length;
         if (d && (n || !m[r])) {
-          var f = this.score ? this.score(b, r, q, null, 0) : db(p, e, q), g = "";
+          var f = this.score ? this.score(b, r, q, null, 0) : fb(p, e, q), g = "";
           switch(this.tokenize) {
             case "full":
               if (2 < d) {
                 for (f = 0; f < d; f++) {
                   for (var k = d; k > f; k--) {
                     g = r.substring(f, k);
-                    var h = this.score ? this.score(b, r, q, g, f) : db(p, e, q, d, f);
-                    eb(this, m, g, h, a, c);
+                    var h = this.score ? this.score(b, r, q, g, f) : fb(p, e, q, d, f);
+                    gb(this, m, g, h, a, c);
                   }
                 }
                 break;
@@ -1805,24 +1812,24 @@ M.prototype.add = function(a, b, c, e) {
             case "reverse":
               if (1 < d) {
                 for (k = d - 1; 0 < k; k--) {
-                  g = r[k] + g, h = this.score ? this.score(b, r, q, g, k) : db(p, e, q, d, k), eb(this, m, g, h, a, c);
+                  g = r[k] + g, h = this.score ? this.score(b, r, q, g, k) : fb(p, e, q, d, k), gb(this, m, g, h, a, c);
                 }
                 g = "";
               }
             case "forward":
               if (1 < d) {
                 for (k = 0; k < d; k++) {
-                  g += r[k], eb(this, m, g, f, a, c);
+                  g += r[k], gb(this, m, g, f, a, c);
                 }
                 break;
               }
             default:
-              if (eb(this, m, r, f, a, c), n && 1 < e && q < e - 1) {
+              if (gb(this, m, r, f, a, c), n && 1 < e && q < e - 1) {
                 for (d = B(), g = this.U, f = r, k = Math.min(n + 1, e - q), d[f] = 1, h = 1; h < k; h++) {
                   if ((r = b[this.rtl ? e - 1 - q - h : q + h]) && !d[r]) {
                     d[r] = 1;
-                    const u = this.score ? this.score(b, f, q, r, h) : db(g + (e / 2 > g ? 0 : 1), e, q, k - 1, h - 1), v = this.bidirectional && r > f;
-                    eb(this, l, v ? f : r, u, a, c, v ? r : f);
+                    const u = this.score ? this.score(b, f, q, r, h) : fb(g + (e / 2 > g ? 0 : 1), e, q, k - 1, h - 1), v = this.bidirectional && r > f;
+                    gb(this, l, v ? f : r, u, a, c, v ? r : f);
                   }
                 }
               }
@@ -1834,10 +1841,10 @@ M.prototype.add = function(a, b, c, e) {
       b = "";
     }
   }
-  this.db && (b || this.commit_task.push({del:a}), this.T && fb(this));
+  this.db && (b || this.commit_task.push({del:a}), this.T && hb(this));
   return this;
 };
-function eb(a, b, c, e, d, f, g) {
+function gb(a, b, c, e, d, f, g) {
   let k = g ? a.ctx : a.map, h;
   if (!b[c] || g && !(h = b[c])[g]) {
     if (g ? (b = h || (b[c] = B()), b[g] = 1, (h = k.get(g)) ? k = h : k.set(g, k = new Map())) : b[c] = 1, (h = k.get(c)) ? k = h : k.set(c, k = h = []), k = k[e] || (k[e] = []), !f || !k.includes(d)) {
@@ -1855,10 +1862,10 @@ function eb(a, b, c, e, d, f, g) {
     }
   }
 }
-function db(a, b, c, e, d) {
+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) {
+;O.prototype.search = function(a, b, c) {
   c || (!b && I(a) ? (c = a, a = "") : I(b) && (c = b, b = 0));
   let e = [], d, f, g, k = 0, h, l, m, n, p;
   c ? (a = c.query || a, b = c.limit || b, k = c.offset || 0, f = c.context, g = c.suggest, p = (h = !1 !== c.resolve) && c.enrich, m = c.boost, n = c.resolution, l = this.db && c.tag) : h = this.resolve;
@@ -1866,11 +1873,11 @@ function db(a, b, c, e, d) {
   d = q.length;
   b = b || (h ? 100 : 0);
   if (1 === d) {
-    return gb.call(this, q[0], "", b, k, h, p, l);
+    return ib.call(this, q[0], "", b, k, h, p, l);
   }
   f = this.depth && !1 !== f;
   if (2 === d && f && !g) {
-    return gb.call(this, q[0], q[1], b, k, h, p, l);
+    return ib.call(this, q[0], q[1], b, k, h, p, l);
   }
   let r = B(), u = 0, v;
   1 < d && f && (v = q[0], u = 1);
@@ -1884,8 +1891,8 @@ function db(a, b, c, e, d) {
       for (let y, F; u < d; u++) {
         if ((F = q[u]) && !r[F]) {
           r[F] = 1;
-          y = await hb(x, F, v, 0, 0, !1, !1);
-          if (y = ib(y, e, g, n)) {
+          y = await jb(x, F, v, 0, 0, !1, !1);
+          if (y = kb(y, e, g, n)) {
             e = y;
             break;
           }
@@ -1893,14 +1900,14 @@ function db(a, b, c, e, d) {
         }
         g && v && u === d - 1 && !e.length && (v = "", u = -1, r = B());
       }
-      return jb(e, n, b, k, g, m, h);
+      return lb(e, n, b, k, g, m, h);
     }();
   }
   for (let x, y; u < d; u++) {
     if ((y = q[u]) && !r[y]) {
       r[y] = 1;
-      x = hb(this, y, v, 0, 0, !1, !1);
-      if (x = ib(x, e, g, n)) {
+      x = jb(this, y, v, 0, 0, !1, !1);
+      if (x = kb(x, e, g, n)) {
         e = x;
         break;
       }
@@ -1908,24 +1915,24 @@ function db(a, b, c, e, d) {
     }
     g && v && u === d - 1 && !e.length && (v = "", u = -1, r = B());
   }
-  return jb(e, n, b, k, g, m, h);
+  return lb(e, n, b, k, g, m, h);
 };
-function jb(a, b, c, e, d, f, g) {
+function lb(a, b, c, e, d, f, g) {
   let k = a.length, h = a;
   if (1 < k) {
-    h = Da(a, b, c, e, d, f, g);
+    h = Fa(a, b, c, e, d, f, g);
   } else if (1 === k) {
-    return g ? Ga.call(null, a[0], c, e) : new X(a[0]);
+    return g ? Ia.call(null, a[0], c, e) : new X(a[0]);
   }
   return g ? h : new X(h);
 }
-function gb(a, b, c, e, d, f, g) {
-  a = hb(this, a, b, c, e, d, f, g);
+function ib(a, b, c, e, d, f, g) {
+  a = jb(this, a, b, c, e, d, f, g);
   return this.db ? a.then(function(k) {
     return d ? k || [] : new X(k);
-  }) : a && a.length ? d ? Ga.call(this, a, c, e) : new X(a) : d ? [] : new X();
+  }) : a && a.length ? d ? Ia.call(this, a, c, e) : new X(a) : d ? [] : new X();
 }
-function ib(a, b, c, e) {
+function kb(a, b, c, e) {
   let d = [];
   if (a && a.length) {
     if (a.length <= e) {
@@ -1946,7 +1953,7 @@ function ib(a, b, c, e) {
     return d;
   }
 }
-function hb(a, b, c, e, d, f, g, k) {
+function jb(a, b, c, e, d, f, g, k) {
   let h;
   c && (h = a.bidirectional && b > c) && (h = c, c = b, b = h);
   if (a.db) {
@@ -1955,7 +1962,7 @@ function hb(a, b, c, e, d, f, g, k) {
   a = c ? (a = a.ctx.get(c)) && a.get(b) : a.map.get(b);
   return a;
 }
-;M.prototype.remove = function(a, b) {
+;O.prototype.remove = function(a, b) {
   const c = this.reg.size && (this.fastupdate ? this.reg.get(a) : this.reg.has(a));
   if (c) {
     if (this.fastupdate) {
@@ -1970,15 +1977,15 @@ function hb(a, b, c, e, d, f, g, k) {
         }
       }
     } else {
-      kb(this.map, a), this.depth && kb(this.ctx, a);
+      mb(this.map, a), this.depth && mb(this.ctx, a);
     }
     b || this.reg.delete(a);
   }
-  this.db && (this.commit_task.push({del:a}), this.T && fb(this));
+  this.db && (this.commit_task.push({del:a}), this.T && hb(this));
   this.cache && this.cache.remove(a);
   return this;
 };
-function kb(a, b) {
+function mb(a, b) {
   let c = 0;
   if (a.constructor === Array) {
     for (let e = 0, d, f; e < a.length; e++) {
@@ -1993,24 +2000,24 @@ function kb(a, b) {
     }
   } else {
     for (let e of a.entries()) {
-      const d = e[0], f = kb(e[1], b);
+      const d = e[0], f = mb(e[1], b);
       f ? c += f : a.delete(d);
     }
   }
   return c;
 }
-;function M(a, b) {
-  if (!this || this.constructor !== M) {
-    return new M(a);
+;function O(a, b) {
+  if (!this || this.constructor !== O) {
+    return new O(a);
   }
   if (a) {
     var c = E(a) ? a : a.preset;
-    c && (cb[c] || console.warn("Preset not found: " + c), a = Object.assign({}, cb[c], a));
+    c && (eb[c] || console.warn("Preset not found: " + c), a = Object.assign({}, eb[c], a));
   } else {
     a = {};
   }
   c = a.context;
-  const e = !0 === c ? {depth:1} : c || {}, d = E(a.encoder) ? bb[a.encoder] : a.encode || a.encoder || Ua;
+  const e = !0 === c ? {depth:1} : c || {}, d = E(a.encoder) ? db[a.encoder] : a.encode || a.encoder || Wa;
   this.encoder = d.encode ? d : "object" === typeof d ? new J(d) : {encode:d};
   this.resolution = a.resolution || 9;
   this.tokenize = c = a.tokenize || "strict";
@@ -2034,7 +2041,7 @@ function kb(a, b) {
   this.commit_timer = null;
   this.priority = a.priority || 4;
 }
-t = M.prototype;
+t = O.prototype;
 t.mount = function(a) {
   this.commit_timer && (clearTimeout(this.commit_timer), this.commit_timer = null);
   return a.mount(this);
@@ -2047,7 +2054,7 @@ t.destroy = function() {
   this.commit_timer && (clearTimeout(this.commit_timer), this.commit_timer = null);
   return this.db.destroy();
 };
-function fb(a) {
+function hb(a) {
   a.commit_timer || (a.commit_timer = setTimeout(function() {
     a.commit_timer = null;
     a.db.commit(a, void 0, void 0);
@@ -2071,7 +2078,7 @@ 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);
 };
-function lb(a) {
+function nb(a) {
   let b = 0;
   if (a.constructor === Array) {
     for (let c = 0, e; c < a.length; c++) {
@@ -2079,7 +2086,7 @@ function lb(a) {
     }
   } else {
     for (const c of a) {
-      const e = c[0], d = lb(c[1]);
+      const e = c[0], d = nb(c[1]);
       d ? b += d : a.delete(e);
     }
   }
@@ -2089,17 +2096,17 @@ t.cleanup = function() {
   if (!this.fastupdate) {
     return console.info('Cleanup the index isn\'t required when not using "fastupdate".'), this;
   }
-  lb(this.map);
-  this.depth && lb(this.ctx);
+  nb(this.map);
+  this.depth && nb(this.ctx);
   return this;
 };
-t.searchCache = Ta;
+t.searchCache = Va;
 t.export = function(a, b, c = 0, e = 0) {
   let d, f;
   switch(e) {
     case 0:
       d = "reg";
-      f = va(this.reg);
+      f = xa(this.reg);
       break;
     case 1:
       d = "cfg";
@@ -2107,29 +2114,29 @@ t.export = function(a, b, c = 0, e = 0) {
       break;
     case 2:
       d = "map";
-      f = ra(this.map, this.reg.size);
+      f = ta(this.map, this.reg.size);
       break;
     case 3:
       d = "ctx";
-      f = ta(this.ctx, this.reg.size);
+      f = va(this.ctx, this.reg.size);
       break;
     default:
       return;
   }
-  return xa.call(this, a, b, d, f, c, e);
+  return za.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(), a = 1 < a.length ? a[1] : a[0], a) {
       case "reg":
         this.fastupdate = !1;
-        this.reg = wa(b, this.reg);
+        this.reg = ya(b, this.reg);
         break;
       case "map":
-        this.map = sa(b, this.map);
+        this.map = ua(b, this.map);
         break;
       case "ctx":
-        this.ctx = ua(b, this.ctx);
+        this.ctx = wa(b, this.ctx);
     }
   }
 };
@@ -2183,11 +2190,11 @@ t.serialize = function(a = !0) {
   d = "index.ctx=new Map([" + d + "]);";
   return a ? "function inject(index){" + b + e + d + "}" : b + e + d;
 };
-na(M.prototype);
-const mb = "undefined" !== typeof window && (window.indexedDB || window.mozIndexedDB || window.webkitIndexedDB || window.msIndexedDB), nb = ["map", "ctx", "tag", "reg", "cfg"];
-function ob(a, b = {}) {
+la(O.prototype);
+const ob = "undefined" !== typeof window && (window.indexedDB || window.mozIndexedDB || window.webkitIndexedDB || window.msIndexedDB), pb = ["map", "ctx", "tag", "reg", "cfg"];
+function qb(a, b = {}) {
   if (!this) {
-    return new ob(a, b);
+    return new qb(a, b);
   }
   "object" === typeof a && (b = a, a = a.name);
   a || console.info("Default storage space was used, because a name was not passed.");
@@ -2198,7 +2205,7 @@ function ob(a, b = {}) {
   this.db = null;
   this.h = {};
 }
-t = ob.prototype;
+t = qb.prototype;
 t.mount = function(a) {
   if (!a.encoder) {
     return a.mount(this);
@@ -2210,10 +2217,10 @@ t.open = function() {
   let a = this;
   navigator.storage && navigator.storage.persist();
   return this.db || new Promise(function(b, c) {
-    const e = mb.open(a.id + (a.field ? ":" + a.field : ""), 1);
+    const e = ob.open(a.id + (a.field ? ":" + a.field : ""), 1);
     e.onupgradeneeded = function() {
       const d = a.db = this.result;
-      nb.forEach(f => {
+      pb.forEach(f => {
         d.objectStoreNames.contains(f) || d.createObjectStore(f);
       });
     };
@@ -2239,13 +2246,13 @@ t.close = function() {
   this.db = null;
 };
 t.destroy = function() {
-  const a = mb.deleteDatabase(this.id + (this.field ? ":" + this.field : ""));
+  const a = ob.deleteDatabase(this.id + (this.field ? ":" + this.field : ""));
   return Z(a);
 };
 t.clear = function() {
-  const a = this.db.transaction(nb, "readwrite");
-  for (let b = 0; b < nb.length; b++) {
-    a.objectStore(nb[b]).clear();
+  const a = this.db.transaction(pb, "readwrite");
+  for (let b = 0; b < pb.length; b++) {
+    a.objectStore(pb[b]).clear();
   }
   return Z(a);
 };
@@ -2429,7 +2436,7 @@ t.commit = async function(a, b, c) {
     }
   }), a.map.clear(), a.ctx.clear(), a.tag && a.tag.clear(), a.store && a.store.clear(), a.document || a.reg.clear());
 };
-function qb(a, b, c) {
+function sb(a, b, c) {
   const e = a.value;
   let d, f, g = 0;
   for (let k = 0, h; k < e.length; k++) {
@@ -2458,17 +2465,17 @@ t.remove = function(a) {
   return Promise.all([this.transaction("map", "readwrite", function(b) {
     b.openCursor().onsuccess = function() {
       const c = this.result;
-      c && qb(c, a);
+      c && sb(c, a);
     };
   }), this.transaction("ctx", "readwrite", function(b) {
     b.openCursor().onsuccess = function() {
       const c = this.result;
-      c && qb(c, a);
+      c && sb(c, a);
     };
   }), this.transaction("tag", "readwrite", function(b) {
     b.openCursor().onsuccess = function() {
       const c = this.result;
-      c && qb(c, a, !0);
+      c && sb(c, a, !0);
     };
   }), this.transaction("reg", "readwrite", function(b) {
     for (let c = 0; c < a.length; c++) {
@@ -2488,9 +2495,9 @@ function Z(a) {
     a = null;
   });
 }
-;const rb = {Index:M, Charset:bb, Encoder:J, Document:V, Worker:N, Resolver:X, IndexedDB:ob, Language:{}}, sb = self;
-let tb;
-(tb = sb.define) && tb.amd ? tb([], function() {
-  return rb;
-}) : "object" === typeof sb.exports ? sb.exports = rb : sb.FlexSearch = rb;
+;const tb = {Index:O, Charset:db, Encoder:J, Document:V, Worker:Q, Resolver:X, IndexedDB:qb, Language:{}}, ub = "undefined" !== typeof self ? self : "undefined" !== typeof global ? global : "undefined" !== typeof window ? window : {};
+let vb;
+(vb = ub.define) && vb.amd ? vb([], function() {
+  return tb;
+}) : "object" === typeof ub.exports ? ub.exports = tb : ub.FlexSearch = tb;
 }(this||self));
diff --git a/dist/flexsearch.bundle.min.js b/dist/flexsearch.bundle.min.js
index c6939f8..a200c4c 100644
--- a/dist/flexsearch.bundle.min.js
+++ b/dist/flexsearch.bundle.min.js
@@ -1,5 +1,5 @@
 /**!
- * FlexSearch.js v0.8.107 (Bundle)
+ * FlexSearch.js v0.8.108 (Bundle)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
@@ -21,72 +21,72 @@ t.addMatcher=function(a,b){if("object"===typeof a)return this.addReplacer(a,b);i
 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(L,50,this);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(ha,"$1 $2").replace(ia,"$1 $2").replace(fa,"$1 "));const b=!(this.dedupe||this.mapper||this.filter||this.matcher||this.stemmer||this.replacer);let c=
 [],e=this.split||""===this.split?a.split(this.split):a;for(let f=0,g,k;f<e.length;f++)if((g=k=e[f])&&!(g.length<this.minlength))if(b)c.push(g);else if(!this.filter||!this.filter.has(g)){if(this.cache&&g.length<=this.L)if(this.H){var d=this.G.get(g);if(d||""===d){d&&c.push(d);continue}}else this.H=setTimeout(L,50,this);this.stemmer&&2<g.length&&(this.N||(this.N=new RegExp("(?!^)("+this.A+")$")),g=g.replace(this.N,h=>this.stemmer.get(h)),g.length<this.minlength||this.filter&&this.filter.has(g))&&(g=
 "");if(g&&(this.mapper||this.dedupe&&1<g.length)){d="";for(let h=0,l="",m,n;h<g.length;h++)m=g.charAt(h),m===l&&this.dedupe||((n=this.mapper&&this.mapper.get(m))||""===n?n===l&&this.dedupe||!(l=n)||(d+=n):d+=l=m);g=d}this.matcher&&1<g.length&&(this.M||(this.M=new RegExp("("+this.h+")","g")),g=g.replace(this.M,h=>this.matcher.get(h)));if(g&&this.replacer)for(d=0;g&&d<this.replacer.length;d+=2)g=g.replace(this.replacer[d],this.replacer[d+1]);this.cache&&k.length<=this.L&&(this.G.set(k,g),this.G.size>
-this.S&&(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 L(a){a.H=null;a.B.clear();a.G.clear()};async function ka(a){a=a.data;var b=self._index;const c=a.args;var e=a.task;switch(e){case "init":e=a.options||{};(b=a.factory)?(Function("return "+b)()(self),self._index=new self.FlexSearch.Index(e),delete self.FlexSearch):self._index=new M(e);postMessage({id:a.id});break;default:a=a.id,b=b[e].apply(b,c),postMessage("search"===e?{id:a,msg:b}:{id:a})}};let la=0;
-function N(a={}){function b(g){function k(h){h=h.data||h;const l=h.id,m=l&&d.h[l];m&&(m(h.msg),delete d.h[l])}this.worker=g;this.h=B();if(this.worker){e?this.worker.on("message",k):this.worker.onmessage=k;if(a.config)return new Promise(function(h){d.h[++la]=function(){h(d)};d.worker.postMessage({id:la,task:"init",factory:c,options:a})});this.worker.postMessage({task:"init",factory:c,options:a});return this}}if(!this||this.constructor!==N)return new N(a);let c="undefined"!==typeof self?self._factory:"undefined"!==
-typeof window?window._factory:null;c&&(c=c.toString());const e="undefined"===typeof window,d=this,f=ma(c,e,a.worker);return f.then?f.then(function(g){return b.call(d,g)}):b.call(this,f)}O("add");O("append");O("search");O("update");O("remove");
-function O(a){N.prototype[a]=N.prototype[a+"Async"]=async function(){const b=this,c=[].slice.call(arguments);var e=c[c.length-1];let d;"function"===typeof e&&(d=e,c.splice(c.length-1,1));e=new Promise(function(f){b.h[++la]=f;b.worker.postMessage({task:a,id:la,args:c})});return d?(e.then(d),this):e}}
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+function nb(a){let b=0;if(a.constructor===Array)for(let c=0,e;c<a.length;c++)(e=a[c])&&(b+=e.length);else for(const c of a){const e=c[0],d=nb(c[1]);d?b+=d:a.delete(e)}return b}t.cleanup=function(){if(!this.fastupdate)return this;nb(this.map);this.depth&&nb(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=xa(this.reg);break;case 1:d="cfg";f=null;break;case 2:d="map";f=ta(this.map,this.reg.size);break;case 3:d="ctx";f=va(this.ctx,this.reg.size);break;default:return}return za.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(),a=1<a.length?a[1]:a[0],a){case "reg":this.fastupdate=!1;this.reg=ya(b,this.reg);break;case "map":this.map=ua(b,this.map);break;case "ctx":this.ctx=wa(b,this.ctx)}};
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-t.open=function(){let a=this;navigator.storage&&navigator.storage.persist();return this.db||new Promise(function(b,c){const e=mb.open(a.id+(a.field?":"+a.field:""),1);e.onupgradeneeded=function(){const d=a.db=this.result;nb.forEach(f=>{d.objectStoreNames.contains(f)||d.createObjectStore(f)})};e.onblocked=function(d){console.error("blocked",d);c()};e.onerror=function(d){console.error(this.error,d);c()};e.onsuccess=function(){a.db=this.result;a.db.onversionchange=function(){a.close()};b(a)}})};
-t.close=function(){this.db.close();this.db=null};t.destroy=function(){const a=mb.deleteDatabase(this.id+(this.field?":"+this.field:""));return Z(a)};t.clear=function(){const a=this.db.transaction(nb,"readwrite");for(let b=0;b<nb.length;b++)a.objectStore(nb[b]).clear();return Z(a)};
+m[0];g=m[1];for(const n of g.entries()){g=n[0];k=n[1];h="";for(let p=0,q;p<k.length;p++){q=k[p]||[""];l="";for(let r=0;r<q.length;r++)l+=(l?",":"")+("string"===c?'"'+q[r]+'"':q[r]);l="["+l+"]";h+=(h?",":"")+l}h='new Map([["'+g+'",['+h+"]]])";h='["'+f+'",'+h+"]";d+=(d?",":"")+h}}d="index.ctx=new Map(["+d+"]);";return a?"function inject(index){"+b+e+d+"}":b+e+d};la(O.prototype);const ob="undefined"!==typeof window&&(window.indexedDB||window.mozIndexedDB||window.webkitIndexedDB||window.msIndexedDB),pb=["map","ctx","tag","reg","cfg"];
+function rb(a,b={}){if(!this)return new rb(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=rb.prototype;t.mount=function(a){if(!a.encoder)return a.mount(this);a.db=this;return this.open()};
+t.open=function(){let a=this;navigator.storage&&navigator.storage.persist();return this.db||new Promise(function(b,c){const e=ob.open(a.id+(a.field?":"+a.field:""),1);e.onupgradeneeded=function(){const d=a.db=this.result;pb.forEach(f=>{d.objectStoreNames.contains(f)||d.createObjectStore(f)})};e.onblocked=function(d){console.error("blocked",d);c()};e.onerror=function(d){console.error(this.error,d);c()};e.onsuccess=function(){a.db=this.result;a.db.onversionchange=function(){a.close()};b(a)}})};
+t.close=function(){this.db.close();this.db=null};t.destroy=function(){const a=ob.deleteDatabase(this.id+(this.field?":"+this.field:""));return Z(a)};t.clear=function(){const a=this.db.transaction(pb,"readwrite");for(let b=0;b<pb.length;b++)a.objectStore(pb[b]).clear();return Z(a)};
 t.get=function(a,b,c=0,e=0,d=!0,f=!1){a=this.db.transaction(b?"ctx":"map","readonly").objectStore(b?"ctx":"map").get(b?b+":"+a:a);const g=this;return Z(a).then(function(k){let h=[];if(!k||!k.length)return h;if(d){if(!c&&!e&&1===k.length)return k[0];for(let l=0,m;l<k.length;l++)if((m=k[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++)h.push(m[p]);e=0;if(h.length===c)break}return f?g.enrich(h):h}return k})};
 t.tag=function(a,b=0,c=0,e=!1){a=this.db.transaction("tag","readonly").objectStore("tag").get(a);const d=this;return Z(a).then(function(f){if(!f||!f.length||c>=f.length)return[];if(!b&&!c)return f;f=f.slice(c,c+b);return e?d.enrich(f):f})};
 t.enrich=function(a){"object"!==typeof a&&(a=[a]);const b=this.db.transaction("reg","readonly").objectStore("reg"),c=[];for(let e=0;e<a.length;e++)c[e]=Z(b.get(a[e]));return Promise.all(c).then(function(e){for(let d=0;d<e.length;d++)e[d]={id:a[d],doc:e[d]?JSON.parse(e[d]):null};return e})};t.has=function(a){a=this.db.transaction("reg","readonly").objectStore("reg").getKey(a);return Z(a)};t.search=null;t.info=function(){};
@@ -95,6 +95,6 @@ t.commit=async function(a,b,c){if(b)await this.clear(),a.commit_task=[];else{let
 for(let m=0,n,p;m<l;m++)if((p=g[m])&&p.length){if((n=k[m])&&n.length)for(h=0;h<p.length;h++)n.push(p[h]);else k[m]=p;h=1}}else k=g,h=1;h&&e.put(k,f)})}}),await this.transaction("ctx","readwrite",function(e){for(const d of a.ctx){const f=d[0],g=d[1];for(const k of g){const h=k[0],l=k[1];l.length&&(b?e.put(l,f+":"+h):e.get(f+":"+h).onsuccess=function(){let m=this.result;var n;if(m&&m.length){const p=Math.max(m.length,l.length);for(let q=0,r,u;q<p;q++)if((u=l[q])&&u.length){if((r=m[q])&&r.length)for(n=
 0;n<u.length;n++)r.push(u[n]);else m[q]=u;n=1}}else m=l,n=1;n&&e.put(m,f+":"+h)})}}}),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 k=this.result;
 k=k&&k.length?k.concat(g):g;e.put(k,f)})}}),a.map.clear(),a.ctx.clear(),a.tag&&a.tag.clear(),a.store&&a.store.clear(),a.document||a.reg.clear())};
-function qb(a,b,c){const e=a.value;let d,f,g=0;for(let k=0,h;k<e.length;k++){if(h=c?e:e[k]){for(let l=0,m,n;l<b.length;l++)if(n=b[l],m=h.indexOf(f?parseInt(n,10):n),0>m&&!f&&"string"===typeof n&&!isNaN(n)&&(m=h.indexOf(parseInt(n,10)))&&(f=1),0<=m)if(d=1,1<h.length)h.splice(m,1);else{e[k]=[];break}g+=h.length}if(c)break}g?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&&qb(c,a)}}),this.transaction("ctx","readwrite",function(b){b.openCursor().onsuccess=function(){const c=this.result;c&&qb(c,a)}}),this.transaction("tag","readwrite",function(b){b.openCursor().onsuccess=function(){const c=this.result;c&&qb(c,a,!0)}}),this.transaction("reg","readwrite",function(b){for(let c=0;c<a.length;c++)b.delete(a[c])})])};
-function Z(a){return new Promise((b,c)=>{a.onsuccess=function(){b(this.result)};a.oncomplete=function(){b(this.result)};a.onerror=c;a=null})};const rb={Index:M,Charset:bb,Encoder:J,Document:V,Worker:N,Resolver:X,IndexedDB:pb,Language:{}},sb=self;let tb;(tb=sb.define)&&tb.amd?tb([],function(){return rb}):"object"===typeof sb.exports?sb.exports=rb:sb.FlexSearch=rb;}(this||self));
+function sb(a,b,c){const e=a.value;let d,f,g=0;for(let k=0,h;k<e.length;k++){if(h=c?e:e[k]){for(let l=0,m,n;l<b.length;l++)if(n=b[l],m=h.indexOf(f?parseInt(n,10):n),0>m&&!f&&"string"===typeof n&&!isNaN(n)&&(m=h.indexOf(parseInt(n,10)))&&(f=1),0<=m)if(d=1,1<h.length)h.splice(m,1);else{e[k]=[];break}g+=h.length}if(c)break}g?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&&sb(c,a)}}),this.transaction("ctx","readwrite",function(b){b.openCursor().onsuccess=function(){const c=this.result;c&&sb(c,a)}}),this.transaction("tag","readwrite",function(b){b.openCursor().onsuccess=function(){const c=this.result;c&&sb(c,a,!0)}}),this.transaction("reg","readwrite",function(b){for(let c=0;c<a.length;c++)b.delete(a[c])})])};
+function Z(a){return new Promise((b,c)=>{a.onsuccess=function(){b(this.result)};a.oncomplete=function(){b(this.result)};a.onerror=c;a=null})};const tb={Index:O,Charset:db,Encoder:J,Document:V,Worker:Q,Resolver:X,IndexedDB:rb,Language:{}},ub="undefined"!==typeof self?self:"undefined"!==typeof global?global:"undefined"!==typeof window?window:{};let vb;(vb=ub.define)&&vb.amd?vb([],function(){return tb}):"object"===typeof ub.exports?ub.exports=tb:ub.FlexSearch=tb;}(this||self));
diff --git a/dist/flexsearch.bundle.module.debug.js b/dist/flexsearch.bundle.module.debug.js
index 31699d5..243ed61 100644
--- a/dist/flexsearch.bundle.module.debug.js
+++ b/dist/flexsearch.bundle.module.debug.js
@@ -1,5 +1,5 @@
 /**!
- * FlexSearch.js v0.8.107 (Bundle/Module/Debug)
+ * FlexSearch.js v0.8.108 (Bundle/Module/Debug)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
@@ -268,89 +268,36 @@ function L(a) {
   a.B.clear();
   a.G.clear();
 }
-;async function ka(a) {
+;let M, N;
+async function ka(a) {
   a = a.data;
-  var b = self._index;
-  const c = a.args;
-  var e = a.task;
-  switch(e) {
+  const b = a.task, c = a.id;
+  let e = a.args;
+  switch(b) {
     case "init":
-      e = a.options || {};
-      (b = a.factory) ? (Function("return " + b)()(self), self._index = new self.FlexSearch.Index(e), delete self.FlexSearch) : self._index = new M(e);
-      postMessage({id:a.id});
+      N = a.options || {};
+      (a = a.factory) ? (Function("return " + a)()(self), M = new self.FlexSearch.Index(N), delete self.FlexSearch) : M = new O(N);
+      postMessage({id:c});
       break;
     default:
-      a = a.id, b = b[e].apply(b, c), postMessage("search" === e ? {id:a, msg:b} : {id:a});
+      let d;
+      "export" === b && (e = [N.export]);
+      "import" === b ? await N.import.call(M, M) : d = M[b].apply(M, e);
+      postMessage("search" === b ? {id:c, msg:d} : {id:c});
   }
 }
-;let la = 0;
-function N(a = {}) {
-  function b(g) {
-    function k(h) {
-      h = h.data || h;
-      const l = h.id, m = l && d.h[l];
-      m && (m(h.msg), delete d.h[l]);
-    }
-    this.worker = g;
-    this.h = B();
-    if (this.worker) {
-      e ? this.worker.on("message", k) : this.worker.onmessage = k;
-      if (a.config) {
-        return new Promise(function(h) {
-          d.h[++la] = function() {
-            h(d);
-          };
-          d.worker.postMessage({id:la, task:"init", factory:c, options:a});
-        });
-      }
-      this.worker.postMessage({task:"init", factory:c, options:a});
-      return this;
-    }
-  }
-  if (!this || this.constructor !== N) {
-    return new N(a);
-  }
-  let c = "undefined" !== typeof self ? self._factory : "undefined" !== typeof window ? window._factory : null;
-  c && (c = c.toString());
-  const e = "undefined" === typeof window, d = this, f = ma(c, e, a.worker);
-  return f.then ? f.then(function(g) {
-    return b.call(d, g);
-  }) : b.call(this, f);
-}
-O("add");
-O("append");
-O("search");
-O("update");
-O("remove");
-function O(a) {
-  N.prototype[a] = N.prototype[a + "Async"] = async function() {
-    const b = this, c = [].slice.call(arguments);
-    var e = c[c.length - 1];
-    let d;
-    "function" === typeof e && (d = e, c.splice(c.length - 1, 1));
-    e = new Promise(function(f) {
-      b.h[++la] = f;
-      b.worker.postMessage({task:a, id:la, args:c});
-    });
-    return d ? (e.then(d), this) : e;
-  };
-}
-function ma(a, b, c) {
-  return b ? "undefined" !== typeof module ? new (require("worker_threads")["Worker"])(__dirname + "/node/node.js") : import("worker_threads").then(function(worker){ return new worker["Worker"](import.meta.dirname + "/node/node.mjs"); }) : a ? new window.Worker(URL.createObjectURL(new Blob(["onmessage=" + ka.toString()], {type:"text/javascript"}))) : new window.Worker(E(c) ? c : import.meta.url.replace("/worker.js", "/worker/worker.js").replace("flexsearch.bundle.module.min.js", 
-  "module/worker/worker.js"), {type:"module"});
-}
-;function na(a) {
+;function la(a) {
   P.call(a, "add");
   P.call(a, "append");
   P.call(a, "search");
   P.call(a, "update");
   P.call(a, "remove");
 }
-let Q, oa;
-const pa = {}, R = {};
+let ma, na;
+const oa = {}, pa = {};
 function qa(a) {
-  Q = 0;
-  pa[a] = R[a];
+  ma = 0;
+  oa[a] = pa[a];
 }
 function P(a) {
   this[a + "Async"] = function() {
@@ -358,11 +305,11 @@ function P(a) {
     var c = b[b.length - 1];
     let e;
     "function" === typeof c && (e = c, delete b[b.length - 1]);
-    Q || (Q = setTimeout(qa, 0, a), oa = Date.now());
-    R[a] || (R[a] = pa[a] = 1000);
-    if (!--pa[a]) {
-      pa[a] = R[a] = R[a] * this.priority * this.priority * 3 / (Date.now() - oa) | 0 || 1;
-      Q = clearTimeout(Q);
+    ma || (ma = setTimeout(qa, 0, a), na = Date.now());
+    pa[a] || (pa[a] = oa[a] = 1000);
+    if (!--oa[a]) {
+      oa[a] = pa[a] = pa[a] * this.priority * this.priority * 3 / (Date.now() - na) | 0 || 1;
+      ma = clearTimeout(ma);
       const f = this;
       return new Promise(g => {
         setTimeout(function() {
@@ -376,7 +323,67 @@ function P(a) {
     return c;
   };
 }
-;function ra(a, b = 0) {
+;let ra = 0;
+function Q(a = {}) {
+  function b(g) {
+    function k(h) {
+      h = h.data || h;
+      const l = h.id, m = l && d.h[l];
+      m && (m(h.msg), delete d.h[l]);
+    }
+    this.worker = g;
+    this.h = B();
+    if (this.worker) {
+      e ? this.worker.on("message", k) : this.worker.onmessage = k;
+      if (a.config) {
+        return new Promise(function(h) {
+          d.h[++ra] = function() {
+            h(d);
+          };
+          d.worker.postMessage({id:ra, task:"init", factory:c, options:a});
+        });
+      }
+      this.worker.postMessage({task:"init", factory:c, options:a});
+      return this;
+    }
+  }
+  if (!this || this.constructor !== Q) {
+    return new Q(a);
+  }
+  let c = "undefined" !== typeof self ? self._factory : "undefined" !== typeof window ? window._factory : null;
+  c && (c = c.toString());
+  const e = "undefined" === typeof window, d = this, f = sa(c, e, a.worker);
+  return f.then ? f.then(function(g) {
+    return b.call(d, g);
+  }) : b.call(this, f);
+}
+R("add");
+R("append");
+R("search");
+R("update");
+R("remove");
+R("clear");
+R("export");
+R("import");
+la(Q.prototype);
+function R(a) {
+  Q.prototype[a] = async function() {
+    const b = this, c = [].slice.call(arguments);
+    var e = c[c.length - 1];
+    let d;
+    "function" === typeof e && (d = e, c.splice(c.length - 1, 1));
+    e = new Promise(function(f) {
+      b.h[++ra] = f;
+      b.worker.postMessage({task:a, id:ra, args:c});
+    });
+    return d ? (e.then(d), this) : e;
+  };
+}
+function sa(a, b, c) {
+  return b ? "undefined" !== typeof module ? new (require("worker_threads")["Worker"])(__dirname + "/node/node.js") : import("worker_threads").then(function(worker){ return new worker["Worker"](import.meta.dirname + "/node/node.mjs"); }) : a ? new window.Worker(URL.createObjectURL(new Blob(["onmessage=" + ka.toString()], {type:"text/javascript"}))) : new window.Worker(E(c) ? c : import.meta.url.replace("/worker.js", "/worker/worker.js").replace("flexsearch.bundle.module.min.js", 
+  "module/worker/worker.js"), {type:"module"});
+}
+;function ta(a, b = 0) {
   let c = [], e = [];
   b && (b = 250000 / b * 5000 | 0);
   for (const d of a.entries()) {
@@ -385,30 +392,30 @@ function P(a) {
   e.length && c.push(e);
   return c;
 }
-function sa(a, b) {
+function ua(a, b) {
   b || (b = new Map());
   for (let c = 0, e; c < a.length; c++) {
     e = a[c], b.set(e[0], e[1]);
   }
   return b;
 }
-function ta(a, b = 0) {
+function va(a, b = 0) {
   let c = [], e = [];
   b && (b = 250000 / b * 1000 | 0);
   for (const d of a.entries()) {
-    e.push([d[0], ra(d[1])[0]]), e.length === b && (c.push(e), e = []);
+    e.push([d[0], ta(d[1])[0]]), e.length === b && (c.push(e), e = []);
   }
   e.length && c.push(e);
   return c;
 }
-function ua(a, b) {
+function wa(a, b) {
   b || (b = new Map());
   for (let c = 0, e, d; c < a.length; c++) {
-    e = a[c], d = b.get(e[0]), b.set(e[0], sa(e[1], d));
+    e = a[c], d = b.get(e[0]), b.set(e[0], ua(e[1], d));
   }
   return b;
 }
-function va(a) {
+function xa(a) {
   let b = [], c = [];
   for (const e of a.keys()) {
     c.push(e), 250000 === c.length && (b.push(c), c = []);
@@ -416,14 +423,14 @@ function va(a) {
   c.length && b.push(c);
   return b;
 }
-function wa(a, b) {
+function ya(a, b) {
   b || (b = new Set());
   for (let c = 0; c < a.length; c++) {
     b.add(a[c]);
   }
   return b;
 }
-function xa(a, b, c, e, d, f, g = 0) {
+function za(a, b, c, e, d, f, g = 0) {
   const k = e && e.constructor === Array;
   var h = k ? e.shift() : e;
   if (!h) {
@@ -432,12 +439,12 @@ function xa(a, b, c, e, d, f, g = 0) {
   if ((h = a((b ? b + "." : "") + (g + 1) + "." + c, JSON.stringify(h))) && h.then) {
     const l = this;
     return h.then(function() {
-      return xa.call(l, a, b, c, k ? e : null, d, f, g + 1);
+      return za.call(l, a, b, c, k ? e : null, d, f, g + 1);
     });
   }
-  return xa.call(this, a, b, c, k ? e : null, d, f, g + 1);
+  return za.call(this, a, b, c, k ? e : null, d, f, g + 1);
 }
-;function ya(a, b, c, e) {
+;function Aa(a, b, c, e) {
   let d = [];
   for (let f = 0, g; f < a.index.length; f++) {
     if (g = a.index[f], b >= g.length) {
@@ -503,12 +510,12 @@ function S(a) {
     }
     if ("slice" === e) {
       return function(d, f) {
-        return ya(b, d || 0, f || b.length, !1);
+        return Aa(b, d || 0, f || b.length, !1);
       };
     }
     if ("splice" === e) {
       return function(d, f) {
-        return ya(b, d || 0, f || b.length, !0);
+        return Aa(b, d || 0, f || b.length, !0);
       };
     }
     if ("constructor" === e) {
@@ -539,7 +546,7 @@ function T(a = 8) {
   this.index = B();
   this.B = [];
   this.size = 0;
-  32 < a ? (this.h = za, this.A = BigInt(a)) : (this.h = Aa, this.A = a);
+  32 < a ? (this.h = Ba, this.A = BigInt(a)) : (this.h = Ca, this.A = a);
 }
 T.prototype.get = function(a) {
   const b = this.index[this.h(a)];
@@ -556,7 +563,7 @@ function U(a = 8) {
   }
   this.index = B();
   this.h = [];
-  32 < a ? (this.B = za, this.A = BigInt(a)) : (this.B = Aa, this.A = a);
+  32 < a ? (this.B = Ba, this.A = BigInt(a)) : (this.B = Ca, this.A = a);
 }
 U.prototype.add = function(a) {
   var b = this.B(a);
@@ -598,7 +605,7 @@ t.entries = U.prototype.entries = function*() {
     }
   }
 };
-function Aa(a) {
+function Ca(a) {
   let b = 2 ** this.A - 1;
   if ("number" == typeof a) {
     return a & b;
@@ -609,7 +616,7 @@ function Aa(a) {
   }
   return 32 === this.A ? c + 2 ** 31 : c;
 }
-function za(a) {
+function Ba(a) {
   let b = BigInt(2) ** this.A - BigInt(1);
   var c = typeof a;
   if ("bigint" === c) {
@@ -639,7 +646,7 @@ function za(a) {
         d && e.add(a, d, !1, !0);
       } else {
         if (d = h.I, !d || d(b)) {
-          h.constructor === String ? h = ["" + h] : E(h) && (h = [h]), Ba(b, h, this.J, 0, e, a, h[0], c);
+          h.constructor === String ? h = ["" + h] : E(h) && (h = [h]), Da(b, h, this.J, 0, e, a, h[0], c);
         }
       }
     }
@@ -702,7 +709,7 @@ function za(a) {
             k[l] = b[l];
             continue;
           }
-          Ca(b, k, l, 0, l[0], m);
+          Ea(b, k, l, 0, l[0], m);
         }
       }
       this.store.set(a, k || b);
@@ -710,21 +717,21 @@ function za(a) {
   }
   return this;
 };
-function Ca(a, b, c, e, d, f) {
+function Ea(a, b, c, e, d, f) {
   a = a[d];
   if (e === c.length - 1) {
     b[d] = f || a;
   } else if (a) {
     if (a.constructor === Array) {
       for (b = b[d] = Array(a.length), d = 0; d < a.length; d++) {
-        Ca(a, b, c, e, d);
+        Ea(a, b, c, e, d);
       }
     } else {
-      b = b[d] || (b[d] = B()), d = c[++e], Ca(a, b, c, e, d);
+      b = b[d] || (b[d] = B()), d = c[++e], Ea(a, b, c, e, d);
     }
   }
 }
-function Ba(a, b, c, e, d, f, g, k) {
+function Da(a, b, c, e, d, f, g, k) {
   if (a = a[g]) {
     if (e === b.length - 1) {
       if (a.constructor === Array) {
@@ -740,17 +747,17 @@ function Ba(a, b, c, e, d, f, g, k) {
     } else {
       if (a.constructor === Array) {
         for (g = 0; g < a.length; g++) {
-          Ba(a, b, c, e, d, f, g, k);
+          Da(a, b, c, e, d, f, g, k);
         }
       } else {
-        g = b[++e], Ba(a, b, c, e, d, f, g, k);
+        g = b[++e], Da(a, b, c, e, d, f, g, k);
       }
     }
   } else {
     d.db && d.remove(f);
   }
 }
-;function Da(a, b, c, e, d, f, g) {
+;function Fa(a, b, c, e, d, f, g) {
   const k = a.length;
   let h = [], l;
   var m;
@@ -766,7 +773,7 @@ function Ba(a, b, c, e, d, f, g, k) {
   }
   if (a = h.length) {
     if (d) {
-      h = 1 < h.length ? Ea(h, c, e, g, f) : (h = h[0]).length > c || e ? h.slice(e, c + e) : h;
+      h = 1 < h.length ? Ga(h, c, e, g, f) : (h = h[0]).length > c || e ? h.slice(e, c + e) : h;
     } else {
       if (a < k) {
         return [];
@@ -799,7 +806,7 @@ function Ba(a, b, c, e, d, f, g, k) {
   }
   return h;
 }
-function Ea(a, b, c, e, d) {
+function Ga(a, b, c, e, d) {
   const f = [], g = B();
   let k;
   var h = a.length;
@@ -844,7 +851,7 @@ function Ea(a, b, c, e, d) {
   }
   return f;
 }
-function Fa(a, b, c) {
+function Ha(a, b, c) {
   const e = B(), d = [];
   for (let f = 0, g; f < b.length; f++) {
     g = b[f];
@@ -865,7 +872,7 @@ function Fa(a, b, c) {
   }
   return d;
 }
-;function Ga(a, b, c, e) {
+;function Ia(a, b, c, e) {
   if (!a.length) {
     return a;
   }
@@ -896,7 +903,7 @@ function Fa(a, b, c) {
   d = 1 < d.length ? [].concat.apply([], d) : d[0];
   return e ? W.call(this, d) : d;
 }
-;function Ha(a, b, c) {
+;function Ja(a, b, c) {
   var e = c[0];
   if (e.then) {
     return Promise.all(c).then(function(m) {
@@ -943,10 +950,10 @@ function Fa(a, b, c) {
   return {O:e, P:d, limit:f, offset:g, enrich:k, resolve:h, suggest:l};
 }
 ;X.prototype.or = function() {
-  const {O:a, P:b, limit:c, offset:e, enrich:d, resolve:f} = Ha(this, "or", arguments);
-  return Ia.call(this, a, b, c, e, d, f);
+  const {O:a, P:b, limit:c, offset:e, enrich:d, resolve:f} = Ja(this, "or", arguments);
+  return Ka.call(this, a, b, c, e, d, f);
 };
-function Ia(a, b, c, e, d, f) {
+function Ka(a, b, c, e, d, f) {
   if (b.length) {
     const g = this;
     return Promise.all(b).then(function(k) {
@@ -954,10 +961,10 @@ function Ia(a, b, c, e, d, f) {
       for (let h = 0, l; h < k.length; h++) {
         (l = k[h]).length && (a[h] = l);
       }
-      return Ia.call(g, a, [], c, e, d, f);
+      return Ka.call(g, a, [], c, e, d, f);
     });
   }
-  a.length && (this.result.length && a.push(this.result), 2 > a.length ? this.result = a[0] : (this.result = Ea(a, c, e, !1, this.h), e = 0));
+  a.length && (this.result.length && a.push(this.result), 2 > a.length ? this.result = a[0] : (this.result = Ga(a, c, e, !1, this.h), e = 0));
   return f ? this.resolve(c, e, d) : this;
 }
 ;X.prototype.and = function() {
@@ -967,12 +974,12 @@ function Ia(a, b, c, e, d, f) {
     f && (a = !!f.suggest, d = f.resolve, b = f.limit, c = f.offset, e = f.enrich && d);
   }
   if (a) {
-    const {O:f, P:g, limit:k, offset:h, enrich:l, resolve:m, suggest:n} = Ha(this, "and", arguments);
-    return Ja.call(this, f, g, k, h, l, m, n);
+    const {O:f, P:g, limit:k, offset:h, enrich:l, resolve:m, suggest:n} = Ja(this, "and", arguments);
+    return La.call(this, f, g, k, h, l, m, n);
   }
   return d ? this.resolve(b, c, e) : this;
 };
-function Ja(a, b, c, e, d, f, g) {
+function La(a, b, c, e, d, f, g) {
   if (b.length) {
     const k = this;
     return Promise.all(b).then(function(h) {
@@ -980,7 +987,7 @@ function Ja(a, b, c, e, d, f, g) {
       for (let l = 0, m; l < h.length; l++) {
         (m = h[l]).length && (a[l] = m);
       }
-      return Ja.call(k, a, [], c, e, d, f, g);
+      return La.call(k, a, [], c, e, d, f, g);
     });
   }
   if (a.length) {
@@ -988,7 +995,7 @@ function Ja(a, b, c, e, d, f, g) {
       this.result = a[0];
     } else {
       if (b = ca(a)) {
-        return this.result = Da(a, b, c, e, g, this.h, f), f ? d ? W.call(this.index, this.result) : this.result : this;
+        return this.result = Fa(a, b, c, e, g, this.h, f), f ? d ? W.call(this.index, this.result) : this.result : this;
       }
       this.result = [];
     }
@@ -998,10 +1005,10 @@ function Ja(a, b, c, e, d, f, g) {
   return f ? this.resolve(c, e, d) : this;
 }
 ;X.prototype.xor = function() {
-  const {O:a, P:b, limit:c, offset:e, enrich:d, resolve:f, suggest:g} = Ha(this, "xor", arguments);
-  return Ka.call(this, a, b, c, e, d, f, g);
+  const {O:a, P:b, limit:c, offset:e, enrich:d, resolve:f, suggest:g} = Ja(this, "xor", arguments);
+  return Ma.call(this, a, b, c, e, d, f, g);
 };
-function Ka(a, b, c, e, d, f, g) {
+function Ma(a, b, c, e, d, f, g) {
   if (b.length) {
     const k = this;
     return Promise.all(b).then(function(h) {
@@ -1009,21 +1016,21 @@ function Ka(a, b, c, e, d, f, g) {
       for (let l = 0, m; l < h.length; l++) {
         (m = h[l]).length && (a[l] = m);
       }
-      return Ka.call(k, a, [], c, e, d, f, g);
+      return Ma.call(k, a, [], c, e, d, f, g);
     });
   }
   if (a.length) {
     if (this.result.length && a.unshift(this.result), 2 > a.length) {
       this.result = a[0];
     } else {
-      return this.result = La.call(this, a, c, e, f, this.h), f ? d ? W.call(this.index, this.result) : this.result : this;
+      return this.result = Na.call(this, a, c, e, f, this.h), f ? d ? W.call(this.index, this.result) : this.result : this;
     }
   } else {
     g || (this.result = a);
   }
   return f ? this.resolve(c, e, d) : this;
 }
-function La(a, b, c, e, d) {
+function Na(a, b, c, e, d) {
   const f = [], g = B();
   let k = 0;
   for (let h = 0, l; h < a.length; h++) {
@@ -1069,10 +1076,10 @@ function La(a, b, c, e, d) {
   return f;
 }
 ;X.prototype.not = function() {
-  const {O:a, P:b, limit:c, offset:e, enrich:d, resolve:f, suggest:g} = Ha(this, "not", arguments);
-  return Ma.call(this, a, b, c, e, d, f, g);
+  const {O:a, P:b, limit:c, offset:e, enrich:d, resolve:f, suggest:g} = Ja(this, "not", arguments);
+  return Oa.call(this, a, b, c, e, d, f, g);
 };
-function Ma(a, b, c, e, d, f, g) {
+function Oa(a, b, c, e, d, f, g) {
   if (b.length) {
     const k = this;
     return Promise.all(b).then(function(h) {
@@ -1080,17 +1087,17 @@ function Ma(a, b, c, e, d, f, g) {
       for (let l = 0, m; l < h.length; l++) {
         (m = h[l]).length && (a[l] = m);
       }
-      return Ma.call(k, a, [], c, e, d, f, g);
+      return Oa.call(k, a, [], c, e, d, f, g);
     });
   }
   if (a.length && this.result.length) {
-    this.result = Na.call(this, a, c, e, f);
+    this.result = Pa.call(this, a, c, e, f);
   } else if (f) {
     return this.resolve(c, e, d);
   }
   return f ? d ? W.call(this.index, this.result) : this.result : this;
 }
-function Na(a, b, c, e) {
+function Pa(a, b, c, e) {
   const d = [];
   a = new Set(a.flat().flat());
   for (let f = 0, g, k = 0; f < this.result.length; f++) {
@@ -1165,7 +1172,7 @@ X.prototype.boost = function(a) {
 X.prototype.resolve = function(a, b, c) {
   const e = this.result, d = this.index;
   this.result = this.index = null;
-  return e.length ? ("object" === typeof a && (c = a.enrich, b = a.offset, a = a.limit), Ga.call(d, e, a || 100, b, c)) : e;
+  return e.length ? ("object" === typeof a && (c = a.enrich, b = a.offset, a = a.limit), Ia.call(d, e, a || 100, b, c)) : e;
 };
 B();
 V.prototype.search = function(a, b, c, e) {
@@ -1244,7 +1251,7 @@ V.prototype.search = function(a, b, c, e) {
               }
               q.push(r = r.db.tag(v[p + 1], b, l, u));
             } else {
-              r = Oa.call(this, v[p], v[p + 1], b, l, u);
+              r = Qa.call(this, v[p], v[p + 1], b, l, u);
             }
             d.push({field:v[p], tag:v[p + 1], result:r});
           }
@@ -1296,7 +1303,7 @@ V.prototype.search = function(a, b, c, e) {
           }
         }
       } else {
-        for (let G = 0, K, mb; G < p.length; G += 2) {
+        for (let G = 0, K, ob; G < p.length; G += 2) {
           K = this.tag.get(p[G]);
           if (!K) {
             if (console.warn("Tag '" + p[G] + ":" + p[G + 1] + "' will be skipped because there is no field '" + p[G] + "'."), q) {
@@ -1305,7 +1312,7 @@ V.prototype.search = function(a, b, c, e) {
               return r ? d : new X(d);
             }
           }
-          if (mb = (K = K && K.get(p[G + 1])) && K.length) {
+          if (ob = (K = K && K.get(p[G + 1])) && K.length) {
             y++, x.push(K);
           } else if (!q) {
             return r ? d : new X(d);
@@ -1313,7 +1320,7 @@ V.prototype.search = function(a, b, c, e) {
         }
       }
       if (y) {
-        w = Fa(w, x, r);
+        w = Ha(w, x, r);
         H = w.length;
         if (!H && !q) {
           return r ? w : new X(w);
@@ -1367,12 +1374,12 @@ V.prototype.search = function(a, b, c, e) {
       for (let D = 0; D < w.length; D++) {
         d[D].result = w[D];
       }
-      return k ? Pa(d, b) : n ? Qa(d, a, z.index, z.field, z.D, n) : d;
+      return k ? Ra(d, b) : n ? Sa(d, a, z.index, z.field, z.D, n) : d;
     });
   }
-  return k ? Pa(d, b) : n ? Qa(d, a, this.index, this.field, this.D, n) : d;
+  return k ? Ra(d, b) : n ? Sa(d, a, this.index, this.field, this.D, n) : d;
 };
-function Qa(a, b, c, e, d, f) {
+function Sa(a, b, c, e, d, f) {
   let g, k, h;
   for (let m = 0, n, p, q, r, u; m < a.length; m++) {
     n = a[m].result;
@@ -1414,7 +1421,7 @@ function Qa(a, b, c, e, d, f) {
   }
   return a;
 }
-function Pa(a, b) {
+function Ra(a, b) {
   const c = [], e = B();
   for (let d = 0, f, g; d < a.length; d++) {
     f = a[d];
@@ -1433,7 +1440,7 @@ function Pa(a, b) {
   }
   return c;
 }
-function Oa(a, b, c, e, d) {
+function Qa(a, b, c, e, d) {
   let f = this.tag.get(a);
   if (!f) {
     return console.warn("Tag '" + a + "' was not found"), [];
@@ -1465,7 +1472,7 @@ function W(a) {
   this.D = [];
   this.field = [];
   this.J = [];
-  this.key = (c = b.key || b.id) && Ra(c, this.J) || "id";
+  this.key = (c = b.key || b.id) && Ta(c, this.J) || "id";
   (e = a.keystore || 0) && (this.keystore = e);
   this.reg = (this.fastupdate = !!a.fastupdate) ? e ? new T(e) : new Map() : e ? new U(e) : new Set();
   this.C = (c = b.store || null) && c && !0 !== c && [];
@@ -1473,7 +1480,7 @@ function W(a) {
   this.cache = (c = a.cache || null) && new Y(c);
   a.cache = !1;
   this.worker = a.worker;
-  this.index = Sa.call(this, a, b);
+  this.index = Ua.call(this, a, b);
   this.tag = null;
   if (c = b.tag) {
     if ("string" === typeof c && (c = [c]), c.length) {
@@ -1486,7 +1493,7 @@ function W(a) {
         if (!g) {
           throw Error("The tag field from the document descriptor is undefined.");
         }
-        f.custom ? this.F[d] = f.custom : (this.F[d] = Ra(g, this.J), f.filter && ("string" === typeof this.F[d] && (this.F[d] = new String(this.F[d])), this.F[d].I = f.filter));
+        f.custom ? this.F[d] = f.custom : (this.F[d] = Ta(g, this.J), f.filter && ("string" === typeof this.F[d] && (this.F[d] = new String(this.F[d])), this.F[d].I = f.filter));
         this.R[d] = g;
         this.tag.set(g, new Map());
       }
@@ -1519,7 +1526,7 @@ t.mount = function(a) {
     for (let d = 0, f; d < this.R.length; d++) {
       f = this.R[d];
       var c = void 0;
-      this.index.set(f, c = new M({}, this.reg));
+      this.index.set(f, c = new O({}, this.reg));
       b === this.field && (b = b.slice(0));
       b.push(f);
       c.tag = this.tag.get(f);
@@ -1554,7 +1561,7 @@ t.destroy = function() {
   }
   return Promise.all(a);
 };
-function Sa(a, b) {
+function Ua(a, b) {
   const c = new Map();
   let e = b.index || b.field || b;
   E(e) && (e = [e]);
@@ -1563,23 +1570,23 @@ function Sa(a, b) {
     E(f) || (g = f, f = f.field);
     g = I(g) ? Object.assign({}, a, g) : a;
     if (this.worker) {
-      const k = new N(g);
+      const k = new Q(g);
       c.set(f, k);
     }
-    this.worker || c.set(f, new M(g, this.reg));
-    g.custom ? this.D[d] = g.custom : (this.D[d] = Ra(f, this.J), g.filter && ("string" === typeof this.D[d] && (this.D[d] = new String(this.D[d])), this.D[d].I = g.filter));
+    this.worker || c.set(f, new O(g, this.reg));
+    g.custom ? this.D[d] = g.custom : (this.D[d] = Ta(f, this.J), g.filter && ("string" === typeof this.D[d] && (this.D[d] = new String(this.D[d])), this.D[d].I = g.filter));
     this.field[d] = f;
   }
   if (this.C) {
     a = b.store;
     E(a) && (a = [a]);
     for (let d = 0, f, g; d < a.length; d++) {
-      f = a[d], g = f.field || f, f.custom ? (this.C[d] = f.custom, f.custom.V = g) : (this.C[d] = Ra(g, this.J), f.filter && ("string" === typeof this.C[d] && (this.C[d] = new String(this.C[d])), this.C[d].I = f.filter));
+      f = a[d], g = f.field || f, f.custom ? (this.C[d] = f.custom, f.custom.V = g) : (this.C[d] = Ta(g, this.J), f.filter && ("string" === typeof this.C[d] && (this.C[d] = new String(this.C[d])), this.C[d].I = f.filter));
     }
   }
   return c;
 }
-function Ra(a, b) {
+function Ta(a, b) {
   const c = a.split(":");
   let e = 0;
   for (let d = 0; d < c.length; d++) {
@@ -1645,7 +1652,7 @@ t.set = function(a, b) {
   this.store.set(a, b);
   return this;
 };
-t.searchCache = Ta;
+t.searchCache = Va;
 t.export = function(a, b, c = 0, e = 0) {
   if (c < this.field.length) {
     const g = this.field[c];
@@ -1661,17 +1668,17 @@ t.export = function(a, b, c = 0, e = 0) {
   switch(e) {
     case 0:
       d = "reg";
-      f = va(this.reg);
+      f = xa(this.reg);
       b = null;
       break;
     case 1:
       d = "tag";
-      f = ta(this.tag, this.reg.size);
+      f = va(this.tag, this.reg.size);
       b = null;
       break;
     case 2:
       d = "doc";
-      f = ra(this.store);
+      f = ta(this.store);
       b = null;
       break;
     case 3:
@@ -1681,7 +1688,7 @@ t.export = function(a, b, c = 0, e = 0) {
     default:
       return;
   }
-  return xa.call(this, a, b, d, f, c, e);
+  return za.call(this, a, b, d, f, c, e);
 };
 t.import = function(a, b) {
   if (b) {
@@ -1696,21 +1703,21 @@ t.import = function(a, b) {
     switch(a) {
       case "reg":
         this.fastupdate = !1;
-        this.reg = wa(b, this.reg);
+        this.reg = ya(b, this.reg);
         for (let e = 0, d; e < this.field.length; e++) {
           d = this.index.get(this.field[e]), d.fastupdate = !1, d.reg = this.reg;
         }
         break;
       case "tag":
-        this.tag = ua(b, this.tag);
+        this.tag = wa(b, this.tag);
         break;
       case "doc":
-        this.store = sa(b, this.store);
+        this.store = ua(b, this.store);
     }
   }
 };
-na(V.prototype);
-function Ta(a, b, c) {
+la(V.prototype);
+function Va(a, b, c) {
   a = ("object" === typeof a ? "" + a.query : a).toLowerCase();
   this.cache || (this.cache = new Y());
   let e = this.cache.get(a);
@@ -1751,32 +1758,32 @@ Y.prototype.clear = function() {
   this.cache.clear();
   this.h = "";
 };
-const Ua = {normalize:function(a) {
+const Wa = {normalize:function(a) {
   return a.toLowerCase();
 }};
-const Va = new Map([["b", "p"], ["v", "f"], ["w", "f"], ["z", "s"], ["x", "s"], ["d", "t"], ["n", "m"], ["c", "k"], ["g", "k"], ["j", "k"], ["q", "k"], ["i", "e"], ["y", "e"], ["u", "o"]]);
-const Wa = new Map([["ae", "a"], ["oe", "o"], ["sh", "s"], ["kh", "k"], ["th", "t"], ["pf", "f"]]), Xa = [/([^aeo])h(.)/g, "$1$2", /([aeo])h([^aeo]|$)/g, "$1$2", /([^0-9])\1+/g, "$1"];
-const Ya = {a:"", e:"", i:"", o:"", u:"", y:"", b:1, f:1, p:1, v:1, c:2, g:2, j:2, k:2, q:2, s:2, x:2, z:2, "\u00df":2, d:3, t:3, l:4, m:5, n:5, r:6};
-const Za = /[\x00-\x7F]+/g;
-const $a = /[\x00-\x7F]+/g;
+const Xa = new Map([["b", "p"], ["v", "f"], ["w", "f"], ["z", "s"], ["x", "s"], ["d", "t"], ["n", "m"], ["c", "k"], ["g", "k"], ["j", "k"], ["q", "k"], ["i", "e"], ["y", "e"], ["u", "o"]]);
+const Ya = new Map([["ae", "a"], ["oe", "o"], ["sh", "s"], ["kh", "k"], ["th", "t"], ["pf", "f"]]), Za = [/([^aeo])h(.)/g, "$1$2", /([aeo])h([^aeo]|$)/g, "$1$2", /([^0-9])\1+/g, "$1"];
+const $a = {a:"", e:"", i:"", o:"", u:"", y:"", b:1, f:1, p:1, v:1, c:2, g:2, j:2, k:2, q:2, s:2, x:2, z:2, "\u00df":2, d:3, t:3, l:4, m:5, n:5, r:6};
 const ab = /[\x00-\x7F]+/g;
-var bb = {LatinExact:{normalize:!1, dedupe:!1}, LatinDefault:Ua, LatinSimple:{normalize:!0, dedupe:!0}, LatinBalance:{normalize:!0, dedupe:!0, mapper:Va}, LatinAdvanced:{normalize:!0, dedupe:!0, mapper:Va, matcher:Wa, replacer:Xa}, LatinExtra:{normalize:!0, dedupe:!0, mapper:Va, replacer:Xa.concat([/(?!^)[aeo]/g, ""]), matcher:Wa}, LatinSoundex:{normalize:!0, dedupe:!1, include:{letter:!0}, finalize:function(a) {
+const bb = /[\x00-\x7F]+/g;
+const cb = /[\x00-\x7F]+/g;
+var db = {LatinExact:{normalize:!1, dedupe:!1}, LatinDefault:Wa, LatinSimple:{normalize:!0, dedupe:!0}, LatinBalance:{normalize:!0, dedupe:!0, mapper:Xa}, LatinAdvanced:{normalize:!0, dedupe:!0, mapper:Xa, matcher:Ya, replacer:Za}, LatinExtra:{normalize:!0, dedupe:!0, mapper:Xa, replacer:Za.concat([/(?!^)[aeo]/g, ""]), matcher:Ya}, LatinSoundex:{normalize:!0, dedupe:!1, include:{letter:!0}, finalize:function(a) {
   for (let c = 0; c < a.length; c++) {
     var b = a[c];
-    let e = b.charAt(0), d = Ya[e];
-    for (let f = 1, g; f < b.length && (g = b.charAt(f), "h" === g || "w" === g || !(g = Ya[g]) || g === d || (e += g, d = g, 4 !== e.length)); f++) {
+    let e = b.charAt(0), d = $a[e];
+    for (let f = 1, g; f < b.length && (g = b.charAt(f), "h" === g || "w" === g || !(g = $a[g]) || g === d || (e += g, d = g, 4 !== e.length)); f++) {
     }
     a[c] = e;
   }
 }}, ArabicDefault:{rtl:!0, normalize:!1, dedupe:!0, prepare:function(a) {
-  return ("" + a).replace(Za, " ");
-}}, CjkDefault:{normalize:!1, dedupe:!0, split:"", prepare:function(a) {
-  return ("" + a).replace($a, "");
-}}, CyrillicDefault:{normalize:!1, dedupe:!0, prepare:function(a) {
   return ("" + a).replace(ab, " ");
+}}, CjkDefault:{normalize:!1, dedupe:!0, split:"", prepare:function(a) {
+  return ("" + a).replace(bb, "");
+}}, CyrillicDefault:{normalize:!1, dedupe:!0, prepare:function(a) {
+  return ("" + a).replace(cb, " ");
 }}};
-const cb = {memory:{resolution:1}, performance:{resolution:6, fastupdate:!0, context:{depth:1, resolution:3}}, match:{tokenize:"forward"}, score:{resolution:9, context:{depth:2, resolution:9}}};
-M.prototype.add = function(a, b, c, e) {
+const eb = {memory:{resolution:1}, performance:{resolution:6, fastupdate:!0, context:{depth:1, resolution:3}}, match:{tokenize:"forward"}, score:{resolution:9, context:{depth:2, resolution:9}}};
+O.prototype.add = function(a, b, c, e) {
   if (b && (a || 0 === a)) {
     if (!e && !c && this.reg.has(a)) {
       return this.update(a, b);
@@ -1788,15 +1795,15 @@ M.prototype.add = function(a, b, c, e) {
         let r = b[this.rtl ? e - 1 - q : q];
         var d = r.length;
         if (d && (n || !m[r])) {
-          var f = this.score ? this.score(b, r, q, null, 0) : db(p, e, q), g = "";
+          var f = this.score ? this.score(b, r, q, null, 0) : fb(p, e, q), g = "";
           switch(this.tokenize) {
             case "full":
               if (2 < d) {
                 for (f = 0; f < d; f++) {
                   for (var k = d; k > f; k--) {
                     g = r.substring(f, k);
-                    var h = this.score ? this.score(b, r, q, g, f) : db(p, e, q, d, f);
-                    eb(this, m, g, h, a, c);
+                    var h = this.score ? this.score(b, r, q, g, f) : fb(p, e, q, d, f);
+                    gb(this, m, g, h, a, c);
                   }
                 }
                 break;
@@ -1804,24 +1811,24 @@ M.prototype.add = function(a, b, c, e) {
             case "reverse":
               if (1 < d) {
                 for (k = d - 1; 0 < k; k--) {
-                  g = r[k] + g, h = this.score ? this.score(b, r, q, g, k) : db(p, e, q, d, k), eb(this, m, g, h, a, c);
+                  g = r[k] + g, h = this.score ? this.score(b, r, q, g, k) : fb(p, e, q, d, k), gb(this, m, g, h, a, c);
                 }
                 g = "";
               }
             case "forward":
               if (1 < d) {
                 for (k = 0; k < d; k++) {
-                  g += r[k], eb(this, m, g, f, a, c);
+                  g += r[k], gb(this, m, g, f, a, c);
                 }
                 break;
               }
             default:
-              if (eb(this, m, r, f, a, c), n && 1 < e && q < e - 1) {
+              if (gb(this, m, r, f, a, c), n && 1 < e && q < e - 1) {
                 for (d = B(), g = this.U, f = r, k = Math.min(n + 1, e - q), d[f] = 1, h = 1; h < k; h++) {
                   if ((r = b[this.rtl ? e - 1 - q - h : q + h]) && !d[r]) {
                     d[r] = 1;
-                    const u = this.score ? this.score(b, f, q, r, h) : db(g + (e / 2 > g ? 0 : 1), e, q, k - 1, h - 1), v = this.bidirectional && r > f;
-                    eb(this, l, v ? f : r, u, a, c, v ? r : f);
+                    const u = this.score ? this.score(b, f, q, r, h) : fb(g + (e / 2 > g ? 0 : 1), e, q, k - 1, h - 1), v = this.bidirectional && r > f;
+                    gb(this, l, v ? f : r, u, a, c, v ? r : f);
                   }
                 }
               }
@@ -1833,10 +1840,10 @@ M.prototype.add = function(a, b, c, e) {
       b = "";
     }
   }
-  this.db && (b || this.commit_task.push({del:a}), this.T && fb(this));
+  this.db && (b || this.commit_task.push({del:a}), this.T && hb(this));
   return this;
 };
-function eb(a, b, c, e, d, f, g) {
+function gb(a, b, c, e, d, f, g) {
   let k = g ? a.ctx : a.map, h;
   if (!b[c] || g && !(h = b[c])[g]) {
     if (g ? (b = h || (b[c] = B()), b[g] = 1, (h = k.get(g)) ? k = h : k.set(g, k = new Map())) : b[c] = 1, (h = k.get(c)) ? k = h : k.set(c, k = h = []), k = k[e] || (k[e] = []), !f || !k.includes(d)) {
@@ -1854,10 +1861,10 @@ function eb(a, b, c, e, d, f, g) {
     }
   }
 }
-function db(a, b, c, e, d) {
+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) {
+;O.prototype.search = function(a, b, c) {
   c || (!b && I(a) ? (c = a, a = "") : I(b) && (c = b, b = 0));
   let e = [], d, f, g, k = 0, h, l, m, n, p;
   c ? (a = c.query || a, b = c.limit || b, k = c.offset || 0, f = c.context, g = c.suggest, p = (h = !1 !== c.resolve) && c.enrich, m = c.boost, n = c.resolution, l = this.db && c.tag) : h = this.resolve;
@@ -1865,11 +1872,11 @@ function db(a, b, c, e, d) {
   d = q.length;
   b = b || (h ? 100 : 0);
   if (1 === d) {
-    return gb.call(this, q[0], "", b, k, h, p, l);
+    return ib.call(this, q[0], "", b, k, h, p, l);
   }
   f = this.depth && !1 !== f;
   if (2 === d && f && !g) {
-    return gb.call(this, q[0], q[1], b, k, h, p, l);
+    return ib.call(this, q[0], q[1], b, k, h, p, l);
   }
   let r = B(), u = 0, v;
   1 < d && f && (v = q[0], u = 1);
@@ -1883,8 +1890,8 @@ function db(a, b, c, e, d) {
       for (let y, F; u < d; u++) {
         if ((F = q[u]) && !r[F]) {
           r[F] = 1;
-          y = await hb(x, F, v, 0, 0, !1, !1);
-          if (y = ib(y, e, g, n)) {
+          y = await jb(x, F, v, 0, 0, !1, !1);
+          if (y = kb(y, e, g, n)) {
             e = y;
             break;
           }
@@ -1892,14 +1899,14 @@ function db(a, b, c, e, d) {
         }
         g && v && u === d - 1 && !e.length && (v = "", u = -1, r = B());
       }
-      return jb(e, n, b, k, g, m, h);
+      return lb(e, n, b, k, g, m, h);
     }();
   }
   for (let x, y; u < d; u++) {
     if ((y = q[u]) && !r[y]) {
       r[y] = 1;
-      x = hb(this, y, v, 0, 0, !1, !1);
-      if (x = ib(x, e, g, n)) {
+      x = jb(this, y, v, 0, 0, !1, !1);
+      if (x = kb(x, e, g, n)) {
         e = x;
         break;
       }
@@ -1907,24 +1914,24 @@ function db(a, b, c, e, d) {
     }
     g && v && u === d - 1 && !e.length && (v = "", u = -1, r = B());
   }
-  return jb(e, n, b, k, g, m, h);
+  return lb(e, n, b, k, g, m, h);
 };
-function jb(a, b, c, e, d, f, g) {
+function lb(a, b, c, e, d, f, g) {
   let k = a.length, h = a;
   if (1 < k) {
-    h = Da(a, b, c, e, d, f, g);
+    h = Fa(a, b, c, e, d, f, g);
   } else if (1 === k) {
-    return g ? Ga.call(null, a[0], c, e) : new X(a[0]);
+    return g ? Ia.call(null, a[0], c, e) : new X(a[0]);
   }
   return g ? h : new X(h);
 }
-function gb(a, b, c, e, d, f, g) {
-  a = hb(this, a, b, c, e, d, f, g);
+function ib(a, b, c, e, d, f, g) {
+  a = jb(this, a, b, c, e, d, f, g);
   return this.db ? a.then(function(k) {
     return d ? k || [] : new X(k);
-  }) : a && a.length ? d ? Ga.call(this, a, c, e) : new X(a) : d ? [] : new X();
+  }) : a && a.length ? d ? Ia.call(this, a, c, e) : new X(a) : d ? [] : new X();
 }
-function ib(a, b, c, e) {
+function kb(a, b, c, e) {
   let d = [];
   if (a && a.length) {
     if (a.length <= e) {
@@ -1945,7 +1952,7 @@ function ib(a, b, c, e) {
     return d;
   }
 }
-function hb(a, b, c, e, d, f, g, k) {
+function jb(a, b, c, e, d, f, g, k) {
   let h;
   c && (h = a.bidirectional && b > c) && (h = c, c = b, b = h);
   if (a.db) {
@@ -1954,7 +1961,7 @@ function hb(a, b, c, e, d, f, g, k) {
   a = c ? (a = a.ctx.get(c)) && a.get(b) : a.map.get(b);
   return a;
 }
-;M.prototype.remove = function(a, b) {
+;O.prototype.remove = function(a, b) {
   const c = this.reg.size && (this.fastupdate ? this.reg.get(a) : this.reg.has(a));
   if (c) {
     if (this.fastupdate) {
@@ -1969,15 +1976,15 @@ function hb(a, b, c, e, d, f, g, k) {
         }
       }
     } else {
-      kb(this.map, a), this.depth && kb(this.ctx, a);
+      mb(this.map, a), this.depth && mb(this.ctx, a);
     }
     b || this.reg.delete(a);
   }
-  this.db && (this.commit_task.push({del:a}), this.T && fb(this));
+  this.db && (this.commit_task.push({del:a}), this.T && hb(this));
   this.cache && this.cache.remove(a);
   return this;
 };
-function kb(a, b) {
+function mb(a, b) {
   let c = 0;
   if (a.constructor === Array) {
     for (let e = 0, d, f; e < a.length; e++) {
@@ -1992,24 +1999,24 @@ function kb(a, b) {
     }
   } else {
     for (let e of a.entries()) {
-      const d = e[0], f = kb(e[1], b);
+      const d = e[0], f = mb(e[1], b);
       f ? c += f : a.delete(d);
     }
   }
   return c;
 }
-;function M(a, b) {
-  if (!this || this.constructor !== M) {
-    return new M(a);
+;function O(a, b) {
+  if (!this || this.constructor !== O) {
+    return new O(a);
   }
   if (a) {
     var c = E(a) ? a : a.preset;
-    c && (cb[c] || console.warn("Preset not found: " + c), a = Object.assign({}, cb[c], a));
+    c && (eb[c] || console.warn("Preset not found: " + c), a = Object.assign({}, eb[c], a));
   } else {
     a = {};
   }
   c = a.context;
-  const e = !0 === c ? {depth:1} : c || {}, d = E(a.encoder) ? bb[a.encoder] : a.encode || a.encoder || Ua;
+  const e = !0 === c ? {depth:1} : c || {}, d = E(a.encoder) ? db[a.encoder] : a.encode || a.encoder || Wa;
   this.encoder = d.encode ? d : "object" === typeof d ? new J(d) : {encode:d};
   this.resolution = a.resolution || 9;
   this.tokenize = c = a.tokenize || "strict";
@@ -2033,7 +2040,7 @@ function kb(a, b) {
   this.commit_timer = null;
   this.priority = a.priority || 4;
 }
-t = M.prototype;
+t = O.prototype;
 t.mount = function(a) {
   this.commit_timer && (clearTimeout(this.commit_timer), this.commit_timer = null);
   return a.mount(this);
@@ -2046,7 +2053,7 @@ t.destroy = function() {
   this.commit_timer && (clearTimeout(this.commit_timer), this.commit_timer = null);
   return this.db.destroy();
 };
-function fb(a) {
+function hb(a) {
   a.commit_timer || (a.commit_timer = setTimeout(function() {
     a.commit_timer = null;
     a.db.commit(a, void 0, void 0);
@@ -2070,7 +2077,7 @@ 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);
 };
-function lb(a) {
+function nb(a) {
   let b = 0;
   if (a.constructor === Array) {
     for (let c = 0, e; c < a.length; c++) {
@@ -2078,7 +2085,7 @@ function lb(a) {
     }
   } else {
     for (const c of a) {
-      const e = c[0], d = lb(c[1]);
+      const e = c[0], d = nb(c[1]);
       d ? b += d : a.delete(e);
     }
   }
@@ -2088,17 +2095,17 @@ t.cleanup = function() {
   if (!this.fastupdate) {
     return console.info('Cleanup the index isn\'t required when not using "fastupdate".'), this;
   }
-  lb(this.map);
-  this.depth && lb(this.ctx);
+  nb(this.map);
+  this.depth && nb(this.ctx);
   return this;
 };
-t.searchCache = Ta;
+t.searchCache = Va;
 t.export = function(a, b, c = 0, e = 0) {
   let d, f;
   switch(e) {
     case 0:
       d = "reg";
-      f = va(this.reg);
+      f = xa(this.reg);
       break;
     case 1:
       d = "cfg";
@@ -2106,29 +2113,29 @@ t.export = function(a, b, c = 0, e = 0) {
       break;
     case 2:
       d = "map";
-      f = ra(this.map, this.reg.size);
+      f = ta(this.map, this.reg.size);
       break;
     case 3:
       d = "ctx";
-      f = ta(this.ctx, this.reg.size);
+      f = va(this.ctx, this.reg.size);
       break;
     default:
       return;
   }
-  return xa.call(this, a, b, d, f, c, e);
+  return za.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(), a = 1 < a.length ? a[1] : a[0], a) {
       case "reg":
         this.fastupdate = !1;
-        this.reg = wa(b, this.reg);
+        this.reg = ya(b, this.reg);
         break;
       case "map":
-        this.map = sa(b, this.map);
+        this.map = ua(b, this.map);
         break;
       case "ctx":
-        this.ctx = ua(b, this.ctx);
+        this.ctx = wa(b, this.ctx);
     }
   }
 };
@@ -2182,11 +2189,11 @@ t.serialize = function(a = !0) {
   d = "index.ctx=new Map([" + d + "]);";
   return a ? "function inject(index){" + b + e + d + "}" : b + e + d;
 };
-na(M.prototype);
-const nb = "undefined" !== typeof window && (window.indexedDB || window.mozIndexedDB || window.webkitIndexedDB || window.msIndexedDB), ob = ["map", "ctx", "tag", "reg", "cfg"];
-function pb(a, b = {}) {
+la(O.prototype);
+const pb = "undefined" !== typeof window && (window.indexedDB || window.mozIndexedDB || window.webkitIndexedDB || window.msIndexedDB), qb = ["map", "ctx", "tag", "reg", "cfg"];
+function rb(a, b = {}) {
   if (!this) {
-    return new pb(a, b);
+    return new rb(a, b);
   }
   "object" === typeof a && (b = a, a = a.name);
   a || console.info("Default storage space was used, because a name was not passed.");
@@ -2197,7 +2204,7 @@ function pb(a, b = {}) {
   this.db = null;
   this.h = {};
 }
-t = pb.prototype;
+t = rb.prototype;
 t.mount = function(a) {
   if (!a.encoder) {
     return a.mount(this);
@@ -2209,10 +2216,10 @@ t.open = function() {
   let a = this;
   navigator.storage && navigator.storage.persist();
   return this.db || new Promise(function(b, c) {
-    const e = nb.open(a.id + (a.field ? ":" + a.field : ""), 1);
+    const e = pb.open(a.id + (a.field ? ":" + a.field : ""), 1);
     e.onupgradeneeded = function() {
       const d = a.db = this.result;
-      ob.forEach(f => {
+      qb.forEach(f => {
         d.objectStoreNames.contains(f) || d.createObjectStore(f);
       });
     };
@@ -2238,13 +2245,13 @@ t.close = function() {
   this.db = null;
 };
 t.destroy = function() {
-  const a = nb.deleteDatabase(this.id + (this.field ? ":" + this.field : ""));
+  const a = pb.deleteDatabase(this.id + (this.field ? ":" + this.field : ""));
   return Z(a);
 };
 t.clear = function() {
-  const a = this.db.transaction(ob, "readwrite");
-  for (let b = 0; b < ob.length; b++) {
-    a.objectStore(ob[b]).clear();
+  const a = this.db.transaction(qb, "readwrite");
+  for (let b = 0; b < qb.length; b++) {
+    a.objectStore(qb[b]).clear();
   }
   return Z(a);
 };
@@ -2428,7 +2435,7 @@ t.commit = async function(a, b, c) {
     }
   }), a.map.clear(), a.ctx.clear(), a.tag && a.tag.clear(), a.store && a.store.clear(), a.document || a.reg.clear());
 };
-function qb(a, b, c) {
+function sb(a, b, c) {
   const e = a.value;
   let d, f, g = 0;
   for (let k = 0, h; k < e.length; k++) {
@@ -2457,17 +2464,17 @@ t.remove = function(a) {
   return Promise.all([this.transaction("map", "readwrite", function(b) {
     b.openCursor().onsuccess = function() {
       const c = this.result;
-      c && qb(c, a);
+      c && sb(c, a);
     };
   }), this.transaction("ctx", "readwrite", function(b) {
     b.openCursor().onsuccess = function() {
       const c = this.result;
-      c && qb(c, a);
+      c && sb(c, a);
     };
   }), this.transaction("tag", "readwrite", function(b) {
     b.openCursor().onsuccess = function() {
       const c = this.result;
-      c && qb(c, a, !0);
+      c && sb(c, a, !0);
     };
   }), this.transaction("reg", "readwrite", function(b) {
     for (let c = 0; c < a.length; c++) {
@@ -2487,6 +2494,6 @@ function Z(a) {
     a = null;
   });
 }
-;export default {Index:M, Charset:bb, Encoder:J, Document:V, Worker:N, Resolver:X, IndexedDB:pb, Language:{}};
+;export default {Index:O, Charset:db, Encoder:J, Document:V, Worker:Q, Resolver:X, IndexedDB:rb, Language:{}};
 
-export const Index=M;export const  Charset=bb;export const  Encoder=J;export const  Document=V;export const  Worker=N;export const  Resolver=X;export const  IndexedDB=pb;export const  Language={};
\ No newline at end of file
+export const Index=O;export const  Charset=db;export const  Encoder=J;export const  Document=V;export const  Worker=Q;export const  Resolver=X;export const  IndexedDB=rb;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 d359d0a..d43e6c5 100644
--- a/dist/flexsearch.bundle.module.min.js
+++ b/dist/flexsearch.bundle.module.min.js
@@ -1,5 +1,5 @@
 /**!
- * FlexSearch.js v0.8.107 (Bundle/Module)
+ * FlexSearch.js v0.8.108 (Bundle/Module)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
@@ -21,72 +21,72 @@ t.addMatcher=function(a,b){if("object"===typeof a)return this.addReplacer(a,b);i
 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(L,50,this);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(ha,"$1 $2").replace(ia,"$1 $2").replace(fa,"$1 "));const b=!(this.dedupe||this.mapper||this.filter||this.matcher||this.stemmer||this.replacer);let c=
 [],e=this.split||""===this.split?a.split(this.split):a;for(let f=0,g,k;f<e.length;f++)if((g=k=e[f])&&!(g.length<this.minlength))if(b)c.push(g);else if(!this.filter||!this.filter.has(g)){if(this.cache&&g.length<=this.L)if(this.H){var d=this.G.get(g);if(d||""===d){d&&c.push(d);continue}}else this.H=setTimeout(L,50,this);this.stemmer&&2<g.length&&(this.N||(this.N=new RegExp("(?!^)("+this.A+")$")),g=g.replace(this.N,h=>this.stemmer.get(h)),g.length<this.minlength||this.filter&&this.filter.has(g))&&(g=
 "");if(g&&(this.mapper||this.dedupe&&1<g.length)){d="";for(let h=0,l="",m,n;h<g.length;h++)m=g.charAt(h),m===l&&this.dedupe||((n=this.mapper&&this.mapper.get(m))||""===n?n===l&&this.dedupe||!(l=n)||(d+=n):d+=l=m);g=d}this.matcher&&1<g.length&&(this.M||(this.M=new RegExp("("+this.h+")","g")),g=g.replace(this.M,h=>this.matcher.get(h)));if(g&&this.replacer)for(d=0;g&&d<this.replacer.length;d+=2)g=g.replace(this.replacer[d],this.replacer[d+1]);this.cache&&k.length<=this.L&&(this.G.set(k,g),this.G.size>
-this.S&&(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 L(a){a.H=null;a.B.clear();a.G.clear()};async function ka(a){a=a.data;var b=self._index;const c=a.args;var e=a.task;switch(e){case "init":e=a.options||{};(b=a.factory)?(Function("return "+b)()(self),self._index=new self.FlexSearch.Index(e),delete self.FlexSearch):self._index=new M(e);postMessage({id:a.id});break;default:a=a.id,b=b[e].apply(b,c),postMessage("search"===e?{id:a,msg:b}:{id:a})}};let la=0;
-function N(a={}){function b(g){function k(h){h=h.data||h;const l=h.id,m=l&&d.h[l];m&&(m(h.msg),delete d.h[l])}this.worker=g;this.h=B();if(this.worker){e?this.worker.on("message",k):this.worker.onmessage=k;if(a.config)return new Promise(function(h){d.h[++la]=function(){h(d)};d.worker.postMessage({id:la,task:"init",factory:c,options:a})});this.worker.postMessage({task:"init",factory:c,options:a});return this}}if(!this||this.constructor!==N)return new N(a);let c="undefined"!==typeof self?self._factory:"undefined"!==
-typeof window?window._factory:null;c&&(c=c.toString());const e="undefined"===typeof window,d=this,f=ma(c,e,a.worker);return f.then?f.then(function(g){return b.call(d,g)}):b.call(this,f)}O("add");O("append");O("search");O("update");O("remove");
-function O(a){N.prototype[a]=N.prototype[a+"Async"]=async function(){const b=this,c=[].slice.call(arguments);var e=c[c.length-1];let d;"function"===typeof e&&(d=e,c.splice(c.length-1,1));e=new Promise(function(f){b.h[++la]=f;b.worker.postMessage({task:a,id:la,args:c})});return d?(e.then(d),this):e}}
-function ma(a,b,c){return b?"undefined"!==typeof module?new (require("worker_threads")["Worker"])(__dirname + "/node/node.js"):import("worker_threads").then(function(worker){ return new worker["Worker"](import.meta.dirname + "/node/node.mjs"); }):a?new window.Worker(URL.createObjectURL(new Blob(["onmessage="+ka.toString()],{type:"text/javascript"}))):new window.Worker(E(c)?c:import.meta.url.replace("/worker.js","/worker/worker.js").replace("flexsearch.bundle.module.min.js",
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-function P(a){this[a+"Async"]=function(){const b=arguments;var c=b[b.length-1];let e;"function"===typeof c&&(e=c,delete b[b.length-1]);Q||(Q=setTimeout(qa,0,a),oa=Date.now());R[a]||(R[a]=pa[a]=1E3);if(!--pa[a]){pa[a]=R[a]=R[a]*this.priority*this.priority*3/(Date.now()-oa)|0||1;Q=clearTimeout(Q);const f=this;return new Promise(g=>{setTimeout(function(){g(f[a+"Async"].apply(f,b))},0)})}const d=this[a].apply(this,b);c=d.then?d:new Promise(f=>f(d));e&&c.then(e);return c}};function ra(a,b=0){let c=[],e=[];b&&(b=25E4/b*5E3|0);for(const d of a.entries())e.push(d),e.length===b&&(c.push(e),e=[]);e.length&&c.push(e);return c}function sa(a,b){b||(b=new Map);for(let c=0,e;c<a.length;c++)e=a[c],b.set(e[0],e[1]);return b}function ta(a,b=0){let c=[],e=[];b&&(b=25E4/b*1E3|0);for(const d of a.entries())e.push([d[0],ra(d[1])[0]]),e.length===b&&(c.push(e),e=[]);e.length&&c.push(e);return c}
-function ua(a,b){b||(b=new Map);for(let c=0,e,d;c<a.length;c++)e=a[c],d=b.get(e[0]),b.set(e[0],sa(e[1],d));return b}function va(a){let b=[],c=[];for(const e of a.keys())c.push(e),25E4===c.length&&(b.push(c),c=[]);c.length&&b.push(c);return b}function wa(a,b){b||(b=new Set);for(let c=0;c<a.length;c++)b.add(a[c]);return b}
-function xa(a,b,c,e,d,f,g=0){const k=e&&e.constructor===Array;var h=k?e.shift():e;if(!h)return this.export(a,b,d,f+1);if((h=a((b?b+".":"")+(g+1)+"."+c,JSON.stringify(h)))&&h.then){const l=this;return h.then(function(){return xa.call(l,a,b,c,k?e:null,d,f,g+1)})}return xa.call(this,a,b,c,k?e:null,d,f,g+1)};function ya(a,b,c,e){let d=[];for(let f=0,g;f<a.index.length;f++)if(g=a.index[f],b>=g.length)b-=g.length;else{b=g[e?"splice":"slice"](b,c);const k=b.length;if(k&&(d=d.length?d.concat(b):b,c-=k,e&&(a.length-=k),!c))break;b=0}return d}
+this.S&&(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 L(a){a.H=null;a.B.clear();a.G.clear()};let M,N;async function ka(a){a=a.data;const b=a.task,c=a.id;let e=a.args;switch(b){case "init":N=a.options||{};(a=a.factory)?(Function("return "+a)()(self),M=new self.FlexSearch.Index(N),delete self.FlexSearch):M=new O(N);postMessage({id:c});break;default:let d;"export"===b&&(e=[N.export]);"import"===b?await N.import.call(M,M):d=M[b].apply(M,e);postMessage("search"===b?{id:c,msg:d}:{id:c})}};function la(a){P.call(a,"add");P.call(a,"append");P.call(a,"search");P.call(a,"update");P.call(a,"remove")}let ma,na;const oa={},pa={};function qa(a){ma=0;oa[a]=pa[a]}
+function P(a){this[a+"Async"]=function(){const b=arguments;var c=b[b.length-1];let e;"function"===typeof c&&(e=c,delete b[b.length-1]);ma||(ma=setTimeout(qa,0,a),na=Date.now());pa[a]||(pa[a]=oa[a]=1E3);if(!--oa[a]){oa[a]=pa[a]=pa[a]*this.priority*this.priority*3/(Date.now()-na)|0||1;ma=clearTimeout(ma);const f=this;return new Promise(g=>{setTimeout(function(){g(f[a+"Async"].apply(f,b))},0)})}const d=this[a].apply(this,b);c=d.then?d:new Promise(f=>f(d));e&&c.then(e);return c}};let ra=0;
+function Q(a={}){function b(g){function k(h){h=h.data||h;const l=h.id,m=l&&d.h[l];m&&(m(h.msg),delete d.h[l])}this.worker=g;this.h=B();if(this.worker){e?this.worker.on("message",k):this.worker.onmessage=k;if(a.config)return new Promise(function(h){d.h[++ra]=function(){h(d)};d.worker.postMessage({id:ra,task:"init",factory:c,options:a})});this.worker.postMessage({task:"init",factory:c,options:a});return this}}if(!this||this.constructor!==Q)return new Q(a);let c="undefined"!==typeof self?self._factory:"undefined"!==
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+function R(a){Q.prototype[a]=async function(){const b=this,c=[].slice.call(arguments);var e=c[c.length-1];let d;"function"===typeof e&&(d=e,c.splice(c.length-1,1));e=new Promise(function(f){b.h[++ra]=f;b.worker.postMessage({task:a,id:ra,args:c})});return d?(e.then(d),this):e}}
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+function mb(a,b){let c=0;if(a.constructor===Array)for(let e=0,d,f;e<a.length;e++){if((d=a[e])&&d.length)if(f=d.indexOf(b),0<=f){1<d.length?(d.splice(f,1),c++):delete a[e];break}else c++}else for(let e of a.entries()){const d=e[0],f=mb(e[1],b);f?c+=f:a.delete(d)}return c};function O(a,b){if(!this||this.constructor!==O)return new O(a);if(a){var c=E(a)?a:a.preset;c&&(a=Object.assign({},eb[c],a))}else a={};c=a.context;const e=!0===c?{depth:1}:c||{},d=E(a.encoder)?db[a.encoder]:a.encode||a.encoder||Wa;this.encoder=d.encode?d:"object"===typeof d?new J(d):{encode:d};this.resolution=a.resolution||9;this.tokenize=c=a.tokenize||"strict";this.depth="strict"===c&&e.depth||0;this.bidirectional=!1!==e.bidirectional;this.fastupdate=!!a.fastupdate;this.score=a.score||null;(c=a.keystore||
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+function ob(a){let b=0;if(a.constructor===Array)for(let c=0,e;c<a.length;c++)(e=a[c])&&(b+=e.length);else for(const c of a){const e=c[0],d=ob(c[1]);d?b+=d:a.delete(e)}return b}t.cleanup=function(){if(!this.fastupdate)return this;ob(this.map);this.depth&&ob(this.ctx);return this};t.searchCache=Va;
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@@ -95,7 +95,7 @@ t.commit=async function(a,b,c){if(b)await this.clear(),a.commit_task=[];else{let
 for(let m=0,n,p;m<l;m++)if((p=g[m])&&p.length){if((n=k[m])&&n.length)for(h=0;h<p.length;h++)n.push(p[h]);else k[m]=p;h=1}}else k=g,h=1;h&&e.put(k,f)})}}),await this.transaction("ctx","readwrite",function(e){for(const d of a.ctx){const f=d[0],g=d[1];for(const k of g){const h=k[0],l=k[1];l.length&&(b?e.put(l,f+":"+h):e.get(f+":"+h).onsuccess=function(){let m=this.result;var n;if(m&&m.length){const p=Math.max(m.length,l.length);for(let q=0,r,u;q<p;q++)if((u=l[q])&&u.length){if((r=m[q])&&r.length)for(n=
 0;n<u.length;n++)r.push(u[n]);else m[q]=u;n=1}}else m=l,n=1;n&&e.put(m,f+":"+h)})}}}),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 k=this.result;
 k=k&&k.length?k.concat(g):g;e.put(k,f)})}}),a.map.clear(),a.ctx.clear(),a.tag&&a.tag.clear(),a.store&&a.store.clear(),a.document||a.reg.clear())};
-function qb(a,b,c){const e=a.value;let d,f,g=0;for(let k=0,h;k<e.length;k++){if(h=c?e:e[k]){for(let l=0,m,n;l<b.length;l++)if(n=b[l],m=h.indexOf(f?parseInt(n,10):n),0>m&&!f&&"string"===typeof n&&!isNaN(n)&&(m=h.indexOf(parseInt(n,10)))&&(f=1),0<=m)if(d=1,1<h.length)h.splice(m,1);else{e[k]=[];break}g+=h.length}if(c)break}g?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&&qb(c,a)}}),this.transaction("ctx","readwrite",function(b){b.openCursor().onsuccess=function(){const c=this.result;c&&qb(c,a)}}),this.transaction("tag","readwrite",function(b){b.openCursor().onsuccess=function(){const c=this.result;c&&qb(c,a,!0)}}),this.transaction("reg","readwrite",function(b){for(let c=0;c<a.length;c++)b.delete(a[c])})])};
-function Z(a){return new Promise((b,c)=>{a.onsuccess=function(){b(this.result)};a.oncomplete=function(){b(this.result)};a.onerror=c;a=null})};export default {Index:M,Charset:bb,Encoder:J,Document:V,Worker:N,Resolver:X,IndexedDB:pb,Language:{}};
-export const Index=M;export const Charset=bb;export const Encoder=J;export const Document=V;export const Worker=N;export const Resolver=X;export const IndexedDB=pb;export const Language={};
\ No newline at end of file
+function sb(a,b,c){const e=a.value;let d,f,g=0;for(let k=0,h;k<e.length;k++){if(h=c?e:e[k]){for(let l=0,m,n;l<b.length;l++)if(n=b[l],m=h.indexOf(f?parseInt(n,10):n),0>m&&!f&&"string"===typeof n&&!isNaN(n)&&(m=h.indexOf(parseInt(n,10)))&&(f=1),0<=m)if(d=1,1<h.length)h.splice(m,1);else{e[k]=[];break}g+=h.length}if(c)break}g?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&&sb(c,a)}}),this.transaction("ctx","readwrite",function(b){b.openCursor().onsuccess=function(){const c=this.result;c&&sb(c,a)}}),this.transaction("tag","readwrite",function(b){b.openCursor().onsuccess=function(){const c=this.result;c&&sb(c,a,!0)}}),this.transaction("reg","readwrite",function(b){for(let c=0;c<a.length;c++)b.delete(a[c])})])};
+function Z(a){return new Promise((b,c)=>{a.onsuccess=function(){b(this.result)};a.oncomplete=function(){b(this.result)};a.onerror=c;a=null})};export default {Index:O,Charset:db,Encoder:J,Document:V,Worker:Q,Resolver:X,IndexedDB:rb,Language:{}};
+export const Index=O;export const Charset=db;export const Encoder=J;export const Document=V;export const Worker=Q;export const Resolver=X;export const IndexedDB=rb;export const Language={};
\ No newline at end of file
diff --git a/dist/flexsearch.compact.debug.js b/dist/flexsearch.compact.debug.js
index dc68519..3baf3af 100644
--- a/dist/flexsearch.compact.debug.js
+++ b/dist/flexsearch.compact.debug.js
@@ -1,5 +1,5 @@
 /**!
- * FlexSearch.js v0.8.107 (Bundle/Debug)
+ * FlexSearch.js v0.8.108 (Bundle/Debug)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
@@ -47,14 +47,14 @@ function A(a, c, b) {
 function C() {
   return Object.create(null);
 }
-function E(a) {
+function D(a) {
   return "string" === typeof a;
 }
-function I(a) {
+function H(a) {
   return "object" === typeof a;
 }
 function J(a, c) {
-  if (E(c)) {
+  if (D(c)) {
     a = a[c];
   } else {
     for (let b = 0; a && b < c.length; b++) {
@@ -262,30 +262,48 @@ function L(a) {
   a.F.clear();
   a.G.clear();
 }
-;function ia(a) {
-  M.call(a, "add");
-  M.call(a, "append");
-  M.call(a, "search");
-  M.call(a, "update");
-  M.call(a, "remove");
+;let M, N;
+async function ia(a) {
+  a = a.data;
+  const c = a.task, b = a.id;
+  let e = a.args;
+  switch(c) {
+    case "init":
+      N = a.options || {};
+      (a = a.factory) ? (Function("return " + a)()(self), M = new self.FlexSearch.Index(N), delete self.FlexSearch) : M = new O(N);
+      postMessage({id:b});
+      break;
+    default:
+      let d;
+      "export" === c && (e = [N.export]);
+      "import" === c ? await N.import.call(M, M) : d = M[c].apply(M, e);
+      postMessage("search" === c ? {id:b, msg:d} : {id:b});
+  }
 }
-let N, ja;
-const O = {}, P = {};
-function ka(a) {
-  N = 0;
-  O[a] = P[a];
+;function ja(a) {
+  P.call(a, "add");
+  P.call(a, "append");
+  P.call(a, "search");
+  P.call(a, "update");
+  P.call(a, "remove");
 }
-function M(a) {
+let Q, ka;
+const R = {}, S = {};
+function la(a) {
+  Q = 0;
+  R[a] = S[a];
+}
+function P(a) {
   this[a + "Async"] = function() {
     const c = arguments;
     var b = c[c.length - 1];
     let e;
     "function" === typeof b && (e = b, delete c[c.length - 1]);
-    N || (N = setTimeout(ka, 0, a), ja = Date.now());
-    P[a] || (P[a] = O[a] = 1000);
-    if (!--O[a]) {
-      O[a] = P[a] = P[a] * this.priority * this.priority * 3 / (Date.now() - ja) | 0 || 1;
-      N = clearTimeout(N);
+    Q || (Q = setTimeout(la, 0, a), ka = Date.now());
+    S[a] || (S[a] = R[a] = 1000);
+    if (!--R[a]) {
+      R[a] = S[a] = S[a] * this.priority * this.priority * 3 / (Date.now() - ka) | 0 || 1;
+      Q = clearTimeout(Q);
       const f = this;
       return new Promise(g => {
         setTimeout(function() {
@@ -299,7 +317,67 @@ function M(a) {
     return b;
   };
 }
-;function la(a, c = 0) {
+;let T = 0;
+function ma(a = {}) {
+  function c(g) {
+    function h(k) {
+      k = k.data || k;
+      const l = k.id, m = l && d.h[l];
+      m && (m(k.msg), delete d.h[l]);
+    }
+    this.worker = g;
+    this.h = C();
+    if (this.worker) {
+      e ? this.worker.on("message", h) : this.worker.onmessage = h;
+      if (a.config) {
+        return new Promise(function(k) {
+          d.h[++T] = function() {
+            k(d);
+          };
+          d.worker.postMessage({id:T, task:"init", factory:b, options:a});
+        });
+      }
+      this.worker.postMessage({task:"init", factory:b, options:a});
+      return this;
+    }
+  }
+  if (!this || this.constructor !== ma) {
+    return new ma(a);
+  }
+  let b = "undefined" !== typeof self ? self._factory : "undefined" !== typeof window ? window._factory : null;
+  b && (b = b.toString());
+  const e = "undefined" === typeof window, d = this, f = na(b, e, a.worker);
+  return f.then ? f.then(function(g) {
+    return c.call(d, g);
+  }) : c.call(this, f);
+}
+U("add");
+U("append");
+U("search");
+U("update");
+U("remove");
+U("clear");
+U("export");
+U("import");
+ja(ma.prototype);
+function U(a) {
+  ma.prototype[a] = async function() {
+    const c = this, b = [].slice.call(arguments);
+    var e = b[b.length - 1];
+    let d;
+    "function" === typeof e && (d = e, b.splice(b.length - 1, 1));
+    e = new Promise(function(f) {
+      c.h[++T] = f;
+      c.worker.postMessage({task:a, id:T, args:b});
+    });
+    return d ? (e.then(d), this) : e;
+  };
+}
+function na(a, c, b) {
+  return c ? "undefined" !== typeof module ? new (require("worker_threads")["Worker"])(__dirname + "/node/node.js") : import("worker_threads").then(function(worker){ return new worker["Worker"]((1,eval)("import.meta.dirname") + "/node/node.mjs"); }) : a ? new window.Worker(URL.createObjectURL(new Blob(["onmessage=" + ia.toString()], {type:"text/javascript"}))) : new window.Worker(D(b) ? b : (0,eval)("import.meta.url").replace("/worker.js", "/worker/worker.js").replace("flexsearch.bundle.module.min.js", 
+  "module/worker/worker.js"), {type:"module"});
+}
+;function oa(a, c = 0) {
   let b = [], e = [];
   c && (c = 250000 / c * 5000 | 0);
   for (const d of a.entries()) {
@@ -308,30 +386,30 @@ function M(a) {
   e.length && b.push(e);
   return b;
 }
-function ma(a, c) {
+function pa(a, c) {
   c || (c = new Map());
   for (let b = 0, e; b < a.length; b++) {
     e = a[b], c.set(e[0], e[1]);
   }
   return c;
 }
-function na(a, c = 0) {
+function qa(a, c = 0) {
   let b = [], e = [];
   c && (c = 250000 / c * 1000 | 0);
   for (const d of a.entries()) {
-    e.push([d[0], la(d[1])[0]]), e.length === c && (b.push(e), e = []);
+    e.push([d[0], oa(d[1])[0]]), e.length === c && (b.push(e), e = []);
   }
   e.length && b.push(e);
   return b;
 }
-function oa(a, c) {
+function ra(a, c) {
   c || (c = new Map());
   for (let b = 0, e, d; b < a.length; b++) {
-    e = a[b], d = c.get(e[0]), c.set(e[0], ma(e[1], d));
+    e = a[b], d = c.get(e[0]), c.set(e[0], pa(e[1], d));
   }
   return c;
 }
-function pa(a) {
+function sa(a) {
   let c = [], b = [];
   for (const e of a.keys()) {
     b.push(e), 250000 === b.length && (c.push(b), b = []);
@@ -339,14 +417,14 @@ function pa(a) {
   b.length && c.push(b);
   return c;
 }
-function qa(a, c) {
+function ta(a, c) {
   c || (c = new Set());
   for (let b = 0; b < a.length; b++) {
     c.add(a[b]);
   }
   return c;
 }
-function Q(a, c, b, e, d, f, g = 0) {
+function ua(a, c, b, e, d, f, g = 0) {
   const h = e && e.constructor === Array;
   var k = h ? e.shift() : e;
   if (!k) {
@@ -355,13 +433,13 @@ function Q(a, c, b, e, d, f, g = 0) {
   if ((k = a((c ? c + "." : "") + (g + 1) + "." + b, JSON.stringify(k))) && k.then) {
     const l = this;
     return k.then(function() {
-      return Q.call(l, a, c, b, h ? e : null, d, f, g + 1);
+      return ua.call(l, a, c, b, h ? e : null, d, f, g + 1);
     });
   }
-  return Q.call(this, a, c, b, h ? e : null, d, f, g + 1);
+  return ua.call(this, a, c, b, h ? e : null, d, f, g + 1);
 }
-;R.prototype.add = function(a, c, b) {
-  I(a) && (c = a, a = J(c, this.key));
+;V.prototype.add = function(a, c, b) {
+  H(a) && (c = a, a = J(c, this.key));
   if (c && (a || 0 === a)) {
     if (!b && this.reg.has(a)) {
       return this.update(a, c);
@@ -374,7 +452,7 @@ function Q(a, c, b, e, d, f, g = 0) {
         d && e.add(a, d, !1, !0);
       } else {
         if (d = k.I, !d || d(c)) {
-          k.constructor === String ? k = ["" + k] : E(k) && (k = [k]), ra(c, k, this.J, 0, e, a, k[0], b);
+          k.constructor === String ? k = ["" + k] : D(k) && (k = [k]), va(c, k, this.J, 0, e, a, k[0], b);
         }
       }
     }
@@ -396,7 +474,7 @@ function Q(a, c, b, e, d, f, g = 0) {
           f = J(c, f);
         }
         if (d && f) {
-          E(f) && (f = [f]);
+          D(f) && (f = [f]);
           for (let k = 0, l, m; k < f.length; k++) {
             l = f[k], h[l] || (h[l] = 1, (g = d.get(l)) ? m = g : d.set(l, m = []), b && m.includes(a) || (m.push(a), this.fastupdate && ((g = this.reg.get(a)) ? g.push(m) : this.reg.set(a, [m]))));
           }
@@ -421,11 +499,11 @@ function Q(a, c, b, e, d, f, g = 0) {
               continue;
             }
             l = [l.U];
-          } else if (E(l) || l.constructor === String) {
+          } else if (D(l) || l.constructor === String) {
             h[l] = c[l];
             continue;
           }
-          sa(c, h, l, 0, l[0], m);
+          wa(c, h, l, 0, l[0], m);
         }
       }
       this.store.set(a, h || c);
@@ -433,21 +511,21 @@ function Q(a, c, b, e, d, f, g = 0) {
   }
   return this;
 };
-function sa(a, c, b, e, d, f) {
+function wa(a, c, b, e, d, f) {
   a = a[d];
   if (e === b.length - 1) {
     c[d] = f || a;
   } else if (a) {
     if (a.constructor === Array) {
       for (c = c[d] = Array(a.length), d = 0; d < a.length; d++) {
-        sa(a, c, b, e, d);
+        wa(a, c, b, e, d);
       }
     } else {
-      c = c[d] || (c[d] = C()), d = b[++e], sa(a, c, b, e, d);
+      c = c[d] || (c[d] = C()), d = b[++e], wa(a, c, b, e, d);
     }
   }
 }
-function ra(a, c, b, e, d, f, g, h) {
+function va(a, c, b, e, d, f, g, h) {
   if (a = a[g]) {
     if (e === c.length - 1) {
       if (a.constructor === Array) {
@@ -463,15 +541,15 @@ function ra(a, c, b, e, d, f, g, h) {
     } else {
       if (a.constructor === Array) {
         for (g = 0; g < a.length; g++) {
-          ra(a, c, b, e, d, f, g, h);
+          va(a, c, b, e, d, f, g, h);
         }
       } else {
-        g = c[++e], ra(a, c, b, e, d, f, g, h);
+        g = c[++e], va(a, c, b, e, d, f, g, h);
       }
     }
   }
 }
-;function ta(a, c, b, e, d) {
+;function xa(a, c, b, e, d) {
   const f = a.length;
   let g = [], h, k;
   h = C();
@@ -486,7 +564,7 @@ function ra(a, c, b, e, d, f, g, h) {
   }
   if (a = g.length) {
     if (d) {
-      g = 1 < g.length ? ua(g, b, e) : (g = g[0]).length > b || e ? g.slice(e, b + e) : g;
+      g = 1 < g.length ? ya(g, b, e) : (g = g[0]).length > b || e ? g.slice(e, b + e) : g;
     } else {
       if (a < f) {
         return [];
@@ -501,7 +579,7 @@ function ra(a, c, b, e, d, f, g, h) {
   }
   return g;
 }
-function ua(a, c, b) {
+function ya(a, c, b) {
   const e = [], d = C();
   let f;
   var g = a.length;
@@ -523,7 +601,7 @@ function ua(a, c, b) {
   }
   return e;
 }
-function va(a, c, b) {
+function za(a, c, b) {
   const e = C(), d = [];
   for (let f = 0, g; f < c.length; f++) {
     g = c[f];
@@ -544,12 +622,12 @@ function va(a, c, b) {
   }
   return d;
 }
-;function wa(a, c, b, e) {
+;function Aa(a, c, b, e) {
   if (!a.length) {
     return a;
   }
   if (1 === a.length) {
-    return a = a[0], a = b || a.length > c ? c ? a.slice(b, b + c) : a.slice(b) : a, e ? S.call(this, a) : a;
+    return a = a[0], a = b || a.length > c ? c ? a.slice(b, b + c) : a.slice(b) : a, e ? W.call(this, a) : a;
   }
   let d = [];
   for (let f = 0, g, h; f < a.length; f++) {
@@ -563,7 +641,7 @@ function va(a, c, b) {
       }
       h > c && (g = g.slice(0, c), h = c);
       if (!d.length && h >= c) {
-        return e ? S.call(this, g) : g;
+        return e ? W.call(this, g) : g;
       }
       d.push(g);
       c -= h;
@@ -573,9 +651,9 @@ function va(a, c, b) {
     }
   }
   d = 1 < d.length ? [].concat.apply([], d) : d[0];
-  return e ? S.call(this, d) : d;
+  return e ? W.call(this, d) : d;
 }
-;function T(a, c, b) {
+;function Ba(a, c, b) {
   var e = b[0];
   if (e.then) {
     return Promise.all(b).then(function(m) {
@@ -590,7 +668,7 @@ function va(a, c, b) {
   for (let m = 0, n; m < b.length; m++) {
     if (n = b[m]) {
       let t;
-      if (n.constructor === U) {
+      if (n.constructor === X) {
         t = n.result;
       } else if (n.constructor === Array) {
         t = n;
@@ -621,11 +699,11 @@ function va(a, c, b) {
   }
   return {O:e, P:d, limit:f, offset:g, enrich:h, resolve:k, suggest:l};
 }
-;U.prototype.or = function() {
-  const {O:a, P:c, limit:b, offset:e, enrich:d, resolve:f} = T(this, "or", arguments);
-  return xa.call(this, a, c, b, e, d, f);
+;X.prototype.or = function() {
+  const {O:a, P:c, limit:b, offset:e, enrich:d, resolve:f} = Ba(this, "or", arguments);
+  return Ca.call(this, a, c, b, e, d, f);
 };
-function xa(a, c, b, e, d, f) {
+function Ca(a, c, b, e, d, f) {
   if (c.length) {
     const g = this;
     return Promise.all(c).then(function(h) {
@@ -633,25 +711,25 @@ function xa(a, c, b, e, d, f) {
       for (let k = 0, l; k < h.length; k++) {
         (l = h[k]).length && (a[k] = l);
       }
-      return xa.call(g, a, [], b, e, d, f);
+      return Ca.call(g, a, [], b, e, d, f);
     });
   }
-  a.length && (this.result.length && a.push(this.result), 2 > a.length ? this.result = a[0] : (this.result = ua(a, b, e), e = 0));
+  a.length && (this.result.length && a.push(this.result), 2 > a.length ? this.result = a[0] : (this.result = ya(a, b, e), e = 0));
   return f ? this.resolve(b, e, d) : this;
 }
-;U.prototype.and = function() {
+;X.prototype.and = function() {
   let a = this.result.length, c, b, e, d;
   if (!a) {
     const f = arguments[0];
     f && (a = !!f.suggest, d = f.resolve, c = f.limit, b = f.offset, e = f.enrich && d);
   }
   if (a) {
-    const {O:f, P:g, limit:h, offset:k, enrich:l, resolve:m, suggest:n} = T(this, "and", arguments);
-    return ya.call(this, f, g, h, k, l, m, n);
+    const {O:f, P:g, limit:h, offset:k, enrich:l, resolve:m, suggest:n} = Ba(this, "and", arguments);
+    return Da.call(this, f, g, h, k, l, m, n);
   }
   return d ? this.resolve(c, b, e) : this;
 };
-function ya(a, c, b, e, d, f, g) {
+function Da(a, c, b, e, d, f, g) {
   if (c.length) {
     const h = this;
     return Promise.all(c).then(function(k) {
@@ -659,7 +737,7 @@ function ya(a, c, b, e, d, f, g) {
       for (let l = 0, m; l < k.length; l++) {
         (m = k[l]).length && (a[l] = m);
       }
-      return ya.call(h, a, [], b, e, d, f, g);
+      return Da.call(h, a, [], b, e, d, f, g);
     });
   }
   if (a.length) {
@@ -667,7 +745,7 @@ function ya(a, c, b, e, d, f, g) {
       this.result = a[0];
     } else {
       if (c = aa(a)) {
-        return this.result = ta(a, c, b, e, g), f ? d ? S.call(this.index, this.result) : this.result : this;
+        return this.result = xa(a, c, b, e, g), f ? d ? W.call(this.index, this.result) : this.result : this;
       }
       this.result = [];
     }
@@ -676,11 +754,11 @@ function ya(a, c, b, e, d, f, g) {
   }
   return f ? this.resolve(b, e, d) : this;
 }
-;U.prototype.xor = function() {
-  const {O:a, P:c, limit:b, offset:e, enrich:d, resolve:f, suggest:g} = T(this, "xor", arguments);
-  return za.call(this, a, c, b, e, d, f, g);
+;X.prototype.xor = function() {
+  const {O:a, P:c, limit:b, offset:e, enrich:d, resolve:f, suggest:g} = Ba(this, "xor", arguments);
+  return Ea.call(this, a, c, b, e, d, f, g);
 };
-function za(a, c, b, e, d, f, g) {
+function Ea(a, c, b, e, d, f, g) {
   if (c.length) {
     const h = this;
     return Promise.all(c).then(function(k) {
@@ -688,21 +766,21 @@ function za(a, c, b, e, d, f, g) {
       for (let l = 0, m; l < k.length; l++) {
         (m = k[l]).length && (a[l] = m);
       }
-      return za.call(h, a, [], b, e, d, f, g);
+      return Ea.call(h, a, [], b, e, d, f, g);
     });
   }
   if (a.length) {
     if (this.result.length && a.unshift(this.result), 2 > a.length) {
       this.result = a[0];
     } else {
-      return this.result = Aa.call(this, a, b, e, f, this.h), f ? d ? S.call(this.index, this.result) : this.result : this;
+      return this.result = Fa.call(this, a, b, e, f, this.h), f ? d ? W.call(this.index, this.result) : this.result : this;
     }
   } else {
     g || (this.result = a);
   }
   return f ? this.resolve(b, e, d) : this;
 }
-function Aa(a, c, b, e, d) {
+function Fa(a, c, b, e, d) {
   const f = [], g = C();
   let h = 0;
   for (let k = 0, l; k < a.length; k++) {
@@ -747,11 +825,11 @@ function Aa(a, c, b, e, d) {
   }
   return f;
 }
-;U.prototype.not = function() {
-  const {O:a, P:c, limit:b, offset:e, enrich:d, resolve:f, suggest:g} = T(this, "not", arguments);
-  return Ba.call(this, a, c, b, e, d, f, g);
+;X.prototype.not = function() {
+  const {O:a, P:c, limit:b, offset:e, enrich:d, resolve:f, suggest:g} = Ba(this, "not", arguments);
+  return Ga.call(this, a, c, b, e, d, f, g);
 };
-function Ba(a, c, b, e, d, f, g) {
+function Ga(a, c, b, e, d, f, g) {
   if (c.length) {
     const h = this;
     return Promise.all(c).then(function(k) {
@@ -759,17 +837,17 @@ function Ba(a, c, b, e, d, f, g) {
       for (let l = 0, m; l < k.length; l++) {
         (m = k[l]).length && (a[l] = m);
       }
-      return Ba.call(h, a, [], b, e, d, f, g);
+      return Ga.call(h, a, [], b, e, d, f, g);
     });
   }
   if (a.length && this.result.length) {
-    this.result = Ca.call(this, a, b, e, f);
+    this.result = Ha.call(this, a, b, e, f);
   } else if (f) {
     return this.resolve(b, e, d);
   }
-  return f ? d ? S.call(this.index, this.result) : this.result : this;
+  return f ? d ? W.call(this.index, this.result) : this.result : this;
 }
-function Ca(a, c, b, e) {
+function Ha(a, c, b, e) {
   const d = [];
   a = new Set(a.flat().flat());
   for (let f = 0, g, h = 0; f < this.result.length; f++) {
@@ -795,9 +873,9 @@ function Ca(a, c, b, e) {
   }
   return d;
 }
-;function U(a) {
-  if (!this || this.constructor !== U) {
-    return new U(a);
+;function X(a) {
+  if (!this || this.constructor !== X) {
+    return new X(a);
   }
   if (a && a.index) {
     return a.resolve = !1, this.index = a.index, this.h = a.boost || 0, this.result = a.index.search(a).result, this;
@@ -806,7 +884,7 @@ function Ca(a, c, b, e) {
   this.result = a || [];
   this.h = 0;
 }
-U.prototype.limit = function(a) {
+X.prototype.limit = function(a) {
   if (this.result.length) {
     const c = [];
     for (let b = 0, e; b < this.result.length; b++) {
@@ -825,7 +903,7 @@ U.prototype.limit = function(a) {
   }
   return this;
 };
-U.prototype.offset = function(a) {
+X.prototype.offset = function(a) {
   if (this.result.length) {
     const c = [];
     for (let b = 0, e; b < this.result.length; b++) {
@@ -837,18 +915,18 @@ U.prototype.offset = function(a) {
   }
   return this;
 };
-U.prototype.boost = function(a) {
+X.prototype.boost = function(a) {
   this.h += a;
   return this;
 };
-U.prototype.resolve = function(a, c, b) {
+X.prototype.resolve = function(a, c, b) {
   const e = this.result, d = this.index;
   this.result = this.index = null;
-  return e.length ? ("object" === typeof a && (b = a.enrich, c = a.offset, a = a.limit), wa.call(d, e, a || 100, c, b)) : e;
+  return e.length ? ("object" === typeof a && (b = a.enrich, c = a.offset, a = a.limit), Aa.call(d, e, a || 100, c, b)) : e;
 };
 C();
-R.prototype.search = function(a, c, b, e) {
-  b || (!c && I(a) ? (b = a, a = "") : I(c) && (b = c, c = 0));
+V.prototype.search = function(a, c, b, e) {
+  b || (!c && H(a) ? (b = a, a = "") : H(c) && (b = c, c = 0));
   let d = [];
   var f = [];
   let g, h, k, l, m, n, t = 0, p, q;
@@ -872,7 +950,7 @@ R.prototype.search = function(a, c, b, e) {
       var u = [];
       for (let x = 0, r; x < m.length; x++) {
         r = m[x];
-        if (E(r)) {
+        if (D(r)) {
           throw Error("A tag option can't be a string, instead it needs a { field: tag } format.");
         }
         if (r.field && r.tag) {
@@ -886,8 +964,8 @@ R.prototype.search = function(a, c, b, e) {
           }
         } else {
           v = Object.keys(r);
-          for (let D = 0, F, B; D < v.length; D++) {
-            if (F = v[D], B = r[F], B.constructor === Array) {
+          for (let E = 0, F, B; E < v.length; E++) {
+            if (F = v[E], B = r[F], B.constructor === Array) {
               for (z = 0; z < B.length; z++) {
                 u.push(F, B[z]);
               }
@@ -905,7 +983,7 @@ R.prototype.search = function(a, c, b, e) {
         e = [];
         if (u.length) {
           for (f = 0; f < u.length; f += 2) {
-            y = Da.call(this, u[f], u[f + 1], c, n, g), d.push({field:u[f], tag:u[f + 1], result:y});
+            y = Ia.call(this, u[f], u[f + 1], c, n, g), d.push({field:u[f], tag:u[f + 1], result:y});
           }
         }
         return e.length ? Promise.all(e).then(function(x) {
@@ -920,14 +998,14 @@ R.prototype.search = function(a, c, b, e) {
   }
   l || (l = this.field);
   u = !e && (this.worker || this.db) && [];
-  for (let x = 0, r, D, F; x < l.length; x++) {
-    D = l[x];
+  for (let x = 0, r, E, F; x < l.length; x++) {
+    E = l[x];
     let B;
-    E(D) || (B = D, D = B.field, a = B.query || a, c = B.limit || c, n = B.offset || n, k = B.suggest || k, g = this.store && (B.enrich || g));
+    D(E) || (B = E, E = B.field, a = B.query || a, c = B.limit || c, n = B.offset || n, k = B.suggest || k, g = this.store && (B.enrich || g));
     if (e) {
       r = e[x];
     } else {
-      if (v = B || b, z = this.index.get(D), m && (v.enrich = !1), u) {
+      if (v = B || b, z = this.index.get(E), m && (v.enrich = !1), u) {
         u[x] = z.search(a, c, v);
         v && g && (v.enrich = g);
         continue;
@@ -939,34 +1017,34 @@ R.prototype.search = function(a, c, b, e) {
     if (m && F) {
       v = [];
       z = 0;
-      for (let G = 0, H, Ta; G < m.length; G += 2) {
-        H = this.tag.get(m[G]);
-        if (!H) {
+      for (let G = 0, I, $a; G < m.length; G += 2) {
+        I = this.tag.get(m[G]);
+        if (!I) {
           if (console.warn("Tag '" + m[G] + ":" + m[G + 1] + "' will be skipped because there is no field '" + m[G] + "'."), k) {
             continue;
           } else {
-            return p ? d : new U(d);
+            return p ? d : new X(d);
           }
         }
-        if (Ta = (H = H && H.get(m[G + 1])) && H.length) {
-          z++, v.push(H);
+        if ($a = (I = I && I.get(m[G + 1])) && I.length) {
+          z++, v.push(I);
         } else if (!k) {
-          return p ? d : new U(d);
+          return p ? d : new X(d);
         }
       }
       if (z) {
-        r = va(r, v, p);
+        r = za(r, v, p);
         F = r.length;
         if (!F && !k) {
-          return p ? r : new U(r);
+          return p ? r : new X(r);
         }
         z--;
       }
     }
     if (F) {
-      f[t] = D, d.push(r), t++;
+      f[t] = E, d.push(r), t++;
     } else if (1 === l.length) {
-      return p ? d : new U(d);
+      return p ? d : new X(d);
     }
   }
   if (u) {
@@ -976,7 +1054,7 @@ R.prototype.search = function(a, c, b, e) {
     });
   }
   if (!t) {
-    return p ? d : new U(d);
+    return p ? d : new X(d);
   }
   if (y && (!g || !this.store)) {
     return d[0];
@@ -984,15 +1062,15 @@ R.prototype.search = function(a, c, b, e) {
   u = [];
   for (let x = 0, r; x < f.length; x++) {
     r = d[x];
-    g && r.length && !r[0].doc && (r = S.call(this, r));
+    g && r.length && !r[0].doc && (r = W.call(this, r));
     if (y) {
-      return p ? r : new U(r);
+      return p ? r : new X(r);
     }
     d[x] = {field:f[x], result:r};
   }
-  return h ? Ea(d, c) : q ? Fa(d, a, this.index, this.field, this.C, q) : d;
+  return h ? Ja(d, c) : q ? Ka(d, a, this.index, this.field, this.C, q) : d;
 };
-function Fa(a, c, b, e, d, f) {
+function Ka(a, c, b, e, d, f) {
   let g, h, k;
   for (let m = 0, n, t, p, q, y; m < a.length; m++) {
     n = a[m].result;
@@ -1007,21 +1085,21 @@ function Fa(a, c, b, e, d, f) {
       var l = J(n[u].doc, y);
       let z = g.encode(l);
       l = l.split(g.split);
-      for (let x = 0, r, D; x < z.length; x++) {
+      for (let x = 0, r, E; x < z.length; x++) {
         r = z[x];
-        D = l[x];
+        E = l[x];
         let F;
         for (let B = 0, G; B < h.length; B++) {
           if (G = h[B], "strict" === k) {
             if (r === G) {
-              v += (v ? " " : "") + f.replace("$1", D);
+              v += (v ? " " : "") + f.replace("$1", E);
               F = !0;
               break;
             }
           } else {
-            const H = r.indexOf(G);
-            if (-1 < H) {
-              v += (v ? " " : "") + D.substring(0, H) + f.replace("$1", D.substring(H, G.length)) + D.substring(H + G.length);
+            const I = r.indexOf(G);
+            if (-1 < I) {
+              v += (v ? " " : "") + E.substring(0, I) + f.replace("$1", E.substring(I, G.length)) + E.substring(I + G.length);
               F = !0;
               break;
             }
@@ -1034,7 +1112,7 @@ function Fa(a, c, b, e, d, f) {
   }
   return a;
 }
-function Ea(a, c) {
+function Ja(a, c) {
   const b = [], e = C();
   for (let d = 0, f, g; d < a.length; d++) {
     f = a[d];
@@ -1053,7 +1131,7 @@ function Ea(a, c) {
   }
   return b;
 }
-function Da(a, c, b, e, d) {
+function Ia(a, c, b, e, d) {
   let f = this.tag.get(a);
   if (!f) {
     return console.warn("Tag '" + a + "' was not found"), [];
@@ -1062,11 +1140,11 @@ function Da(a, c, b, e, d) {
     if (a > b || e) {
       f = f.slice(e, e + b);
     }
-    d && (f = S.call(this, f));
+    d && (f = W.call(this, f));
     return f;
   }
 }
-function S(a) {
+function W(a) {
   if (!this || !this.store) {
     return a;
   }
@@ -1076,32 +1154,32 @@ function S(a) {
   }
   return c;
 }
-;function R(a) {
-  if (!this || this.constructor !== R) {
-    return new R(a);
+;function V(a) {
+  if (!this || this.constructor !== V) {
+    return new V(a);
   }
   const c = a.document || a.doc || a;
   var b;
   this.C = [];
   this.field = [];
   this.J = [];
-  this.key = (b = c.key || c.id) && V(b, this.J) || "id";
+  this.key = (b = c.key || c.id) && La(b, this.J) || "id";
   this.reg = (this.fastupdate = !!a.fastupdate) ? new Map() : new Set();
   this.A = (b = c.store || null) && b && !0 !== b && [];
   this.store = b && new Map();
-  this.cache = (b = a.cache || null) && new W(b);
+  this.cache = (b = a.cache || null) && new Y(b);
   a.cache = !1;
   b = new Map();
   let e = c.index || c.field || c;
-  E(e) && (e = [e]);
+  D(e) && (e = [e]);
   for (let d = 0, f, g; d < e.length; d++) {
-    f = e[d], E(f) || (g = f, f = f.field), g = I(g) ? Object.assign({}, a, g) : a, b.set(f, new X(g, this.reg)), g.custom ? this.C[d] = g.custom : (this.C[d] = V(f, this.J), g.filter && ("string" === typeof this.C[d] && (this.C[d] = new String(this.C[d])), this.C[d].I = g.filter)), this.field[d] = f;
+    f = e[d], D(f) || (g = f, f = f.field), g = H(g) ? Object.assign({}, a, g) : a, b.set(f, new O(g, this.reg)), g.custom ? this.C[d] = g.custom : (this.C[d] = La(f, this.J), g.filter && ("string" === typeof this.C[d] && (this.C[d] = new String(this.C[d])), this.C[d].I = g.filter)), this.field[d] = f;
   }
   if (this.A) {
     a = c.store;
-    E(a) && (a = [a]);
+    D(a) && (a = [a]);
     for (let d = 0, f, g; d < a.length; d++) {
-      f = a[d], g = f.field || f, f.custom ? (this.A[d] = f.custom, f.custom.U = g) : (this.A[d] = V(g, this.J), f.filter && ("string" === typeof this.A[d] && (this.A[d] = new String(this.A[d])), this.A[d].I = f.filter));
+      f = a[d], g = f.field || f, f.custom ? (this.A[d] = f.custom, f.custom.U = g) : (this.A[d] = La(g, this.J), f.filter && ("string" === typeof this.A[d] && (this.A[d] = new String(this.A[d])), this.A[d].I = f.filter));
     }
   }
   this.index = b;
@@ -1117,14 +1195,14 @@ function S(a) {
         if (!g) {
           throw Error("The tag field from the document descriptor is undefined.");
         }
-        f.custom ? this.B[d] = f.custom : (this.B[d] = V(g, this.J), f.filter && ("string" === typeof this.B[d] && (this.B[d] = new String(this.B[d])), this.B[d].I = f.filter));
+        f.custom ? this.B[d] = f.custom : (this.B[d] = La(g, this.J), f.filter && ("string" === typeof this.B[d] && (this.B[d] = new String(this.B[d])), this.B[d].I = f.filter));
         this.T[d] = g;
         this.tag.set(g, new Map());
       }
     }
   }
 }
-function V(a, c) {
+function La(a, c) {
   const b = a.split(":");
   let e = 0;
   for (let d = 0; d < b.length; d++) {
@@ -1133,7 +1211,7 @@ function V(a, c) {
   e < b.length && (b.length = e);
   return 1 < e ? b : b[0];
 }
-w = R.prototype;
+w = V.prototype;
 w.append = function(a, c) {
   return this.add(a, c, !0);
 };
@@ -1141,7 +1219,7 @@ w.update = function(a, c) {
   return this.remove(a).add(a, c);
 };
 w.remove = function(a) {
-  I(a) && (a = J(a, this.key));
+  H(a) && (a = J(a, this.key));
   for (var c of this.index.values()) {
     c.remove(a, !0);
   }
@@ -1189,7 +1267,7 @@ w.set = function(a, c) {
   this.store.set(a, c);
   return this;
 };
-w.searchCache = Ga;
+w.searchCache = Ma;
 w.export = function(a, c, b = 0, e = 0) {
   if (b < this.field.length) {
     const g = this.field[b];
@@ -1205,17 +1283,17 @@ w.export = function(a, c, b = 0, e = 0) {
   switch(e) {
     case 0:
       d = "reg";
-      f = pa(this.reg);
+      f = sa(this.reg);
       c = null;
       break;
     case 1:
       d = "tag";
-      f = na(this.tag, this.reg.size);
+      f = qa(this.tag, this.reg.size);
       c = null;
       break;
     case 2:
       d = "doc";
-      f = la(this.store);
+      f = oa(this.store);
       c = null;
       break;
     case 3:
@@ -1225,7 +1303,7 @@ w.export = function(a, c, b = 0, e = 0) {
     default:
       return;
   }
-  return Q.call(this, a, c, d, f, b, e);
+  return ua.call(this, a, c, d, f, b, e);
 };
 w.import = function(a, c) {
   if (c) {
@@ -1240,23 +1318,23 @@ w.import = function(a, c) {
     switch(a) {
       case "reg":
         this.fastupdate = !1;
-        this.reg = qa(c, this.reg);
+        this.reg = ta(c, this.reg);
         for (let e = 0, d; e < this.field.length; e++) {
           d = this.index.get(this.field[e]), d.fastupdate = !1, d.reg = this.reg;
         }
         break;
       case "tag":
-        this.tag = oa(c, this.tag);
+        this.tag = ra(c, this.tag);
         break;
       case "doc":
-        this.store = ma(c, this.store);
+        this.store = pa(c, this.store);
     }
   }
 };
-ia(R.prototype);
-function Ga(a, c, b) {
+ja(V.prototype);
+function Ma(a, c, b) {
   a = ("object" === typeof a ? "" + a.query : a).toLowerCase();
-  this.cache || (this.cache = new W());
+  this.cache || (this.cache = new Y());
   let e = this.cache.get(a);
   if (!e) {
     e = this.search(a, c, b);
@@ -1271,56 +1349,56 @@ function Ga(a, c, b) {
   }
   return e;
 }
-function W(a) {
+function Y(a) {
   this.limit = a && !0 !== a ? a : 1000;
   this.cache = new Map();
   this.h = "";
 }
-W.prototype.set = function(a, c) {
+Y.prototype.set = function(a, c) {
   this.cache.set(this.h = a, c);
   this.cache.size > this.limit && this.cache.delete(this.cache.keys().next().value);
 };
-W.prototype.get = function(a) {
+Y.prototype.get = function(a) {
   const c = this.cache.get(a);
   c && this.h !== a && (this.cache.delete(a), this.cache.set(this.h = a, c));
   return c;
 };
-W.prototype.remove = function(a) {
+Y.prototype.remove = function(a) {
   for (const c of this.cache) {
     const b = c[0];
     c[1].includes(a) && this.cache.delete(b);
   }
 };
-W.prototype.clear = function() {
+Y.prototype.clear = function() {
   this.cache.clear();
   this.h = "";
 };
-const Ha = {normalize:function(a) {
+const Na = {normalize:function(a) {
   return a.toLowerCase();
 }};
-const Ia = new Map([["b", "p"], ["v", "f"], ["w", "f"], ["z", "s"], ["x", "s"], ["d", "t"], ["n", "m"], ["c", "k"], ["g", "k"], ["j", "k"], ["q", "k"], ["i", "e"], ["y", "e"], ["u", "o"]]);
-const Ja = new Map([["ae", "a"], ["oe", "o"], ["sh", "s"], ["kh", "k"], ["th", "t"], ["pf", "f"]]), Ka = [/([^aeo])h(.)/g, "$1$2", /([aeo])h([^aeo]|$)/g, "$1$2", /([^0-9])\1+/g, "$1"];
-const La = {a:"", e:"", i:"", o:"", u:"", y:"", b:1, f:1, p:1, v:1, c:2, g:2, j:2, k:2, q:2, s:2, x:2, z:2, "\u00df":2, d:3, t:3, l:4, m:5, n:5, r:6};
-const Ma = /[\x00-\x7F]+/g;
-const Na = /[\x00-\x7F]+/g;
-const Oa = /[\x00-\x7F]+/g;
-var Pa = {LatinExact:{normalize:!1, dedupe:!1}, LatinDefault:Ha, LatinSimple:{normalize:!0, dedupe:!0}, LatinBalance:{normalize:!0, dedupe:!0, mapper:Ia}, LatinAdvanced:{normalize:!0, dedupe:!0, mapper:Ia, matcher:Ja, replacer:Ka}, LatinExtra:{normalize:!0, dedupe:!0, mapper:Ia, replacer:Ka.concat([/(?!^)[aeo]/g, ""]), matcher:Ja}, LatinSoundex:{normalize:!0, dedupe:!1, include:{letter:!0}, finalize:function(a) {
+const Oa = new Map([["b", "p"], ["v", "f"], ["w", "f"], ["z", "s"], ["x", "s"], ["d", "t"], ["n", "m"], ["c", "k"], ["g", "k"], ["j", "k"], ["q", "k"], ["i", "e"], ["y", "e"], ["u", "o"]]);
+const Pa = new Map([["ae", "a"], ["oe", "o"], ["sh", "s"], ["kh", "k"], ["th", "t"], ["pf", "f"]]), Qa = [/([^aeo])h(.)/g, "$1$2", /([aeo])h([^aeo]|$)/g, "$1$2", /([^0-9])\1+/g, "$1"];
+const Ra = {a:"", e:"", i:"", o:"", u:"", y:"", b:1, f:1, p:1, v:1, c:2, g:2, j:2, k:2, q:2, s:2, x:2, z:2, "\u00df":2, d:3, t:3, l:4, m:5, n:5, r:6};
+const Sa = /[\x00-\x7F]+/g;
+const Ta = /[\x00-\x7F]+/g;
+const Ua = /[\x00-\x7F]+/g;
+var Va = {LatinExact:{normalize:!1, dedupe:!1}, LatinDefault:Na, LatinSimple:{normalize:!0, dedupe:!0}, LatinBalance:{normalize:!0, dedupe:!0, mapper:Oa}, LatinAdvanced:{normalize:!0, dedupe:!0, mapper:Oa, matcher:Pa, replacer:Qa}, LatinExtra:{normalize:!0, dedupe:!0, mapper:Oa, replacer:Qa.concat([/(?!^)[aeo]/g, ""]), matcher:Pa}, LatinSoundex:{normalize:!0, dedupe:!1, include:{letter:!0}, finalize:function(a) {
   for (let b = 0; b < a.length; b++) {
     var c = a[b];
-    let e = c.charAt(0), d = La[e];
-    for (let f = 1, g; f < c.length && (g = c.charAt(f), "h" === g || "w" === g || !(g = La[g]) || g === d || (e += g, d = g, 4 !== e.length)); f++) {
+    let e = c.charAt(0), d = Ra[e];
+    for (let f = 1, g; f < c.length && (g = c.charAt(f), "h" === g || "w" === g || !(g = Ra[g]) || g === d || (e += g, d = g, 4 !== e.length)); f++) {
     }
     a[b] = e;
   }
 }}, ArabicDefault:{rtl:!0, normalize:!1, dedupe:!0, prepare:function(a) {
-  return ("" + a).replace(Ma, " ");
+  return ("" + a).replace(Sa, " ");
 }}, CjkDefault:{normalize:!1, dedupe:!0, split:"", prepare:function(a) {
-  return ("" + a).replace(Na, "");
+  return ("" + a).replace(Ta, "");
 }}, CyrillicDefault:{normalize:!1, dedupe:!0, prepare:function(a) {
-  return ("" + a).replace(Oa, " ");
+  return ("" + a).replace(Ua, " ");
 }}};
-const Qa = {memory:{resolution:1}, performance:{resolution:6, fastupdate:!0, context:{depth:1, resolution:3}}, match:{tokenize:"forward"}, score:{resolution:9, context:{depth:2, resolution:9}}};
-X.prototype.add = function(a, c, b, e) {
+const Wa = {memory:{resolution:1}, performance:{resolution:6, fastupdate:!0, context:{depth:1, resolution:3}}, match:{tokenize:"forward"}, score:{resolution:9, context:{depth:2, resolution:9}}};
+O.prototype.add = function(a, c, b, e) {
   if (c && (a || 0 === a)) {
     if (!e && !b && this.reg.has(a)) {
       return this.update(a, c);
@@ -1332,14 +1410,14 @@ X.prototype.add = function(a, c, b, e) {
         let q = c[this.rtl ? e - 1 - p : p];
         var d = q.length;
         if (d && (n || !m[q])) {
-          var f = this.score ? this.score(c, q, p, null, 0) : Y(t, e, p), g = "";
+          var f = this.score ? this.score(c, q, p, null, 0) : Xa(t, e, p), g = "";
           switch(this.tokenize) {
             case "full":
               if (2 < d) {
                 for (f = 0; f < d; f++) {
                   for (var h = d; h > f; h--) {
                     g = q.substring(f, h);
-                    var k = this.score ? this.score(c, q, p, g, f) : Y(t, e, p, d, f);
+                    var k = this.score ? this.score(c, q, p, g, f) : Xa(t, e, p, d, f);
                     Z(this, m, g, k, a, b);
                   }
                 }
@@ -1348,7 +1426,7 @@ X.prototype.add = function(a, c, b, e) {
             case "reverse":
               if (1 < d) {
                 for (h = d - 1; 0 < h; h--) {
-                  g = q[h] + g, k = this.score ? this.score(c, q, p, g, h) : Y(t, e, p, d, h), Z(this, m, g, k, a, b);
+                  g = q[h] + g, k = this.score ? this.score(c, q, p, g, h) : Xa(t, e, p, d, h), Z(this, m, g, k, a, b);
                 }
                 g = "";
               }
@@ -1364,7 +1442,7 @@ X.prototype.add = function(a, c, b, e) {
                 for (d = C(), g = this.S, f = q, h = Math.min(n + 1, e - p), d[f] = 1, k = 1; k < h; k++) {
                   if ((q = c[this.rtl ? e - 1 - p - k : p + k]) && !d[q]) {
                     d[q] = 1;
-                    const y = this.score ? this.score(c, f, p, q, k) : Y(g + (e / 2 > g ? 0 : 1), e, p, h - 1, k - 1), u = this.bidirectional && q > f;
+                    const y = this.score ? this.score(c, f, p, q, k) : Xa(g + (e / 2 > g ? 0 : 1), e, p, h - 1, k - 1), u = this.bidirectional && q > f;
                     Z(this, l, u ? f : q, y, a, b, u ? q : f);
                   }
                 }
@@ -1383,11 +1461,11 @@ function Z(a, c, b, e, d, f, g) {
     g ? (c = k || (c[b] = C()), c[g] = 1, (k = h.get(g)) ? h = k : h.set(g, h = new Map())) : c[b] = 1, (k = h.get(b)) ? h = k : h.set(b, h = []), h = h[e] || (h[e] = []), f && h.includes(d) || (h.push(d), a.fastupdate && ((c = a.reg.get(d)) ? c.push(h) : a.reg.set(d, [h])));
   }
 }
-function Y(a, c, b, e, d) {
+function Xa(a, c, b, e, d) {
   return b && 1 < a ? c + (e || 0) <= a ? b + (d || 0) : (a - 1) / (c + (e || 0)) * (b + (d || 0)) + 1 | 0 : 0;
 }
-;X.prototype.search = function(a, c, b) {
-  b || (!c && I(a) ? (b = a, a = "") : I(c) && (b = c, c = 0));
+;O.prototype.search = function(a, c, b) {
+  b || (!c && H(a) ? (b = a, a = "") : H(c) && (b = c, c = 0));
   var e = [], d = 0;
   if (b) {
     a = b.query || a;
@@ -1404,11 +1482,11 @@ function Y(a, c, b, e, d) {
   a = b.length;
   c = c || (h ? 100 : 0);
   if (1 === a) {
-    return Ra.call(this, b[0], "", c, d, h);
+    return Ya.call(this, b[0], "", c, d, h);
   }
   f = this.depth && !1 !== f;
   if (2 === a && f && !g) {
-    return Ra.call(this, b[0], b[1], c, d, h);
+    return Ya.call(this, b[0], b[1], c, d, h);
   }
   h = C();
   let l = 0;
@@ -1420,7 +1498,7 @@ function Y(a, c, b, e, d) {
   for (let q, y; l < a; l++) {
     if ((y = b[l]) && !h[y]) {
       h[y] = 1;
-      q = Sa(this, y, m);
+      q = Za(this, y, m);
       a: {
         f = q;
         var n = e, t = g, p = k;
@@ -1456,27 +1534,27 @@ function Y(a, c, b, e, d) {
     m = e.length;
     a = e;
     if (1 < m) {
-      a = ta(e, k, c, d, g);
+      a = xa(e, k, c, d, g);
     } else if (1 === m) {
-      g = wa.call(null, e[0], c, d);
+      g = Aa.call(null, e[0], c, d);
       break a;
     }
     g = a;
   }
   return g;
 };
-function Ra(a, c, b, e, d) {
-  a = Sa(this, a, c);
+function Ya(a, c, b, e, d) {
+  a = Za(this, a, c);
   d = !0;
-  return a && a.length ? d ? wa.call(this, a, b, e) : new U(a) : d ? [] : new U();
+  return a && a.length ? d ? Aa.call(this, a, b, e) : new X(a) : d ? [] : new X();
 }
-function Sa(a, c, b) {
+function Za(a, c, b) {
   let e;
   b && (e = a.bidirectional && c > b) && (e = b, b = c, c = e);
   a = b ? (a = a.ctx.get(b)) && a.get(c) : a.map.get(c);
   return a;
 }
-;X.prototype.remove = function(a, c) {
+;O.prototype.remove = function(a, c) {
   const b = this.reg.size && (this.fastupdate ? this.reg.get(a) : this.reg.has(a));
   if (b) {
     if (this.fastupdate) {
@@ -1491,14 +1569,14 @@ function Sa(a, c, b) {
         }
       }
     } else {
-      Ua(this.map, a), this.depth && Ua(this.ctx, a);
+      ab(this.map, a), this.depth && ab(this.ctx, a);
     }
     c || this.reg.delete(a);
   }
   this.cache && this.cache.remove(a);
   return this;
 };
-function Ua(a, c) {
+function ab(a, c) {
   let b = 0;
   if (a.constructor === Array) {
     for (let e = 0, d, f; e < a.length; e++) {
@@ -1513,24 +1591,24 @@ function Ua(a, c) {
     }
   } else {
     for (let e of a.entries()) {
-      const d = e[0], f = Ua(e[1], c);
+      const d = e[0], f = ab(e[1], c);
       f ? b += f : a.delete(d);
     }
   }
   return b;
 }
-;function X(a, c) {
-  if (!this || this.constructor !== X) {
-    return new X(a);
+;function O(a, c) {
+  if (!this || this.constructor !== O) {
+    return new O(a);
   }
   if (a) {
-    var b = E(a) ? a : a.preset;
-    b && (Qa[b] || console.warn("Preset not found: " + b), a = Object.assign({}, Qa[b], a));
+    var b = D(a) ? a : a.preset;
+    b && (Wa[b] || console.warn("Preset not found: " + b), a = Object.assign({}, Wa[b], a));
   } else {
     a = {};
   }
   b = a.context;
-  const e = !0 === b ? {depth:1} : b || {}, d = E(a.encoder) ? Pa[a.encoder] : a.encode || a.encoder || Ha;
+  const e = !0 === b ? {depth:1} : b || {}, d = D(a.encoder) ? Va[a.encoder] : a.encode || a.encoder || Na;
   this.encoder = d.encode ? d : "object" === typeof d ? new K(d) : {encode:d};
   this.resolution = a.resolution || 9;
   this.tokenize = b = a.tokenize || "strict";
@@ -1544,10 +1622,10 @@ function Ua(a, c) {
   this.reg = c || (this.fastupdate ? new Map() : new Set());
   this.S = e.resolution || 3;
   this.rtl = d.rtl || a.rtl || !1;
-  this.cache = (b = a.cache || null) && new W(b);
+  this.cache = (b = a.cache || null) && new Y(b);
   this.priority = a.priority || 4;
 }
-w = X.prototype;
+w = O.prototype;
 w.clear = function() {
   this.map.clear();
   this.ctx.clear();
@@ -1565,7 +1643,7 @@ w.update = function(a, c) {
   const b = this, e = this.remove(a);
   return e && e.then ? e.then(() => b.add(a, c)) : this.add(a, c);
 };
-function Va(a) {
+function bb(a) {
   let c = 0;
   if (a.constructor === Array) {
     for (let b = 0, e; b < a.length; b++) {
@@ -1573,7 +1651,7 @@ function Va(a) {
     }
   } else {
     for (const b of a) {
-      const e = b[0], d = Va(b[1]);
+      const e = b[0], d = bb(b[1]);
       d ? c += d : a.delete(e);
     }
   }
@@ -1583,17 +1661,17 @@ w.cleanup = function() {
   if (!this.fastupdate) {
     return console.info('Cleanup the index isn\'t required when not using "fastupdate".'), this;
   }
-  Va(this.map);
-  this.depth && Va(this.ctx);
+  bb(this.map);
+  this.depth && bb(this.ctx);
   return this;
 };
-w.searchCache = Ga;
+w.searchCache = Ma;
 w.export = function(a, c, b = 0, e = 0) {
   let d, f;
   switch(e) {
     case 0:
       d = "reg";
-      f = pa(this.reg);
+      f = sa(this.reg);
       break;
     case 1:
       d = "cfg";
@@ -1601,29 +1679,29 @@ w.export = function(a, c, b = 0, e = 0) {
       break;
     case 2:
       d = "map";
-      f = la(this.map, this.reg.size);
+      f = oa(this.map, this.reg.size);
       break;
     case 3:
       d = "ctx";
-      f = na(this.ctx, this.reg.size);
+      f = qa(this.ctx, this.reg.size);
       break;
     default:
       return;
   }
-  return Q.call(this, a, c, d, f, b, e);
+  return ua.call(this, a, c, d, f, b, e);
 };
 w.import = function(a, c) {
   if (c) {
     switch("string" === typeof c && (c = JSON.parse(c)), a = a.split("."), "json" === a[a.length - 1] && a.pop(), a = 1 < a.length ? a[1] : a[0], a) {
       case "reg":
         this.fastupdate = !1;
-        this.reg = qa(c, this.reg);
+        this.reg = ta(c, this.reg);
         break;
       case "map":
-        this.map = ma(c, this.map);
+        this.map = pa(c, this.map);
         break;
       case "ctx":
-        this.ctx = oa(c, this.ctx);
+        this.ctx = ra(c, this.ctx);
     }
   }
 };
@@ -1677,10 +1755,10 @@ w.serialize = function(a = !0) {
   d = "index.ctx=new Map([" + d + "]);";
   return a ? "function inject(index){" + c + e + d + "}" : c + e + d;
 };
-ia(X.prototype);
-const Wa = {Index:X, Charset:Pa, Encoder:K, Document:R, Worker:null, Resolver:null, IndexedDB:null, Language:{}}, Xa = self;
-let Ya;
-(Ya = Xa.define) && Ya.amd ? Ya([], function() {
-  return Wa;
-}) : "object" === typeof Xa.exports ? Xa.exports = Wa : Xa.FlexSearch = Wa;
+ja(O.prototype);
+const cb = {Index:O, Charset:Va, Encoder:K, Document:V, Worker:null, Resolver:null, IndexedDB:null, Language:{}}, db = "undefined" !== typeof self ? self : "undefined" !== typeof global ? global : "undefined" !== typeof window ? window : {};
+let eb;
+(eb = db.define) && eb.amd ? eb([], function() {
+  return cb;
+}) : "object" === typeof db.exports ? db.exports = cb : db.FlexSearch = cb;
 }(this||self));
diff --git a/dist/flexsearch.compact.min.js b/dist/flexsearch.compact.min.js
index 1bacee9..d5e4856 100644
--- a/dist/flexsearch.compact.min.js
+++ b/dist/flexsearch.compact.min.js
@@ -1,12 +1,12 @@
 /**!
- * FlexSearch.js v0.8.107 (Bundle)
+ * FlexSearch.js v0.8.108 (Bundle)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
  * https://github.com/nextapps-de/flexsearch
  */
-(function(self){'use strict';var v;function A(a,c,b){const e=typeof b,d=typeof a;if("undefined"!==e){if("undefined"!==d){if(b){if("function"===d&&e===d)return function(h){return a(b(h))};c=a.constructor;if(c===b.constructor){if(c===Array)return b.concat(a);if(c===Map){var f=new Map(b);for(var g of a)f.set(g[0],g[1]);return f}if(c===Set){g=new Set(b);for(f of a.values())g.add(f);return g}}}return a}return b}return"undefined"===d?c:a}function C(){return Object.create(null)}function E(a){return"string"===typeof a}
-function H(a){return"object"===typeof a}function J(a,c){if(E(c))a=a[c];else for(let b=0;a&&b<c.length;b++)a=a[c[b]];return a}function aa(a){let c=0;for(let b=0,e;b<a.length;b++)(e=a[b])&&c<e.length&&(c=e.length);return c};var ba=[["\u00aa","a"],["\u00b2","2"],["\u00b3","3"],["\u00b9","1"],["\u00ba","o"],["\u00bc","1\u20444"],["\u00bd","1\u20442"],["\u00be","3\u20444"],["\u00e0","a"],["\u00e1","a"],["\u00e2","a"],["\u00e3","a"],["\u00e4","a"],["\u00e5","a"],["\u00e7","c"],["\u00e8","e"],["\u00e9","e"],["\u00ea","e"],["\u00eb","e"],["\u00ec","i"],["\u00ed","i"],["\u00ee","i"],["\u00ef","i"],["\u00f1","n"],["\u00f2","o"],["\u00f3","o"],["\u00f4","o"],["\u00f5","o"],["\u00f6","o"],["\u00f9","u"],["\u00fa","u"],["\u00fb",
+(function(self){'use strict';var v;function A(a,c,b){const e=typeof b,d=typeof a;if("undefined"!==e){if("undefined"!==d){if(b){if("function"===d&&e===d)return function(h){return a(b(h))};c=a.constructor;if(c===b.constructor){if(c===Array)return b.concat(a);if(c===Map){var f=new Map(b);for(var g of a)f.set(g[0],g[1]);return f}if(c===Set){g=new Set(b);for(f of a.values())g.add(f);return g}}}return a}return b}return"undefined"===d?c:a}function C(){return Object.create(null)}function D(a){return"string"===typeof a}
+function H(a){return"object"===typeof a}function I(a,c){if(D(c))a=a[c];else for(let b=0;a&&b<c.length;b++)a=a[c[b]];return a}function aa(a){let c=0;for(let b=0,e;b<a.length;b++)(e=a[b])&&c<e.length&&(c=e.length);return c};var ba=[["\u00aa","a"],["\u00b2","2"],["\u00b3","3"],["\u00b9","1"],["\u00ba","o"],["\u00bc","1\u20444"],["\u00bd","1\u20442"],["\u00be","3\u20444"],["\u00e0","a"],["\u00e1","a"],["\u00e2","a"],["\u00e3","a"],["\u00e4","a"],["\u00e5","a"],["\u00e7","c"],["\u00e8","e"],["\u00e9","e"],["\u00ea","e"],["\u00eb","e"],["\u00ec","i"],["\u00ed","i"],["\u00ee","i"],["\u00ef","i"],["\u00f1","n"],["\u00f2","o"],["\u00f3","o"],["\u00f4","o"],["\u00f5","o"],["\u00f6","o"],["\u00f9","u"],["\u00fa","u"],["\u00fb",
 "u"],["\u00fc","u"],["\u00fd","y"],["\u00ff","y"],["\u0101","a"],["\u0103","a"],["\u0105","a"],["\u0107","c"],["\u0109","c"],["\u010b","c"],["\u010d","c"],["\u010f","d"],["\u0113","e"],["\u0115","e"],["\u0117","e"],["\u0119","e"],["\u011b","e"],["\u011d","g"],["\u011f","g"],["\u0121","g"],["\u0123","g"],["\u0125","h"],["\u0129","i"],["\u012b","i"],["\u012d","i"],["\u012f","i"],["\u0133","ij"],["\u0135","j"],["\u0137","k"],["\u013a","l"],["\u013c","l"],["\u013e","l"],["\u0140","l"],["\u0144","n"],
 ["\u0146","n"],["\u0148","n"],["\u0149","n"],["\u014d","o"],["\u014f","o"],["\u0151","o"],["\u0155","r"],["\u0157","r"],["\u0159","r"],["\u015b","s"],["\u015d","s"],["\u015f","s"],["\u0161","s"],["\u0163","t"],["\u0165","t"],["\u0169","u"],["\u016b","u"],["\u016d","u"],["\u016f","u"],["\u0171","u"],["\u0173","u"],["\u0175","w"],["\u0177","y"],["\u017a","z"],["\u017c","z"],["\u017e","z"],["\u017f","s"],["\u01a1","o"],["\u01b0","u"],["\u01c6","dz"],["\u01c9","lj"],["\u01cc","nj"],["\u01ce","a"],["\u01d0",
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+v.import=function(a,c){if(c){"string"===typeof c&&(c=JSON.parse(c));a=a.split(".");"json"===a[a.length-1]&&a.pop();var b=2<a.length?a[0]:"";a=2<a.length?a[2]:a[1];if(b)return this.index.get(b).import(a,c);switch(a){case "reg":this.fastupdate=!1;this.reg=ta(c,this.reg);for(let e=0,d;e<this.field.length;e++)d=this.index.get(this.field[e]),d.fastupdate=!1,d.reg=this.reg;break;case "tag":this.tag=ra(c,this.tag);break;case "doc":this.store=pa(c,this.store)}}};ja(V.prototype);function Ma(a,c,b){a=("object"===typeof a?""+a.query:a).toLowerCase();this.cache||(this.cache=new Y);let e=this.cache.get(a);if(!e){e=this.search(a,c,b);if(e.then){const d=this;e.then(function(f){d.cache.set(a,f);return f})}this.cache.set(a,e)}return e}function Y(a){this.limit=a&&!0!==a?a:1E3;this.cache=new Map;this.h=""}Y.prototype.set=function(a,c){this.cache.set(this.h=a,c);this.cache.size>this.limit&&this.cache.delete(this.cache.keys().next().value)};
+Y.prototype.get=function(a){const c=this.cache.get(a);c&&this.h!==a&&(this.cache.delete(a),this.cache.set(this.h=a,c));return c};Y.prototype.remove=function(a){for(const c of this.cache){const b=c[0];c[1].includes(a)&&this.cache.delete(b)}};Y.prototype.clear=function(){this.cache.clear();this.h=""};const Na={normalize:function(a){return a.toLowerCase()}};const Oa=new Map([["b","p"],["v","f"],["w","f"],["z","s"],["x","s"],["d","t"],["n","m"],["c","k"],["g","k"],["j","k"],["q","k"],["i","e"],["y","e"],["u","o"]]);const Pa=new Map([["ae","a"],["oe","o"],["sh","s"],["kh","k"],["th","t"],["pf","f"]]),Qa=[/([^aeo])h(.)/g,"$1$2",/([aeo])h([^aeo]|$)/g,"$1$2",/([^0-9])\1+/g,"$1"];const Ra={a:"",e:"",i:"",o:"",u:"",y:"",b:1,f:1,p:1,v:1,c:2,g:2,j:2,k:2,q:2,s:2,x:2,z:2,"\u00df":2,d:3,t:3,l:4,m:5,n:5,r:6};const Sa=/[\x00-\x7F]+/g;const Ta=/[\x00-\x7F]+/g;const Ua=/[\x00-\x7F]+/g;var Va={LatinExact:{normalize:!1,dedupe:!1},LatinDefault:Na,LatinSimple:{normalize:!0,dedupe:!0},LatinBalance:{normalize:!0,dedupe:!0,mapper:Oa},LatinAdvanced:{normalize:!0,dedupe:!0,mapper:Oa,matcher:Pa,replacer:Qa},LatinExtra:{normalize:!0,dedupe:!0,mapper:Oa,replacer:Qa.concat([/(?!^)[aeo]/g,""]),matcher:Pa},LatinSoundex:{normalize:!0,dedupe:!1,include:{letter:!0},finalize:function(a){for(let b=0;b<a.length;b++){var c=a[b];let e=c.charAt(0),d=Ra[e];for(let f=1,g;f<c.length&&(g=c.charAt(f),"h"===
+g||"w"===g||!(g=Ra[g])||g===d||(e+=g,d=g,4!==e.length));f++);a[b]=e}}},ArabicDefault:{rtl:!0,normalize:!1,dedupe:!0,prepare:function(a){return(""+a).replace(Sa," ")}},CjkDefault:{normalize:!1,dedupe:!0,split:"",prepare:function(a){return(""+a).replace(Ta,"")}},CyrillicDefault:{normalize:!1,dedupe:!0,prepare:function(a){return(""+a).replace(Ua," ")}}};const Wa={memory:{resolution:1},performance:{resolution:6,fastupdate:!0,context:{depth:1,resolution:3}},match:{tokenize:"forward"},score:{resolution:9,context:{depth:2,resolution:9}}};O.prototype.add=function(a,c,b,e){if(c&&(a||0===a)){if(!e&&!b&&this.reg.has(a))return this.update(a,c);c=this.encoder.encode(c);if(e=c.length){const l=C(),m=C(),n=this.depth,t=this.resolution;for(let p=0;p<e;p++){let q=c[this.rtl?e-1-p:p];var d=q.length;if(d&&(n||!m[q])){var f=this.score?this.score(c,q,p,null,0):Xa(t,e,p),g="";switch(this.tokenize){case "full":if(2<d){for(f=0;f<d;f++)for(var h=d;h>f;h--){g=q.substring(f,h);var k=this.score?this.score(c,q,p,g,f):Xa(t,e,p,d,f);Z(this,m,g,k,a,b)}break}case "reverse":if(1<
+d){for(h=d-1;0<h;h--)g=q[h]+g,k=this.score?this.score(c,q,p,g,h):Xa(t,e,p,d,h),Z(this,m,g,k,a,b);g=""}case "forward":if(1<d){for(h=0;h<d;h++)g+=q[h],Z(this,m,g,f,a,b);break}default:if(Z(this,m,q,f,a,b),n&&1<e&&p<e-1)for(d=C(),g=this.S,f=q,h=Math.min(n+1,e-p),d[f]=1,k=1;k<h;k++)if((q=c[this.rtl?e-1-p-k:p+k])&&!d[q]){d[q]=1;const y=this.score?this.score(c,f,p,q,k):Xa(g+(e/2>g?0:1),e,p,h-1,k-1),w=this.bidirectional&&q>f;Z(this,l,w?f:q,y,a,b,w?q:f)}}}}this.fastupdate||this.reg.add(a)}}return this};
+function Z(a,c,b,e,d,f,g){let h=g?a.ctx:a.map,k;if(!c[b]||g&&!(k=c[b])[g])g?(c=k||(c[b]=C()),c[g]=1,(k=h.get(g))?h=k:h.set(g,h=new Map)):c[b]=1,(k=h.get(b))?h=k:h.set(b,h=[]),h=h[e]||(h[e]=[]),f&&h.includes(d)||(h.push(d),a.fastupdate&&((c=a.reg.get(d))?c.push(h):a.reg.set(d,[h])))}function Xa(a,c,b,e,d){return b&&1<a?c+(e||0)<=a?b+(d||0):(a-1)/(c+(e||0))*(b+(d||0))+1|0:0};O.prototype.search=function(a,c,b){b||(!c&&H(a)?(b=a,a=""):H(c)&&(b=c,c=0));var e=[],d=0;if(b){a=b.query||a;c=b.limit||c;d=b.offset||0;var f=b.context;var g=b.suggest;var h=!0;var k=b.resolution}else h=!0;b=this.encoder.encode(a);a=b.length;c=c||(h?100:0);if(1===a)return Ya.call(this,b[0],"",c,d,h);f=this.depth&&!1!==f;if(2===a&&f&&!g)return Ya.call(this,b[0],b[1],c,d,h);h=C();let l=0;if(1<a&&f){var m=b[0];l=1}k||0===k||(k=m?this.S:this.resolution);for(let q,y;l<a;l++){if((y=b[l])&&!h[y]){h[y]=1;
+q=$a(this,y,m);a:{f=q;var n=e,t=g,p=k;let w=[];if(f&&f.length){if(f.length<=p){n.push(f);q=void 0;break a}for(let u=0,z;u<p;u++)if(z=f[u])w[u]=z;if(w.length){n.push(w);q=void 0;break a}}q=t?void 0:w}if(q){e=q;break}m&&(g&&q&&e.length||(m=y))}g&&m&&l===a-1&&!e.length&&(m="",l=-1,h=C())}a:{m=e.length;a=e;if(1<m)a=xa(e,k,c,d,g);else if(1===m){g=Aa.call(null,e[0],c,d);break a}g=a}return g};function Ya(a,c,b,e,d){a=$a(this,a,c);d=!0;return a&&a.length?d?Aa.call(this,a,b,e):new X(a):d?[]:new X}
+function $a(a,c,b){let e;b&&(e=a.bidirectional&&c>b)&&(e=b,b=c,c=e);a=b?(a=a.ctx.get(b))&&a.get(c):a.map.get(c);return a};O.prototype.remove=function(a,c){const b=this.reg.size&&(this.fastupdate?this.reg.get(a):this.reg.has(a));if(b){if(this.fastupdate)for(let e=0,d;e<b.length;e++){if(d=b[e])if(2>d.length)d.pop();else{const f=d.indexOf(a);f===b.length-1?d.pop():d.splice(f,1)}}else ab(this.map,a),this.depth&&ab(this.ctx,a);c||this.reg.delete(a)}this.cache&&this.cache.remove(a);return this};
+function ab(a,c){let b=0;if(a.constructor===Array)for(let e=0,d,f;e<a.length;e++){if((d=a[e])&&d.length)if(f=d.indexOf(c),0<=f){1<d.length?(d.splice(f,1),b++):delete a[e];break}else b++}else for(let e of a.entries()){const d=e[0],f=ab(e[1],c);f?b+=f:a.delete(d)}return b};function O(a,c){if(!this||this.constructor!==O)return new O(a);if(a){var b=D(a)?a:a.preset;b&&(a=Object.assign({},Wa[b],a))}else a={};b=a.context;const e=!0===b?{depth:1}:b||{},d=D(a.encoder)?Va[a.encoder]:a.encode||a.encoder||Na;this.encoder=d.encode?d:"object"===typeof d?new K(d):{encode:d};this.resolution=a.resolution||9;this.tokenize=b=a.tokenize||"strict";this.depth="strict"===b&&e.depth||0;this.bidirectional=!1!==e.bidirectional;this.fastupdate=!!a.fastupdate;this.score=a.score||null;b=!1;this.map=
+new Map;this.ctx=new Map;this.reg=c||(this.fastupdate?new Map:new Set);this.S=e.resolution||3;this.rtl=d.rtl||a.rtl||!1;this.cache=(b=a.cache||null)&&new Y(b);this.priority=a.priority||4}v=O.prototype;v.clear=function(){this.map.clear();this.ctx.clear();this.reg.clear();this.cache&&this.cache.clear();return this};v.append=function(a,c){return this.add(a,c,!0)};v.contain=function(a){return this.reg.has(a)};
+v.update=function(a,c){const b=this,e=this.remove(a);return e&&e.then?e.then(()=>b.add(a,c)):this.add(a,c)};function bb(a){let c=0;if(a.constructor===Array)for(let b=0,e;b<a.length;b++)(e=a[b])&&(c+=e.length);else for(const b of a){const e=b[0],d=bb(b[1]);d?c+=d:a.delete(e)}return c}v.cleanup=function(){if(!this.fastupdate)return this;bb(this.map);this.depth&&bb(this.ctx);return this};v.searchCache=Ma;
+v.export=function(a,c,b=0,e=0){let d,f;switch(e){case 0:d="reg";f=sa(this.reg);break;case 1:d="cfg";f=null;break;case 2:d="map";f=oa(this.map,this.reg.size);break;case 3:d="ctx";f=qa(this.ctx,this.reg.size);break;default:return}return ua.call(this,a,c,d,f,b,e)};
+v.import=function(a,c){if(c)switch("string"===typeof c&&(c=JSON.parse(c)),a=a.split("."),"json"===a[a.length-1]&&a.pop(),a=1<a.length?a[1]:a[0],a){case "reg":this.fastupdate=!1;this.reg=ta(c,this.reg);break;case "map":this.map=pa(c,this.map);break;case "ctx":this.ctx=ra(c,this.ctx)}};
 v.serialize=function(a=!0){if(!this.reg.size)return"";let c="",b="";for(var e of this.reg.keys())b||(b=typeof e),c+=(c?",":"")+("string"===b?'"'+e+'"':e);c="index.reg=new Set(["+c+"]);";e="";for(var d of this.map.entries()){var f=d[0],g=d[1],h="";for(let m=0,n;m<g.length;m++){n=g[m]||[""];var k="";for(var l=0;l<n.length;l++)k+=(k?",":"")+("string"===b?'"'+n[l]+'"':n[l]);k="["+k+"]";h+=(h?",":"")+k}h='["'+f+'",['+h+"]]";e+=(e?",":"")+h}e="index.map=new Map(["+e+"]);";d="";for(const m of this.ctx.entries()){f=
-m[0];g=m[1];for(const n of g.entries()){g=n[0];h=n[1];k="";for(let t=0,p;t<h.length;t++){p=h[t]||[""];l="";for(let q=0;q<p.length;q++)l+=(l?",":"")+("string"===b?'"'+p[q]+'"':p[q]);l="["+l+"]";k+=(k?",":"")+l}k='new Map([["'+g+'",['+k+"]]])";k='["'+f+'",'+k+"]";d+=(d?",":"")+k}}d="index.ctx=new Map(["+d+"]);";return a?"function inject(index){"+c+e+d+"}":c+e+d};ia(X.prototype);const Wa={Index:X,Charset:Pa,Encoder:K,Document:R,Worker:null,Resolver:null,IndexedDB:null,Language:{}},Xa=self;let Ya;(Ya=Xa.define)&&Ya.amd?Ya([],function(){return Wa}):"object"===typeof Xa.exports?Xa.exports=Wa:Xa.FlexSearch=Wa;}(this||self));
+m[0];g=m[1];for(const n of g.entries()){g=n[0];h=n[1];k="";for(let t=0,p;t<h.length;t++){p=h[t]||[""];l="";for(let q=0;q<p.length;q++)l+=(l?",":"")+("string"===b?'"'+p[q]+'"':p[q]);l="["+l+"]";k+=(k?",":"")+l}k='new Map([["'+g+'",['+k+"]]])";k='["'+f+'",'+k+"]";d+=(d?",":"")+k}}d="index.ctx=new Map(["+d+"]);";return a?"function inject(index){"+c+e+d+"}":c+e+d};ja(O.prototype);const cb={Index:O,Charset:Va,Encoder:K,Document:V,Worker:null,Resolver:null,IndexedDB:null,Language:{}},db="undefined"!==typeof self?self:"undefined"!==typeof global?global:"undefined"!==typeof window?window:{};let eb;(eb=db.define)&&eb.amd?eb([],function(){return cb}):"object"===typeof db.exports?db.exports=cb:db.FlexSearch=cb;}(this||self));
diff --git a/dist/flexsearch.compact.module.debug.js b/dist/flexsearch.compact.module.debug.js
index 5f81eaa..87caca9 100644
--- a/dist/flexsearch.compact.module.debug.js
+++ b/dist/flexsearch.compact.module.debug.js
@@ -1,5 +1,5 @@
 /**!
- * FlexSearch.js v0.8.107 (Bundle/Debug)
+ * FlexSearch.js v0.8.108 (Bundle/Debug)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
@@ -46,14 +46,14 @@ function A(a, c, b) {
 function C() {
   return Object.create(null);
 }
-function E(a) {
+function D(a) {
   return "string" === typeof a;
 }
-function I(a) {
+function H(a) {
   return "object" === typeof a;
 }
 function J(a, c) {
-  if (E(c)) {
+  if (D(c)) {
     a = a[c];
   } else {
     for (let b = 0; a && b < c.length; b++) {
@@ -261,30 +261,48 @@ function L(a) {
   a.F.clear();
   a.G.clear();
 }
-;function ia(a) {
-  M.call(a, "add");
-  M.call(a, "append");
-  M.call(a, "search");
-  M.call(a, "update");
-  M.call(a, "remove");
+;let M, N;
+async function ia(a) {
+  a = a.data;
+  const c = a.task, b = a.id;
+  let e = a.args;
+  switch(c) {
+    case "init":
+      N = a.options || {};
+      (a = a.factory) ? (Function("return " + a)()(self), M = new self.FlexSearch.Index(N), delete self.FlexSearch) : M = new O(N);
+      postMessage({id:b});
+      break;
+    default:
+      let d;
+      "export" === c && (e = [N.export]);
+      "import" === c ? await N.import.call(M, M) : d = M[c].apply(M, e);
+      postMessage("search" === c ? {id:b, msg:d} : {id:b});
+  }
 }
-let N, ja;
-const O = {}, P = {};
-function ka(a) {
-  N = 0;
-  O[a] = P[a];
+;function ja(a) {
+  P.call(a, "add");
+  P.call(a, "append");
+  P.call(a, "search");
+  P.call(a, "update");
+  P.call(a, "remove");
 }
-function M(a) {
+let Q, ka;
+const R = {}, S = {};
+function la(a) {
+  Q = 0;
+  R[a] = S[a];
+}
+function P(a) {
   this[a + "Async"] = function() {
     const c = arguments;
     var b = c[c.length - 1];
     let e;
     "function" === typeof b && (e = b, delete c[c.length - 1]);
-    N || (N = setTimeout(ka, 0, a), ja = Date.now());
-    P[a] || (P[a] = O[a] = 1000);
-    if (!--O[a]) {
-      O[a] = P[a] = P[a] * this.priority * this.priority * 3 / (Date.now() - ja) | 0 || 1;
-      N = clearTimeout(N);
+    Q || (Q = setTimeout(la, 0, a), ka = Date.now());
+    S[a] || (S[a] = R[a] = 1000);
+    if (!--R[a]) {
+      R[a] = S[a] = S[a] * this.priority * this.priority * 3 / (Date.now() - ka) | 0 || 1;
+      Q = clearTimeout(Q);
       const f = this;
       return new Promise(g => {
         setTimeout(function() {
@@ -298,7 +316,67 @@ function M(a) {
     return b;
   };
 }
-;function la(a, c = 0) {
+;let T = 0;
+function ma(a = {}) {
+  function c(g) {
+    function h(k) {
+      k = k.data || k;
+      const l = k.id, m = l && d.h[l];
+      m && (m(k.msg), delete d.h[l]);
+    }
+    this.worker = g;
+    this.h = C();
+    if (this.worker) {
+      e ? this.worker.on("message", h) : this.worker.onmessage = h;
+      if (a.config) {
+        return new Promise(function(k) {
+          d.h[++T] = function() {
+            k(d);
+          };
+          d.worker.postMessage({id:T, task:"init", factory:b, options:a});
+        });
+      }
+      this.worker.postMessage({task:"init", factory:b, options:a});
+      return this;
+    }
+  }
+  if (!this || this.constructor !== ma) {
+    return new ma(a);
+  }
+  let b = "undefined" !== typeof self ? self._factory : "undefined" !== typeof window ? window._factory : null;
+  b && (b = b.toString());
+  const e = "undefined" === typeof window, d = this, f = na(b, e, a.worker);
+  return f.then ? f.then(function(g) {
+    return c.call(d, g);
+  }) : c.call(this, f);
+}
+U("add");
+U("append");
+U("search");
+U("update");
+U("remove");
+U("clear");
+U("export");
+U("import");
+ja(ma.prototype);
+function U(a) {
+  ma.prototype[a] = async function() {
+    const c = this, b = [].slice.call(arguments);
+    var e = b[b.length - 1];
+    let d;
+    "function" === typeof e && (d = e, b.splice(b.length - 1, 1));
+    e = new Promise(function(f) {
+      c.h[++T] = f;
+      c.worker.postMessage({task:a, id:T, args:b});
+    });
+    return d ? (e.then(d), this) : e;
+  };
+}
+function na(a, c, b) {
+  return c ? "undefined" !== typeof module ? new (require("worker_threads")["Worker"])(__dirname + "/node/node.js") : import("worker_threads").then(function(worker){ return new worker["Worker"](import.meta.dirname + "/node/node.mjs"); }) : a ? new window.Worker(URL.createObjectURL(new Blob(["onmessage=" + ia.toString()], {type:"text/javascript"}))) : new window.Worker(D(b) ? b : import.meta.url.replace("/worker.js", "/worker/worker.js").replace("flexsearch.bundle.module.min.js", 
+  "module/worker/worker.js"), {type:"module"});
+}
+;function oa(a, c = 0) {
   let b = [], e = [];
   c && (c = 250000 / c * 5000 | 0);
   for (const d of a.entries()) {
@@ -307,30 +385,30 @@ function M(a) {
   e.length && b.push(e);
   return b;
 }
-function ma(a, c) {
+function pa(a, c) {
   c || (c = new Map());
   for (let b = 0, e; b < a.length; b++) {
     e = a[b], c.set(e[0], e[1]);
   }
   return c;
 }
-function na(a, c = 0) {
+function qa(a, c = 0) {
   let b = [], e = [];
   c && (c = 250000 / c * 1000 | 0);
   for (const d of a.entries()) {
-    e.push([d[0], la(d[1])[0]]), e.length === c && (b.push(e), e = []);
+    e.push([d[0], oa(d[1])[0]]), e.length === c && (b.push(e), e = []);
   }
   e.length && b.push(e);
   return b;
 }
-function oa(a, c) {
+function ra(a, c) {
   c || (c = new Map());
   for (let b = 0, e, d; b < a.length; b++) {
-    e = a[b], d = c.get(e[0]), c.set(e[0], ma(e[1], d));
+    e = a[b], d = c.get(e[0]), c.set(e[0], pa(e[1], d));
   }
   return c;
 }
-function pa(a) {
+function sa(a) {
   let c = [], b = [];
   for (const e of a.keys()) {
     b.push(e), 250000 === b.length && (c.push(b), b = []);
@@ -338,14 +416,14 @@ function pa(a) {
   b.length && c.push(b);
   return c;
 }
-function qa(a, c) {
+function ta(a, c) {
   c || (c = new Set());
   for (let b = 0; b < a.length; b++) {
     c.add(a[b]);
   }
   return c;
 }
-function Q(a, c, b, e, d, f, g = 0) {
+function ua(a, c, b, e, d, f, g = 0) {
   const h = e && e.constructor === Array;
   var k = h ? e.shift() : e;
   if (!k) {
@@ -354,13 +432,13 @@ function Q(a, c, b, e, d, f, g = 0) {
   if ((k = a((c ? c + "." : "") + (g + 1) + "." + b, JSON.stringify(k))) && k.then) {
     const l = this;
     return k.then(function() {
-      return Q.call(l, a, c, b, h ? e : null, d, f, g + 1);
+      return ua.call(l, a, c, b, h ? e : null, d, f, g + 1);
     });
   }
-  return Q.call(this, a, c, b, h ? e : null, d, f, g + 1);
+  return ua.call(this, a, c, b, h ? e : null, d, f, g + 1);
 }
-;R.prototype.add = function(a, c, b) {
-  I(a) && (c = a, a = J(c, this.key));
+;V.prototype.add = function(a, c, b) {
+  H(a) && (c = a, a = J(c, this.key));
   if (c && (a || 0 === a)) {
     if (!b && this.reg.has(a)) {
       return this.update(a, c);
@@ -373,7 +451,7 @@ function Q(a, c, b, e, d, f, g = 0) {
         d && e.add(a, d, !1, !0);
       } else {
         if (d = k.I, !d || d(c)) {
-          k.constructor === String ? k = ["" + k] : E(k) && (k = [k]), ra(c, k, this.J, 0, e, a, k[0], b);
+          k.constructor === String ? k = ["" + k] : D(k) && (k = [k]), va(c, k, this.J, 0, e, a, k[0], b);
         }
       }
     }
@@ -395,7 +473,7 @@ function Q(a, c, b, e, d, f, g = 0) {
           f = J(c, f);
         }
         if (d && f) {
-          E(f) && (f = [f]);
+          D(f) && (f = [f]);
           for (let k = 0, l, m; k < f.length; k++) {
             l = f[k], h[l] || (h[l] = 1, (g = d.get(l)) ? m = g : d.set(l, m = []), b && m.includes(a) || (m.push(a), this.fastupdate && ((g = this.reg.get(a)) ? g.push(m) : this.reg.set(a, [m]))));
           }
@@ -420,11 +498,11 @@ function Q(a, c, b, e, d, f, g = 0) {
               continue;
             }
             l = [l.U];
-          } else if (E(l) || l.constructor === String) {
+          } else if (D(l) || l.constructor === String) {
             h[l] = c[l];
             continue;
           }
-          sa(c, h, l, 0, l[0], m);
+          wa(c, h, l, 0, l[0], m);
         }
       }
       this.store.set(a, h || c);
@@ -432,21 +510,21 @@ function Q(a, c, b, e, d, f, g = 0) {
   }
   return this;
 };
-function sa(a, c, b, e, d, f) {
+function wa(a, c, b, e, d, f) {
   a = a[d];
   if (e === b.length - 1) {
     c[d] = f || a;
   } else if (a) {
     if (a.constructor === Array) {
       for (c = c[d] = Array(a.length), d = 0; d < a.length; d++) {
-        sa(a, c, b, e, d);
+        wa(a, c, b, e, d);
       }
     } else {
-      c = c[d] || (c[d] = C()), d = b[++e], sa(a, c, b, e, d);
+      c = c[d] || (c[d] = C()), d = b[++e], wa(a, c, b, e, d);
     }
   }
 }
-function ra(a, c, b, e, d, f, g, h) {
+function va(a, c, b, e, d, f, g, h) {
   if (a = a[g]) {
     if (e === c.length - 1) {
       if (a.constructor === Array) {
@@ -462,15 +540,15 @@ function ra(a, c, b, e, d, f, g, h) {
     } else {
       if (a.constructor === Array) {
         for (g = 0; g < a.length; g++) {
-          ra(a, c, b, e, d, f, g, h);
+          va(a, c, b, e, d, f, g, h);
         }
       } else {
-        g = c[++e], ra(a, c, b, e, d, f, g, h);
+        g = c[++e], va(a, c, b, e, d, f, g, h);
       }
     }
   }
 }
-;function ta(a, c, b, e, d) {
+;function xa(a, c, b, e, d) {
   const f = a.length;
   let g = [], h, k;
   h = C();
@@ -485,7 +563,7 @@ function ra(a, c, b, e, d, f, g, h) {
   }
   if (a = g.length) {
     if (d) {
-      g = 1 < g.length ? ua(g, b, e) : (g = g[0]).length > b || e ? g.slice(e, b + e) : g;
+      g = 1 < g.length ? ya(g, b, e) : (g = g[0]).length > b || e ? g.slice(e, b + e) : g;
     } else {
       if (a < f) {
         return [];
@@ -500,7 +578,7 @@ function ra(a, c, b, e, d, f, g, h) {
   }
   return g;
 }
-function ua(a, c, b) {
+function ya(a, c, b) {
   const e = [], d = C();
   let f;
   var g = a.length;
@@ -522,7 +600,7 @@ function ua(a, c, b) {
   }
   return e;
 }
-function va(a, c, b) {
+function za(a, c, b) {
   const e = C(), d = [];
   for (let f = 0, g; f < c.length; f++) {
     g = c[f];
@@ -543,12 +621,12 @@ function va(a, c, b) {
   }
   return d;
 }
-;function wa(a, c, b, e) {
+;function Aa(a, c, b, e) {
   if (!a.length) {
     return a;
   }
   if (1 === a.length) {
-    return a = a[0], a = b || a.length > c ? c ? a.slice(b, b + c) : a.slice(b) : a, e ? S.call(this, a) : a;
+    return a = a[0], a = b || a.length > c ? c ? a.slice(b, b + c) : a.slice(b) : a, e ? W.call(this, a) : a;
   }
   let d = [];
   for (let f = 0, g, h; f < a.length; f++) {
@@ -562,7 +640,7 @@ function va(a, c, b) {
       }
       h > c && (g = g.slice(0, c), h = c);
       if (!d.length && h >= c) {
-        return e ? S.call(this, g) : g;
+        return e ? W.call(this, g) : g;
       }
       d.push(g);
       c -= h;
@@ -572,9 +650,9 @@ function va(a, c, b) {
     }
   }
   d = 1 < d.length ? [].concat.apply([], d) : d[0];
-  return e ? S.call(this, d) : d;
+  return e ? W.call(this, d) : d;
 }
-;function T(a, c, b) {
+;function Ba(a, c, b) {
   var e = b[0];
   if (e.then) {
     return Promise.all(b).then(function(m) {
@@ -589,7 +667,7 @@ function va(a, c, b) {
   for (let m = 0, n; m < b.length; m++) {
     if (n = b[m]) {
       let t;
-      if (n.constructor === U) {
+      if (n.constructor === X) {
         t = n.result;
       } else if (n.constructor === Array) {
         t = n;
@@ -620,11 +698,11 @@ function va(a, c, b) {
   }
   return {O:e, P:d, limit:f, offset:g, enrich:h, resolve:k, suggest:l};
 }
-;U.prototype.or = function() {
-  const {O:a, P:c, limit:b, offset:e, enrich:d, resolve:f} = T(this, "or", arguments);
-  return xa.call(this, a, c, b, e, d, f);
+;X.prototype.or = function() {
+  const {O:a, P:c, limit:b, offset:e, enrich:d, resolve:f} = Ba(this, "or", arguments);
+  return Ca.call(this, a, c, b, e, d, f);
 };
-function xa(a, c, b, e, d, f) {
+function Ca(a, c, b, e, d, f) {
   if (c.length) {
     const g = this;
     return Promise.all(c).then(function(h) {
@@ -632,25 +710,25 @@ function xa(a, c, b, e, d, f) {
       for (let k = 0, l; k < h.length; k++) {
         (l = h[k]).length && (a[k] = l);
       }
-      return xa.call(g, a, [], b, e, d, f);
+      return Ca.call(g, a, [], b, e, d, f);
     });
   }
-  a.length && (this.result.length && a.push(this.result), 2 > a.length ? this.result = a[0] : (this.result = ua(a, b, e), e = 0));
+  a.length && (this.result.length && a.push(this.result), 2 > a.length ? this.result = a[0] : (this.result = ya(a, b, e), e = 0));
   return f ? this.resolve(b, e, d) : this;
 }
-;U.prototype.and = function() {
+;X.prototype.and = function() {
   let a = this.result.length, c, b, e, d;
   if (!a) {
     const f = arguments[0];
     f && (a = !!f.suggest, d = f.resolve, c = f.limit, b = f.offset, e = f.enrich && d);
   }
   if (a) {
-    const {O:f, P:g, limit:h, offset:k, enrich:l, resolve:m, suggest:n} = T(this, "and", arguments);
-    return ya.call(this, f, g, h, k, l, m, n);
+    const {O:f, P:g, limit:h, offset:k, enrich:l, resolve:m, suggest:n} = Ba(this, "and", arguments);
+    return Da.call(this, f, g, h, k, l, m, n);
   }
   return d ? this.resolve(c, b, e) : this;
 };
-function ya(a, c, b, e, d, f, g) {
+function Da(a, c, b, e, d, f, g) {
   if (c.length) {
     const h = this;
     return Promise.all(c).then(function(k) {
@@ -658,7 +736,7 @@ function ya(a, c, b, e, d, f, g) {
       for (let l = 0, m; l < k.length; l++) {
         (m = k[l]).length && (a[l] = m);
       }
-      return ya.call(h, a, [], b, e, d, f, g);
+      return Da.call(h, a, [], b, e, d, f, g);
     });
   }
   if (a.length) {
@@ -666,7 +744,7 @@ function ya(a, c, b, e, d, f, g) {
       this.result = a[0];
     } else {
       if (c = aa(a)) {
-        return this.result = ta(a, c, b, e, g), f ? d ? S.call(this.index, this.result) : this.result : this;
+        return this.result = xa(a, c, b, e, g), f ? d ? W.call(this.index, this.result) : this.result : this;
       }
       this.result = [];
     }
@@ -675,11 +753,11 @@ function ya(a, c, b, e, d, f, g) {
   }
   return f ? this.resolve(b, e, d) : this;
 }
-;U.prototype.xor = function() {
-  const {O:a, P:c, limit:b, offset:e, enrich:d, resolve:f, suggest:g} = T(this, "xor", arguments);
-  return za.call(this, a, c, b, e, d, f, g);
+;X.prototype.xor = function() {
+  const {O:a, P:c, limit:b, offset:e, enrich:d, resolve:f, suggest:g} = Ba(this, "xor", arguments);
+  return Ea.call(this, a, c, b, e, d, f, g);
 };
-function za(a, c, b, e, d, f, g) {
+function Ea(a, c, b, e, d, f, g) {
   if (c.length) {
     const h = this;
     return Promise.all(c).then(function(k) {
@@ -687,21 +765,21 @@ function za(a, c, b, e, d, f, g) {
       for (let l = 0, m; l < k.length; l++) {
         (m = k[l]).length && (a[l] = m);
       }
-      return za.call(h, a, [], b, e, d, f, g);
+      return Ea.call(h, a, [], b, e, d, f, g);
     });
   }
   if (a.length) {
     if (this.result.length && a.unshift(this.result), 2 > a.length) {
       this.result = a[0];
     } else {
-      return this.result = Aa.call(this, a, b, e, f, this.h), f ? d ? S.call(this.index, this.result) : this.result : this;
+      return this.result = Fa.call(this, a, b, e, f, this.h), f ? d ? W.call(this.index, this.result) : this.result : this;
     }
   } else {
     g || (this.result = a);
   }
   return f ? this.resolve(b, e, d) : this;
 }
-function Aa(a, c, b, e, d) {
+function Fa(a, c, b, e, d) {
   const f = [], g = C();
   let h = 0;
   for (let k = 0, l; k < a.length; k++) {
@@ -746,11 +824,11 @@ function Aa(a, c, b, e, d) {
   }
   return f;
 }
-;U.prototype.not = function() {
-  const {O:a, P:c, limit:b, offset:e, enrich:d, resolve:f, suggest:g} = T(this, "not", arguments);
-  return Ba.call(this, a, c, b, e, d, f, g);
+;X.prototype.not = function() {
+  const {O:a, P:c, limit:b, offset:e, enrich:d, resolve:f, suggest:g} = Ba(this, "not", arguments);
+  return Ga.call(this, a, c, b, e, d, f, g);
 };
-function Ba(a, c, b, e, d, f, g) {
+function Ga(a, c, b, e, d, f, g) {
   if (c.length) {
     const h = this;
     return Promise.all(c).then(function(k) {
@@ -758,17 +836,17 @@ function Ba(a, c, b, e, d, f, g) {
       for (let l = 0, m; l < k.length; l++) {
         (m = k[l]).length && (a[l] = m);
       }
-      return Ba.call(h, a, [], b, e, d, f, g);
+      return Ga.call(h, a, [], b, e, d, f, g);
     });
   }
   if (a.length && this.result.length) {
-    this.result = Ca.call(this, a, b, e, f);
+    this.result = Ha.call(this, a, b, e, f);
   } else if (f) {
     return this.resolve(b, e, d);
   }
-  return f ? d ? S.call(this.index, this.result) : this.result : this;
+  return f ? d ? W.call(this.index, this.result) : this.result : this;
 }
-function Ca(a, c, b, e) {
+function Ha(a, c, b, e) {
   const d = [];
   a = new Set(a.flat().flat());
   for (let f = 0, g, h = 0; f < this.result.length; f++) {
@@ -794,9 +872,9 @@ function Ca(a, c, b, e) {
   }
   return d;
 }
-;function U(a) {
-  if (!this || this.constructor !== U) {
-    return new U(a);
+;function X(a) {
+  if (!this || this.constructor !== X) {
+    return new X(a);
   }
   if (a && a.index) {
     return a.resolve = !1, this.index = a.index, this.h = a.boost || 0, this.result = a.index.search(a).result, this;
@@ -805,7 +883,7 @@ function Ca(a, c, b, e) {
   this.result = a || [];
   this.h = 0;
 }
-U.prototype.limit = function(a) {
+X.prototype.limit = function(a) {
   if (this.result.length) {
     const c = [];
     for (let b = 0, e; b < this.result.length; b++) {
@@ -824,7 +902,7 @@ U.prototype.limit = function(a) {
   }
   return this;
 };
-U.prototype.offset = function(a) {
+X.prototype.offset = function(a) {
   if (this.result.length) {
     const c = [];
     for (let b = 0, e; b < this.result.length; b++) {
@@ -836,18 +914,18 @@ U.prototype.offset = function(a) {
   }
   return this;
 };
-U.prototype.boost = function(a) {
+X.prototype.boost = function(a) {
   this.h += a;
   return this;
 };
-U.prototype.resolve = function(a, c, b) {
+X.prototype.resolve = function(a, c, b) {
   const e = this.result, d = this.index;
   this.result = this.index = null;
-  return e.length ? ("object" === typeof a && (b = a.enrich, c = a.offset, a = a.limit), wa.call(d, e, a || 100, c, b)) : e;
+  return e.length ? ("object" === typeof a && (b = a.enrich, c = a.offset, a = a.limit), Aa.call(d, e, a || 100, c, b)) : e;
 };
 C();
-R.prototype.search = function(a, c, b, e) {
-  b || (!c && I(a) ? (b = a, a = "") : I(c) && (b = c, c = 0));
+V.prototype.search = function(a, c, b, e) {
+  b || (!c && H(a) ? (b = a, a = "") : H(c) && (b = c, c = 0));
   let d = [];
   var f = [];
   let g, h, k, l, m, n, t = 0, p, q;
@@ -871,7 +949,7 @@ R.prototype.search = function(a, c, b, e) {
       var u = [];
       for (let x = 0, r; x < m.length; x++) {
         r = m[x];
-        if (E(r)) {
+        if (D(r)) {
           throw Error("A tag option can't be a string, instead it needs a { field: tag } format.");
         }
         if (r.field && r.tag) {
@@ -885,8 +963,8 @@ R.prototype.search = function(a, c, b, e) {
           }
         } else {
           v = Object.keys(r);
-          for (let D = 0, F, B; D < v.length; D++) {
-            if (F = v[D], B = r[F], B.constructor === Array) {
+          for (let E = 0, F, B; E < v.length; E++) {
+            if (F = v[E], B = r[F], B.constructor === Array) {
               for (z = 0; z < B.length; z++) {
                 u.push(F, B[z]);
               }
@@ -904,7 +982,7 @@ R.prototype.search = function(a, c, b, e) {
         e = [];
         if (u.length) {
           for (f = 0; f < u.length; f += 2) {
-            y = Da.call(this, u[f], u[f + 1], c, n, g), d.push({field:u[f], tag:u[f + 1], result:y});
+            y = Ia.call(this, u[f], u[f + 1], c, n, g), d.push({field:u[f], tag:u[f + 1], result:y});
           }
         }
         return e.length ? Promise.all(e).then(function(x) {
@@ -919,14 +997,14 @@ R.prototype.search = function(a, c, b, e) {
   }
   l || (l = this.field);
   u = !e && (this.worker || this.db) && [];
-  for (let x = 0, r, D, F; x < l.length; x++) {
-    D = l[x];
+  for (let x = 0, r, E, F; x < l.length; x++) {
+    E = l[x];
     let B;
-    E(D) || (B = D, D = B.field, a = B.query || a, c = B.limit || c, n = B.offset || n, k = B.suggest || k, g = this.store && (B.enrich || g));
+    D(E) || (B = E, E = B.field, a = B.query || a, c = B.limit || c, n = B.offset || n, k = B.suggest || k, g = this.store && (B.enrich || g));
     if (e) {
       r = e[x];
     } else {
-      if (v = B || b, z = this.index.get(D), m && (v.enrich = !1), u) {
+      if (v = B || b, z = this.index.get(E), m && (v.enrich = !1), u) {
         u[x] = z.search(a, c, v);
         v && g && (v.enrich = g);
         continue;
@@ -938,34 +1016,34 @@ R.prototype.search = function(a, c, b, e) {
     if (m && F) {
       v = [];
       z = 0;
-      for (let G = 0, H, Qa; G < m.length; G += 2) {
-        H = this.tag.get(m[G]);
-        if (!H) {
+      for (let G = 0, I, Xa; G < m.length; G += 2) {
+        I = this.tag.get(m[G]);
+        if (!I) {
           if (console.warn("Tag '" + m[G] + ":" + m[G + 1] + "' will be skipped because there is no field '" + m[G] + "'."), k) {
             continue;
           } else {
-            return p ? d : new U(d);
+            return p ? d : new X(d);
           }
         }
-        if (Qa = (H = H && H.get(m[G + 1])) && H.length) {
-          z++, v.push(H);
+        if (Xa = (I = I && I.get(m[G + 1])) && I.length) {
+          z++, v.push(I);
         } else if (!k) {
-          return p ? d : new U(d);
+          return p ? d : new X(d);
         }
       }
       if (z) {
-        r = va(r, v, p);
+        r = za(r, v, p);
         F = r.length;
         if (!F && !k) {
-          return p ? r : new U(r);
+          return p ? r : new X(r);
         }
         z--;
       }
     }
     if (F) {
-      f[t] = D, d.push(r), t++;
+      f[t] = E, d.push(r), t++;
     } else if (1 === l.length) {
-      return p ? d : new U(d);
+      return p ? d : new X(d);
     }
   }
   if (u) {
@@ -975,7 +1053,7 @@ R.prototype.search = function(a, c, b, e) {
     });
   }
   if (!t) {
-    return p ? d : new U(d);
+    return p ? d : new X(d);
   }
   if (y && (!g || !this.store)) {
     return d[0];
@@ -983,15 +1061,15 @@ R.prototype.search = function(a, c, b, e) {
   u = [];
   for (let x = 0, r; x < f.length; x++) {
     r = d[x];
-    g && r.length && !r[0].doc && (r = S.call(this, r));
+    g && r.length && !r[0].doc && (r = W.call(this, r));
     if (y) {
-      return p ? r : new U(r);
+      return p ? r : new X(r);
     }
     d[x] = {field:f[x], result:r};
   }
-  return h ? Ea(d, c) : q ? Fa(d, a, this.index, this.field, this.C, q) : d;
+  return h ? Ja(d, c) : q ? Ka(d, a, this.index, this.field, this.C, q) : d;
 };
-function Fa(a, c, b, e, d, f) {
+function Ka(a, c, b, e, d, f) {
   let g, h, k;
   for (let m = 0, n, t, p, q, y; m < a.length; m++) {
     n = a[m].result;
@@ -1006,21 +1084,21 @@ function Fa(a, c, b, e, d, f) {
       var l = J(n[u].doc, y);
       let z = g.encode(l);
       l = l.split(g.split);
-      for (let x = 0, r, D; x < z.length; x++) {
+      for (let x = 0, r, E; x < z.length; x++) {
         r = z[x];
-        D = l[x];
+        E = l[x];
         let F;
         for (let B = 0, G; B < h.length; B++) {
           if (G = h[B], "strict" === k) {
             if (r === G) {
-              v += (v ? " " : "") + f.replace("$1", D);
+              v += (v ? " " : "") + f.replace("$1", E);
               F = !0;
               break;
             }
           } else {
-            const H = r.indexOf(G);
-            if (-1 < H) {
-              v += (v ? " " : "") + D.substring(0, H) + f.replace("$1", D.substring(H, G.length)) + D.substring(H + G.length);
+            const I = r.indexOf(G);
+            if (-1 < I) {
+              v += (v ? " " : "") + E.substring(0, I) + f.replace("$1", E.substring(I, G.length)) + E.substring(I + G.length);
               F = !0;
               break;
             }
@@ -1033,7 +1111,7 @@ function Fa(a, c, b, e, d, f) {
   }
   return a;
 }
-function Ea(a, c) {
+function Ja(a, c) {
   const b = [], e = C();
   for (let d = 0, f, g; d < a.length; d++) {
     f = a[d];
@@ -1052,7 +1130,7 @@ function Ea(a, c) {
   }
   return b;
 }
-function Da(a, c, b, e, d) {
+function Ia(a, c, b, e, d) {
   let f = this.tag.get(a);
   if (!f) {
     return console.warn("Tag '" + a + "' was not found"), [];
@@ -1061,11 +1139,11 @@ function Da(a, c, b, e, d) {
     if (a > b || e) {
       f = f.slice(e, e + b);
     }
-    d && (f = S.call(this, f));
+    d && (f = W.call(this, f));
     return f;
   }
 }
-function S(a) {
+function W(a) {
   if (!this || !this.store) {
     return a;
   }
@@ -1075,32 +1153,32 @@ function S(a) {
   }
   return c;
 }
-;function R(a) {
-  if (!this || this.constructor !== R) {
-    return new R(a);
+;function V(a) {
+  if (!this || this.constructor !== V) {
+    return new V(a);
   }
   const c = a.document || a.doc || a;
   var b;
   this.C = [];
   this.field = [];
   this.J = [];
-  this.key = (b = c.key || c.id) && V(b, this.J) || "id";
+  this.key = (b = c.key || c.id) && La(b, this.J) || "id";
   this.reg = (this.fastupdate = !!a.fastupdate) ? new Map() : new Set();
   this.A = (b = c.store || null) && b && !0 !== b && [];
   this.store = b && new Map();
-  this.cache = (b = a.cache || null) && new W(b);
+  this.cache = (b = a.cache || null) && new Y(b);
   a.cache = !1;
   b = new Map();
   let e = c.index || c.field || c;
-  E(e) && (e = [e]);
+  D(e) && (e = [e]);
   for (let d = 0, f, g; d < e.length; d++) {
-    f = e[d], E(f) || (g = f, f = f.field), g = I(g) ? Object.assign({}, a, g) : a, b.set(f, new X(g, this.reg)), g.custom ? this.C[d] = g.custom : (this.C[d] = V(f, this.J), g.filter && ("string" === typeof this.C[d] && (this.C[d] = new String(this.C[d])), this.C[d].I = g.filter)), this.field[d] = f;
+    f = e[d], D(f) || (g = f, f = f.field), g = H(g) ? Object.assign({}, a, g) : a, b.set(f, new O(g, this.reg)), g.custom ? this.C[d] = g.custom : (this.C[d] = La(f, this.J), g.filter && ("string" === typeof this.C[d] && (this.C[d] = new String(this.C[d])), this.C[d].I = g.filter)), this.field[d] = f;
   }
   if (this.A) {
     a = c.store;
-    E(a) && (a = [a]);
+    D(a) && (a = [a]);
     for (let d = 0, f, g; d < a.length; d++) {
-      f = a[d], g = f.field || f, f.custom ? (this.A[d] = f.custom, f.custom.U = g) : (this.A[d] = V(g, this.J), f.filter && ("string" === typeof this.A[d] && (this.A[d] = new String(this.A[d])), this.A[d].I = f.filter));
+      f = a[d], g = f.field || f, f.custom ? (this.A[d] = f.custom, f.custom.U = g) : (this.A[d] = La(g, this.J), f.filter && ("string" === typeof this.A[d] && (this.A[d] = new String(this.A[d])), this.A[d].I = f.filter));
     }
   }
   this.index = b;
@@ -1116,14 +1194,14 @@ function S(a) {
         if (!g) {
           throw Error("The tag field from the document descriptor is undefined.");
         }
-        f.custom ? this.B[d] = f.custom : (this.B[d] = V(g, this.J), f.filter && ("string" === typeof this.B[d] && (this.B[d] = new String(this.B[d])), this.B[d].I = f.filter));
+        f.custom ? this.B[d] = f.custom : (this.B[d] = La(g, this.J), f.filter && ("string" === typeof this.B[d] && (this.B[d] = new String(this.B[d])), this.B[d].I = f.filter));
         this.T[d] = g;
         this.tag.set(g, new Map());
       }
     }
   }
 }
-function V(a, c) {
+function La(a, c) {
   const b = a.split(":");
   let e = 0;
   for (let d = 0; d < b.length; d++) {
@@ -1132,7 +1210,7 @@ function V(a, c) {
   e < b.length && (b.length = e);
   return 1 < e ? b : b[0];
 }
-w = R.prototype;
+w = V.prototype;
 w.append = function(a, c) {
   return this.add(a, c, !0);
 };
@@ -1140,7 +1218,7 @@ w.update = function(a, c) {
   return this.remove(a).add(a, c);
 };
 w.remove = function(a) {
-  I(a) && (a = J(a, this.key));
+  H(a) && (a = J(a, this.key));
   for (var c of this.index.values()) {
     c.remove(a, !0);
   }
@@ -1188,7 +1266,7 @@ w.set = function(a, c) {
   this.store.set(a, c);
   return this;
 };
-w.searchCache = Ga;
+w.searchCache = Ma;
 w.export = function(a, c, b = 0, e = 0) {
   if (b < this.field.length) {
     const g = this.field[b];
@@ -1204,17 +1282,17 @@ w.export = function(a, c, b = 0, e = 0) {
   switch(e) {
     case 0:
       d = "reg";
-      f = pa(this.reg);
+      f = sa(this.reg);
       c = null;
       break;
     case 1:
       d = "tag";
-      f = na(this.tag, this.reg.size);
+      f = qa(this.tag, this.reg.size);
       c = null;
       break;
     case 2:
       d = "doc";
-      f = la(this.store);
+      f = oa(this.store);
       c = null;
       break;
     case 3:
@@ -1224,7 +1302,7 @@ w.export = function(a, c, b = 0, e = 0) {
     default:
       return;
   }
-  return Q.call(this, a, c, d, f, b, e);
+  return ua.call(this, a, c, d, f, b, e);
 };
 w.import = function(a, c) {
   if (c) {
@@ -1239,23 +1317,23 @@ w.import = function(a, c) {
     switch(a) {
       case "reg":
         this.fastupdate = !1;
-        this.reg = qa(c, this.reg);
+        this.reg = ta(c, this.reg);
         for (let e = 0, d; e < this.field.length; e++) {
           d = this.index.get(this.field[e]), d.fastupdate = !1, d.reg = this.reg;
         }
         break;
       case "tag":
-        this.tag = oa(c, this.tag);
+        this.tag = ra(c, this.tag);
         break;
       case "doc":
-        this.store = ma(c, this.store);
+        this.store = pa(c, this.store);
     }
   }
 };
-ia(R.prototype);
-function Ga(a, c, b) {
+ja(V.prototype);
+function Ma(a, c, b) {
   a = ("object" === typeof a ? "" + a.query : a).toLowerCase();
-  this.cache || (this.cache = new W());
+  this.cache || (this.cache = new Y());
   let e = this.cache.get(a);
   if (!e) {
     e = this.search(a, c, b);
@@ -1270,56 +1348,56 @@ function Ga(a, c, b) {
   }
   return e;
 }
-function W(a) {
+function Y(a) {
   this.limit = a && !0 !== a ? a : 1000;
   this.cache = new Map();
   this.h = "";
 }
-W.prototype.set = function(a, c) {
+Y.prototype.set = function(a, c) {
   this.cache.set(this.h = a, c);
   this.cache.size > this.limit && this.cache.delete(this.cache.keys().next().value);
 };
-W.prototype.get = function(a) {
+Y.prototype.get = function(a) {
   const c = this.cache.get(a);
   c && this.h !== a && (this.cache.delete(a), this.cache.set(this.h = a, c));
   return c;
 };
-W.prototype.remove = function(a) {
+Y.prototype.remove = function(a) {
   for (const c of this.cache) {
     const b = c[0];
     c[1].includes(a) && this.cache.delete(b);
   }
 };
-W.prototype.clear = function() {
+Y.prototype.clear = function() {
   this.cache.clear();
   this.h = "";
 };
-const Ha = {normalize:function(a) {
+const Na = {normalize:function(a) {
   return a.toLowerCase();
 }};
-const Ia = new Map([["b", "p"], ["v", "f"], ["w", "f"], ["z", "s"], ["x", "s"], ["d", "t"], ["n", "m"], ["c", "k"], ["g", "k"], ["j", "k"], ["q", "k"], ["i", "e"], ["y", "e"], ["u", "o"]]);
-const Ja = new Map([["ae", "a"], ["oe", "o"], ["sh", "s"], ["kh", "k"], ["th", "t"], ["pf", "f"]]), Ka = [/([^aeo])h(.)/g, "$1$2", /([aeo])h([^aeo]|$)/g, "$1$2", /([^0-9])\1+/g, "$1"];
-const La = {a:"", e:"", i:"", o:"", u:"", y:"", b:1, f:1, p:1, v:1, c:2, g:2, j:2, k:2, q:2, s:2, x:2, z:2, "\u00df":2, d:3, t:3, l:4, m:5, n:5, r:6};
-const Ma = /[\x00-\x7F]+/g;
-const Na = /[\x00-\x7F]+/g;
-const Oa = /[\x00-\x7F]+/g;
-var Pa = {LatinExact:{normalize:!1, dedupe:!1}, LatinDefault:Ha, LatinSimple:{normalize:!0, dedupe:!0}, LatinBalance:{normalize:!0, dedupe:!0, mapper:Ia}, LatinAdvanced:{normalize:!0, dedupe:!0, mapper:Ia, matcher:Ja, replacer:Ka}, LatinExtra:{normalize:!0, dedupe:!0, mapper:Ia, replacer:Ka.concat([/(?!^)[aeo]/g, ""]), matcher:Ja}, LatinSoundex:{normalize:!0, dedupe:!1, include:{letter:!0}, finalize:function(a) {
+const Oa = new Map([["b", "p"], ["v", "f"], ["w", "f"], ["z", "s"], ["x", "s"], ["d", "t"], ["n", "m"], ["c", "k"], ["g", "k"], ["j", "k"], ["q", "k"], ["i", "e"], ["y", "e"], ["u", "o"]]);
+const Pa = new Map([["ae", "a"], ["oe", "o"], ["sh", "s"], ["kh", "k"], ["th", "t"], ["pf", "f"]]), Qa = [/([^aeo])h(.)/g, "$1$2", /([aeo])h([^aeo]|$)/g, "$1$2", /([^0-9])\1+/g, "$1"];
+const Ra = {a:"", e:"", i:"", o:"", u:"", y:"", b:1, f:1, p:1, v:1, c:2, g:2, j:2, k:2, q:2, s:2, x:2, z:2, "\u00df":2, d:3, t:3, l:4, m:5, n:5, r:6};
+const Sa = /[\x00-\x7F]+/g;
+const Ta = /[\x00-\x7F]+/g;
+const Ua = /[\x00-\x7F]+/g;
+var Va = {LatinExact:{normalize:!1, dedupe:!1}, LatinDefault:Na, LatinSimple:{normalize:!0, dedupe:!0}, LatinBalance:{normalize:!0, dedupe:!0, mapper:Oa}, LatinAdvanced:{normalize:!0, dedupe:!0, mapper:Oa, matcher:Pa, replacer:Qa}, LatinExtra:{normalize:!0, dedupe:!0, mapper:Oa, replacer:Qa.concat([/(?!^)[aeo]/g, ""]), matcher:Pa}, LatinSoundex:{normalize:!0, dedupe:!1, include:{letter:!0}, finalize:function(a) {
   for (let b = 0; b < a.length; b++) {
     var c = a[b];
-    let e = c.charAt(0), d = La[e];
-    for (let f = 1, g; f < c.length && (g = c.charAt(f), "h" === g || "w" === g || !(g = La[g]) || g === d || (e += g, d = g, 4 !== e.length)); f++) {
+    let e = c.charAt(0), d = Ra[e];
+    for (let f = 1, g; f < c.length && (g = c.charAt(f), "h" === g || "w" === g || !(g = Ra[g]) || g === d || (e += g, d = g, 4 !== e.length)); f++) {
     }
     a[b] = e;
   }
 }}, ArabicDefault:{rtl:!0, normalize:!1, dedupe:!0, prepare:function(a) {
-  return ("" + a).replace(Ma, " ");
+  return ("" + a).replace(Sa, " ");
 }}, CjkDefault:{normalize:!1, dedupe:!0, split:"", prepare:function(a) {
-  return ("" + a).replace(Na, "");
+  return ("" + a).replace(Ta, "");
 }}, CyrillicDefault:{normalize:!1, dedupe:!0, prepare:function(a) {
-  return ("" + a).replace(Oa, " ");
+  return ("" + a).replace(Ua, " ");
 }}};
-const Ra = {memory:{resolution:1}, performance:{resolution:6, fastupdate:!0, context:{depth:1, resolution:3}}, match:{tokenize:"forward"}, score:{resolution:9, context:{depth:2, resolution:9}}};
-X.prototype.add = function(a, c, b, e) {
+const Wa = {memory:{resolution:1}, performance:{resolution:6, fastupdate:!0, context:{depth:1, resolution:3}}, match:{tokenize:"forward"}, score:{resolution:9, context:{depth:2, resolution:9}}};
+O.prototype.add = function(a, c, b, e) {
   if (c && (a || 0 === a)) {
     if (!e && !b && this.reg.has(a)) {
       return this.update(a, c);
@@ -1331,14 +1409,14 @@ X.prototype.add = function(a, c, b, e) {
         let q = c[this.rtl ? e - 1 - p : p];
         var d = q.length;
         if (d && (n || !m[q])) {
-          var f = this.score ? this.score(c, q, p, null, 0) : Y(t, e, p), g = "";
+          var f = this.score ? this.score(c, q, p, null, 0) : Ya(t, e, p), g = "";
           switch(this.tokenize) {
             case "full":
               if (2 < d) {
                 for (f = 0; f < d; f++) {
                   for (var h = d; h > f; h--) {
                     g = q.substring(f, h);
-                    var k = this.score ? this.score(c, q, p, g, f) : Y(t, e, p, d, f);
+                    var k = this.score ? this.score(c, q, p, g, f) : Ya(t, e, p, d, f);
                     Z(this, m, g, k, a, b);
                   }
                 }
@@ -1347,7 +1425,7 @@ X.prototype.add = function(a, c, b, e) {
             case "reverse":
               if (1 < d) {
                 for (h = d - 1; 0 < h; h--) {
-                  g = q[h] + g, k = this.score ? this.score(c, q, p, g, h) : Y(t, e, p, d, h), Z(this, m, g, k, a, b);
+                  g = q[h] + g, k = this.score ? this.score(c, q, p, g, h) : Ya(t, e, p, d, h), Z(this, m, g, k, a, b);
                 }
                 g = "";
               }
@@ -1363,7 +1441,7 @@ X.prototype.add = function(a, c, b, e) {
                 for (d = C(), g = this.S, f = q, h = Math.min(n + 1, e - p), d[f] = 1, k = 1; k < h; k++) {
                   if ((q = c[this.rtl ? e - 1 - p - k : p + k]) && !d[q]) {
                     d[q] = 1;
-                    const y = this.score ? this.score(c, f, p, q, k) : Y(g + (e / 2 > g ? 0 : 1), e, p, h - 1, k - 1), u = this.bidirectional && q > f;
+                    const y = this.score ? this.score(c, f, p, q, k) : Ya(g + (e / 2 > g ? 0 : 1), e, p, h - 1, k - 1), u = this.bidirectional && q > f;
                     Z(this, l, u ? f : q, y, a, b, u ? q : f);
                   }
                 }
@@ -1382,11 +1460,11 @@ function Z(a, c, b, e, d, f, g) {
     g ? (c = k || (c[b] = C()), c[g] = 1, (k = h.get(g)) ? h = k : h.set(g, h = new Map())) : c[b] = 1, (k = h.get(b)) ? h = k : h.set(b, h = []), h = h[e] || (h[e] = []), f && h.includes(d) || (h.push(d), a.fastupdate && ((c = a.reg.get(d)) ? c.push(h) : a.reg.set(d, [h])));
   }
 }
-function Y(a, c, b, e, d) {
+function Ya(a, c, b, e, d) {
   return b && 1 < a ? c + (e || 0) <= a ? b + (d || 0) : (a - 1) / (c + (e || 0)) * (b + (d || 0)) + 1 | 0 : 0;
 }
-;X.prototype.search = function(a, c, b) {
-  b || (!c && I(a) ? (b = a, a = "") : I(c) && (b = c, c = 0));
+;O.prototype.search = function(a, c, b) {
+  b || (!c && H(a) ? (b = a, a = "") : H(c) && (b = c, c = 0));
   var e = [], d = 0;
   if (b) {
     a = b.query || a;
@@ -1403,11 +1481,11 @@ function Y(a, c, b, e, d) {
   a = b.length;
   c = c || (h ? 100 : 0);
   if (1 === a) {
-    return Sa.call(this, b[0], "", c, d, h);
+    return Za.call(this, b[0], "", c, d, h);
   }
   f = this.depth && !1 !== f;
   if (2 === a && f && !g) {
-    return Sa.call(this, b[0], b[1], c, d, h);
+    return Za.call(this, b[0], b[1], c, d, h);
   }
   h = C();
   let l = 0;
@@ -1419,7 +1497,7 @@ function Y(a, c, b, e, d) {
   for (let q, y; l < a; l++) {
     if ((y = b[l]) && !h[y]) {
       h[y] = 1;
-      q = Ta(this, y, m);
+      q = $a(this, y, m);
       a: {
         f = q;
         var n = e, t = g, p = k;
@@ -1455,27 +1533,27 @@ function Y(a, c, b, e, d) {
     m = e.length;
     a = e;
     if (1 < m) {
-      a = ta(e, k, c, d, g);
+      a = xa(e, k, c, d, g);
     } else if (1 === m) {
-      g = wa.call(null, e[0], c, d);
+      g = Aa.call(null, e[0], c, d);
       break a;
     }
     g = a;
   }
   return g;
 };
-function Sa(a, c, b, e, d) {
-  a = Ta(this, a, c);
+function Za(a, c, b, e, d) {
+  a = $a(this, a, c);
   d = !0;
-  return a && a.length ? d ? wa.call(this, a, b, e) : new U(a) : d ? [] : new U();
+  return a && a.length ? d ? Aa.call(this, a, b, e) : new X(a) : d ? [] : new X();
 }
-function Ta(a, c, b) {
+function $a(a, c, b) {
   let e;
   b && (e = a.bidirectional && c > b) && (e = b, b = c, c = e);
   a = b ? (a = a.ctx.get(b)) && a.get(c) : a.map.get(c);
   return a;
 }
-;X.prototype.remove = function(a, c) {
+;O.prototype.remove = function(a, c) {
   const b = this.reg.size && (this.fastupdate ? this.reg.get(a) : this.reg.has(a));
   if (b) {
     if (this.fastupdate) {
@@ -1490,14 +1568,14 @@ function Ta(a, c, b) {
         }
       }
     } else {
-      Ua(this.map, a), this.depth && Ua(this.ctx, a);
+      ab(this.map, a), this.depth && ab(this.ctx, a);
     }
     c || this.reg.delete(a);
   }
   this.cache && this.cache.remove(a);
   return this;
 };
-function Ua(a, c) {
+function ab(a, c) {
   let b = 0;
   if (a.constructor === Array) {
     for (let e = 0, d, f; e < a.length; e++) {
@@ -1512,24 +1590,24 @@ function Ua(a, c) {
     }
   } else {
     for (let e of a.entries()) {
-      const d = e[0], f = Ua(e[1], c);
+      const d = e[0], f = ab(e[1], c);
       f ? b += f : a.delete(d);
     }
   }
   return b;
 }
-;function X(a, c) {
-  if (!this || this.constructor !== X) {
-    return new X(a);
+;function O(a, c) {
+  if (!this || this.constructor !== O) {
+    return new O(a);
   }
   if (a) {
-    var b = E(a) ? a : a.preset;
-    b && (Ra[b] || console.warn("Preset not found: " + b), a = Object.assign({}, Ra[b], a));
+    var b = D(a) ? a : a.preset;
+    b && (Wa[b] || console.warn("Preset not found: " + b), a = Object.assign({}, Wa[b], a));
   } else {
     a = {};
   }
   b = a.context;
-  const e = !0 === b ? {depth:1} : b || {}, d = E(a.encoder) ? Pa[a.encoder] : a.encode || a.encoder || Ha;
+  const e = !0 === b ? {depth:1} : b || {}, d = D(a.encoder) ? Va[a.encoder] : a.encode || a.encoder || Na;
   this.encoder = d.encode ? d : "object" === typeof d ? new K(d) : {encode:d};
   this.resolution = a.resolution || 9;
   this.tokenize = b = a.tokenize || "strict";
@@ -1543,10 +1621,10 @@ function Ua(a, c) {
   this.reg = c || (this.fastupdate ? new Map() : new Set());
   this.S = e.resolution || 3;
   this.rtl = d.rtl || a.rtl || !1;
-  this.cache = (b = a.cache || null) && new W(b);
+  this.cache = (b = a.cache || null) && new Y(b);
   this.priority = a.priority || 4;
 }
-w = X.prototype;
+w = O.prototype;
 w.clear = function() {
   this.map.clear();
   this.ctx.clear();
@@ -1564,7 +1642,7 @@ w.update = function(a, c) {
   const b = this, e = this.remove(a);
   return e && e.then ? e.then(() => b.add(a, c)) : this.add(a, c);
 };
-function Va(a) {
+function bb(a) {
   let c = 0;
   if (a.constructor === Array) {
     for (let b = 0, e; b < a.length; b++) {
@@ -1572,7 +1650,7 @@ function Va(a) {
     }
   } else {
     for (const b of a) {
-      const e = b[0], d = Va(b[1]);
+      const e = b[0], d = bb(b[1]);
       d ? c += d : a.delete(e);
     }
   }
@@ -1582,17 +1660,17 @@ w.cleanup = function() {
   if (!this.fastupdate) {
     return console.info('Cleanup the index isn\'t required when not using "fastupdate".'), this;
   }
-  Va(this.map);
-  this.depth && Va(this.ctx);
+  bb(this.map);
+  this.depth && bb(this.ctx);
   return this;
 };
-w.searchCache = Ga;
+w.searchCache = Ma;
 w.export = function(a, c, b = 0, e = 0) {
   let d, f;
   switch(e) {
     case 0:
       d = "reg";
-      f = pa(this.reg);
+      f = sa(this.reg);
       break;
     case 1:
       d = "cfg";
@@ -1600,29 +1678,29 @@ w.export = function(a, c, b = 0, e = 0) {
       break;
     case 2:
       d = "map";
-      f = la(this.map, this.reg.size);
+      f = oa(this.map, this.reg.size);
       break;
     case 3:
       d = "ctx";
-      f = na(this.ctx, this.reg.size);
+      f = qa(this.ctx, this.reg.size);
       break;
     default:
       return;
   }
-  return Q.call(this, a, c, d, f, b, e);
+  return ua.call(this, a, c, d, f, b, e);
 };
 w.import = function(a, c) {
   if (c) {
     switch("string" === typeof c && (c = JSON.parse(c)), a = a.split("."), "json" === a[a.length - 1] && a.pop(), a = 1 < a.length ? a[1] : a[0], a) {
       case "reg":
         this.fastupdate = !1;
-        this.reg = qa(c, this.reg);
+        this.reg = ta(c, this.reg);
         break;
       case "map":
-        this.map = ma(c, this.map);
+        this.map = pa(c, this.map);
         break;
       case "ctx":
-        this.ctx = oa(c, this.ctx);
+        this.ctx = ra(c, this.ctx);
     }
   }
 };
@@ -1676,7 +1754,7 @@ w.serialize = function(a = !0) {
   d = "index.ctx=new Map([" + d + "]);";
   return a ? "function inject(index){" + c + e + d + "}" : c + e + d;
 };
-ia(X.prototype);
-export default {Index:X, Charset:Pa, Encoder:K, Document:R, Worker:null, Resolver:null, IndexedDB:null, Language:{}};
+ja(O.prototype);
+export default {Index:O, Charset:Va, Encoder:K, Document:V, Worker:null, Resolver:null, IndexedDB:null, Language:{}};
 
-export const Index=X;export const  Charset=Pa;export const  Encoder=K;export const  Document=R;export const  Worker=null;export const  Resolver=null;export const  IndexedDB=null;export const  Language={};
\ No newline at end of file
+export const Index=O;export const  Charset=Va;export const  Encoder=K;export const  Document=V;export const  Worker=null;export const  Resolver=null;export const  IndexedDB=null;export const  Language={};
\ No newline at end of file
diff --git a/dist/flexsearch.compact.module.min.js b/dist/flexsearch.compact.module.min.js
index d9a9ddf..5519abc 100644
--- a/dist/flexsearch.compact.module.min.js
+++ b/dist/flexsearch.compact.module.min.js
@@ -1,12 +1,12 @@
 /**!
- * FlexSearch.js v0.8.107 (Bundle)
+ * FlexSearch.js v0.8.108 (Bundle)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
  * https://github.com/nextapps-de/flexsearch
  */
-var v;function A(a,c,b){const e=typeof b,d=typeof a;if("undefined"!==e){if("undefined"!==d){if(b){if("function"===d&&e===d)return function(h){return a(b(h))};c=a.constructor;if(c===b.constructor){if(c===Array)return b.concat(a);if(c===Map){var f=new Map(b);for(var g of a)f.set(g[0],g[1]);return f}if(c===Set){g=new Set(b);for(f of a.values())g.add(f);return g}}}return a}return b}return"undefined"===d?c:a}function C(){return Object.create(null)}function E(a){return"string"===typeof a}
-function H(a){return"object"===typeof a}function J(a,c){if(E(c))a=a[c];else for(let b=0;a&&b<c.length;b++)a=a[c[b]];return a}function aa(a){let c=0;for(let b=0,e;b<a.length;b++)(e=a[b])&&c<e.length&&(c=e.length);return c};var ba=[["\u00aa","a"],["\u00b2","2"],["\u00b3","3"],["\u00b9","1"],["\u00ba","o"],["\u00bc","1\u20444"],["\u00bd","1\u20442"],["\u00be","3\u20444"],["\u00e0","a"],["\u00e1","a"],["\u00e2","a"],["\u00e3","a"],["\u00e4","a"],["\u00e5","a"],["\u00e7","c"],["\u00e8","e"],["\u00e9","e"],["\u00ea","e"],["\u00eb","e"],["\u00ec","i"],["\u00ed","i"],["\u00ee","i"],["\u00ef","i"],["\u00f1","n"],["\u00f2","o"],["\u00f3","o"],["\u00f4","o"],["\u00f5","o"],["\u00f6","o"],["\u00f9","u"],["\u00fa","u"],["\u00fb",
+var v;function A(a,c,b){const e=typeof b,d=typeof a;if("undefined"!==e){if("undefined"!==d){if(b){if("function"===d&&e===d)return function(h){return a(b(h))};c=a.constructor;if(c===b.constructor){if(c===Array)return b.concat(a);if(c===Map){var f=new Map(b);for(var g of a)f.set(g[0],g[1]);return f}if(c===Set){g=new Set(b);for(f of a.values())g.add(f);return g}}}return a}return b}return"undefined"===d?c:a}function C(){return Object.create(null)}function D(a){return"string"===typeof a}
+function H(a){return"object"===typeof a}function I(a,c){if(D(c))a=a[c];else for(let b=0;a&&b<c.length;b++)a=a[c[b]];return a}function aa(a){let c=0;for(let b=0,e;b<a.length;b++)(e=a[b])&&c<e.length&&(c=e.length);return c};var ba=[["\u00aa","a"],["\u00b2","2"],["\u00b3","3"],["\u00b9","1"],["\u00ba","o"],["\u00bc","1\u20444"],["\u00bd","1\u20442"],["\u00be","3\u20444"],["\u00e0","a"],["\u00e1","a"],["\u00e2","a"],["\u00e3","a"],["\u00e4","a"],["\u00e5","a"],["\u00e7","c"],["\u00e8","e"],["\u00e9","e"],["\u00ea","e"],["\u00eb","e"],["\u00ec","i"],["\u00ed","i"],["\u00ee","i"],["\u00ef","i"],["\u00f1","n"],["\u00f2","o"],["\u00f3","o"],["\u00f4","o"],["\u00f5","o"],["\u00f6","o"],["\u00f9","u"],["\u00fa","u"],["\u00fb",
 "u"],["\u00fc","u"],["\u00fd","y"],["\u00ff","y"],["\u0101","a"],["\u0103","a"],["\u0105","a"],["\u0107","c"],["\u0109","c"],["\u010b","c"],["\u010d","c"],["\u010f","d"],["\u0113","e"],["\u0115","e"],["\u0117","e"],["\u0119","e"],["\u011b","e"],["\u011d","g"],["\u011f","g"],["\u0121","g"],["\u0123","g"],["\u0125","h"],["\u0129","i"],["\u012b","i"],["\u012d","i"],["\u012f","i"],["\u0133","ij"],["\u0135","j"],["\u0137","k"],["\u013a","l"],["\u013c","l"],["\u013e","l"],["\u0140","l"],["\u0144","n"],
 ["\u0146","n"],["\u0148","n"],["\u0149","n"],["\u014d","o"],["\u014f","o"],["\u0151","o"],["\u0155","r"],["\u0157","r"],["\u0159","r"],["\u015b","s"],["\u015d","s"],["\u015f","s"],["\u0161","s"],["\u0163","t"],["\u0165","t"],["\u0169","u"],["\u016b","u"],["\u016d","u"],["\u016f","u"],["\u0171","u"],["\u0173","u"],["\u0175","w"],["\u0177","y"],["\u017a","z"],["\u017c","z"],["\u017e","z"],["\u017f","s"],["\u01a1","o"],["\u01b0","u"],["\u01c6","dz"],["\u01c9","lj"],["\u01cc","nj"],["\u01ce","a"],["\u01d0",
 "i"],["\u01d2","o"],["\u01d4","u"],["\u01d6","u"],["\u01d8","u"],["\u01da","u"],["\u01dc","u"],["\u01df","a"],["\u01e1","a"],["\u01e3","ae"],["\u00e6","ae"],["\u01fd","ae"],["\u01e7","g"],["\u01e9","k"],["\u01eb","o"],["\u01ed","o"],["\u01ef","\u0292"],["\u01f0","j"],["\u01f3","dz"],["\u01f5","g"],["\u01f9","n"],["\u01fb","a"],["\u01ff","\u00f8"],["\u0201","a"],["\u0203","a"],["\u0205","e"],["\u0207","e"],["\u0209","i"],["\u020b","i"],["\u020d","o"],["\u020f","o"],["\u0211","r"],["\u0213","r"],["\u0215",
@@ -21,46 +21,51 @@ v.addMatcher=function(a,c){if("object"===typeof a)return this.addReplacer(a,c);i
 v.encode=function(a){if(this.cache&&a.length<=this.K)if(this.H){if(this.F.has(a))return this.F.get(a)}else this.H=setTimeout(L,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,"$1 "));const c=!(this.dedupe||this.mapper||this.filter||this.matcher||this.stemmer||this.replacer);let b=
 [],e=this.split||""===this.split?a.split(this.split):a;for(let f=0,g,h;f<e.length;f++)if((g=h=e[f])&&!(g.length<this.minlength))if(c)b.push(g);else if(!this.filter||!this.filter.has(g)){if(this.cache&&g.length<=this.L)if(this.H){var d=this.G.get(g);if(d||""===d){d&&b.push(d);continue}}else this.H=setTimeout(L,50,this);this.stemmer&&2<g.length&&(this.N||(this.N=new RegExp("(?!^)("+this.D+")$")),g=g.replace(this.N,k=>this.stemmer.get(k)),g.length<this.minlength||this.filter&&this.filter.has(g))&&(g=
 "");if(g&&(this.mapper||this.dedupe&&1<g.length)){d="";for(let k=0,l="",m,n;k<g.length;k++)m=g.charAt(k),m===l&&this.dedupe||((n=this.mapper&&this.mapper.get(m))||""===n?n===l&&this.dedupe||!(l=n)||(d+=n):d+=l=m);g=d}this.matcher&&1<g.length&&(this.M||(this.M=new RegExp("("+this.h+")","g")),g=g.replace(this.M,k=>this.matcher.get(k)));if(g&&this.replacer)for(d=0;g&&d<this.replacer.length;d+=2)g=g.replace(this.replacer[d],this.replacer[d+1]);this.cache&&h.length<=this.L&&(this.G.set(h,g),this.G.size>
-this.R&&(this.G.clear(),this.L=this.L/1.1|0));g&&b.push(g)}this.finalize&&(b=this.finalize(b)||b);this.cache&&a.length<=this.K&&(this.F.set(a,b),this.F.size>this.R&&(this.F.clear(),this.K=this.K/1.1|0));return b};function L(a){a.H=null;a.F.clear();a.G.clear()};function ia(a){M.call(a,"add");M.call(a,"append");M.call(a,"search");M.call(a,"update");M.call(a,"remove")}let N,ja;const O={},P={};function ka(a){N=0;O[a]=P[a]}
-function M(a){this[a+"Async"]=function(){const c=arguments;var b=c[c.length-1];let e;"function"===typeof b&&(e=b,delete c[c.length-1]);N||(N=setTimeout(ka,0,a),ja=Date.now());P[a]||(P[a]=O[a]=1E3);if(!--O[a]){O[a]=P[a]=P[a]*this.priority*this.priority*3/(Date.now()-ja)|0||1;N=clearTimeout(N);const f=this;return new Promise(g=>{setTimeout(function(){g(f[a+"Async"].apply(f,c))},0)})}const d=this[a].apply(this,c);b=d.then?d:new Promise(f=>f(d));e&&b.then(e);return b}};function la(a,c=0){let b=[],e=[];c&&(c=25E4/c*5E3|0);for(const d of a.entries())e.push(d),e.length===c&&(b.push(e),e=[]);e.length&&b.push(e);return b}function ma(a,c){c||(c=new Map);for(let b=0,e;b<a.length;b++)e=a[b],c.set(e[0],e[1]);return c}function na(a,c=0){let b=[],e=[];c&&(c=25E4/c*1E3|0);for(const d of a.entries())e.push([d[0],la(d[1])[0]]),e.length===c&&(b.push(e),e=[]);e.length&&b.push(e);return b}
-function oa(a,c){c||(c=new Map);for(let b=0,e,d;b<a.length;b++)e=a[b],d=c.get(e[0]),c.set(e[0],ma(e[1],d));return c}function pa(a){let c=[],b=[];for(const e of a.keys())b.push(e),25E4===b.length&&(c.push(b),b=[]);b.length&&c.push(b);return c}function qa(a,c){c||(c=new Set);for(let b=0;b<a.length;b++)c.add(a[b]);return c}
-function Q(a,c,b,e,d,f,g=0){const h=e&&e.constructor===Array;var k=h?e.shift():e;if(!k)return this.export(a,c,d,f+1);if((k=a((c?c+".":"")+(g+1)+"."+b,JSON.stringify(k)))&&k.then){const l=this;return k.then(function(){return Q.call(l,a,c,b,h?e:null,d,f,g+1)})}return Q.call(this,a,c,b,h?e:null,d,f,g+1)};R.prototype.add=function(a,c,b){H(a)&&(c=a,a=J(c,this.key));if(c&&(a||0===a)){if(!b&&this.reg.has(a))return this.update(a,c);for(let h=0,k;h<this.field.length;h++){k=this.C[h];var e=this.index.get(this.field[h]);if("function"===typeof k){var d=k(c);d&&e.add(a,d,!1,!0)}else if(d=k.I,!d||d(c))k.constructor===String?k=[""+k]:E(k)&&(k=[k]),ra(c,k,this.J,0,e,a,k[0],b)}if(this.tag)for(e=0;e<this.B.length;e++){var f=this.B[e];d=this.tag.get(this.T[e]);let h=C();if("function"===typeof f){if(f=f(c),!f)continue}else{var g=
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+function W(a){if(!this||!this.store)return a;const c=Array(a.length);for(let b=0,e;b<a.length;b++)e=a[b],c[b]={id:e,doc:this.store.get(e)};return c};function V(a){if(!this||this.constructor!==V)return new V(a);const c=a.document||a.doc||a;var b;this.C=[];this.field=[];this.J=[];this.key=(b=c.key||c.id)&&La(b,this.J)||"id";this.reg=(this.fastupdate=!!a.fastupdate)?new Map:new Set;this.A=(b=c.store||null)&&b&&!0!==b&&[];this.store=b&&new Map;this.cache=(b=a.cache||null)&&new Y(b);a.cache=!1;b=new Map;let e=c.index||c.field||c;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=H(g)?Object.assign({},a,g):a,b.set(f,new O(g,
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+function La(a,c){const b=a.split(":");let e=0;for(let d=0;d<b.length;d++)a=b[d],"]"===a[a.length-1]&&(a=a.substring(0,a.length-2))&&(c[e]=!0),a&&(b[e++]=a);e<b.length&&(b.length=e);return 1<e?b:b[0]}v=V.prototype;v.append=function(a,c){return this.add(a,c,!0)};v.update=function(a,c){return this.remove(a).add(a,c)};
+v.remove=function(a){H(a)&&(a=I(a,this.key));for(var c of this.index.values())c.remove(a,!0);if(this.reg.has(a)){if(this.tag&&!this.fastupdate)for(let b of this.tag.values())for(let e of b){c=e[0];const d=e[1],f=d.indexOf(a);-1<f&&(1<d.length?d.splice(f,1):b.delete(c))}this.store&&this.store.delete(a);this.reg.delete(a)}this.cache&&this.cache.remove(a);return this};
+v.clear=function(){for(const a of this.index.values())a.clear();if(this.tag)for(const a of this.tag.values())a.clear();this.store&&this.store.clear();return this};v.contain=function(a){return this.reg.has(a)};v.cleanup=function(){for(const a of this.index.values())a.cleanup();return this};v.get=function(a){return this.store.get(a)};v.set=function(a,c){this.store.set(a,c);return this};v.searchCache=Ma;
+v.export=function(a,c,b=0,e=0){if(b<this.field.length){const g=this.field[b];if((c=this.index.get(g).export(a,g,b,e=1))&&c.then){const h=this;return c.then(function(){return h.export(a,g,b+1)})}return this.export(a,g,b+1)}let d,f;switch(e){case 0:d="reg";f=sa(this.reg);c=null;break;case 1:d="tag";f=qa(this.tag,this.reg.size);c=null;break;case 2:d="doc";f=oa(this.store);c=null;break;case 3:d="cfg";c=f=null;break;default:return}return ua.call(this,a,c,d,f,b,e)};
+v.import=function(a,c){if(c){"string"===typeof c&&(c=JSON.parse(c));a=a.split(".");"json"===a[a.length-1]&&a.pop();var b=2<a.length?a[0]:"";a=2<a.length?a[2]:a[1];if(b)return this.index.get(b).import(a,c);switch(a){case "reg":this.fastupdate=!1;this.reg=ta(c,this.reg);for(let e=0,d;e<this.field.length;e++)d=this.index.get(this.field[e]),d.fastupdate=!1,d.reg=this.reg;break;case "tag":this.tag=ra(c,this.tag);break;case "doc":this.store=pa(c,this.store)}}};ja(V.prototype);function Ma(a,c,b){a=("object"===typeof a?""+a.query:a).toLowerCase();this.cache||(this.cache=new Y);let e=this.cache.get(a);if(!e){e=this.search(a,c,b);if(e.then){const d=this;e.then(function(f){d.cache.set(a,f);return f})}this.cache.set(a,e)}return e}function Y(a){this.limit=a&&!0!==a?a:1E3;this.cache=new Map;this.h=""}Y.prototype.set=function(a,c){this.cache.set(this.h=a,c);this.cache.size>this.limit&&this.cache.delete(this.cache.keys().next().value)};
+Y.prototype.get=function(a){const c=this.cache.get(a);c&&this.h!==a&&(this.cache.delete(a),this.cache.set(this.h=a,c));return c};Y.prototype.remove=function(a){for(const c of this.cache){const b=c[0];c[1].includes(a)&&this.cache.delete(b)}};Y.prototype.clear=function(){this.cache.clear();this.h=""};const Na={normalize:function(a){return a.toLowerCase()}};const Oa=new Map([["b","p"],["v","f"],["w","f"],["z","s"],["x","s"],["d","t"],["n","m"],["c","k"],["g","k"],["j","k"],["q","k"],["i","e"],["y","e"],["u","o"]]);const Pa=new Map([["ae","a"],["oe","o"],["sh","s"],["kh","k"],["th","t"],["pf","f"]]),Qa=[/([^aeo])h(.)/g,"$1$2",/([aeo])h([^aeo]|$)/g,"$1$2",/([^0-9])\1+/g,"$1"];const Ra={a:"",e:"",i:"",o:"",u:"",y:"",b:1,f:1,p:1,v:1,c:2,g:2,j:2,k:2,q:2,s:2,x:2,z:2,"\u00df":2,d:3,t:3,l:4,m:5,n:5,r:6};const Sa=/[\x00-\x7F]+/g;const Ta=/[\x00-\x7F]+/g;const Ua=/[\x00-\x7F]+/g;var Va={LatinExact:{normalize:!1,dedupe:!1},LatinDefault:Na,LatinSimple:{normalize:!0,dedupe:!0},LatinBalance:{normalize:!0,dedupe:!0,mapper:Oa},LatinAdvanced:{normalize:!0,dedupe:!0,mapper:Oa,matcher:Pa,replacer:Qa},LatinExtra:{normalize:!0,dedupe:!0,mapper:Oa,replacer:Qa.concat([/(?!^)[aeo]/g,""]),matcher:Pa},LatinSoundex:{normalize:!0,dedupe:!1,include:{letter:!0},finalize:function(a){for(let b=0;b<a.length;b++){var c=a[b];let e=c.charAt(0),d=Ra[e];for(let f=1,g;f<c.length&&(g=c.charAt(f),"h"===
+g||"w"===g||!(g=Ra[g])||g===d||(e+=g,d=g,4!==e.length));f++);a[b]=e}}},ArabicDefault:{rtl:!0,normalize:!1,dedupe:!0,prepare:function(a){return(""+a).replace(Sa," ")}},CjkDefault:{normalize:!1,dedupe:!0,split:"",prepare:function(a){return(""+a).replace(Ta,"")}},CyrillicDefault:{normalize:!1,dedupe:!0,prepare:function(a){return(""+a).replace(Ua," ")}}};const Xa={memory:{resolution:1},performance:{resolution:6,fastupdate:!0,context:{depth:1,resolution:3}},match:{tokenize:"forward"},score:{resolution:9,context:{depth:2,resolution:9}}};O.prototype.add=function(a,c,b,e){if(c&&(a||0===a)){if(!e&&!b&&this.reg.has(a))return this.update(a,c);c=this.encoder.encode(c);if(e=c.length){const l=C(),m=C(),n=this.depth,t=this.resolution;for(let p=0;p<e;p++){let q=c[this.rtl?e-1-p:p];var d=q.length;if(d&&(n||!m[q])){var f=this.score?this.score(c,q,p,null,0):Ya(t,e,p),g="";switch(this.tokenize){case "full":if(2<d){for(f=0;f<d;f++)for(var h=d;h>f;h--){g=q.substring(f,h);var k=this.score?this.score(c,q,p,g,f):Ya(t,e,p,d,f);Z(this,m,g,k,a,b)}break}case "reverse":if(1<
+d){for(h=d-1;0<h;h--)g=q[h]+g,k=this.score?this.score(c,q,p,g,h):Ya(t,e,p,d,h),Z(this,m,g,k,a,b);g=""}case "forward":if(1<d){for(h=0;h<d;h++)g+=q[h],Z(this,m,g,f,a,b);break}default:if(Z(this,m,q,f,a,b),n&&1<e&&p<e-1)for(d=C(),g=this.S,f=q,h=Math.min(n+1,e-p),d[f]=1,k=1;k<h;k++)if((q=c[this.rtl?e-1-p-k:p+k])&&!d[q]){d[q]=1;const y=this.score?this.score(c,f,p,q,k):Ya(g+(e/2>g?0:1),e,p,h-1,k-1),w=this.bidirectional&&q>f;Z(this,l,w?f:q,y,a,b,w?q:f)}}}}this.fastupdate||this.reg.add(a)}}return this};
+function Z(a,c,b,e,d,f,g){let h=g?a.ctx:a.map,k;if(!c[b]||g&&!(k=c[b])[g])g?(c=k||(c[b]=C()),c[g]=1,(k=h.get(g))?h=k:h.set(g,h=new Map)):c[b]=1,(k=h.get(b))?h=k:h.set(b,h=[]),h=h[e]||(h[e]=[]),f&&h.includes(d)||(h.push(d),a.fastupdate&&((c=a.reg.get(d))?c.push(h):a.reg.set(d,[h])))}function Ya(a,c,b,e,d){return b&&1<a?c+(e||0)<=a?b+(d||0):(a-1)/(c+(e||0))*(b+(d||0))+1|0:0};O.prototype.search=function(a,c,b){b||(!c&&H(a)?(b=a,a=""):H(c)&&(b=c,c=0));var e=[],d=0;if(b){a=b.query||a;c=b.limit||c;d=b.offset||0;var f=b.context;var g=b.suggest;var h=!0;var k=b.resolution}else h=!0;b=this.encoder.encode(a);a=b.length;c=c||(h?100:0);if(1===a)return Za.call(this,b[0],"",c,d,h);f=this.depth&&!1!==f;if(2===a&&f&&!g)return Za.call(this,b[0],b[1],c,d,h);h=C();let l=0;if(1<a&&f){var m=b[0];l=1}k||0===k||(k=m?this.S:this.resolution);for(let q,y;l<a;l++){if((y=b[l])&&!h[y]){h[y]=1;
+q=$a(this,y,m);a:{f=q;var n=e,t=g,p=k;let w=[];if(f&&f.length){if(f.length<=p){n.push(f);q=void 0;break a}for(let u=0,z;u<p;u++)if(z=f[u])w[u]=z;if(w.length){n.push(w);q=void 0;break a}}q=t?void 0:w}if(q){e=q;break}m&&(g&&q&&e.length||(m=y))}g&&m&&l===a-1&&!e.length&&(m="",l=-1,h=C())}a:{m=e.length;a=e;if(1<m)a=xa(e,k,c,d,g);else if(1===m){g=Aa.call(null,e[0],c,d);break a}g=a}return g};function Za(a,c,b,e,d){a=$a(this,a,c);d=!0;return a&&a.length?d?Aa.call(this,a,b,e):new X(a):d?[]:new X}
+function $a(a,c,b){let e;b&&(e=a.bidirectional&&c>b)&&(e=b,b=c,c=e);a=b?(a=a.ctx.get(b))&&a.get(c):a.map.get(c);return a};O.prototype.remove=function(a,c){const b=this.reg.size&&(this.fastupdate?this.reg.get(a):this.reg.has(a));if(b){if(this.fastupdate)for(let e=0,d;e<b.length;e++){if(d=b[e])if(2>d.length)d.pop();else{const f=d.indexOf(a);f===b.length-1?d.pop():d.splice(f,1)}}else ab(this.map,a),this.depth&&ab(this.ctx,a);c||this.reg.delete(a)}this.cache&&this.cache.remove(a);return this};
+function ab(a,c){let b=0;if(a.constructor===Array)for(let e=0,d,f;e<a.length;e++){if((d=a[e])&&d.length)if(f=d.indexOf(c),0<=f){1<d.length?(d.splice(f,1),b++):delete a[e];break}else b++}else for(let e of a.entries()){const d=e[0],f=ab(e[1],c);f?b+=f:a.delete(d)}return b};function O(a,c){if(!this||this.constructor!==O)return new O(a);if(a){var b=D(a)?a:a.preset;b&&(a=Object.assign({},Xa[b],a))}else a={};b=a.context;const e=!0===b?{depth:1}:b||{},d=D(a.encoder)?Va[a.encoder]:a.encode||a.encoder||Na;this.encoder=d.encode?d:"object"===typeof d?new K(d):{encode:d};this.resolution=a.resolution||9;this.tokenize=b=a.tokenize||"strict";this.depth="strict"===b&&e.depth||0;this.bidirectional=!1!==e.bidirectional;this.fastupdate=!!a.fastupdate;this.score=a.score||null;b=!1;this.map=
+new Map;this.ctx=new Map;this.reg=c||(this.fastupdate?new Map:new Set);this.S=e.resolution||3;this.rtl=d.rtl||a.rtl||!1;this.cache=(b=a.cache||null)&&new Y(b);this.priority=a.priority||4}v=O.prototype;v.clear=function(){this.map.clear();this.ctx.clear();this.reg.clear();this.cache&&this.cache.clear();return this};v.append=function(a,c){return this.add(a,c,!0)};v.contain=function(a){return this.reg.has(a)};
+v.update=function(a,c){const b=this,e=this.remove(a);return e&&e.then?e.then(()=>b.add(a,c)):this.add(a,c)};function bb(a){let c=0;if(a.constructor===Array)for(let b=0,e;b<a.length;b++)(e=a[b])&&(c+=e.length);else for(const b of a){const e=b[0],d=bb(b[1]);d?c+=d:a.delete(e)}return c}v.cleanup=function(){if(!this.fastupdate)return this;bb(this.map);this.depth&&bb(this.ctx);return this};v.searchCache=Ma;
+v.export=function(a,c,b=0,e=0){let d,f;switch(e){case 0:d="reg";f=sa(this.reg);break;case 1:d="cfg";f=null;break;case 2:d="map";f=oa(this.map,this.reg.size);break;case 3:d="ctx";f=qa(this.ctx,this.reg.size);break;default:return}return ua.call(this,a,c,d,f,b,e)};
+v.import=function(a,c){if(c)switch("string"===typeof c&&(c=JSON.parse(c)),a=a.split("."),"json"===a[a.length-1]&&a.pop(),a=1<a.length?a[1]:a[0],a){case "reg":this.fastupdate=!1;this.reg=ta(c,this.reg);break;case "map":this.map=pa(c,this.map);break;case "ctx":this.ctx=ra(c,this.ctx)}};
 v.serialize=function(a=!0){if(!this.reg.size)return"";let c="",b="";for(var e of this.reg.keys())b||(b=typeof e),c+=(c?",":"")+("string"===b?'"'+e+'"':e);c="index.reg=new Set(["+c+"]);";e="";for(var d of this.map.entries()){var f=d[0],g=d[1],h="";for(let m=0,n;m<g.length;m++){n=g[m]||[""];var k="";for(var l=0;l<n.length;l++)k+=(k?",":"")+("string"===b?'"'+n[l]+'"':n[l]);k="["+k+"]";h+=(h?",":"")+k}h='["'+f+'",['+h+"]]";e+=(e?",":"")+h}e="index.map=new Map(["+e+"]);";d="";for(const m of this.ctx.entries()){f=
-m[0];g=m[1];for(const n of g.entries()){g=n[0];h=n[1];k="";for(let t=0,p;t<h.length;t++){p=h[t]||[""];l="";for(let q=0;q<p.length;q++)l+=(l?",":"")+("string"===b?'"'+p[q]+'"':p[q]);l="["+l+"]";k+=(k?",":"")+l}k='new Map([["'+g+'",['+k+"]]])";k='["'+f+'",'+k+"]";d+=(d?",":"")+k}}d="index.ctx=new Map(["+d+"]);";return a?"function inject(index){"+c+e+d+"}":c+e+d};ia(X.prototype);export default {Index:X,Charset:Qa,Encoder:K,Document:R,Worker:null,Resolver:null,IndexedDB:null,Language:{}};
-export const Index=X;export const Charset=Qa;export const Encoder=K;export const Document=R;export const Worker=null;export const Resolver=null;export const IndexedDB=null;export const Language={};
\ No newline at end of file
+m[0];g=m[1];for(const n of g.entries()){g=n[0];h=n[1];k="";for(let t=0,p;t<h.length;t++){p=h[t]||[""];l="";for(let q=0;q<p.length;q++)l+=(l?",":"")+("string"===b?'"'+p[q]+'"':p[q]);l="["+l+"]";k+=(k?",":"")+l}k='new Map([["'+g+'",['+k+"]]])";k='["'+f+'",'+k+"]";d+=(d?",":"")+k}}d="index.ctx=new Map(["+d+"]);";return a?"function inject(index){"+c+e+d+"}":c+e+d};ja(O.prototype);export default {Index:O,Charset:Va,Encoder:K,Document:V,Worker:null,Resolver:null,IndexedDB:null,Language:{}};
+export const Index=O;export const Charset=Va;export const Encoder=K;export const Document=V;export const Worker=null;export const Resolver=null;export const IndexedDB=null;export const Language={};
\ No newline at end of file
diff --git a/dist/flexsearch.es5.debug.js b/dist/flexsearch.es5.debug.js
index f23804c..1ffe88f 100644
--- a/dist/flexsearch.es5.debug.js
+++ b/dist/flexsearch.es5.debug.js
@@ -1,5 +1,5 @@
 /**!
- * FlexSearch.js v0.8.107 (ES5/Debug)
+ * FlexSearch.js v0.8.108 (ES5/Debug)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
@@ -137,12 +137,12 @@ function oa(a, b, c, d) {
     if (!e.done) {
       return a.h.C = !1, e;
     }
-    var f = e.value;
-  } catch (g) {
-    return a.h.A = null, la(a.h, g), pa(a);
+    var g = e.value;
+  } catch (f) {
+    return a.h.A = null, la(a.h, f), pa(a);
   }
   a.h.A = null;
-  d.call(a.h, f);
+  d.call(a.h, g);
   return pa(a);
 }
 function pa(a) {
@@ -198,25 +198,25 @@ function sa(a) {
     return a.throw(d);
   }
   return new Promise(function(d, e) {
-    function f(g) {
-      g.done ? d(g.value) : Promise.resolve(g.value).then(b, c).then(f, e);
+    function g(f) {
+      f.done ? d(f.value) : Promise.resolve(f.value).then(b, c).then(g, e);
     }
-    f(a.next());
+    g(a.next());
   });
 }
 function ta(a) {
   return sa(new qa(new ma(a)));
 }
 C("Symbol", function(a) {
-  function b(f) {
+  function b(g) {
     if (this instanceof b) {
       throw new TypeError("Symbol is not a constructor");
     }
-    return new c(d + (f || "") + "_" + e++, f);
+    return new c(d + (g || "") + "_" + e++, g);
   }
-  function c(f, g) {
-    this.h = f;
-    ba(this, "description", {configurable:!0, writable:!0, value:g});
+  function c(g, f) {
+    this.h = g;
+    ba(this, "description", {configurable:!0, writable:!0, value:f});
   }
   if (a) {
     return a;
@@ -248,14 +248,14 @@ function ua(a) {
   return a;
 }
 C("Promise", function(a) {
-  function b(g) {
+  function b(f) {
     this.A = 0;
     this.B = void 0;
     this.h = [];
     this.H = !1;
     var h = this.C();
     try {
-      g(h.resolve, h.reject);
+      f(h.resolve, h.reject);
     } catch (k) {
       h.reject(k);
     }
@@ -263,15 +263,15 @@ C("Promise", function(a) {
   function c() {
     this.h = null;
   }
-  function d(g) {
-    return g instanceof b ? g : new b(function(h) {
-      h(g);
+  function d(f) {
+    return f instanceof b ? f : new b(function(h) {
+      h(f);
     });
   }
   if (a) {
     return a;
   }
-  c.prototype.A = function(g) {
+  c.prototype.A = function(f) {
     if (null == this.h) {
       this.h = [];
       var h = this;
@@ -279,19 +279,19 @@ C("Promise", function(a) {
         h.D();
       });
     }
-    this.h.push(g);
+    this.h.push(f);
   };
   var e = B.setTimeout;
-  c.prototype.B = function(g) {
-    e(g, 0);
+  c.prototype.B = function(f) {
+    e(f, 0);
   };
   c.prototype.D = function() {
     for (; this.h && this.h.length;) {
-      var g = this.h;
+      var f = this.h;
       this.h = [];
-      for (var h = 0; h < g.length; ++h) {
-        var k = g[h];
-        g[h] = null;
+      for (var h = 0; h < f.length; ++h) {
+        var k = f[h];
+        f[h] = null;
         try {
           k();
         } catch (l) {
@@ -301,31 +301,31 @@ C("Promise", function(a) {
     }
     this.h = null;
   };
-  c.prototype.C = function(g) {
+  c.prototype.C = function(f) {
     this.B(function() {
-      throw g;
+      throw f;
     });
   };
   b.prototype.C = function() {
-    function g(l) {
+    function f(l) {
       return function(m) {
         k || (k = !0, l.call(h, m));
       };
     }
     var h = this, k = !1;
-    return {resolve:g(this.fa), reject:g(this.D)};
+    return {resolve:f(this.fa), reject:f(this.D)};
   };
-  b.prototype.fa = function(g) {
-    if (g === this) {
+  b.prototype.fa = function(f) {
+    if (f === this) {
       this.D(new TypeError("A Promise cannot resolve to itself"));
     } else {
-      if (g instanceof b) {
-        this.ha(g);
+      if (f instanceof b) {
+        this.ha(f);
       } else {
         a: {
-          switch(typeof g) {
+          switch(typeof f) {
             case "object":
-              var h = null != g;
+              var h = null != f;
               break a;
             case "function":
               h = !0;
@@ -334,41 +334,41 @@ C("Promise", function(a) {
               h = !1;
           }
         }
-        h ? this.ea(g) : this.G(g);
+        h ? this.ea(f) : this.G(f);
       }
     }
   };
-  b.prototype.ea = function(g) {
+  b.prototype.ea = function(f) {
     var h = void 0;
     try {
-      h = g.then;
+      h = f.then;
     } catch (k) {
       this.D(k);
       return;
     }
-    "function" == typeof h ? this.ia(h, g) : this.G(g);
+    "function" == typeof h ? this.ia(h, f) : this.G(f);
   };
-  b.prototype.D = function(g) {
-    this.M(2, g);
+  b.prototype.D = function(f) {
+    this.M(2, f);
   };
-  b.prototype.G = function(g) {
-    this.M(1, g);
+  b.prototype.G = function(f) {
+    this.M(1, f);
   };
-  b.prototype.M = function(g, h) {
+  b.prototype.M = function(f, h) {
     if (0 != this.A) {
-      throw Error("Cannot settle(" + g + ", " + h + "): Promise already settled in state" + this.A);
+      throw Error("Cannot settle(" + f + ", " + h + "): Promise already settled in state" + this.A);
     }
-    this.A = g;
+    this.A = f;
     this.B = h;
     2 === this.A && this.ga();
     this.N();
   };
   b.prototype.ga = function() {
-    var g = this;
+    var f = this;
     e(function() {
-      if (g.T()) {
+      if (f.T()) {
         var h = B.console;
-        "undefined" !== typeof h && h.error(g.B);
+        "undefined" !== typeof h && h.error(f.B);
       }
     }, 1);
   };
@@ -376,37 +376,37 @@ C("Promise", function(a) {
     if (this.H) {
       return !1;
     }
-    var g = B.CustomEvent, h = B.Event, k = B.dispatchEvent;
+    var f = B.CustomEvent, h = B.Event, k = B.dispatchEvent;
     if ("undefined" === typeof k) {
       return !0;
     }
-    "function" === typeof g ? g = new g("unhandledrejection", {cancelable:!0}) : "function" === typeof h ? g = new h("unhandledrejection", {cancelable:!0}) : (g = B.document.createEvent("CustomEvent"), g.initCustomEvent("unhandledrejection", !1, !0, g));
-    g.promise = this;
-    g.reason = this.B;
-    return k(g);
+    "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 g = 0; g < this.h.length; ++g) {
-        f.A(this.h[g]);
+      for (var f = 0; f < this.h.length; ++f) {
+        g.A(this.h[f]);
       }
       this.h = null;
     }
   };
-  var f = new c();
-  b.prototype.ha = function(g) {
+  var g = new c();
+  b.prototype.ha = function(f) {
     var h = this.C();
-    g.U(h.resolve, h.reject);
+    f.U(h.resolve, h.reject);
   };
-  b.prototype.ia = function(g, h) {
+  b.prototype.ia = function(f, h) {
     var k = this.C();
     try {
-      g.call(h, k.resolve, k.reject);
+      f.call(h, k.resolve, k.reject);
     } catch (l) {
       k.reject(l);
     }
   };
-  b.prototype.then = function(g, h) {
+  b.prototype.then = function(f, h) {
     function k(p, q) {
       return "function" == typeof p ? function(t) {
         try {
@@ -420,17 +420,17 @@ C("Promise", function(a) {
       l = p;
       m = q;
     });
-    this.U(k(g, l), k(h, m));
+    this.U(k(f, l), k(h, m));
     return n;
   };
-  b.prototype.catch = function(g) {
-    return this.then(void 0, g);
+  b.prototype.catch = function(f) {
+    return this.then(void 0, f);
   };
-  b.prototype.U = function(g, h) {
+  b.prototype.U = function(f, h) {
     function k() {
       switch(l.A) {
         case 1:
-          g(l.B);
+          f(l.B);
           break;
         case 2:
           h(l.B);
@@ -440,24 +440,24 @@ C("Promise", function(a) {
       }
     }
     var l = this;
-    null == this.h ? f.A(k) : this.h.push(k);
+    null == this.h ? g.A(k) : this.h.push(k);
     this.H = !0;
   };
   b.resolve = d;
-  b.reject = function(g) {
+  b.reject = function(f) {
     return new b(function(h, k) {
-      k(g);
+      k(f);
     });
   };
-  b.race = function(g) {
+  b.race = function(f) {
     return new b(function(h, k) {
-      for (var l = w(g), m = l.next(); !m.done; m = l.next()) {
+      for (var l = w(f), m = l.next(); !m.done; m = l.next()) {
         d(m.value).U(h, k);
       }
     });
   };
-  b.all = function(g) {
-    var h = w(g), k = h.next();
+  b.all = function(f) {
+    var h = w(f), k = h.next();
     return k.done ? d([]) : new b(function(l, m) {
       function n(t) {
         return function(x) {
@@ -478,8 +478,8 @@ function va(a, b) {
   a instanceof String && (a += "");
   var c = 0, d = !1, e = {next:function() {
     if (!d && c < a.length) {
-      var f = c++;
-      return {value:b(f, a[f]), done:!1};
+      var g = c++;
+      return {value:b(g, a[g]), done:!1};
     }
     d = !0;
     return {done:!0, value:void 0};
@@ -516,12 +516,12 @@ C("WeakMap", function(a) {
     return "object" === l && null !== k || "function" === l;
   }
   function e(k) {
-    if (!H(k, g)) {
+    if (!H(k, f)) {
       var l = new c();
-      ba(k, g, {value:l});
+      ba(k, f, {value:l});
     }
   }
-  function f(k) {
+  function g(k) {
     var l = Object[k];
     l && (Object[k] = function(m) {
       if (m instanceof c) {
@@ -549,30 +549,30 @@ C("WeakMap", function(a) {
   }()) {
     return a;
   }
-  var g = "$jscomp_hidden_" + Math.random();
-  f("freeze");
-  f("preventExtensions");
-  f("seal");
+  var f = "$jscomp_hidden_" + Math.random();
+  g("freeze");
+  g("preventExtensions");
+  g("seal");
   var h = 0;
   b.prototype.set = function(k, l) {
     if (!d(k)) {
       throw Error("Invalid WeakMap key");
     }
     e(k);
-    if (!H(k, g)) {
+    if (!H(k, f)) {
       throw Error("WeakMap key fail: " + k);
     }
-    k[g][this.h] = l;
+    k[f][this.h] = l;
     return this;
   };
   b.prototype.get = function(k) {
-    return d(k) && H(k, g) ? k[g][this.h] : void 0;
+    return d(k) && H(k, f) ? k[f][this.h] : void 0;
   };
   b.prototype.has = function(k) {
-    return d(k) && H(k, g) && H(k[g], this.h);
+    return d(k) && H(k, f) && H(k[f], this.h);
   };
   b.prototype.delete = function(k) {
-    return d(k) && H(k, g) && H(k[g], this.h) ? delete k[g][this.h] : !1;
+    return d(k) && H(k, f) && H(k[f], this.h) ? delete k[f][this.h] : !1;
   };
   return b;
 });
@@ -598,7 +598,7 @@ C("Map", function(a) {
   }
   function d(h, k) {
     var l = k && typeof k;
-    "object" == l || "function" == l ? f.has(k) ? l = f.get(k) : (l = "" + ++g, f.set(k, l)) : l = "p_" + k;
+    "object" == l || "function" == l ? g.has(k) ? l = g.get(k) : (l = "" + ++f, g.set(k, l)) : l = "p_" + k;
     var m = h[0][l];
     if (m && H(h[0], l)) {
       for (h = 0; h < m.length; h++) {
@@ -642,7 +642,7 @@ C("Map", function(a) {
   }()) {
     return a;
   }
-  var f = new WeakMap();
+  var g = new WeakMap();
   e.prototype.set = function(h, k) {
     h = 0 === h ? 0 : h;
     var l = d(this, h);
@@ -686,7 +686,7 @@ C("Map", function(a) {
     }
   };
   e.prototype[Symbol.iterator] = e.prototype.entries;
-  var g = 0;
+  var f = 0;
   return e;
 });
 C("Array.prototype.keys", function(a) {
@@ -716,13 +716,13 @@ C("Set", function(a) {
       if (!d.has(c) || 1 != d.size || d.add(c) != d || 1 != d.size || d.add({x:4}) != d || 2 != d.size) {
         return !1;
       }
-      var e = d.entries(), f = e.next();
-      if (f.done || f.value[0] != c || f.value[1] != c) {
+      var e = d.entries(), g = e.next();
+      if (g.done || g.value[0] != c || g.value[1] != c) {
         return !1;
       }
-      f = e.next();
-      return f.done || f.value[0] == c || 4 != f.value[0].x || f.value[1] != f.value[0] ? !1 : e.next().done;
-    } catch (g) {
+      g = e.next();
+      return g.done || g.value[0] == c || 4 != g.value[0].x || g.value[1] != g.value[0] ? !1 : e.next().done;
+    } catch (f) {
       return !1;
     }
   }()) {
@@ -756,8 +756,8 @@ C("Set", function(a) {
   b.prototype[Symbol.iterator] = b.prototype.values;
   b.prototype.forEach = function(c, d) {
     var e = this;
-    this.h.forEach(function(f) {
-      return c.call(d, f, f, e);
+    this.h.forEach(function(g) {
+      return c.call(d, g, g, e);
     });
   };
   return b;
@@ -781,8 +781,8 @@ C("Array.prototype.includes", function(a) {
     var e = d.length;
     c = c || 0;
     for (0 > c && (c = Math.max(c + e, 0)); c < e; c++) {
-      var f = d[c];
-      if (f === b || Object.is(f, b)) {
+      var g = d[c];
+      if (g === b || Object.is(g, b)) {
         return !0;
       }
     }
@@ -830,8 +830,8 @@ function I(a, b, c) {
     if ("undefined" !== e) {
       if (c) {
         if ("function" === e && d === e) {
-          return function(f) {
-            return a(c(f));
+          return function(g) {
+            return a(c(g));
           };
         }
         b = a.constructor;
@@ -909,15 +909,15 @@ function Ga(a) {
   if (!this || this.constructor !== Ga) {
     var b = Function.prototype.bind, c = b.apply, d = [null], e = d.concat;
     if (arguments instanceof Array) {
-      var f = arguments;
+      var g = arguments;
     } else {
-      f = w(arguments);
-      for (var g, h = []; !(g = f.next()).done;) {
-        h.push(g.value);
+      g = w(arguments);
+      for (var f, h = []; !(f = g.next()).done;) {
+        h.push(f.value);
       }
-      f = h;
+      g = h;
     }
-    return new (c.call(b, Ga, e.call(d, f)))();
+    return new (c.call(b, Ga, e.call(d, g)))();
   }
   for (b = 0; b < arguments.length; b++) {
     this.assign(arguments[b]);
@@ -942,7 +942,7 @@ u.assign = function(a) {
       }
       try {
         this.split = new RegExp("[" + (b ? "^" : "") + d + "]+", "u");
-      } catch (f) {
+      } catch (g) {
         console.error("Your split configuration:", c, "is not supported on this platform. It falls back to using simple whitespace splitter instead: /s+/."), this.split = /\s+/;
       }
     } else {
@@ -952,7 +952,7 @@ u.assign = function(a) {
   } else {
     try {
       this.split = I(this.split, Ba);
-    } catch (f) {
+    } catch (g) {
       console.warn("This platform does not support unicode regex. It falls back to using simple whitespace splitter instead: /s+/."), this.split = /\s+/;
     }
     this.numeric = I(a.numeric, I(this.numeric, !0));
@@ -1051,15 +1051,15 @@ u.encode = function(a) {
   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, "$1 "));
-  for (var c = !(this.dedupe || this.mapper || this.filter || this.matcher || this.stemmer || this.replacer), d = [], e = this.split || "" === this.split ? a.split(this.split) : a, f = 0, g = void 0, h = void 0; f < e.length; f++) {
-    if ((g = h = e[f]) && !(g.length < this.minlength)) {
+  for (var c = !(this.dedupe || this.mapper || this.filter || this.matcher || this.stemmer || this.replacer), d = [], e = this.split || "" === this.split ? a.split(this.split) : a, g = 0, f = void 0, h = void 0; g < e.length; g++) {
+    if ((f = h = e[g]) && !(f.length < this.minlength)) {
       if (c) {
-        d.push(g);
+        d.push(f);
       } else {
-        if (!this.filter || !this.filter.has(g)) {
-          if (this.cache && g.length <= this.H) {
+        if (!this.filter || !this.filter.has(f)) {
+          if (this.cache && f.length <= this.H) {
             if (this.D) {
-              var k = this.C.get(g);
+              var k = this.C.get(f);
               if (k || "" === k) {
                 k && d.push(k);
                 continue;
@@ -1068,26 +1068,26 @@ u.encode = function(a) {
               this.D = setTimeout(N, 50, this);
             }
           }
-          this.stemmer && 2 < g.length && (this.N || (this.N = new RegExp("(?!^)(" + this.A + ")$")), g = g.replace(this.N, function(q) {
+          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);
-          }), g.length < this.minlength || this.filter && this.filter.has(g)) && (g = "");
-          if (g && (this.mapper || this.dedupe && 1 < g.length)) {
+          }), f.length < this.minlength || this.filter && this.filter.has(f)) && (f = "");
+          if (f && (this.mapper || this.dedupe && 1 < f.length)) {
             k = "";
-            for (var l = 0, m = "", n = void 0, p = void 0; l < g.length; l++) {
-              n = g.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);
+            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);
             }
-            g = k;
+            f = k;
           }
-          this.matcher && 1 < g.length && (this.M || (this.M = new RegExp("(" + this.h + ")", "g")), g = g.replace(this.M, function(q) {
+          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 (g && this.replacer) {
-            for (k = 0; g && k < this.replacer.length; k += 2) {
-              g = g.replace(this.replacer[k], this.replacer[k + 1]);
+          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, g), this.C.size > this.T && (this.C.clear(), this.H = this.H / 1.1 | 0));
-          g && d.push(g);
+          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);
         }
       }
     }
@@ -1101,43 +1101,93 @@ function N(a) {
   a.B.clear();
   a.C.clear();
 }
-;function Ja(a) {
-  var b, c, d, e, f, g, h;
-  return ta(function(k) {
-    a = a.data;
-    b = self._index;
-    c = a.args;
-    d = a.task;
-    switch(d) {
-      case "init":
-        e = a.options || {};
-        (f = a.factory) ? (Function("return " + f)()(self), self._index = new self.FlexSearch.Index(e), delete self.FlexSearch) : self._index = new O(e);
-        postMessage({id:a.id});
-        break;
-      default:
-        g = a.id, h = b[d].apply(b, c), postMessage("search" === d ? {id:g, msg:h} : {id:g});
+;var O, Ha;
+function Ia(a) {
+  var b, c, d, e, g;
+  return ta(function(f) {
+    if (1 == f.h) {
+      switch(a = a.data, b = a.task, c = a.id, d = a.args, b) {
+        case "init":
+          Ha = a.options || {};
+          (e = a.factory) ? (Function("return " + e)()(self), O = new self.FlexSearch.Index(Ha), delete self.FlexSearch) : O = new R(Ha);
+          postMessage({id:c});
+          break;
+        default:
+          f.h = 2;
+          return;
+      }
+    } else {
+      if (4 != f.h) {
+        "export" === b && (d = [Ha.export]);
+        if ("import" !== b) {
+          g = O[b].apply(O, d);
+          f.h = 4;
+          return;
+        }
+        return E(f, Ha.import.call(O, O), 4);
+      }
+      postMessage("search" === b ? {id:c, msg:g} : {id:c});
     }
-    k.h = 0;
+    f.h = 0;
   });
 }
-;var Ka = 0;
-function R(a) {
-  function b(g) {
+;function Ja(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 = {}, Qa = {};
+function Ra(a) {
+  Na = 0;
+  Pa[a] = Qa[a];
+}
+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 || (Na = setTimeout(Ra, 0, a), Oa = Date.now());
+    Qa[a] || (Qa[a] = Pa[a] = 1000);
+    if (!--Pa[a]) {
+      Pa[a] = Qa[a] = Qa[a] * this.priority * this.priority * 3 / (Date.now() - Oa) | 0 || 1;
+      Na = clearTimeout(Na);
+      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 Sa = 0;
+function S(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 = g;
+    this.worker = f;
     this.h = J();
     if (this.worker) {
       d ? this.worker.on("message", h) : this.worker.onmessage = h;
       if (a.config) {
         return new Promise(function(k) {
-          e.h[++Ka] = function() {
+          e.h[++Sa] = function() {
             k(e);
           };
-          e.worker.postMessage({id:Ka, task:"init", factory:c, options:a});
+          e.worker.postMessage({id:Sa, task:"init", factory:c, options:a});
         });
       }
       this.worker.postMessage({task:"init", factory:c, options:a});
@@ -1145,80 +1195,45 @@ function R(a) {
     }
   }
   a = void 0 === a ? {} : a;
-  if (!this || this.constructor !== R) {
-    return new R(a);
+  if (!this || this.constructor !== S) {
+    return new S(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, f = La(c, d, a.worker);
-  return f.then ? f.then(function(g) {
-    return b.call(e, g);
-  }) : b.call(this, f);
+  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);
 }
-Ma("add");
-Ma("append");
-Ma("search");
-Ma("update");
-Ma("remove");
-function Ma(a) {
-  R.prototype[a] = R.prototype[a + "Async"] = function() {
-    var b = this, c = arguments, d, e, f, g, h;
+T("add");
+T("append");
+T("search");
+T("update");
+T("remove");
+T("clear");
+T("export");
+T("import");
+Ja(S.prototype);
+function T(a) {
+  S.prototype[a] = function() {
+    var b = this, c = arguments, d, e, g, f, h;
     return ta(function(k) {
       d = b;
       e = [].slice.call(c);
-      f = e[e.length - 1];
-      "function" === typeof f && (g = f, e.splice(e.length - 1, 1));
+      g = e[e.length - 1];
+      "function" === typeof g && (f = g, e.splice(e.length - 1, 1));
       h = new Promise(function(l) {
-        d.h[++Ka] = l;
-        d.worker.postMessage({task:a, id:Ka, args:e});
+        d.h[++Sa] = l;
+        d.worker.postMessage({task:a, id:Sa, args:e});
       });
-      return g ? (h.then(g), k.return(b)) : k.return(h);
+      return f ? (h.then(f), k.return(b)) : k.return(h);
     });
   };
 }
-function La(a, b, c) {
-  return b ? "undefined" !== typeof module ? new (require("worker_threads")["Worker"])(__dirname + "/node/node.js") : import("worker_threads").then(function(worker){ return new worker["Worker"]((1,eval)("import.meta.dirname") + "/node/node.mjs"); }) : a ? new window.Worker(URL.createObjectURL(new Blob(["onmessage=" + Ja.toString()], {type:"text/javascript"}))) : new window.Worker(K(c) ? c : (0,eval)("import.meta.url").replace("/worker.js", "/worker/worker.js").replace("flexsearch.bundle.module.min.js", 
+function Ta(a, b, c) {
+  return b ? "undefined" !== typeof module ? new (require("worker_threads")["Worker"])(__dirname + "/node/node.js") : import("worker_threads").then(function(worker){ return new worker["Worker"]((1,eval)("import.meta.dirname") + "/node/node.mjs"); }) : a ? new window.Worker(URL.createObjectURL(new Blob(["onmessage=" + Ia.toString()], {type:"text/javascript"}))) : new window.Worker(K(c) ? c : (0,eval)("import.meta.url").replace("/worker.js", "/worker/worker.js").replace("flexsearch.bundle.module.min.js", 
   "module/worker/worker.js"), {type:"module"});
 }
-;function Na(a) {
-  Oa.call(a, "add");
-  Oa.call(a, "append");
-  Oa.call(a, "search");
-  Oa.call(a, "update");
-  Oa.call(a, "remove");
-}
-var Pa, Qa, Ra = {}, Sa = {};
-function Ta(a) {
-  Pa = 0;
-  Ra[a] = Sa[a];
-}
-function Oa(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];
-    }
-    Pa || (Pa = setTimeout(Ta, 0, a), Qa = Date.now());
-    Sa[a] || (Sa[a] = Ra[a] = 1000);
-    if (!--Ra[a]) {
-      Ra[a] = Sa[a] = Sa[a] * this.priority * this.priority * 3 / (Date.now() - Qa) | 0 || 1;
-      Pa = clearTimeout(Pa);
-      var e = this;
-      return new Promise(function(g) {
-        setTimeout(function() {
-          g(e[a + "Async"].apply(e, b));
-        }, 0);
-      });
-    }
-    var f = this[a].apply(this, b);
-    c = f.then ? f : new Promise(function(g) {
-      return g(f);
-    });
-    d && c.then(d);
-    return c;
-  };
-}
 ;function Ua(a, b) {
   b = void 0 === b ? 0 : b;
   var c = [], d = [];
@@ -1271,28 +1286,28 @@ function Za(a, b) {
   }
   return b;
 }
-function $a(a, b, c, d, e, f, g) {
-  g = void 0 === g ? 0 : g;
+function $a(a, b, c, d, e, g, f) {
+  f = void 0 === f ? 0 : f;
   var h = d && d.constructor === Array, k = h ? d.shift() : d;
   if (!k) {
-    return this.export(a, b, e, f + 1);
+    return this.export(a, b, e, g + 1);
   }
-  if ((k = a((b ? b + "." : "") + (g + 1) + "." + c, JSON.stringify(k))) && k.then) {
+  if ((k = a((b ? b + "." : "") + (f + 1) + "." + c, JSON.stringify(k))) && k.then) {
     var l = this;
     return k.then(function() {
-      return $a.call(l, a, b, c, h ? d : null, e, f, g + 1);
+      return $a.call(l, a, b, c, h ? d : null, e, g, f + 1);
     });
   }
-  return $a.call(this, a, b, c, h ? d : null, e, f, g + 1);
+  return $a.call(this, a, b, c, h ? d : null, e, g, f + 1);
 }
 ;function ab(a, b, c, d) {
-  for (var e = [], f = 0, g; f < a.index.length; f++) {
-    if (g = a.index[f], b >= g.length) {
-      b -= g.length;
+  for (var e = [], g = 0, f; g < a.index.length; g++) {
+    if (f = a.index[g], b >= f.length) {
+      b -= f.length;
     } else {
-      b = g[d ? "splice" : "slice"](b, c);
-      if (g = b.length) {
-        if (e = e.length ? e.concat(b) : b, c -= g, d && (a.length -= g), !c) {
+      b = f[d ? "splice" : "slice"](b, c);
+      if (f = b.length) {
+        if (e = e.length ? e.concat(b) : b, c -= f, d && (a.length -= f), !c) {
           break;
         }
       }
@@ -1301,9 +1316,9 @@ function $a(a, b, c, d, e, f, g) {
   }
   return e;
 }
-function S(a) {
+function bb(a) {
   if (!this) {
-    return new S(a);
+    return new bb(a);
   }
   this.index = a ? [a] : [];
   this.length = a ? a.length : 0;
@@ -1327,21 +1342,21 @@ function S(a) {
     }
     if ("indexOf" === d) {
       return function(e) {
-        for (var f = 0, g = 0, h, k; g < b.index.length; g++) {
-          h = b.index[g];
+        for (var g = 0, f = 0, h, k; f < b.index.length; f++) {
+          h = b.index[f];
           k = h.indexOf(e);
           if (0 <= k) {
-            return f + k;
+            return g + k;
           }
-          f += h.length;
+          g += h.length;
         }
         return -1;
       };
     }
     if ("includes" === d) {
       return function(e) {
-        for (var f = 0; f < b.index.length; f++) {
-          if (b.index[f].includes(e)) {
+        for (var g = 0; g < b.index.length; g++) {
+          if (b.index[g].includes(e)) {
             return !0;
           }
         }
@@ -1349,13 +1364,13 @@ function S(a) {
       };
     }
     if ("slice" === d) {
-      return function(e, f) {
-        return ab(b, e || 0, f || b.length, !1);
+      return function(e, g) {
+        return ab(b, e || 0, g || b.length, !1);
       };
     }
     if ("splice" === d) {
-      return function(e, f) {
-        return ab(b, e || 0, f || b.length, !0);
+      return function(e, g) {
+        return ab(b, e || 0, g || b.length, !0);
       };
     }
     if ("constructor" === d) {
@@ -1371,31 +1386,13 @@ function S(a) {
     return !0;
   }});
 }
-S.prototype.clear = function() {
+bb.prototype.clear = function() {
   this.index.length = 0;
 };
-S.prototype.destroy = function() {
+bb.prototype.destroy = function() {
   this.proxy = this.index = null;
 };
-S.prototype.push = function() {
-};
-function T(a) {
-  a = void 0 === a ? 8 : a;
-  if (!this) {
-    return new T(a);
-  }
-  this.index = J();
-  this.B = [];
-  this.size = 0;
-  32 < a ? (this.h = bb, this.A = BigInt(a)) : (this.h = cb, this.A = a);
-}
-T.prototype.get = function(a) {
-  var b = this.h(a);
-  return (b = this.index[b]) && b.get(a);
-};
-T.prototype.set = function(a, b) {
-  var c = this.h(a), d = this.index[c];
-  d ? (c = d.size, d.set(a, b), (c -= d.size) && this.size++) : (this.index[c] = d = new Map([[a, b]]), this.B.push(d));
+bb.prototype.push = function() {
 };
 function U(a) {
   a = void 0 === a ? 8 : a;
@@ -1403,36 +1400,54 @@ function U(a) {
     return new U(a);
   }
   this.index = J();
-  this.h = [];
-  32 < a ? (this.B = bb, this.A = BigInt(a)) : (this.B = cb, this.A = a);
+  this.B = [];
+  this.size = 0;
+  32 < a ? (this.h = cb, this.A = BigInt(a)) : (this.h = db, this.A = a);
 }
-U.prototype.add = function(a) {
+U.prototype.get = function(a) {
+  var b = this.h(a);
+  return (b = this.index[b]) && b.get(a);
+};
+U.prototype.set = function(a, b) {
+  var c = this.h(a), d = this.index[c];
+  d ? (c = d.size, d.set(a, b), (c -= d.size) && this.size++) : (this.index[c] = d = new Map([[a, b]]), this.B.push(d));
+};
+function V(a) {
+  a = void 0 === a ? 8 : a;
+  if (!this) {
+    return new V(a);
+  }
+  this.index = J();
+  this.h = [];
+  32 < a ? (this.B = cb, this.A = BigInt(a)) : (this.B = db, this.A = a);
+}
+V.prototype.add = function(a) {
   var b = this.B(a), c = this.index[b];
   c ? (b = c.size, c.add(a), (b -= c.size) && this.size++) : (this.index[b] = c = new Set([a]), this.h.push(c));
 };
-u = T.prototype;
-u.has = U.prototype.has = function(a) {
+u = U.prototype;
+u.has = V.prototype.has = function(a) {
   var b = this.B(a);
   return (b = this.index[b]) && b.has(a);
 };
-u.delete = U.prototype.delete = function(a) {
+u.delete = V.prototype.delete = function(a) {
   var b = this.B(a);
   (b = this.index[b]) && b.delete(a) && this.size--;
 };
-u.clear = U.prototype.clear = function() {
+u.clear = V.prototype.clear = function() {
   this.index = J();
   this.h = [];
   this.size = 0;
 };
-u.values = U.prototype.values = function db() {
-  var b, c = this, d, e, f;
-  return ra(db, function(g) {
-    switch(g.h) {
+u.values = V.prototype.values = function eb() {
+  var b, c = this, d, e, g;
+  return ra(eb, function(f) {
+    switch(f.h) {
       case 1:
         b = 0;
       case 2:
         if (!(b < c.h.length)) {
-          g.h = 0;
+          f.h = 0;
           break;
         }
         d = w(c.h[b].values());
@@ -1440,25 +1455,25 @@ u.values = U.prototype.values = function db() {
       case 5:
         if (e.done) {
           b++;
-          g.h = 2;
+          f.h = 2;
           break;
         }
-        f = e.value;
-        return E(g, f, 6);
+        g = e.value;
+        return E(f, g, 6);
       case 6:
-        e = d.next(), g.h = 5;
+        e = d.next(), f.h = 5;
     }
   });
 };
-u.keys = U.prototype.keys = function eb() {
-  var b, c = this, d, e, f;
-  return ra(eb, function(g) {
-    switch(g.h) {
+u.keys = V.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)) {
-          g.h = 0;
+          f.h = 0;
           break;
         }
         d = w(c.h[b].keys());
@@ -1466,25 +1481,25 @@ u.keys = U.prototype.keys = function eb() {
       case 5:
         if (e.done) {
           b++;
-          g.h = 2;
+          f.h = 2;
           break;
         }
-        f = e.value;
-        return E(g, f, 6);
+        g = e.value;
+        return E(f, g, 6);
       case 6:
-        e = d.next(), g.h = 5;
+        e = d.next(), f.h = 5;
     }
   });
 };
-u.entries = U.prototype.entries = function fb() {
-  var b, c = this, d, e, f;
-  return ra(fb, function(g) {
-    switch(g.h) {
+u.entries = V.prototype.entries = function gb() {
+  var b, c = this, d, e, g;
+  return ra(gb, function(f) {
+    switch(f.h) {
       case 1:
         b = 0;
       case 2:
         if (!(b < c.h.length)) {
-          g.h = 0;
+          f.h = 0;
           break;
         }
         d = w(c.h[b].entries());
@@ -1492,17 +1507,17 @@ u.entries = U.prototype.entries = function fb() {
       case 5:
         if (e.done) {
           b++;
-          g.h = 2;
+          f.h = 2;
           break;
         }
-        f = e.value;
-        return E(g, f, 6);
+        g = e.value;
+        return E(f, g, 6);
       case 6:
-        e = d.next(), g.h = 5;
+        e = d.next(), f.h = 5;
     }
   });
 };
-function cb(a) {
+function db(a) {
   var b = Math.pow(2, this.A) - 1;
   if ("number" == typeof a) {
     return a & b;
@@ -1512,10 +1527,10 @@ function cb(a) {
   }
   return 32 === this.A ? c + Math.pow(2, 31) : c;
 }
-function bb() {
+function cb() {
   throw Error("The keystore is limited to 32 for EcmaScript5");
 }
-;V.prototype.add = function(a, b, c) {
+;W.prototype.add = function(a, b, c) {
   M(a) && (b = a, a = ya(b, this.key));
   if (b && (a || 0 === a)) {
     if (!c && this.reg.has(a)) {
@@ -1523,50 +1538,50 @@ function bb() {
     }
     for (var d = 0, e; d < this.field.length; d++) {
       e = this.J[d];
-      var f = this.index.get(this.field[d]);
+      var g = this.index.get(this.field[d]);
       if ("function" === typeof e) {
-        (e = e(b)) && f.add(a, e, !1, !0);
+        (e = e(b)) && g.add(a, e, !1, !0);
       } else {
-        var g = e.R;
-        if (!g || g(b)) {
-          e.constructor === String ? e = ["" + e] : K(e) && (e = [e]), gb(b, e, this.S, 0, f, a, e[0], c);
+        var f = e.R;
+        if (!f || f(b)) {
+          e.constructor === String ? e = ["" + e] : K(e) && (e = [e]), hb(b, e, this.S, 0, g, a, e[0], c);
         }
       }
     }
     if (this.tag) {
       for (d = 0; d < this.L.length; d++) {
-        g = this.L[d];
+        f = this.L[d];
         var h = this.aa[d];
-        f = this.tag.get(h);
+        g = this.tag.get(h);
         e = J();
-        if ("function" === typeof g) {
-          if (g = g(b), !g) {
+        if ("function" === typeof f) {
+          if (f = f(b), !f) {
             continue;
           }
         } else {
-          var k = g.R;
+          var k = f.R;
           if (k && !k(b)) {
             continue;
           }
-          g.constructor === String && (g = "" + g);
-          g = ya(b, g);
+          f.constructor === String && (f = "" + f);
+          f = ya(b, f);
         }
-        if (f && g) {
-          for (K(g) && (g = [g]), h = 0, k = void 0; h < g.length; h++) {
-            var l = g[h];
+        if (g && f) {
+          for (K(f) && (f = [f]), h = 0, k = void 0; h < f.length; h++) {
+            var l = f[h];
             if (!e[l]) {
               e[l] = 1;
               var m;
-              (m = f.get(l)) ? k = m : f.set(l, k = []);
+              (m = g.get(l)) ? k = m : g.set(l, k = []);
               if (!c || !k.includes(a)) {
                 if (k.length === Math.pow(2, 31) - 1) {
-                  m = new S(k);
+                  m = new bb(k);
                   if (this.fastupdate) {
                     for (var n = w(this.reg.values()), p = n.next(); !p.done; p = n.next()) {
                       p = p.value, p.includes(k) && (p[p.indexOf(k)] = m);
                     }
                   }
-                  f.set(l, k = m);
+                  g.set(l, k = m);
                 }
                 k.push(a);
                 this.fastupdate && ((l = this.reg.get(a)) ? l.push(k) : this.reg.set(a, [k]));
@@ -1574,7 +1589,7 @@ function bb() {
             }
           }
         } else {
-          f || console.warn("Tag '" + h + "' was not found");
+          g || console.warn("Tag '" + h + "' was not found");
         }
       }
     }
@@ -1582,11 +1597,11 @@ function bb() {
       if (this.I) {
         var q = J();
         for (c = 0; c < this.I.length; c++) {
-          if (d = this.I[c], f = d.R, !f || f(b)) {
-            f = void 0;
+          if (d = this.I[c], g = d.R, !g || g(b)) {
+            g = void 0;
             if ("function" === typeof d) {
-              f = d(b);
-              if (!f) {
+              g = d(b);
+              if (!g) {
                 continue;
               }
               d = [d.ja];
@@ -1594,7 +1609,7 @@ function bb() {
               q[d] = b[d];
               continue;
             }
-            hb(b, q, d, 0, d[0], f);
+            ib(b, q, d, 0, d[0], g);
           }
         }
       }
@@ -1603,47 +1618,47 @@ function bb() {
   }
   return this;
 };
-function hb(a, b, c, d, e, f) {
+function ib(a, b, c, d, e, g) {
   a = a[e];
   if (d === c.length - 1) {
-    b[e] = f || a;
+    b[e] = g || a;
   } else if (a) {
     if (a.constructor === Array) {
       for (b = b[e] = Array(a.length), e = 0; e < a.length; e++) {
-        hb(a, b, c, d, e);
+        ib(a, b, c, d, e);
       }
     } else {
-      b = b[e] || (b[e] = J()), e = c[++d], hb(a, b, c, d, e);
+      b = b[e] || (b[e] = J()), e = c[++d], ib(a, b, c, d, e);
     }
   }
 }
-function gb(a, b, c, d, e, f, g, h) {
-  if (a = a[g]) {
+function hb(a, b, c, d, e, g, f, h) {
+  if (a = a[f]) {
     if (d === b.length - 1) {
       if (a.constructor === Array) {
         if (c[d]) {
           for (b = 0; b < a.length; b++) {
-            e.add(f, a[b], !0, !0);
+            e.add(g, a[b], !0, !0);
           }
           return;
         }
         a = a.join(" ");
       }
-      e.add(f, a, h, !0);
+      e.add(g, a, h, !0);
     } else {
       if (a.constructor === Array) {
-        for (g = 0; g < a.length; g++) {
-          gb(a, b, c, d, e, f, g, h);
+        for (f = 0; f < a.length; f++) {
+          hb(a, b, c, d, e, g, f, h);
         }
       } else {
-        g = b[++d], gb(a, b, c, d, e, f, g, h);
+        f = b[++d], hb(a, b, c, d, e, g, f, h);
       }
     }
   } else {
-    e.db && e.remove(f);
+    e.db && e.remove(g);
   }
 }
-;function ib(a, b, c, d, e, f, g) {
+;function jb(a, b, c, d, e, g, f) {
   var h = a.length, k = [], l;
   var m = J();
   for (var n = 0, p = void 0, q; n < b; n++) {
@@ -1653,8 +1668,8 @@ function gb(a, b, c, d, e, f, g, h) {
           q = p[x];
           (l = m[q]) ? m[q]++ : (l = 0, m[q] = 1);
           l = k[l] || (k[l] = []);
-          if (!g) {
-            var r = n + (t || !e ? 0 : f || 0);
+          if (!f) {
+            var r = n + (t || !e ? 0 : g || 0);
             l = l[r] || (l[r] = []);
           }
           l.push(q);
@@ -1664,27 +1679,27 @@ function gb(a, b, c, d, e, f, g, h) {
   }
   if (a = k.length) {
     if (e) {
-      k = 1 < k.length ? jb(k, c, d, g, f) : (k = k[0]).length > c || d ? k.slice(d, c + d) : k;
+      k = 1 < k.length ? kb(k, c, d, f, g) : (k = k[0]).length > c || d ? k.slice(d, c + d) : k;
     } else {
       if (a < h) {
         return [];
       }
       k = k[a - 1];
       if (c || d) {
-        if (g) {
+        if (f) {
           if (k.length > c || d) {
             k = k.slice(d, c + d);
           }
         } else {
           e = [];
-          for (f = 0; f < k.length; f++) {
-            if (g = k[f], g.length > d) {
-              d -= g.length;
+          for (g = 0; g < k.length; g++) {
+            if (f = k[g], f.length > d) {
+              d -= f.length;
             } else {
-              if (g.length > c || d) {
-                g = g.slice(d, c + d), c -= g.length, d && (d -= g.length);
+              if (f.length > c || d) {
+                f = f.slice(d, c + d), c -= f.length, d && (d -= f.length);
               }
-              e.push(g);
+              e.push(f);
               if (!c) {
                 break;
               }
@@ -1697,19 +1712,19 @@ function gb(a, b, c, d, e, f, g, h) {
   }
   return k;
 }
-function jb(a, b, c, d, e) {
-  var f = [], g = J(), h = a.length, k;
+function kb(a, b, c, d, e) {
+  var g = [], f = J(), h = a.length, k;
   if (d) {
     for (e = h - 1; 0 <= e; e--) {
       if (k = (d = a[e]) && d.length) {
         for (h = 0; h < k; h++) {
           var l = d[h];
-          if (!g[l]) {
-            if (g[l] = 1, c) {
+          if (!f[l]) {
+            if (f[l] = 1, c) {
               c--;
             } else {
-              if (f.push(l), f.length === b) {
-                return f;
+              if (g.push(l), g.length === b) {
+                return g;
               }
             }
           }
@@ -1722,14 +1737,14 @@ function jb(a, b, c, d, e) {
       for (var q = 0; q < n.length; q++) {
         if (k = (d = n[q]) && d.length) {
           for (var t = 0; t < k; t++) {
-            if (l = d[t], !g[l]) {
-              if (g[l] = 1, c) {
+            if (l = d[t], !f[l]) {
+              if (f[l] = 1, c) {
                 c--;
               } else {
                 var x = (q + (m < h - 1 ? e || 0 : 0)) / (m + 1) | 0;
-                (f[x] || (f[x] = [])).push(l);
+                (g[x] || (g[x] = [])).push(l);
                 if (++p === b) {
-                  return f;
+                  return g;
                 }
               }
             }
@@ -1738,13 +1753,13 @@ function jb(a, b, c, d, e) {
       }
     }
   }
-  return f;
+  return g;
 }
-function kb(a, b, c) {
-  for (var d = J(), e = [], f = 0, g; f < b.length; f++) {
-    g = b[f];
-    for (var h = 0; h < g.length; h++) {
-      d[g[h]] = 1;
+function lb(a, b, c) {
+  for (var d = J(), e = [], g = 0, f; g < b.length; g++) {
+    f = b[g];
+    for (var h = 0; h < f.length; h++) {
+      d[f[h]] = 1;
     }
   }
   if (c) {
@@ -1753,34 +1768,34 @@ function kb(a, b, c) {
     }
   } else {
     for (b = 0; b < a.result.length; b++) {
-      for (c = a.result[b], g = 0; g < c.length; g++) {
-        f = c[g], d[f] && ((e[b] || (e[b] = [])).push(f), d[f] = 0);
+      for (c = a.result[b], f = 0; f < c.length; f++) {
+        g = c[f], d[g] && ((e[b] || (e[b] = [])).push(g), d[g] = 0);
       }
     }
   }
   return e;
 }
-;function lb(a, b, c, d) {
+;function mb(a, b, c, d) {
   if (!a.length) {
     return a;
   }
   if (1 === a.length) {
-    return a = a[0], a = c || a.length > b ? b ? a.slice(c, c + b) : a.slice(c) : a, d ? W.call(this, a) : a;
+    return a = a[0], a = c || a.length > b ? b ? a.slice(c, c + b) : a.slice(c) : a, d ? X.call(this, a) : a;
   }
-  for (var e = [], f = 0, g = void 0, h = void 0; f < a.length; f++) {
-    if ((g = a[f]) && (h = g.length)) {
+  for (var e = [], g = 0, f = void 0, h = void 0; g < a.length; g++) {
+    if ((f = a[g]) && (h = f.length)) {
       if (c) {
         if (c >= h) {
           c -= h;
           continue;
         }
-        c < h && (g = b ? g.slice(c, c + b) : g.slice(c), h = g.length, c = 0);
+        c < h && (f = b ? f.slice(c, c + b) : f.slice(c), h = f.length, c = 0);
       }
-      h > b && (g = g.slice(0, b), h = b);
+      h > b && (f = f.slice(0, b), h = b);
       if (!e.length && h >= b) {
-        return d ? W.call(this, g) : g;
+        return d ? X.call(this, f) : f;
       }
-      e.push(g);
+      e.push(f);
       b -= h;
       if (!b) {
         break;
@@ -1788,9 +1803,9 @@ function kb(a, b, c) {
     }
   }
   e = 1 < e.length ? [].concat.apply([], e) : e[0];
-  return d ? W.call(this, e) : e;
+  return d ? X.call(this, e) : e;
 }
-;function mb(a, b, c) {
+;function nb(a, b, c) {
   var d = c[0];
   if (d.then) {
     return Promise.all(c).then(function(q) {
@@ -1801,15 +1816,15 @@ function kb(a, b, c) {
     return a[b].apply(a, d);
   }
   d = [];
-  for (var e = [], f = 0, g = 0, h, k, l, m = 0, n = void 0; m < c.length; m++) {
+  for (var e = [], g = 0, f = 0, h, k, l, m = 0, n = void 0; m < c.length; m++) {
     if (n = c[m]) {
       var p = void 0;
-      if (n.constructor === X) {
+      if (n.constructor === Y) {
         p = n.result;
       } else if (n.constructor === Array) {
         p = n;
       } else {
-        if (f = n.limit || 0, g = n.offset || 0, l = n.suggest, k = n.resolve, h = n.enrich && k, n.index) {
+        if (g = n.limit || 0, f = n.offset || 0, l = n.suggest, k = n.resolve, h = n.enrich && k, n.index) {
           n.resolve = !1, n.enrich = !1, p = n.index.search(n).result, n.resolve = k, n.enrich = h;
         } else if (n.and) {
           p = a.and(n.and);
@@ -1833,27 +1848,27 @@ function kb(a, b, c) {
       }
     }
   }
-  return {W:d, $:e, limit:f, offset:g, enrich:h, resolve:k, suggest:l};
+  return {W:d, $:e, limit:g, offset:f, enrich:h, resolve:k, suggest:l};
 }
-;X.prototype.or = function() {
-  var a = mb(this, "or", arguments);
-  return nb.call(this, a.W, a.$, a.limit, a.offset, a.enrich, a.resolve);
+;Y.prototype.or = function() {
+  var a = nb(this, "or", arguments);
+  return ob.call(this, a.W, a.$, a.limit, a.offset, a.enrich, a.resolve);
 };
-function nb(a, b, c, d, e, f) {
+function ob(a, b, c, d, e, g) {
   if (b.length) {
-    var g = this;
+    var f = this;
     return Promise.all(b).then(function(h) {
       a = [];
       for (var k = 0, l = void 0; k < h.length; k++) {
         (l = h[k]).length && (a[k] = l);
       }
-      return nb.call(g, a, [], c, d, e, f);
+      return ob.call(f, a, [], c, d, e, g);
     });
   }
-  a.length && (this.result.length && a.push(this.result), 2 > a.length ? this.result = a[0] : (this.result = jb(a, c, d, !1, this.h), d = 0));
-  return f ? this.resolve(c, d, e) : this;
+  a.length && (this.result.length && a.push(this.result), 2 > a.length ? this.result = a[0] : (this.result = kb(a, c, d, !1, this.h), d = 0));
+  return g ? this.resolve(c, d, e) : this;
 }
-;X.prototype.and = function() {
+;Y.prototype.and = function() {
   var a = this.result.length;
   if (!a) {
     var b = arguments[0];
@@ -1862,12 +1877,12 @@ function nb(a, b, c, d, e, f) {
       var c = b.resolve;
       var d = b.limit;
       var e = b.offset;
-      var f = b.enrich && c;
+      var g = b.enrich && c;
     }
   }
-  return a ? (a = mb(this, "and", arguments), ob.call(this, a.W, a.$, a.limit, a.offset, a.enrich, a.resolve, a.suggest)) : c ? this.resolve(d, e, f) : this;
+  return a ? (a = nb(this, "and", arguments), pb.call(this, a.W, a.$, a.limit, a.offset, a.enrich, a.resolve, a.suggest)) : c ? this.resolve(d, e, g) : this;
 };
-function ob(a, b, c, d, e, f, g) {
+function pb(a, b, c, d, e, g, f) {
   if (b.length) {
     var h = this;
     return Promise.all(b).then(function(k) {
@@ -1875,7 +1890,7 @@ function ob(a, b, c, d, e, f, g) {
       for (var l = 0, m = void 0; l < k.length; l++) {
         (m = k[l]).length && (a[l] = m);
       }
-      return ob.call(h, a, [], c, d, e, f, g);
+      return pb.call(h, a, [], c, d, e, g, f);
     });
   }
   if (a.length) {
@@ -1883,20 +1898,20 @@ function ob(a, b, c, d, e, f, g) {
       this.result = a[0];
     } else {
       if (b = za(a)) {
-        return this.result = ib(a, b, c, d, g, this.h, f), f ? e ? W.call(this.index, this.result) : this.result : this;
+        return this.result = jb(a, b, c, d, f, this.h, g), g ? e ? X.call(this.index, this.result) : this.result : this;
       }
       this.result = [];
     }
   } else {
-    g || (this.result = a);
+    f || (this.result = a);
   }
-  return f ? this.resolve(c, d, e) : this;
+  return g ? this.resolve(c, d, e) : this;
 }
-;X.prototype.xor = function() {
-  var a = mb(this, "xor", arguments);
-  return pb.call(this, a.W, a.$, a.limit, a.offset, a.enrich, a.resolve, a.suggest);
+;Y.prototype.xor = function() {
+  var a = nb(this, "xor", arguments);
+  return qb.call(this, a.W, a.$, a.limit, a.offset, a.enrich, a.resolve, a.suggest);
 };
-function pb(a, b, c, d, e, f, g) {
+function qb(a, b, c, d, e, g, f) {
   if (b.length) {
     var h = this;
     return Promise.all(b).then(function(k) {
@@ -1904,28 +1919,28 @@ function pb(a, b, c, d, e, f, g) {
       for (var l = 0, m = void 0; l < k.length; l++) {
         (m = k[l]).length && (a[l] = m);
       }
-      return pb.call(h, a, [], c, d, e, f, g);
+      return qb.call(h, a, [], c, d, e, g, f);
     });
   }
   if (a.length) {
     if (this.result.length && a.unshift(this.result), 2 > a.length) {
       this.result = a[0];
     } else {
-      return this.result = qb.call(this, a, c, d, f, this.h), f ? e ? W.call(this.index, this.result) : this.result : this;
+      return this.result = rb.call(this, a, c, d, g, this.h), g ? e ? X.call(this.index, this.result) : this.result : this;
     }
   } else {
-    g || (this.result = a);
+    f || (this.result = a);
   }
-  return f ? this.resolve(c, d, e) : this;
+  return g ? this.resolve(c, d, e) : this;
 }
-function qb(a, b, c, d, e) {
-  for (var f = [], g = J(), h = 0, k = 0, l; k < a.length; k++) {
+function rb(a, b, c, d, e) {
+  for (var g = [], f = J(), h = 0, k = 0, l; k < a.length; k++) {
     if (l = a[k]) {
       h < l.length && (h = l.length);
       for (var m = 0, n; m < l.length; m++) {
         if (n = l[m]) {
           for (var p = 0, q; p < n.length; p++) {
-            q = n[p], g[q] = g[q] ? 2 : 1;
+            q = n[p], f[q] = f[q] ? 2 : 1;
           }
         }
       }
@@ -1936,20 +1951,20 @@ function qb(a, b, c, d, e) {
       if (n = a[m]) {
         if (n = n[k]) {
           for (p = 0; p < n.length; p++) {
-            if (q = n[p], 1 === g[q]) {
+            if (q = n[p], 1 === f[q]) {
               if (c) {
                 c--;
               } else {
                 if (d) {
-                  if (f.push(q), f.length === b) {
-                    return f;
+                  if (g.push(q), g.length === b) {
+                    return g;
                   }
                 } else {
                   var t = k + (m ? e : 0);
-                  f[t] || (f[t] = []);
-                  f[t].push(q);
+                  g[t] || (g[t] = []);
+                  g[t].push(q);
                   if (++l === b) {
-                    return f;
+                    return g;
                   }
                 }
               }
@@ -1959,13 +1974,13 @@ function qb(a, b, c, d, e) {
       }
     }
   }
-  return f;
+  return g;
 }
-;X.prototype.not = function() {
-  var a = mb(this, "not", arguments);
-  return rb.call(this, a.W, a.$, a.limit, a.offset, a.enrich, a.resolve, a.suggest);
+;Y.prototype.not = function() {
+  var a = nb(this, "not", arguments);
+  return sb.call(this, a.W, a.$, a.limit, a.offset, a.enrich, a.resolve, a.suggest);
 };
-function rb(a, b, c, d, e, f, g) {
+function sb(a, b, c, d, e, g, f) {
   if (b.length) {
     var h = this;
     return Promise.all(b).then(function(k) {
@@ -1973,23 +1988,23 @@ function rb(a, b, c, d, e, f, g) {
       for (var l = 0, m = void 0; l < k.length; l++) {
         (m = k[l]).length && (a[l] = m);
       }
-      return rb.call(h, a, [], c, d, e, f, g);
+      return sb.call(h, a, [], c, d, e, g, f);
     });
   }
   if (a.length && this.result.length) {
-    this.result = sb.call(this, a, c, d, f);
-  } else if (f) {
+    this.result = tb.call(this, a, c, d, g);
+  } else if (g) {
     return this.resolve(c, d, e);
   }
-  return f ? e ? W.call(this.index, this.result) : this.result : this;
+  return g ? e ? X.call(this.index, this.result) : this.result : this;
 }
-function sb(a, b, c, d) {
+function tb(a, b, c, d) {
   var e = [];
   a = new Set(a.flat().flat());
-  for (var f = 0, g, h = 0; f < this.result.length; f++) {
-    if (g = this.result[f]) {
-      for (var k = 0, l; k < g.length; k++) {
-        if (l = g[k], !a.has(l)) {
+  for (var g = 0, f, h = 0; g < this.result.length; g++) {
+    if (f = this.result[g]) {
+      for (var k = 0, l; k < f.length; k++) {
+        if (l = f[k], !a.has(l)) {
           if (c) {
             c--;
           } else {
@@ -1998,7 +2013,7 @@ function sb(a, b, c, d) {
                 return e;
               }
             } else {
-              if (e[f] || (e[f] = []), e[f].push(l), ++h === b) {
+              if (e[g] || (e[g] = []), e[g].push(l), ++h === b) {
                 return e;
               }
             }
@@ -2009,9 +2024,9 @@ function sb(a, b, c, d) {
   }
   return e;
 }
-;function X(a) {
-  if (!this || this.constructor !== X) {
-    return new X(a);
+;function Y(a) {
+  if (!this || this.constructor !== Y) {
+    return new Y(a);
   }
   if (a && a.index) {
     return a.resolve = !1, this.index = a.index, this.h = a.boost || 0, this.result = a.index.search(a).result, this;
@@ -2020,7 +2035,7 @@ function sb(a, b, c, d) {
   this.result = a || [];
   this.h = 0;
 }
-X.prototype.limit = function(a) {
+Y.prototype.limit = function(a) {
   if (this.result.length) {
     for (var b = [], c = 0, d; c < this.result.length; c++) {
       if (d = this.result[c]) {
@@ -2038,7 +2053,7 @@ X.prototype.limit = function(a) {
   }
   return this;
 };
-X.prototype.offset = function(a) {
+Y.prototype.offset = function(a) {
   if (this.result.length) {
     for (var b = [], c = 0, d; c < this.result.length; c++) {
       if (d = this.result[c]) {
@@ -2049,19 +2064,19 @@ X.prototype.offset = function(a) {
   }
   return this;
 };
-X.prototype.boost = function(a) {
+Y.prototype.boost = function(a) {
   this.h += a;
   return this;
 };
-X.prototype.resolve = function(a, b, c) {
+Y.prototype.resolve = function(a, b, c) {
   var d = this.result, e = this.index;
   this.result = this.index = null;
-  return d.length ? ("object" === typeof a && (c = a.enrich, b = a.offset, a = a.limit), lb.call(e, d, a || 100, b, c)) : d;
+  return d.length ? ("object" === typeof a && (c = a.enrich, b = a.offset, a = a.limit), mb.call(e, d, a || 100, b, c)) : d;
 };
 J();
-V.prototype.search = function(a, b, c, d) {
+W.prototype.search = function(a, b, c, d) {
   c || (!b && M(a) ? (c = a, a = "") : M(b) && (c = b, b = 0));
-  var e = [], f = [], g = 0;
+  var e = [], g = [], f = 0;
   if (c) {
     c.constructor === Array && (c = {index:c});
     a = c.query || a;
@@ -2122,19 +2137,19 @@ V.prototype.search = function(a, b, c, d) {
       if (!a) {
         p = [];
         if (r.length) {
-          for (f = 0; f < r.length; f += 2) {
+          for (g = 0; g < r.length; g += 2) {
             h = void 0;
             if (this.db) {
-              h = this.index.get(r[f]);
+              h = this.index.get(r[g]);
               if (!h) {
-                console.warn("Tag '" + r[f] + ":" + r[f + 1] + "' will be skipped because there is no field '" + r[f] + "'.");
+                console.warn("Tag '" + r[g] + ":" + r[g + 1] + "' will be skipped because there is no field '" + r[g] + "'.");
                 continue;
               }
-              p.push(h = h.db.tag(r[f + 1], b, x, q));
+              p.push(h = h.db.tag(r[g + 1], b, x, q));
             } else {
-              h = tb.call(this, r[f], r[f + 1], b, x, q);
+              h = ub.call(this, r[g], r[g + 1], b, x, q);
             }
-            e.push({field:r[f], tag:r[f + 1], result:h});
+            e.push({field:r[g], tag:r[g + 1], result:h});
           }
         }
         return p.length ? Promise.all(p).then(function(P) {
@@ -2162,10 +2177,10 @@ V.prototype.search = function(a, b, c, d) {
         if (m) {
           if (this.db) {
             y.tag = m;
-            var Ha = v.db.support_tag_search;
+            var Ka = v.db.support_tag_search;
             y.field = l;
           }
-          Ha || (y.enrich = !1);
+          Ka || (y.enrich = !1);
         }
         if (r) {
           r[A] = v.search(a, b, y);
@@ -2180,115 +2195,115 @@ V.prototype.search = function(a, b, c, d) {
         D = [];
         F = 0;
         if (this.db && d) {
-          if (!Ha) {
+          if (!Ka) {
             for (G = l.length; G < d.length; G++) {
               var L = d[G];
               if (L && L.length) {
                 F++, D.push(L);
               } else if (!n) {
-                return p ? e : new X(e);
+                return p ? e : new Y(e);
               }
             }
           }
         } else {
           G = 0;
-          for (var Vb = L = void 0; G < m.length; G += 2) {
+          for (var Xb = L = void 0; G < m.length; G += 2) {
             L = this.tag.get(m[G]);
             if (!L) {
               if (console.warn("Tag '" + m[G] + ":" + m[G + 1] + "' will be skipped because there is no field '" + m[G] + "'."), n) {
                 continue;
               } else {
-                return p ? e : new X(e);
+                return p ? e : new Y(e);
               }
             }
-            if (Vb = (L = L && L.get(m[G + 1])) && L.length) {
+            if (Xb = (L = L && L.get(m[G + 1])) && L.length) {
               F++, D.push(L);
             } else if (!n) {
-              return p ? e : new X(e);
+              return p ? e : new Y(e);
             }
           }
         }
         if (F) {
-          v = kb(v, D, p);
+          v = lb(v, D, p);
           y = v.length;
           if (!y && !n) {
-            return p ? v : new X(v);
+            return p ? v : new Y(v);
           }
           F--;
         }
       }
       if (y) {
-        f[g] = z, e.push(v), g++;
+        g[f] = z, e.push(v), f++;
       } else if (1 === l.length) {
-        return p ? e : new X(e);
+        return p ? e : new Y(e);
       }
     }
   }
   if (r) {
-    if (this.db && m && m.length && !Ha) {
+    if (this.db && m && m.length && !Ka) {
       for (q = 0; q < m.length; q += 2) {
-        f = this.index.get(m[q]);
-        if (!f) {
+        g = this.index.get(m[q]);
+        if (!g) {
           if (console.warn("Tag '" + m[q] + ":" + m[q + 1] + "' was not found because there is no field '" + m[q] + "'."), n) {
             continue;
           } else {
-            return p ? e : new X(e);
+            return p ? e : new Y(e);
           }
         }
-        r.push(f.db.tag(m[q + 1], b, x, !1));
+        r.push(g.db.tag(m[q + 1], b, x, !1));
       }
     }
-    var Wb = this;
+    var Yb = this;
     return Promise.all(r).then(function(P) {
-      return P.length ? Wb.search(a, b, c, P) : P;
+      return P.length ? Yb.search(a, b, c, P) : P;
     });
   }
-  if (!g) {
-    return p ? e : new X(e);
+  if (!f) {
+    return p ? e : new Y(e);
   }
   if (h && (!q || !this.store)) {
     return e[0];
   }
   r = [];
   x = 0;
-  for (n = void 0; x < f.length; x++) {
+  for (n = void 0; x < g.length; x++) {
     n = e[x];
-    q && n.length && !n[0].doc && (this.db ? r.push(n = this.index.get(this.field[0]).db.enrich(n)) : n = W.call(this, n));
+    q && n.length && !n[0].doc && (this.db ? r.push(n = this.index.get(this.field[0]).db.enrich(n)) : n = X.call(this, n));
     if (h) {
-      return p ? n : new X(n);
+      return p ? n : new Y(n);
     }
-    e[x] = {field:f[x], result:n};
+    e[x] = {field:g[x], result:n};
   }
   if (q && this.db && r.length) {
-    var Ia = this;
+    var La = this;
     return Promise.all(r).then(function(P) {
       for (var Q = 0; Q < P.length; Q++) {
         e[Q].result = P[Q];
       }
-      return k ? ub(e, b) : t ? vb(e, a, Ia.index, Ia.field, Ia.J, t) : e;
+      return k ? vb(e, b) : t ? wb(e, a, La.index, La.field, La.J, t) : e;
     });
   }
-  return k ? ub(e, b) : t ? vb(e, a, this.index, this.field, this.J, t) : e;
+  return k ? vb(e, b) : t ? wb(e, a, this.index, this.field, this.J, t) : e;
 };
-function vb(a, b, c, d, e, f) {
-  for (var g, h, k, l = 0, m, n, p; l < a.length; l++) {
-    for (m = a[l].result, n = a[l].field, k = c.get(n), p = k.encoder, k = k.tokenize, n = e[d.indexOf(n)], p !== g && (g = p, h = g.encode(b)), p = 0; p < m.length; p++) {
-      var q = "", t = ya(m[p].doc, n), x = g.encode(t);
-      t = t.split(g.split);
+function wb(a, b, c, d, e, g) {
+  for (var f, h, k, l = 0, m, n, p; l < a.length; l++) {
+    for (m = a[l].result, n = a[l].field, k = c.get(n), p = k.encoder, k = k.tokenize, n = e[d.indexOf(n)], p !== f && (f = p, h = f.encode(b)), p = 0; p < m.length; p++) {
+      var q = "", t = ya(m[p].doc, n), x = f.encode(t);
+      t = t.split(f.split);
       for (var r = 0, A, z; r < x.length; r++) {
         A = x[r];
         z = t[r];
         for (var v = void 0, y = 0, D; y < h.length; y++) {
           if (D = h[y], "strict" === k) {
             if (A === D) {
-              q += (q ? " " : "") + f.replace("$1", z);
+              q += (q ? " " : "") + g.replace("$1", z);
               v = !0;
               break;
             }
           } else {
             var F = A.indexOf(D);
             if (-1 < F) {
-              q += (q ? " " : "") + z.substring(0, F) + f.replace("$1", z.substring(F, D.length)) + z.substring(F + D.length);
+              q += (q ? " " : "") + z.substring(0, F) + g.replace("$1", z.substring(F, D.length)) + z.substring(F + D.length);
               v = !0;
               break;
             }
@@ -2301,38 +2316,38 @@ function vb(a, b, c, d, e, f) {
   }
   return a;
 }
-function ub(a, b) {
-  for (var c = [], d = J(), e = 0, f, g; e < a.length; e++) {
-    f = a[e];
-    g = f.result;
-    for (var h = 0, k, l, m; h < g.length; h++) {
-      if (l = g[h], k = l.id, m = d[k]) {
-        m.push(f.field);
+function vb(a, b) {
+  for (var c = [], d = J(), e = 0, g, f; e < a.length; e++) {
+    g = a[e];
+    f = g.result;
+    for (var h = 0, k, l, m; h < f.length; h++) {
+      if (l = f[h], k = l.id, m = d[k]) {
+        m.push(g.field);
       } else {
         if (c.length === b) {
           return c;
         }
-        l.field = d[k] = [f.field];
+        l.field = d[k] = [g.field];
         c.push(l);
       }
     }
   }
   return c;
 }
-function tb(a, b, c, d, e) {
-  var f = this.tag.get(a);
-  if (!f) {
+function ub(a, b, c, d, e) {
+  var g = this.tag.get(a);
+  if (!g) {
     return console.warn("Tag '" + a + "' was not found"), [];
   }
-  if ((a = (f = f && f.get(b)) && f.length - d) && 0 < a) {
+  if ((a = (g = g && g.get(b)) && g.length - d) && 0 < a) {
     if (a > c || d) {
-      f = f.slice(d, d + c);
+      g = g.slice(d, d + c);
     }
-    e && (f = W.call(this, f));
-    return f;
+    e && (g = X.call(this, g));
+    return g;
   }
 }
-function W(a) {
+function X(a) {
   if (!this || !this.store) {
     return a;
   }
@@ -2341,23 +2356,23 @@ function W(a) {
   }
   return b;
 }
-;function V(a) {
-  if (!this || this.constructor !== V) {
-    return new V(a);
+;function W(a) {
+  if (!this || this.constructor !== W) {
+    return new W(a);
   }
   var b = a.document || a.doc || a, c, d;
   this.J = [];
   this.field = [];
   this.S = [];
-  this.key = (c = b.key || b.id) && wb(c, this.S) || "id";
+  this.key = (c = b.key || b.id) && xb(c, this.S) || "id";
   (d = a.keystore || 0) && (this.keystore = d);
-  this.reg = (this.fastupdate = !!a.fastupdate) ? d ? new T(d) : new Map() : d ? new U(d) : new Set();
+  this.reg = (this.fastupdate = !!a.fastupdate) ? d ? new U(d) : new Map() : d ? new V(d) : new Set();
   this.I = (c = b.store || null) && c && !0 !== c && [];
-  this.store = c && (d ? new T(d) : new Map());
-  this.cache = (c = a.cache || null) && new Y(c);
+  this.store = c && (d ? new U(d) : new Map());
+  this.cache = (c = a.cache || null) && new Z(c);
   a.cache = !1;
   this.worker = a.worker;
-  this.index = xb.call(this, a, b);
+  this.index = yb.call(this, a, b);
   this.tag = null;
   if (c = b.tag) {
     if ("string" === typeof c && (c = [c]), c.length) {
@@ -2371,7 +2386,7 @@ function W(a) {
         if (!e) {
           throw Error("The tag field from the document descriptor is undefined.");
         }
-        d.custom ? this.L[b] = d.custom : (this.L[b] = wb(e, this.S), d.filter && ("string" === typeof this.L[b] && (this.L[b] = new String(this.L[b])), this.L[b].R = d.filter));
+        d.custom ? this.L[b] = d.custom : (this.L[b] = xb(e, this.S), d.filter && ("string" === typeof this.L[b] && (this.L[b] = new String(this.L[b])), this.L[b].R = d.filter));
         this.aa[b] = e;
         this.tag.set(e, new Map());
       }
@@ -2384,28 +2399,28 @@ function W(a) {
       b = b.value, b.then && a.push(b);
     }
     if (a.length) {
-      var f = this;
-      return Promise.all(a).then(function(g) {
-        for (var h = 0, k = w(f.index.entries()), l = k.next(); !l.done; l = k.next()) {
+      var g = this;
+      return Promise.all(a).then(function(f) {
+        for (var h = 0, k = w(g.index.entries()), l = k.next(); !l.done; l = k.next()) {
           l = l.value;
           var m = l[0];
-          l[1].then && f.index.set(m, g[h++]);
+          l[1].then && g.index.set(m, f[h++]);
         }
-        return f;
+        return g;
       });
     }
   } else {
     a.db && this.mount(a.db);
   }
 }
-u = V.prototype;
+u = W.prototype;
 u.mount = function(a) {
   var b = this.field;
   if (this.tag) {
     for (var c = 0, d; c < this.aa.length; c++) {
       d = this.aa[c];
       var e;
-      this.index.set(d, e = new O({}, this.reg));
+      this.index.set(d, e = new R({}, this.reg));
       b === this.field && (b = b.slice(0));
       b.push(d);
       e.tag = this.tag.get(d);
@@ -2414,26 +2429,26 @@ u.mount = function(a) {
   c = [];
   d = {db:a.db, type:a.type, fastupdate:a.fastupdate};
   e = 0;
-  for (var f; e < b.length; e++) {
-    d.field = f = b[e];
-    f = this.index.get(f);
-    var g = new a.constructor(a.id, d);
-    g.id = a.id;
-    c[e] = g.mount(f);
-    f.document = !0;
-    e ? f.bypass = !0 : f.store = this.store;
+  for (var g; 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;
   }
   this.db = !0;
   return Promise.all(c);
 };
 u.commit = function(a, b) {
-  var c = this, d, e, f, g;
+  var c = this, d, e, g, f;
   return ta(function(h) {
     if (1 == h.h) {
       d = [];
       e = w(c.index.values());
-      for (f = e.next(); !f.done; f = e.next()) {
-        g = f.value, d.push(g.db.commit(g, a, b));
+      for (g = e.next(); !g.done; g = e.next()) {
+        f = g.value, d.push(f.db.commit(f, a, b));
       }
       return E(h, Promise.all(d), 2);
     }
@@ -2447,29 +2462,29 @@ u.destroy = function() {
   }
   return Promise.all(a);
 };
-function xb(a, b) {
+function yb(a, b) {
   var c = new Map(), d = b.index || b.field || b;
   K(d) && (d = [d]);
-  for (var e = 0, f, g = void 0; e < d.length; e++) {
-    f = d[e];
-    K(f) || (g = f, f = f.field);
-    g = M(g) ? Object.assign({}, a, g) : a;
+  for (var e = 0, g, f = void 0; e < d.length; e++) {
+    g = d[e];
+    K(g) || (f = g, g = g.field);
+    f = M(f) ? Object.assign({}, a, f) : a;
     if (this.worker) {
-      var h = new R(g);
-      c.set(f, h);
+      var h = new S(f);
+      c.set(g, h);
     }
-    this.worker || c.set(f, new O(g, this.reg));
-    g.custom ? this.J[e] = g.custom : (this.J[e] = wb(f, this.S), g.filter && ("string" === typeof this.J[e] && (this.J[e] = new String(this.J[e])), this.J[e].R = g.filter));
-    this.field[e] = f;
+    this.worker || c.set(g, new R(f, this.reg));
+    f.custom ? this.J[e] = f.custom : (this.J[e] = xb(g, this.S), f.filter && ("string" === typeof this.J[e] && (this.J[e] = new String(this.J[e])), this.J[e].R = f.filter));
+    this.field[e] = g;
   }
   if (this.I) {
     for (a = b.store, K(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] = wb(e, this.S), d.filter && ("string" === typeof this.I[b] && (this.I[b] = new String(this.I[b])), this.I[b].R = d.filter));
+      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 wb(a, b) {
+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);
   }
@@ -2492,11 +2507,11 @@ u.remove = function(a) {
       for (b = w(this.tag.values()), c = b.next(); !c.done; c = b.next()) {
         c = c.value;
         for (var d = w(c), e = d.next(); !e.done; e = d.next()) {
-          var f = e.value;
-          e = f[0];
-          f = f[1];
-          var g = f.indexOf(a);
-          -1 < g && (1 < f.length ? f.splice(g, 1) : c.delete(e));
+          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));
         }
       }
     }
@@ -2536,44 +2551,44 @@ u.set = function(a, b) {
   this.store.set(a, b);
   return this;
 };
-u.searchCache = yb;
+u.searchCache = zb;
 u.export = function(a, b, c, d) {
   c = void 0 === c ? 0 : c;
   d = void 0 === d ? 0 : d;
   if (c < this.field.length) {
     var e = this.field[c];
     if ((b = this.index.get(e).export(a, e, c, d = 1)) && b.then) {
-      var f = this;
+      var g = this;
       return b.then(function() {
-        return f.export(a, e, c + 1);
+        return g.export(a, e, c + 1);
       });
     }
     return this.export(a, e, c + 1);
   }
   switch(d) {
     case 0:
-      var g = "reg";
+      var f = "reg";
       var h = Ya(this.reg);
       b = null;
       break;
     case 1:
-      g = "tag";
+      f = "tag";
       h = Wa(this.tag, this.reg.size);
       b = null;
       break;
     case 2:
-      g = "doc";
+      f = "doc";
       h = Ua(this.store);
       b = null;
       break;
     case 3:
-      g = "cfg";
+      f = "cfg";
       b = h = null;
       break;
     default:
       return;
   }
-  return $a.call(this, a, b, g, h, c, d);
+  return $a.call(this, a, b, f, h, c, d);
 };
 u.import = function(a, b) {
   if (b) {
@@ -2601,91 +2616,91 @@ u.import = function(a, b) {
     }
   }
 };
-Na(V.prototype);
-function yb(a, b, c) {
+Ja(W.prototype);
+function zb(a, b, c) {
   a = ("object" === typeof a ? "" + a.query : a).toLowerCase();
-  this.cache || (this.cache = new Y());
+  this.cache || (this.cache = new Z());
   var d = this.cache.get(a);
   if (!d) {
     d = this.search(a, b, c);
     if (d.then) {
       var e = this;
-      d.then(function(f) {
-        e.cache.set(a, f);
-        return f;
+      d.then(function(g) {
+        e.cache.set(a, g);
+        return g;
       });
     }
     this.cache.set(a, d);
   }
   return d;
 }
-function Y(a) {
+function Z(a) {
   this.limit = a && !0 !== a ? a : 1000;
   this.cache = new Map();
   this.h = "";
 }
-Y.prototype.set = function(a, b) {
+Z.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);
 };
-Y.prototype.get = function(a) {
+Z.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;
 };
-Y.prototype.remove = function(a) {
+Z.prototype.remove = function(a) {
   for (var b = w(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);
   }
 };
-Y.prototype.clear = function() {
+Z.prototype.clear = function() {
   this.cache.clear();
   this.h = "";
 };
-var zb = {normalize:function(a) {
+var Ab = {normalize:function(a) {
   return a.toLowerCase();
 }};
-var Ab = 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 Bb = new Map([["ae", "a"], ["oe", "o"], ["sh", "s"], ["kh", "k"], ["th", "t"], ["pf", "f"]]), Cb = [/([^aeo])h(.)/g, "$1$2", /([aeo])h([^aeo]|$)/g, "$1$2", /([^0-9])\1+/g, "$1"];
-var Db = {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 Eb = /[\x00-\x7F]+/g;
+var Bb = 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 Cb = new Map([["ae", "a"], ["oe", "o"], ["sh", "s"], ["kh", "k"], ["th", "t"], ["pf", "f"]]), Db = [/([^aeo])h(.)/g, "$1$2", /([aeo])h([^aeo]|$)/g, "$1$2", /([^0-9])\1+/g, "$1"];
+var Eb = {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 Fb = /[\x00-\x7F]+/g;
 var Gb = /[\x00-\x7F]+/g;
-var Hb = {LatinExact:{normalize:!1, dedupe:!1}, LatinDefault:zb, LatinSimple:{normalize:!0, dedupe:!0}, LatinBalance:{normalize:!0, dedupe:!0, mapper:Ab}, LatinAdvanced:{normalize:!0, dedupe:!0, mapper:Ab, matcher:Bb, replacer:Cb}, LatinExtra:{normalize:!0, dedupe:!0, mapper:Ab, replacer:Cb.concat([/(?!^)[aeo]/g, ""]), matcher:Bb}, LatinSoundex:{normalize:!0, dedupe:!1, include:{letter:!0}, finalize:function(a) {
+var Hb = /[\x00-\x7F]+/g;
+var Ib = {LatinExact:{normalize:!1, dedupe:!1}, LatinDefault:Ab, LatinSimple:{normalize:!0, dedupe:!0}, LatinBalance:{normalize:!0, dedupe:!0, mapper:Bb}, LatinAdvanced:{normalize:!0, dedupe:!0, mapper:Bb, matcher:Cb, replacer:Db}, LatinExtra:{normalize:!0, dedupe:!0, mapper:Bb, replacer:Db.concat([/(?!^)[aeo]/g, ""]), matcher:Cb}, LatinSoundex:{normalize:!0, dedupe:!1, include:{letter:!0}, finalize:function(a) {
   for (var b = 0; b < a.length; b++) {
-    for (var c = a[b], d = c.charAt(0), e = Db[d], f = 1, g; f < c.length && (g = c.charAt(f), "h" === g || "w" === g || !(g = Db[g]) || g === e || (d += g, e = g, 4 !== d.length)); f++) {
+    for (var c = a[b], d = c.charAt(0), e = Eb[d], g = 1, f; g < c.length && (f = c.charAt(g), "h" === f || "w" === f || !(f = Eb[f]) || f === e || (d += f, e = f, 4 !== d.length)); g++) {
     }
     a[b] = d;
   }
 }}, ArabicDefault:{rtl:!0, normalize:!1, dedupe:!0, prepare:function(a) {
-  return ("" + a).replace(Eb, " ");
+  return ("" + a).replace(Fb, " ");
 }}, CjkDefault:{normalize:!1, dedupe:!0, split:"", prepare:function(a) {
-  return ("" + a).replace(Fb, "");
+  return ("" + a).replace(Gb, "");
 }}, CyrillicDefault:{normalize:!1, dedupe:!0, prepare:function(a) {
-  return ("" + a).replace(Gb, " ");
+  return ("" + a).replace(Hb, " ");
 }}};
-var Ib = {memory:{resolution:1}, performance:{resolution:6, fastupdate:!0, context:{depth:1, resolution:3}}, match:{tokenize:"forward"}, score:{resolution:9, context:{depth:2, resolution:9}}};
-O.prototype.add = function(a, b, c, d) {
+var Jb = {memory:{resolution:1}, performance:{resolution:6, fastupdate:!0, context:{depth:1, resolution:3}}, match:{tokenize:"forward"}, score:{resolution:9, context:{depth:2, resolution:9}}};
+R.prototype.add = function(a, b, c, d) {
   if (b && (a || 0 === a)) {
     if (!d && !c && this.reg.has(a)) {
       return this.update(a, b);
     }
     b = this.encoder.encode(b);
     if (d = b.length) {
-      for (var e = J(), f = J(), g = this.depth, h = this.resolution, k = 0; k < d; k++) {
+      for (var e = J(), g = J(), 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 && (g || !f[l])) {
-          var n = this.score ? this.score(b, l, k, null, 0) : Jb(h, d, k), p = "";
+        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) {
                 for (n = 0; n < m; n++) {
                   for (var q = m; q > n; q--) {
                     p = l.substring(n, q);
-                    var t = this.score ? this.score(b, l, k, p, n) : Jb(h, d, k, m, n);
-                    Kb(this, f, p, t, a, c);
+                    var t = this.score ? this.score(b, l, k, p, n) : Kb(h, d, k, m, n);
+                    Lb(this, g, p, t, a, c);
                   }
                 }
                 break;
@@ -2693,24 +2708,24 @@ O.prototype.add = function(a, b, c, d) {
             case "reverse":
               if (1 < m) {
                 for (q = m - 1; 0 < q; q--) {
-                  p = l[q] + p, t = this.score ? this.score(b, l, k, p, q) : Jb(h, d, k, m, q), Kb(this, f, p, t, a, c);
+                  p = l[q] + p, t = this.score ? this.score(b, l, k, p, q) : Kb(h, d, k, m, q), Lb(this, g, p, t, a, c);
                 }
                 p = "";
               }
             case "forward":
               if (1 < m) {
                 for (q = 0; q < m; q++) {
-                  p += l[q], Kb(this, f, p, n, a, c);
+                  p += l[q], Lb(this, g, p, n, a, c);
                 }
                 break;
               }
             default:
-              if (Kb(this, f, l, n, a, c), g && 1 < d && k < d - 1) {
-                for (m = J(), p = this.da, n = l, q = Math.min(g + 1, d - k), t = m[n] = 1; t < q; t++) {
+              if (Lb(this, g, l, n, a, c), f && 1 < d && k < d - 1) {
+                for (m = J(), p = this.da, n = l, q = Math.min(f + 1, d - k), t = m[n] = 1; t < q; t++) {
                   if ((l = b[this.rtl ? d - 1 - k - t : k + t]) && !m[l]) {
                     m[l] = 1;
-                    var x = this.score ? this.score(b, n, k, l, t) : Jb(p + (d / 2 > p ? 0 : 1), d, k, q - 1, t - 1), r = this.bidirectional && l > n;
-                    Kb(this, e, r ? n : l, x, a, c, r ? l : n);
+                    var x = this.score ? this.score(b, n, k, l, t) : Kb(p + (d / 2 > p ? 0 : 1), d, k, q - 1, t - 1), r = this.bidirectional && l > n;
+                    Lb(this, e, r ? n : l, x, a, c, r ? l : n);
                   }
                 }
               }
@@ -2722,18 +2737,18 @@ O.prototype.add = function(a, b, c, d) {
       b = "";
     }
   }
-  this.db && (b || this.commit_task.push({del:a}), this.ca && Lb(this));
+  this.db && (b || this.commit_task.push({del:a}), this.ca && Mb(this));
   return this;
 };
-function Kb(a, b, c, d, e, f, g) {
-  var h = g ? a.ctx : a.map, k;
-  if (!b[c] || g && !(k = b[c])[g]) {
-    if (g ? (b = k || (b[c] = J()), b[g] = 1, (k = h.get(g)) ? h = k : h.set(g, h = new Map())) : b[c] = 1, (k = h.get(c)) ? h = k : h.set(c, h = k = []), h = h[d] || (h[d] = []), !f || !h.includes(e)) {
+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] = J()), b[f] = 1, (k = h.get(f)) ? h = k : h.set(f, h = new Map())) : b[c] = 1, (k = h.get(c)) ? h = k : h.set(c, h = k = []), h = h[d] || (h[d] = []), !g || !h.includes(e)) {
       if (h.length === Math.pow(2, 31) - 1) {
-        b = new S(h);
+        b = new bb(h);
         if (a.fastupdate) {
-          for (c = w(a.reg.values()), f = c.next(); !f.done; f = c.next()) {
-            f = f.value, f.includes(h) && (f[f.indexOf(h)] = b);
+          for (c = w(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;
@@ -2743,43 +2758,43 @@ function Kb(a, b, c, d, e, f, g) {
     }
   }
 }
-function Jb(a, b, c, d, e) {
+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;
 }
-;O.prototype.search = function(a, b, c) {
+;R.prototype.search = function(a, b, c) {
   c || (!b && M(a) ? (c = a, a = "") : M(b) && (c = b, b = 0));
-  var d = [], e = 0, f;
+  var d = [], e = 0, g;
   if (c) {
     a = c.query || a;
     b = c.limit || b;
     e = c.offset || 0;
-    var g = c.context;
+    var f = c.context;
     var h = c.suggest;
-    var k = (f = !1 !== c.resolve) && c.enrich;
+    var k = (g = !1 !== c.resolve) && c.enrich;
     var l = c.boost;
     var m = c.resolution;
     var n = this.db && c.tag;
   } else {
-    f = this.resolve;
+    g = this.resolve;
   }
   var p = this.encoder.encode(a);
   var q = p.length;
-  b = b || (f ? 100 : 0);
+  b = b || (g ? 100 : 0);
   if (1 === q) {
-    return Mb.call(this, p[0], "", b, e, f, k, n);
+    return Nb.call(this, p[0], "", b, e, g, k, n);
   }
-  g = this.depth && !1 !== g;
-  if (2 === q && g && !h) {
-    return Mb.call(this, p[0], p[1], b, e, f, k, n);
+  f = this.depth && !1 !== f;
+  if (2 === q && f && !h) {
+    return Nb.call(this, p[0], p[1], b, e, g, k, n);
   }
   var t = J(), x = 0;
-  if (1 < q && g) {
+  if (1 < q && f) {
     var r = p[0];
     x = 1;
   }
   m || 0 === m || (m = r ? this.da : this.resolution);
   if (this.db) {
-    if (this.db.search && (a = this.db.search(this, p, b, e, h, f, k, n), !1 !== a)) {
+    if (this.db.search && (a = this.db.search(this, p, b, e, h, g, k, n), !1 !== a)) {
       return a;
     }
     var A = this;
@@ -2800,10 +2815,10 @@ function Jb(a, b, c, d, e) {
               break;
             }
             t[v] = 1;
-            return E(y, Nb(A, v, r, 0, 0, !1, !1), 6);
+            return E(y, Ob(A, v, r, 0, 0, !1, !1), 6);
           case 6:
             z = y.G;
-            if (z = Ob(z, d, h, m)) {
+            if (z = Pb(z, d, h, m)) {
               d = z;
               y.h = 4;
               break;
@@ -2815,7 +2830,7 @@ function Jb(a, b, c, d, e) {
             y.h = 2;
             break;
           case 4:
-            return y.return(Pb(d, m, b, e, h, l, f));
+            return y.return(Qb(d, m, b, e, h, l, g));
         }
       });
     }();
@@ -2823,8 +2838,8 @@ function Jb(a, b, c, d, e) {
   for (c = a = void 0; x < q; x++) {
     if ((c = p[x]) && !t[c]) {
       t[c] = 1;
-      a = Nb(this, c, r, 0, 0, !1, !1);
-      if (a = Ob(a, d, h, m)) {
+      a = Ob(this, c, r, 0, 0, !1, !1);
+      if (a = Pb(a, d, h, m)) {
         d = a;
         break;
       }
@@ -2832,33 +2847,33 @@ function Jb(a, b, c, d, e) {
     }
     h && r && x === q - 1 && !d.length && (r = "", x = -1, t = J());
   }
-  return Pb(d, m, b, e, h, l, f);
+  return Qb(d, m, b, e, h, l, g);
 };
-function Pb(a, b, c, d, e, f, g) {
+function Qb(a, b, c, d, e, g, f) {
   var h = a.length, k = a;
   if (1 < h) {
-    k = ib(a, b, c, d, e, f, g);
+    k = jb(a, b, c, d, e, g, f);
   } else if (1 === h) {
-    return g ? lb.call(null, a[0], c, d) : new X(a[0]);
+    return f ? mb.call(null, a[0], c, d) : new Y(a[0]);
   }
-  return g ? k : new X(k);
+  return f ? k : new Y(k);
 }
-function Mb(a, b, c, d, e, f, g) {
-  a = Nb(this, a, b, c, d, e, f, g);
+function Nb(a, b, c, d, e, g, f) {
+  a = Ob(this, a, b, c, d, e, g, f);
   return this.db ? a.then(function(h) {
-    return e ? h || [] : new X(h);
-  }) : a && a.length ? e ? lb.call(this, a, c, d) : new X(a) : e ? [] : new X();
+    return e ? h || [] : new Y(h);
+  }) : a && a.length ? e ? mb.call(this, a, c, d) : new Y(a) : e ? [] : new Y();
 }
-function Ob(a, b, c, d) {
+function Pb(a, b, c, d) {
   var e = [];
   if (a && a.length) {
     if (a.length <= d) {
       b.push(a);
       return;
     }
-    for (var f = 0, g; f < d; f++) {
-      if (g = a[f]) {
-        e[f] = g;
+    for (var g = 0, f; g < d; g++) {
+      if (f = a[g]) {
+        e[g] = f;
       }
     }
     if (e.length) {
@@ -2870,16 +2885,16 @@ function Ob(a, b, c, d) {
     return e;
   }
 }
-function Nb(a, b, c, d, e, f, g, h) {
+function Ob(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, f, g, h);
+    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;
 }
-;O.prototype.remove = function(a, b) {
+;R.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) {
@@ -2888,27 +2903,27 @@ function Nb(a, b, c, d, e, f, g, h) {
           if (2 > e.length) {
             e.pop();
           } else {
-            var f = e.indexOf(a);
-            f === c.length - 1 ? e.pop() : e.splice(f, 1);
+            var g = e.indexOf(a);
+            g === c.length - 1 ? e.pop() : e.splice(g, 1);
           }
         }
       }
     } else {
-      Qb(this.map, a), this.depth && Qb(this.ctx, a);
+      Rb(this.map, a), this.depth && Rb(this.ctx, a);
     }
     b || this.reg.delete(a);
   }
-  this.db && (this.commit_task.push({del:a}), this.ca && Lb(this));
+  this.db && (this.commit_task.push({del:a}), this.ca && Mb(this));
   this.cache && this.cache.remove(a);
   return this;
 };
-function Qb(a, b) {
+function Rb(a, b) {
   var c = 0;
   if (a.constructor === Array) {
-    for (var d = 0, e = void 0, f; d < a.length; d++) {
+    for (var d = 0, e = void 0, g; d < a.length; d++) {
       if ((e = a[d]) && e.length) {
-        if (f = e.indexOf(b), 0 <= f) {
-          1 < e.length ? (e.splice(f, 1), c++) : delete a[d];
+        if (g = e.indexOf(b), 0 <= g) {
+          1 < e.length ? (e.splice(g, 1), c++) : delete a[d];
           break;
         } else {
           c++;
@@ -2917,23 +2932,23 @@ function Qb(a, b) {
     }
   } else {
     for (d = w(a.entries()), e = d.next(); !e.done; e = d.next()) {
-      f = e.value, e = f[0], (f = Qb(f[1], b)) ? c += f : a.delete(e);
+      g = e.value, e = g[0], (g = Rb(g[1], b)) ? c += g : a.delete(e);
     }
   }
   return c;
 }
-;function O(a, b) {
-  if (!this || this.constructor !== O) {
-    return new O(a);
+;function R(a, b) {
+  if (!this || this.constructor !== R) {
+    return new R(a);
   }
   if (a) {
     var c = K(a) ? a : a.preset;
-    c && (Ib[c] || console.warn("Preset not found: " + c), a = Object.assign({}, Ib[c], a));
+    c && (Jb[c] || console.warn("Preset not found: " + c), a = Object.assign({}, Jb[c], a));
   } else {
     a = {};
   }
   c = a.context;
-  var d = !0 === c ? {depth:1} : c || {}, e = K(a.encoder) ? Hb[a.encoder] : a.encode || a.encoder || zb;
+  var d = !0 === c ? {depth:1} : c || {}, e = K(a.encoder) ? Ib[a.encoder] : a.encode || a.encoder || Ab;
   this.encoder = e.encode ? e : "object" === typeof e ? new Ga(e) : {encode:e};
   this.resolution = a.resolution || 9;
   this.tokenize = c = a.tokenize || "strict";
@@ -2942,12 +2957,12 @@ function Qb(a, b) {
   this.fastupdate = !!a.fastupdate;
   this.score = a.score || null;
   (c = a.keystore || 0) && (this.keystore = c);
-  this.map = c ? new T(c) : new Map();
-  this.ctx = c ? new T(c) : new Map();
-  this.reg = b || (this.fastupdate ? c ? new T(c) : new Map() : c ? new U(c) : new Set());
+  this.map = c ? new U(c) : new Map();
+  this.ctx = c ? new U(c) : new Map();
+  this.reg = b || (this.fastupdate ? c ? new U(c) : new Map() : c ? new V(c) : new Set());
   this.da = d.resolution || 3;
   this.rtl = e.rtl || a.rtl || !1;
-  this.cache = (c = a.cache || null) && new Y(c);
+  this.cache = (c = a.cache || null) && new Z(c);
   this.resolve = !1 !== a.resolve;
   if (c = a.db) {
     this.db = this.mount(c);
@@ -2957,7 +2972,7 @@ function Qb(a, b) {
   this.commit_timer = null;
   this.priority = a.priority || 4;
 }
-u = O.prototype;
+u = R.prototype;
 u.mount = function(a) {
   this.commit_timer && (clearTimeout(this.commit_timer), this.commit_timer = null);
   return a.mount(this);
@@ -2970,7 +2985,7 @@ u.destroy = function() {
   this.commit_timer && (clearTimeout(this.commit_timer), this.commit_timer = null);
   return this.db.destroy();
 };
-function Lb(a) {
+function Mb(a) {
   a.commit_timer || (a.commit_timer = setTimeout(function() {
     a.commit_timer = null;
     a.db.commit(a, void 0, void 0);
@@ -2996,7 +3011,7 @@ u.update = function(a, b) {
     return c.add(a, b);
   }) : this.add(a, b);
 };
-function Rb(a) {
+function Sb(a) {
   var b = 0;
   if (a.constructor === Array) {
     for (var c = 0, d = void 0; c < a.length; c++) {
@@ -3006,7 +3021,7 @@ function Rb(a) {
     for (c = w(a), d = c.next(); !d.done; d = c.next()) {
       var e = d.value;
       d = e[0];
-      (e = Rb(e[1])) ? b += e : a.delete(d);
+      (e = Sb(e[1])) ? b += e : a.delete(d);
     }
   }
   return b;
@@ -3015,35 +3030,35 @@ u.cleanup = function() {
   if (!this.fastupdate) {
     return console.info('Cleanup the index isn\'t required when not using "fastupdate".'), this;
   }
-  Rb(this.map);
-  this.depth && Rb(this.ctx);
+  Sb(this.map);
+  this.depth && Sb(this.ctx);
   return this;
 };
-u.searchCache = yb;
+u.searchCache = zb;
 u.export = function(a, b, c, d) {
   c = void 0 === c ? 0 : c;
   d = void 0 === d ? 0 : d;
   switch(d) {
     case 0:
       var e = "reg";
-      var f = Ya(this.reg);
+      var g = Ya(this.reg);
       break;
     case 1:
       e = "cfg";
-      f = null;
+      g = null;
       break;
     case 2:
       e = "map";
-      f = Ua(this.map, this.reg.size);
+      g = Ua(this.map, this.reg.size);
       break;
     case 3:
       e = "ctx";
-      f = Wa(this.ctx, this.reg.size);
+      g = Wa(this.ctx, this.reg.size);
       break;
     default:
       return;
   }
-  return $a.call(this, a, b, e, f, c, d);
+  return $a.call(this, a, b, e, g, c, d);
 };
 u.import = function(a, b) {
   if (b) {
@@ -3071,26 +3086,26 @@ u.serialize = function(a) {
   b = "index.reg=new Set([" + b + "]);";
   d = "";
   e = w(this.map.entries());
-  for (var f = e.next(); !f.done; f = e.next()) {
-    var g = f.value;
-    f = g[0];
-    g = g[1];
-    for (var h = "", k = 0, l; k < g.length; k++) {
-      l = g[k] || [""];
+  for (var g = e.next(); !g.done; g = e.next()) {
+    var f = g.value;
+    g = f[0];
+    f = f[1];
+    for (var h = "", k = 0, l; k < f.length; k++) {
+      l = f[k] || [""];
       for (var m = "", n = 0; n < l.length; n++) {
         m += (m ? "," : "") + ("string" === c ? '"' + l[n] + '"' : l[n]);
       }
       m = "[" + m + "]";
       h += (h ? "," : "") + m;
     }
-    h = '["' + f + '",[' + h + "]]";
+    h = '["' + g + '",[' + h + "]]";
     d += (d ? "," : "") + h;
   }
   d = "index.map=new Map([" + d + "]);";
   e = "";
-  f = w(this.ctx.entries());
-  for (g = f.next(); !g.done; g = f.next()) {
-    for (h = g.value, g = h[0], h = w(h[1].entries()), k = h.next(); !k.done; k = h.next()) {
+  g = w(this.ctx.entries());
+  for (f = g.next(); !f.done; f = g.next()) {
+    for (h = f.value, f = h[0], h = w(h[1].entries()), k = h.next(); !k.done; k = h.next()) {
       l = k.value;
       k = l[0];
       l = l[1];
@@ -3105,19 +3120,19 @@ u.serialize = function(a) {
         m += (m ? "," : "") + q;
       }
       m = 'new Map([["' + k + '",[' + m + "]]])";
-      m = '["' + g + '",' + m + "]";
+      m = '["' + f + '",' + m + "]";
       e += (e ? "," : "") + m;
     }
   }
   e = "index.ctx=new Map([" + e + "]);";
   return a ? "function inject(index){" + b + d + e + "}" : b + d + e;
 };
-Na(O.prototype);
-var Sb = "undefined" !== typeof window && (window.indexedDB || window.mozIndexedDB || window.webkitIndexedDB || window.msIndexedDB), Tb = ["map", "ctx", "tag", "reg", "cfg"];
-function Ub(a, b) {
+Ja(R.prototype);
+var Tb = "undefined" !== typeof window && (window.indexedDB || window.mozIndexedDB || window.webkitIndexedDB || window.msIndexedDB), Ub = ["map", "ctx", "tag", "reg", "cfg"];
+function Vb(a, b) {
   b = void 0 === b ? {} : b;
   if (!this) {
-    return new Ub(a, b);
+    return new Vb(a, b);
   }
   "object" === typeof a && (b = a, a = a.name);
   a || console.info("Default storage space was used, because a name was not passed.");
@@ -3128,7 +3143,7 @@ function Ub(a, b) {
   this.db = null;
   this.h = {};
 }
-u = Ub.prototype;
+u = Vb.prototype;
 u.mount = function(a) {
   if (!a.encoder) {
     return a.mount(this);
@@ -3140,11 +3155,11 @@ u.open = function() {
   var a = this;
   navigator.storage && navigator.storage.persist();
   return this.db || new Promise(function(b, c) {
-    var d = Sb.open(a.id + (a.field ? ":" + a.field : ""), 1);
+    var d = Tb.open(a.id + (a.field ? ":" + a.field : ""), 1);
     d.onupgradeneeded = function() {
       var e = a.db = this.result;
-      Tb.forEach(function(f) {
-        e.objectStoreNames.contains(f) || e.createObjectStore(f);
+      Ub.forEach(function(g) {
+        e.objectStoreNames.contains(g) || e.createObjectStore(g);
       });
     };
     d.onblocked = function(e) {
@@ -3169,23 +3184,23 @@ u.close = function() {
   this.db = null;
 };
 u.destroy = function() {
-  var a = Sb.deleteDatabase(this.id + (this.field ? ":" + this.field : ""));
-  return Z(a);
+  var a = Tb.deleteDatabase(this.id + (this.field ? ":" + this.field : ""));
+  return Wb(a);
 };
 u.clear = function() {
-  for (var a = this.db.transaction(Tb, "readwrite"), b = 0; b < Tb.length; b++) {
-    a.objectStore(Tb[b]).clear();
+  for (var a = this.db.transaction(Ub, "readwrite"), b = 0; b < Ub.length; b++) {
+    a.objectStore(Ub[b]).clear();
   }
-  return Z(a);
+  return Wb(a);
 };
-u.get = function(a, b, c, d, e, f) {
+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;
-  f = void 0 === f ? !1 : f;
+  g = void 0 === g ? !1 : g;
   a = this.db.transaction(b ? "ctx" : "map", "readonly").objectStore(b ? "ctx" : "map").get(b ? b + ":" + a : a);
-  var g = this;
-  return Z(a).then(function(h) {
+  var f = this;
+  return Wb(a).then(function(h) {
     var k = [];
     if (!h || !h.length) {
       return k;
@@ -3209,7 +3224,7 @@ u.get = function(a, b, c, d, e, f) {
           }
         }
       }
-      return f ? g.enrich(k) : k;
+      return g ? f.enrich(k) : k;
     }
     return h;
   });
@@ -3220,32 +3235,32 @@ u.tag = function(a, b, c, d) {
   d = void 0 === d ? !1 : d;
   a = this.db.transaction("tag", "readonly").objectStore("tag").get(a);
   var e = this;
-  return Z(a).then(function(f) {
-    if (!f || !f.length || c >= f.length) {
+  return Wb(a).then(function(g) {
+    if (!g || !g.length || c >= g.length) {
       return [];
     }
     if (!b && !c) {
-      return f;
+      return g;
     }
-    f = f.slice(c, c + b);
-    return d ? e.enrich(f) : f;
+    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]));
+    c[d] = Wb(b.get(a[d]));
   }
   return Promise.all(c).then(function(e) {
-    for (var f = 0; f < e.length; f++) {
-      e[f] = {id:a[f], doc:e[f] ? JSON.parse(e[f]) : null};
+    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);
+  return Wb(a);
 };
 u.search = null;
 u.info = function() {
@@ -3255,24 +3270,24 @@ u.transaction = function(a, b, c) {
   if (e) {
     return c.call(this, e);
   }
-  var f = this.db.transaction(a, b);
-  this.h[a + ":" + b] = e = f.objectStore(a);
-  return new Promise(function(g, h) {
-    f.onerror = function(k) {
+  var g = this.db.transaction(a, b);
+  this.h[a + ":" + b] = e = g.objectStore(a);
+  return new Promise(function(f, h) {
+    g.onerror = function(k) {
       d.h[a + ":" + b] = null;
-      f.abort();
-      f = e = null;
+      g.abort();
+      g = e = null;
       h(k);
     };
-    f.oncomplete = function(k) {
-      f = e = d.h[a + ":" + b] = null;
-      g(k || !0);
+    g.oncomplete = function(k) {
+      g = e = d.h[a + ":" + b] = null;
+      f(k || !0);
     };
     return c.call(d, e);
   });
 };
 u.commit = function(a, b, c) {
-  var d = this, e, f, g;
+  var d = this, e, g, f;
   return ta(function(h) {
     switch(h.h) {
       case 1:
@@ -3281,16 +3296,16 @@ u.commit = function(a, b, c) {
         }
         e = a.commit_task;
         a.commit_task = [];
-        f = 0;
-        g = void 0;
+        g = 0;
+        f = void 0;
       case 4:
-        if (!(f < e.length)) {
+        if (!(g < e.length)) {
           h.h = 6;
           break;
         }
-        g = e[f];
-        if (!g.clear) {
-          e[f] = g.ma;
+        f = e[g];
+        if (!f.clear) {
+          e[g] = f.ma;
           h.h = 5;
           break;
         }
@@ -3300,7 +3315,7 @@ u.commit = function(a, b, c) {
         h.h = 6;
         break;
       case 5:
-        f++;
+        g++;
         h.h = 4;
         break;
       case 6:
@@ -3420,11 +3435,11 @@ u.commit = function(a, b, c) {
     }
   });
 };
-function Xb(a, b, c) {
-  for (var d = a.value, e, f, g = 0, h = 0, k; h < d.length; h++) {
+function Zb(a, b, c) {
+  for (var d = a.value, e, g, f = 0, h = 0, k; h < d.length; h++) {
     if (k = c ? d : d[h]) {
       for (var l = 0, m, n; l < b.length; l++) {
-        if (n = b[l], m = k.indexOf(f ? parseInt(n, 10) : n), 0 > m && !f && "string" === typeof n && !isNaN(n) && (m = k.indexOf(parseInt(n, 10))) && (f = 1), 0 <= m) {
+        if (n = b[l], m = k.indexOf(g ? parseInt(n, 10) : n), 0 > m && !g && "string" === typeof n && !isNaN(n) && (m = k.indexOf(parseInt(n, 10))) && (g = 1), 0 <= m) {
           if (e = 1, 1 < k.length) {
             k.splice(m, 1);
           } else {
@@ -3433,13 +3448,13 @@ function Xb(a, b, c) {
           }
         }
       }
-      g += k.length;
+      f += k.length;
     }
     if (c) {
       break;
     }
   }
-  g ? e && a.update(d) : a.delete();
+  f ? e && a.update(d) : a.delete();
   a.continue();
 }
 u.remove = function(a) {
@@ -3447,17 +3462,17 @@ u.remove = function(a) {
   return Promise.all([this.transaction("map", "readwrite", function(b) {
     b.openCursor().onsuccess = function() {
       var c = this.result;
-      c && Xb(c, a);
+      c && Zb(c, a);
     };
   }), this.transaction("ctx", "readwrite", function(b) {
     b.openCursor().onsuccess = function() {
       var c = this.result;
-      c && Xb(c, a);
+      c && Zb(c, a);
     };
   }), this.transaction("tag", "readwrite", function(b) {
     b.openCursor().onsuccess = function() {
       var c = this.result;
-      c && Xb(c, a, !0);
+      c && Zb(c, a, !0);
     };
   }), this.transaction("reg", "readwrite", function(b) {
     for (var c = 0; c < a.length; c++) {
@@ -3465,7 +3480,7 @@ u.remove = function(a) {
     }
   })]);
 };
-function Z(a) {
+function Wb(a) {
   return new Promise(function(b, c) {
     a.onsuccess = function() {
       b(this.result);
@@ -3477,8 +3492,8 @@ function Z(a) {
     a = null;
   });
 }
-;var Yb = {Index:O, Charset:Hb, Encoder:Ga, Document:V, Worker:R, Resolver:X, IndexedDB:Ub, Language:{}}, Zb = self, $b;
-($b = Zb.define) && $b.amd ? $b([], function() {
-  return Yb;
-}) : "object" === typeof Zb.exports ? Zb.exports = Yb : Zb.FlexSearch = Yb;
+;var $b = {Index:R, Charset:Ib, Encoder:Ga, Document:W, Worker:S, Resolver:Y, IndexedDB:Vb, Language:{}}, ac = "undefined" !== typeof self ? self : "undefined" !== typeof global ? global : "undefined" !== typeof window ? window : {}, bc;
+(bc = ac.define) && bc.amd ? bc([], function() {
+  return $b;
+}) : "object" === typeof ac.exports ? ac.exports = $b : ac.FlexSearch = $b;
 }(this||self));
diff --git a/dist/flexsearch.es5.min.js b/dist/flexsearch.es5.min.js
index beef916..ce05e76 100644
--- a/dist/flexsearch.es5.min.js
+++ b/dist/flexsearch.es5.min.js
@@ -1,5 +1,5 @@
 /**!
- * FlexSearch.js v0.8.107 (ES5)
+ * FlexSearch.js v0.8.108 (ES5)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
@@ -51,85 +51,85 @@ u.addReplacer=function(a,b){if("string"===typeof a)return this.addMatcher(a,b);t
 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(N,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,"$1 "));for(var c=!(this.dedupe||this.mapper||this.filter||this.matcher||this.stemmer||this.replacer),
 d=[],e=this.split||""===this.split?a.split(this.split):a,g=0,f=void 0,h=void 0;g<e.length;g++)if((f=h=e[g])&&!(f.length<this.minlength))if(c)d.push(f);else if(!this.filter||!this.filter.has(f)){if(this.cache&&f.length<=this.H)if(this.D){var k=this.C.get(f);if(k||""===k){k&&d.push(k);continue}}else this.D=setTimeout(N,50,this);this.stemmer&&2<f.length&&(this.N||(this.N=new RegExp("(?!^)("+this.A+")$")),f=f.replace(this.N,function(q){return b.stemmer.get(q)}),f.length<this.minlength||this.filter&&this.filter.has(f))&&
 (f="");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,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 N(a){a.D=null;a.B.clear();a.C.clear()};function Ja(a){var b,c,d,e,g,f,h;return ta(function(k){a=a.data;b=self._index;c=a.args;d=a.task;switch(d){case "init":e=a.options||{};(g=a.factory)?(Function("return "+g)()(self),self._index=new self.FlexSearch.Index(e),delete self.FlexSearch):self._index=new O(e);postMessage({id:a.id});break;default:f=a.id,h=b[d].apply(b,c),postMessage("search"===d?{id:f,msg:h}:{id:f})}k.h=0})};var Ka=0;
-function R(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[++Ka]=function(){k(e)};e.worker.postMessage({id:Ka,task:"init",factory:c,options:a})});this.worker.postMessage({task:"init",factory:c,options:a});return this}}a=void 0===a?{}:a;if(!this||this.constructor!==R)return new R(a);var c="undefined"!==typeof self?self._factory:
-"undefined"!==typeof window?window._factory:null;c&&(c=c.toString());var d="undefined"===typeof window,e=this,g=La(c,d,a.worker);return g.then?g.then(function(f){return b.call(e,f)}):b.call(this,g)}Ma("add");Ma("append");Ma("search");Ma("update");Ma("remove");
-function Ma(a){R.prototype[a]=R.prototype[a+"Async"]=function(){var b=this,c=arguments,d,e,g,f,h;return ta(function(k){d=b;e=[].slice.call(c);g=e[e.length-1];"function"===typeof g&&(f=g,e.splice(e.length-1,1));h=new Promise(function(l){d.h[++Ka]=l;d.worker.postMessage({task:a,id:Ka,args:e})});return f?(h.then(f),k.return(b)):k.return(h)})}}
-function La(a,b,c){return b?"undefined"!==typeof module?new (require("worker_threads")["Worker"])(__dirname + "/node/node.js"):import("worker_threads").then(function(worker){ return new worker["Worker"]((1,eval)("import.meta.dirname") + "/node/node.mjs"); }):a?new window.Worker(URL.createObjectURL(new Blob(["onmessage="+Ja.toString()],{type:"text/javascript"}))):new window.Worker(K(c)?c:(0,eval)("import.meta.url").replace("/worker.js","/worker/worker.js").replace("flexsearch.bundle.module.min.js",
-"module/worker/worker.js"),{type:"module"})};function Na(a){Oa.call(a,"add");Oa.call(a,"append");Oa.call(a,"search");Oa.call(a,"update");Oa.call(a,"remove")}var Pa,Qa,Ra={},Sa={};function Ta(a){Pa=0;Ra[a]=Sa[a]}
-function Oa(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]}Pa||(Pa=setTimeout(Ta,0,a),Qa=Date.now());Sa[a]||(Sa[a]=Ra[a]=1E3);if(!--Ra[a]){Ra[a]=Sa[a]=Sa[a]*this.priority*this.priority*3/(Date.now()-Qa)|0||1;Pa=clearTimeout(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}};function Ua(a,b){b=void 0===b?0:b;var c=[],d=[];b&&(b=25E4/b*5E3|0);a=w(a.entries());for(var e=a.next();!e.done;e=a.next())d.push(e.value),d.length===b&&(c.push(d),d=[]);d.length&&c.push(d);return c}function Va(a,b){b||(b=new Map);for(var c=0,d;c<a.length;c++)d=a[c],b.set(d[0],d[1]);return b}
+(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 N(a){a.D=null;a.B.clear();a.C.clear()};var O,Ha;function Ia(a){var b,c,d,e,g;return ta(function(f){if(1==f.h)switch(a=a.data,b=a.task,c=a.id,d=a.args,b){case "init":Ha=a.options||{};(e=a.factory)?(Function("return "+e)()(self),O=new self.FlexSearch.Index(Ha),delete self.FlexSearch):O=new R(Ha);postMessage({id:c});break;default:f.h=2;return}else{if(4!=f.h){"export"===b&&(d=[Ha.export]);if("import"!==b){g=O[b].apply(O,d);f.h=4;return}return E(f,Ha.import.call(O,O),4)}postMessage("search"===b?{id:c,msg:g}:{id:c})}f.h=0})};function Ja(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={},Qa={};function Ra(a){Na=0;Pa[a]=Qa[a]}
+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||(Na=setTimeout(Ra,0,a),Oa=Date.now());Qa[a]||(Qa[a]=Pa[a]=1E3);if(!--Pa[a]){Pa[a]=Qa[a]=Qa[a]*this.priority*this.priority*3/(Date.now()-Oa)|0||1;Na=clearTimeout(Na);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 Sa=0;
+function S(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[++Sa]=function(){k(e)};e.worker.postMessage({id:Sa,task:"init",factory:c,options:a})});this.worker.postMessage({task:"init",factory:c,options:a});return this}}a=void 0===a?{}:a;if(!this||this.constructor!==S)return new S(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)}T("add");T("append");T("search");T("update");T("remove");T("clear");T("export");T("import");Ja(S.prototype);
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-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","readonly").objectStore("tag").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})};
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+b+d+e+"}":b+d+e};Ja(R.prototype);var Tb="undefined"!==typeof window&&(window.indexedDB||window.mozIndexedDB||window.webkitIndexedDB||window.msIndexedDB),Ub=["map","ctx","tag","reg","cfg"];
+function Vb(a,b){b=void 0===b?{}:b;if(!this)return new Vb(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=Vb.prototype;u.mount=function(a){if(!a.encoder)return a.mount(this);a.db=this;return this.open()};
+u.open=function(){var a=this;navigator.storage&&navigator.storage.persist();return this.db||new Promise(function(b,c){var d=Tb.open(a.id+(a.field?":"+a.field:""),1);d.onupgradeneeded=function(){var e=a.db=this.result;Ub.forEach(function(g){e.objectStoreNames.contains(g)||e.createObjectStore(g)})};d.onblocked=function(e){console.error("blocked",e);c()};d.onerror=function(e){console.error(this.error,e);c()};d.onsuccess=function(){a.db=this.result;a.db.onversionchange=function(){a.close()};b(a)}})};
+u.close=function(){this.db.close();this.db=null};u.destroy=function(){var a=Tb.deleteDatabase(this.id+(this.field?":"+this.field:""));return Yb(a)};u.clear=function(){for(var a=this.db.transaction(Ub,"readwrite"),b=0;b<Ub.length;b++)a.objectStore(Ub[b]).clear();return Yb(a)};
+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","readonly").objectStore(b?"ctx":"map").get(b?b+":"+a:a);var f=this;return Yb(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","readonly").objectStore("tag").get(a);var e=this;return Yb(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]=Yb(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 Yb(a)};u.search=null;u.info=function(){};
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-function Xb(a,b,c){for(var d=a.value,e,g,f=0,h=0,k;h<d.length;h++){if(k=c?d:d[h]){for(var l=0,m,n;l<b.length;l++)if(n=b[l],m=k.indexOf(g?parseInt(n,10):n),0>m&&!g&&"string"===typeof n&&!isNaN(n)&&(m=k.indexOf(parseInt(n,10)))&&(g=1),0<=m)if(e=1,1<k.length)k.splice(m,1);else{d[h]=[];break}f+=k.length}if(c)break}f?e&&a.update(d):a.delete();a.continue()}
-u.remove=function(a){"object"!==typeof a&&(a=[a]);return Promise.all([this.transaction("map","readwrite",function(b){b.openCursor().onsuccess=function(){var c=this.result;c&&Xb(c,a)}}),this.transaction("ctx","readwrite",function(b){b.openCursor().onsuccess=function(){var c=this.result;c&&Xb(c,a)}}),this.transaction("tag","readwrite",function(b){b.openCursor().onsuccess=function(){var c=this.result;c&&Xb(c,a,!0)}}),this.transaction("reg","readwrite",function(b){for(var c=0;c<a.length;c++)b.delete(a[c])})])};
-function Z(a){return new Promise(function(b,c){a.onsuccess=function(){b(this.result)};a.oncomplete=function(){b(this.result)};a.onerror=c;a=null})};var Yb={Index:O,Charset:Hb,Encoder:Ga,Document:V,Worker:R,Resolver:X,IndexedDB:Wb,Language:{}},Zb=self,$b;($b=Zb.define)&&$b.amd?$b([],function(){return Yb}):"object"===typeof Zb.exports?Zb.exports=Yb:Zb.FlexSearch=Yb;}(this||self));
+function Zb(a,b,c){for(var d=a.value,e,g,f=0,h=0,k;h<d.length;h++){if(k=c?d:d[h]){for(var l=0,m,n;l<b.length;l++)if(n=b[l],m=k.indexOf(g?parseInt(n,10):n),0>m&&!g&&"string"===typeof n&&!isNaN(n)&&(m=k.indexOf(parseInt(n,10)))&&(g=1),0<=m)if(e=1,1<k.length)k.splice(m,1);else{d[h]=[];break}f+=k.length}if(c)break}f?e&&a.update(d):a.delete();a.continue()}
+u.remove=function(a){"object"!==typeof a&&(a=[a]);return Promise.all([this.transaction("map","readwrite",function(b){b.openCursor().onsuccess=function(){var c=this.result;c&&Zb(c,a)}}),this.transaction("ctx","readwrite",function(b){b.openCursor().onsuccess=function(){var c=this.result;c&&Zb(c,a)}}),this.transaction("tag","readwrite",function(b){b.openCursor().onsuccess=function(){var c=this.result;c&&Zb(c,a,!0)}}),this.transaction("reg","readwrite",function(b){for(var c=0;c<a.length;c++)b.delete(a[c])})])};
+function Yb(a){return new Promise(function(b,c){a.onsuccess=function(){b(this.result)};a.oncomplete=function(){b(this.result)};a.onerror=c;a=null})};var $b={Index:R,Charset:Ib,Encoder:Ga,Document:W,Worker:S,Resolver:Y,IndexedDB:Vb,Language:{}},ac="undefined"!==typeof self?self:"undefined"!==typeof global?global:"undefined"!==typeof window?window:{},bc;(bc=ac.define)&&bc.amd?bc([],function(){return $b}):"object"===typeof ac.exports?ac.exports=$b:ac.FlexSearch=$b;}(this||self));
diff --git a/dist/flexsearch.light.debug.js b/dist/flexsearch.light.debug.js
index 0def2dd..f90fba3 100644
--- a/dist/flexsearch.light.debug.js
+++ b/dist/flexsearch.light.debug.js
@@ -1,5 +1,5 @@
 /**!
- * FlexSearch.js v0.8.107 (Light/Debug)
+ * FlexSearch.js v0.8.108 (Light/Debug)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
@@ -47,23 +47,23 @@ function u(a, c, b) {
 function w() {
   return Object.create(null);
 }
-function x(a) {
+function aa(a) {
   let c = 0;
   for (let b = 0, d; b < a.length; b++) {
     (d = a[b]) && c < d.length && (c = d.length);
   }
   return c;
 }
-;const aa = /[^\p{L}\p{N}]+/u, ba = /(\d{3})/g, ca = /(\D)(\d{3})/g, da = /(\d{3})(\D)/g, y = "".normalize && /[\u0300-\u036f]/g;
-function z(a) {
-  if (!this || this.constructor !== z) {
-    return new z(...arguments);
+;const ba = /[^\p{L}\p{N}]+/u, ca = /(\d{3})/g, da = /(\D)(\d{3})/g, ea = /(\d{3})(\D)/g, x = "".normalize && /[\u0300-\u036f]/g;
+function y(a) {
+  if (!this || this.constructor !== y) {
+    return new y(...arguments);
   }
   for (let c = 0; c < arguments.length; c++) {
     this.assign(arguments[c]);
   }
 }
-t = z.prototype;
+t = y.prototype;
 t.assign = function(a) {
   this.normalize = u(a.normalize, !0, this.normalize);
   let c = a.include, b = c || a.exclude || a.split, d;
@@ -91,7 +91,7 @@ t.assign = function(a) {
     this.numeric = u(a.numeric, d);
   } else {
     try {
-      this.split = u(this.split, aa);
+      this.split = u(this.split, ba);
     } catch (e) {
       console.warn("This platform does not support unicode regex. It falls back to using simple whitespace splitter instead: /s+/."), this.split = /\s+/;
     }
@@ -132,13 +132,13 @@ t.addStemmer = function(a, c) {
   this.stemmer.set(a, c);
   this.h += (this.h ? "|" : "") + a;
   this.A = null;
-  this.cache && B(this);
+  this.cache && z(this);
   return this;
 };
 t.addFilter = function(a) {
   this.filter || (this.filter = new Set());
   this.filter.add(a);
-  this.cache && B(this);
+  this.cache && z(this);
   return this;
 };
 t.addMapper = function(a, c) {
@@ -150,7 +150,7 @@ t.addMapper = function(a, c) {
   }
   this.mapper || (this.mapper = new Map());
   this.mapper.set(a, c);
-  this.cache && B(this);
+  this.cache && z(this);
   return this;
 };
 t.addMatcher = function(a, c) {
@@ -164,7 +164,7 @@ t.addMatcher = function(a, c) {
   this.matcher.set(a, c);
   this.g += (this.g ? "|" : "") + a;
   this.v = null;
-  this.cache && B(this);
+  this.cache && z(this);
   return this;
 };
 t.addReplacer = function(a, c) {
@@ -173,7 +173,7 @@ t.addReplacer = function(a, c) {
   }
   this.replacer || (this.replacer = []);
   this.replacer.push(a, c);
-  this.cache && B(this);
+  this.cache && z(this);
   return this;
 };
 t.encode = function(a) {
@@ -183,12 +183,12 @@ t.encode = function(a) {
         return this.i.get(a);
       }
     } else {
-      this.l = setTimeout(B, 50, this);
+      this.l = setTimeout(z, 50, this);
     }
   }
-  this.normalize && ("function" === typeof this.normalize ? a = this.normalize(a) : a = y ? a.normalize("NFKD").replace(y, "").toLowerCase() : a.toLowerCase());
+  this.normalize && ("function" === typeof this.normalize ? a = this.normalize(a) : a = x ? a.normalize("NFKD").replace(x, "").toLowerCase() : a.toLowerCase());
   this.prepare && (a = this.prepare(a));
-  this.numeric && 3 < a.length && (a = a.replace(ca, "$1 $2").replace(da, "$1 $2").replace(ba, "$1 "));
+  this.numeric && 3 < a.length && (a = a.replace(da, "$1 $2").replace(ea, "$1 $2").replace(ca, "$1 "));
   const c = !(this.dedupe || this.mapper || this.filter || this.matcher || this.stemmer || this.replacer);
   let b = [], d = this.split || "" === this.split ? a.split(this.split) : a;
   for (let g = 0, f, h; g < d.length; g++) {
@@ -205,7 +205,7 @@ t.encode = function(a) {
                 continue;
               }
             } else {
-              this.l = setTimeout(B, 50, this);
+              this.l = setTimeout(z, 50, this);
             }
           }
           this.stemmer && 2 < f.length && (this.A || (this.A = new RegExp("(?!^)(" + this.h + ")$")), f = f.replace(this.A, k => this.stemmer.get(k)), f.length < this.minlength || this.filter && this.filter.has(f)) && (f = "");
@@ -232,12 +232,125 @@ t.encode = function(a) {
   this.cache && a.length <= this.o && (this.i.set(a, b), this.i.size > this.C && (this.i.clear(), this.o = this.o / 1.1 | 0));
   return b;
 };
-function B(a) {
+function z(a) {
   a.l = null;
   a.i.clear();
   a.j.clear();
 }
-;function C(a, c, b, d, e) {
+;let A, C;
+async function fa(a) {
+  a = a.data;
+  const c = a.task, b = a.id;
+  let d = a.args;
+  switch(c) {
+    case "init":
+      C = a.options || {};
+      (a = a.factory) ? (Function("return " + a)()(self), A = new self.FlexSearch.Index(C), delete self.FlexSearch) : A = new D(C);
+      postMessage({id:b});
+      break;
+    default:
+      let e;
+      "export" === c && (d = [C.export]);
+      "import" === c ? await C.import.call(A, A) : e = A[c].apply(A, d);
+      postMessage("search" === c ? {id:b, msg:e} : {id:b});
+  }
+}
+;let E, F;
+const G = {}, H = {};
+function ha(a) {
+  E = 0;
+  G[a] = H[a];
+}
+function I(a) {
+  this[a + "Async"] = function() {
+    const c = arguments;
+    var b = c[c.length - 1];
+    let d;
+    "function" === typeof b && (d = b, delete c[c.length - 1]);
+    E || (E = setTimeout(ha, 0, a), F = Date.now());
+    H[a] || (H[a] = G[a] = 1000);
+    if (!--G[a]) {
+      G[a] = H[a] = H[a] * this.priority * this.priority * 3 / (Date.now() - F) | 0 || 1;
+      E = clearTimeout(E);
+      const g = this;
+      return new Promise(f => {
+        setTimeout(function() {
+          f(g[a + "Async"].apply(g, c));
+        }, 0);
+      });
+    }
+    const e = this[a].apply(this, c);
+    b = e.then ? e : new Promise(g => g(e));
+    d && b.then(d);
+    return b;
+  };
+}
+;let J = 0;
+function K(a = {}) {
+  function c(f) {
+    function h(k) {
+      k = k.data || k;
+      const l = k.id, n = l && e.g[l];
+      n && (n(k.msg), delete e.g[l]);
+    }
+    this.worker = f;
+    this.g = w();
+    if (this.worker) {
+      d ? this.worker.on("message", h) : this.worker.onmessage = h;
+      if (a.config) {
+        return new Promise(function(k) {
+          e.g[++J] = function() {
+            k(e);
+          };
+          e.worker.postMessage({id:J, task:"init", factory:b, options:a});
+        });
+      }
+      this.worker.postMessage({task:"init", factory:b, options:a});
+      return this;
+    }
+  }
+  if (!this || this.constructor !== K) {
+    return new K(a);
+  }
+  let b = "undefined" !== typeof self ? self._factory : "undefined" !== typeof window ? window._factory : null;
+  b && (b = b.toString());
+  const d = "undefined" === typeof window, e = this, g = ia(b, d, a.worker);
+  return g.then ? g.then(function(f) {
+    return c.call(e, f);
+  }) : c.call(this, g);
+}
+L("add");
+L("append");
+L("search");
+L("update");
+L("remove");
+L("clear");
+L("export");
+L("import");
+var M = K.prototype;
+I.call(M, "add");
+I.call(M, "append");
+I.call(M, "search");
+I.call(M, "update");
+I.call(M, "remove");
+function L(a) {
+  K.prototype[a] = async function() {
+    const c = this, b = [].slice.call(arguments);
+    var d = b[b.length - 1];
+    let e;
+    "function" === typeof d && (e = d, b.splice(b.length - 1, 1));
+    d = new Promise(function(g) {
+      c.g[++J] = g;
+      c.worker.postMessage({task:a, id:J, args:b});
+    });
+    return e ? (d.then(e), this) : d;
+  };
+}
+function ia(a, c, b) {
+  return c ? "undefined" !== typeof module ? new (require("worker_threads")["Worker"])(__dirname + "/node/node.js") : import("worker_threads").then(function(worker){ return new worker["Worker"]((1,eval)("import.meta.dirname") + "/node/node.mjs"); }) : a ? new window.Worker(URL.createObjectURL(new Blob(["onmessage=" + fa.toString()], {type:"text/javascript"}))) : new window.Worker("string" === typeof b ? b : (0,eval)("import.meta.url").replace("/worker.js", "/worker/worker.js").replace("flexsearch.bundle.module.min.js", 
+  "module/worker/worker.js"), {type:"module"});
+}
+;function ja(a, c, b, d, e) {
   const g = a.length;
   let f = [], h, k;
   h = w();
@@ -252,7 +365,7 @@ function B(a) {
   }
   if (a = f.length) {
     if (e) {
-      f = 1 < f.length ? D(f, b, d) : (f = f[0]).length > b || d ? f.slice(d, b + d) : f;
+      f = 1 < f.length ? la(f, b, d) : (f = f[0]).length > b || d ? f.slice(d, b + d) : f;
     } else {
       if (a < g) {
         return [];
@@ -267,7 +380,7 @@ function B(a) {
   }
   return f;
 }
-function D(a, c, b) {
+function la(a, c, b) {
   const d = [], e = w();
   let g;
   var f = a.length;
@@ -289,12 +402,12 @@ function D(a, c, b) {
   }
   return d;
 }
-;function E(a, c, b, d) {
+;function N(a, c, b, d) {
   if (!a.length) {
     return a;
   }
   if (1 === a.length) {
-    return a = a[0], a = b || a.length > c ? c ? a.slice(b, b + c) : a.slice(b) : a, d ? F.call(this, a) : a;
+    return a = a[0], a = b || a.length > c ? c ? a.slice(b, b + c) : a.slice(b) : a, d ? O.call(this, a) : a;
   }
   let e = [];
   for (let g = 0, f, h; g < a.length; g++) {
@@ -308,7 +421,7 @@ function D(a, c, b) {
       }
       h > c && (f = f.slice(0, c), h = c);
       if (!e.length && h >= c) {
-        return d ? F.call(this, f) : f;
+        return d ? O.call(this, f) : f;
       }
       e.push(f);
       c -= h;
@@ -318,9 +431,9 @@ function D(a, c, b) {
     }
   }
   e = 1 < e.length ? [].concat.apply([], e) : e[0];
-  return d ? F.call(this, e) : e;
+  return d ? O.call(this, e) : e;
 }
-;function G(a, c, b) {
+;function P(a, c, b) {
   var d = b[0];
   if (d.then) {
     return Promise.all(b).then(function(n) {
@@ -335,7 +448,7 @@ function D(a, c, b) {
   for (let n = 0, m; n < b.length; n++) {
     if (m = b[n]) {
       let r;
-      if (m.constructor === I) {
+      if (m.constructor === Q) {
         r = m.result;
       } else if (m.constructor === Array) {
         r = m;
@@ -366,11 +479,11 @@ function D(a, c, b) {
   }
   return {m:d, u:e, limit:g, offset:f, enrich:h, resolve:k, suggest:l};
 }
-;I.prototype.or = function() {
-  const {m:a, u:c, limit:b, offset:d, enrich:e, resolve:g} = G(this, "or", arguments);
-  return J.call(this, a, c, b, d, e, g);
+;Q.prototype.or = function() {
+  const {m:a, u:c, limit:b, offset:d, enrich:e, resolve:g} = P(this, "or", arguments);
+  return ma.call(this, a, c, b, d, e, g);
 };
-function J(a, c, b, d, e, g) {
+function ma(a, c, b, d, e, g) {
   if (c.length) {
     const f = this;
     return Promise.all(c).then(function(h) {
@@ -378,25 +491,25 @@ function J(a, c, b, d, e, g) {
       for (let k = 0, l; k < h.length; k++) {
         (l = h[k]).length && (a[k] = l);
       }
-      return J.call(f, a, [], b, d, e, g);
+      return ma.call(f, a, [], b, d, e, g);
     });
   }
-  a.length && (this.result.length && a.push(this.result), 2 > a.length ? this.result = a[0] : (this.result = D(a, b, d), d = 0));
+  a.length && (this.result.length && a.push(this.result), 2 > a.length ? this.result = a[0] : (this.result = la(a, b, d), d = 0));
   return g ? this.resolve(b, d, e) : this;
 }
-;I.prototype.and = function() {
+;Q.prototype.and = function() {
   let a = this.result.length, c, b, d, e;
   if (!a) {
     const g = arguments[0];
     g && (a = !!g.suggest, e = g.resolve, c = g.limit, b = g.offset, d = g.enrich && e);
   }
   if (a) {
-    const {m:g, u:f, limit:h, offset:k, enrich:l, resolve:n, suggest:m} = G(this, "and", arguments);
-    return K.call(this, g, f, h, k, l, n, m);
+    const {m:g, u:f, limit:h, offset:k, enrich:l, resolve:n, suggest:m} = P(this, "and", arguments);
+    return na.call(this, g, f, h, k, l, n, m);
   }
   return e ? this.resolve(c, b, d) : this;
 };
-function K(a, c, b, d, e, g, f) {
+function na(a, c, b, d, e, g, f) {
   if (c.length) {
     const h = this;
     return Promise.all(c).then(function(k) {
@@ -404,15 +517,15 @@ function K(a, c, b, d, e, g, f) {
       for (let l = 0, n; l < k.length; l++) {
         (n = k[l]).length && (a[l] = n);
       }
-      return K.call(h, a, [], b, d, e, g, f);
+      return na.call(h, a, [], b, d, e, g, f);
     });
   }
   if (a.length) {
     if (this.result.length && a.unshift(this.result), 2 > a.length) {
       this.result = a[0];
     } else {
-      if (c = x(a)) {
-        return this.result = C(a, c, b, d, f), g ? e ? F.call(this.index, this.result) : this.result : this;
+      if (c = aa(a)) {
+        return this.result = ja(a, c, b, d, f), g ? e ? O.call(this.index, this.result) : this.result : this;
       }
       this.result = [];
     }
@@ -421,11 +534,11 @@ function K(a, c, b, d, e, g, f) {
   }
   return g ? this.resolve(b, d, e) : this;
 }
-;I.prototype.xor = function() {
-  const {m:a, u:c, limit:b, offset:d, enrich:e, resolve:g, suggest:f} = G(this, "xor", arguments);
-  return L.call(this, a, c, b, d, e, g, f);
+;Q.prototype.xor = function() {
+  const {m:a, u:c, limit:b, offset:d, enrich:e, resolve:g, suggest:f} = P(this, "xor", arguments);
+  return oa.call(this, a, c, b, d, e, g, f);
 };
-function L(a, c, b, d, e, g, f) {
+function oa(a, c, b, d, e, g, f) {
   if (c.length) {
     const h = this;
     return Promise.all(c).then(function(k) {
@@ -433,21 +546,21 @@ function L(a, c, b, d, e, g, f) {
       for (let l = 0, n; l < k.length; l++) {
         (n = k[l]).length && (a[l] = n);
       }
-      return L.call(h, a, [], b, d, e, g, f);
+      return oa.call(h, a, [], b, d, e, g, f);
     });
   }
   if (a.length) {
     if (this.result.length && a.unshift(this.result), 2 > a.length) {
       this.result = a[0];
     } else {
-      return this.result = ea.call(this, a, b, d, g, this.g), g ? e ? F.call(this.index, this.result) : this.result : this;
+      return this.result = pa.call(this, a, b, d, g, this.g), g ? e ? O.call(this.index, this.result) : this.result : this;
     }
   } else {
     f || (this.result = a);
   }
   return g ? this.resolve(b, d, e) : this;
 }
-function ea(a, c, b, d, e) {
+function pa(a, c, b, d, e) {
   const g = [], f = w();
   let h = 0;
   for (let k = 0, l; k < a.length; k++) {
@@ -492,11 +605,11 @@ function ea(a, c, b, d, e) {
   }
   return g;
 }
-;I.prototype.not = function() {
-  const {m:a, u:c, limit:b, offset:d, enrich:e, resolve:g, suggest:f} = G(this, "not", arguments);
-  return M.call(this, a, c, b, d, e, g, f);
+;Q.prototype.not = function() {
+  const {m:a, u:c, limit:b, offset:d, enrich:e, resolve:g, suggest:f} = P(this, "not", arguments);
+  return qa.call(this, a, c, b, d, e, g, f);
 };
-function M(a, c, b, d, e, g, f) {
+function qa(a, c, b, d, e, g, f) {
   if (c.length) {
     const h = this;
     return Promise.all(c).then(function(k) {
@@ -504,17 +617,17 @@ function M(a, c, b, d, e, g, f) {
       for (let l = 0, n; l < k.length; l++) {
         (n = k[l]).length && (a[l] = n);
       }
-      return M.call(h, a, [], b, d, e, g, f);
+      return qa.call(h, a, [], b, d, e, g, f);
     });
   }
   if (a.length && this.result.length) {
-    this.result = fa.call(this, a, b, d, g);
+    this.result = ra.call(this, a, b, d, g);
   } else if (g) {
     return this.resolve(b, d, e);
   }
-  return g ? e ? F.call(this.index, this.result) : this.result : this;
+  return g ? e ? O.call(this.index, this.result) : this.result : this;
 }
-function fa(a, c, b, d) {
+function ra(a, c, b, d) {
   const e = [];
   a = new Set(a.flat().flat());
   for (let g = 0, f, h = 0; g < this.result.length; g++) {
@@ -540,9 +653,9 @@ function fa(a, c, b, d) {
   }
   return e;
 }
-;function I(a) {
-  if (!this || this.constructor !== I) {
-    return new I(a);
+;function Q(a) {
+  if (!this || this.constructor !== Q) {
+    return new Q(a);
   }
   if (a && a.index) {
     return a.resolve = !1, this.index = a.index, this.g = a.boost || 0, this.result = a.index.search(a).result, this;
@@ -551,7 +664,7 @@ function fa(a, c, b, d) {
   this.result = a || [];
   this.g = 0;
 }
-I.prototype.limit = function(a) {
+Q.prototype.limit = function(a) {
   if (this.result.length) {
     const c = [];
     for (let b = 0, d; b < this.result.length; b++) {
@@ -570,7 +683,7 @@ I.prototype.limit = function(a) {
   }
   return this;
 };
-I.prototype.offset = function(a) {
+Q.prototype.offset = function(a) {
   if (this.result.length) {
     const c = [];
     for (let b = 0, d; b < this.result.length; b++) {
@@ -582,17 +695,17 @@ I.prototype.offset = function(a) {
   }
   return this;
 };
-I.prototype.boost = function(a) {
+Q.prototype.boost = function(a) {
   this.g += a;
   return this;
 };
-I.prototype.resolve = function(a, c, b) {
+Q.prototype.resolve = function(a, c, b) {
   const d = this.result, e = this.index;
   this.result = this.index = null;
-  return d.length ? ("object" === typeof a && (b = a.enrich, c = a.offset, a = a.limit), E.call(e, d, a || 100, c, b)) : d;
+  return d.length ? ("object" === typeof a && (b = a.enrich, c = a.offset, a = a.limit), N.call(e, d, a || 100, c, b)) : d;
 };
 w();
-function F(a) {
+function O(a) {
   if (!this || !this.store) {
     return a;
   }
@@ -602,35 +715,35 @@ function F(a) {
   }
   return c;
 }
-;function N(a) {
+;function S(a) {
   this.limit = a && !0 !== a ? a : 1000;
   this.cache = new Map();
   this.g = "";
 }
-N.prototype.set = function(a, c) {
+S.prototype.set = function(a, c) {
   this.cache.set(this.g = a, c);
   this.cache.size > this.limit && this.cache.delete(this.cache.keys().next().value);
 };
-N.prototype.get = function(a) {
+S.prototype.get = function(a) {
   const c = this.cache.get(a);
   c && this.g !== a && (this.cache.delete(a), this.cache.set(this.g = a, c));
   return c;
 };
-N.prototype.remove = function(a) {
+S.prototype.remove = function(a) {
   for (const c of this.cache) {
     const b = c[0];
     c[1].includes(a) && this.cache.delete(b);
   }
 };
-N.prototype.clear = function() {
+S.prototype.clear = function() {
   this.cache.clear();
   this.g = "";
 };
-const ha = {normalize:function(a) {
+const sa = {normalize:function(a) {
   return a.toLowerCase();
 }};
-const O = {memory:{resolution:1}, performance:{resolution:6, fastupdate:!0, context:{depth:1, resolution:3}}, match:{tokenize:"forward"}, score:{resolution:9, context:{depth:2, resolution:9}}};
-P.prototype.add = function(a, c, b, d) {
+const ta = {memory:{resolution:1}, performance:{resolution:6, fastupdate:!0, context:{depth:1, resolution:3}}, match:{tokenize:"forward"}, score:{resolution:9, context:{depth:2, resolution:9}}};
+D.prototype.add = function(a, c, b, d) {
   if (c && (a || 0 === a)) {
     if (!d && !b && this.reg.has(a)) {
       return this.update(a, c);
@@ -642,15 +755,15 @@ P.prototype.add = function(a, c, b, d) {
         let p = c[this.rtl ? d - 1 - q : q];
         var e = p.length;
         if (e && (m || !n[p])) {
-          var g = this.score ? this.score(c, p, q, null, 0) : Q(r, d, q), f = "";
+          var g = this.score ? this.score(c, p, q, null, 0) : T(r, d, q), f = "";
           switch(this.tokenize) {
             case "full":
               if (2 < e) {
                 for (g = 0; g < e; g++) {
                   for (var h = e; h > g; h--) {
                     f = p.substring(g, h);
-                    var k = this.score ? this.score(c, p, q, f, g) : Q(r, d, q, e, g);
-                    R(this, n, f, k, a, b);
+                    var k = this.score ? this.score(c, p, q, f, g) : T(r, d, q, e, g);
+                    U(this, n, f, k, a, b);
                   }
                 }
                 break;
@@ -658,24 +771,24 @@ P.prototype.add = function(a, c, b, d) {
             case "reverse":
               if (1 < e) {
                 for (h = e - 1; 0 < h; h--) {
-                  f = p[h] + f, k = this.score ? this.score(c, p, q, f, h) : Q(r, d, q, e, h), R(this, n, f, k, a, b);
+                  f = p[h] + f, k = this.score ? this.score(c, p, q, f, h) : T(r, d, q, e, h), U(this, n, f, k, a, b);
                 }
                 f = "";
               }
             case "forward":
               if (1 < e) {
                 for (h = 0; h < e; h++) {
-                  f += p[h], R(this, n, f, g, a, b);
+                  f += p[h], U(this, n, f, g, a, b);
                 }
                 break;
               }
             default:
-              if (R(this, n, p, g, a, b), m && 1 < d && q < d - 1) {
+              if (U(this, n, p, g, a, b), m && 1 < d && q < d - 1) {
                 for (e = w(), f = this.B, g = p, h = Math.min(m + 1, d - q), e[g] = 1, k = 1; k < h; k++) {
                   if ((p = c[this.rtl ? d - 1 - q - k : q + k]) && !e[p]) {
                     e[p] = 1;
-                    const v = this.score ? this.score(c, g, q, p, k) : Q(f + (d / 2 > f ? 0 : 1), d, q, h - 1, k - 1), A = this.bidirectional && p > g;
-                    R(this, l, A ? g : p, v, a, b, A ? p : g);
+                    const v = this.score ? this.score(c, g, q, p, k) : T(f + (d / 2 > f ? 0 : 1), d, q, h - 1, k - 1), B = this.bidirectional && p > g;
+                    U(this, l, B ? g : p, v, a, b, B ? p : g);
                   }
                 }
               }
@@ -687,16 +800,16 @@ P.prototype.add = function(a, c, b, d) {
   }
   return this;
 };
-function R(a, c, b, d, e, g, f) {
+function U(a, c, b, d, e, g, f) {
   let h = f ? a.ctx : a.map, k;
   if (!c[b] || f && !(k = c[b])[f]) {
     f ? (c = k || (c[b] = w()), c[f] = 1, (k = h.get(f)) ? h = k : h.set(f, h = new Map())) : c[b] = 1, (k = h.get(b)) ? h = k : h.set(b, h = []), h = h[d] || (h[d] = []), g && h.includes(e) || (h.push(e), a.fastupdate && ((c = a.reg.get(e)) ? c.push(h) : a.reg.set(e, [h])));
   }
 }
-function Q(a, c, b, d, e) {
+function T(a, c, b, d, e) {
   return b && 1 < a ? c + (d || 0) <= a ? b + (e || 0) : (a - 1) / (c + (d || 0)) * (b + (e || 0)) + 1 | 0 : 0;
 }
-;P.prototype.search = function(a, c, b) {
+;D.prototype.search = function(a, c, b) {
   b || (c || "object" !== typeof a ? "object" === typeof c && (b = c, c = 0) : (b = a, a = ""));
   var d = [], e = 0;
   if (b) {
@@ -714,11 +827,11 @@ function Q(a, c, b, d, e) {
   a = b.length;
   c = c || (h ? 100 : 0);
   if (1 === a) {
-    return S.call(this, b[0], "", c, e, h);
+    return ua.call(this, b[0], "", c, e, h);
   }
   g = this.depth && !1 !== g;
   if (2 === a && g && !f) {
-    return S.call(this, b[0], b[1], c, e, h);
+    return ua.call(this, b[0], b[1], c, e, h);
   }
   h = w();
   let l = 0;
@@ -730,29 +843,29 @@ function Q(a, c, b, d, e) {
   for (let p, v; l < a; l++) {
     if ((v = b[l]) && !h[v]) {
       h[v] = 1;
-      p = T(this, v, n);
+      p = va(this, v, n);
       a: {
         g = p;
         var m = d, r = f, q = k;
-        let A = [];
+        let B = [];
         if (g && g.length) {
           if (g.length <= q) {
             m.push(g);
             p = void 0;
             break a;
           }
-          for (let H = 0, Y; H < q; H++) {
-            if (Y = g[H]) {
-              A[H] = Y;
+          for (let R = 0, ka; R < q; R++) {
+            if (ka = g[R]) {
+              B[R] = ka;
             }
           }
-          if (A.length) {
-            m.push(A);
+          if (B.length) {
+            m.push(B);
             p = void 0;
             break a;
           }
         }
-        p = r ? void 0 : A;
+        p = r ? void 0 : B;
       }
       if (p) {
         d = p;
@@ -766,27 +879,27 @@ function Q(a, c, b, d, e) {
     n = d.length;
     a = d;
     if (1 < n) {
-      a = C(d, k, c, e, f);
+      a = ja(d, k, c, e, f);
     } else if (1 === n) {
-      f = E.call(null, d[0], c, e);
+      f = N.call(null, d[0], c, e);
       break a;
     }
     f = a;
   }
   return f;
 };
-function S(a, c, b, d, e) {
-  a = T(this, a, c);
+function ua(a, c, b, d, e) {
+  a = va(this, a, c);
   e = !0;
-  return a && a.length ? e ? E.call(this, a, b, d) : new I(a) : e ? [] : new I();
+  return a && a.length ? e ? N.call(this, a, b, d) : new Q(a) : e ? [] : new Q();
 }
-function T(a, c, b) {
+function va(a, c, b) {
   let d;
   b && (d = a.bidirectional && c > b) && (d = b, b = c, c = d);
   a = b ? (a = a.ctx.get(b)) && a.get(c) : a.map.get(c);
   return a;
 }
-;P.prototype.remove = function(a, c) {
+;D.prototype.remove = function(a, c) {
   const b = this.reg.size && (this.fastupdate ? this.reg.get(a) : this.reg.has(a));
   if (b) {
     if (this.fastupdate) {
@@ -801,14 +914,14 @@ function T(a, c, b) {
         }
       }
     } else {
-      U(this.map, a), this.depth && U(this.ctx, a);
+      V(this.map, a), this.depth && V(this.ctx, a);
     }
     c || this.reg.delete(a);
   }
   this.cache && this.cache.remove(a);
   return this;
 };
-function U(a, c) {
+function V(a, c) {
   let b = 0;
   if (a.constructor === Array) {
     for (let d = 0, e, g; d < a.length; d++) {
@@ -823,25 +936,25 @@ function U(a, c) {
     }
   } else {
     for (let d of a.entries()) {
-      const e = d[0], g = U(d[1], c);
+      const e = d[0], g = V(d[1], c);
       g ? b += g : a.delete(e);
     }
   }
   return b;
 }
-;function P(a, c) {
-  if (!this || this.constructor !== P) {
-    return new P(a);
+;function D(a, c) {
+  if (!this || this.constructor !== D) {
+    return new D(a);
   }
   if (a) {
     var b = "string" === typeof a ? a : a.preset;
-    b && (O[b] || console.warn("Preset not found: " + b), a = Object.assign({}, O[b], a));
+    b && (ta[b] || console.warn("Preset not found: " + b), a = Object.assign({}, ta[b], a));
   } else {
     a = {};
   }
   b = a.context;
-  const d = !0 === b ? {depth:1} : b || {}, e = a.encode || a.encoder || ha;
-  this.encoder = e.encode ? e : "object" === typeof e ? new z(e) : {encode:e};
+  const d = !0 === b ? {depth:1} : b || {}, e = a.encode || a.encoder || sa;
+  this.encoder = e.encode ? e : "object" === typeof e ? new y(e) : {encode:e};
   this.resolution = a.resolution || 9;
   this.tokenize = b = a.tokenize || "strict";
   this.depth = "strict" === b && d.depth || 0;
@@ -854,9 +967,9 @@ function U(a, c) {
   this.reg = c || (this.fastupdate ? new Map() : new Set());
   this.B = d.resolution || 3;
   this.rtl = e.rtl || a.rtl || !1;
-  this.cache = (b = a.cache || null) && new N(b);
+  this.cache = (b = a.cache || null) && new S(b);
 }
-t = P.prototype;
+t = D.prototype;
 t.clear = function() {
   this.map.clear();
   this.ctx.clear();
@@ -874,7 +987,7 @@ t.update = function(a, c) {
   const b = this, d = this.remove(a);
   return d && d.then ? d.then(() => b.add(a, c)) : this.add(a, c);
 };
-function V(a) {
+function W(a) {
   let c = 0;
   if (a.constructor === Array) {
     for (let b = 0, d; b < a.length; b++) {
@@ -882,7 +995,7 @@ function V(a) {
     }
   } else {
     for (const b of a) {
-      const d = b[0], e = V(b[1]);
+      const d = b[0], e = W(b[1]);
       e ? c += e : a.delete(d);
     }
   }
@@ -892,13 +1005,13 @@ t.cleanup = function() {
   if (!this.fastupdate) {
     return console.info('Cleanup the index isn\'t required when not using "fastupdate".'), this;
   }
-  V(this.map);
-  this.depth && V(this.ctx);
+  W(this.map);
+  this.depth && W(this.ctx);
   return this;
 };
 t.searchCache = function(a, c, b) {
   a = ("object" === typeof a ? "" + a.query : a).toLowerCase();
-  this.cache || (this.cache = new N());
+  this.cache || (this.cache = new S());
   let d = this.cache.get(a);
   if (!d) {
     d = this.search(a, c, b);
@@ -913,9 +1026,9 @@ t.searchCache = function(a, c, b) {
   }
   return d;
 };
-const W = {Index:P, Charset:null, Encoder:z, Document:null, Worker:null, Resolver:null, IndexedDB:null, Language:{}}, X = self;
+const X = {Index:D, Charset:null, Encoder:y, Document:null, Worker:null, Resolver:null, IndexedDB:null, Language:{}}, Y = "undefined" !== typeof self ? self : "undefined" !== typeof global ? global : "undefined" !== typeof window ? window : {};
 let Z;
-(Z = X.define) && Z.amd ? Z([], function() {
-  return W;
-}) : "object" === typeof X.exports ? X.exports = W : X.FlexSearch = W;
+(Z = Y.define) && Z.amd ? Z([], function() {
+  return X;
+}) : "object" === typeof Y.exports ? Y.exports = X : Y.FlexSearch = X;
 }(this||self));
diff --git a/dist/flexsearch.light.min.js b/dist/flexsearch.light.min.js
index 6f06d10..03dee1f 100644
--- a/dist/flexsearch.light.min.js
+++ b/dist/flexsearch.light.min.js
@@ -1,34 +1,40 @@
 /**!
- * FlexSearch.js v0.8.107 (Light)
+ * FlexSearch.js v0.8.108 (Light)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
  * https://github.com/nextapps-de/flexsearch
  */
 (function(self){'use strict';var t;function u(a,c,b){const d=typeof b,e=typeof a;if("undefined"!==d){if("undefined"!==e){if(b){if("function"===e&&d===e)return function(h){return a(b(h))};c=a.constructor;if(c===b.constructor){if(c===Array)return b.concat(a);if(c===Map){var g=new Map(b);for(var f of a)g.set(f[0],f[1]);return g}if(c===Set){f=new Set(b);for(g of a.values())f.add(g);return f}}}return a}return b}return"undefined"===e?c:a}function w(){return Object.create(null)}
-function x(a){let c=0;for(let b=0,d;b<a.length;b++)(d=a[b])&&c<d.length&&(c=d.length);return c};const y=/[^\p{L}\p{N}]+/u,aa=/(\d{3})/g,ba=/(\D)(\d{3})/g,ca=/(\d{3})(\D)/g,z="".normalize&&/[\u0300-\u036f]/g;function B(a){if(!this||this.constructor!==B)return new B(...arguments);for(let c=0;c<arguments.length;c++)this.assign(arguments[c])}t=B.prototype;
+function aa(a){let c=0;for(let b=0,d;b<a.length;b++)(d=a[b])&&c<d.length&&(c=d.length);return c};const ba=/[^\p{L}\p{N}]+/u,ca=/(\d{3})/g,da=/(\D)(\d{3})/g,ea=/(\d{3})(\D)/g,x="".normalize&&/[\u0300-\u036f]/g;function y(a){if(!this||this.constructor!==y)return new y(...arguments);for(let c=0;c<arguments.length;c++)this.assign(arguments[c])}t=y.prototype;
 t.assign=function(a){this.normalize=u(a.normalize,!0,this.normalize);let c=a.include,b=c||a.exclude||a.split,d;if(b||""===b){if("object"===typeof b&&b.constructor!==RegExp){let e="";d=!c;c||(e+="\\p{Z}");b.letter&&(e+="\\p{L}");b.number&&(e+="\\p{N}",d=!!c);b.symbol&&(e+="\\p{S}");b.punctuation&&(e+="\\p{P}");b.control&&(e+="\\p{C}");if(b=b.char)e+="object"===typeof b?b.join(""):b;try{this.split=new RegExp("["+(c?"^":"")+e+"]+","u")}catch(g){this.split=/\s+/}}else this.split=b,d=!1===b||2>"a1a".split(b).length;
-this.numeric=u(a.numeric,d)}else{try{this.split=u(this.split,y)}catch(e){this.split=/\s+/}this.numeric=u(a.numeric,u(this.numeric,!0))}this.prepare=u(a.prepare,null,this.prepare);this.finalize=u(a.finalize,null,this.finalize);this.rtl=u(a.rtl,!1,this.rtl);this.dedupe=u(a.dedupe,!1,this.dedupe);this.filter=u((b=a.filter)&&new Set(b),null,this.filter);this.matcher=u((b=a.matcher)&&new Map(b),null,this.matcher);this.mapper=u((b=a.mapper)&&new Map(b),null,this.mapper);this.stemmer=u((b=a.stemmer)&&new Map(b),
+this.numeric=u(a.numeric,d)}else{try{this.split=u(this.split,ba)}catch(e){this.split=/\s+/}this.numeric=u(a.numeric,u(this.numeric,!0))}this.prepare=u(a.prepare,null,this.prepare);this.finalize=u(a.finalize,null,this.finalize);this.rtl=u(a.rtl,!1,this.rtl);this.dedupe=u(a.dedupe,!1,this.dedupe);this.filter=u((b=a.filter)&&new Set(b),null,this.filter);this.matcher=u((b=a.matcher)&&new Map(b),null,this.matcher);this.mapper=u((b=a.mapper)&&new Map(b),null,this.mapper);this.stemmer=u((b=a.stemmer)&&new Map(b),
 null,this.stemmer);this.replacer=u(a.replacer,null,this.replacer);this.minlength=u(a.minlength,1,this.minlength);this.maxlength=u(a.maxlength,0,this.maxlength);if(this.cache=b=u(a.cache,!0,this.cache))this.l=null,this.C="number"===typeof b?b:2E5,this.i=new Map,this.j=new Map,this.s=this.o=128;this.g="";this.v=null;this.h="";this.A=null;if(this.matcher)for(const e of this.matcher.keys())this.g+=(this.g?"|":"")+e;if(this.stemmer)for(const e of this.stemmer.keys())this.h+=(this.h?"|":"")+e;return this};
-t.addStemmer=function(a,c){this.stemmer||(this.stemmer=new Map);this.stemmer.set(a,c);this.h+=(this.h?"|":"")+a;this.A=null;this.cache&&C(this);return this};t.addFilter=function(a){this.filter||(this.filter=new Set);this.filter.add(a);this.cache&&C(this);return this};t.addMapper=function(a,c){if("object"===typeof a)return this.addReplacer(a,c);if(1<a.length)return this.addMatcher(a,c);this.mapper||(this.mapper=new Map);this.mapper.set(a,c);this.cache&&C(this);return this};
-t.addMatcher=function(a,c){if("object"===typeof a)return this.addReplacer(a,c);if(2>a.length&&(this.dedupe||this.mapper))return this.addMapper(a,c);this.matcher||(this.matcher=new Map);this.matcher.set(a,c);this.g+=(this.g?"|":"")+a;this.v=null;this.cache&&C(this);return this};t.addReplacer=function(a,c){if("string"===typeof a)return this.addMatcher(a,c);this.replacer||(this.replacer=[]);this.replacer.push(a,c);this.cache&&C(this);return this};
-t.encode=function(a){if(this.cache&&a.length<=this.o)if(this.l){if(this.i.has(a))return this.i.get(a)}else this.l=setTimeout(C,50,this);this.normalize&&("function"===typeof this.normalize?a=this.normalize(a):a=z?a.normalize("NFKD").replace(z,"").toLowerCase():a.toLowerCase());this.prepare&&(a=this.prepare(a));this.numeric&&3<a.length&&(a=a.replace(ba,"$1 $2").replace(ca,"$1 $2").replace(aa,"$1 "));const c=!(this.dedupe||this.mapper||this.filter||this.matcher||this.stemmer||this.replacer);let b=[],
-d=this.split||""===this.split?a.split(this.split):a;for(let g=0,f,h;g<d.length;g++)if((f=h=d[g])&&!(f.length<this.minlength))if(c)b.push(f);else if(!this.filter||!this.filter.has(f)){if(this.cache&&f.length<=this.s)if(this.l){var e=this.j.get(f);if(e||""===e){e&&b.push(e);continue}}else this.l=setTimeout(C,50,this);this.stemmer&&2<f.length&&(this.A||(this.A=new RegExp("(?!^)("+this.h+")$")),f=f.replace(this.A,k=>this.stemmer.get(k)),f.length<this.minlength||this.filter&&this.filter.has(f))&&(f="");
+t.addStemmer=function(a,c){this.stemmer||(this.stemmer=new Map);this.stemmer.set(a,c);this.h+=(this.h?"|":"")+a;this.A=null;this.cache&&z(this);return this};t.addFilter=function(a){this.filter||(this.filter=new Set);this.filter.add(a);this.cache&&z(this);return this};t.addMapper=function(a,c){if("object"===typeof a)return this.addReplacer(a,c);if(1<a.length)return this.addMatcher(a,c);this.mapper||(this.mapper=new Map);this.mapper.set(a,c);this.cache&&z(this);return this};
+t.addMatcher=function(a,c){if("object"===typeof a)return this.addReplacer(a,c);if(2>a.length&&(this.dedupe||this.mapper))return this.addMapper(a,c);this.matcher||(this.matcher=new Map);this.matcher.set(a,c);this.g+=(this.g?"|":"")+a;this.v=null;this.cache&&z(this);return this};t.addReplacer=function(a,c){if("string"===typeof a)return this.addMatcher(a,c);this.replacer||(this.replacer=[]);this.replacer.push(a,c);this.cache&&z(this);return this};
+t.encode=function(a){if(this.cache&&a.length<=this.o)if(this.l){if(this.i.has(a))return this.i.get(a)}else this.l=setTimeout(z,50,this);this.normalize&&("function"===typeof this.normalize?a=this.normalize(a):a=x?a.normalize("NFKD").replace(x,"").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,"$1 "));const c=!(this.dedupe||this.mapper||this.filter||this.matcher||this.stemmer||this.replacer);let b=[],
+d=this.split||""===this.split?a.split(this.split):a;for(let g=0,f,h;g<d.length;g++)if((f=h=d[g])&&!(f.length<this.minlength))if(c)b.push(f);else if(!this.filter||!this.filter.has(f)){if(this.cache&&f.length<=this.s)if(this.l){var e=this.j.get(f);if(e||""===e){e&&b.push(e);continue}}else this.l=setTimeout(z,50,this);this.stemmer&&2<f.length&&(this.A||(this.A=new RegExp("(?!^)("+this.h+")$")),f=f.replace(this.A,k=>this.stemmer.get(k)),f.length<this.minlength||this.filter&&this.filter.has(f))&&(f="");
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+function la(a,c,b){const d=[],e=w();let g;var f=a.length;let h;for(let k=f-1;0<=k;k--)if(h=(f=a[k])&&f.length)for(let l=0;l<h;l++)if(g=f[l],!e[g])if(e[g]=1,b)b--;else if(d.push(g),d.length===c)return d;return d};function N(a,c,b,d){if(!a.length)return a;if(1===a.length)return a=a[0],a=b||a.length>c?c?a.slice(b,b+c):a.slice(b):a,d?O.call(this,a):a;let e=[];for(let g=0,f,h;g<a.length;g++)if((f=a[g])&&(h=f.length)){if(b){if(b>=h){b-=h;continue}b<h&&(f=c?f.slice(b,b+c):f.slice(b),h=f.length,b=0)}h>c&&(f=f.slice(0,c),h=c);if(!e.length&&h>=c)return d?O.call(this,f):f;e.push(f);c-=h;if(!c)break}e=1<e.length?[].concat.apply([],e):e[0];return d?O.call(this,e):e};function P(a,c,b){var d=b[0];if(d.then)return Promise.all(b).then(function(n){return a[c].apply(a,n)});if(d[0]&&d[0].index)return a[c].apply(a,d);d=[];let e=[],g=0,f=0,h,k,l;for(let n=0,m;n<b.length;n++)if(m=b[n]){let r;if(m.constructor===Q)r=m.result;else if(m.constructor===Array)r=m;else if(g=m.limit||0,f=m.offset||0,l=m.suggest,k=m.resolve,h=m.enrich&&k,m.index)m.resolve=!1,r=m.index.search(m).result,m.resolve=k;else if(m.and)r=a.and(m.and);else if(m.or)r=a.or(m.or);else if(m.xor)r=a.xor(m.xor);
+else if(m.not)r=a.not(m.not);else continue;if(r.then)e.push(r);else if(r.length)d[n]=r;else if(!l&&("and"===c||"xor"===c)){d=[];break}}return{m:d,u:e,limit:g,offset:f,enrich:h,resolve:k,suggest:l}};Q.prototype.or=function(){const {m:a,u:c,limit:b,offset:d,enrich:e,resolve:g}=P(this,"or",arguments);return ma.call(this,a,c,b,d,e,g)};function ma(a,c,b,d,e,g){if(c.length){const f=this;return Promise.all(c).then(function(h){a=[];for(let k=0,l;k<h.length;k++)(l=h[k]).length&&(a[k]=l);return ma.call(f,a,[],b,d,e,g)})}a.length&&(this.result.length&&a.push(this.result),2>a.length?this.result=a[0]:(this.result=la(a,b,d),d=0));return g?this.resolve(b,d,e):this};Q.prototype.and=function(){let a=this.result.length,c,b,d,e;if(!a){const g=arguments[0];g&&(a=!!g.suggest,e=g.resolve,c=g.limit,b=g.offset,d=g.enrich&&e)}if(a){const {m:g,u:f,limit:h,offset:k,enrich:l,resolve:n,suggest:m}=P(this,"and",arguments);return na.call(this,g,f,h,k,l,n,m)}return e?this.resolve(c,b,d):this};
+function na(a,c,b,d,e,g,f){if(c.length){const h=this;return Promise.all(c).then(function(k){a=[];for(let l=0,n;l<k.length;l++)(n=k[l]).length&&(a[l]=n);return na.call(h,a,[],b,d,e,g,f)})}if(a.length)if(this.result.length&&a.unshift(this.result),2>a.length)this.result=a[0];else{if(c=aa(a))return this.result=ka(a,c,b,d,f),g?e?O.call(this.index,this.result):this.result:this;this.result=[]}else f||(this.result=a);return g?this.resolve(b,d,e):this};Q.prototype.xor=function(){const {m:a,u:c,limit:b,offset:d,enrich:e,resolve:g,suggest:f}=P(this,"xor",arguments);return oa.call(this,a,c,b,d,e,g,f)};
+function oa(a,c,b,d,e,g,f){if(c.length){const h=this;return Promise.all(c).then(function(k){a=[];for(let l=0,n;l<k.length;l++)(n=k[l]).length&&(a[l]=n);return oa.call(h,a,[],b,d,e,g,f)})}if(a.length)if(this.result.length&&a.unshift(this.result),2>a.length)this.result=a[0];else return this.result=pa.call(this,a,b,d,g,this.g),g?e?O.call(this.index,this.result):this.result:this;else f||(this.result=a);return g?this.resolve(b,d,e):this}
+function pa(a,c,b,d,e){const g=[],f=w();let h=0;for(let k=0,l;k<a.length;k++)if(l=a[k]){h<l.length&&(h=l.length);for(let n=0,m;n<l.length;n++)if(m=l[n])for(let r=0,q;r<m.length;r++)q=m[r],f[q]=f[q]?2:1}for(let k=0,l,n=0;k<h;k++)for(let m=0,r;m<a.length;m++)if(r=a[m])if(l=r[k])for(let q=0,p;q<l.length;q++)if(p=l[q],1===f[p])if(b)b--;else if(d){if(g.push(p),g.length===c)return g}else{const v=k+(m?e:0);g[v]||(g[v]=[]);g[v].push(p);if(++n===c)return g}return g};Q.prototype.not=function(){const {m:a,u:c,limit:b,offset:d,enrich:e,resolve:g,suggest:f}=P(this,"not",arguments);return qa.call(this,a,c,b,d,e,g,f)};function qa(a,c,b,d,e,g,f){if(c.length){const h=this;return Promise.all(c).then(function(k){a=[];for(let l=0,n;l<k.length;l++)(n=k[l]).length&&(a[l]=n);return qa.call(h,a,[],b,d,e,g,f)})}if(a.length&&this.result.length)this.result=ra.call(this,a,b,d,g);else if(g)return this.resolve(b,d,e);return g?e?O.call(this.index,this.result):this.result:this}
+function ra(a,c,b,d){const e=[];a=new Set(a.flat().flat());for(let g=0,f,h=0;g<this.result.length;g++)if(f=this.result[g])for(let k=0,l;k<f.length;k++)if(l=f[k],!a.has(l))if(b)b--;else if(d){if(e.push(l),e.length===c)return e}else if(e[g]||(e[g]=[]),e[g].push(l),++h===c)return e;return e};function Q(a){if(!this||this.constructor!==Q)return new Q(a);if(a&&a.index)return a.resolve=!1,this.index=a.index,this.g=a.boost||0,this.result=a.index.search(a).result,this;this.index=null;this.result=a||[];this.g=0}Q.prototype.limit=function(a){if(this.result.length){const c=[];for(let b=0,d;b<this.result.length;b++)if(d=this.result[b])if(d.length<=a){if(c[b]=d,a-=d.length,!a)break}else{c[b]=d.slice(0,a);break}this.result=c}return this};
+Q.prototype.offset=function(a){if(this.result.length){const c=[];for(let b=0,d;b<this.result.length;b++)if(d=this.result[b])d.length<=a?a-=d.length:(c[b]=d.slice(a),a=0);this.result=c}return this};Q.prototype.boost=function(a){this.g+=a;return this};Q.prototype.resolve=function(a,c,b){const d=this.result,e=this.index;this.result=this.index=null;return d.length?("object"===typeof a&&(b=a.enrich,c=a.offset,a=a.limit),N.call(e,d,a||100,c,b)):d};w();function O(a){if(!this||!this.store)return a;const c=Array(a.length);for(let b=0,d;b<a.length;b++)d=a[b],c[b]={id:d,doc:this.store.get(d)};return c};function S(a){this.limit=a&&!0!==a?a:1E3;this.cache=new Map;this.g=""}S.prototype.set=function(a,c){this.cache.set(this.g=a,c);this.cache.size>this.limit&&this.cache.delete(this.cache.keys().next().value)};S.prototype.get=function(a){const c=this.cache.get(a);c&&this.g!==a&&(this.cache.delete(a),this.cache.set(this.g=a,c));return c};S.prototype.remove=function(a){for(const c of this.cache){const b=c[0];c[1].includes(a)&&this.cache.delete(b)}};
+S.prototype.clear=function(){this.cache.clear();this.g=""};const sa={normalize:function(a){return a.toLowerCase()}};const ta={memory:{resolution:1},performance:{resolution:6,fastupdate:!0,context:{depth:1,resolution:3}},match:{tokenize:"forward"},score:{resolution:9,context:{depth:2,resolution:9}}};D.prototype.add=function(a,c,b,d){if(c&&(a||0===a)){if(!d&&!b&&this.reg.has(a))return this.update(a,c);c=this.encoder.encode(c);if(d=c.length){const l=w(),n=w(),m=this.depth,r=this.resolution;for(let q=0;q<d;q++){let p=c[this.rtl?d-1-q:q];var e=p.length;if(e&&(m||!n[p])){var g=this.score?this.score(c,p,q,null,0):T(r,d,q),f="";switch(this.tokenize){case "full":if(2<e){for(g=0;g<e;g++)for(var h=e;h>g;h--){f=p.substring(g,h);var k=this.score?this.score(c,p,q,f,g):T(r,d,q,e,g);U(this,n,f,k,a,b)}break}case "reverse":if(1<
+e){for(h=e-1;0<h;h--)f=p[h]+f,k=this.score?this.score(c,p,q,f,h):T(r,d,q,e,h),U(this,n,f,k,a,b);f=""}case "forward":if(1<e){for(h=0;h<e;h++)f+=p[h],U(this,n,f,g,a,b);break}default:if(U(this,n,p,g,a,b),m&&1<d&&q<d-1)for(e=w(),f=this.B,g=p,h=Math.min(m+1,d-q),e[g]=1,k=1;k<h;k++)if((p=c[this.rtl?d-1-q-k:q+k])&&!e[p]){e[p]=1;const v=this.score?this.score(c,g,q,p,k):T(f+(d/2>f?0:1),d,q,h-1,k-1),B=this.bidirectional&&p>g;U(this,l,B?g:p,v,a,b,B?p:g)}}}}this.fastupdate||this.reg.add(a)}}return this};
+function U(a,c,b,d,e,g,f){let h=f?a.ctx:a.map,k;if(!c[b]||f&&!(k=c[b])[f])f?(c=k||(c[b]=w()),c[f]=1,(k=h.get(f))?h=k:h.set(f,h=new Map)):c[b]=1,(k=h.get(b))?h=k:h.set(b,h=[]),h=h[d]||(h[d]=[]),g&&h.includes(e)||(h.push(e),a.fastupdate&&((c=a.reg.get(e))?c.push(h):a.reg.set(e,[h])))}function T(a,c,b,d,e){return b&&1<a?c+(d||0)<=a?b+(e||0):(a-1)/(c+(d||0))*(b+(e||0))+1|0:0};D.prototype.search=function(a,c,b){b||(c||"object"!==typeof a?"object"===typeof c&&(b=c,c=0):(b=a,a=""));var d=[],e=0;if(b){a=b.query||a;c=b.limit||c;e=b.offset||0;var g=b.context;var f=b.suggest;var h=!0;var k=b.resolution}else h=!0;b=this.encoder.encode(a);a=b.length;c=c||(h?100:0);if(1===a)return ua.call(this,b[0],"",c,e,h);g=this.depth&&!1!==g;if(2===a&&g&&!f)return ua.call(this,b[0],b[1],c,e,h);h=w();let l=0;if(1<a&&g){var n=b[0];l=1}k||0===k||(k=n?this.B:this.resolution);for(let p,v;l<a;l++){if((v=
+b[l])&&!h[v]){h[v]=1;p=va(this,v,n);a:{g=p;var m=d,r=f,q=k;let B=[];if(g&&g.length){if(g.length<=q){m.push(g);p=void 0;break a}for(let R=0,ja;R<q;R++)if(ja=g[R])B[R]=ja;if(B.length){m.push(B);p=void 0;break a}}p=r?void 0:B}if(p){d=p;break}n&&(f&&p&&d.length||(n=v))}f&&n&&l===a-1&&!d.length&&(n="",l=-1,h=w())}a:{n=d.length;a=d;if(1<n)a=ka(d,k,c,e,f);else if(1===n){f=N.call(null,d[0],c,e);break a}f=a}return f};
+function ua(a,c,b,d,e){a=va(this,a,c);e=!0;return a&&a.length?e?N.call(this,a,b,d):new Q(a):e?[]:new Q}function va(a,c,b){let d;b&&(d=a.bidirectional&&c>b)&&(d=b,b=c,c=d);a=b?(a=a.ctx.get(b))&&a.get(c):a.map.get(c);return a};D.prototype.remove=function(a,c){const b=this.reg.size&&(this.fastupdate?this.reg.get(a):this.reg.has(a));if(b){if(this.fastupdate)for(let d=0,e;d<b.length;d++){if(e=b[d])if(2>e.length)e.pop();else{const g=e.indexOf(a);g===b.length-1?e.pop():e.splice(g,1)}}else V(this.map,a),this.depth&&V(this.ctx,a);c||this.reg.delete(a)}this.cache&&this.cache.remove(a);return this};
+function V(a,c){let b=0;if(a.constructor===Array)for(let d=0,e,g;d<a.length;d++){if((e=a[d])&&e.length)if(g=e.indexOf(c),0<=g){1<e.length?(e.splice(g,1),b++):delete a[d];break}else b++}else for(let d of a.entries()){const e=d[0],g=V(d[1],c);g?b+=g:a.delete(e)}return b};function D(a,c){if(!this||this.constructor!==D)return new D(a);if(a){var b="string"===typeof a?a:a.preset;b&&(a=Object.assign({},ta[b],a))}else a={};b=a.context;const d=!0===b?{depth:1}:b||{},e=a.encode||a.encoder||sa;this.encoder=e.encode?e:"object"===typeof e?new y(e):{encode:e};this.resolution=a.resolution||9;this.tokenize=b=a.tokenize||"strict";this.depth="strict"===b&&d.depth||0;this.bidirectional=!1!==d.bidirectional;this.fastupdate=!!a.fastupdate;this.score=a.score||null;b=!1;this.map=new Map;
+this.ctx=new Map;this.reg=c||(this.fastupdate?new Map:new Set);this.B=d.resolution||3;this.rtl=e.rtl||a.rtl||!1;this.cache=(b=a.cache||null)&&new S(b)}t=D.prototype;t.clear=function(){this.map.clear();this.ctx.clear();this.reg.clear();this.cache&&this.cache.clear();return this};t.append=function(a,c){return this.add(a,c,!0)};t.contain=function(a){return this.reg.has(a)};t.update=function(a,c){const b=this,d=this.remove(a);return d&&d.then?d.then(()=>b.add(a,c)):this.add(a,c)};
+function W(a){let c=0;if(a.constructor===Array)for(let b=0,d;b<a.length;b++)(d=a[b])&&(c+=d.length);else for(const b of a){const d=b[0],e=W(b[1]);e?c+=e:a.delete(d)}return c}t.cleanup=function(){if(!this.fastupdate)return this;W(this.map);this.depth&&W(this.ctx);return this};
+t.searchCache=function(a,c,b){a=("object"===typeof a?""+a.query:a).toLowerCase();this.cache||(this.cache=new S);let d=this.cache.get(a);if(!d){d=this.search(a,c,b);if(d.then){const e=this;d.then(function(g){e.cache.set(a,g);return g})}this.cache.set(a,d)}return d};const X={Index:D,Charset:null,Encoder:y,Document:null,Worker:null,Resolver:null,IndexedDB:null,Language:{}},Y="undefined"!==typeof self?self:"undefined"!==typeof global?global:"undefined"!==typeof window?window:{};let Z;(Z=Y.define)&&Z.amd?Z([],function(){return X}):"object"===typeof Y.exports?Y.exports=X:Y.FlexSearch=X;}(this||self));
diff --git a/dist/flexsearch.light.module.debug.js b/dist/flexsearch.light.module.debug.js
index aba225d..259b656 100644
--- a/dist/flexsearch.light.module.debug.js
+++ b/dist/flexsearch.light.module.debug.js
@@ -1,5 +1,5 @@
 /**!
- * FlexSearch.js v0.8.107 (Bundle/Debug)
+ * FlexSearch.js v0.8.108 (Bundle/Debug)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
@@ -46,23 +46,23 @@ function u(a, c, b) {
 function w() {
   return Object.create(null);
 }
-function x(a) {
+function aa(a) {
   let c = 0;
   for (let b = 0, d; b < a.length; b++) {
     (d = a[b]) && c < d.length && (c = d.length);
   }
   return c;
 }
-;const y = /[^\p{L}\p{N}]+/u, z = /(\d{3})/g, B = /(\D)(\d{3})/g, aa = /(\d{3})(\D)/g, C = "".normalize && /[\u0300-\u036f]/g;
-function D(a) {
-  if (!this || this.constructor !== D) {
-    return new D(...arguments);
+;const ba = /[^\p{L}\p{N}]+/u, ca = /(\d{3})/g, da = /(\D)(\d{3})/g, ea = /(\d{3})(\D)/g, x = "".normalize && /[\u0300-\u036f]/g;
+function y(a) {
+  if (!this || this.constructor !== y) {
+    return new y(...arguments);
   }
   for (let c = 0; c < arguments.length; c++) {
     this.assign(arguments[c]);
   }
 }
-t = D.prototype;
+t = y.prototype;
 t.assign = function(a) {
   this.normalize = u(a.normalize, !0, this.normalize);
   let c = a.include, b = c || a.exclude || a.split, d;
@@ -90,7 +90,7 @@ t.assign = function(a) {
     this.numeric = u(a.numeric, d);
   } else {
     try {
-      this.split = u(this.split, y);
+      this.split = u(this.split, ba);
     } catch (e) {
       console.warn("This platform does not support unicode regex. It falls back to using simple whitespace splitter instead: /s+/."), this.split = /\s+/;
     }
@@ -131,13 +131,13 @@ t.addStemmer = function(a, c) {
   this.stemmer.set(a, c);
   this.h += (this.h ? "|" : "") + a;
   this.A = null;
-  this.cache && E(this);
+  this.cache && z(this);
   return this;
 };
 t.addFilter = function(a) {
   this.filter || (this.filter = new Set());
   this.filter.add(a);
-  this.cache && E(this);
+  this.cache && z(this);
   return this;
 };
 t.addMapper = function(a, c) {
@@ -149,7 +149,7 @@ t.addMapper = function(a, c) {
   }
   this.mapper || (this.mapper = new Map());
   this.mapper.set(a, c);
-  this.cache && E(this);
+  this.cache && z(this);
   return this;
 };
 t.addMatcher = function(a, c) {
@@ -163,7 +163,7 @@ t.addMatcher = function(a, c) {
   this.matcher.set(a, c);
   this.g += (this.g ? "|" : "") + a;
   this.v = null;
-  this.cache && E(this);
+  this.cache && z(this);
   return this;
 };
 t.addReplacer = function(a, c) {
@@ -172,7 +172,7 @@ t.addReplacer = function(a, c) {
   }
   this.replacer || (this.replacer = []);
   this.replacer.push(a, c);
-  this.cache && E(this);
+  this.cache && z(this);
   return this;
 };
 t.encode = function(a) {
@@ -182,12 +182,12 @@ t.encode = function(a) {
         return this.i.get(a);
       }
     } else {
-      this.l = setTimeout(E, 50, this);
+      this.l = setTimeout(z, 50, this);
     }
   }
-  this.normalize && ("function" === typeof this.normalize ? a = this.normalize(a) : a = C ? a.normalize("NFKD").replace(C, "").toLowerCase() : a.toLowerCase());
+  this.normalize && ("function" === typeof this.normalize ? a = this.normalize(a) : a = x ? a.normalize("NFKD").replace(x, "").toLowerCase() : a.toLowerCase());
   this.prepare && (a = this.prepare(a));
-  this.numeric && 3 < a.length && (a = a.replace(B, "$1 $2").replace(aa, "$1 $2").replace(z, "$1 "));
+  this.numeric && 3 < a.length && (a = a.replace(da, "$1 $2").replace(ea, "$1 $2").replace(ca, "$1 "));
   const c = !(this.dedupe || this.mapper || this.filter || this.matcher || this.stemmer || this.replacer);
   let b = [], d = this.split || "" === this.split ? a.split(this.split) : a;
   for (let g = 0, f, h; g < d.length; g++) {
@@ -204,7 +204,7 @@ t.encode = function(a) {
                 continue;
               }
             } else {
-              this.l = setTimeout(E, 50, this);
+              this.l = setTimeout(z, 50, this);
             }
           }
           this.stemmer && 2 < f.length && (this.A || (this.A = new RegExp("(?!^)(" + this.h + ")$")), f = f.replace(this.A, k => this.stemmer.get(k)), f.length < this.minlength || this.filter && this.filter.has(f)) && (f = "");
@@ -231,12 +231,125 @@ t.encode = function(a) {
   this.cache && a.length <= this.o && (this.i.set(a, b), this.i.size > this.C && (this.i.clear(), this.o = this.o / 1.1 | 0));
   return b;
 };
-function E(a) {
+function z(a) {
   a.l = null;
   a.i.clear();
   a.j.clear();
 }
-;function F(a, c, b, d, e) {
+;let A, C;
+async function fa(a) {
+  a = a.data;
+  const c = a.task, b = a.id;
+  let d = a.args;
+  switch(c) {
+    case "init":
+      C = a.options || {};
+      (a = a.factory) ? (Function("return " + a)()(self), A = new self.FlexSearch.Index(C), delete self.FlexSearch) : A = new D(C);
+      postMessage({id:b});
+      break;
+    default:
+      let e;
+      "export" === c && (d = [C.export]);
+      "import" === c ? await C.import.call(A, A) : e = A[c].apply(A, d);
+      postMessage("search" === c ? {id:b, msg:e} : {id:b});
+  }
+}
+;let E, F;
+const G = {}, H = {};
+function ia(a) {
+  E = 0;
+  G[a] = H[a];
+}
+function I(a) {
+  this[a + "Async"] = function() {
+    const c = arguments;
+    var b = c[c.length - 1];
+    let d;
+    "function" === typeof b && (d = b, delete c[c.length - 1]);
+    E || (E = setTimeout(ia, 0, a), F = Date.now());
+    H[a] || (H[a] = G[a] = 1000);
+    if (!--G[a]) {
+      G[a] = H[a] = H[a] * this.priority * this.priority * 3 / (Date.now() - F) | 0 || 1;
+      E = clearTimeout(E);
+      const g = this;
+      return new Promise(f => {
+        setTimeout(function() {
+          f(g[a + "Async"].apply(g, c));
+        }, 0);
+      });
+    }
+    const e = this[a].apply(this, c);
+    b = e.then ? e : new Promise(g => g(e));
+    d && b.then(d);
+    return b;
+  };
+}
+;let J = 0;
+function K(a = {}) {
+  function c(f) {
+    function h(k) {
+      k = k.data || k;
+      const l = k.id, n = l && e.g[l];
+      n && (n(k.msg), delete e.g[l]);
+    }
+    this.worker = f;
+    this.g = w();
+    if (this.worker) {
+      d ? this.worker.on("message", h) : this.worker.onmessage = h;
+      if (a.config) {
+        return new Promise(function(k) {
+          e.g[++J] = function() {
+            k(e);
+          };
+          e.worker.postMessage({id:J, task:"init", factory:b, options:a});
+        });
+      }
+      this.worker.postMessage({task:"init", factory:b, options:a});
+      return this;
+    }
+  }
+  if (!this || this.constructor !== K) {
+    return new K(a);
+  }
+  let b = "undefined" !== typeof self ? self._factory : "undefined" !== typeof window ? window._factory : null;
+  b && (b = b.toString());
+  const d = "undefined" === typeof window, e = this, g = ja(b, d, a.worker);
+  return g.then ? g.then(function(f) {
+    return c.call(e, f);
+  }) : c.call(this, g);
+}
+L("add");
+L("append");
+L("search");
+L("update");
+L("remove");
+L("clear");
+L("export");
+L("import");
+var M = K.prototype;
+I.call(M, "add");
+I.call(M, "append");
+I.call(M, "search");
+I.call(M, "update");
+I.call(M, "remove");
+function L(a) {
+  K.prototype[a] = async function() {
+    const c = this, b = [].slice.call(arguments);
+    var d = b[b.length - 1];
+    let e;
+    "function" === typeof d && (e = d, b.splice(b.length - 1, 1));
+    d = new Promise(function(g) {
+      c.g[++J] = g;
+      c.worker.postMessage({task:a, id:J, args:b});
+    });
+    return e ? (d.then(e), this) : d;
+  };
+}
+function ja(a, c, b) {
+  return c ? "undefined" !== typeof module ? new (require("worker_threads")["Worker"])(__dirname + "/node/node.js") : import("worker_threads").then(function(worker){ return new worker["Worker"](import.meta.dirname + "/node/node.mjs"); }) : a ? new window.Worker(URL.createObjectURL(new Blob(["onmessage=" + fa.toString()], {type:"text/javascript"}))) : new window.Worker("string" === typeof b ? b : import.meta.url.replace("/worker.js", "/worker/worker.js").replace("flexsearch.bundle.module.min.js", 
+  "module/worker/worker.js"), {type:"module"});
+}
+;function N(a, c, b, d, e) {
   const g = a.length;
   let f = [], h, k;
   h = w();
@@ -251,7 +364,7 @@ function E(a) {
   }
   if (a = f.length) {
     if (e) {
-      f = 1 < f.length ? G(f, b, d) : (f = f[0]).length > b || d ? f.slice(d, b + d) : f;
+      f = 1 < f.length ? O(f, b, d) : (f = f[0]).length > b || d ? f.slice(d, b + d) : f;
     } else {
       if (a < g) {
         return [];
@@ -266,7 +379,7 @@ function E(a) {
   }
   return f;
 }
-function G(a, c, b) {
+function O(a, c, b) {
   const d = [], e = w();
   let g;
   var f = a.length;
@@ -288,12 +401,12 @@ function G(a, c, b) {
   }
   return d;
 }
-;function I(a, c, b, d) {
+;function P(a, c, b, d) {
   if (!a.length) {
     return a;
   }
   if (1 === a.length) {
-    return a = a[0], a = b || a.length > c ? c ? a.slice(b, b + c) : a.slice(b) : a, d ? J.call(this, a) : a;
+    return a = a[0], a = b || a.length > c ? c ? a.slice(b, b + c) : a.slice(b) : a, d ? Q.call(this, a) : a;
   }
   let e = [];
   for (let g = 0, f, h; g < a.length; g++) {
@@ -307,7 +420,7 @@ function G(a, c, b) {
       }
       h > c && (f = f.slice(0, c), h = c);
       if (!e.length && h >= c) {
-        return d ? J.call(this, f) : f;
+        return d ? Q.call(this, f) : f;
       }
       e.push(f);
       c -= h;
@@ -317,9 +430,9 @@ function G(a, c, b) {
     }
   }
   e = 1 < e.length ? [].concat.apply([], e) : e[0];
-  return d ? J.call(this, e) : e;
+  return d ? Q.call(this, e) : e;
 }
-;function K(a, c, b) {
+;function S(a, c, b) {
   var d = b[0];
   if (d.then) {
     return Promise.all(b).then(function(n) {
@@ -334,7 +447,7 @@ function G(a, c, b) {
   for (let n = 0, m; n < b.length; n++) {
     if (m = b[n]) {
       let r;
-      if (m.constructor === L) {
+      if (m.constructor === T) {
         r = m.result;
       } else if (m.constructor === Array) {
         r = m;
@@ -365,11 +478,11 @@ function G(a, c, b) {
   }
   return {m:d, u:e, limit:g, offset:f, enrich:h, resolve:k, suggest:l};
 }
-;L.prototype.or = function() {
-  const {m:a, u:c, limit:b, offset:d, enrich:e, resolve:g} = K(this, "or", arguments);
-  return M.call(this, a, c, b, d, e, g);
+;T.prototype.or = function() {
+  const {m:a, u:c, limit:b, offset:d, enrich:e, resolve:g} = S(this, "or", arguments);
+  return U.call(this, a, c, b, d, e, g);
 };
-function M(a, c, b, d, e, g) {
+function U(a, c, b, d, e, g) {
   if (c.length) {
     const f = this;
     return Promise.all(c).then(function(h) {
@@ -377,25 +490,25 @@ function M(a, c, b, d, e, g) {
       for (let k = 0, l; k < h.length; k++) {
         (l = h[k]).length && (a[k] = l);
       }
-      return M.call(f, a, [], b, d, e, g);
+      return U.call(f, a, [], b, d, e, g);
     });
   }
-  a.length && (this.result.length && a.push(this.result), 2 > a.length ? this.result = a[0] : (this.result = G(a, b, d), d = 0));
+  a.length && (this.result.length && a.push(this.result), 2 > a.length ? this.result = a[0] : (this.result = O(a, b, d), d = 0));
   return g ? this.resolve(b, d, e) : this;
 }
-;L.prototype.and = function() {
+;T.prototype.and = function() {
   let a = this.result.length, c, b, d, e;
   if (!a) {
     const g = arguments[0];
     g && (a = !!g.suggest, e = g.resolve, c = g.limit, b = g.offset, d = g.enrich && e);
   }
   if (a) {
-    const {m:g, u:f, limit:h, offset:k, enrich:l, resolve:n, suggest:m} = K(this, "and", arguments);
-    return N.call(this, g, f, h, k, l, n, m);
+    const {m:g, u:f, limit:h, offset:k, enrich:l, resolve:n, suggest:m} = S(this, "and", arguments);
+    return ka.call(this, g, f, h, k, l, n, m);
   }
   return e ? this.resolve(c, b, d) : this;
 };
-function N(a, c, b, d, e, g, f) {
+function ka(a, c, b, d, e, g, f) {
   if (c.length) {
     const h = this;
     return Promise.all(c).then(function(k) {
@@ -403,15 +516,15 @@ function N(a, c, b, d, e, g, f) {
       for (let l = 0, n; l < k.length; l++) {
         (n = k[l]).length && (a[l] = n);
       }
-      return N.call(h, a, [], b, d, e, g, f);
+      return ka.call(h, a, [], b, d, e, g, f);
     });
   }
   if (a.length) {
     if (this.result.length && a.unshift(this.result), 2 > a.length) {
       this.result = a[0];
     } else {
-      if (c = x(a)) {
-        return this.result = F(a, c, b, d, f), g ? e ? J.call(this.index, this.result) : this.result : this;
+      if (c = aa(a)) {
+        return this.result = N(a, c, b, d, f), g ? e ? Q.call(this.index, this.result) : this.result : this;
       }
       this.result = [];
     }
@@ -420,11 +533,11 @@ function N(a, c, b, d, e, g, f) {
   }
   return g ? this.resolve(b, d, e) : this;
 }
-;L.prototype.xor = function() {
-  const {m:a, u:c, limit:b, offset:d, enrich:e, resolve:g, suggest:f} = K(this, "xor", arguments);
-  return O.call(this, a, c, b, d, e, g, f);
+;T.prototype.xor = function() {
+  const {m:a, u:c, limit:b, offset:d, enrich:e, resolve:g, suggest:f} = S(this, "xor", arguments);
+  return la.call(this, a, c, b, d, e, g, f);
 };
-function O(a, c, b, d, e, g, f) {
+function la(a, c, b, d, e, g, f) {
   if (c.length) {
     const h = this;
     return Promise.all(c).then(function(k) {
@@ -432,21 +545,21 @@ function O(a, c, b, d, e, g, f) {
       for (let l = 0, n; l < k.length; l++) {
         (n = k[l]).length && (a[l] = n);
       }
-      return O.call(h, a, [], b, d, e, g, f);
+      return la.call(h, a, [], b, d, e, g, f);
     });
   }
   if (a.length) {
     if (this.result.length && a.unshift(this.result), 2 > a.length) {
       this.result = a[0];
     } else {
-      return this.result = ba.call(this, a, b, d, g, this.g), g ? e ? J.call(this.index, this.result) : this.result : this;
+      return this.result = ma.call(this, a, b, d, g, this.g), g ? e ? Q.call(this.index, this.result) : this.result : this;
     }
   } else {
     f || (this.result = a);
   }
   return g ? this.resolve(b, d, e) : this;
 }
-function ba(a, c, b, d, e) {
+function ma(a, c, b, d, e) {
   const g = [], f = w();
   let h = 0;
   for (let k = 0, l; k < a.length; k++) {
@@ -491,11 +604,11 @@ function ba(a, c, b, d, e) {
   }
   return g;
 }
-;L.prototype.not = function() {
-  const {m:a, u:c, limit:b, offset:d, enrich:e, resolve:g, suggest:f} = K(this, "not", arguments);
-  return P.call(this, a, c, b, d, e, g, f);
+;T.prototype.not = function() {
+  const {m:a, u:c, limit:b, offset:d, enrich:e, resolve:g, suggest:f} = S(this, "not", arguments);
+  return na.call(this, a, c, b, d, e, g, f);
 };
-function P(a, c, b, d, e, g, f) {
+function na(a, c, b, d, e, g, f) {
   if (c.length) {
     const h = this;
     return Promise.all(c).then(function(k) {
@@ -503,17 +616,17 @@ function P(a, c, b, d, e, g, f) {
       for (let l = 0, n; l < k.length; l++) {
         (n = k[l]).length && (a[l] = n);
       }
-      return P.call(h, a, [], b, d, e, g, f);
+      return na.call(h, a, [], b, d, e, g, f);
     });
   }
   if (a.length && this.result.length) {
-    this.result = ca.call(this, a, b, d, g);
+    this.result = oa.call(this, a, b, d, g);
   } else if (g) {
     return this.resolve(b, d, e);
   }
-  return g ? e ? J.call(this.index, this.result) : this.result : this;
+  return g ? e ? Q.call(this.index, this.result) : this.result : this;
 }
-function ca(a, c, b, d) {
+function oa(a, c, b, d) {
   const e = [];
   a = new Set(a.flat().flat());
   for (let g = 0, f, h = 0; g < this.result.length; g++) {
@@ -539,9 +652,9 @@ function ca(a, c, b, d) {
   }
   return e;
 }
-;function L(a) {
-  if (!this || this.constructor !== L) {
-    return new L(a);
+;function T(a) {
+  if (!this || this.constructor !== T) {
+    return new T(a);
   }
   if (a && a.index) {
     return a.resolve = !1, this.index = a.index, this.g = a.boost || 0, this.result = a.index.search(a).result, this;
@@ -550,7 +663,7 @@ function ca(a, c, b, d) {
   this.result = a || [];
   this.g = 0;
 }
-L.prototype.limit = function(a) {
+T.prototype.limit = function(a) {
   if (this.result.length) {
     const c = [];
     for (let b = 0, d; b < this.result.length; b++) {
@@ -569,7 +682,7 @@ L.prototype.limit = function(a) {
   }
   return this;
 };
-L.prototype.offset = function(a) {
+T.prototype.offset = function(a) {
   if (this.result.length) {
     const c = [];
     for (let b = 0, d; b < this.result.length; b++) {
@@ -581,17 +694,17 @@ L.prototype.offset = function(a) {
   }
   return this;
 };
-L.prototype.boost = function(a) {
+T.prototype.boost = function(a) {
   this.g += a;
   return this;
 };
-L.prototype.resolve = function(a, c, b) {
+T.prototype.resolve = function(a, c, b) {
   const d = this.result, e = this.index;
   this.result = this.index = null;
-  return d.length ? ("object" === typeof a && (b = a.enrich, c = a.offset, a = a.limit), I.call(e, d, a || 100, c, b)) : d;
+  return d.length ? ("object" === typeof a && (b = a.enrich, c = a.offset, a = a.limit), P.call(e, d, a || 100, c, b)) : d;
 };
 w();
-function J(a) {
+function Q(a) {
   if (!this || !this.store) {
     return a;
   }
@@ -601,35 +714,35 @@ function J(a) {
   }
   return c;
 }
-;function Q(a) {
+;function V(a) {
   this.limit = a && !0 !== a ? a : 1000;
   this.cache = new Map();
   this.g = "";
 }
-Q.prototype.set = function(a, c) {
+V.prototype.set = function(a, c) {
   this.cache.set(this.g = a, c);
   this.cache.size > this.limit && this.cache.delete(this.cache.keys().next().value);
 };
-Q.prototype.get = function(a) {
+V.prototype.get = function(a) {
   const c = this.cache.get(a);
   c && this.g !== a && (this.cache.delete(a), this.cache.set(this.g = a, c));
   return c;
 };
-Q.prototype.remove = function(a) {
+V.prototype.remove = function(a) {
   for (const c of this.cache) {
     const b = c[0];
     c[1].includes(a) && this.cache.delete(b);
   }
 };
-Q.prototype.clear = function() {
+V.prototype.clear = function() {
   this.cache.clear();
   this.g = "";
 };
-const da = {normalize:function(a) {
+const pa = {normalize:function(a) {
   return a.toLowerCase();
 }};
-const R = {memory:{resolution:1}, performance:{resolution:6, fastupdate:!0, context:{depth:1, resolution:3}}, match:{tokenize:"forward"}, score:{resolution:9, context:{depth:2, resolution:9}}};
-S.prototype.add = function(a, c, b, d) {
+const qa = {memory:{resolution:1}, performance:{resolution:6, fastupdate:!0, context:{depth:1, resolution:3}}, match:{tokenize:"forward"}, score:{resolution:9, context:{depth:2, resolution:9}}};
+D.prototype.add = function(a, c, b, d) {
   if (c && (a || 0 === a)) {
     if (!d && !b && this.reg.has(a)) {
       return this.update(a, c);
@@ -641,15 +754,15 @@ S.prototype.add = function(a, c, b, d) {
         let p = c[this.rtl ? d - 1 - q : q];
         var e = p.length;
         if (e && (m || !n[p])) {
-          var g = this.score ? this.score(c, p, q, null, 0) : T(r, d, q), f = "";
+          var g = this.score ? this.score(c, p, q, null, 0) : W(r, d, q), f = "";
           switch(this.tokenize) {
             case "full":
               if (2 < e) {
                 for (g = 0; g < e; g++) {
                   for (var h = e; h > g; h--) {
                     f = p.substring(g, h);
-                    var k = this.score ? this.score(c, p, q, f, g) : T(r, d, q, e, g);
-                    U(this, n, f, k, a, b);
+                    var k = this.score ? this.score(c, p, q, f, g) : W(r, d, q, e, g);
+                    X(this, n, f, k, a, b);
                   }
                 }
                 break;
@@ -657,24 +770,24 @@ S.prototype.add = function(a, c, b, d) {
             case "reverse":
               if (1 < e) {
                 for (h = e - 1; 0 < h; h--) {
-                  f = p[h] + f, k = this.score ? this.score(c, p, q, f, h) : T(r, d, q, e, h), U(this, n, f, k, a, b);
+                  f = p[h] + f, k = this.score ? this.score(c, p, q, f, h) : W(r, d, q, e, h), X(this, n, f, k, a, b);
                 }
                 f = "";
               }
             case "forward":
               if (1 < e) {
                 for (h = 0; h < e; h++) {
-                  f += p[h], U(this, n, f, g, a, b);
+                  f += p[h], X(this, n, f, g, a, b);
                 }
                 break;
               }
             default:
-              if (U(this, n, p, g, a, b), m && 1 < d && q < d - 1) {
+              if (X(this, n, p, g, a, b), m && 1 < d && q < d - 1) {
                 for (e = w(), f = this.B, g = p, h = Math.min(m + 1, d - q), e[g] = 1, k = 1; k < h; k++) {
                   if ((p = c[this.rtl ? d - 1 - q - k : q + k]) && !e[p]) {
                     e[p] = 1;
-                    const v = this.score ? this.score(c, g, q, p, k) : T(f + (d / 2 > f ? 0 : 1), d, q, h - 1, k - 1), A = this.bidirectional && p > g;
-                    U(this, l, A ? g : p, v, a, b, A ? p : g);
+                    const v = this.score ? this.score(c, g, q, p, k) : W(f + (d / 2 > f ? 0 : 1), d, q, h - 1, k - 1), B = this.bidirectional && p > g;
+                    X(this, l, B ? g : p, v, a, b, B ? p : g);
                   }
                 }
               }
@@ -686,16 +799,16 @@ S.prototype.add = function(a, c, b, d) {
   }
   return this;
 };
-function U(a, c, b, d, e, g, f) {
+function X(a, c, b, d, e, g, f) {
   let h = f ? a.ctx : a.map, k;
   if (!c[b] || f && !(k = c[b])[f]) {
     f ? (c = k || (c[b] = w()), c[f] = 1, (k = h.get(f)) ? h = k : h.set(f, h = new Map())) : c[b] = 1, (k = h.get(b)) ? h = k : h.set(b, h = []), h = h[d] || (h[d] = []), g && h.includes(e) || (h.push(e), a.fastupdate && ((c = a.reg.get(e)) ? c.push(h) : a.reg.set(e, [h])));
   }
 }
-function T(a, c, b, d, e) {
+function W(a, c, b, d, e) {
   return b && 1 < a ? c + (d || 0) <= a ? b + (e || 0) : (a - 1) / (c + (d || 0)) * (b + (e || 0)) + 1 | 0 : 0;
 }
-;S.prototype.search = function(a, c, b) {
+;D.prototype.search = function(a, c, b) {
   b || (c || "object" !== typeof a ? "object" === typeof c && (b = c, c = 0) : (b = a, a = ""));
   var d = [], e = 0;
   if (b) {
@@ -713,11 +826,11 @@ function T(a, c, b, d, e) {
   a = b.length;
   c = c || (h ? 100 : 0);
   if (1 === a) {
-    return W.call(this, b[0], "", c, e, h);
+    return ra.call(this, b[0], "", c, e, h);
   }
   g = this.depth && !1 !== g;
   if (2 === a && g && !f) {
-    return W.call(this, b[0], b[1], c, e, h);
+    return ra.call(this, b[0], b[1], c, e, h);
   }
   h = w();
   let l = 0;
@@ -729,29 +842,29 @@ function T(a, c, b, d, e) {
   for (let p, v; l < a; l++) {
     if ((v = b[l]) && !h[v]) {
       h[v] = 1;
-      p = X(this, v, n);
+      p = sa(this, v, n);
       a: {
         g = p;
         var m = d, r = f, q = k;
-        let A = [];
+        let B = [];
         if (g && g.length) {
           if (g.length <= q) {
             m.push(g);
             p = void 0;
             break a;
           }
-          for (let H = 0, V; H < q; H++) {
-            if (V = g[H]) {
-              A[H] = V;
+          for (let R = 0, ha; R < q; R++) {
+            if (ha = g[R]) {
+              B[R] = ha;
             }
           }
-          if (A.length) {
-            m.push(A);
+          if (B.length) {
+            m.push(B);
             p = void 0;
             break a;
           }
         }
-        p = r ? void 0 : A;
+        p = r ? void 0 : B;
       }
       if (p) {
         d = p;
@@ -765,27 +878,27 @@ function T(a, c, b, d, e) {
     n = d.length;
     a = d;
     if (1 < n) {
-      a = F(d, k, c, e, f);
+      a = N(d, k, c, e, f);
     } else if (1 === n) {
-      f = I.call(null, d[0], c, e);
+      f = P.call(null, d[0], c, e);
       break a;
     }
     f = a;
   }
   return f;
 };
-function W(a, c, b, d, e) {
-  a = X(this, a, c);
+function ra(a, c, b, d, e) {
+  a = sa(this, a, c);
   e = !0;
-  return a && a.length ? e ? I.call(this, a, b, d) : new L(a) : e ? [] : new L();
+  return a && a.length ? e ? P.call(this, a, b, d) : new T(a) : e ? [] : new T();
 }
-function X(a, c, b) {
+function sa(a, c, b) {
   let d;
   b && (d = a.bidirectional && c > b) && (d = b, b = c, c = d);
   a = b ? (a = a.ctx.get(b)) && a.get(c) : a.map.get(c);
   return a;
 }
-;S.prototype.remove = function(a, c) {
+;D.prototype.remove = function(a, c) {
   const b = this.reg.size && (this.fastupdate ? this.reg.get(a) : this.reg.has(a));
   if (b) {
     if (this.fastupdate) {
@@ -828,19 +941,19 @@ function Y(a, c) {
   }
   return b;
 }
-;function S(a, c) {
-  if (!this || this.constructor !== S) {
-    return new S(a);
+;function D(a, c) {
+  if (!this || this.constructor !== D) {
+    return new D(a);
   }
   if (a) {
     var b = "string" === typeof a ? a : a.preset;
-    b && (R[b] || console.warn("Preset not found: " + b), a = Object.assign({}, R[b], a));
+    b && (qa[b] || console.warn("Preset not found: " + b), a = Object.assign({}, qa[b], a));
   } else {
     a = {};
   }
   b = a.context;
-  const d = !0 === b ? {depth:1} : b || {}, e = a.encode || a.encoder || da;
-  this.encoder = e.encode ? e : "object" === typeof e ? new D(e) : {encode:e};
+  const d = !0 === b ? {depth:1} : b || {}, e = a.encode || a.encoder || pa;
+  this.encoder = e.encode ? e : "object" === typeof e ? new y(e) : {encode:e};
   this.resolution = a.resolution || 9;
   this.tokenize = b = a.tokenize || "strict";
   this.depth = "strict" === b && d.depth || 0;
@@ -853,9 +966,9 @@ function Y(a, c) {
   this.reg = c || (this.fastupdate ? new Map() : new Set());
   this.B = d.resolution || 3;
   this.rtl = e.rtl || a.rtl || !1;
-  this.cache = (b = a.cache || null) && new Q(b);
+  this.cache = (b = a.cache || null) && new V(b);
 }
-t = S.prototype;
+t = D.prototype;
 t.clear = function() {
   this.map.clear();
   this.ctx.clear();
@@ -897,7 +1010,7 @@ t.cleanup = function() {
 };
 t.searchCache = function(a, c, b) {
   a = ("object" === typeof a ? "" + a.query : a).toLowerCase();
-  this.cache || (this.cache = new Q());
+  this.cache || (this.cache = new V());
   let d = this.cache.get(a);
   if (!d) {
     d = this.search(a, c, b);
@@ -912,6 +1025,6 @@ t.searchCache = function(a, c, b) {
   }
   return d;
 };
-export default {Index:S, Charset:null, Encoder:D, Document:null, Worker:null, Resolver:null, IndexedDB:null, Language:{}};
+export default {Index:D, Charset:null, Encoder:y, Document:null, Worker:null, Resolver:null, IndexedDB:null, Language:{}};
 
-export const Index=S;export const  Charset=null;export const  Encoder=D;export const  Document=null;export const  Worker=null;export const  Resolver=null;export const  IndexedDB=null;export const  Language={};
\ No newline at end of file
+export const Index=D;export const  Charset=null;export const  Encoder=y;export const  Document=null;export const  Worker=null;export const  Resolver=null;export const  IndexedDB=null;export const  Language={};
\ No newline at end of file
diff --git a/dist/flexsearch.light.module.min.js b/dist/flexsearch.light.module.min.js
index 39dbe84..acae027 100644
--- a/dist/flexsearch.light.module.min.js
+++ b/dist/flexsearch.light.module.min.js
@@ -1,35 +1,41 @@
 /**!
- * FlexSearch.js v0.8.107 (Bundle)
+ * FlexSearch.js v0.8.108 (Bundle)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
  * https://github.com/nextapps-de/flexsearch
  */
 var t;function u(a,c,b){const d=typeof b,e=typeof a;if("undefined"!==d){if("undefined"!==e){if(b){if("function"===e&&d===e)return function(h){return a(b(h))};c=a.constructor;if(c===b.constructor){if(c===Array)return b.concat(a);if(c===Map){var g=new Map(b);for(var f of a)g.set(f[0],f[1]);return g}if(c===Set){f=new Set(b);for(g of a.values())f.add(g);return f}}}return a}return b}return"undefined"===e?c:a}function w(){return Object.create(null)}
-function x(a){let c=0;for(let b=0,d;b<a.length;b++)(d=a[b])&&c<d.length&&(c=d.length);return c};const y=/[^\p{L}\p{N}]+/u,z=/(\d{3})/g,B=/(\D)(\d{3})/g,C=/(\d{3})(\D)/g,D="".normalize&&/[\u0300-\u036f]/g;function E(a){if(!this||this.constructor!==E)return new E(...arguments);for(let c=0;c<arguments.length;c++)this.assign(arguments[c])}t=E.prototype;
+function aa(a){let c=0;for(let b=0,d;b<a.length;b++)(d=a[b])&&c<d.length&&(c=d.length);return c};const ba=/[^\p{L}\p{N}]+/u,ca=/(\d{3})/g,da=/(\D)(\d{3})/g,ea=/(\d{3})(\D)/g,x="".normalize&&/[\u0300-\u036f]/g;function y(a){if(!this||this.constructor!==y)return new y(...arguments);for(let c=0;c<arguments.length;c++)this.assign(arguments[c])}t=y.prototype;
 t.assign=function(a){this.normalize=u(a.normalize,!0,this.normalize);let c=a.include,b=c||a.exclude||a.split,d;if(b||""===b){if("object"===typeof b&&b.constructor!==RegExp){let e="";d=!c;c||(e+="\\p{Z}");b.letter&&(e+="\\p{L}");b.number&&(e+="\\p{N}",d=!!c);b.symbol&&(e+="\\p{S}");b.punctuation&&(e+="\\p{P}");b.control&&(e+="\\p{C}");if(b=b.char)e+="object"===typeof b?b.join(""):b;try{this.split=new RegExp("["+(c?"^":"")+e+"]+","u")}catch(g){this.split=/\s+/}}else this.split=b,d=!1===b||2>"a1a".split(b).length;
-this.numeric=u(a.numeric,d)}else{try{this.split=u(this.split,y)}catch(e){this.split=/\s+/}this.numeric=u(a.numeric,u(this.numeric,!0))}this.prepare=u(a.prepare,null,this.prepare);this.finalize=u(a.finalize,null,this.finalize);this.rtl=u(a.rtl,!1,this.rtl);this.dedupe=u(a.dedupe,!1,this.dedupe);this.filter=u((b=a.filter)&&new Set(b),null,this.filter);this.matcher=u((b=a.matcher)&&new Map(b),null,this.matcher);this.mapper=u((b=a.mapper)&&new Map(b),null,this.mapper);this.stemmer=u((b=a.stemmer)&&new Map(b),
+this.numeric=u(a.numeric,d)}else{try{this.split=u(this.split,ba)}catch(e){this.split=/\s+/}this.numeric=u(a.numeric,u(this.numeric,!0))}this.prepare=u(a.prepare,null,this.prepare);this.finalize=u(a.finalize,null,this.finalize);this.rtl=u(a.rtl,!1,this.rtl);this.dedupe=u(a.dedupe,!1,this.dedupe);this.filter=u((b=a.filter)&&new Set(b),null,this.filter);this.matcher=u((b=a.matcher)&&new Map(b),null,this.matcher);this.mapper=u((b=a.mapper)&&new Map(b),null,this.mapper);this.stemmer=u((b=a.stemmer)&&new Map(b),
 null,this.stemmer);this.replacer=u(a.replacer,null,this.replacer);this.minlength=u(a.minlength,1,this.minlength);this.maxlength=u(a.maxlength,0,this.maxlength);if(this.cache=b=u(a.cache,!0,this.cache))this.l=null,this.C="number"===typeof b?b:2E5,this.i=new Map,this.j=new Map,this.s=this.o=128;this.g="";this.v=null;this.h="";this.A=null;if(this.matcher)for(const e of this.matcher.keys())this.g+=(this.g?"|":"")+e;if(this.stemmer)for(const e of this.stemmer.keys())this.h+=(this.h?"|":"")+e;return this};
-t.addStemmer=function(a,c){this.stemmer||(this.stemmer=new Map);this.stemmer.set(a,c);this.h+=(this.h?"|":"")+a;this.A=null;this.cache&&F(this);return this};t.addFilter=function(a){this.filter||(this.filter=new Set);this.filter.add(a);this.cache&&F(this);return this};t.addMapper=function(a,c){if("object"===typeof a)return this.addReplacer(a,c);if(1<a.length)return this.addMatcher(a,c);this.mapper||(this.mapper=new Map);this.mapper.set(a,c);this.cache&&F(this);return this};
-t.addMatcher=function(a,c){if("object"===typeof a)return this.addReplacer(a,c);if(2>a.length&&(this.dedupe||this.mapper))return this.addMapper(a,c);this.matcher||(this.matcher=new Map);this.matcher.set(a,c);this.g+=(this.g?"|":"")+a;this.v=null;this.cache&&F(this);return this};t.addReplacer=function(a,c){if("string"===typeof a)return this.addMatcher(a,c);this.replacer||(this.replacer=[]);this.replacer.push(a,c);this.cache&&F(this);return this};
-t.encode=function(a){if(this.cache&&a.length<=this.o)if(this.l){if(this.i.has(a))return this.i.get(a)}else this.l=setTimeout(F,50,this);this.normalize&&("function"===typeof this.normalize?a=this.normalize(a):a=D?a.normalize("NFKD").replace(D,"").toLowerCase():a.toLowerCase());this.prepare&&(a=this.prepare(a));this.numeric&&3<a.length&&(a=a.replace(B,"$1 $2").replace(C,"$1 $2").replace(z,"$1 "));const c=!(this.dedupe||this.mapper||this.filter||this.matcher||this.stemmer||this.replacer);let b=[],d=
-this.split||""===this.split?a.split(this.split):a;for(let g=0,f,h;g<d.length;g++)if((f=h=d[g])&&!(f.length<this.minlength))if(c)b.push(f);else if(!this.filter||!this.filter.has(f)){if(this.cache&&f.length<=this.s)if(this.l){var e=this.j.get(f);if(e||""===e){e&&b.push(e);continue}}else this.l=setTimeout(F,50,this);this.stemmer&&2<f.length&&(this.A||(this.A=new RegExp("(?!^)("+this.h+")$")),f=f.replace(this.A,k=>this.stemmer.get(k)),f.length<this.minlength||this.filter&&this.filter.has(f))&&(f="");
+t.addStemmer=function(a,c){this.stemmer||(this.stemmer=new Map);this.stemmer.set(a,c);this.h+=(this.h?"|":"")+a;this.A=null;this.cache&&z(this);return this};t.addFilter=function(a){this.filter||(this.filter=new Set);this.filter.add(a);this.cache&&z(this);return this};t.addMapper=function(a,c){if("object"===typeof a)return this.addReplacer(a,c);if(1<a.length)return this.addMatcher(a,c);this.mapper||(this.mapper=new Map);this.mapper.set(a,c);this.cache&&z(this);return this};
+t.addMatcher=function(a,c){if("object"===typeof a)return this.addReplacer(a,c);if(2>a.length&&(this.dedupe||this.mapper))return this.addMapper(a,c);this.matcher||(this.matcher=new Map);this.matcher.set(a,c);this.g+=(this.g?"|":"")+a;this.v=null;this.cache&&z(this);return this};t.addReplacer=function(a,c){if("string"===typeof a)return this.addMatcher(a,c);this.replacer||(this.replacer=[]);this.replacer.push(a,c);this.cache&&z(this);return this};
+t.encode=function(a){if(this.cache&&a.length<=this.o)if(this.l){if(this.i.has(a))return this.i.get(a)}else this.l=setTimeout(z,50,this);this.normalize&&("function"===typeof this.normalize?a=this.normalize(a):a=x?a.normalize("NFKD").replace(x,"").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,"$1 "));const c=!(this.dedupe||this.mapper||this.filter||this.matcher||this.stemmer||this.replacer);let b=[],
+d=this.split||""===this.split?a.split(this.split):a;for(let g=0,f,h;g<d.length;g++)if((f=h=d[g])&&!(f.length<this.minlength))if(c)b.push(f);else if(!this.filter||!this.filter.has(f)){if(this.cache&&f.length<=this.s)if(this.l){var e=this.j.get(f);if(e||""===e){e&&b.push(e);continue}}else this.l=setTimeout(z,50,this);this.stemmer&&2<f.length&&(this.A||(this.A=new RegExp("(?!^)("+this.h+")$")),f=f.replace(this.A,k=>this.stemmer.get(k)),f.length<this.minlength||this.filter&&this.filter.has(f))&&(f="");
 if(f&&(this.mapper||this.dedupe&&1<f.length)){e="";for(let k=0,l="",n,m;k<f.length;k++)n=f.charAt(k),n===l&&this.dedupe||((m=this.mapper&&this.mapper.get(n))||""===m?m===l&&this.dedupe||!(l=m)||(e+=m):e+=l=n);f=e}this.matcher&&1<f.length&&(this.v||(this.v=new RegExp("("+this.g+")","g")),f=f.replace(this.v,k=>this.matcher.get(k)));if(f&&this.replacer)for(e=0;f&&e<this.replacer.length;e+=2)f=f.replace(this.replacer[e],this.replacer[e+1]);this.cache&&h.length<=this.s&&(this.j.set(h,f),this.j.size>this.C&&
-(this.j.clear(),this.s=this.s/1.1|0));f&&b.push(f)}this.finalize&&(b=this.finalize(b)||b);this.cache&&a.length<=this.o&&(this.i.set(a,b),this.i.size>this.C&&(this.i.clear(),this.o=this.o/1.1|0));return b};function F(a){a.l=null;a.i.clear();a.j.clear()};function G(a,c,b,d,e){const g=a.length;let f=[],h,k;h=w();for(let l=0,n,m,r,q;l<c;l++)for(let p=0;p<g;p++)if(r=a[p],l<r.length&&(n=r[l]))for(let v=0;v<n.length;v++)m=n[v],(k=h[m])?h[m]++:(k=0,h[m]=1),q=f[k]||(f[k]=[]),q.push(m);if(a=f.length)if(e)f=1<f.length?I(f,b,d):(f=f[0]).length>b||d?f.slice(d,b+d):f;else{if(a<g)return[];f=f[a-1];if(b||d)if(f.length>b||d)f=f.slice(d,b+d)}return f}
-function I(a,c,b){const d=[],e=w();let g;var f=a.length;let h;for(let k=f-1;0<=k;k--)if(h=(f=a[k])&&f.length)for(let l=0;l<h;l++)if(g=f[l],!e[g])if(e[g]=1,b)b--;else if(d.push(g),d.length===c)return d;return d};function J(a,c,b,d){if(!a.length)return a;if(1===a.length)return a=a[0],a=b||a.length>c?c?a.slice(b,b+c):a.slice(b):a,d?K.call(this,a):a;let e=[];for(let g=0,f,h;g<a.length;g++)if((f=a[g])&&(h=f.length)){if(b){if(b>=h){b-=h;continue}b<h&&(f=c?f.slice(b,b+c):f.slice(b),h=f.length,b=0)}h>c&&(f=f.slice(0,c),h=c);if(!e.length&&h>=c)return d?K.call(this,f):f;e.push(f);c-=h;if(!c)break}e=1<e.length?[].concat.apply([],e):e[0];return d?K.call(this,e):e};function L(a,c,b){var d=b[0];if(d.then)return Promise.all(b).then(function(n){return a[c].apply(a,n)});if(d[0]&&d[0].index)return a[c].apply(a,d);d=[];let e=[],g=0,f=0,h,k,l;for(let n=0,m;n<b.length;n++)if(m=b[n]){let r;if(m.constructor===M)r=m.result;else if(m.constructor===Array)r=m;else if(g=m.limit||0,f=m.offset||0,l=m.suggest,k=m.resolve,h=m.enrich&&k,m.index)m.resolve=!1,r=m.index.search(m).result,m.resolve=k;else if(m.and)r=a.and(m.and);else if(m.or)r=a.or(m.or);else if(m.xor)r=a.xor(m.xor);
-else if(m.not)r=a.not(m.not);else continue;if(r.then)e.push(r);else if(r.length)d[n]=r;else if(!l&&("and"===c||"xor"===c)){d=[];break}}return{m:d,u:e,limit:g,offset:f,enrich:h,resolve:k,suggest:l}};M.prototype.or=function(){const {m:a,u:c,limit:b,offset:d,enrich:e,resolve:g}=L(this,"or",arguments);return N.call(this,a,c,b,d,e,g)};function N(a,c,b,d,e,g){if(c.length){const f=this;return Promise.all(c).then(function(h){a=[];for(let k=0,l;k<h.length;k++)(l=h[k]).length&&(a[k]=l);return N.call(f,a,[],b,d,e,g)})}a.length&&(this.result.length&&a.push(this.result),2>a.length?this.result=a[0]:(this.result=I(a,b,d),d=0));return g?this.resolve(b,d,e):this};M.prototype.and=function(){let a=this.result.length,c,b,d,e;if(!a){const g=arguments[0];g&&(a=!!g.suggest,e=g.resolve,c=g.limit,b=g.offset,d=g.enrich&&e)}if(a){const {m:g,u:f,limit:h,offset:k,enrich:l,resolve:n,suggest:m}=L(this,"and",arguments);return O.call(this,g,f,h,k,l,n,m)}return e?this.resolve(c,b,d):this};
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+function ma(a,c,b,d,e){const g=[],f=w();let h=0;for(let k=0,l;k<a.length;k++)if(l=a[k]){h<l.length&&(h=l.length);for(let n=0,m;n<l.length;n++)if(m=l[n])for(let r=0,q;r<m.length;r++)q=m[r],f[q]=f[q]?2:1}for(let k=0,l,n=0;k<h;k++)for(let m=0,r;m<a.length;m++)if(r=a[m])if(l=r[k])for(let q=0,p;q<l.length;q++)if(p=l[q],1===f[p])if(b)b--;else if(d){if(g.push(p),g.length===c)return g}else{const v=k+(m?e:0);g[v]||(g[v]=[]);g[v].push(p);if(++n===c)return g}return g};T.prototype.not=function(){const {m:a,u:c,limit:b,offset:d,enrich:e,resolve:g,suggest:f}=S(this,"not",arguments);return na.call(this,a,c,b,d,e,g,f)};function na(a,c,b,d,e,g,f){if(c.length){const h=this;return Promise.all(c).then(function(k){a=[];for(let l=0,n;l<k.length;l++)(n=k[l]).length&&(a[l]=n);return na.call(h,a,[],b,d,e,g,f)})}if(a.length&&this.result.length)this.result=oa.call(this,a,b,d,g);else if(g)return this.resolve(b,d,e);return g?e?Q.call(this.index,this.result):this.result:this}
+function oa(a,c,b,d){const e=[];a=new Set(a.flat().flat());for(let g=0,f,h=0;g<this.result.length;g++)if(f=this.result[g])for(let k=0,l;k<f.length;k++)if(l=f[k],!a.has(l))if(b)b--;else if(d){if(e.push(l),e.length===c)return e}else if(e[g]||(e[g]=[]),e[g].push(l),++h===c)return e;return e};function T(a){if(!this||this.constructor!==T)return new T(a);if(a&&a.index)return a.resolve=!1,this.index=a.index,this.g=a.boost||0,this.result=a.index.search(a).result,this;this.index=null;this.result=a||[];this.g=0}T.prototype.limit=function(a){if(this.result.length){const c=[];for(let b=0,d;b<this.result.length;b++)if(d=this.result[b])if(d.length<=a){if(c[b]=d,a-=d.length,!a)break}else{c[b]=d.slice(0,a);break}this.result=c}return this};
+T.prototype.offset=function(a){if(this.result.length){const c=[];for(let b=0,d;b<this.result.length;b++)if(d=this.result[b])d.length<=a?a-=d.length:(c[b]=d.slice(a),a=0);this.result=c}return this};T.prototype.boost=function(a){this.g+=a;return this};T.prototype.resolve=function(a,c,b){const d=this.result,e=this.index;this.result=this.index=null;return d.length?("object"===typeof a&&(b=a.enrich,c=a.offset,a=a.limit),P.call(e,d,a||100,c,b)):d};w();function Q(a){if(!this||!this.store)return a;const c=Array(a.length);for(let b=0,d;b<a.length;b++)d=a[b],c[b]={id:d,doc:this.store.get(d)};return c};function V(a){this.limit=a&&!0!==a?a:1E3;this.cache=new Map;this.g=""}V.prototype.set=function(a,c){this.cache.set(this.g=a,c);this.cache.size>this.limit&&this.cache.delete(this.cache.keys().next().value)};V.prototype.get=function(a){const c=this.cache.get(a);c&&this.g!==a&&(this.cache.delete(a),this.cache.set(this.g=a,c));return c};V.prototype.remove=function(a){for(const c of this.cache){const b=c[0];c[1].includes(a)&&this.cache.delete(b)}};
+V.prototype.clear=function(){this.cache.clear();this.g=""};const pa={normalize:function(a){return a.toLowerCase()}};const qa={memory:{resolution:1},performance:{resolution:6,fastupdate:!0,context:{depth:1,resolution:3}},match:{tokenize:"forward"},score:{resolution:9,context:{depth:2,resolution:9}}};D.prototype.add=function(a,c,b,d){if(c&&(a||0===a)){if(!d&&!b&&this.reg.has(a))return this.update(a,c);c=this.encoder.encode(c);if(d=c.length){const l=w(),n=w(),m=this.depth,r=this.resolution;for(let q=0;q<d;q++){let p=c[this.rtl?d-1-q:q];var e=p.length;if(e&&(m||!n[p])){var g=this.score?this.score(c,p,q,null,0):W(r,d,q),f="";switch(this.tokenize){case "full":if(2<e){for(g=0;g<e;g++)for(var h=e;h>g;h--){f=p.substring(g,h);var k=this.score?this.score(c,p,q,f,g):W(r,d,q,e,g);X(this,n,f,k,a,b)}break}case "reverse":if(1<
+e){for(h=e-1;0<h;h--)f=p[h]+f,k=this.score?this.score(c,p,q,f,h):W(r,d,q,e,h),X(this,n,f,k,a,b);f=""}case "forward":if(1<e){for(h=0;h<e;h++)f+=p[h],X(this,n,f,g,a,b);break}default:if(X(this,n,p,g,a,b),m&&1<d&&q<d-1)for(e=w(),f=this.B,g=p,h=Math.min(m+1,d-q),e[g]=1,k=1;k<h;k++)if((p=c[this.rtl?d-1-q-k:q+k])&&!e[p]){e[p]=1;const v=this.score?this.score(c,g,q,p,k):W(f+(d/2>f?0:1),d,q,h-1,k-1),B=this.bidirectional&&p>g;X(this,l,B?g:p,v,a,b,B?p:g)}}}}this.fastupdate||this.reg.add(a)}}return this};
+function X(a,c,b,d,e,g,f){let h=f?a.ctx:a.map,k;if(!c[b]||f&&!(k=c[b])[f])f?(c=k||(c[b]=w()),c[f]=1,(k=h.get(f))?h=k:h.set(f,h=new Map)):c[b]=1,(k=h.get(b))?h=k:h.set(b,h=[]),h=h[d]||(h[d]=[]),g&&h.includes(e)||(h.push(e),a.fastupdate&&((c=a.reg.get(e))?c.push(h):a.reg.set(e,[h])))}function W(a,c,b,d,e){return b&&1<a?c+(d||0)<=a?b+(e||0):(a-1)/(c+(d||0))*(b+(e||0))+1|0:0};D.prototype.search=function(a,c,b){b||(c||"object"!==typeof a?"object"===typeof c&&(b=c,c=0):(b=a,a=""));var d=[],e=0;if(b){a=b.query||a;c=b.limit||c;e=b.offset||0;var g=b.context;var f=b.suggest;var h=!0;var k=b.resolution}else h=!0;b=this.encoder.encode(a);a=b.length;c=c||(h?100:0);if(1===a)return ra.call(this,b[0],"",c,e,h);g=this.depth&&!1!==g;if(2===a&&g&&!f)return ra.call(this,b[0],b[1],c,e,h);h=w();let l=0;if(1<a&&g){var n=b[0];l=1}k||0===k||(k=n?this.B:this.resolution);for(let p,v;l<a;l++){if((v=
+b[l])&&!h[v]){h[v]=1;p=sa(this,v,n);a:{g=p;var m=d,r=f,q=k;let B=[];if(g&&g.length){if(g.length<=q){m.push(g);p=void 0;break a}for(let R=0,fa;R<q;R++)if(fa=g[R])B[R]=fa;if(B.length){m.push(B);p=void 0;break a}}p=r?void 0:B}if(p){d=p;break}n&&(f&&p&&d.length||(n=v))}f&&n&&l===a-1&&!d.length&&(n="",l=-1,h=w())}a:{n=d.length;a=d;if(1<n)a=N(d,k,c,e,f);else if(1===n){f=P.call(null,d[0],c,e);break a}f=a}return f};
+function ra(a,c,b,d,e){a=sa(this,a,c);e=!0;return a&&a.length?e?P.call(this,a,b,d):new T(a):e?[]:new T}function sa(a,c,b){let d;b&&(d=a.bidirectional&&c>b)&&(d=b,b=c,c=d);a=b?(a=a.ctx.get(b))&&a.get(c):a.map.get(c);return a};D.prototype.remove=function(a,c){const b=this.reg.size&&(this.fastupdate?this.reg.get(a):this.reg.has(a));if(b){if(this.fastupdate)for(let d=0,e;d<b.length;d++){if(e=b[d])if(2>e.length)e.pop();else{const g=e.indexOf(a);g===b.length-1?e.pop():e.splice(g,1)}}else Y(this.map,a),this.depth&&Y(this.ctx,a);c||this.reg.delete(a)}this.cache&&this.cache.remove(a);return this};
+function Y(a,c){let b=0;if(a.constructor===Array)for(let d=0,e,g;d<a.length;d++){if((e=a[d])&&e.length)if(g=e.indexOf(c),0<=g){1<e.length?(e.splice(g,1),b++):delete a[d];break}else b++}else for(let d of a.entries()){const e=d[0],g=Y(d[1],c);g?b+=g:a.delete(e)}return b};function D(a,c){if(!this||this.constructor!==D)return new D(a);if(a){var b="string"===typeof a?a:a.preset;b&&(a=Object.assign({},qa[b],a))}else a={};b=a.context;const d=!0===b?{depth:1}:b||{},e=a.encode||a.encoder||pa;this.encoder=e.encode?e:"object"===typeof e?new y(e):{encode:e};this.resolution=a.resolution||9;this.tokenize=b=a.tokenize||"strict";this.depth="strict"===b&&d.depth||0;this.bidirectional=!1!==d.bidirectional;this.fastupdate=!!a.fastupdate;this.score=a.score||null;b=!1;this.map=new Map;
+this.ctx=new Map;this.reg=c||(this.fastupdate?new Map:new Set);this.B=d.resolution||3;this.rtl=e.rtl||a.rtl||!1;this.cache=(b=a.cache||null)&&new V(b)}t=D.prototype;t.clear=function(){this.map.clear();this.ctx.clear();this.reg.clear();this.cache&&this.cache.clear();return this};t.append=function(a,c){return this.add(a,c,!0)};t.contain=function(a){return this.reg.has(a)};t.update=function(a,c){const b=this,d=this.remove(a);return d&&d.then?d.then(()=>b.add(a,c)):this.add(a,c)};
 function Z(a){let c=0;if(a.constructor===Array)for(let b=0,d;b<a.length;b++)(d=a[b])&&(c+=d.length);else for(const b of a){const d=b[0],e=Z(b[1]);e?c+=e:a.delete(d)}return c}t.cleanup=function(){if(!this.fastupdate)return this;Z(this.map);this.depth&&Z(this.ctx);return this};
-t.searchCache=function(a,c,b){a=("object"===typeof a?""+a.query:a).toLowerCase();this.cache||(this.cache=new R);let d=this.cache.get(a);if(!d){d=this.search(a,c,b);if(d.then){const e=this;d.then(function(g){e.cache.set(a,g);return g})}this.cache.set(a,d)}return d};export default {Index:S,Charset:null,Encoder:E,Document:null,Worker:null,Resolver:null,IndexedDB:null,Language:{}};
-export const Index=S;export const Charset=null;export const Encoder=E;export const Document=null;export const Worker=null;export const Resolver=null;export const IndexedDB=null;export const Language={};
\ No newline at end of file
+t.searchCache=function(a,c,b){a=("object"===typeof a?""+a.query:a).toLowerCase();this.cache||(this.cache=new V);let d=this.cache.get(a);if(!d){d=this.search(a,c,b);if(d.then){const e=this;d.then(function(g){e.cache.set(a,g);return g})}this.cache.set(a,d)}return d};export default {Index:D,Charset:null,Encoder:y,Document:null,Worker:null,Resolver:null,IndexedDB:null,Language:{}};
+export const Index=D;export const Charset=null;export const Encoder=y;export const Document=null;export const Worker=null;export const Resolver=null;export const IndexedDB=null;export const Language={};
\ No newline at end of file
diff --git a/dist/module-debug/bundle.js b/dist/module-debug/bundle.js
index 318ee70..fa3752c 100644
--- a/dist/module-debug/bundle.js
+++ b/dist/module-debug/bundle.js
@@ -276,7 +276,7 @@ const FlexSearch = {
 
     FlexSearch.Language = {};
 
-    const root = self;
+    const root = "undefined" != typeof self ? self : "undefined" != typeof global ? global : "undefined" != typeof window ? window : {};
     let prop;
 
     // AMD (RequireJS)
diff --git a/dist/module-debug/worker.js b/dist/module-debug/worker.js
index fa1feac..2fc99f1 100644
--- a/dist/module-debug/worker.js
+++ b/dist/module-debug/worker.js
@@ -1,6 +1,7 @@
 import { IndexOptions } from "./type.js";
 import { create_object, is_function, is_object, is_string } from "./common.js";
 import handler from "./worker/handler.js";
+import apply_async from "./async.js";
 
 let pid = 0;
 
@@ -90,10 +91,16 @@ register("append");
 register("search");
 register("update");
 register("remove");
+register("clear");
+register("export");
+register("import");
+
+apply_async(WorkerIndex.prototype);
 
 function register(key) {
 
-    WorkerIndex.prototype[key] = WorkerIndex.prototype[key + "Async"] = async function () {
+    WorkerIndex.prototype[key] =
+    /*WorkerIndex.prototype[key + "Async"] =*/async function () {
         const self = this,
               args = [].slice.call(arguments),
               arg = args[args.length - 1];
diff --git a/dist/module-debug/worker/handler.js b/dist/module-debug/worker/handler.js
index 4b77dc7..990e152 100644
--- a/dist/module-debug/worker/handler.js
+++ b/dist/module-debug/worker/handler.js
@@ -1,24 +1,25 @@
 import Index from "../index.js";
 import { IndexOptions } from "../type.js";
 
+/** @type Index */
+let index, options;
+/** @type {IndexOptions} */
+
 export default (async function (data) {
 
     data = data.data;
 
-    /** @type Index */
-    const index = self._index,
-          args = data.args,
-          task = data.task;
+    const task = data.task,
+          id = data.id;
 
+    let args = data.args;
 
     switch (task) {
 
         case "init":
 
-            /** @type {IndexOptions} */
-            let options = data.options || {},
-                filepath = options.config;
-
+            options = data.options || {};
+            let filepath = options.config;
             if (filepath) {
                 options = options;
                 // will be replaced after build with the line below because
@@ -33,22 +34,31 @@ export default (async function (data) {
                 // export the FlexSearch global payload to "self"
                 Function("return " + factory)()(self);
 
-                /** @type Index */
-                self._index = new self.FlexSearch.Index(options);
+                index = new self.FlexSearch.Index(options);
 
                 // destroy the exported payload
                 delete self.FlexSearch;
             } else {
 
-                self._index = new Index(options);
+                index = new Index(options);
             }
 
-            postMessage({ id: data.id });
+            postMessage({ id: id });
             break;
 
         default:
-            const id = data.id,
-                  message = index[task].apply(index, args);
+
+            let message;
+
+            if ("export" === task) {
+                args = [options.export];
+            }
+            if ("import" === task) {
+                await options.import.call(index, index);
+                //args = [options.import];
+            } else {
+                message = index[task].apply(index, args);
+            }
 
             postMessage("search" === task ? { id: id, msg: message } : { id: id });
     }
diff --git a/dist/module-debug/worker/node.js b/dist/module-debug/worker/node.js
index 48f0621..9d154eb 100644
--- a/dist/module-debug/worker/node.js
+++ b/dist/module-debug/worker/node.js
@@ -1,27 +1,27 @@
 const { parentPort } = require("worker_threads"),
-      { join } = require("path"),
-      { Index } = require("../flexsearch.bundle.min.js");
+      { Index } = require("flexsearch");
+//const { join } = require("path");
 // Test Path
 //const { Index } = require("../../dist/flexsearch.bundle.min.js");
 
 
-let index;
+/** @type Index */
+let index, options;
+/** @type {IndexOptions} */
 
 parentPort.on("message", async function (data) {
-
-    /** @type Index */
-    const args = data.args,
-          task = data.task,
+    const task = data.task,
           id = data.id;
 
+    let args = data.args;
 
     switch (task) {
 
         case "init":
-            let options = data.options || {},
-                filepath = options.config;
-            // load extern field configuration
 
+            options = data.options || {};
+            // load extern field configuration
+            let filepath = options.config;
             if (filepath) {
                 options = Object.assign({}, options, require(filepath));
                 delete options.worker;
@@ -35,7 +35,18 @@ parentPort.on("message", async function (data) {
 
         default:
 
-            const message = index[task].apply(index, args);
+            let message;
+
+            if ("export" === task) {
+                args = [options.export];
+            }
+            if ("import" === task) {
+                await options.import.call(index, index);
+                //args = [options.import];
+            } else {
+                message = index[task].apply(index, args);
+            }
+
             parentPort.postMessage("search" === task ? { id: id, msg: message } : { id: id });
     }
 });
\ No newline at end of file
diff --git a/dist/module-min/bundle.js b/dist/module-min/bundle.js
index 552302e..c8ecace 100644
--- a/dist/module-min/bundle.js
+++ b/dist/module-min/bundle.js
@@ -1 +1 @@
-import{SearchOptions,ContextOptions,DocumentDescriptor,DocumentSearchOptions,FieldOptions,IndexOptions,DocumentOptions,TagOptions,StoreOptions,EncoderOptions,EncoderSplitOptions,PersistentOptions,ResolverOptions}from"./type.js";import StorageInterface from"./db/interface.js";import Document from"./document.js";import Index from"./index.js";import WorkerIndex from"./worker.js";import Resolver from"./resolver.js";import Encoder from"./encoder.js";import IdxDB from"./db/indexeddb/index.js";import Charset from"./charset.js";Index.prototype.add,Index.prototype.append,Index.prototype.search,Index.prototype.update,Index.prototype.remove,Index.prototype.contain,Index.prototype.clear,Index.prototype.cleanup,Index.prototype.searchCache,Index.prototype.addAsync,Index.prototype.appendAsync,Index.prototype.searchAsync,Index.prototype.updateAsync,Index.prototype.removeAsync,Index.prototype.export,Index.prototype.import,Index.prototype.serialize,Index.prototype.mount,Index.prototype.commit,Index.prototype.destroy,Index.prototype.reg,Index.prototype.map,Index.prototype.ctx,Index.prototype.db,Index.prototype.tag,Index.prototype.store,Index.prototype.depth,Index.prototype.bidirectional,Index.prototype.commit_task,Index.prototype.commit_timer,Index.prototype.cache,Index.prototype.bypass,Index.prototype.document,Index.prototype.encoder,Encoder.prototype.assign,Encoder.prototype.encode,Encoder.prototype.addMatcher,Encoder.prototype.addStemmer,Encoder.prototype.addFilter,Encoder.prototype.addMapper,Encoder.prototype.addReplacer,Document.prototype.add,Document.prototype.append,Document.prototype.search,Document.prototype.update,Document.prototype.remove,Document.prototype.contain,Document.prototype.clear,Document.prototype.cleanup,Document.prototype.addAsync,Document.prototype.appendAsync,Document.prototype.searchAsync,Document.prototype.updateAsync,Document.prototype.removeAsync,Document.prototype.mount,Document.prototype.commit,Document.prototype.destroy,Document.prototype.export,Document.prototype.import,Document.prototype.searchCache,Document.prototype.get,Document.prototype.set,Document.prototype.field,Document.prototype.index,Document.prototype.reg,Document.prototype.tag,Document.prototype.store,Document.prototype.fastupdate,Resolver.prototype.limit,Resolver.prototype.offset,Resolver.prototype.boost,Resolver.prototype.resolve,Resolver.prototype.or,Resolver.prototype.and,Resolver.prototype.xor,Resolver.prototype.not,Resolver.prototype.result,StorageInterface.db,StorageInterface.id,StorageInterface.support_tag_search,StorageInterface.fastupdate,StorageInterface.prototype.mount,StorageInterface.prototype.open,StorageInterface.prototype.close,StorageInterface.prototype.destroy,StorageInterface.prototype.clear,StorageInterface.prototype.get,StorageInterface.prototype.tag,StorageInterface.prototype.enrich,StorageInterface.prototype.has,StorageInterface.prototype.search,StorageInterface.prototype.info,StorageInterface.prototype.commit,StorageInterface.prototype.remove,Charset.LatinExact,Charset.LatinDefault,Charset.LatinSimple,Charset.LatinBalance,Charset.LatinAdvanced,Charset.LatinExtra,Charset.LatinSoundex,Charset.ArabicDefault,Charset.CjkDefault,Charset.CyrillicDefault,IndexOptions.preset,IndexOptions.context,IndexOptions.encoder,IndexOptions.encode,IndexOptions.resolution,IndexOptions.tokenize,IndexOptions.fastupdate,IndexOptions.score,IndexOptions.keystore,IndexOptions.rtl,IndexOptions.cache,IndexOptions.resolve,IndexOptions.db,IndexOptions.worker,IndexOptions.config,IndexOptions.priority,FieldOptions.preset,FieldOptions.context,FieldOptions.encoder,FieldOptions.encode,FieldOptions.resolution,FieldOptions.tokenize,FieldOptions.fastupdate,FieldOptions.score,FieldOptions.keystore,FieldOptions.rtl,FieldOptions.cache,FieldOptions.db,FieldOptions.config,FieldOptions.resolve,FieldOptions.field,FieldOptions.filter,FieldOptions.custom,FieldOptions.worker,DocumentOptions.context,DocumentOptions.encoder,DocumentOptions.encode,DocumentOptions.resolution,DocumentOptions.tokenize,DocumentOptions.fastupdate,DocumentOptions.score,DocumentOptions.keystore,DocumentOptions.rtl,DocumentOptions.cache,DocumentOptions.db,DocumentOptions.doc,DocumentOptions.document,DocumentOptions.worker,DocumentOptions.priority,ContextOptions.depth,ContextOptions.bidirectional,ContextOptions.resolution,DocumentDescriptor.field,DocumentDescriptor.index,DocumentDescriptor.tag,DocumentDescriptor.store,TagOptions.field,TagOptions.tag,TagOptions.filter,TagOptions.custom,TagOptions.keystore,TagOptions.db,TagOptions.config,StoreOptions.field,StoreOptions.filter,StoreOptions.custom,StoreOptions.config,SearchOptions.query,SearchOptions.limit,SearchOptions.offset,SearchOptions.context,SearchOptions.suggest,SearchOptions.resolve,SearchOptions.enrich,SearchOptions.resolution,DocumentSearchOptions.query,DocumentSearchOptions.limit,DocumentSearchOptions.offset,DocumentSearchOptions.context,DocumentSearchOptions.suggest,DocumentSearchOptions.enrich,DocumentSearchOptions.tag,DocumentSearchOptions.field,DocumentSearchOptions.index,DocumentSearchOptions.pluck,DocumentSearchOptions.merge,DocumentSearchOptions.highlight,EncoderOptions.rtl,EncoderOptions.dedupe,EncoderOptions.split,EncoderOptions.include,EncoderOptions.exclude,EncoderOptions.prepare,EncoderOptions.finalize,EncoderOptions.filter,EncoderOptions.matcher,EncoderOptions.mapper,EncoderOptions.stemmer,EncoderOptions.replacer,EncoderOptions.minlength,EncoderOptions.maxlength,EncoderOptions.cache,EncoderSplitOptions.letter,EncoderSplitOptions.number,EncoderSplitOptions.symbol,EncoderSplitOptions.punctuation,EncoderSplitOptions.control,EncoderSplitOptions.char,PersistentOptions.name,PersistentOptions.field,PersistentOptions.type,PersistentOptions.db,ResolverOptions.index,ResolverOptions.query,ResolverOptions.limit,ResolverOptions.offset,ResolverOptions.enrich,ResolverOptions.resolve,ResolverOptions.suggest,ResolverOptions.and,ResolverOptions.or,ResolverOptions.xor,ResolverOptions.not;const FlexSearch={Index:Index,Charset:Charset,Encoder:Encoder,Document:Document,Worker:WorkerIndex,Resolver:Resolver,IndexedDB:IdxDB,Language:{}};{FlexSearch.Language={};const a=self;let b;(b=a.define)&&b.amd?b([],function(){return FlexSearch}):"object"==typeof a.exports?a.exports=FlexSearch:a.FlexSearch=FlexSearch}export default FlexSearch;export{Index,Document,Encoder,Charset,WorkerIndex as Worker,Resolver,IdxDB as IndexedDB};
\ No newline at end of file
+import{SearchOptions,ContextOptions,DocumentDescriptor,DocumentSearchOptions,FieldOptions,IndexOptions,DocumentOptions,TagOptions,StoreOptions,EncoderOptions,EncoderSplitOptions,PersistentOptions,ResolverOptions}from"./type.js";import StorageInterface from"./db/interface.js";import Document from"./document.js";import Index from"./index.js";import WorkerIndex from"./worker.js";import Resolver from"./resolver.js";import Encoder from"./encoder.js";import IdxDB from"./db/indexeddb/index.js";import Charset from"./charset.js";Index.prototype.add,Index.prototype.append,Index.prototype.search,Index.prototype.update,Index.prototype.remove,Index.prototype.contain,Index.prototype.clear,Index.prototype.cleanup,Index.prototype.searchCache,Index.prototype.addAsync,Index.prototype.appendAsync,Index.prototype.searchAsync,Index.prototype.updateAsync,Index.prototype.removeAsync,Index.prototype.export,Index.prototype.import,Index.prototype.serialize,Index.prototype.mount,Index.prototype.commit,Index.prototype.destroy,Index.prototype.reg,Index.prototype.map,Index.prototype.ctx,Index.prototype.db,Index.prototype.tag,Index.prototype.store,Index.prototype.depth,Index.prototype.bidirectional,Index.prototype.commit_task,Index.prototype.commit_timer,Index.prototype.cache,Index.prototype.bypass,Index.prototype.document,Index.prototype.encoder,Encoder.prototype.assign,Encoder.prototype.encode,Encoder.prototype.addMatcher,Encoder.prototype.addStemmer,Encoder.prototype.addFilter,Encoder.prototype.addMapper,Encoder.prototype.addReplacer,Document.prototype.add,Document.prototype.append,Document.prototype.search,Document.prototype.update,Document.prototype.remove,Document.prototype.contain,Document.prototype.clear,Document.prototype.cleanup,Document.prototype.addAsync,Document.prototype.appendAsync,Document.prototype.searchAsync,Document.prototype.updateAsync,Document.prototype.removeAsync,Document.prototype.mount,Document.prototype.commit,Document.prototype.destroy,Document.prototype.export,Document.prototype.import,Document.prototype.searchCache,Document.prototype.get,Document.prototype.set,Document.prototype.field,Document.prototype.index,Document.prototype.reg,Document.prototype.tag,Document.prototype.store,Document.prototype.fastupdate,Resolver.prototype.limit,Resolver.prototype.offset,Resolver.prototype.boost,Resolver.prototype.resolve,Resolver.prototype.or,Resolver.prototype.and,Resolver.prototype.xor,Resolver.prototype.not,Resolver.prototype.result,StorageInterface.db,StorageInterface.id,StorageInterface.support_tag_search,StorageInterface.fastupdate,StorageInterface.prototype.mount,StorageInterface.prototype.open,StorageInterface.prototype.close,StorageInterface.prototype.destroy,StorageInterface.prototype.clear,StorageInterface.prototype.get,StorageInterface.prototype.tag,StorageInterface.prototype.enrich,StorageInterface.prototype.has,StorageInterface.prototype.search,StorageInterface.prototype.info,StorageInterface.prototype.commit,StorageInterface.prototype.remove,Charset.LatinExact,Charset.LatinDefault,Charset.LatinSimple,Charset.LatinBalance,Charset.LatinAdvanced,Charset.LatinExtra,Charset.LatinSoundex,Charset.ArabicDefault,Charset.CjkDefault,Charset.CyrillicDefault,IndexOptions.preset,IndexOptions.context,IndexOptions.encoder,IndexOptions.encode,IndexOptions.resolution,IndexOptions.tokenize,IndexOptions.fastupdate,IndexOptions.score,IndexOptions.keystore,IndexOptions.rtl,IndexOptions.cache,IndexOptions.resolve,IndexOptions.db,IndexOptions.worker,IndexOptions.config,IndexOptions.priority,FieldOptions.preset,FieldOptions.context,FieldOptions.encoder,FieldOptions.encode,FieldOptions.resolution,FieldOptions.tokenize,FieldOptions.fastupdate,FieldOptions.score,FieldOptions.keystore,FieldOptions.rtl,FieldOptions.cache,FieldOptions.db,FieldOptions.config,FieldOptions.resolve,FieldOptions.field,FieldOptions.filter,FieldOptions.custom,FieldOptions.worker,DocumentOptions.context,DocumentOptions.encoder,DocumentOptions.encode,DocumentOptions.resolution,DocumentOptions.tokenize,DocumentOptions.fastupdate,DocumentOptions.score,DocumentOptions.keystore,DocumentOptions.rtl,DocumentOptions.cache,DocumentOptions.db,DocumentOptions.doc,DocumentOptions.document,DocumentOptions.worker,DocumentOptions.priority,ContextOptions.depth,ContextOptions.bidirectional,ContextOptions.resolution,DocumentDescriptor.field,DocumentDescriptor.index,DocumentDescriptor.tag,DocumentDescriptor.store,TagOptions.field,TagOptions.tag,TagOptions.filter,TagOptions.custom,TagOptions.keystore,TagOptions.db,TagOptions.config,StoreOptions.field,StoreOptions.filter,StoreOptions.custom,StoreOptions.config,SearchOptions.query,SearchOptions.limit,SearchOptions.offset,SearchOptions.context,SearchOptions.suggest,SearchOptions.resolve,SearchOptions.enrich,SearchOptions.resolution,DocumentSearchOptions.query,DocumentSearchOptions.limit,DocumentSearchOptions.offset,DocumentSearchOptions.context,DocumentSearchOptions.suggest,DocumentSearchOptions.enrich,DocumentSearchOptions.tag,DocumentSearchOptions.field,DocumentSearchOptions.index,DocumentSearchOptions.pluck,DocumentSearchOptions.merge,DocumentSearchOptions.highlight,EncoderOptions.rtl,EncoderOptions.dedupe,EncoderOptions.split,EncoderOptions.include,EncoderOptions.exclude,EncoderOptions.prepare,EncoderOptions.finalize,EncoderOptions.filter,EncoderOptions.matcher,EncoderOptions.mapper,EncoderOptions.stemmer,EncoderOptions.replacer,EncoderOptions.minlength,EncoderOptions.maxlength,EncoderOptions.cache,EncoderSplitOptions.letter,EncoderSplitOptions.number,EncoderSplitOptions.symbol,EncoderSplitOptions.punctuation,EncoderSplitOptions.control,EncoderSplitOptions.char,PersistentOptions.name,PersistentOptions.field,PersistentOptions.type,PersistentOptions.db,ResolverOptions.index,ResolverOptions.query,ResolverOptions.limit,ResolverOptions.offset,ResolverOptions.enrich,ResolverOptions.resolve,ResolverOptions.suggest,ResolverOptions.and,ResolverOptions.or,ResolverOptions.xor,ResolverOptions.not;const FlexSearch={Index:Index,Charset:Charset,Encoder:Encoder,Document:Document,Worker:WorkerIndex,Resolver:Resolver,IndexedDB:IdxDB,Language:{}};{FlexSearch.Language={};const a="undefined"==typeof self?"undefined"==typeof global?"undefined"==typeof window?{}:window:global:self;let b;(b=a.define)&&b.amd?b([],function(){return FlexSearch}):"object"==typeof a.exports?a.exports=FlexSearch:a.FlexSearch=FlexSearch}export default FlexSearch;export{Index,Document,Encoder,Charset,WorkerIndex as Worker,Resolver,IdxDB as IndexedDB};
\ No newline at end of file
diff --git a/dist/module-min/worker.js b/dist/module-min/worker.js
index d89b7aa..9d02ede 100644
--- a/dist/module-min/worker.js
+++ b/dist/module-min/worker.js
@@ -1 +1 @@
-import{IndexOptions}from"./type.js";import{create_object,is_function,is_object,is_string}from"./common.js";import handler from"./worker/handler.js";let pid=0;export default function WorkerIndex(a={}){function b(b){function f(a){a=a.data||a;const b=a.id,c=b&&e.resolver[b];c&&(c(a.msg),delete e.resolver[b])}if(this.worker=b,this.resolver=create_object(),!!this.worker)return(d?this.worker.on("message",f):this.worker.onmessage=f,a.config)?new Promise(function(b){e.resolver[++pid]=function(){b(e)},e.worker.postMessage({id:pid,task:"init",factory:c,options:a})}):(this.worker.postMessage({task:"init",factory:c,options:a}),this)}if(!this||this.constructor!==WorkerIndex)return new WorkerIndex(a);let c="undefined"==typeof self?"undefined"==typeof window?null:window._factory:self._factory;c&&(c=c.toString());const d="undefined"==typeof window,e=this,f=create(c,d,a.worker);return f.then?f.then(function(a){return b.call(e,a)}):b.call(this,f)}register("add"),register("append"),register("search"),register("update"),register("remove");function register(a){WorkerIndex.prototype[a]=WorkerIndex.prototype[a+"Async"]=async function(){const b=this,c=[].slice.call(arguments),d=c[c.length-1];let e;is_function(d)&&(e=d,c.splice(c.length-1,1));const f=new Promise(function(d){b.resolver[++pid]=d,b.worker.postMessage({task:a,id:pid,args:c})});return e?(f.then(e),this):f}}function create(a,b,c){let d;return d=b?"undefined"==typeof module?(0,eval)("import(\"worker_threads\").then(function(worker){ return new worker[\"Worker\"]((1,eval)(\"import.meta.dirname\") + \"/node/node.mjs\"); })"):(0,eval)("new (require(\"worker_threads\")[\"Worker\"])(__dirname + \"/node/node.js\")"):a?new window.Worker(URL.createObjectURL(new Blob(["onmessage="+handler.toString()],{type:"text/javascript"}))):new window.Worker(is_string(c)?c:(1,eval)("import.meta.url").replace("/worker.js","/worker/worker.js").replace("flexsearch.bundle.module.min.js","module/worker/worker.js"),{type:"module"}),d}
\ No newline at end of file
+import{IndexOptions}from"./type.js";import{create_object,is_function,is_object,is_string}from"./common.js";import handler from"./worker/handler.js";import apply_async from"./async.js";let pid=0;export default function WorkerIndex(a={}){function b(b){function f(a){a=a.data||a;const b=a.id,c=b&&e.resolver[b];c&&(c(a.msg),delete e.resolver[b])}if(this.worker=b,this.resolver=create_object(),!!this.worker)return(d?this.worker.on("message",f):this.worker.onmessage=f,a.config)?new Promise(function(b){e.resolver[++pid]=function(){b(e)},e.worker.postMessage({id:pid,task:"init",factory:c,options:a})}):(this.worker.postMessage({task:"init",factory:c,options:a}),this)}if(!this||this.constructor!==WorkerIndex)return new WorkerIndex(a);let c="undefined"==typeof self?"undefined"==typeof window?null:window._factory:self._factory;c&&(c=c.toString());const d="undefined"==typeof window,e=this,f=create(c,d,a.worker);return f.then?f.then(function(a){return b.call(e,a)}):b.call(this,f)}register("add"),register("append"),register("search"),register("update"),register("remove"),register("clear"),register("export"),register("import"),apply_async(WorkerIndex.prototype);function register(a){WorkerIndex.prototype[a]=async function(){const b=this,c=[].slice.call(arguments),d=c[c.length-1];let e;is_function(d)&&(e=d,c.splice(c.length-1,1));const f=new Promise(function(d){b.resolver[++pid]=d,b.worker.postMessage({task:a,id:pid,args:c})});return e?(f.then(e),this):f}}function create(a,b,c){let d;return d=b?"undefined"==typeof module?(0,eval)("import(\"worker_threads\").then(function(worker){ return new worker[\"Worker\"]((1,eval)(\"import.meta.dirname\") + \"/node/node.mjs\"); })"):(0,eval)("new (require(\"worker_threads\")[\"Worker\"])(__dirname + \"/node/node.js\")"):a?new window.Worker(URL.createObjectURL(new Blob(["onmessage="+handler.toString()],{type:"text/javascript"}))):new window.Worker(is_string(c)?c:(1,eval)("import.meta.url").replace("/worker.js","/worker/worker.js").replace("flexsearch.bundle.module.min.js","module/worker/worker.js"),{type:"module"}),d}
\ No newline at end of file
diff --git a/dist/module-min/worker/handler.js b/dist/module-min/worker/handler.js
index 5527b3b..df303f1 100644
--- a/dist/module-min/worker/handler.js
+++ b/dist/module-min/worker/handler.js
@@ -1 +1 @@
-import Index from"../index.js";import{IndexOptions}from"../type.js";export default(async function(a){a=a.data;const b=self._index,c=a.args,d=a.task;switch(d){case"init":let e=a.options||{},f=e.config;f&&(e=e);const g=a.factory;g?(Function("return "+g)()(self),self._index=new self.FlexSearch.Index(e),delete self.FlexSearch):self._index=new Index(e),postMessage({id:a.id});break;default:const h=a.id,i=b[d].apply(b,c);postMessage("search"===d?{id:h,msg:i}:{id:h});}});
\ No newline at end of file
+import Index from"../index.js";import{IndexOptions}from"../type.js";let index,options;export default(async function(a){a=a.data;const b=a.task,c=a.id;let d=a.args;switch(b){case"init":options=a.options||{};let e=options.config;e&&(options=options);const f=a.factory;f?(Function("return "+f)()(self),index=new self.FlexSearch.Index(options),delete self.FlexSearch):index=new Index(options),postMessage({id:c});break;default:let g;"export"===b&&(d=[options.export]),"import"===b?await options.import.call(index,index):g=index[b].apply(index,d),postMessage("search"===b?{id:c,msg:g}:{id:c});}});
\ No newline at end of file
diff --git a/dist/module-min/worker/node.js b/dist/module-min/worker/node.js
index 43d61e6..10913b8 100644
--- a/dist/module-min/worker/node.js
+++ b/dist/module-min/worker/node.js
@@ -1 +1 @@
-const{parentPort}=require("worker_threads"),{join}=require("path"),{Index}=require("../flexsearch.bundle.min.js");let index;parentPort.on("message",async function(a){const b=a.args,c=a.task,d=a.id;switch(c){case"init":let e=a.options||{},f=e.config;f&&(e=Object.assign({},e,require(f)),delete e.worker),index=new Index(e),parentPort.postMessage({id:d});break;default:const g=index[c].apply(index,b);parentPort.postMessage("search"===c?{id:d,msg:g}:{id:d});}});
\ No newline at end of file
+const{parentPort}=require("worker_threads"),{Index}=require("flexsearch");let index,options;parentPort.on("message",async function(a){const b=a.task,c=a.id;let d=a.args;switch(b){case"init":options=a.options||{};let e=options.config;e&&(options=Object.assign({},options,require(e)),delete options.worker),index=new Index(options),parentPort.postMessage({id:c});break;default:let f;"export"===b&&(d=[options.export]),"import"===b?await options.import.call(index,index):f=index[b].apply(index,d),parentPort.postMessage("search"===b?{id:c,msg:f}:{id:c});}});
\ No newline at end of file
diff --git a/dist/module/bundle.js b/dist/module/bundle.js
index 318ee70..fa3752c 100644
--- a/dist/module/bundle.js
+++ b/dist/module/bundle.js
@@ -276,7 +276,7 @@ const FlexSearch = {
 
     FlexSearch.Language = {};
 
-    const root = self;
+    const root = "undefined" != typeof self ? self : "undefined" != typeof global ? global : "undefined" != typeof window ? window : {};
     let prop;
 
     // AMD (RequireJS)
diff --git a/dist/module/worker.js b/dist/module/worker.js
index fa1feac..2fc99f1 100644
--- a/dist/module/worker.js
+++ b/dist/module/worker.js
@@ -1,6 +1,7 @@
 import { IndexOptions } from "./type.js";
 import { create_object, is_function, is_object, is_string } from "./common.js";
 import handler from "./worker/handler.js";
+import apply_async from "./async.js";
 
 let pid = 0;
 
@@ -90,10 +91,16 @@ register("append");
 register("search");
 register("update");
 register("remove");
+register("clear");
+register("export");
+register("import");
+
+apply_async(WorkerIndex.prototype);
 
 function register(key) {
 
-    WorkerIndex.prototype[key] = WorkerIndex.prototype[key + "Async"] = async function () {
+    WorkerIndex.prototype[key] =
+    /*WorkerIndex.prototype[key + "Async"] =*/async function () {
         const self = this,
               args = [].slice.call(arguments),
               arg = args[args.length - 1];
diff --git a/dist/module/worker/handler.js b/dist/module/worker/handler.js
index 4b77dc7..990e152 100644
--- a/dist/module/worker/handler.js
+++ b/dist/module/worker/handler.js
@@ -1,24 +1,25 @@
 import Index from "../index.js";
 import { IndexOptions } from "../type.js";
 
+/** @type Index */
+let index, options;
+/** @type {IndexOptions} */
+
 export default (async function (data) {
 
     data = data.data;
 
-    /** @type Index */
-    const index = self._index,
-          args = data.args,
-          task = data.task;
+    const task = data.task,
+          id = data.id;
 
+    let args = data.args;
 
     switch (task) {
 
         case "init":
 
-            /** @type {IndexOptions} */
-            let options = data.options || {},
-                filepath = options.config;
-
+            options = data.options || {};
+            let filepath = options.config;
             if (filepath) {
                 options = options;
                 // will be replaced after build with the line below because
@@ -33,22 +34,31 @@ export default (async function (data) {
                 // export the FlexSearch global payload to "self"
                 Function("return " + factory)()(self);
 
-                /** @type Index */
-                self._index = new self.FlexSearch.Index(options);
+                index = new self.FlexSearch.Index(options);
 
                 // destroy the exported payload
                 delete self.FlexSearch;
             } else {
 
-                self._index = new Index(options);
+                index = new Index(options);
             }
 
-            postMessage({ id: data.id });
+            postMessage({ id: id });
             break;
 
         default:
-            const id = data.id,
-                  message = index[task].apply(index, args);
+
+            let message;
+
+            if ("export" === task) {
+                args = [options.export];
+            }
+            if ("import" === task) {
+                await options.import.call(index, index);
+                //args = [options.import];
+            } else {
+                message = index[task].apply(index, args);
+            }
 
             postMessage("search" === task ? { id: id, msg: message } : { id: id });
     }
diff --git a/dist/module/worker/node.js b/dist/module/worker/node.js
index 48f0621..9d154eb 100644
--- a/dist/module/worker/node.js
+++ b/dist/module/worker/node.js
@@ -1,27 +1,27 @@
 const { parentPort } = require("worker_threads"),
-      { join } = require("path"),
-      { Index } = require("../flexsearch.bundle.min.js");
+      { Index } = require("flexsearch");
+//const { join } = require("path");
 // Test Path
 //const { Index } = require("../../dist/flexsearch.bundle.min.js");
 
 
-let index;
+/** @type Index */
+let index, options;
+/** @type {IndexOptions} */
 
 parentPort.on("message", async function (data) {
-
-    /** @type Index */
-    const args = data.args,
-          task = data.task,
+    const task = data.task,
           id = data.id;
 
+    let args = data.args;
 
     switch (task) {
 
         case "init":
-            let options = data.options || {},
-                filepath = options.config;
-            // load extern field configuration
 
+            options = data.options || {};
+            // load extern field configuration
+            let filepath = options.config;
             if (filepath) {
                 options = Object.assign({}, options, require(filepath));
                 delete options.worker;
@@ -35,7 +35,18 @@ parentPort.on("message", async function (data) {
 
         default:
 
-            const message = index[task].apply(index, args);
+            let message;
+
+            if ("export" === task) {
+                args = [options.export];
+            }
+            if ("import" === task) {
+                await options.import.call(index, index);
+                //args = [options.import];
+            } else {
+                message = index[task].apply(index, args);
+            }
+
             parentPort.postMessage("search" === task ? { id: id, msg: message } : { id: id });
     }
 });
\ No newline at end of file
diff --git a/dist/node/node.js b/dist/node/node.js
index 3898b9a..dc3f76b 100644
--- a/dist/node/node.js
+++ b/dist/node/node.js
@@ -1,23 +1,25 @@
 const { parentPort } = require("worker_threads");
-const { join } = require("path");
+//const { join } = require("path");
 // Test Path
 //const { Index } = require("../../dist/flexsearch.bundle.min.js");
-const { Index } = require("../flexsearch.bundle.min.js");
+const { Index } = require("flexsearch");
 
+/** @type Index */
 let index;
+/** @type {IndexOptions} */
+let options;
 
 parentPort.on("message", async function(data){
 
-    /** @type Index */
-    const args = data["args"];
     const task = data["task"];
     const id = data["id"];
+    let args = data["args"];
 
     switch(task){
 
         case "init":
 
-            let options = data["options"] || {};
+            options = data["options"] || {};
             // load extern field configuration
             let filepath = options["config"];
             if(filepath){
@@ -33,7 +35,19 @@ parentPort.on("message", async function(data){
 
         default:
 
-            const message = index[task].apply(index, args);
+            let message;
+
+            if(task === "export"){
+                args = [options.export];
+            }
+            if(task === "import"){
+                await options.import.call(index, index);
+                //args = [options.import];
+            }
+            else{
+                message = index[task].apply(index, args);
+            }
+
             parentPort.postMessage(
                 task === "search"
                     ? { "id": id, "msg": message }
diff --git a/dist/node/node.mjs b/dist/node/node.mjs
index 0248f08..12eda37 100644
--- a/dist/node/node.mjs
+++ b/dist/node/node.mjs
@@ -3,22 +3,24 @@ import { join } from "path";
 // Test Path
 //import Index from "../../src/index.js";
 //import { Index } from "../../dist/flexsearch.bundle.module.min.js";
-import { Index } from "../flexsearch.bundle.module.min.js";
+import { Index } from "flexsearch/esm";
 
+/** @type Index */
 let index;
+/** @type {IndexOptions} */
+let options;
 
 parentPort.on("message", async function(data){
 
-    /** @type Index */
-    const args = data["args"];
     const task = data["task"];
     const id = data["id"];
+    let args = data["args"];
 
     switch(task){
 
         case "init":
 
-            let options = data["options"] || {};
+            options = data["options"] || {};
             // load extern field configuration
             let filepath = options["config"];
             if(filepath){
@@ -35,7 +37,19 @@ parentPort.on("message", async function(data){
 
         default:
 
-            const message = index[task].apply(index, args);
+            let message;
+
+            if(task === "export"){
+                args = [options.export];
+            }
+            if(task === "import"){
+                await options.import.call(index, index);
+                //args = [options.import];
+            }
+            else{
+                message = index[task].apply(index, args);
+            }
+
             parentPort.postMessage(
                 task === "search"
                     ? { "id": id, "msg": message }
diff --git a/doc/0.8.0.md b/doc/0.8.0.md
index 222474f..e9c2241 100644
--- a/doc/0.8.0.md
+++ b/doc/0.8.0.md
@@ -1,7 +1,7 @@
 # FlexSearch v0.8 (Preview)
 
 ```bash
-npm install git+https://github.com/nextapps-de/flexsearch/tree/master
+npm install flexsearch@latest
 ```
 
 ## What's New
@@ -1845,13 +1845,13 @@ for(let i = 0; i < files.length; i++){
 - Instead of e.g. "latin:simple" the Charset collection is exported as a module and has to be imported by e.g. `import LatinSimple from "./charset.js"` and then assigned to an existing Encoder by `encoder.assign(LatinSimple)` or by creation `encoder = new Encoder(LatinSimple)`
 - You can import language packs by `dist/module/lang/*` when using ESM and by `const EnglishPreset = require("flexsearch/lang/en");` when using CommonJS (Node.js)
 - The method `index.append()` is now deprecated and will be removed in the near future, because it isn't consistent and leads into unexpected behavior when not used properly. You should only use `index.add()` to push contents to the index.
-- Using the `async` variants like `.searchAsync` is now deprecated (but still works), asynchronous responses will always return from Worker-Index and from Persistent-Index, everything else will return a non-promised result. Having both types of methods looks like the developers can choose between them, but they can't.
+- ~~Using the `async` variants like `.searchAsync` is now deprecated (but still works), asynchronous responses will always return from Worker-Index and from Persistent-Index, everything else will return a non-promised result. Having both types of methods looks like the developers can choose between them, but they can't.~~
 - Any of your exports from versions below v0.8 are not compatible to import into v0.8
 
 ## What's next?
 
 Unfortunately, not everything could be finished and needs to be done in the upcoming version.
 
-- The `Resolver` currently does not support Document-Indexes, there is still some work to do.
+- ~~The `Resolver` currently does not support Document-Indexes, there is still some work to do.~~
 - Config serialization for persistent indexes (store configuration, check migrations, import and restore field configurations)
 - Tooling for persistent indexes (list all tables, remove tables)
diff --git a/example/nodejs-commonjs/basic-export-import/index.js b/example/nodejs-commonjs/basic-export-import/index.js
index c0bbc00..58b125f 100644
--- a/example/nodejs-commonjs/basic-export-import/index.js
+++ b/example/nodejs-commonjs/basic-export-import/index.js
@@ -36,6 +36,7 @@ const { Index } = require("flexsearch");
         console.log(data[i]);
     });
 
+    // -----------------------
     // EXPORT
     // -----------------------
 
@@ -46,6 +47,7 @@ const { Index } = require("flexsearch");
         await fs.writeFile("./export/" + key, data, "utf8");
     });
 
+    // -----------------------
     // IMPORT
     // -----------------------
 
diff --git a/example/nodejs-commonjs/basic-worker-export-import/config.js b/example/nodejs-commonjs/basic-worker-export-import/config.js
new file mode 100644
index 0000000..9ab409b
--- /dev/null
+++ b/example/nodejs-commonjs/basic-worker-export-import/config.js
@@ -0,0 +1,29 @@
+const { Encoder } = require("flexsearch");
+const fs = require("fs").promises;
+
+(async function(){
+    await fs.mkdir("./export/").catch(e => {});
+}());
+
+module.exports = {
+    tokenize: "forward",
+    encoder: new Encoder({
+        normalize: function(str){
+            return str.toLowerCase();
+        }
+    }),
+    export: async function(key, data){
+
+        await fs.writeFile("./export/" + key, data, "utf8");
+    },
+    import: async function(index){
+
+        let files = await fs.readdir("./export/");
+        files = await Promise.all(files);
+
+        for(let i = 0; i < files.length; i++){
+            const data = await fs.readFile("./export/" + files[i], "utf8");
+            index.import(files[i], data);
+        }
+    }
+};
\ No newline at end of file
diff --git a/example/nodejs-commonjs/basic-worker-export-import/index.js b/example/nodejs-commonjs/basic-worker-export-import/index.js
new file mode 100644
index 0000000..5997146
--- /dev/null
+++ b/example/nodejs-commonjs/basic-worker-export-import/index.js
@@ -0,0 +1,68 @@
+const { Worker: WorkerIndex } = require("flexsearch");
+
+(async function(){
+
+    // create a simple index which can store id-content-pairs
+    // and await (!) for the worker response
+    let index = await new WorkerIndex({
+        tokenize: "forward",
+        config: __dirname + "/config.js"
+    });
+
+    // some test data
+    const data = [
+        'cats abcd efgh ijkl mnop qrst uvwx cute',
+        'cats abcd efgh ijkl mnop qrst cute',
+        'cats abcd efgh ijkl mnop cute',
+        'cats abcd efgh ijkl cute',
+        'cats abcd efgh cute',
+        'cats abcd cute',
+        'cats cute'
+    ];
+
+    // add test data
+    data.forEach((item, id) => {
+        index.add(id, item);
+    });
+
+    // perform query
+    let result = await index.search({
+        query: "cute cat",
+    });
+
+    // display results
+    result.forEach(i => {
+        console.log(data[i]);
+    });
+
+    // -----------------------
+    // EXPORT
+    // -----------------------
+
+    await index.export(function(){
+        // do nothing here
+    });
+
+    index = await new WorkerIndex({
+        tokenize: "forward",
+        config: __dirname + "/config.js"
+    });
+
+    // -----------------------
+    // IMPORT
+    // -----------------------
+
+    await index.import();
+
+    // perform query
+    result = await index.search({
+        query: "cute cat",
+    });
+
+    // display results
+    console.log("-------------------------------------");
+    result.forEach(i => {
+        console.log(data[i]);
+    });
+
+}());
diff --git a/example/nodejs-commonjs/basic-worker-export-import/package.json b/example/nodejs-commonjs/basic-worker-export-import/package.json
new file mode 100644
index 0000000..340dea6
--- /dev/null
+++ b/example/nodejs-commonjs/basic-worker-export-import/package.json
@@ -0,0 +1,6 @@
+{
+  "name": "nodejs-commonjs-basic-worker-extern-config",
+  "dependencies": {
+    "flexsearch": "^0.8.105"
+  }
+}
diff --git a/example/nodejs-commonjs/basic-worker-extern-config/config.js b/example/nodejs-commonjs/basic-worker-extern-config/config.js
index 3bf5a68..e8f81f9 100644
--- a/example/nodejs-commonjs/basic-worker-extern-config/config.js
+++ b/example/nodejs-commonjs/basic-worker-extern-config/config.js
@@ -1,6 +1,6 @@
-import { Encoder } from "flexsearch/esm";
+const { Encoder } = require("flexsearch");
 
-export default {
+module.exports = {
     tokenize: "forward",
     encoder: new Encoder({
         normalize: function(str){
diff --git a/example/nodejs-esm/basic-worker-export-import/config.js b/example/nodejs-esm/basic-worker-export-import/config.js
new file mode 100644
index 0000000..907c96d
--- /dev/null
+++ b/example/nodejs-esm/basic-worker-export-import/config.js
@@ -0,0 +1,29 @@
+import { Encoder } from "flexsearch/esm";
+import { promises as fs } from "fs";
+
+(async function(){
+    await fs.mkdir("./export/").catch(e => {});
+}());
+
+export default {
+    tokenize: "forward",
+    encoder: new Encoder({
+        normalize: function(str){
+            return str.toLowerCase();
+        }
+    }),
+    export: async function(key, data){
+
+        await fs.writeFile("./export/" + key, data, "utf8");
+    },
+    import: async function(index){
+
+        let files = await fs.readdir("./export/");
+        files = await Promise.all(files);
+
+        for(let i = 0; i < files.length; i++){
+            const data = await fs.readFile("./export/" + files[i], "utf8");
+            index.import(files[i], data);
+        }
+    }
+};
\ No newline at end of file
diff --git a/example/nodejs-esm/basic-worker-export-import/index.js b/example/nodejs-esm/basic-worker-export-import/index.js
new file mode 100644
index 0000000..271f13c
--- /dev/null
+++ b/example/nodejs-esm/basic-worker-export-import/index.js
@@ -0,0 +1,69 @@
+import { Worker as WorkerIndex } from "flexsearch/esm";
+const dirname = import.meta.dirname;
+
+(async function(){
+
+    // create a simple index which can store id-content-pairs
+    // and await (!) for the worker response
+    let index = await new WorkerIndex({
+        tokenize: "forward",
+        config: dirname + "/config.js"
+    });
+
+    // some test data
+    const data = [
+        'cats abcd efgh ijkl mnop qrst uvwx cute',
+        'cats abcd efgh ijkl mnop qrst cute',
+        'cats abcd efgh ijkl mnop cute',
+        'cats abcd efgh ijkl cute',
+        'cats abcd efgh cute',
+        'cats abcd cute',
+        'cats cute'
+    ];
+
+    // add test data
+    data.forEach((item, id) => {
+        index.add(id, item);
+    });
+
+    // perform query
+    let result = await index.search({
+        query: "cute cat",
+    });
+
+    // display results
+    result.forEach(i => {
+        console.log(data[i]);
+    });
+
+    // -----------------------
+    // EXPORT
+    // -----------------------
+
+    await index.export(function(){
+        // do nothing here
+    });
+
+    index = await new WorkerIndex({
+        tokenize: "forward",
+        config: dirname + "/config.js"
+    });
+
+    // -----------------------
+    // IMPORT
+    // -----------------------
+
+    await index.import();
+
+    // perform query
+    result = await index.search({
+        query: "cute cat",
+    });
+
+    // display results
+    console.log("-------------------------------------");
+    result.forEach(i => {
+        console.log(data[i]);
+    });
+
+}());
diff --git a/example/nodejs-esm/basic-worker-export-import/package.json b/example/nodejs-esm/basic-worker-export-import/package.json
new file mode 100644
index 0000000..c179cf9
--- /dev/null
+++ b/example/nodejs-esm/basic-worker-export-import/package.json
@@ -0,0 +1,7 @@
+{
+  "name": "nodejs-esm-basic-worker-extern-config",
+  "type": "module",
+  "dependencies": {
+    "flexsearch": "^0.8.105"
+  }
+}
diff --git a/package-lock.json b/package-lock.json
index d24f6ee..074291a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "flexsearch",
-  "version": "0.8.107",
+  "version": "0.8.108",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "flexsearch",
-      "version": "0.8.107",
+      "version": "0.8.108",
       "funding": [
         {
           "type": "github",
diff --git a/package.json b/package.json
index c2e7b14..ed9fa6a 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "public": true,
   "preferGlobal": false,
   "name": "flexsearch",
-  "version": "0.8.107",
+  "version": "0.8.108",
   "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/bundle.js b/src/bundle.js
index ac905d8..85a24e2 100644
--- a/src/bundle.js
+++ b/src/bundle.js
@@ -310,7 +310,9 @@ if(RELEASE !== "bundle.module" &&
 
     FlexSearch["Language"] = {};
 
-    const root = self;
+    const root = typeof self !== "undefined" ? self :
+                 typeof global !== "undefined" ? global :
+                 typeof window !== "undefined" ? window : {};
     let prop;
 
     // AMD (RequireJS)
diff --git a/src/worker.js b/src/worker.js
index 860ad87..c5fac26 100644
--- a/src/worker.js
+++ b/src/worker.js
@@ -1,6 +1,7 @@
 import { IndexOptions } from "./type.js";
 import { create_object, is_function, is_object, is_string } from "./common.js";
 import handler from "./worker/handler.js";
+import apply_async from "./async.js";
 
 let pid = 0;
 
@@ -97,11 +98,16 @@ register("append");
 register("search");
 register("update");
 register("remove");
+register("clear");
+register("export");
+register("import");
+
+apply_async(WorkerIndex.prototype);
 
 function register(key){
 
     WorkerIndex.prototype[key] =
-    WorkerIndex.prototype[key + "Async"] = async function(){
+    /*WorkerIndex.prototype[key + "Async"] =*/ async function(){
 
         const self = this;
         const args = [].slice.call(arguments);
diff --git a/src/worker/handler.js b/src/worker/handler.js
index 37747c0..0f4f7c0 100644
--- a/src/worker/handler.js
+++ b/src/worker/handler.js
@@ -1,21 +1,24 @@
 import Index from "../index.js";
 import { IndexOptions } from "../type.js";
 
+/** @type Index */
+let index;
+/** @type {IndexOptions} */
+let options;
+
 export default async function(data) {
 
     data = data["data"];
 
-    /** @type Index */
-    const index = self["_index"];
-    const args = data["args"];
     const task = data["task"];
+    const id = data["id"];
+    let args = data["args"];
 
     switch(task){
 
         case "init":
 
-            /** @type {IndexOptions} */
-            let options = data["options"] || {};
+            options = data["options"] || {};
             let filepath = options.config;
             if(filepath){
                 options = options;
@@ -31,24 +34,34 @@ export default async function(data) {
                 // export the FlexSearch global payload to "self"
                 Function("return " + factory)()(self);
 
-                /** @type Index */
-                self["_index"] = new self["FlexSearch"]["Index"](options);
+                index = new self["FlexSearch"]["Index"](options);
 
                 // destroy the exported payload
                 delete self["FlexSearch"];
             }
             else{
 
-                self["_index"] = new Index(options);
+                index = new Index(options);
             }
 
-            postMessage({ "id": data["id"] });
+            postMessage({ "id": id });
             break;
 
         default:
 
-            const id = data["id"];
-            const message = index[task].apply(index, args);
+            let message;
+
+            if(task === "export"){
+                args = [options.export];
+            }
+            if(task === "import"){
+                await options.import.call(index, index);
+                //args = [options.import];
+            }
+            else{
+                message = index[task].apply(index, args);
+            }
+
             postMessage(
                 task === "search"
                     ? { "id": id, "msg": message }
diff --git a/src/worker/node.js b/src/worker/node.js
index 3898b9a..dc3f76b 100644
--- a/src/worker/node.js
+++ b/src/worker/node.js
@@ -1,23 +1,25 @@
 const { parentPort } = require("worker_threads");
-const { join } = require("path");
+//const { join } = require("path");
 // Test Path
 //const { Index } = require("../../dist/flexsearch.bundle.min.js");
-const { Index } = require("../flexsearch.bundle.min.js");
+const { Index } = require("flexsearch");
 
+/** @type Index */
 let index;
+/** @type {IndexOptions} */
+let options;
 
 parentPort.on("message", async function(data){
 
-    /** @type Index */
-    const args = data["args"];
     const task = data["task"];
     const id = data["id"];
+    let args = data["args"];
 
     switch(task){
 
         case "init":
 
-            let options = data["options"] || {};
+            options = data["options"] || {};
             // load extern field configuration
             let filepath = options["config"];
             if(filepath){
@@ -33,7 +35,19 @@ parentPort.on("message", async function(data){
 
         default:
 
-            const message = index[task].apply(index, args);
+            let message;
+
+            if(task === "export"){
+                args = [options.export];
+            }
+            if(task === "import"){
+                await options.import.call(index, index);
+                //args = [options.import];
+            }
+            else{
+                message = index[task].apply(index, args);
+            }
+
             parentPort.postMessage(
                 task === "search"
                     ? { "id": id, "msg": message }
diff --git a/src/worker/node.mjs b/src/worker/node.mjs
index 0248f08..12eda37 100644
--- a/src/worker/node.mjs
+++ b/src/worker/node.mjs
@@ -3,22 +3,24 @@ import { join } from "path";
 // Test Path
 //import Index from "../../src/index.js";
 //import { Index } from "../../dist/flexsearch.bundle.module.min.js";
-import { Index } from "../flexsearch.bundle.module.min.js";
+import { Index } from "flexsearch/esm";
 
+/** @type Index */
 let index;
+/** @type {IndexOptions} */
+let options;
 
 parentPort.on("message", async function(data){
 
-    /** @type Index */
-    const args = data["args"];
     const task = data["task"];
     const id = data["id"];
+    let args = data["args"];
 
     switch(task){
 
         case "init":
 
-            let options = data["options"] || {};
+            options = data["options"] || {};
             // load extern field configuration
             let filepath = options["config"];
             if(filepath){
@@ -35,7 +37,19 @@ parentPort.on("message", async function(data){
 
         default:
 
-            const message = index[task].apply(index, args);
+            let message;
+
+            if(task === "export"){
+                args = [options.export];
+            }
+            if(task === "import"){
+                await options.import.call(index, index);
+                //args = [options.import];
+            }
+            else{
+                message = index[task].apply(index, args);
+            }
+
             parentPort.postMessage(
                 task === "search"
                     ? { "id": id, "msg": message }