diff --git a/dist/flexsearch.bundle.debug.js b/dist/flexsearch.bundle.debug.js
index db88c9e..45b7226 100644
--- a/dist/flexsearch.bundle.debug.js
+++ b/dist/flexsearch.bundle.debug.js
@@ -1,5 +1,5 @@
 /**!
- * FlexSearch.js v0.8.135 (Bundle/Debug)
+ * FlexSearch.js v0.8.138 (Bundle/Debug)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
@@ -2548,7 +2548,7 @@ function Z(a) {
     a = null;
   });
 }
-;const ub = {Index:N, Charset:eb, Encoder:ka, Document:U, Worker:P, Resolver:W, IndexedDB:rb, Language:{}}, vb = "undefined" !== typeof global ? global : self;
+;const ub = {Index:N, Charset:eb, Encoder:ka, Document:U, Worker:P, Resolver:W, IndexedDB:rb, Language:{}}, vb = "undefined" !== typeof self ? self : "undefined" !== typeof global ? global : self;
 let wb;
 (wb = vb.define) && wb.amd ? wb([], function() {
   return ub;
diff --git a/dist/flexsearch.bundle.min.js b/dist/flexsearch.bundle.min.js
index 02c9dbd..ead5583 100644
--- a/dist/flexsearch.bundle.min.js
+++ b/dist/flexsearch.bundle.min.js
@@ -1,5 +1,5 @@
 /**!
- * FlexSearch.js v0.8.135 (Bundle)
+ * FlexSearch.js v0.8.138 (Bundle)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
@@ -101,4 +101,4 @@ for(let n=0,m,q;n<l;n++)if((q=g[n])&&q.length){if((m=k[n])&&m.length)for(h=0;h<q
 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 tb(a,c,b){const e=a.value;let d,f,g=0;for(let k=0,h;k<e.length;k++){if(h=b?e:e[k]){for(let l=0,n,m;l<c.length;l++)if(m=c[l],n=h.indexOf(f?parseInt(m,10):m),0>n&&!f&&"string"===typeof m&&!isNaN(m)&&(n=h.indexOf(parseInt(m,10)))&&(f=1),0<=n)if(d=1,1<h.length)h.splice(n,1);else{e[k]=[];break}g+=h.length}if(b)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"+(this.field?":"+this.field:""),"readwrite",function(c){c.openCursor().onsuccess=function(){const b=this.result;b&&tb(b,a)}}),this.transaction("ctx"+(this.field?":"+this.field:""),"readwrite",function(c){c.openCursor().onsuccess=function(){const b=this.result;b&&tb(b,a)}}),this.transaction("tag"+(this.field?":"+this.field:""),"readwrite",function(c){c.openCursor().onsuccess=function(){const b=this.result;b&&
-tb(b,a,!0)}}),this.transaction("reg","readwrite",function(c){for(let b=0;b<a.length;b++)c.delete(a[b])})])};function Z(a){return new Promise((c,b)=>{a.onsuccess=function(){c(this.result)};a.oncomplete=function(){c()};a.onerror=b;a=null})};const ub={Index:N,Charset:eb,Encoder:J,Document:U,Worker:P,Resolver:W,IndexedDB:sb,Language:{}},vb="undefined"!==typeof global?global:self;let wb;(wb=vb.define)&&wb.amd?wb([],function(){return ub}):"object"===typeof vb.exports?vb.exports=ub:vb.FlexSearch=ub;}(this||self));
+tb(b,a,!0)}}),this.transaction("reg","readwrite",function(c){for(let b=0;b<a.length;b++)c.delete(a[b])})])};function Z(a){return new Promise((c,b)=>{a.onsuccess=function(){c(this.result)};a.oncomplete=function(){c()};a.onerror=b;a=null})};const ub={Index:N,Charset:eb,Encoder:J,Document:U,Worker:P,Resolver:W,IndexedDB:sb,Language:{}},vb="undefined"!==typeof self?self:"undefined"!==typeof global?global:self;let wb;(wb=vb.define)&&wb.amd?wb([],function(){return ub}):"object"===typeof vb.exports?vb.exports=ub:vb.FlexSearch=ub;}(this||self));
diff --git a/dist/flexsearch.bundle.module.debug.js b/dist/flexsearch.bundle.module.debug.js
index 1a68b88..aef68ff 100644
--- a/dist/flexsearch.bundle.module.debug.js
+++ b/dist/flexsearch.bundle.module.debug.js
@@ -1,5 +1,5 @@
 /**!
- * FlexSearch.js v0.8.135 (Bundle/Module/Debug)
+ * FlexSearch.js v0.8.138 (Bundle/Module/Debug)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
diff --git a/dist/flexsearch.bundle.module.min.js b/dist/flexsearch.bundle.module.min.js
index 5acf655..89dd8a5 100644
--- a/dist/flexsearch.bundle.module.min.js
+++ b/dist/flexsearch.bundle.module.min.js
@@ -1,5 +1,5 @@
 /**!
- * FlexSearch.js v0.8.135 (Bundle/Module)
+ * FlexSearch.js v0.8.138 (Bundle/Module)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
diff --git a/dist/flexsearch.compact.debug.js b/dist/flexsearch.compact.debug.js
index 50c9026..a5c5508 100644
--- a/dist/flexsearch.compact.debug.js
+++ b/dist/flexsearch.compact.debug.js
@@ -1,5 +1,5 @@
 /**!
- * FlexSearch.js v0.8.135 (Bundle/Debug)
+ * FlexSearch.js v0.8.138 (Bundle/Debug)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
@@ -651,37 +651,38 @@ function za(a, c) {
   }
   return e;
 }
-;function W(a, c, b) {
+;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;
+    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 e = [];
-  for (let d = 0, f, g; d < a.length; d++) {
-    if ((f = a[d]) && (g = f.length)) {
+  let d = [];
+  for (let f = 0, g, k; f < a.length; f++) {
+    if ((g = a[f]) && (k = g.length)) {
       if (b) {
-        if (b >= g) {
-          b -= g;
+        if (b >= k) {
+          b -= k;
           continue;
         }
-        b < g && (f = c ? f.slice(b, b + c) : f.slice(b), g = f.length, b = 0);
+        b < k && (g = c ? g.slice(b, b + c) : g.slice(b), k = g.length, b = 0);
       }
-      g > c && (f = f.slice(0, c), g = c);
-      if (!e.length && g >= c) {
-        return f;
+      k > c && (g = g.slice(0, c), k = c);
+      if (!d.length && k >= c) {
+        return e ? W.call(this, g) : g;
       }
-      e.push(f);
-      c -= g;
+      d.push(g);
+      c -= k;
       if (!c) {
         break;
       }
     }
   }
-  return e = 1 < e.length ? [].concat.apply([], e) : e[0];
+  d = 1 < d.length ? [].concat.apply([], d) : d[0];
+  return e ? W.call(this, d) : d;
 }
-;function Aa(a, c, b) {
+;function Ba(a, c, b) {
   var e = b[0];
   if (e.then) {
     return Promise.all(b).then(function(m) {
@@ -728,10 +729,10 @@ function za(a, c) {
   return {O:e, P:d, limit:f, offset:g, enrich:k, resolve:h, suggest:l};
 }
 ;X.prototype.or = function() {
-  const {O:a, P:c, limit:b, offset:e, enrich:d, resolve:f} = Aa(this, "or", arguments);
-  return Ba.call(this, a, c, b, e, d, f);
+  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 Ba(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(k) {
@@ -739,7 +740,7 @@ function Ba(a, c, b, e, d, f) {
       for (let h = 0, l; h < k.length; h++) {
         (l = k[h]).length && (a[h] = l);
       }
-      return Ba.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 = ya(a, b, e), e = 0));
@@ -752,20 +753,20 @@ function Ba(a, c, b, e, d, f) {
     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:k, offset:h, enrich:l, resolve:m, suggest:n} = Aa(this, "and", arguments);
-    return Ca.call(this, f, g, k, h, l, m, n);
+    const {O:f, P:g, limit:k, offset:h, enrich:l, resolve:m, suggest:n} = Ba(this, "and", arguments);
+    return Da.call(this, f, g, k, h, l, m, n);
   }
   return d ? this.resolve(c, b, e) : this;
 };
-function Ca(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(l) {
+    const k = this;
+    return Promise.all(c).then(function(h) {
       a = [];
-      for (let m = 0, n; m < l.length; m++) {
-        (n = l[m]).length && (a[m] = n);
+      for (let l = 0, m; l < h.length; l++) {
+        (m = h[l]).length && (a[l] = m);
       }
-      return Ca.call(h, a, [], b, e, d, f, g);
+      return Da.call(k, a, [], b, e, d, f, g);
     });
   }
   if (a.length) {
@@ -773,10 +774,7 @@ function Ca(a, c, b, e, d, f, g) {
       this.result = a[0];
     } else {
       if (c = aa(a)) {
-        this.result = xa(a, c, b, e, g);
-        var k;
-        f ? d ? k = this.result : k = this.result : k = this;
-        return k;
+        return this.result = xa(a, c, b, e, g), f ? d ? W.call(this.index, this.result) : this.result : this;
       }
       this.result = [];
     }
@@ -786,40 +784,32 @@ function Ca(a, c, b, e, d, f, g) {
   return f ? this.resolve(b, e, d) : this;
 }
 ;X.prototype.xor = function() {
-  const {O:a, P:c, limit:b, offset:e, enrich:d, resolve:f, suggest:g} = Aa(this, "xor", arguments);
-  return Da.call(this, a, c, b, e, d, f, g);
+  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 Da(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(l) {
+    const k = this;
+    return Promise.all(c).then(function(h) {
       a = [];
-      for (let m = 0, n; m < l.length; m++) {
-        (n = l[m]).length && (a[m] = n);
+      for (let l = 0, m; l < h.length; l++) {
+        (m = h[l]).length && (a[l] = m);
       }
-      return Da.call(h, a, [], b, e, d, f, g);
+      return Ea.call(k, 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 {
-      this.result = Ea.call(this, a, b, e, f, this.h);
-      if (f) {
-        var k;
-        d ? k = this.result : k = this.result;
-        c = k;
-      } else {
-        c = this;
-      }
-      return c;
+      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 Ea(a, c, b, e, d) {
+function Fa(a, c, b, e, d) {
   const f = [], g = C();
   let k = 0;
   for (let h = 0, l; h < a.length; h++) {
@@ -865,35 +855,28 @@ function Ea(a, c, b, e, d) {
   return f;
 }
 ;X.prototype.not = function() {
-  const {O:a, P:c, limit:b, offset:e, enrich:d, resolve:f, suggest:g} = Aa(this, "not", arguments);
-  return Fa.call(this, a, c, b, e, d, f, g);
+  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 Fa(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(l) {
+    const k = this;
+    return Promise.all(c).then(function(h) {
       a = [];
-      for (let m = 0, n; m < l.length; m++) {
-        (n = l[m]).length && (a[m] = n);
+      for (let l = 0, m; l < h.length; l++) {
+        (m = h[l]).length && (a[l] = m);
       }
-      return Fa.call(h, a, [], b, e, d, f, g);
+      return Ga.call(k, a, [], b, e, d, f, g);
     });
   }
   if (a.length && this.result.length) {
-    this.result = Ga.call(this, a, b, e, f);
+    this.result = Ha.call(this, a, b, e, f);
   } else if (f) {
     return this.resolve(b, e, d);
   }
-  if (f) {
-    var k;
-    d ? k = this.result : k = this.result;
-    c = k;
-  } else {
-    c = this;
-  }
-  return c;
+  return f ? d ? W.call(this.index, this.result) : this.result : this;
 }
-function Ga(a, c, b, e) {
+function Ha(a, c, b, e) {
   const d = [];
   a = new Set(a.flat().flat());
   for (let f = 0, g, k = 0; f < this.result.length; f++) {
@@ -965,10 +948,10 @@ X.prototype.boost = function(a) {
   this.h += a;
   return this;
 };
-X.prototype.resolve = function(a, c) {
-  const b = this.result, e = this.index;
+X.prototype.resolve = function(a, c, b) {
+  const e = this.result, d = this.index;
   this.result = this.index = null;
-  return b.length ? ("object" === typeof a && (c = a.offset, a = a.limit), W.call(e, b, a || 100, c)) : b;
+  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();
 V.prototype.search = function(a, c, b, e) {
@@ -1030,7 +1013,7 @@ V.prototype.search = function(a, c, b, e) {
         f = [];
         if (u.length) {
           for (p = 0; p < u.length; p += 2) {
-            q = Ha.call(this, u[p], u[p + 1], c, t), d.push({field:u[p], tag:u[p + 1], result:q});
+            q = Ia.call(this, u[p], u[p + 1], c, t, g), d.push({field:u[p], tag:u[p + 1], result:q});
           }
         }
         return f.length ? Promise.all(f).then(function(y) {
@@ -1064,7 +1047,7 @@ V.prototype.search = function(a, c, b, e) {
     if (l && F) {
       w = [];
       z = 0;
-      for (let G = 0, H, Ya; G < l.length; G += 2) {
+      for (let G = 0, H, Za; G < l.length; G += 2) {
         H = this.tag.get(l[G]);
         if (!H) {
           if (console.warn("Tag '" + l[G] + ":" + l[G + 1] + "' will be skipped because there is no field '" + l[G] + "'."), k) {
@@ -1073,7 +1056,7 @@ V.prototype.search = function(a, c, b, e) {
             return n ? d : new X(d);
           }
         }
-        if (Ya = (H = H && H.get(l[G + 1])) && H.length) {
+        if (Za = (H = H && H.get(l[G + 1])) && H.length) {
           z++, w.push(H);
         } else if (!k) {
           return n ? d : new X(d);
@@ -1109,14 +1092,15 @@ V.prototype.search = function(a, c, b, e) {
   u = [];
   for (t = 0; t < f.length; t++) {
     e = d[t];
+    g && e.length && "undefined" === typeof e[0].doc && (e = W.call(this, e));
     if (p) {
       return n ? e : new X(e);
     }
     d[t] = {field:f[t], result:e};
   }
-  return q ? Ia(d, c) : r ? Ja(d, a, this.index, this.field, this.C, r) : d;
+  return q ? Ja(d, c) : r ? Ka(d, a, this.index, this.field, this.C, r) : d;
 };
-function Ja(a, c, b, e, d, f) {
+function Ka(a, c, b, e, d, f) {
   let g, k, h;
   for (let m = 0, n, r, p, q; m < a.length; m++) {
     let t = a[m].result;
@@ -1158,7 +1142,7 @@ function Ja(a, c, b, e, d, f) {
   }
   return a;
 }
-function Ia(a, c) {
+function Ja(a, c) {
   const b = [], e = C();
   for (let d = 0, f, g; d < a.length; d++) {
     f = a[d];
@@ -1177,18 +1161,29 @@ function Ia(a, c) {
   }
   return b;
 }
-function Ha(a, c, b, e) {
-  let d = this.tag.get(a);
-  if (!d) {
+function Ia(a, c, b, e, d) {
+  let f = this.tag.get(a);
+  if (!f) {
     return console.warn("Tag '" + a + "' was not found"), [];
   }
-  if ((a = (d = d && d.get(c)) && d.length - e) && 0 < a) {
+  if ((a = (f = f && f.get(c)) && f.length - e) && 0 < a) {
     if (a > b || e) {
-      d = d.slice(e, e + b);
+      f = f.slice(e, e + b);
     }
-    return d;
+    d && (f = W.call(this, f));
+    return f;
   }
 }
+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);
@@ -1198,7 +1193,7 @@ function Ha(a, c, b, e) {
   this.C = [];
   this.field = [];
   this.J = [];
-  this.key = (b = c.key || c.id) && Ka(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();
@@ -1209,13 +1204,13 @@ function Ha(a, c, b, e) {
   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 = I(g) ? Object.assign({}, a, g) : a, b.set(f, new O(g, this.reg)), g.custom ? this.C[d] = g.custom : (this.C[d] = Ka(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 = I(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;
     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] = Ka(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;
@@ -1231,14 +1226,14 @@ function Ha(a, c, b, e) {
         if (!g) {
           throw Error("The tag field from the document descriptor is undefined.");
         }
-        f.custom ? this.B[d] = f.custom : (this.B[d] = Ka(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 Ka(a, c) {
+function La(a, c) {
   const b = a.split(":");
   let e = 0;
   for (let d = 0; d < b.length; d++) {
@@ -1306,7 +1301,7 @@ x.set = function(a, c) {
   this.store.set(a, c);
   return this;
 };
-x.searchCache = La;
+x.searchCache = Ma;
 x.export = function(a, c, b = 0, e = 0) {
   if (b < this.field.length) {
     const g = this.field[b];
@@ -1367,7 +1362,7 @@ x.import = function(a, c) {
   }
 };
 ja(V.prototype);
-function La(a, c, b) {
+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);
@@ -1408,31 +1403,31 @@ Y.prototype.clear = function() {
   this.cache.clear();
   this.h = "";
 };
-const Ma = {normalize:function(a) {
+const Na = {normalize:function(a) {
   return a.toLowerCase();
 }};
-const Na = 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 Oa = new Map([["ae", "a"], ["oe", "o"], ["sh", "s"], ["kh", "k"], ["th", "t"], ["ph", "f"], ["pf", "f"]]), Pa = [/([^aeo])h(.)/g, "$1$2", /([aeo])h([^aeo]|$)/g, "$1$2", /(.)\1+/g, "$1"];
-const Qa = {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 Ra = /[\x00-\x7F]+/g;
+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"], ["ph", "f"], ["pf", "f"]]), Qa = [/([^aeo])h(.)/g, "$1$2", /([aeo])h([^aeo]|$)/g, "$1$2", /(.)\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;
-var Ua = {LatinExact:{split:/\s+/, normalize:!1}, LatinDefault:Ma, LatinSimple:{normalize:!0, dedupe:!0}, LatinBalance:{normalize:!0, dedupe:!0, mapper:Na}, LatinAdvanced:{normalize:!0, dedupe:!0, mapper:Na, matcher:Oa, replacer:Pa}, LatinExtra:{normalize:!0, dedupe:!0, mapper:Na, replacer:Pa.concat([/(?!^)[aeo]/g, ""]), matcher:Oa}, LatinSoundex:{normalize:!0, dedupe:!1, include:{letter:!0}, finalize:function(a) {
+const Ua = /[\x00-\x7F]+/g;
+var Va = {LatinExact:{split:/\s+/, normalize:!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 = Qa[e];
-    for (let f = 1, g; f < c.length && (g = c.charAt(f), "h" === g || "w" === g || !(g = Qa[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:{normalize:!1, dedupe:!0, prepare:function(a) {
-  return ("" + a).replace(Ra, " ");
+  return ("" + a).replace(Sa, " ");
 }}, CjkDefault:{normalize:!1, dedupe:!0, split:"", prepare:function(a) {
-  return ("" + a).replace(Sa, "");
+  return ("" + a).replace(Ta, "");
 }}, CyrillicDefault:{normalize:!1, dedupe:!0, prepare:function(a) {
-  return ("" + a).replace(Ta, " ");
+  return ("" + a).replace(Ua, " ");
 }}};
-const Va = {memory:{resolution:1}, performance:{resolution:3, fastupdate:!0, context:{depth:1, resolution:1}}, match:{tokenize:"forward"}, score:{resolution:9, context:{depth:2, resolution:3}}};
+const Wa = {memory:{resolution:1}, performance:{resolution:3, fastupdate:!0, context:{depth:1, resolution:1}}, match:{tokenize:"forward"}, score:{resolution:9, context:{depth:2, resolution:3}}};
 O.prototype.add = function(a, c, b, e) {
   if (c && (a || 0 === a)) {
     if (!e && !b && this.reg.has(a)) {
@@ -1445,7 +1440,7 @@ O.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) : Wa(r, e, p), g = "";
+          var f = this.score ? this.score(c, q, p, null, 0) : Xa(r, e, p), g = "";
           switch(this.tokenize) {
             case "full":
               if (2 < d) {
@@ -1453,7 +1448,7 @@ O.prototype.add = function(a, c, b, e) {
                   for (f = d; f > t; f--) {
                     g = q.substring(t, f);
                     u = this.rtl ? d - 1 - t : t;
-                    var k = this.score ? this.score(c, q, p, g, u) : Wa(r, e, p, d, u);
+                    var k = this.score ? this.score(c, q, p, g, u) : Xa(r, e, p, d, u);
                     Z(this, m, g, k, a, b);
                   }
                 }
@@ -1463,7 +1458,7 @@ O.prototype.add = function(a, c, b, e) {
               if (1 < d) {
                 for (k = d - 1; 0 < k; k--) {
                   g = q[this.rtl ? d - 1 - k : k] + g;
-                  var h = this.score ? this.score(c, q, p, g, k) : Wa(r, e, p, d, k);
+                  var h = this.score ? this.score(c, q, p, g, k) : Xa(r, e, p, d, k);
                   Z(this, m, g, h, a, b);
                 }
                 g = "";
@@ -1480,7 +1475,7 @@ O.prototype.add = function(a, c, b, e) {
                 for (d = C(), g = this.S, f = q, k = Math.min(n + 1, this.rtl ? p + 1 : e - p), d[f] = 1, h = 1; h < k; h++) {
                   if ((q = c[this.rtl ? e - 1 - p - h : p + h]) && !d[q]) {
                     d[q] = 1;
-                    const t = this.score ? this.score(c, f, p, q, h - 1) : Wa(g + (e / 2 > g ? 0 : 1), e, p, k - 1, h - 1), u = this.bidirectional && q > f;
+                    const t = this.score ? this.score(c, f, p, q, h - 1) : Xa(g + (e / 2 > g ? 0 : 1), e, p, k - 1, h - 1), u = this.bidirectional && q > f;
                     Z(this, l, u ? f : q, t, a, b, u ? q : f);
                   }
                 }
@@ -1499,7 +1494,7 @@ function Z(a, c, b, e, d, f, g) {
     g ? (c = h || (c[b] = C()), c[g] = 1, (h = k.get(g)) ? k = h : k.set(g, k = new Map())) : c[b] = 1, (h = k.get(b)) ? k = h : k.set(b, k = []), k = k[e] || (k[e] = []), f && k.includes(d) || (k.push(d), a.fastupdate && ((c = a.reg.get(d)) ? c.push(k) : a.reg.set(d, [k])));
   }
 }
-function Wa(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;
 }
 ;O.prototype.search = function(a, c, b) {
@@ -1520,11 +1515,11 @@ function Wa(a, c, b, e, d) {
   b = a.length;
   c = c || (k ? 100 : 0);
   if (1 === b) {
-    return g = c, (c = Xa(this, a[0], "")) && c.length ? W.call(this, c, g, d) : [];
+    return g = c, (c = Ya(this, a[0], "")) && c.length ? Aa.call(this, c, g, d) : [];
   }
   f = this.depth && !1 !== f;
   if (2 === b && f && !g) {
-    return g = c, (c = Xa(this, a[0], a[1])) && c.length ? W.call(this, c, g, d) : [];
+    return g = c, (c = Ya(this, a[0], a[1])) && c.length ? Aa.call(this, c, g, d) : [];
   }
   k = C();
   let l = 0;
@@ -1536,7 +1531,7 @@ function Wa(a, c, b, e, d) {
   for (let q, t; l < b; l++) {
     if ((t = a[l]) && !k[t]) {
       k[t] = 1;
-      q = Xa(this, t, m);
+      q = Ya(this, t, m);
       a: {
         f = q;
         var n = e, r = g, p = h;
@@ -1575,14 +1570,14 @@ function Wa(a, c, b, e, d) {
     if (1 < e) {
       m = xa(a, h, c, d, g);
     } else if (1 === e) {
-      g = W.call(null, a[0], c, d);
+      g = Aa.call(null, a[0], c, d);
       break a;
     }
     g = m;
   }
   return g;
 };
-function Xa(a, c, b) {
+function Ya(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);
@@ -1603,14 +1598,14 @@ function Xa(a, c, b) {
         }
       }
     } else {
-      Za(this.map, a), this.depth && Za(this.ctx, a);
+      $a(this.map, a), this.depth && $a(this.ctx, a);
     }
     c || this.reg.delete(a);
   }
   this.cache && this.cache.remove(a);
   return this;
 };
-function Za(a, c) {
+function $a(a, c) {
   let b = 0;
   if (a.constructor === Array) {
     for (let e = 0, d, f; e < a.length; e++) {
@@ -1625,7 +1620,7 @@ function Za(a, c) {
     }
   } else {
     for (let e of a.entries()) {
-      const d = e[0], f = Za(e[1], c);
+      const d = e[0], f = $a(e[1], c);
       f ? b += f : a.delete(d);
     }
   }
@@ -1637,12 +1632,12 @@ function Za(a, c) {
   }
   if (a) {
     var b = D(a) ? a : a.preset;
-    b && (Va[b] || console.warn("Preset not found: " + b), a = Object.assign({}, Va[b], a));
+    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 = D(a.encoder) ? Ua[a.encoder] : a.encode || a.encoder || Ma;
+  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 = (b = a.tokenize) && "default" !== b && b || "strict";
@@ -1678,7 +1673,7 @@ x.update = function(a, c) {
   const b = this, e = this.remove(a);
   return e && e.then ? e.then(() => b.add(a, c)) : this.add(a, c);
 };
-function $a(a) {
+function ab(a) {
   let c = 0;
   if (a.constructor === Array) {
     for (let b = 0, e; b < a.length; b++) {
@@ -1686,7 +1681,7 @@ function $a(a) {
     }
   } else {
     for (const b of a.entries()) {
-      const e = b[0], d = $a(b[1]);
+      const e = b[0], d = ab(b[1]);
       d ? c += d : a.delete(e);
     }
   }
@@ -1696,11 +1691,11 @@ x.cleanup = function() {
   if (!this.fastupdate) {
     return console.info('Cleanup the index isn\'t required when not using "fastupdate".'), this;
   }
-  $a(this.map);
-  this.depth && $a(this.ctx);
+  ab(this.map);
+  this.depth && ab(this.ctx);
   return this;
 };
-x.searchCache = La;
+x.searchCache = Ma;
 x.export = function(a, c, b = 0, e = 0) {
   let d, f;
   switch(e) {
@@ -1763,9 +1758,9 @@ x.serialize = function(a = !0) {
 };
 ja(O.prototype);
 C();
-const ab = {Index:O, Charset:Ua, Encoder:K, Document:V, Worker:null, Resolver:null, IndexedDB:null, Language:{}}, bb = "undefined" !== typeof global ? global : self;
-let cb;
-(cb = bb.define) && cb.amd ? cb([], function() {
-  return ab;
-}) : "object" === typeof bb.exports ? bb.exports = ab : bb.FlexSearch = ab;
+const bb = {Index:O, Charset:Va, Encoder:K, Document:V, Worker:null, Resolver:null, IndexedDB:null, Language:{}}, cb = "undefined" !== typeof self ? self : "undefined" !== typeof global ? global : self;
+let db;
+(db = cb.define) && db.amd ? db([], function() {
+  return bb;
+}) : "object" === typeof cb.exports ? cb.exports = bb : cb.FlexSearch = bb;
 }(this||self));
diff --git a/dist/flexsearch.compact.min.js b/dist/flexsearch.compact.min.js
index b8aa8c2..b351195 100644
--- a/dist/flexsearch.compact.min.js
+++ b/dist/flexsearch.compact.min.js
@@ -1,5 +1,5 @@
 /**!
- * FlexSearch.js v0.8.135 (Bundle)
+ * FlexSearch.js v0.8.138 (Bundle)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
@@ -35,37 +35,36 @@ function ua(a,c){let b="";for(const e of a.entries()){a=e[0];const d=e[1];let f=
 f.I;if(g&&!g(c))continue;f.constructor===String&&(f=""+f);f=I(c,f)}if(d&&f){D(f)&&(f=[f]);for(let h=0,l,m;h<f.length;h++)l=f[h],k[l]||(k[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]))))}}if(this.store&&(!b||!this.store.has(a))){let k;if(this.A){k=C();for(let h=0,l;h<this.A.length;h++){l=this.A[h];if((b=l.I)&&!b(c))continue;let m;if("function"===typeof l){m=l(c);if(!m)continue;l=[l.U]}else if(D(l)||l.constructor===
 String){k[l]=c[l];continue}wa(c,k,l,0,l[0],m)}}this.store.set(a,k||c)}}return this};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++)wa(a,c,b,e,d);else c=c[d]||(c[d]=C()),d=b[++e],wa(a,c,b,e,d)}
 function va(a,c,b,e,d,f,g,k){if(a=a[g])if(e===c.length-1){if(a.constructor===Array){if(b[e]){for(c=0;c<a.length;c++)d.add(f,a[c],!0,!0);return}a=a.join(" ")}d.add(f,a,k,!0)}else if(a.constructor===Array)for(g=0;g<a.length;g++)va(a,c,b,e,d,f,g,k);else g=c[++e],va(a,c,b,e,d,f,g,k)};function xa(a,c,b,e,d){const f=a.length;let g=[],k,h;k=C();for(let l=0,m,n,r,p;l<c;l++)for(let q=0;q<f;q++)if(r=a[q],l<r.length&&(m=r[l]))for(let t=0;t<m.length;t++)if(n=m[t],(h=k[n])?k[n]++:(h=0,k[n]=1),p=g[h]||(g[h]=[]),p.push(n),b&&h===f-1&&p.length-e===b)return p;if(a=g.length)if(d)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[];g=g[a-1];if(b||e)if(g.length>b||e)g=g.slice(e,b+e)}return g}
-function ya(a,c,b){const e=[],d=C();let f;var g=a.length;let k;for(let h=g-1;0<=h;h--)if(k=(g=a[h])&&g.length)for(let l=0;l<k;l++)if(f=g[l],!d[f])if(d[f]=1,b)b--;else if(e.push(f),e.length===c)return e;return e}function za(a,c){const b=C(),e=[];for(let d=0,f;d<c.length;d++){f=c[d];for(let g=0;g<f.length;g++)b[f[g]]=1}for(let d=0,f;d<a.length;d++)f=a[d],b[f]&&(e.push(f),b[f]=0);return e};function W(a,c,b){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;let e=[];for(let d=0,f,g;d<a.length;d++)if((f=a[d])&&(g=f.length)){if(b){if(b>=g){b-=g;continue}b<g&&(f=c?f.slice(b,b+c):f.slice(b),g=f.length,b=0)}g>c&&(f=f.slice(0,c),g=c);if(!e.length&&g>=c)return f;e.push(f);c-=g;if(!c)break}return e=1<e.length?[].concat.apply([],e):e[0]};function Aa(a,c,b){var e=b[0];if(e.then)return Promise.all(b).then(function(m){return a[c].apply(a,m)});if(e[0]&&e[0].index)return a[c].apply(a,e);e=[];let d=[],f=0,g=0,k,h,l;for(let m=0,n;m<b.length;m++)if(n=b[m]){let r;if(n.constructor===X)r=n.result;else if(n.constructor===Array)r=n;else if(f=n.limit||0,g=n.offset||0,l=n.suggest,h=n.resolve,k=n.enrich&&h,n.index)n.resolve=!1,r=n.index.search(n).result,n.resolve=h;else if(n.and)r=a.and(n.and);else if(n.or)r=a.or(n.or);else if(n.xor)r=a.xor(n.xor);
-else if(n.not)r=a.not(n.not);else continue;if(r.then)d.push(r);else if(r.length)e[m]=r;else if(!l&&("and"===c||"xor"===c)){e=[];break}}return{O:e,P:d,limit:f,offset:g,enrich:k,resolve:h,suggest:l}};X.prototype.or=function(){const {O:a,P:c,limit:b,offset:e,enrich:d,resolve:f}=Aa(this,"or",arguments);return Ba.call(this,a,c,b,e,d,f)};function Ba(a,c,b,e,d,f){if(c.length){const g=this;return Promise.all(c).then(function(k){a=[];for(let h=0,l;h<k.length;h++)(l=k[h]).length&&(a[h]=l);return Ba.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=ya(a,b,e),e=0));return f?this.resolve(b,e,d):this};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:k,offset:h,enrich:l,resolve:m,suggest:n}=Aa(this,"and",arguments);return Ca.call(this,f,g,k,h,l,m,n)}return d?this.resolve(c,b,e):this};
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+q>f;Z(this,l,u?f:q,t,a,b,u?q:f)}}}}this.fastupdate||this.reg.add(a)}}return this};function Z(a,c,b,e,d,f,g){let k=g?a.ctx:a.map,h;if(!c[b]||g&&!(h=c[b])[g])g?(c=h||(c[b]=C()),c[g]=1,(h=k.get(g))?k=h:k.set(g,k=new Map)):c[b]=1,(h=k.get(b))?k=h:k.set(b,k=[]),k=k[e]||(k[e]=[]),f&&k.includes(d)||(k.push(d),a.fastupdate&&((c=a.reg.get(d))?c.push(k):a.reg.set(d,[k])))}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 k=!0;var h=b.resolution}else k=!0;a=this.encoder.encode(a);b=a.length;c=c||(k?100:0);if(1===b)return g=c,(c=Za(this,a[0],""))&&c.length?Aa.call(this,c,g,d):[];f=this.depth&&!1!==f;if(2===b&&f&&!g)return g=c,(c=Za(this,a[0],a[1]))&&c.length?Aa.call(this,c,g,d):[];k=C();let l=0;if(1<b&&f){var m=a[0];l=1}h||0===h||(h=m?this.S:this.resolution);
+for(let q,t;l<b;l++){if((t=a[l])&&!k[t]){k[t]=1;q=Za(this,t,m);a:{f=q;var n=e,r=g,p=h;let u=[];if(f&&f.length){if(f.length<=p){n.push(f);q=void 0;break a}for(let w=0,z;w<p;w++)if(z=f[w])u[w]=z;if(u.length){n.push(u);q=void 0;break a}}q=r?void 0:u}if(q){e=q;break}m&&(g&&q&&e.length||(m=t))}g&&m&&l===b-1&&!e.length&&(h=this.resolution,m="",l=-1,k=C())}a:{a=e;e=a.length;m=a;if(1<e)m=xa(a,h,c,d,g);else if(1===e){g=Aa.call(null,a[0],c,d);break a}g=m}return g};
+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};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 $a(this.map,a),this.depth&&$a(this.ctx,a);c||this.reg.delete(a)}this.cache&&this.cache.remove(a);return this};
+function $a(a,c){let b=0;if(a.constructor===Array)for(let e=0,d,f;e<a.length;e++){if((d=a[e])&&d.length)if(f=d.indexOf(c),0<=f){1<d.length?(d.splice(f,1),b++):delete a[e];break}else b++}else for(let e of a.entries()){const d=e[0],f=$a(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=(b=a.tokenize)&&"default"!==b&&b||"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}x=O.prototype;x.clear=function(){this.map.clear();this.ctx.clear();this.reg.clear();this.cache&&this.cache.clear();return this};x.append=function(a,c){return this.add(a,c,!0)};x.contain=function(a){return this.reg.has(a)};
-x.update=function(a,c){const b=this,e=this.remove(a);return e&&e.then?e.then(()=>b.add(a,c)):this.add(a,c)};function $a(a){let c=0;if(a.constructor===Array)for(let b=0,e;b<a.length;b++)(e=a[b])&&(c+=e.length);else for(const b of a.entries()){const e=b[0],d=$a(b[1]);d?c+=d:a.delete(e)}return c}x.cleanup=function(){if(!this.fastupdate)return this;$a(this.map);this.depth&&$a(this.ctx);return this};x.searchCache=La;
+x.update=function(a,c){const b=this,e=this.remove(a);return e&&e.then?e.then(()=>b.add(a,c)):this.add(a,c)};function ab(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.entries()){const e=b[0],d=ab(b[1]);d?c+=d:a.delete(e)}return c}x.cleanup=function(){if(!this.fastupdate)return this;ab(this.map);this.depth&&ab(this.ctx);return this};x.searchCache=Ma;
 x.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 U.call(this,a,c,d,f,b,e)};
 x.import=function(a,c){if(c)switch("string"===typeof c&&(c=JSON.parse(c)),a=a.split("."),"json"===a[a.length-1]&&a.pop(),3===a.length&&a.shift(),a=1<a.length?a[1]:a[0],a){case "reg":this.fastupdate=!1;this.reg=ta(c,this.reg);break;case "map":this.map=pa(c,this.map);break;case "ctx":this.ctx=ra(c,this.ctx)}};
-x.serialize=function(a=!0){let c="",b="",e="";if(this.reg.size){let f;for(var d of this.reg.keys())f||(f=typeof d),c+=(c?",":"")+("string"===f?'"'+d+'"':d);c="index.reg=new Set(["+c+"]);";b=ua(this.map,f);b="index.map=new Map(["+b+"]);";for(const g of this.ctx.entries()){d=g[0];let k=ua(g[1],f);k="new Map(["+k+"])";k='["'+d+'",'+k+"]";e+=(e?",":"")+k}e="index.ctx=new Map(["+e+"]);"}return a?"function inject(index){"+c+b+e+"}":c+b+e};ja(O.prototype);C();const ab={Index:O,Charset:Ua,Encoder:K,Document:V,Worker:null,Resolver:null,IndexedDB:null,Language:{}},bb="undefined"!==typeof global?global:self;let cb;(cb=bb.define)&&cb.amd?cb([],function(){return ab}):"object"===typeof bb.exports?bb.exports=ab:bb.FlexSearch=ab;}(this||self));
+x.serialize=function(a=!0){let c="",b="",e="";if(this.reg.size){let f;for(var d of this.reg.keys())f||(f=typeof d),c+=(c?",":"")+("string"===f?'"'+d+'"':d);c="index.reg=new Set(["+c+"]);";b=ua(this.map,f);b="index.map=new Map(["+b+"]);";for(const g of this.ctx.entries()){d=g[0];let k=ua(g[1],f);k="new Map(["+k+"])";k='["'+d+'",'+k+"]";e+=(e?",":"")+k}e="index.ctx=new Map(["+e+"]);"}return a?"function inject(index){"+c+b+e+"}":c+b+e};ja(O.prototype);C();const bb={Index:O,Charset:Va,Encoder:K,Document:V,Worker:null,Resolver:null,IndexedDB:null,Language:{}},cb="undefined"!==typeof self?self:"undefined"!==typeof global?global:self;let db;(db=cb.define)&&db.amd?db([],function(){return bb}):"object"===typeof cb.exports?cb.exports=bb:cb.FlexSearch=bb;}(this||self));
diff --git a/dist/flexsearch.compact.module.debug.js b/dist/flexsearch.compact.module.debug.js
index 5aaadea..743f5a4 100644
--- a/dist/flexsearch.compact.module.debug.js
+++ b/dist/flexsearch.compact.module.debug.js
@@ -1,5 +1,5 @@
 /**!
- * FlexSearch.js v0.8.135 (Bundle/Debug)
+ * FlexSearch.js v0.8.138 (Bundle/Debug)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
@@ -650,37 +650,38 @@ function za(a, c) {
   }
   return e;
 }
-;function W(a, c, b) {
+;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;
+    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 e = [];
-  for (let d = 0, f, g; d < a.length; d++) {
-    if ((f = a[d]) && (g = f.length)) {
+  let d = [];
+  for (let f = 0, g, k; f < a.length; f++) {
+    if ((g = a[f]) && (k = g.length)) {
       if (b) {
-        if (b >= g) {
-          b -= g;
+        if (b >= k) {
+          b -= k;
           continue;
         }
-        b < g && (f = c ? f.slice(b, b + c) : f.slice(b), g = f.length, b = 0);
+        b < k && (g = c ? g.slice(b, b + c) : g.slice(b), k = g.length, b = 0);
       }
-      g > c && (f = f.slice(0, c), g = c);
-      if (!e.length && g >= c) {
-        return f;
+      k > c && (g = g.slice(0, c), k = c);
+      if (!d.length && k >= c) {
+        return e ? W.call(this, g) : g;
       }
-      e.push(f);
-      c -= g;
+      d.push(g);
+      c -= k;
       if (!c) {
         break;
       }
     }
   }
-  return e = 1 < e.length ? [].concat.apply([], e) : e[0];
+  d = 1 < d.length ? [].concat.apply([], d) : d[0];
+  return e ? W.call(this, d) : d;
 }
-;function Aa(a, c, b) {
+;function Ba(a, c, b) {
   var e = b[0];
   if (e.then) {
     return Promise.all(b).then(function(m) {
@@ -727,10 +728,10 @@ function za(a, c) {
   return {O:e, P:d, limit:f, offset:g, enrich:k, resolve:h, suggest:l};
 }
 ;X.prototype.or = function() {
-  const {O:a, P:c, limit:b, offset:e, enrich:d, resolve:f} = Aa(this, "or", arguments);
-  return Ba.call(this, a, c, b, e, d, f);
+  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 Ba(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(k) {
@@ -738,7 +739,7 @@ function Ba(a, c, b, e, d, f) {
       for (let h = 0, l; h < k.length; h++) {
         (l = k[h]).length && (a[h] = l);
       }
-      return Ba.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 = ya(a, b, e), e = 0));
@@ -751,20 +752,20 @@ function Ba(a, c, b, e, d, f) {
     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:k, offset:h, enrich:l, resolve:m, suggest:n} = Aa(this, "and", arguments);
-    return Ca.call(this, f, g, k, h, l, m, n);
+    const {O:f, P:g, limit:k, offset:h, enrich:l, resolve:m, suggest:n} = Ba(this, "and", arguments);
+    return Da.call(this, f, g, k, h, l, m, n);
   }
   return d ? this.resolve(c, b, e) : this;
 };
-function Ca(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(l) {
+    const k = this;
+    return Promise.all(c).then(function(h) {
       a = [];
-      for (let m = 0, n; m < l.length; m++) {
-        (n = l[m]).length && (a[m] = n);
+      for (let l = 0, m; l < h.length; l++) {
+        (m = h[l]).length && (a[l] = m);
       }
-      return Ca.call(h, a, [], b, e, d, f, g);
+      return Da.call(k, a, [], b, e, d, f, g);
     });
   }
   if (a.length) {
@@ -772,10 +773,7 @@ function Ca(a, c, b, e, d, f, g) {
       this.result = a[0];
     } else {
       if (c = aa(a)) {
-        this.result = xa(a, c, b, e, g);
-        var k;
-        f ? d ? k = this.result : k = this.result : k = this;
-        return k;
+        return this.result = xa(a, c, b, e, g), f ? d ? W.call(this.index, this.result) : this.result : this;
       }
       this.result = [];
     }
@@ -785,40 +783,32 @@ function Ca(a, c, b, e, d, f, g) {
   return f ? this.resolve(b, e, d) : this;
 }
 ;X.prototype.xor = function() {
-  const {O:a, P:c, limit:b, offset:e, enrich:d, resolve:f, suggest:g} = Aa(this, "xor", arguments);
-  return Da.call(this, a, c, b, e, d, f, g);
+  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 Da(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(l) {
+    const k = this;
+    return Promise.all(c).then(function(h) {
       a = [];
-      for (let m = 0, n; m < l.length; m++) {
-        (n = l[m]).length && (a[m] = n);
+      for (let l = 0, m; l < h.length; l++) {
+        (m = h[l]).length && (a[l] = m);
       }
-      return Da.call(h, a, [], b, e, d, f, g);
+      return Ea.call(k, 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 {
-      this.result = Ea.call(this, a, b, e, f, this.h);
-      if (f) {
-        var k;
-        d ? k = this.result : k = this.result;
-        c = k;
-      } else {
-        c = this;
-      }
-      return c;
+      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 Ea(a, c, b, e, d) {
+function Fa(a, c, b, e, d) {
   const f = [], g = C();
   let k = 0;
   for (let h = 0, l; h < a.length; h++) {
@@ -864,35 +854,28 @@ function Ea(a, c, b, e, d) {
   return f;
 }
 ;X.prototype.not = function() {
-  const {O:a, P:c, limit:b, offset:e, enrich:d, resolve:f, suggest:g} = Aa(this, "not", arguments);
-  return Fa.call(this, a, c, b, e, d, f, g);
+  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 Fa(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(l) {
+    const k = this;
+    return Promise.all(c).then(function(h) {
       a = [];
-      for (let m = 0, n; m < l.length; m++) {
-        (n = l[m]).length && (a[m] = n);
+      for (let l = 0, m; l < h.length; l++) {
+        (m = h[l]).length && (a[l] = m);
       }
-      return Fa.call(h, a, [], b, e, d, f, g);
+      return Ga.call(k, a, [], b, e, d, f, g);
     });
   }
   if (a.length && this.result.length) {
-    this.result = Ga.call(this, a, b, e, f);
+    this.result = Ha.call(this, a, b, e, f);
   } else if (f) {
     return this.resolve(b, e, d);
   }
-  if (f) {
-    var k;
-    d ? k = this.result : k = this.result;
-    c = k;
-  } else {
-    c = this;
-  }
-  return c;
+  return f ? d ? W.call(this.index, this.result) : this.result : this;
 }
-function Ga(a, c, b, e) {
+function Ha(a, c, b, e) {
   const d = [];
   a = new Set(a.flat().flat());
   for (let f = 0, g, k = 0; f < this.result.length; f++) {
@@ -964,10 +947,10 @@ X.prototype.boost = function(a) {
   this.h += a;
   return this;
 };
-X.prototype.resolve = function(a, c) {
-  const b = this.result, e = this.index;
+X.prototype.resolve = function(a, c, b) {
+  const e = this.result, d = this.index;
   this.result = this.index = null;
-  return b.length ? ("object" === typeof a && (c = a.offset, a = a.limit), W.call(e, b, a || 100, c)) : b;
+  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();
 V.prototype.search = function(a, c, b, e) {
@@ -1029,7 +1012,7 @@ V.prototype.search = function(a, c, b, e) {
         f = [];
         if (u.length) {
           for (p = 0; p < u.length; p += 2) {
-            q = Ha.call(this, u[p], u[p + 1], c, t), d.push({field:u[p], tag:u[p + 1], result:q});
+            q = Ia.call(this, u[p], u[p + 1], c, t, g), d.push({field:u[p], tag:u[p + 1], result:q});
           }
         }
         return f.length ? Promise.all(f).then(function(y) {
@@ -1063,7 +1046,7 @@ V.prototype.search = function(a, c, b, e) {
     if (l && F) {
       w = [];
       z = 0;
-      for (let G = 0, H, Va; G < l.length; G += 2) {
+      for (let G = 0, H, Wa; G < l.length; G += 2) {
         H = this.tag.get(l[G]);
         if (!H) {
           if (console.warn("Tag '" + l[G] + ":" + l[G + 1] + "' will be skipped because there is no field '" + l[G] + "'."), k) {
@@ -1072,7 +1055,7 @@ V.prototype.search = function(a, c, b, e) {
             return n ? d : new X(d);
           }
         }
-        if (Va = (H = H && H.get(l[G + 1])) && H.length) {
+        if (Wa = (H = H && H.get(l[G + 1])) && H.length) {
           z++, w.push(H);
         } else if (!k) {
           return n ? d : new X(d);
@@ -1108,14 +1091,15 @@ V.prototype.search = function(a, c, b, e) {
   u = [];
   for (t = 0; t < f.length; t++) {
     e = d[t];
+    g && e.length && "undefined" === typeof e[0].doc && (e = W.call(this, e));
     if (p) {
       return n ? e : new X(e);
     }
     d[t] = {field:f[t], result:e};
   }
-  return q ? Ia(d, c) : r ? Ja(d, a, this.index, this.field, this.C, r) : d;
+  return q ? Ja(d, c) : r ? Ka(d, a, this.index, this.field, this.C, r) : d;
 };
-function Ja(a, c, b, e, d, f) {
+function Ka(a, c, b, e, d, f) {
   let g, k, h;
   for (let m = 0, n, r, p, q; m < a.length; m++) {
     let t = a[m].result;
@@ -1157,7 +1141,7 @@ function Ja(a, c, b, e, d, f) {
   }
   return a;
 }
-function Ia(a, c) {
+function Ja(a, c) {
   const b = [], e = C();
   for (let d = 0, f, g; d < a.length; d++) {
     f = a[d];
@@ -1176,18 +1160,29 @@ function Ia(a, c) {
   }
   return b;
 }
-function Ha(a, c, b, e) {
-  let d = this.tag.get(a);
-  if (!d) {
+function Ia(a, c, b, e, d) {
+  let f = this.tag.get(a);
+  if (!f) {
     return console.warn("Tag '" + a + "' was not found"), [];
   }
-  if ((a = (d = d && d.get(c)) && d.length - e) && 0 < a) {
+  if ((a = (f = f && f.get(c)) && f.length - e) && 0 < a) {
     if (a > b || e) {
-      d = d.slice(e, e + b);
+      f = f.slice(e, e + b);
     }
-    return d;
+    d && (f = W.call(this, f));
+    return f;
   }
 }
+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);
@@ -1197,7 +1192,7 @@ function Ha(a, c, b, e) {
   this.C = [];
   this.field = [];
   this.J = [];
-  this.key = (b = c.key || c.id) && Ka(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();
@@ -1208,13 +1203,13 @@ function Ha(a, c, b, e) {
   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 = I(g) ? Object.assign({}, a, g) : a, b.set(f, new O(g, this.reg)), g.custom ? this.C[d] = g.custom : (this.C[d] = Ka(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 = I(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;
     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] = Ka(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;
@@ -1230,14 +1225,14 @@ function Ha(a, c, b, e) {
         if (!g) {
           throw Error("The tag field from the document descriptor is undefined.");
         }
-        f.custom ? this.B[d] = f.custom : (this.B[d] = Ka(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 Ka(a, c) {
+function La(a, c) {
   const b = a.split(":");
   let e = 0;
   for (let d = 0; d < b.length; d++) {
@@ -1305,7 +1300,7 @@ x.set = function(a, c) {
   this.store.set(a, c);
   return this;
 };
-x.searchCache = La;
+x.searchCache = Ma;
 x.export = function(a, c, b = 0, e = 0) {
   if (b < this.field.length) {
     const g = this.field[b];
@@ -1366,7 +1361,7 @@ x.import = function(a, c) {
   }
 };
 ja(V.prototype);
-function La(a, c, b) {
+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);
@@ -1407,31 +1402,31 @@ Y.prototype.clear = function() {
   this.cache.clear();
   this.h = "";
 };
-const Ma = {normalize:function(a) {
+const Na = {normalize:function(a) {
   return a.toLowerCase();
 }};
-const Na = 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 Oa = new Map([["ae", "a"], ["oe", "o"], ["sh", "s"], ["kh", "k"], ["th", "t"], ["ph", "f"], ["pf", "f"]]), Pa = [/([^aeo])h(.)/g, "$1$2", /([aeo])h([^aeo]|$)/g, "$1$2", /(.)\1+/g, "$1"];
-const Qa = {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 Ra = /[\x00-\x7F]+/g;
+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"], ["ph", "f"], ["pf", "f"]]), Qa = [/([^aeo])h(.)/g, "$1$2", /([aeo])h([^aeo]|$)/g, "$1$2", /(.)\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;
-var Ua = {LatinExact:{split:/\s+/, normalize:!1}, LatinDefault:Ma, LatinSimple:{normalize:!0, dedupe:!0}, LatinBalance:{normalize:!0, dedupe:!0, mapper:Na}, LatinAdvanced:{normalize:!0, dedupe:!0, mapper:Na, matcher:Oa, replacer:Pa}, LatinExtra:{normalize:!0, dedupe:!0, mapper:Na, replacer:Pa.concat([/(?!^)[aeo]/g, ""]), matcher:Oa}, LatinSoundex:{normalize:!0, dedupe:!1, include:{letter:!0}, finalize:function(a) {
+const Ua = /[\x00-\x7F]+/g;
+var Va = {LatinExact:{split:/\s+/, normalize:!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 = Qa[e];
-    for (let f = 1, g; f < c.length && (g = c.charAt(f), "h" === g || "w" === g || !(g = Qa[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:{normalize:!1, dedupe:!0, prepare:function(a) {
-  return ("" + a).replace(Ra, " ");
+  return ("" + a).replace(Sa, " ");
 }}, CjkDefault:{normalize:!1, dedupe:!0, split:"", prepare:function(a) {
-  return ("" + a).replace(Sa, "");
+  return ("" + a).replace(Ta, "");
 }}, CyrillicDefault:{normalize:!1, dedupe:!0, prepare:function(a) {
-  return ("" + a).replace(Ta, " ");
+  return ("" + a).replace(Ua, " ");
 }}};
-const Wa = {memory:{resolution:1}, performance:{resolution:3, fastupdate:!0, context:{depth:1, resolution:1}}, match:{tokenize:"forward"}, score:{resolution:9, context:{depth:2, resolution:3}}};
+const Xa = {memory:{resolution:1}, performance:{resolution:3, fastupdate:!0, context:{depth:1, resolution:1}}, match:{tokenize:"forward"}, score:{resolution:9, context:{depth:2, resolution:3}}};
 O.prototype.add = function(a, c, b, e) {
   if (c && (a || 0 === a)) {
     if (!e && !b && this.reg.has(a)) {
@@ -1444,7 +1439,7 @@ O.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) : Xa(r, e, p), g = "";
+          var f = this.score ? this.score(c, q, p, null, 0) : Ya(r, e, p), g = "";
           switch(this.tokenize) {
             case "full":
               if (2 < d) {
@@ -1452,7 +1447,7 @@ O.prototype.add = function(a, c, b, e) {
                   for (f = d; f > t; f--) {
                     g = q.substring(t, f);
                     u = this.rtl ? d - 1 - t : t;
-                    var k = this.score ? this.score(c, q, p, g, u) : Xa(r, e, p, d, u);
+                    var k = this.score ? this.score(c, q, p, g, u) : Ya(r, e, p, d, u);
                     Z(this, m, g, k, a, b);
                   }
                 }
@@ -1462,7 +1457,7 @@ O.prototype.add = function(a, c, b, e) {
               if (1 < d) {
                 for (k = d - 1; 0 < k; k--) {
                   g = q[this.rtl ? d - 1 - k : k] + g;
-                  var h = this.score ? this.score(c, q, p, g, k) : Xa(r, e, p, d, k);
+                  var h = this.score ? this.score(c, q, p, g, k) : Ya(r, e, p, d, k);
                   Z(this, m, g, h, a, b);
                 }
                 g = "";
@@ -1479,7 +1474,7 @@ O.prototype.add = function(a, c, b, e) {
                 for (d = C(), g = this.S, f = q, k = Math.min(n + 1, this.rtl ? p + 1 : e - p), d[f] = 1, h = 1; h < k; h++) {
                   if ((q = c[this.rtl ? e - 1 - p - h : p + h]) && !d[q]) {
                     d[q] = 1;
-                    const t = this.score ? this.score(c, f, p, q, h - 1) : Xa(g + (e / 2 > g ? 0 : 1), e, p, k - 1, h - 1), u = this.bidirectional && q > f;
+                    const t = this.score ? this.score(c, f, p, q, h - 1) : Ya(g + (e / 2 > g ? 0 : 1), e, p, k - 1, h - 1), u = this.bidirectional && q > f;
                     Z(this, l, u ? f : q, t, a, b, u ? q : f);
                   }
                 }
@@ -1498,7 +1493,7 @@ function Z(a, c, b, e, d, f, g) {
     g ? (c = h || (c[b] = C()), c[g] = 1, (h = k.get(g)) ? k = h : k.set(g, k = new Map())) : c[b] = 1, (h = k.get(b)) ? k = h : k.set(b, k = []), k = k[e] || (k[e] = []), f && k.includes(d) || (k.push(d), a.fastupdate && ((c = a.reg.get(d)) ? c.push(k) : a.reg.set(d, [k])));
   }
 }
-function Xa(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;
 }
 ;O.prototype.search = function(a, c, b) {
@@ -1519,11 +1514,11 @@ function Xa(a, c, b, e, d) {
   b = a.length;
   c = c || (k ? 100 : 0);
   if (1 === b) {
-    return g = c, (c = Ya(this, a[0], "")) && c.length ? W.call(this, c, g, d) : [];
+    return g = c, (c = Za(this, a[0], "")) && c.length ? Aa.call(this, c, g, d) : [];
   }
   f = this.depth && !1 !== f;
   if (2 === b && f && !g) {
-    return g = c, (c = Ya(this, a[0], a[1])) && c.length ? W.call(this, c, g, d) : [];
+    return g = c, (c = Za(this, a[0], a[1])) && c.length ? Aa.call(this, c, g, d) : [];
   }
   k = C();
   let l = 0;
@@ -1535,7 +1530,7 @@ function Xa(a, c, b, e, d) {
   for (let q, t; l < b; l++) {
     if ((t = a[l]) && !k[t]) {
       k[t] = 1;
-      q = Ya(this, t, m);
+      q = Za(this, t, m);
       a: {
         f = q;
         var n = e, r = g, p = h;
@@ -1574,14 +1569,14 @@ function Xa(a, c, b, e, d) {
     if (1 < e) {
       m = xa(a, h, c, d, g);
     } else if (1 === e) {
-      g = W.call(null, a[0], c, d);
+      g = Aa.call(null, a[0], c, d);
       break a;
     }
     g = m;
   }
   return g;
 };
-function Ya(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);
@@ -1602,14 +1597,14 @@ function Ya(a, c, b) {
         }
       }
     } else {
-      Za(this.map, a), this.depth && Za(this.ctx, a);
+      $a(this.map, a), this.depth && $a(this.ctx, a);
     }
     c || this.reg.delete(a);
   }
   this.cache && this.cache.remove(a);
   return this;
 };
-function Za(a, c) {
+function $a(a, c) {
   let b = 0;
   if (a.constructor === Array) {
     for (let e = 0, d, f; e < a.length; e++) {
@@ -1624,7 +1619,7 @@ function Za(a, c) {
     }
   } else {
     for (let e of a.entries()) {
-      const d = e[0], f = Za(e[1], c);
+      const d = e[0], f = $a(e[1], c);
       f ? b += f : a.delete(d);
     }
   }
@@ -1636,12 +1631,12 @@ function Za(a, c) {
   }
   if (a) {
     var b = D(a) ? a : a.preset;
-    b && (Wa[b] || console.warn("Preset not found: " + b), a = Object.assign({}, Wa[b], a));
+    b && (Xa[b] || console.warn("Preset not found: " + b), a = Object.assign({}, Xa[b], a));
   } else {
     a = {};
   }
   b = a.context;
-  const e = !0 === b ? {depth:1} : b || {}, d = D(a.encoder) ? Ua[a.encoder] : a.encode || a.encoder || Ma;
+  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 = (b = a.tokenize) && "default" !== b && b || "strict";
@@ -1677,7 +1672,7 @@ x.update = function(a, c) {
   const b = this, e = this.remove(a);
   return e && e.then ? e.then(() => b.add(a, c)) : this.add(a, c);
 };
-function $a(a) {
+function ab(a) {
   let c = 0;
   if (a.constructor === Array) {
     for (let b = 0, e; b < a.length; b++) {
@@ -1685,7 +1680,7 @@ function $a(a) {
     }
   } else {
     for (const b of a.entries()) {
-      const e = b[0], d = $a(b[1]);
+      const e = b[0], d = ab(b[1]);
       d ? c += d : a.delete(e);
     }
   }
@@ -1695,11 +1690,11 @@ x.cleanup = function() {
   if (!this.fastupdate) {
     return console.info('Cleanup the index isn\'t required when not using "fastupdate".'), this;
   }
-  $a(this.map);
-  this.depth && $a(this.ctx);
+  ab(this.map);
+  this.depth && ab(this.ctx);
   return this;
 };
-x.searchCache = La;
+x.searchCache = Ma;
 x.export = function(a, c, b = 0, e = 0) {
   let d, f;
   switch(e) {
@@ -1762,6 +1757,6 @@ x.serialize = function(a = !0) {
 };
 ja(O.prototype);
 C();
-export default {Index:O, Charset:Ua, Encoder:K, Document:V, Worker:null, Resolver:null, IndexedDB:null, Language:{}};
+export default {Index:O, Charset:Va, Encoder:K, Document:V, Worker:null, Resolver:null, IndexedDB:null, Language:{}};
 
-export const Index=O;export const  Charset=Ua;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
+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 13cc9b5..0470ca3 100644
--- a/dist/flexsearch.compact.module.min.js
+++ b/dist/flexsearch.compact.module.min.js
@@ -1,5 +1,5 @@
 /**!
- * FlexSearch.js v0.8.135 (Bundle)
+ * FlexSearch.js v0.8.138 (Bundle)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
@@ -35,38 +35,37 @@ function ua(a,c){let b="";for(const e of a.entries()){a=e[0];const d=e[1];let f=
 f.I;if(g&&!g(c))continue;f.constructor===String&&(f=""+f);f=I(c,f)}if(d&&f){D(f)&&(f=[f]);for(let h=0,l,m;h<f.length;h++)l=f[h],k[l]||(k[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]))))}}if(this.store&&(!b||!this.store.has(a))){let k;if(this.A){k=C();for(let h=0,l;h<this.A.length;h++){l=this.A[h];if((b=l.I)&&!b(c))continue;let m;if("function"===typeof l){m=l(c);if(!m)continue;l=[l.U]}else if(D(l)||l.constructor===
 String){k[l]=c[l];continue}wa(c,k,l,0,l[0],m)}}this.store.set(a,k||c)}}return this};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++)wa(a,c,b,e,d);else c=c[d]||(c[d]=C()),d=b[++e],wa(a,c,b,e,d)}
 function va(a,c,b,e,d,f,g,k){if(a=a[g])if(e===c.length-1){if(a.constructor===Array){if(b[e]){for(c=0;c<a.length;c++)d.add(f,a[c],!0,!0);return}a=a.join(" ")}d.add(f,a,k,!0)}else if(a.constructor===Array)for(g=0;g<a.length;g++)va(a,c,b,e,d,f,g,k);else g=c[++e],va(a,c,b,e,d,f,g,k)};function xa(a,c,b,e,d){const f=a.length;let g=[],k,h;k=C();for(let l=0,m,n,r,p;l<c;l++)for(let q=0;q<f;q++)if(r=a[q],l<r.length&&(m=r[l]))for(let t=0;t<m.length;t++)if(n=m[t],(h=k[n])?k[n]++:(h=0,k[n]=1),p=g[h]||(g[h]=[]),p.push(n),b&&h===f-1&&p.length-e===b)return p;if(a=g.length)if(d)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[];g=g[a-1];if(b||e)if(g.length>b||e)g=g.slice(e,b+e)}return g}
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-function Za(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=Za(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||Ma;this.encoder=d.encode?d:"object"===typeof d?new K(d):{encode:d};this.resolution=a.resolution||9;this.tokenize=b=(b=a.tokenize)&&"default"!==b&&b||"strict";this.depth="strict"===b&&e.depth||0;this.bidirectional=!1!==e.bidirectional;this.fastupdate=!!a.fastupdate;this.score=
+x.import=function(a,c){var b=a.split(".");"json"===b[b.length-1]&&b.pop();a=2<b.length?b[0]:"";b=2<b.length?b[2]:b[1];if(c){"string"===typeof c&&(c=JSON.parse(c));if(a)return this.index.get(a).import(b,c);switch(b){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"],["ph","f"],["pf","f"]]),Qa=[/([^aeo])h(.)/g,"$1$2",/([aeo])h([^aeo]|$)/g,"$1$2",/(.)\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 Wa={LatinExact:{split:/\s+/,normalize:!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:{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:3,fastupdate:!0,context:{depth:1,resolution:1}},match:{tokenize:"forward"},score:{resolution:9,context:{depth:2,resolution:3}}};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,r=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(r,e,p),g="";switch(this.tokenize){case "full":if(2<d){for(let t=0,u;t<d;t++)for(f=d;f>t;f--){g=q.substring(t,f);u=this.rtl?d-1-t:t;var k=this.score?this.score(c,q,p,g,u):Ya(r,e,p,d,u);
+Z(this,m,g,k,a,b)}break}case "reverse":if(1<d){for(k=d-1;0<k;k--){g=q[this.rtl?d-1-k:k]+g;var h=this.score?this.score(c,q,p,g,k):Ya(r,e,p,d,k);Z(this,m,g,h,a,b)}g=""}case "forward":if(1<d){for(k=0;k<d;k++)g+=q[this.rtl?d-1-k:k],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,k=Math.min(n+1,this.rtl?p+1:e-p),d[f]=1,h=1;h<k;h++)if((q=c[this.rtl?e-1-p-h:p+h])&&!d[q]){d[q]=1;const t=this.score?this.score(c,f,p,q,h-1):Ya(g+(e/2>g?0:1),e,p,k-1,h-1),u=this.bidirectional&&
+q>f;Z(this,l,u?f:q,t,a,b,u?q:f)}}}}this.fastupdate||this.reg.add(a)}}return this};function Z(a,c,b,e,d,f,g){let k=g?a.ctx:a.map,h;if(!c[b]||g&&!(h=c[b])[g])g?(c=h||(c[b]=C()),c[g]=1,(h=k.get(g))?k=h:k.set(g,k=new Map)):c[b]=1,(h=k.get(b))?k=h:k.set(b,k=[]),k=k[e]||(k[e]=[]),f&&k.includes(d)||(k.push(d),a.fastupdate&&((c=a.reg.get(d))?c.push(k):a.reg.set(d,[k])))}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 k=!0;var h=b.resolution}else k=!0;a=this.encoder.encode(a);b=a.length;c=c||(k?100:0);if(1===b)return g=c,(c=Za(this,a[0],""))&&c.length?Aa.call(this,c,g,d):[];f=this.depth&&!1!==f;if(2===b&&f&&!g)return g=c,(c=Za(this,a[0],a[1]))&&c.length?Aa.call(this,c,g,d):[];k=C();let l=0;if(1<b&&f){var m=a[0];l=1}h||0===h||(h=m?this.S:this.resolution);
+for(let q,t;l<b;l++){if((t=a[l])&&!k[t]){k[t]=1;q=Za(this,t,m);a:{f=q;var n=e,r=g,p=h;let u=[];if(f&&f.length){if(f.length<=p){n.push(f);q=void 0;break a}for(let w=0,z;w<p;w++)if(z=f[w])u[w]=z;if(u.length){n.push(u);q=void 0;break a}}q=r?void 0:u}if(q){e=q;break}m&&(g&&q&&e.length||(m=t))}g&&m&&l===b-1&&!e.length&&(h=this.resolution,m="",l=-1,k=C())}a:{a=e;e=a.length;m=a;if(1<e)m=xa(a,h,c,d,g);else if(1===e){g=Aa.call(null,a[0],c,d);break a}g=m}return g};
+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};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 $a(this.map,a),this.depth&&$a(this.ctx,a);c||this.reg.delete(a)}this.cache&&this.cache.remove(a);return this};
+function $a(a,c){let b=0;if(a.constructor===Array)for(let e=0,d,f;e<a.length;e++){if((d=a[e])&&d.length)if(f=d.indexOf(c),0<=f){1<d.length?(d.splice(f,1),b++):delete a[e];break}else b++}else for(let e of a.entries()){const d=e[0],f=$a(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)?Wa[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=(b=a.tokenize)&&"default"!==b&&b||"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}x=O.prototype;x.clear=function(){this.map.clear();this.ctx.clear();this.reg.clear();this.cache&&this.cache.clear();return this};x.append=function(a,c){return this.add(a,c,!0)};x.contain=function(a){return this.reg.has(a)};
-x.update=function(a,c){const b=this,e=this.remove(a);return e&&e.then?e.then(()=>b.add(a,c)):this.add(a,c)};function $a(a){let c=0;if(a.constructor===Array)for(let b=0,e;b<a.length;b++)(e=a[b])&&(c+=e.length);else for(const b of a.entries()){const e=b[0],d=$a(b[1]);d?c+=d:a.delete(e)}return c}x.cleanup=function(){if(!this.fastupdate)return this;$a(this.map);this.depth&&$a(this.ctx);return this};x.searchCache=La;
+x.update=function(a,c){const b=this,e=this.remove(a);return e&&e.then?e.then(()=>b.add(a,c)):this.add(a,c)};function ab(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.entries()){const e=b[0],d=ab(b[1]);d?c+=d:a.delete(e)}return c}x.cleanup=function(){if(!this.fastupdate)return this;ab(this.map);this.depth&&ab(this.ctx);return this};x.searchCache=Ma;
 x.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 U.call(this,a,c,d,f,b,e)};
 x.import=function(a,c){if(c)switch("string"===typeof c&&(c=JSON.parse(c)),a=a.split("."),"json"===a[a.length-1]&&a.pop(),3===a.length&&a.shift(),a=1<a.length?a[1]:a[0],a){case "reg":this.fastupdate=!1;this.reg=ta(c,this.reg);break;case "map":this.map=pa(c,this.map);break;case "ctx":this.ctx=ra(c,this.ctx)}};
-x.serialize=function(a=!0){let c="",b="",e="";if(this.reg.size){let f;for(var d of this.reg.keys())f||(f=typeof d),c+=(c?",":"")+("string"===f?'"'+d+'"':d);c="index.reg=new Set(["+c+"]);";b=ua(this.map,f);b="index.map=new Map(["+b+"]);";for(const g of this.ctx.entries()){d=g[0];let k=ua(g[1],f);k="new Map(["+k+"])";k='["'+d+'",'+k+"]";e+=(e?",":"")+k}e="index.ctx=new Map(["+e+"]);"}return a?"function inject(index){"+c+b+e+"}":c+b+e};ja(O.prototype);C();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
+x.serialize=function(a=!0){let c="",b="",e="";if(this.reg.size){let f;for(var d of this.reg.keys())f||(f=typeof d),c+=(c?",":"")+("string"===f?'"'+d+'"':d);c="index.reg=new Set(["+c+"]);";b=ua(this.map,f);b="index.map=new Map(["+b+"]);";for(const g of this.ctx.entries()){d=g[0];let k=ua(g[1],f);k="new Map(["+k+"])";k='["'+d+'",'+k+"]";e+=(e?",":"")+k}e="index.ctx=new Map(["+e+"]);"}return a?"function inject(index){"+c+b+e+"}":c+b+e};ja(O.prototype);C();export default {Index:O,Charset:Wa,Encoder:K,Document:V,Worker:null,Resolver:null,IndexedDB:null,Language:{}};
+export const Index=O;export const Charset=Wa;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 5d5d148..005192e 100644
--- a/dist/flexsearch.es5.debug.js
+++ b/dist/flexsearch.es5.debug.js
@@ -1,5 +1,5 @@
 /**!
- * FlexSearch.js v0.8.135 (ES5/Debug)
+ * FlexSearch.js v0.8.138 (ES5/Debug)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
@@ -3551,7 +3551,7 @@ function Xb(a) {
     a = null;
   });
 }
-;var ac = {Index:P, Charset:Ib, Encoder:Ga, Document:W, Worker:Sa, Resolver:Y, IndexedDB:Wb, Language:{}}, bc = "undefined" !== typeof global ? global : self, cc;
+;var ac = {Index:P, Charset:Ib, Encoder:Ga, Document:W, Worker:Sa, Resolver:Y, IndexedDB:Wb, Language:{}}, bc = "undefined" !== typeof self ? self : "undefined" !== typeof global ? global : self, cc;
 (cc = bc.define) && cc.amd ? cc([], function() {
   return ac;
 }) : "object" === typeof bc.exports ? bc.exports = ac : bc.FlexSearch = ac;
diff --git a/dist/flexsearch.es5.min.js b/dist/flexsearch.es5.min.js
index 1d100c5..883a793 100644
--- a/dist/flexsearch.es5.min.js
+++ b/dist/flexsearch.es5.min.js
@@ -1,5 +1,5 @@
 /**!
- * FlexSearch.js v0.8.135 (ES5)
+ * FlexSearch.js v0.8.138 (ES5)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
@@ -138,4 +138,4 @@ r.P,A=1;A&&k.put(t,w.V+":"+r.Z)}}(q,n))}}),14);case 14:if(a.store)return E(h,d.t
 x(a.tag),m=l.next(),n={};!m.done;n={X:void 0,ba:void 0},m=l.next())m=m.value,n.ba=m[0],n.X=m[1],n.X.length&&(k.get(n.ba).onsuccess=function(p){return function(){var q=this.result;q=q&&q.length?q.concat(p.X):p.X;k.put(q,p.ba)}}(n))}),20);case 20:a.map.clear(),a.ctx.clear(),a.tag&&a.tag.clear(),a.store&&a.store.clear(),a.document||a.reg.clear(),h.h=0}})};
 function $b(a,b,c){for(var d=a.value,e,g,f=0,h=0,k;h<d.length;h++){if(k=c?d:d[h]){for(var l=0,m,n;l<b.length;l++)if(n=b[l],m=k.indexOf(g?parseInt(n,10):n),0>m&&!g&&"string"===typeof n&&!isNaN(n)&&(m=k.indexOf(parseInt(n,10)))&&(g=1),0<=m)if(e=1,1<k.length)k.splice(m,1);else{d[h]=[];break}f+=k.length}if(c)break}f?e&&a.update(d):a.delete();a.continue()}
 u.remove=function(a){"object"!==typeof a&&(a=[a]);return Promise.all([this.transaction("map"+(this.field?":"+this.field:""),"readwrite",function(b){b.openCursor().onsuccess=function(){var c=this.result;c&&$b(c,a)}}),this.transaction("ctx"+(this.field?":"+this.field:""),"readwrite",function(b){b.openCursor().onsuccess=function(){var c=this.result;c&&$b(c,a)}}),this.transaction("tag"+(this.field?":"+this.field:""),"readwrite",function(b){b.openCursor().onsuccess=function(){var c=this.result;c&&$b(c,
-a,!0)}}),this.transaction("reg","readwrite",function(b){for(var c=0;c<a.length;c++)b.delete(a[c])})])};function Zb(a){return new Promise(function(b,c){a.onsuccess=function(){b(this.result)};a.oncomplete=function(){b()};a.onerror=c;a=null})};var ac={Index:O,Charset:Jb,Encoder:Ga,Document:V,Worker:Ta,Resolver:X,IndexedDB:Wb,Language:{}},bc="undefined"!==typeof global?global:self,cc;(cc=bc.define)&&cc.amd?cc([],function(){return ac}):"object"===typeof bc.exports?bc.exports=ac:bc.FlexSearch=ac;}(this||self));
+a,!0)}}),this.transaction("reg","readwrite",function(b){for(var c=0;c<a.length;c++)b.delete(a[c])})])};function Zb(a){return new Promise(function(b,c){a.onsuccess=function(){b(this.result)};a.oncomplete=function(){b()};a.onerror=c;a=null})};var ac={Index:O,Charset:Jb,Encoder:Ga,Document:V,Worker:Ta,Resolver:X,IndexedDB:Wb,Language:{}},bc="undefined"!==typeof self?self:"undefined"!==typeof global?global:self,cc;(cc=bc.define)&&cc.amd?cc([],function(){return ac}):"object"===typeof bc.exports?bc.exports=ac:bc.FlexSearch=ac;}(this||self));
diff --git a/dist/flexsearch.light.debug.js b/dist/flexsearch.light.debug.js
index d1ba250..c60dd87 100644
--- a/dist/flexsearch.light.debug.js
+++ b/dist/flexsearch.light.debug.js
@@ -1,5 +1,5 @@
 /**!
- * FlexSearch.js v0.8.135 (Light/Debug)
+ * FlexSearch.js v0.8.138 (Light/Debug)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
@@ -632,7 +632,7 @@ r.searchCache = function(a, c, b) {
   return f;
 };
 w();
-const R = {Index:L, Charset:null, Encoder:F, Document:null, Worker:null, Resolver:null, IndexedDB:null, Language:{}}, S = "undefined" !== typeof global ? global : self;
+const R = {Index:L, Charset:null, Encoder:F, Document:null, Worker:null, Resolver:null, IndexedDB:null, Language:{}}, S = "undefined" !== typeof self ? self : "undefined" !== typeof global ? global : self;
 let T;
 (T = S.define) && T.amd ? T([], function() {
   return R;
diff --git a/dist/flexsearch.light.min.js b/dist/flexsearch.light.min.js
index 60220b8..b2511e7 100644
--- a/dist/flexsearch.light.min.js
+++ b/dist/flexsearch.light.min.js
@@ -1,5 +1,5 @@
 /**!
- * FlexSearch.js v0.8.135 (Light)
+ * FlexSearch.js v0.8.138 (Light)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
@@ -25,4 +25,4 @@ c,d);break a}c=m}return c};function O(a,c,b){let f;b&&(f=a.bidirectional&&c>b)&&
 function P(a,c){let b=0;if(a.constructor===Array)for(let f=0,d,g;f<a.length;f++){if((d=a[f])&&d.length)if(g=d.indexOf(c),0<=g){1<d.length?(d.splice(g,1),b++):delete a[f];break}else b++}else for(let f of a.entries()){const d=f[0],g=P(f[1],c);g?b+=g:a.delete(d)}return b};function L(a,c){if(!this||this.constructor!==L)return new L(a);if(a){var b="string"===typeof a?a:a.preset;b&&(a=Object.assign({},K[b],a))}else a={};b=a.context;const f=!0===b?{depth:1}:b||{},d=a.encode||a.encoder||J;this.encoder=d.encode?d:"object"===typeof d?new F(d):{encode:d};this.resolution=a.resolution||9;this.tokenize=b=(b=a.tokenize)&&"default"!==b&&b||"strict";this.depth="strict"===b&&f.depth||0;this.bidirectional=!1!==f.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.v=f.resolution||3;this.rtl=d.rtl||a.rtl||!1;this.cache=(b=a.cache||null)&&new I(b)}r=L.prototype;r.clear=function(){this.map.clear();this.ctx.clear();this.reg.clear();this.cache&&this.cache.clear();return this};r.append=function(a,c){return this.add(a,c,!0)};r.contain=function(a){return this.reg.has(a)};r.update=function(a,c){const b=this,f=this.remove(a);return f&&f.then?f.then(()=>b.add(a,c)):this.add(a,c)};
 function Q(a){let c=0;if(a.constructor===Array)for(let b=0,f;b<a.length;b++)(f=a[b])&&(c+=f.length);else for(const b of a.entries()){const f=b[0],d=Q(b[1]);d?c+=d:a.delete(f)}return c}r.cleanup=function(){if(!this.fastupdate)return this;Q(this.map);this.depth&&Q(this.ctx);return this};
-r.searchCache=function(a,c,b){a=("object"===typeof a?""+a.query:a).toLowerCase();this.cache||(this.cache=new I);let f=this.cache.get(a);if(!f){f=this.search(a,c,b);if(f.then){const d=this;f.then(function(g){d.cache.set(a,g);return g})}this.cache.set(a,f)}return f};w();const R={Index:L,Charset:null,Encoder:F,Document:null,Worker:null,Resolver:null,IndexedDB:null,Language:{}},S="undefined"!==typeof global?global:self;let T;(T=S.define)&&T.amd?T([],function(){return R}):"object"===typeof S.exports?S.exports=R:S.FlexSearch=R;}(this||self));
+r.searchCache=function(a,c,b){a=("object"===typeof a?""+a.query:a).toLowerCase();this.cache||(this.cache=new I);let f=this.cache.get(a);if(!f){f=this.search(a,c,b);if(f.then){const d=this;f.then(function(g){d.cache.set(a,g);return g})}this.cache.set(a,f)}return f};w();const R={Index:L,Charset:null,Encoder:F,Document:null,Worker:null,Resolver:null,IndexedDB:null,Language:{}},S="undefined"!==typeof self?self:"undefined"!==typeof global?global:self;let T;(T=S.define)&&T.amd?T([],function(){return R}):"object"===typeof S.exports?S.exports=R:S.FlexSearch=R;}(this||self));
diff --git a/dist/flexsearch.light.module.debug.js b/dist/flexsearch.light.module.debug.js
index 2309e1e..9e0bfd4 100644
--- a/dist/flexsearch.light.module.debug.js
+++ b/dist/flexsearch.light.module.debug.js
@@ -1,5 +1,5 @@
 /**!
- * FlexSearch.js v0.8.135 (Bundle/Debug)
+ * FlexSearch.js v0.8.138 (Bundle/Debug)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
diff --git a/dist/flexsearch.light.module.min.js b/dist/flexsearch.light.module.min.js
index 43d8438..32e5cd9 100644
--- a/dist/flexsearch.light.module.min.js
+++ b/dist/flexsearch.light.module.min.js
@@ -1,5 +1,5 @@
 /**!
- * FlexSearch.js v0.8.135 (Bundle)
+ * FlexSearch.js v0.8.138 (Bundle)
  * Author and Copyright: Thomas Wilkerling
  * Licence: Apache-2.0
  * Hosted by Nextapps GmbH
diff --git a/dist/lang/en.min.js b/dist/lang/en.min.js
index bb2617b..2c60a59 100644
--- a/dist/lang/en.min.js
+++ b/dist/lang/en.min.js
@@ -1,3 +1,3 @@
 (function(self){'use strict';const a={prepare:function(b){return b.replace(/\u00b4`\u2019\u02bc/g,"'").replace(/_+/g," ").replace(/&/g," and ").replace(/\$/g," USD ").replace(/\u00a3/g," GBP ").replace(/([a-z])'s\b/g,"$1 is").replace(/\bi'm\b/g,"i am").replace(/\b(can't|cannot)\b/g,"can not").replace(/\bwon't\b/g,"will not").replace(/([a-z])n't\b/g,"$1 not").replace(/([a-z])'ll\b/g,"$1 will").replace(/([a-z])'re\b/g,"$1 are").replace(/([a-z])'ve\b/g,"$1 have").replace(/([a-z])'d\b/g,"$1 would")},filter:new Set("a about above after again against all also am an and any are arent as at back be because been before being below between both but by can cannot cant come could couldnt did didnt do does doesnt doing dont down during each even few for from further get go good had hadnt has hasnt have havent having he hed her here heres hers herself hes him himself his how hows i id if ill im in into is isnt it its itself ive just know lets like lot make made me more most mustnt my myself new no nor not now of off on once one only or other ought our ours ourselves out over own people same say see shant she shed shell shes should shouldnt so some such take than that thats the their theirs them themselves then there theres these they theyd theyll theyre theyve think this those through time times to too under until up us use very want was wasnt way we wed well were werent weve what whats when whens where wheres which while who whom whos why whys will with wont work would wouldnt ya you youd youll your youre yours yourself yourselves youve".split(" ")),
-stemmer:new Map([["ational",""],["iveness",""],["fulness",""],["ousness",""],["ization",""],["tional",""],["biliti",""],["icate",""],["ative",""],["alize",""],["iciti",""],["entli",""],["ousli",""],["alism",""],["ation",""],["aliti",""],["iviti",""],["ement",""],["izer",""],["able",""],["alli",""],["ator",""],["logi",""],["ical",""],["ance",""],["ence",""],["ness",""],["ble",""],["ment",""],["eli",""],["bli",""],["ful",""],["ant",""],["ent",""],["ism",""],["ate",""],["iti",""],["ous",""],["ive",""],
-["ize",""],["ing",""],["ion",""],["al",""],["ou",""],["er",""],["ic",""],["ly",""]])};"undefined"!==typeof module&&module.exports?module.exports=a:self.FlexSearch&&(self.FlexSearch.Language.en=a);}(this||self));
+stemmer:new Map([["ational",""],["iveness",""],["fulness",""],["ousness",""],["ization",""],["tional","tion"],["biliti",""],["icate",""],["ative",""],["alize",""],["iciti",""],["entli",""],["ousli",""],["alism",""],["ation",""],["aliti",""],["iviti",""],["ement",""],["izer",""],["able",""],["ible",""],["alli",""],["ator",""],["less",""],["logi",""],["ical",""],["ance",""],["ence",""],["ness",""],["ble",""],["ment",""],["eli",""],["bli",""],["ful",""],["ant",""],["ent",""],["ism",""],["ate",""],["iti",
+""],["ous",""],["ive",""],["ize",""],["ing",""],["ion",""],["ies","y"],["al",""],["ou",""],["er",""],["ed",""],["es","e"],["ic",""],["ly",""],["li",""],["s",""]])};"undefined"!==typeof module&&module.exports?module.exports=a:self.FlexSearch&&(self.FlexSearch.Language.en=a);}(this||self));
diff --git a/dist/module-debug/bundle.js b/dist/module-debug/bundle.js
index 8bd3219..95e5e38 100644
--- a/dist/module-debug/bundle.js
+++ b/dist/module-debug/bundle.js
@@ -287,10 +287,7 @@ const FlexSearch = {
     // Legacy Browser: this refers to window
     // ESM Browser: self refers to window
     // NodeJS: global refers to the global scope
-    const root = "undefined" != typeof global ? global :
-    //typeof window !== "undefined" ? window :
-    self;
-    //const root = self;
+    const root = "undefined" != typeof self ? self : "undefined" != typeof global ? global : self;
     let prop;
 
     // AMD (RequireJS)
diff --git a/dist/module-debug/lang/en.js b/dist/module-debug/lang/en.js
index c651a81..f5afb90 100644
--- a/dist/module-debug/lang/en.js
+++ b/dist/module-debug/lang/en.js
@@ -26,7 +26,7 @@ export const filter = new Set(["a", "about", "above", "after", "again", "against
  * @type {Map<string, string>}
  */
 
-export const stemmer = new Map([["ational", ""], ["iveness", ""], ["fulness", ""], ["ousness", ""], ["ization", ""], ["tional", ""], ["biliti", ""], ["icate", ""], ["ative", ""], ["alize", ""], ["iciti", ""], ["entli", ""], ["ousli", ""], ["alism", ""], ["ation", ""], ["aliti", ""], ["iviti", ""], ["ement", ""], ["izer", ""], ["able", ""], ["alli", ""], ["ator", ""], ["logi", ""], ["ical", ""], ["ance", ""], ["ence", ""], ["ness", ""], ["ble", ""], ["ment", ""], ["eli", ""], ["bli", ""], ["ful", ""], ["ant", ""], ["ent", ""], ["ism", ""], ["ate", ""], ["iti", ""], ["ous", ""], ["ive", ""], ["ize", ""], ["ing", ""], ["ion", ""], ["al", ""], ["ou", ""], ["er", ""], ["ic", ""], ["ly", ""]]);
+export const stemmer = new Map([["ational", ""], ["iveness", ""], ["fulness", ""], ["ousness", ""], ["ization", ""], ["tional", "tion"], ["biliti", ""], ["icate", ""], ["ative", ""], ["alize", ""], ["iciti", ""], ["entli", ""], ["ousli", ""], ["alism", ""], ["ation", ""], ["aliti", ""], ["iviti", ""], ["ement", ""], ["izer", ""], ["able", ""], ["ible", ""], ["alli", ""], ["ator", ""], ["less", ""], ["logi", ""], ["ical", ""], ["ance", ""], ["ence", ""], ["ness", ""], ["ble", ""], ["ment", ""], ["eli", ""], ["bli", ""], ["ful", ""], ["ant", ""], ["ent", ""], ["ism", ""], ["ate", ""], ["iti", ""], ["ous", ""], ["ive", ""], ["ize", ""], ["ing", ""], ["ion", ""], ["ies", "y"], ["al", ""], ["ou", ""], ["er", ""], ["ed", ""], ["es", "e"], ["ic", ""], ["ly", ""], ["li", ""], ["s", ""]]);
 
 /*
     he’s (= he is / he has)
diff --git a/dist/module-min/bundle.js b/dist/module-min/bundle.js
index cad799e..26f07c1 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";import{KeystoreMap,KeystoreArray,KeystoreSet}from"./keystore.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.encoder,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,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,KeystoreArray.length,KeystoreMap.size,KeystoreSet.size,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,IndexOptions.export,IndexOptions.import,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,DocumentOptions.export,DocumentOptions.import,ContextOptions.depth,ContextOptions.bidirectional,ContextOptions.resolution,DocumentDescriptor.field,DocumentDescriptor.index,DocumentDescriptor.tag,DocumentDescriptor.store,DocumentDescriptor.id,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:{}};{const a="undefined"==typeof global?self:global;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";import{KeystoreMap,KeystoreArray,KeystoreSet}from"./keystore.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.encoder,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,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,KeystoreArray.length,KeystoreMap.size,KeystoreSet.size,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,IndexOptions.export,IndexOptions.import,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,DocumentOptions.export,DocumentOptions.import,ContextOptions.depth,ContextOptions.bidirectional,ContextOptions.resolution,DocumentDescriptor.field,DocumentDescriptor.index,DocumentDescriptor.tag,DocumentDescriptor.store,DocumentDescriptor.id,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:{}};{const a="undefined"==typeof self?"undefined"==typeof global?self: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/lang/en.js b/dist/module-min/lang/en.js
index c57a8aa..ea105df 100644
--- a/dist/module-min/lang/en.js
+++ b/dist/module-min/lang/en.js
@@ -1 +1 @@
-import{EncoderOptions}from"../type.js";export const filter=new Set(["a","about","above","after","again","against","all","also","am","an","and","any","are","arent","as","at","back","be","because","been","before","being","below","between","both","but","by","can","cannot","cant","come","could","couldnt","did","didnt","do","does","doesnt","doing","dont","down","during","each","even","few","for","from","further","get","go","good","had","hadnt","has","hasnt","have","havent","having","he","hed","her","here","heres","hers","herself","hes","him","himself","his","how","hows","i","id","if","ill","im","in","into","is","isnt","it","its","itself","ive","just","know","lets","like","lot","make","made","me","more","most","mustnt","my","myself","new","no","nor","not","now","of","off","on","once","one","only","or","other","ought","our","ours","ourselves","out","over","own","people","same","say","see","shant","she","shed","shell","shes","should","shouldnt","so","some","such","take","than","that","thats","the","their","theirs","them","themselves","then","there","theres","these","they","theyd","theyll","theyre","theyve","think","this","those","through","time","times","to","too","under","until","up","us","use","very","want","was","wasnt","way","we","wed","well","were","werent","weve","what","whats","when","whens","where","wheres","which","while","who","whom","whos","why","whys","will","with","wont","work","would","wouldnt","ya","you","youd","youll","your","youre","yours","yourself","yourselves","youve"]);export const stemmer=new Map([["ational",""],["iveness",""],["fulness",""],["ousness",""],["ization",""],["tional",""],["biliti",""],["icate",""],["ative",""],["alize",""],["iciti",""],["entli",""],["ousli",""],["alism",""],["ation",""],["aliti",""],["iviti",""],["ement",""],["izer",""],["able",""],["alli",""],["ator",""],["logi",""],["ical",""],["ance",""],["ence",""],["ness",""],["ble",""],["ment",""],["eli",""],["bli",""],["ful",""],["ant",""],["ent",""],["ism",""],["ate",""],["iti",""],["ous",""],["ive",""],["ize",""],["ing",""],["ion",""],["al",""],["ou",""],["er",""],["ic",""],["ly",""]]);const options={prepare:function(a){return a.replace(/´`’ʼ/g,"'").replace(/_+/g," ").replace(/&/g," and ").replace(/\$/g," USD ").replace(/£/g," GBP ").replace(/([a-z])'s\b/g,"$1 is").replace(/\bi'm\b/g,"i am").replace(/\b(can't|cannot)\b/g,"can not").replace(/\bwon't\b/g,"will not").replace(/([a-z])n't\b/g,"$1 not").replace(/([a-z])'ll\b/g,"$1 will").replace(/([a-z])'re\b/g,"$1 are").replace(/([a-z])'ve\b/g,"$1 have").replace(/([a-z])'d\b/g,"$1 would")},filter:filter,stemmer:stemmer};export default options;
\ No newline at end of file
+import{EncoderOptions}from"../type.js";export const filter=new Set(["a","about","above","after","again","against","all","also","am","an","and","any","are","arent","as","at","back","be","because","been","before","being","below","between","both","but","by","can","cannot","cant","come","could","couldnt","did","didnt","do","does","doesnt","doing","dont","down","during","each","even","few","for","from","further","get","go","good","had","hadnt","has","hasnt","have","havent","having","he","hed","her","here","heres","hers","herself","hes","him","himself","his","how","hows","i","id","if","ill","im","in","into","is","isnt","it","its","itself","ive","just","know","lets","like","lot","make","made","me","more","most","mustnt","my","myself","new","no","nor","not","now","of","off","on","once","one","only","or","other","ought","our","ours","ourselves","out","over","own","people","same","say","see","shant","she","shed","shell","shes","should","shouldnt","so","some","such","take","than","that","thats","the","their","theirs","them","themselves","then","there","theres","these","they","theyd","theyll","theyre","theyve","think","this","those","through","time","times","to","too","under","until","up","us","use","very","want","was","wasnt","way","we","wed","well","were","werent","weve","what","whats","when","whens","where","wheres","which","while","who","whom","whos","why","whys","will","with","wont","work","would","wouldnt","ya","you","youd","youll","your","youre","yours","yourself","yourselves","youve"]);export const stemmer=new Map([["ational",""],["iveness",""],["fulness",""],["ousness",""],["ization",""],["tional","tion"],["biliti",""],["icate",""],["ative",""],["alize",""],["iciti",""],["entli",""],["ousli",""],["alism",""],["ation",""],["aliti",""],["iviti",""],["ement",""],["izer",""],["able",""],["ible",""],["alli",""],["ator",""],["less",""],["logi",""],["ical",""],["ance",""],["ence",""],["ness",""],["ble",""],["ment",""],["eli",""],["bli",""],["ful",""],["ant",""],["ent",""],["ism",""],["ate",""],["iti",""],["ous",""],["ive",""],["ize",""],["ing",""],["ion",""],["ies","y"],["al",""],["ou",""],["er",""],["ed",""],["es","e"],["ic",""],["ly",""],["li",""],["s",""]]);const options={prepare:function(a){return a.replace(/´`’ʼ/g,"'").replace(/_+/g," ").replace(/&/g," and ").replace(/\$/g," USD ").replace(/£/g," GBP ").replace(/([a-z])'s\b/g,"$1 is").replace(/\bi'm\b/g,"i am").replace(/\b(can't|cannot)\b/g,"can not").replace(/\bwon't\b/g,"will not").replace(/([a-z])n't\b/g,"$1 not").replace(/([a-z])'ll\b/g,"$1 will").replace(/([a-z])'re\b/g,"$1 are").replace(/([a-z])'ve\b/g,"$1 have").replace(/([a-z])'d\b/g,"$1 would")},filter:filter,stemmer:stemmer};export default options;
\ No newline at end of file
diff --git a/dist/module/bundle.js b/dist/module/bundle.js
index 8bd3219..95e5e38 100644
--- a/dist/module/bundle.js
+++ b/dist/module/bundle.js
@@ -287,10 +287,7 @@ const FlexSearch = {
     // Legacy Browser: this refers to window
     // ESM Browser: self refers to window
     // NodeJS: global refers to the global scope
-    const root = "undefined" != typeof global ? global :
-    //typeof window !== "undefined" ? window :
-    self;
-    //const root = self;
+    const root = "undefined" != typeof self ? self : "undefined" != typeof global ? global : self;
     let prop;
 
     // AMD (RequireJS)
diff --git a/dist/module/lang/en.js b/dist/module/lang/en.js
index c651a81..f5afb90 100644
--- a/dist/module/lang/en.js
+++ b/dist/module/lang/en.js
@@ -26,7 +26,7 @@ export const filter = new Set(["a", "about", "above", "after", "again", "against
  * @type {Map<string, string>}
  */
 
-export const stemmer = new Map([["ational", ""], ["iveness", ""], ["fulness", ""], ["ousness", ""], ["ization", ""], ["tional", ""], ["biliti", ""], ["icate", ""], ["ative", ""], ["alize", ""], ["iciti", ""], ["entli", ""], ["ousli", ""], ["alism", ""], ["ation", ""], ["aliti", ""], ["iviti", ""], ["ement", ""], ["izer", ""], ["able", ""], ["alli", ""], ["ator", ""], ["logi", ""], ["ical", ""], ["ance", ""], ["ence", ""], ["ness", ""], ["ble", ""], ["ment", ""], ["eli", ""], ["bli", ""], ["ful", ""], ["ant", ""], ["ent", ""], ["ism", ""], ["ate", ""], ["iti", ""], ["ous", ""], ["ive", ""], ["ize", ""], ["ing", ""], ["ion", ""], ["al", ""], ["ou", ""], ["er", ""], ["ic", ""], ["ly", ""]]);
+export const stemmer = new Map([["ational", ""], ["iveness", ""], ["fulness", ""], ["ousness", ""], ["ization", ""], ["tional", "tion"], ["biliti", ""], ["icate", ""], ["ative", ""], ["alize", ""], ["iciti", ""], ["entli", ""], ["ousli", ""], ["alism", ""], ["ation", ""], ["aliti", ""], ["iviti", ""], ["ement", ""], ["izer", ""], ["able", ""], ["ible", ""], ["alli", ""], ["ator", ""], ["less", ""], ["logi", ""], ["ical", ""], ["ance", ""], ["ence", ""], ["ness", ""], ["ble", ""], ["ment", ""], ["eli", ""], ["bli", ""], ["ful", ""], ["ant", ""], ["ent", ""], ["ism", ""], ["ate", ""], ["iti", ""], ["ous", ""], ["ive", ""], ["ize", ""], ["ing", ""], ["ion", ""], ["ies", "y"], ["al", ""], ["ou", ""], ["er", ""], ["ed", ""], ["es", "e"], ["ic", ""], ["ly", ""], ["li", ""], ["s", ""]]);
 
 /*
     he’s (= he is / he has)
diff --git a/example/nodejs-esm/basic-export-import/index.js b/example/nodejs-esm/basic-export-import/index.js
index 744c906..69121cf 100644
--- a/example/nodejs-esm/basic-export-import/index.js
+++ b/example/nodejs-esm/basic-export-import/index.js
@@ -1,4 +1,4 @@
-import { Index } from "flexsearch/esm";
+import { Index } from "flexsearch";
 
 // you will need to keep the index configuration
 // they will not export, also every change to the
diff --git a/example/nodejs-esm/basic-persistent/index.js b/example/nodejs-esm/basic-persistent/index.js
index f9b47d7..ea77b0f 100644
--- a/example/nodejs-esm/basic-persistent/index.js
+++ b/example/nodejs-esm/basic-persistent/index.js
@@ -1,4 +1,4 @@
-import { Index } from "flexsearch/esm";
+import { Index } from "flexsearch";
 import Sqlite from "flexsearch/db/sqlite";
 // import Postgres from "flexsearch/db/postgres";
 // import MongoDB from "flexsearch/db/mongodb";
diff --git a/example/nodejs-esm/basic-resolver/index.js b/example/nodejs-esm/basic-resolver/index.js
index 8848171..f25b4b5 100644
--- a/example/nodejs-esm/basic-resolver/index.js
+++ b/example/nodejs-esm/basic-resolver/index.js
@@ -1,4 +1,4 @@
-import { Index } from "flexsearch/esm";
+import { Index } from "flexsearch";
 
 // create a simple index which can store id-content-pairs
 const index = new Index({
diff --git a/example/nodejs-esm/basic-suggestion/index.js b/example/nodejs-esm/basic-suggestion/index.js
index 8848171..f25b4b5 100644
--- a/example/nodejs-esm/basic-suggestion/index.js
+++ b/example/nodejs-esm/basic-suggestion/index.js
@@ -1,4 +1,4 @@
-import { Index } from "flexsearch/esm";
+import { Index } from "flexsearch";
 
 // create a simple index which can store id-content-pairs
 const index = new Index({
diff --git a/example/nodejs-esm/basic-worker-export-import/config.js b/example/nodejs-esm/basic-worker-export-import/config.js
index 907c96d..4464e7d 100644
--- a/example/nodejs-esm/basic-worker-export-import/config.js
+++ b/example/nodejs-esm/basic-worker-export-import/config.js
@@ -1,4 +1,4 @@
-import { Encoder } from "flexsearch/esm";
+import { Encoder } from "flexsearch";
 import { promises as fs } from "fs";
 
 (async function(){
diff --git a/example/nodejs-esm/basic-worker-export-import/index.js b/example/nodejs-esm/basic-worker-export-import/index.js
index 67f7ab3..217e740 100644
--- a/example/nodejs-esm/basic-worker-export-import/index.js
+++ b/example/nodejs-esm/basic-worker-export-import/index.js
@@ -1,4 +1,4 @@
-import { Worker as WorkerIndex } from "flexsearch/esm";
+import { Worker as WorkerIndex } from "flexsearch";
 const dirname = import.meta.dirname;
 
 // you will need to keep the index configuration
diff --git a/example/nodejs-esm/basic-worker-extern-config/config.js b/example/nodejs-esm/basic-worker-extern-config/config.js
index 3bf5a68..872ef84 100644
--- a/example/nodejs-esm/basic-worker-extern-config/config.js
+++ b/example/nodejs-esm/basic-worker-extern-config/config.js
@@ -1,4 +1,4 @@
-import { Encoder } from "flexsearch/esm";
+import { Encoder } from "flexsearch";
 
 export default {
     tokenize: "forward",
diff --git a/example/nodejs-esm/basic-worker-extern-config/index.js b/example/nodejs-esm/basic-worker-extern-config/index.js
index 5038267..4735a96 100644
--- a/example/nodejs-esm/basic-worker-extern-config/index.js
+++ b/example/nodejs-esm/basic-worker-extern-config/index.js
@@ -1,4 +1,4 @@
-import { Worker as WorkerIndex } from "flexsearch/esm";
+import { Worker as WorkerIndex } from "flexsearch";
 const dirname = import.meta.dirname;
 
 (async function(){
diff --git a/example/nodejs-esm/basic-worker/index.js b/example/nodejs-esm/basic-worker/index.js
index 4797f39..5fef25d 100644
--- a/example/nodejs-esm/basic-worker/index.js
+++ b/example/nodejs-esm/basic-worker/index.js
@@ -1,4 +1,4 @@
-import { Worker as WorkerIndex } from "flexsearch/esm";
+import { Worker as WorkerIndex } from "flexsearch";
 
 (async function(){
 
diff --git a/example/nodejs-esm/basic/index.js b/example/nodejs-esm/basic/index.js
index 961cb16..1b6573d 100644
--- a/example/nodejs-esm/basic/index.js
+++ b/example/nodejs-esm/basic/index.js
@@ -1,4 +1,4 @@
-import { Index } from "flexsearch/esm";
+import { Index } from "flexsearch";
 
 // create a simple index which can store id-content-pairs
 const index = new Index({
diff --git a/example/nodejs-esm/document-export-import/index.js b/example/nodejs-esm/document-export-import/index.js
index 7f4f6f2..558101b 100644
--- a/example/nodejs-esm/document-export-import/index.js
+++ b/example/nodejs-esm/document-export-import/index.js
@@ -1,4 +1,4 @@
-import { Document, Charset } from "flexsearch/esm";
+import { Document, Charset } from "flexsearch";
 import { promises as fs } from "fs";
 
 const dirname = import.meta.dirname;
diff --git a/example/nodejs-esm/document-persistent/index.js b/example/nodejs-esm/document-persistent/index.js
index 34c3e5d..e5991e5 100644
--- a/example/nodejs-esm/document-persistent/index.js
+++ b/example/nodejs-esm/document-persistent/index.js
@@ -1,4 +1,4 @@
-import { Document, Charset } from "flexsearch/esm";
+import { Document, Charset } from "flexsearch";
 import { promises as fs } from "fs";
 const dirname = import.meta.dirname;
 
diff --git a/example/nodejs-esm/document-worker-export-import/config.originalTitle.js b/example/nodejs-esm/document-worker-export-import/config.originalTitle.js
index e04a664..b2e10c2 100644
--- a/example/nodejs-esm/document-worker-export-import/config.originalTitle.js
+++ b/example/nodejs-esm/document-worker-export-import/config.originalTitle.js
@@ -1,5 +1,5 @@
-import { Encoder, Charset } from "flexsearch/esm";
-import EnglishPreset from "flexsearch/esm/lang/en";
+import { Encoder, Charset } from "flexsearch";
+import EnglishPreset from "flexsearch/lang/en";
 import { promises as fs } from "fs";
 
 (async function(){
diff --git a/example/nodejs-esm/document-worker-export-import/config.primaryTitle.js b/example/nodejs-esm/document-worker-export-import/config.primaryTitle.js
index e04a664..b2e10c2 100644
--- a/example/nodejs-esm/document-worker-export-import/config.primaryTitle.js
+++ b/example/nodejs-esm/document-worker-export-import/config.primaryTitle.js
@@ -1,5 +1,5 @@
-import { Encoder, Charset } from "flexsearch/esm";
-import EnglishPreset from "flexsearch/esm/lang/en";
+import { Encoder, Charset } from "flexsearch";
+import EnglishPreset from "flexsearch/lang/en";
 import { promises as fs } from "fs";
 
 (async function(){
diff --git a/example/nodejs-esm/document-worker-export-import/index.js b/example/nodejs-esm/document-worker-export-import/index.js
index d553e2e..3892308 100644
--- a/example/nodejs-esm/document-worker-export-import/index.js
+++ b/example/nodejs-esm/document-worker-export-import/index.js
@@ -1,4 +1,4 @@
-import { Document } from "flexsearch/esm";
+import { Document } from "flexsearch";
 import { promises as fs } from "fs";
 const dirname = import.meta.dirname;
 
diff --git a/example/nodejs-esm/document-worker-extern-config/config.originalTitle.js b/example/nodejs-esm/document-worker-extern-config/config.originalTitle.js
index 566cbd0..e402c53 100644
--- a/example/nodejs-esm/document-worker-extern-config/config.originalTitle.js
+++ b/example/nodejs-esm/document-worker-extern-config/config.originalTitle.js
@@ -1,5 +1,5 @@
-import { Encoder, Charset } from "flexsearch/esm";
-import EnglishPreset from "flexsearch/esm/lang/en";
+import { Encoder, Charset } from "flexsearch";
+import EnglishPreset from "flexsearch/lang/en";
 
 export default {
     tokenize: "forward",
diff --git a/example/nodejs-esm/document-worker-extern-config/config.primaryTitle.js b/example/nodejs-esm/document-worker-extern-config/config.primaryTitle.js
index 566cbd0..e402c53 100644
--- a/example/nodejs-esm/document-worker-extern-config/config.primaryTitle.js
+++ b/example/nodejs-esm/document-worker-extern-config/config.primaryTitle.js
@@ -1,5 +1,5 @@
-import { Encoder, Charset } from "flexsearch/esm";
-import EnglishPreset from "flexsearch/esm/lang/en";
+import { Encoder, Charset } from "flexsearch";
+import EnglishPreset from "flexsearch/lang/en";
 
 export default {
     tokenize: "forward",
diff --git a/example/nodejs-esm/document-worker-extern-config/index.js b/example/nodejs-esm/document-worker-extern-config/index.js
index 430c353..8e54d53 100644
--- a/example/nodejs-esm/document-worker-extern-config/index.js
+++ b/example/nodejs-esm/document-worker-extern-config/index.js
@@ -1,4 +1,4 @@
-import { Document } from "flexsearch/esm";
+import { Document } from "flexsearch";
 import { promises as fs } from "fs";
 const dirname = import.meta.dirname;
 
diff --git a/example/nodejs-esm/document-worker/index.js b/example/nodejs-esm/document-worker/index.js
index 2d4a6d7..9a2f080 100644
--- a/example/nodejs-esm/document-worker/index.js
+++ b/example/nodejs-esm/document-worker/index.js
@@ -1,4 +1,4 @@
-import { Document } from "flexsearch/esm";
+import { Document } from "flexsearch";
 import { promises as fs } from "fs";
 const dirname = import.meta.dirname;
 
diff --git a/example/nodejs-esm/document/index.js b/example/nodejs-esm/document/index.js
index 9c53320..fbed4f3 100644
--- a/example/nodejs-esm/document/index.js
+++ b/example/nodejs-esm/document/index.js
@@ -1,4 +1,4 @@
-import { Document, Charset } from "flexsearch/esm";
+import { Document, Charset } from "flexsearch";
 import fs from "fs";
 
 const dirname = import.meta.dirname;
diff --git a/example/nodejs-esm/language-pack/index.js b/example/nodejs-esm/language-pack/index.js
index b904a73..9e1050f 100644
--- a/example/nodejs-esm/language-pack/index.js
+++ b/example/nodejs-esm/language-pack/index.js
@@ -1,5 +1,5 @@
-import { Index, Encoder, Charset } from "flexsearch/esm";
-import EnglishPreset from "flexsearch/esm/lang/en";
+import { Index, Encoder, Charset } from "flexsearch";
+import EnglishPreset from "flexsearch/lang/en";
 
 const encoder = new Encoder(
     Charset.LatinSimple,
diff --git a/package-lock.json b/package-lock.json
index 38168b0..0117b2f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "flexsearch",
-  "version": "0.8.135",
+  "version": "0.8.138",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "flexsearch",
-      "version": "0.8.135",
+      "version": "0.8.138",
       "funding": [
         {
           "type": "github",
diff --git a/package.json b/package.json
index a873bc9..40d304e 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "public": true,
   "preferGlobal": false,
   "name": "flexsearch",
-  "version": "0.8.135",
+  "version": "0.8.138",
   "description": "Next-Generation full-text search library for Browser and Node.js",
   "homepage": "https://github.com/nextapps-de/flexsearch/",
   "author": "Thomas Wilkerling",
@@ -48,7 +48,8 @@
       "import": "./dist/flexsearch.bundle.module.debug.js",
       "require": "./dist/flexsearch.bundle.debug.js"
     },
-    "./esm": "./dist/flexsearch.bundle.module.min.js"
+    "./esm": "./dist/flexsearch.bundle.module.min.js",
+    "./esm/lang/*": "./dist/module/lang/*.js"
   },
   "browser": {
     "flexsearch": "./dist/flexsearch.bundle.module.min.js",
diff --git a/src/bundle.js b/src/bundle.js
index cdd8669..7f72476 100644
--- a/src/bundle.js
+++ b/src/bundle.js
@@ -321,10 +321,9 @@ if(RELEASE !== "bundle.module" &&
     // Legacy Browser: this refers to window
     // ESM Browser: self refers to window
     // NodeJS: global refers to the global scope
-    const root = typeof global !== "undefined" ? global :
-                 //typeof window !== "undefined" ? window :
+    const root = typeof self !== "undefined" ? self :
+                 typeof global !== "undefined" ? global :
                  self;
-    //const root = self;
     let prop;
 
     // AMD (RequireJS)
diff --git a/src/document/search.js b/src/document/search.js
index 314e440..e834ba2 100644
--- a/src/document/search.js
+++ b/src/document/search.js
@@ -655,7 +655,7 @@ function get_tag(tag, key, limit, offset, enrich){
 
 export function apply_enrich(ids){
 
-    if(!SUPPORT_PERSISTENT || !this || !this.store) return ids;
+    if(!this || !this.store) return ids;
 
     /** @type {EnrichedSearchResults} */
     const result = new Array(ids.length);
diff --git a/src/lang/en.js b/src/lang/en.js
index 0052366..cc4e102 100644
--- a/src/lang/en.js
+++ b/src/lang/en.js
@@ -228,7 +228,7 @@ export const stemmer = new Map([
     ["fulness", ""],
     ["ousness", ""],
     ["ization", ""],
-    ["tional", ""],
+    ["tional", "tion"],
     ["biliti", ""],
     ["icate", ""],
     ["ative", ""],
@@ -243,8 +243,10 @@ export const stemmer = new Map([
     ["ement", ""],
     ["izer", ""],
     ["able", ""],
+    ["ible", ""],
     ["alli", ""],
     ["ator", ""],
+    ["less", ""],
     ["logi", ""],
     ["ical", ""],
     ["ance", ""],
@@ -265,11 +267,16 @@ export const stemmer = new Map([
     ["ize", ""],
     ["ing", ""],
     ["ion", ""],
+    ["ies", "y"],
     ["al", ""],
     ["ou", ""],
     ["er", ""],
+    ["ed", ""],
+    ["es", "e"],
     ["ic", ""],
-    ["ly", ""]
+    ["ly", ""],
+    ["li", ""],
+    ["s", ""]
 ]);
 
 /*