diff --git a/dist/flexsearch.bundle.js b/dist/flexsearch.bundle.js
index a0b3a1d..c9b3a28 100644
--- a/dist/flexsearch.bundle.js
+++ b/dist/flexsearch.bundle.js
@@ -27,7 +27,7 @@ function U(a,b,c,d,e){a=a[e];if(d===c.length-1)b[e]=a;else if(a)if(a.constructor
 t.add=function(a,b,c){C(a)&&(b=a,a=T(b,this.key));if(b&&(a||0===a)){if(!c&&this.register[a])return this.update(a,b);for(let d=0,e,f;d<this.h.length;d++)f=this.h[d],e=this.K[d],x(e)&&(e=[e]),V(b,e,this.A,0,this.index[f],a,e[0],c);if(this.I){let d=T(b,this.I),e=v();x(d)&&(d=[d]);for(let f=0,g,h;f<d.length;f++)if(g=d[f],!e[g]&&(e[g]=1,h=this.l[g]||(this.l[g]=[]),!c||-1===h.indexOf(a)))if(h[h.length]=a,this.m){const k=this.register[a]||(this.register[a]=[]);k[k.length]=h}}if(this.store&&(!c||!this.store[a])){let d;
 if(this.G){d=v();for(let e=0,f;e<this.G.length;e++)f=this.G[e],x(f)?d[f]=b[f]:U(b,d,f,0,f[0])}this.store[a]=d||b}}return this};t.append=function(a,b){return this.add(a,b,!0)};t.update=function(a,b){return this.remove(a).add(a,b)};
 t.remove=function(a){C(a)&&(a=T(a,this.key));if(this.register[a]){for(var b=0;b<this.h.length&&(this.index[this.h[b]].remove(a,!this.o),!this.m);b++);if(this.I&&!this.m)for(let c in this.l){b=this.l[c];const d=b.indexOf(a);-1!==d&&(1<b.length?b.splice(d,1):delete this.l[c])}this.store&&delete this.store[a];delete this.register[a]}return this};
-t.search=function(a,b,c,d){C(a)?(c=a,a=c.query):C(b)&&(c=b,b=0);let e=[],f=[],g,h,k,m,n,w,q=0;if(c)if(c.constructor===Array)k=c,c=null;else{k=(g=c.pluck)||c.index||c.field||c;m=c.tag;h=this.store&&c.enrich;n="and"===c.bool;b=c.limit||100;w=c.offset||0;if(m&&(x(m)&&(m=[m]),!a)){for(let l=0,p;l<m.length;l++)if(p=za.call(this,m[l],b,w,h))e[e.length]=p,q++;return q?e:[]}x(k)&&(k=[k])}k||(k=this.h);n=n&&(1<k.length||m&&1<m.length);const r=!d&&(this.o||this.async)&&[];for(let l=0,p,z,B;l<k.length;l++){let A;
+t.search=function(a,b,c,d){C(a)?(c=a,a=c.query):C(b)&&(c=b,b=0);let e=[],f=[],g,h,k,m,n,w,q=0;if(c)if(c.constructor===Array)k=c,c=null;else{k=(g=c.pluck)||c.index||c.field;m=c.tag;h=this.store&&c.enrich;n="and"===c.bool;b=c.limit||100;w=c.offset||0;if(m&&(x(m)&&(m=[m]),!a)){for(let l=0,p;l<m.length;l++)if(p=za.call(this,m[l],b,w,h))e[e.length]=p,q++;return q?e:[]}x(k)&&(k=[k])}k||(k=this.h);n=n&&(1<k.length||m&&1<m.length);const r=!d&&(this.o||this.async)&&[];for(let l=0,p,z,B;l<k.length;l++){let A;
 z=k[l];x(z)||(A=z,z=z.field);if(r)r[l]=this.index[z].searchAsync(a,b,A||c);else{d?p=d[l]:p=this.index[z].search(a,b,A||c);B=p&&p.length;if(m&&B){const y=[];let H=0;n&&(y[0]=[p]);for(let X=0,qa,R;X<m.length;X++)if(qa=m[X],B=(R=this.l[qa])&&R.length)H++,y[y.length]=n?[R]:R;H&&(p=n?na(y,b||100,w||0):oa(p,y),B=p.length)}if(B)f[q]=z,e[q++]=p;else if(n)return[]}}if(r){const l=this;return new Promise(function(p){Promise.all(r).then(function(z){p(l.search(a,b,c,z))})})}if(!q)return[];if(g&&(!h||!this.store))return e[0];
 for(let l=0,p;l<f.length;l++){p=e[l];p.length&&h&&(p=Aa.call(this,p));if(g)return p;e[l]={field:f[l],result:p}}return e};function za(a,b,c,d){let e=this.l[a],f=e&&e.length-c;if(f&&0<f){if(f>b||c)e=e.slice(c,c+b);d&&(e=Aa.call(this,e));return{tag:a,result:e}}}function Aa(a){const b=Array(a.length);for(let c=0,d;c<a.length;c++)d=a[c],b[c]={id:d,doc:this.store[d]};return b}t.contain=function(a){return!!this.register[a]};t.get=function(a){return this.store[a]};t.set=function(a,b){this.store[a]=b;return this};
 t.searchCache=pa;t.export=function(a,b,c,d,e){e||(e=0);d||(d=0);if(d<this.h.length){const f=this.h[d],g=this.index[f];b=this;setTimeout(function(){g.export(a,b,e?f.replace(":","-"):"",d,e++)||(d++,e=1,b.export(a,b,f,d,e))})}else{let f;switch(e){case 1:c="tag";f=this.l;break;case 2:c="store";f=this.store;break;default:return}sa(a,this,c,d,e,f)}};
diff --git a/dist/flexsearch.compact.js b/dist/flexsearch.compact.js
index f33d125..d6ceaf0 100644
--- a/dist/flexsearch.compact.js
+++ b/dist/flexsearch.compact.js
@@ -22,7 +22,7 @@ function R(a,b,c,e,d){let f=0;if(a.constructor===Array)if(d)b=a.indexOf(b),-1!==
 function V(a,b,c,e,d){a=a[d];if(e===c.length-1)b[d]=a;else if(a)if(a.constructor===Array)for(b=b[d]=Array(a.length),d=0;d<a.length;d++)V(a,b,c,e,d);else b=b[d]||(b[d]=z()),d=c[++e],V(a,b,c,e,d)}function W(a,b,c,e,d,f,g,h){a=a[g];if(e===b.length-1){if(a.constructor===Array){if(c[e]){for(b=0;b<a.length;b++)d.add(f,a[b],!0,!0);return}a=a.join(" ")}d.add(f,a,h,!0)}else if(a)if(a.constructor===Array)for(g=0;g<a.length;g++)W(a,b,c,e,d,f,g,h);else g=b[++e],W(a,b,c,e,d,f,g,h)}t=T.prototype;
 t.add=function(a,b,c){D(a)&&(b=a,a=pa(b,this.key));if(b&&(a||0===a)){if(!c&&this.register[a])return this.update(a,b);for(let e=0,d,f;e<this.h.length;e++)f=this.h[e],d=this.F[e],C(d)&&(d=[d]),W(b,d,this.o,0,this.index[f],a,d[0],c);if(this.store&&(!c||!this.store[a])){let e;if(this.l){e=z();for(let d=0,f;d<this.l.length;d++)f=this.l[d],C(f)?e[f]=b[f]:V(b,e,f,0,f[0])}this.store[a]=e||b}}return this};t.append=function(a,b){return this.add(a,b,!0)};t.update=function(a,b){return this.remove(a).add(a,b)};
 t.remove=function(a){D(a)&&(a=pa(a,this.key));if(this.register[a]){for(let b=0;b<this.h.length&&(this.index[this.h[b]].remove(a,!this.I),!this.D);b++);this.store&&delete this.store[a];delete this.register[a]}return this};
-t.search=function(a,b,c,e){D(a)?(c=a,a=c.query):D(b)&&(c=b,b=0);let d=[],f=[],g,h,k,m,n,u,q=0;if(c)if(c.constructor===Array)k=c,c=null;else{k=(g=c.pluck)||c.index||c.field||c;m=!1;h=this.store&&c.enrich;n="and"===c.bool;b=c.limit||100;u=c.offset||0;if(m&&(C(m)&&(m=[m]),!a)){for(let l=0,p;l<m.length;l++)if(p=qa.call(this,m[l],b,u,h))d[d.length]=p,q++;return q?d:[]}C(k)&&(k=[k])}k||(k=this.h);n=n&&(1<k.length||m&&1<m.length);const r=!e&&(this.I||this.async)&&[];for(let l=0,p,y,B;l<k.length;l++){let A;
+t.search=function(a,b,c,e){D(a)?(c=a,a=c.query):D(b)&&(c=b,b=0);let d=[],f=[],g,h,k,m,n,u,q=0;if(c)if(c.constructor===Array)k=c,c=null;else{k=(g=c.pluck)||c.index||c.field;m=!1;h=this.store&&c.enrich;n="and"===c.bool;b=c.limit||100;u=c.offset||0;if(m&&(C(m)&&(m=[m]),!a)){for(let l=0,p;l<m.length;l++)if(p=qa.call(this,m[l],b,u,h))d[d.length]=p,q++;return q?d:[]}C(k)&&(k=[k])}k||(k=this.h);n=n&&(1<k.length||m&&1<m.length);const r=!e&&(this.I||this.async)&&[];for(let l=0,p,y,B;l<k.length;l++){let A;
 y=k[l];C(y)||(A=y,y=y.field);if(r)r[l]=this.index[y].searchAsync(a,b,A||c);else{e?p=e[l]:p=this.index[y].search(a,b,A||c);B=p&&p.length;if(m&&B){const x=[];let G=0;n&&(x[0]=[p]);for(let S=0,ja,N;S<m.length;S++)if(ja=m[S],B=(N=this.J[ja])&&N.length)G++,x[x.length]=n?[N]:N;G&&(p=n?ia(x,b||100,u||0):ka(p,x),B=p.length)}if(B)f[q]=y,d[q++]=p;else if(n)return[]}}if(r){const l=this;return new Promise(function(p){Promise.all(r).then(function(y){p(l.search(a,b,c,y))})})}if(!q)return[];if(g&&(!h||!this.store))return d[0];
 for(let l=0,p;l<f.length;l++){p=d[l];p.length&&h&&(p=ra.call(this,p));if(g)return p;d[l]={field:f[l],result:p}}return d};function qa(a,b,c,e){let d=this.J[a],f=d&&d.length-c;if(f&&0<f){if(f>b||c)d=d.slice(c,c+b);e&&(d=ra.call(this,d));return{tag:a,result:d}}}function ra(a){const b=Array(a.length);for(let c=0,e;c<a.length;c++)e=a[c],b[c]={id:e,doc:this.store[e]};return b}t.contain=function(a){return!!this.register[a]};t.get=function(a){return this.store[a]};t.set=function(a,b){this.store[a]=b;return this};
 ha(T.prototype);var ta={encode:sa,B:!1,C:""};const ua=/[\W_]+/,va=[H("[\u00e0\u00e1\u00e2\u00e3\u00e4\u00e5]"),"a",H("[\u00e8\u00e9\u00ea\u00eb]"),"e",H("[\u00ec\u00ed\u00ee\u00ef]"),"i",H("[\u00f2\u00f3\u00f4\u00f5\u00f6\u0151]"),"o",H("[\u00f9\u00fa\u00fb\u00fc\u0171]"),"u",H("[\u00fd\u0177\u00ff]"),"y",H("\u00f1"),"n",H("[\u00e7c]"),"k",H("\u00df"),"s",H(" & ")," and "];function sa(a){return ea(this,E(a).toLowerCase(),!a.normalize&&va,ua)};var xa={encode:wa,B:!1,C:"strict"};const ya=/[^a-z0-9]+/,za={b:"p",v:"f",w:"f",z:"s",x:"s","\u00df":"s",d:"t",n:"m",c:"k",g:"k",j:"k",q:"k",i:"e",y:"e",u:"o"};function wa(a){a=sa.call(this,a).join(" ");const b=[];if(a){const c=a.split(ya),e=c.length;for(let d=0,f,g=0;d<e;d++)if((a=c[d])&&(!this.filter||!this.filter[a])){f=a[0];let h=za[f]||f,k=h;for(let m=1;m<a.length;m++){f=a[m];const n=za[f]||f;n&&n!==k&&(h+=n,k=n)}b[g++]=h}}return b};var Ba={encode:Aa,B:!1,C:""};const Ca=[H("ae"),"a",H("oe"),"o",H("sh"),"s",H("th"),"t",H("ph"),"f",H("pf"),"f",H("(?![aeo])h(?![aeo])"),"",H("(?!^[aeo])h(?!^[aeo])"),""];function Aa(a,b){a&&(a=wa.call(this,a).join(" "),2<a.length&&(a=I(a,Ca)),b||(1<a.length&&(a=J(a)),a&&(a=a.split(" "))));return a};var Ea={encode:Da,B:!1,C:""};const Fa=H("(?!\\b)[aeo]");function Da(a){a&&(a=Aa.call(this,a,!0),1<a.length&&(a=a.replace(Fa,"")),1<a.length&&(a=J(a)),a&&(a=a.split(" ")));return a};L["latin:default"]=ca;L["latin:simple"]=ta;L["latin:balance"]=xa;L["latin:advanced"]=Ba;L["latin:extra"]=Ea;const X=self;let Y;const Z={Index:O,Document:T,Worker:null,registerCharset:function(a,b){L[a]=b},registerLanguage:function(a,b){fa[a]=b}};(Y=X.define)&&Y.amd?Y([],function(){return Z}):X.exports?X.exports=Z:X.FlexSearch=Z;}(this));
diff --git a/dist/flexsearch.debug.js b/dist/flexsearch.debug.js
index ece2bd2..ae35e94 100644
--- a/dist/flexsearch.debug.js
+++ b/dist/flexsearch.debug.js
@@ -758,7 +758,7 @@ R.prototype.search = function(a, b, c, d) {
     if (c.constructor === Array) {
       k = c, c = null;
     } else {
-      k = (g = c.pluck) || c.index || c.field || c;
+      k = (g = c.pluck) || c.index || c.field;
       m = c.tag;
       h = this.store && c.enrich;
       n = "and" === c.bool;
diff --git a/dist/flexsearch.es5.js b/dist/flexsearch.es5.js
index 3acbac4..8caa5cf 100644
--- a/dist/flexsearch.es5.js
+++ b/dist/flexsearch.es5.js
@@ -38,7 +38,7 @@ function X(a,b,c,d,f){a=a[f];if(d===c.length-1)b[f]=a;else if(a)if(a.constructor
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 t.remove=function(a){F(a)&&(a=W(a,this.key));if(this.register[a]){for(var b=0;b<this.h.length&&(this.index[this.h[b]].remove(a,!this.s),!this.o);b++);if(this.D&&!this.o)for(var c in this.l){b=this.l[c];var d=b.indexOf(a);-1!==d&&(1<b.length?b.splice(d,1):delete this.l[c])}this.store&&delete this.store[a];delete this.register[a]}return this};
-t.search=function(a,b,c,d){F(a)?(c=a,a=c.query):F(b)&&(c=b,b=0);var f=[],g=[],e,h=0;if(c)if(c.constructor===Array){var k=c;c=null}else{k=(e=c.pluck)||c.index||c.field||c;var l=c.tag;var p=this.store&&c.enrich;var n="and"===c.bool;b=c.limit||100;var m=c.offset||0;if(l&&(E(l)&&(l=[l]),!a)){g=0;for(e=void 0;g<l.length;g++)if(e=Ea.call(this,l[g],b,m,p))f[f.length]=e,h++;return h?f:[]}E(k)&&(k=[k])}k||(k=this.h);n=n&&(1<k.length||l&&1<l.length);for(var q=!d&&(this.s||this.async)&&[],r=0,u=void 0,A=void 0,
+t.search=function(a,b,c,d){F(a)?(c=a,a=c.query):F(b)&&(c=b,b=0);var f=[],g=[],e,h=0;if(c)if(c.constructor===Array){var k=c;c=null}else{k=(e=c.pluck)||c.index||c.field;var l=c.tag;var p=this.store&&c.enrich;var n="and"===c.bool;b=c.limit||100;var m=c.offset||0;if(l&&(E(l)&&(l=[l]),!a)){g=0;for(e=void 0;g<l.length;g++)if(e=Ea.call(this,l[g],b,m,p))f[f.length]=e,h++;return h?f:[]}E(k)&&(k=[k])}k||(k=this.h);n=n&&(1<k.length||l&&1<l.length);for(var q=!d&&(this.s||this.async)&&[],r=0,u=void 0,A=void 0,
 y=void 0;r<k.length;r++)if(y=void 0,A=k[r],E(A)||(y=A,A=A.field),q)q[r]=this.index[A].searchAsync(a,b,y||c);else{d?u=d[r]:u=this.index[A].search(a,b,y||c);y=u&&u.length;if(l&&y){var z=[],K=0;n&&(z[0]=[u]);var B=0,G=void 0;for(G=void 0;B<l.length;B++)if(G=l[B],y=(G=this.l[G])&&G.length)K++,z[z.length]=n?[G]:G;K&&(u=n?ta(z,b||100,m||0):ua(u,z),y=u.length)}if(y)g[h]=A,f[h++]=u;else if(n)return[]}if(q){var Ma=this;return new Promise(function(Na){Promise.all(q).then(function(Oa){Na(Ma.search(a,b,c,Oa))})})}if(!h)return[];
 if(e&&(!p||!this.store))return f[0];l=0;for(m=void 0;l<g.length;l++){m=f[l];m.length&&p&&(m=Fa.call(this,m));if(e)return m;f[l]={field:g[l],result:m}}return f};function Ea(a,b,c,d){var f=this.l[a],g=f&&f.length-c;if(g&&0<g){if(g>b||c)f=f.slice(c,c+b);d&&(f=Fa.call(this,f));return{tag:a,result:f}}}function Fa(a){for(var b=Array(a.length),c=0,d;c<a.length;c++)d=a[c],b[c]={id:d,doc:this.store[d]};return b}t.contain=function(a){return!!this.register[a]};t.get=function(a){return this.store[a]};
 t.set=function(a,b){this.store[a]=b;return this};t.searchCache=va;t.export=function(a,b,c,d,f){f||(f=0);d||(d=0);if(d<this.h.length){var g=this.h[d],e=this.index[g];b=this;setTimeout(function(){e.export(a,b,f?g.replace(":","-"):"",d,f++)||(d++,f=1,b.export(a,b,g,d,f))})}else{switch(f){case 1:c="tag";var h=this.l;break;case 2:c="store";h=this.store;break;default:return}xa(a,this,c,d,f,h)}};
diff --git a/dist/module/document.js b/dist/module/document.js
index bfef364..9e21d99 100644
--- a/dist/module/document.js
+++ b/dist/module/document.js
@@ -1 +1 @@
-import{SUPPORT_ASYNC,SUPPORT_CACHE,SUPPORT_SERIALIZE,SUPPORT_STORE,SUPPORT_TAGS,SUPPORT_WORKER}from"./config.js";import Index from"./index.js";import{DocumentInterface}from"./type.js";import Cache,{searchCache}from"./cache.js";import{create_object,is_array,is_string,is_object,parse_option,get_keys}from"./common.js";import apply_async from"./async.js";import{intersect,intersect_union}from"./intersect.js";import{exportDocument,importDocument}from"./serialize.js";import WorkerIndex from"./worker/index.js";function Document(a){if(!(this instanceof Document))return new Document(a);const b=a.document||a.doc||a;let c;this.tree=[],this.field=[],this.marker=[],this.register=create_object(),this.key=(c=b.key||b.id)&&parse_tree(c,this.marker)||"id",this.fastupdate=parse_option(a.fastupdate,!0),SUPPORT_STORE&&(this.storetree=(c=b.store)&&!0!==c&&[],this.store=c&&create_object()),SUPPORT_TAGS&&(this.tag=(c=b.tag)&&parse_tree(c,this.marker),this.tagindex=c&&create_object()),SUPPORT_CACHE&&(this.cache=(c=a.cache)&&new Cache(c),a.cache=!1),SUPPORT_WORKER&&(this.worker=a.worker),SUPPORT_ASYNC&&(this.async=!1),this.index=parse_descriptor.call(this,a,b)}export default Document;function parse_descriptor(a,b){const c=create_object();let d=b.index||b.field||b;is_string(d)&&(d=[d]);for(let e,f,g=0;g<d.length;g++)e=d[g],is_string(e)||(f=e,e=e.field),f=is_object(f)?Object.assign({},a,f):a,SUPPORT_WORKER&&this.worker&&(c[e]=new WorkerIndex(f),!c[e].worker&&(this.worker=!1)),this.worker||(c[e]=new Index(f,this.register)),this.tree[g]=parse_tree(e,this.marker),this.field[g]=e;if(SUPPORT_STORE&&this.storetree){let a=b.store;is_string(a)&&(a=[a]);for(let b=0;b<a.length;b++)this.storetree[b]=parse_tree(a[b],this.marker)}return c}function parse_tree(a,b){const c=a.split(":");let d=0;for(let e=0;e<c.length;e++)a=c[e],0<=a.indexOf("[]")&&(a=a.substring(0,a.length-2),a&&(b[d]=!0)),a&&(c[d++]=a);return d<c.length&&(c.length=d),1<d?c:c[0]}function parse_simple(a,b){if(is_string(b))a=a[b];else for(let c=0;a&&c<b.length;c++)a=a[b[c]];return a}function store_value(a,b,c,d,e){if(a=a[e],d===c.length-1)b[e]=a;else if(a)if(is_array(a)){b=b[e]=Array(a.length);for(let e=0;e<a.length;e++)store_value(a,b,c,d,e)}else b=b[e]||(b[e]=create_object()),e=c[++d],store_value(a,b,c,d,e)}function add_index(a,b,c,d,e,f,g,h){if(a=a[g],d===b.length-1){if(is_array(a)){if(c[d]){for(let b=0;b<a.length;b++)e.add(f,a[b],!0,!0);return}a=a.join(" ")}e.add(f,a,h,!0)}else if(a)if(is_array(a))for(let g=0;g<a.length;g++)add_index(a,b,c,d,e,f,g,h);else g=b[++d],add_index(a,b,c,d,e,f,g,h)}Document.prototype.add=function(a,b,c){if(is_object(a)&&(b=a,a=parse_simple(b,this.key)),b&&(a||0===a)){if(!c&&this.register[a])return this.update(a,b);for(let d,e,f=0;f<this.field.length;f++)e=this.field[f],d=this.tree[f],is_string(d)&&(d=[d]),add_index(b,d,this.marker,0,this.index[e],a,d[0],c);if(SUPPORT_TAGS&&this.tag){let d=parse_simple(b,this.tag),e=create_object();is_string(d)&&(d=[d]);for(let b,f,g=0;g<d.length;g++)if(b=d[g],!e[b]&&(e[b]=1,f=this.tagindex[b]||(this.tagindex[b]=[]),(!c||-1===f.indexOf(a))&&(f[f.length]=a,this.fastupdate))){const b=this.register[a]||(this.register[a]=[]);b[b.length]=f}}if(SUPPORT_STORE&&this.store&&(!c||!this.store[a])){let c;if(this.storetree){c=create_object();for(let a,d=0;d<this.storetree.length;d++)a=this.storetree[d],is_string(a)?c[a]=b[a]:store_value(b,c,a,0,a[0])}this.store[a]=c||b}}return this},Document.prototype.append=function(a,b){return this.add(a,b,!0)},Document.prototype.update=function(a,b){return this.remove(a).add(a,b)},Document.prototype.remove=function(a){if(is_object(a)&&(a=parse_simple(a,this.key)),this.register[a]){for(let b=0;b<this.field.length&&(this.index[this.field[b]].remove(a,!this.worker),!this.fastupdate);b++);if(SUPPORT_TAGS&&this.tag&&!this.fastupdate)for(let b in this.tagindex){const c=this.tagindex[b],d=c.indexOf(a);-1!==d&&(1<c.length?c.splice(d,1):delete this.tagindex[b])}SUPPORT_STORE&&this.store&&delete this.store[a],delete this.register[a]}return this},Document.prototype.search=function(a,b,c,d){is_object(a)?(c=a,a=c.query):is_object(b)&&(c=b,b=0);let e,f,g,h,j,k,l=[],m=[],n=0;if(c)if(is_array(c))g=c,c=null;else{if(e=c.pluck,g=e||c.index||c.field||c,h=SUPPORT_TAGS&&c.tag,f=SUPPORT_STORE&&this.store&&c.enrich,j="and"===c.bool,b=c.limit||100,k=c.offset||0,h&&(is_string(h)&&(h=[h]),!a)){for(let a,c=0;c<h.length;c++)a=get_tag.call(this,h[c],b,k,f),a&&(l[l.length]=a,n++);return n?l:[]}is_string(g)&&(g=[g])}g||(g=this.field),j=j&&(1<g.length||h&&1<h.length);const o=!d&&(this.worker||this.async)&&[];for(let e,f,p,q=0;q<g.length;q++){let i;if(f=g[q],is_string(f)||(i=f,f=f.field),o){o[q]=this.index[f].searchAsync(a,b,i||c);continue}else e=d?d[q]:this.index[f].search(a,b,i||c);if(p=e&&e.length,h&&p){const a=[];let c=0;j&&(a[0]=[e]);for(let b,d,e=0;e<h.length;e++)b=h[e],d=this.tagindex[b],p=d&&d.length,p&&(c++,a[a.length]=j?[d]:d);c&&(e=j?intersect(a,b||100,k||0):intersect_union(e,a),p=e.length)}if(p)m[n]=f,l[n++]=e;else if(j)return[]}if(o){const d=this;return new Promise(function(e){Promise.all(o).then(function(f){e(d.search(a,b,c,f))})})}if(!n)return[];if(e&&(!f||!this.store))return l[0];for(let g,h=0;h<m.length;h++){if(g=l[h],g.length&&f&&(g=apply_enrich.call(this,g)),e)return g;l[h]={field:m[h],result:g}}return l};function get_tag(a,b,c,d){let e=this.tagindex[a],f=e&&e.length-c;if(f&&0<f)return(f>b||c)&&(e=e.slice(c,c+b)),d&&(e=apply_enrich.call(this,e)),{tag:a,result:e}}function apply_enrich(a){const b=Array(a.length);for(let c,d=0;d<a.length;d++)c=a[d],b[d]={id:c,doc:this.store[c]};return b}Document.prototype.contain=function(a){return!!this.register[a]},SUPPORT_STORE&&(Document.prototype.get=function(a){return this.store[a]},Document.prototype.set=function(a,b){return this.store[a]=b,this}),SUPPORT_CACHE&&(Document.prototype.searchCache=searchCache),SUPPORT_SERIALIZE&&(Document.prototype.export=exportDocument,Document.prototype.import=importDocument),SUPPORT_ASYNC&&apply_async(Document.prototype);
\ No newline at end of file
+import{SUPPORT_ASYNC,SUPPORT_CACHE,SUPPORT_SERIALIZE,SUPPORT_STORE,SUPPORT_TAGS,SUPPORT_WORKER}from"./config.js";import Index from"./index.js";import{DocumentInterface}from"./type.js";import Cache,{searchCache}from"./cache.js";import{create_object,is_array,is_string,is_object,parse_option,get_keys}from"./common.js";import apply_async from"./async.js";import{intersect,intersect_union}from"./intersect.js";import{exportDocument,importDocument}from"./serialize.js";import WorkerIndex from"./worker/index.js";function Document(a){if(!(this instanceof Document))return new Document(a);const b=a.document||a.doc||a;let c;this.tree=[],this.field=[],this.marker=[],this.register=create_object(),this.key=(c=b.key||b.id)&&parse_tree(c,this.marker)||"id",this.fastupdate=parse_option(a.fastupdate,!0),SUPPORT_STORE&&(this.storetree=(c=b.store)&&!0!==c&&[],this.store=c&&create_object()),SUPPORT_TAGS&&(this.tag=(c=b.tag)&&parse_tree(c,this.marker),this.tagindex=c&&create_object()),SUPPORT_CACHE&&(this.cache=(c=a.cache)&&new Cache(c),a.cache=!1),SUPPORT_WORKER&&(this.worker=a.worker),SUPPORT_ASYNC&&(this.async=!1),this.index=parse_descriptor.call(this,a,b)}export default Document;function parse_descriptor(a,b){const c=create_object();let d=b.index||b.field||b;is_string(d)&&(d=[d]);for(let e,f,g=0;g<d.length;g++)e=d[g],is_string(e)||(f=e,e=e.field),f=is_object(f)?Object.assign({},a,f):a,SUPPORT_WORKER&&this.worker&&(c[e]=new WorkerIndex(f),!c[e].worker&&(this.worker=!1)),this.worker||(c[e]=new Index(f,this.register)),this.tree[g]=parse_tree(e,this.marker),this.field[g]=e;if(SUPPORT_STORE&&this.storetree){let a=b.store;is_string(a)&&(a=[a]);for(let b=0;b<a.length;b++)this.storetree[b]=parse_tree(a[b],this.marker)}return c}function parse_tree(a,b){const c=a.split(":");let d=0;for(let e=0;e<c.length;e++)a=c[e],0<=a.indexOf("[]")&&(a=a.substring(0,a.length-2),a&&(b[d]=!0)),a&&(c[d++]=a);return d<c.length&&(c.length=d),1<d?c:c[0]}function parse_simple(a,b){if(is_string(b))a=a[b];else for(let c=0;a&&c<b.length;c++)a=a[b[c]];return a}function store_value(a,b,c,d,e){if(a=a[e],d===c.length-1)b[e]=a;else if(a)if(is_array(a)){b=b[e]=Array(a.length);for(let e=0;e<a.length;e++)store_value(a,b,c,d,e)}else b=b[e]||(b[e]=create_object()),e=c[++d],store_value(a,b,c,d,e)}function add_index(a,b,c,d,e,f,g,h){if(a=a[g],d===b.length-1){if(is_array(a)){if(c[d]){for(let b=0;b<a.length;b++)e.add(f,a[b],!0,!0);return}a=a.join(" ")}e.add(f,a,h,!0)}else if(a)if(is_array(a))for(let g=0;g<a.length;g++)add_index(a,b,c,d,e,f,g,h);else g=b[++d],add_index(a,b,c,d,e,f,g,h)}Document.prototype.add=function(a,b,c){if(is_object(a)&&(b=a,a=parse_simple(b,this.key)),b&&(a||0===a)){if(!c&&this.register[a])return this.update(a,b);for(let d,e,f=0;f<this.field.length;f++)e=this.field[f],d=this.tree[f],is_string(d)&&(d=[d]),add_index(b,d,this.marker,0,this.index[e],a,d[0],c);if(SUPPORT_TAGS&&this.tag){let d=parse_simple(b,this.tag),e=create_object();is_string(d)&&(d=[d]);for(let b,f,g=0;g<d.length;g++)if(b=d[g],!e[b]&&(e[b]=1,f=this.tagindex[b]||(this.tagindex[b]=[]),(!c||-1===f.indexOf(a))&&(f[f.length]=a,this.fastupdate))){const b=this.register[a]||(this.register[a]=[]);b[b.length]=f}}if(SUPPORT_STORE&&this.store&&(!c||!this.store[a])){let c;if(this.storetree){c=create_object();for(let a,d=0;d<this.storetree.length;d++)a=this.storetree[d],is_string(a)?c[a]=b[a]:store_value(b,c,a,0,a[0])}this.store[a]=c||b}}return this},Document.prototype.append=function(a,b){return this.add(a,b,!0)},Document.prototype.update=function(a,b){return this.remove(a).add(a,b)},Document.prototype.remove=function(a){if(is_object(a)&&(a=parse_simple(a,this.key)),this.register[a]){for(let b=0;b<this.field.length&&(this.index[this.field[b]].remove(a,!this.worker),!this.fastupdate);b++);if(SUPPORT_TAGS&&this.tag&&!this.fastupdate)for(let b in this.tagindex){const c=this.tagindex[b],d=c.indexOf(a);-1!==d&&(1<c.length?c.splice(d,1):delete this.tagindex[b])}SUPPORT_STORE&&this.store&&delete this.store[a],delete this.register[a]}return this},Document.prototype.search=function(a,b,c,d){is_object(a)?(c=a,a=c.query):is_object(b)&&(c=b,b=0);let e,f,g,h,j,k,l=[],m=[],n=0;if(c)if(is_array(c))g=c,c=null;else{if(e=c.pluck,g=e||c.index||c.field,h=SUPPORT_TAGS&&c.tag,f=SUPPORT_STORE&&this.store&&c.enrich,j="and"===c.bool,b=c.limit||100,k=c.offset||0,h&&(is_string(h)&&(h=[h]),!a)){for(let a,c=0;c<h.length;c++)a=get_tag.call(this,h[c],b,k,f),a&&(l[l.length]=a,n++);return n?l:[]}is_string(g)&&(g=[g])}g||(g=this.field),j=j&&(1<g.length||h&&1<h.length);const o=!d&&(this.worker||this.async)&&[];for(let e,f,p,q=0;q<g.length;q++){let i;if(f=g[q],is_string(f)||(i=f,f=f.field),o){o[q]=this.index[f].searchAsync(a,b,i||c);continue}else e=d?d[q]:this.index[f].search(a,b,i||c);if(p=e&&e.length,h&&p){const a=[];let c=0;j&&(a[0]=[e]);for(let b,d,e=0;e<h.length;e++)b=h[e],d=this.tagindex[b],p=d&&d.length,p&&(c++,a[a.length]=j?[d]:d);c&&(e=j?intersect(a,b||100,k||0):intersect_union(e,a),p=e.length)}if(p)m[n]=f,l[n++]=e;else if(j)return[]}if(o){const d=this;return new Promise(function(e){Promise.all(o).then(function(f){e(d.search(a,b,c,f))})})}if(!n)return[];if(e&&(!f||!this.store))return l[0];for(let g,h=0;h<m.length;h++){if(g=l[h],g.length&&f&&(g=apply_enrich.call(this,g)),e)return g;l[h]={field:m[h],result:g}}return l};function get_tag(a,b,c,d){let e=this.tagindex[a],f=e&&e.length-c;if(f&&0<f)return(f>b||c)&&(e=e.slice(c,c+b)),d&&(e=apply_enrich.call(this,e)),{tag:a,result:e}}function apply_enrich(a){const b=Array(a.length);for(let c,d=0;d<a.length;d++)c=a[d],b[d]={id:c,doc:this.store[c]};return b}Document.prototype.contain=function(a){return!!this.register[a]},SUPPORT_STORE&&(Document.prototype.get=function(a){return this.store[a]},Document.prototype.set=function(a,b){return this.store[a]=b,this}),SUPPORT_CACHE&&(Document.prototype.searchCache=searchCache),SUPPORT_SERIALIZE&&(Document.prototype.export=exportDocument,Document.prototype.import=importDocument),SUPPORT_ASYNC&&apply_async(Document.prototype);
\ No newline at end of file
diff --git a/package.json b/package.json
index eb80593..7b06cba 100644
--- a/package.json
+++ b/package.json
@@ -29,7 +29,7 @@
   },
   "scripts": {
     "copy": "npm run clean && cpx \"src/**\" tmp/",
-    "clean": "if exist tmp rmdir tmp /s /q && mkdir tmp",
+    "clean": "npx shx rm -rf tmp && mkdir tmp",
     "build": "npm run copy && npm run build:bundle",
     "build:bundle": "node task/build RELEASE=bundle && cpx \"src/worker/node.js\" dist/node/",
     "build:debug": "node task/build RELEASE=debug COMPILATION_LEVEL=SIMPLE FORMATTING=PRETTY_PRINT",
@@ -71,6 +71,7 @@
     "babel-plugin-transform-simplify-comparison-operators": "^6.9.4",
     "babel-plugin-transform-undefined-to-void": "^6.9.4",
     "cpx": "^1.5.0",
+    "shx": "^0.3.3",
     "google-closure-compiler": "^20210604.0.0-nightly",
     "web-servo": "^0.5.1"
   }
diff --git a/src/document.js b/src/document.js
index f6cdf5a..c721bc6 100644
--- a/src/document.js
+++ b/src/document.js
@@ -495,7 +495,7 @@ Document.prototype.search = function(query, limit, options, _resolve){
         else{
 
             pluck = options["pluck"];
-            field = pluck || options["index"] || options["field"] || options;
+            field = pluck || options["index"] || options["field"];
             tag = SUPPORT_TAGS && options["tag"];
             enrich = SUPPORT_STORE && this.store && options["enrich"];
             bool = options["bool"] === "and";
diff --git a/task/build.js b/task/build.js
index a047711..48ca7a8 100644
--- a/task/build.js
+++ b/task/build.js
@@ -159,7 +159,7 @@ let parameter = (function(opt){
     rewrite_polyfills: use_polyfill || false,
 
     // isolation_mode: "IIFE",
-    output_wrapper: /*release === "lang" ? "%output%" :*/ "(function(self){%output%}(this));"
+    output_wrapper: /*release === "lang" ? "%output%" :*/ "\"(function(self){%output%}(this));\""
 
     //formatting: "PRETTY_PRINT"
 });