libjs-backbone 0.9.10-3 / usr / share / javascript / backbone / backbone.min.js

(function(){var root=this;var previousBackbone=root.Backbone;var array=[];var push=array.push;var slice=array.slice;var splice=array.splice;var Backbone;if(typeof exports!=="undefined"){Backbone=exports}else{Backbone=root.Backbone={}}Backbone.VERSION="0.9.10";var _=root._;if(!_&&typeof require!=="undefined")_=require("underscore");Backbone.$=root.jQuery||root.Zepto||root.ender;Backbone.noConflict=function(){root.Backbone=previousBackbone;return this};Backbone.emulateHTTP=false;Backbone.emulateJSON=false;var eventSplitter=/\s+/;var eventsApi=function(obj,action,name,rest){if(!name)return true;if(typeof name==="object"){for(var key in name){obj[action].apply(obj,[key,name[key]].concat(rest))}}else if(eventSplitter.test(name)){var names=name.split(eventSplitter);for(var i=0,l=names.length;i<l;i++){obj[action].apply(obj,[names[i]].concat(rest))}}else{return true}};var triggerEvents=function(events,args){var ev,i=-1,l=events.length;switch(args.length){case 0:while(++i<l)(ev=events[i]).callback.call(ev.ctx);return;case 1:while(++i<l)(ev=events[i]).callback.call(ev.ctx,args[0]);return;case 2:while(++i<l)(ev=events[i]).callback.call(ev.ctx,args[0],args[1]);return;case 3:while(++i<l)(ev=events[i]).callback.call(ev.ctx,args[0],args[1],args[2]);return;default:while(++i<l)(ev=events[i]).callback.apply(ev.ctx,args)}};var Events=Backbone.Events={on:function(name,callback,context){if(!(eventsApi(this,"on",name,[callback,context])&&callback))return this;this._events||(this._events={});var list=this._events[name]||(this._events[name]=[]);list.push({callback:callback,context:context,ctx:context||this});return this},once:function(name,callback,context){if(!(eventsApi(this,"once",name,[callback,context])&&callback))return this;var self=this;var once=_.once(function(){self.off(name,once);callback.apply(this,arguments)});once._callback=callback;this.on(name,once,context);return this},off:function(name,callback,context){var list,ev,events,names,i,l,j,k;if(!this._events||!eventsApi(this,"off",name,[callback,context]))return this;if(!name&&!callback&&!context){this._events={};return this}names=name?[name]:_.keys(this._events);for(i=0,l=names.length;i<l;i++){name=names[i];if(list=this._events[name]){events=[];if(callback||context){for(j=0,k=list.length;j<k;j++){ev=list[j];if(callback&&callback!==ev.callback&&callback!==ev.callback._callback||context&&context!==ev.context){events.push(ev)}}}this._events[name]=events}}return this},trigger:function(name){if(!this._events)return this;var args=slice.call(arguments,1);if(!eventsApi(this,"trigger",name,args))return this;var events=this._events[name];var allEvents=this._events.all;if(events)triggerEvents(events,args);if(allEvents)triggerEvents(allEvents,arguments);return this},listenTo:function(obj,name,callback){var listeners=this._listeners||(this._listeners={});var id=obj._listenerId||(obj._listenerId=_.uniqueId("l"));listeners[id]=obj;obj.on(name,typeof name==="object"?this:callback,this);return this},stopListening:function(obj,name,callback){var listeners=this._listeners;if(!listeners)return;if(obj){obj.off(name,typeof name==="object"?this:callback,this);if(!name&&!callback)delete listeners[obj._listenerId]}else{if(typeof name==="object")callback=this;for(var id in listeners){listeners[id].off(name,callback,this)}this._listeners={}}return this}};Events.bind=Events.on;Events.unbind=Events.off;_.extend(Backbone,Events);var Model=Backbone.Model=function(attributes,options){var defaults;var attrs=attributes||{};this.cid=_.uniqueId("c");this.attributes={};if(options&&options.collection)this.collection=options.collection;if(options&&options.parse)attrs=this.parse(attrs,options)||{};if(defaults=_.result(this,"defaults")){attrs=_.defaults({},attrs,defaults)}this.set(attrs,options);this.changed={};this.initialize.apply(this,arguments)};_.extend(Model.prototype,Events,{changed:null,idAttribute:"id",initialize:function(){},toJSON:function(options){return _.clone(this.attributes)},sync:function(){return Backbone.sync.apply(this,arguments)},get:function(attr){return this.attributes[attr]},escape:function(attr){return _.escape(this.get(attr))},has:function(attr){return this.get(attr)!=null},set:function(key,val,options){var attr,attrs,unset,changes,silent,changing,prev,current;if(key==null)return this;if(typeof key==="object"){attrs=key;options=val}else{(attrs={})[key]=val}options||(options={});if(!this._validate(attrs,options))return false;unset=options.unset;silent=options.silent;changes=[];changing=this._changing;this._changing=true;if(!changing){this._previousAttributes=_.clone(this.attributes);this.changed={}}current=this.attributes,prev=this._previousAttributes;if(this.idAttribute in attrs)this.id=attrs[this.idAttribute];for(attr in attrs){val=attrs[attr];if(!_.isEqual(current[attr],val))changes.push(attr);if(!_.isEqual(prev[attr],val)){this.changed[attr]=val}else{delete this.changed[attr]}unset?delete current[attr]:current[attr]=val}if(!silent){if(changes.length)this._pending=true;for(var i=0,l=changes.length;i<l;i++){this.trigger("change:"+changes[i],this,current[changes[i]],options)}}if(changing)return this;if(!silent){while(this._pending){this._pending=false;this.trigger("change",this,options)}}this._pending=false;this._changing=false;return this},unset:function(attr,options){return this.set(attr,void 0,_.extend({},options,{unset:true}))},clear:function(options){var attrs={};for(var key in this.attributes)attrs[key]=void 0;return this.set(attrs,_.extend({},options,{unset:true}))},hasChanged:function(attr){if(attr==null)return!_.isEmpty(this.changed);return _.has(this.changed,attr)},changedAttributes:function(diff){if(!diff)return this.hasChanged()?_.clone(this.changed):false;var val,changed=false;var old=this._changing?this._previousAttributes:this.attributes;for(var attr in diff){if(_.isEqual(old[attr],val=diff[attr]))continue;(changed||(changed={}))[attr]=val}return changed},previous:function(attr){if(attr==null||!this._previousAttributes)return null;return this._previousAttributes[attr]},previousAttributes:function(){return _.clone(this._previousAttributes)},fetch:function(options){options=options?_.clone(options):{};if(options.parse===void 0)options.parse=true;var success=options.success;options.success=function(model,resp,options){if(!model.set(model.parse(resp,options),options))return false;if(success)success(model,resp,options)};return this.sync("read",this,options)},save:function(key,val,options){var attrs,success,method,xhr,attributes=this.attributes;if(key==null||typeof key==="object"){attrs=key;options=val}else{(attrs={})[key]=val}if(attrs&&(!options||!options.wait)&&!this.set(attrs,options))return false;options=_.extend({validate:true},options);if(!this._validate(attrs,options))return false;if(attrs&&options.wait){this.attributes=_.extend({},attributes,attrs)}if(options.parse===void 0)options.parse=true;success=options.success;options.success=function(model,resp,options){model.attributes=attributes;var serverAttrs=model.parse(resp,options);if(options.wait)serverAttrs=_.extend(attrs||{},serverAttrs);if(_.isObject(serverAttrs)&&!model.set(serverAttrs,options)){return false}if(success)success(model,resp,options)};method=this.isNew()?"create":options.patch?"patch":"update";if(method==="patch")options.attrs=attrs;xhr=this.sync(method,this,options);if(attrs&&options.wait)this.attributes=attributes;return xhr},destroy:function(options){options=options?_.clone(options):{};var model=this;var success=options.success;var destroy=function(){model.trigger("destroy",model,model.collection,options)};options.success=function(model,resp,options){if(options.wait||model.isNew())destroy();if(success)success(model,resp,options)};if(this.isNew()){options.success(this,null,options);return false}var xhr=this.sync("delete",this,options);if(!options.wait)destroy();return xhr},url:function(){var base=_.result(this,"urlRoot")||_.result(this.collection,"url")||urlError();if(this.isNew())return base;return base+(base.charAt(base.length-1)==="/"?"":"/")+encodeURIComponent(this.id)},parse:function(resp,options){return resp},clone:function(){return new this.constructor(this.attributes)},isNew:function(){return this.id==null},isValid:function(options){return!this.validate||!this.validate(this.attributes,options)},_validate:function(attrs,options){if(!options.validate||!this.validate)return true;attrs=_.extend({},this.attributes,attrs);var error=this.validationError=this.validate(attrs,options)||null;if(!error)return true;this.trigger("invalid",this,error,options||{});return false}});var Collection=Backbone.Collection=function(models,options){options||(options={});if(options.model)this.model=options.model;if(options.comparator!==void 0)this.comparator=options.comparator;this.models=[];this._reset();this.initialize.apply(this,arguments);if(models)this.reset(models,_.extend({silent:true},options))};_.extend(Collection.prototype,Events,{model:Model,initialize:function(){},toJSON:function(options){return this.map(function(model){return model.toJSON(options)})},sync:function(){return Backbone.sync.apply(this,arguments)},add:function(models,options){models=_.isArray(models)?models.slice():[models];options||(options={});var i,l,model,attrs,existing,doSort,add,at,sort,sortAttr;add=[];at=options.at;sort=this.comparator&&at==null&&options.sort!=false;sortAttr=_.isString(this.comparator)?this.comparator:null;for(i=0,l=models.length;i<l;i++){if(!(model=this._prepareModel(attrs=models[i],options))){this.trigger("invalid",this,attrs,options);continue}if(existing=this.get(model)){if(options.merge){existing.set(attrs===model?model.attributes:attrs,options);if(sort&&!doSort&&existing.hasChanged(sortAttr))doSort=true}continue}add.push(model);model.on("all",this._onModelEvent,this);this._byId[model.cid]=model;if(model.id!=null)this._byId[model.id]=model}if(add.length){if(sort)doSort=true;this.length+=add.length;if(at!=null){splice.apply(this.models,[at,0].concat(add))}else{push.apply(this.models,add)}}if(doSort)this.sort({silent:true});if(options.silent)return this;for(i=0,l=add.length;i<l;i++){(model=add[i]).trigger("add",model,this,options)}if(doSort)this.trigger("sort",this,options);return this},remove:function(models,options){models=_.isArray(models)?models.slice():[models];options||(options={});var i,l,index,model;for(i=0,l=models.length;i<l;i++){model=this.get(models[i]);if(!model)continue;delete this._byId[model.id];delete this._byId[model.cid];index=this.indexOf(model);this.models.splice(index,1);this.length--;if(!options.silent){options.index=index;model.trigger("remove",model,this,options)}this._removeReference(model)}return this},push:function(model,options){model=this._prepareModel(model,options);this.add(model,_.extend({at:this.length},options));return model},pop:function(options){var model=this.at(this.length-1);this.remove(model,options);return model},unshift:function(model,options){model=this._prepareModel(model,options);this.add(model,_.extend({at:0},options));return model},shift:function(options){var model=this.at(0);this.remove(model,options);return model},slice:function(begin,end){return this.models.slice(begin,end)},get:function(obj){if(obj==null)return void 0;this._idAttr||(this._idAttr=this.model.prototype.idAttribute);return this._byId[obj.id||obj.cid||obj[this._idAttr]||obj]},at:function(index){return this.models[index]},where:function(attrs){if(_.isEmpty(attrs))return[];return this.filter(function(model){for(var key in attrs){if(attrs[key]!==model.get(key))return false}return true})},sort:function(options){if(!this.comparator){throw new Error("Cannot sort a set without a comparator")}options||(options={});if(_.isString(this.comparator)||this.comparator.length===1){this.models=this.sortBy(this.comparator,this)}else{this.models.sort(_.bind(this.comparator,this))}if(!options.silent)this.trigger("sort",this,options);return this},pluck:function(attr){return _.invoke(this.models,"get",attr)},update:function(models,options){options=_.extend({add:true,merge:true,remove:true},options);if(options.parse)models=this.parse(models,options);var model,i,l,existing;var add=[],remove=[],modelMap={};if(!_.isArray(models))models=models?[models]:[];if(options.add&&!options.remove)return this.add(models,options);for(i=0,l=models.length;i<l;i++){model=models[i];existing=this.get(model);if(options.remove&&existing)modelMap[existing.cid]=true;if(options.add&&!existing||options.merge&&existing){add.push(model)}}if(options.remove){for(i=0,l=this.models.length;i<l;i++){model=this.models[i];if(!modelMap[model.cid])remove.push(model)}}if(remove.length)this.remove(remove,options);if(add.length)this.add(add,options);return this},reset:function(models,options){options||(options={});if(options.parse)models=this.parse(models,options);for(var i=0,l=this.models.length;i<l;i++){this._removeReference(this.models[i])}options.previousModels=this.models.slice();this._reset();if(models)this.add(models,_.extend({silent:true},options));if(!options.silent)this.trigger("reset",this,options);return this},fetch:function(options){options=options?_.clone(options):{};if(options.parse===void 0)options.parse=true;var success=options.success;options.success=function(collection,resp,options){var method=options.update?"update":"reset";collection[method](resp,options);if(success)success(collection,resp,options)};return this.sync("read",this,options)},create:function(model,options){options=options?_.clone(options):{};if(!(model=this._prepareModel(model,options)))return false;if(!options.wait)this.add(model,options);var collection=this;var success=options.success;options.success=function(model,resp,options){if(options.wait)collection.add(model,options);if(success)success(model,resp,options)};model.save(null,options);return model},parse:function(resp,options){return resp},clone:function(){return new this.constructor(this.models)},_reset:function(){this.length=0;this.models.length=0;this._byId={}},_prepareModel:function(attrs,options){if(attrs instanceof Model){if(!attrs.collection)attrs.collection=this;return attrs}options||(options={});options.collection=this;var model=new this.model(attrs,options);if(!model._validate(attrs,options))return false;return model},_removeReference:function(model){if(this===model.collection)delete model.collection;model.off("all",this._onModelEvent,this)},_onModelEvent:function(event,model,collection,options){if((event==="add"||event==="remove")&&collection!==this)return;if(event==="destroy")this.remove(model,options);if(model&&event==="change:"+model.idAttribute){delete this._byId[model.previous(model.idAttribute)];if(model.id!=null)this._byId[model.id]=model}this.trigger.apply(this,arguments)},sortedIndex:function(model,value,context){value||(value=this.comparator);var iterator=_.isFunction(value)?value:function(model){return model.get(value)};return _.sortedIndex(this.models,model,iterator,context)}});var methods=["forEach","each","map","collect","reduce","foldl","inject","reduceRight","foldr","find","detect","filter","select","reject","every","all","some","any","include","contains","invoke","max","min","toArray","size","first","head","take","initial","rest","tail","drop","last","without","indexOf","shuffle","lastIndexOf","isEmpty","chain"];_.each(methods,function(method){Collection.prototype[method]=function(){var args=slice.call(arguments);args.unshift(this.models);return _[method].apply(_,args)}});var attributeMethods=["groupBy","countBy","sortBy"];_.each(attributeMethods,function(method){Collection.prototype[method]=function(value,context){var iterator=_.isFunction(value)?value:function(model){return model.get(value)};return _[method](this.models,iterator,context)}});var Router=Backbone.Router=function(options){options||(options={});if(options.routes)this.routes=options.routes;this._bindRoutes();this.initialize.apply(this,arguments)};var optionalParam=/\((.*?)\)/g;var namedParam=/(\(\?)?:\w+/g;var splatParam=/\*\w+/g;var escapeRegExp=/[\-{}\[\]+?.,\\\^$|#\s]/g;_.extend(Router.prototype,Events,{initialize:function(){},route:function(route,name,callback){if(!_.isRegExp(route))route=this._routeToRegExp(route);if(!callback)callback=this[name];Backbone.history.route(route,_.bind(function(fragment){var args=this._extractParameters(route,fragment);callback&&callback.apply(this,args);this.trigger.apply(this,["route:"+name].concat(args));this.trigger("route",name,args);Backbone.history.trigger("route",this,name,args)},this));return this},navigate:function(fragment,options){Backbone.history.navigate(fragment,options);return this},_bindRoutes:function(){if(!this.routes)return;var route,routes=_.keys(this.routes);while((route=routes.pop())!=null){this.route(route,this.routes[route])}},_routeToRegExp:function(route){route=route.replace(escapeRegExp,"\\$&").replace(optionalParam,"(?:$1)?").replace(namedParam,function(match,optional){return optional?match:"([^/]+)"}).replace(splatParam,"(.*?)");return new RegExp("^"+route+"$")},_extractParameters:function(route,fragment){return route.exec(fragment).slice(1)}});var History=Backbone.History=function(){this.handlers=[];_.bindAll(this,"checkUrl");if(typeof window!=="undefined"){this.location=window.location;this.history=window.history}};var routeStripper=/^[#\/]|\s+$/g;var rootStripper=/^\/+|\/+$/g;var isExplorer=/msie [\w.]+/;var trailingSlash=/\/$/;History.started=false;_.extend(History.prototype,Events,{interval:50,getHash:function(window){var match=(window||this).location.href.match(/#(.*)$/);return match?match[1]:""},getFragment:function(fragment,forcePushState){if(fragment==null){if(this._hasPushState||!this._wantsHashChange||forcePushState){fragment=this.location.pathname;var root=this.root.replace(trailingSlash,"");if(!fragment.indexOf(root))fragment=fragment.substr(root.length)}else{fragment=this.getHash()}}return fragment.replace(routeStripper,"")},start:function(options){if(History.started)throw new Error("Backbone.history has already been started");History.started=true;this.options=_.extend({},{root:"/"},this.options,options);this.root=this.options.root;this._wantsHashChange=this.options.hashChange!==false;this._wantsPushState=!!this.options.pushState;this._hasPushState=!!(this.options.pushState&&this.history&&this.history.pushState);var fragment=this.getFragment();var docMode=document.documentMode;var oldIE=isExplorer.exec(navigator.userAgent.toLowerCase())&&(!docMode||docMode<=7);this.root=("/"+this.root+"/").replace(rootStripper,"/");if(oldIE&&this._wantsHashChange){this.iframe=Backbone.$('<iframe src="javascript:0" tabindex="-1" />').hide().appendTo("body")[0].contentWindow;this.navigate(fragment)}if(this._hasPushState){Backbone.$(window).on("popstate",this.checkUrl)}else if(this._wantsHashChange&&"onhashchange"in window&&!oldIE){Backbone.$(window).on("hashchange",this.checkUrl)}else if(this._wantsHashChange){this._checkUrlInterval=setInterval(this.checkUrl,this.interval)}this.fragment=fragment;var loc=this.location;var atRoot=loc.pathname.replace(/[^\/]$/,"$&/")===this.root;if(this._wantsHashChange&&this._wantsPushState&&!this._hasPushState&&!atRoot){this.fragment=this.getFragment(null,true);this.location.replace(this.root+this.location.search+"#"+this.fragment);return true}else if(this._wantsPushState&&this._hasPushState&&atRoot&&loc.hash){this.fragment=this.getHash().replace(routeStripper,"");this.history.replaceState({},document.title,this.root+this.fragment+loc.search)}if(!this.options.silent)return this.loadUrl()},stop:function(){Backbone.$(window).off("popstate",this.checkUrl).off("hashchange",this.checkUrl);clearInterval(this._checkUrlInterval);History.started=false},route:function(route,callback){this.handlers.unshift({route:route,callback:callback})},checkUrl:function(e){var current=this.getFragment();if(current===this.fragment&&this.iframe){current=this.getFragment(this.getHash(this.iframe))}if(current===this.fragment)return false;if(this.iframe)this.navigate(current);this.loadUrl()||this.loadUrl(this.getHash())},loadUrl:function(fragmentOverride){var fragment=this.fragment=this.getFragment(fragmentOverride);var matched=_.any(this.handlers,function(handler){if(handler.route.test(fragment)){handler.callback(fragment);return true}});return matched},navigate:function(fragment,options){if(!History.started)return false;if(!options||options===true)options={trigger:options};fragment=this.getFragment(fragment||"");if(this.fragment===fragment)return;this.fragment=fragment;var url=this.root+fragment;if(this._hasPushState){this.history[options.replace?"replaceState":"pushState"]({},document.title,url)}else if(this._wantsHashChange){this._updateHash(this.location,fragment,options.replace);if(this.iframe&&fragment!==this.getFragment(this.getHash(this.iframe))){if(!options.replace)this.iframe.document.open().close();this._updateHash(this.iframe.location,fragment,options.replace)}}else{return this.location.assign(url)}if(options.trigger)this.loadUrl(fragment)},_updateHash:function(location,fragment,replace){if(replace){var href=location.href.replace(/(javascript:|#).*$/,"");location.replace(href+"#"+fragment)}else{location.hash="#"+fragment}}});Backbone.history=new History;var View=Backbone.View=function(options){this.cid=_.uniqueId("view");this._configure(options||{});this._ensureElement();this.initialize.apply(this,arguments);this.delegateEvents()};var delegateEventSplitter=/^(\S+)\s*(.*)$/;var viewOptions=["model","collection","el","id","attributes","className","tagName","events"];_.extend(View.prototype,Events,{tagName:"div",$:function(selector){return this.$el.find(selector)},initialize:function(){},render:function(){return this},remove:function(){this.$el.remove();this.stopListening();return this},setElement:function(element,delegate){if(this.$el)this.undelegateEvents();this.$el=element instanceof Backbone.$?element:Backbone.$(element);this.el=this.$el[0];if(delegate!==false)this.delegateEvents();return this},delegateEvents:function(events){if(!(events||(events=_.result(this,"events"))))return;this.undelegateEvents();for(var key in events){var method=events[key];if(!_.isFunction(method))method=this[events[key]];if(!method)throw new Error('Method "'+events[key]+'" does not exist');var match=key.match(delegateEventSplitter);var eventName=match[1],selector=match[2];method=_.bind(method,this);eventName+=".delegateEvents"+this.cid;if(selector===""){this.$el.on(eventName,method)}else{this.$el.on(eventName,selector,method)}}},undelegateEvents:function(){this.$el.off(".delegateEvents"+this.cid)},_configure:function(options){if(this.options)options=_.extend({},_.result(this,"options"),options);_.extend(this,_.pick(options,viewOptions));this.options=options},_ensureElement:function(){if(!this.el){var attrs=_.extend({},_.result(this,"attributes"));if(this.id)attrs.id=_.result(this,"id");if(this.className)attrs["class"]=_.result(this,"className");var $el=Backbone.$("<"+_.result(this,"tagName")+">").attr(attrs);this.setElement($el,false)}else{this.setElement(_.result(this,"el"),false)}}});var methodMap={create:"POST",update:"PUT",patch:"PATCH","delete":"DELETE",read:"GET"};Backbone.sync=function(method,model,options){var type=methodMap[method];_.defaults(options||(options={}),{emulateHTTP:Backbone.emulateHTTP,emulateJSON:Backbone.emulateJSON});var params={type:type,dataType:"json"};if(!options.url){params.url=_.result(model,"url")||urlError()}if(options.data==null&&model&&(method==="create"||method==="update"||method==="patch")){params.contentType="application/json";params.data=JSON.stringify(options.attrs||model.toJSON(options))}if(options.emulateJSON){params.contentType="application/x-www-form-urlencoded";params.data=params.data?{model:params.data}:{}}if(options.emulateHTTP&&(type==="PUT"||type==="DELETE"||type==="PATCH")){params.type="POST";if(options.emulateJSON)params.data._method=type;var beforeSend=options.beforeSend;options.beforeSend=function(xhr){xhr.setRequestHeader("X-HTTP-Method-Override",type);if(beforeSend)return beforeSend.apply(this,arguments)}}if(params.type!=="GET"&&!options.emulateJSON){params.processData=false}var success=options.success;options.success=function(resp){if(success)success(model,resp,options);model.trigger("sync",model,resp,options)};var error=options.error;options.error=function(xhr){if(error)error(model,xhr,options);model.trigger("error",model,xhr,options)};var xhr=options.xhr=Backbone.ajax(_.extend(params,options));model.trigger("request",model,xhr,options);return xhr};Backbone.ajax=function(){return Backbone.$.ajax.apply(Backbone.$,arguments)};var extend=function(protoProps,staticProps){var parent=this;var child;if(protoProps&&_.has(protoProps,"constructor")){child=protoProps.constructor}else{child=function(){return parent.apply(this,arguments)}}_.extend(child,parent,staticProps);var Surrogate=function(){this.constructor=child};Surrogate.prototype=parent.prototype;child.prototype=new Surrogate;if(protoProps)_.extend(child.prototype,protoProps);child.__super__=parent.prototype;return child};Model.extend=Collection.extend=Router.extend=View.extend=History.extend=extend;var urlError=function(){throw new Error('A "url" property or function must be specified')}}).call(this);