jQuery.fn.extend({//$('ul').find('li').css('background','red');//$('ul').find( $('li') ).css('background','red');find: function( selector ) {vari,ret=[],self= this,len=self.length;if ( typeof selector !== "string" ) {//$('li')//jQuery( selector )是li集合，filter调用者是li，filter返回的是满足function条件的li，li.prevObject=所有li，//外层 this.pushStack返回满足条件的li,li.prevObject=所有ul，return this.pushStack( jQuery( selector ).filter(function() {for ( i = 0; i < len; i++) {if ( jQuery.contains( self[ i ], this ) ) {//this是每一个li，是包含关系返回truereturn true;}}}) );}//$('ul').find('li').css('background','red');//'li'for ( i = 0; i < len; i++) {jQuery.find( selector, self[ i ], ret );//Sizzle
}//Needed because $( selector, context ) becomes $( context ).find( selector ) , unique去重ret = this.pushStack( len > 1 ?jQuery.unique( ret ) : ret );ret.selector= this.selector ? this.selector + " " +selector : selector;returnret;},/*<div class="box">div1<span class="box">span</span></div><div>div2</div><span class="box1">span1</span><span class="box2">span2</span><span class="box3">span3</span>$('div').has('span').css('border','1px red solid');*/has:function( target ) {//target = "span"/*jQuery( target, this ):return ( context ：div集合对象 || rootjQuery ).find( selector："span" );Sizzle的find方法*/var targets = jQuery( target, this ),//this是div集合，返回从div集合对象中找到的span对象<span class="box">span</span>l = targets.length;//1return this.filter(  function() {//this是div集合var i = 0;for ( ; i < l; i++) {if ( jQuery.contains( this, targets[i] ) ) {//this是每一个divreturn true;}}}/*filter: function( f ) {  //这里没有函数体return this.pushStack( winnow(this, f || [], false) );//返回的是winnow(this, f || [], true)返回的结果并且结果.prevObject = 调用者。this是div集合
},
function winnow( elements, f, not ) {//把grep当成主体函数来看return jQuery.grep( elements, function( elem, i ) { //elements是div集合return !!f.call( elem, i, elem ) !== not;//elem是每一个div});//返回的是满足函数条件function也就是f的div集合
}*/);},not:function( selector ) {//$('div').not('.box').css('border','1px red solid');/*pushStack: function( elems ) {var ret = jQuery.merge( this.constructor(), elems );ret.prevObject = this;return ret;  //返回的是满足条件的'.div',这个'.div'的prevObject=$('div'),用于回退}*///返回的是winnow(this, selector || [], true)返回的结果并且结果.prevObject = 调用者。return this.pushStack( winnow(this, selector || [], true) );},filter:function( selector ) {return this.pushStack( winnow(this, selector || [], false) );},is:function( selector ) {return !!winnow(this,//If this is a positional/relative selector, check membership in the returned set//so $("p:first").is("p:last") won't return true for a doc with two "p".typeof selector === "string" && rneedsContext.test( selector ) ?jQuery( selector ) :selector||[],false).length;},//$('#div2').closest('.box')//$('#div2').closest('.box', $('body').get(0) )closest: function( selectors, context ) {varcur,i= 0,l= this.length,matched=[],pos= ( rneedsContext.test( selectors ) || typeof selectors !== "string" ) ?//获取jqUERY对象jQuery( selectors, context || this.context ) :0;for ( ; i < l; i++) {for ( cur = this[i]; cur && cur !== context; cur =cur.parentNode ) {//Always skip document fragmentsif ( cur.nodeType < 11 && (pos ?pos.index(cur)> -1://Don't pass non-elements to Sizzlecur.nodeType === 1 &&jQuery.find.matchesSelector(cur, selectors)) ) {cur= matched.push( cur );//找到就push进来break;//找到一个就跳出循环
}}}//入栈去重return this.pushStack( matched.length > 1 ?jQuery.unique( matched ) : matched );},//Determine the position of an element within//the matched set of elementsindex: function( elem ) {//console.log( $('#div1').index() );//1,这个元素在所有兄弟节点的排名if ( !elem ) {//this.first() = this.eq(0);return ( this[ 0 ] && this[ 0 ].parentNode ) ? this.first().prevAll().length : -1;}//$('#span1').index('span') ;//span1在所有span中的排名if ( typeof elem === "string") {return core_indexOf.call( jQuery( elem ), this[ 0] );}//$('span').index( $('#span1') ) );return core_indexOf.call( this,//If it receives a jQuery object, the first element is usedelem.jquery ? elem[ 0] : elem);},//$('div').add('span').css('border','1px red solid');//div span变红add: function( selector, context ) {var set = typeof selector === "string" ?jQuery( selector, context ) :jQuery.makeArray( selector&& selector.nodeType ?[ selector ] : selector ),//this.get()是$('div')数组，set是'span'对象，合并成一个对象，all = jQuery.merge( this.get(), set );return this.pushStack( jQuery.unique(all) );},//$('div').find('span').css('color','red').addBack('.box').css('border','1px red solid');//addBack回到栈的下一层，并且当前层和下一层进行操作。addBack: function( selector ) {//this是span，this.prevObject是div，return this.add( selector == null ?this.prevObject : this.prevObject.filter(selector));}
});functionsibling( cur, dir ) {while ( (cur = cur[dir]) && cur.nodeType !== 1) {}returncur;
}//节点的获取
jQuery.each({parent:function( elem ) {//elem是每一个调用者divvar parent =elem.parentNode;return parent && parent.nodeType !== 11 ? parent : null;},parents:function( elem ) {return jQuery.dir( elem, "parentNode");},parentsUntil:function( elem, i, until ) {return jQuery.dir( elem, "parentNode", until );},next:function( elem ) {return sibling( elem, "nextSibling");},prev:function( elem ) {return sibling( elem, "previousSibling");},nextAll:function( elem ) {return jQuery.dir( elem, "nextSibling");},prevAll:function( elem ) {return jQuery.dir( elem, "previousSibling");},nextUntil:function( elem, i, until ) {return jQuery.dir( elem, "nextSibling", until );},prevUntil:function( elem, i, until ) {return jQuery.dir( elem, "previousSibling", until );},siblings:function( elem ) {return jQuery.sibling( ( elem.parentNode ||{} ).firstChild, elem );},children:function( elem ) {returnjQuery.sibling( elem.firstChild );},contents:function( elem ) {//elem每一个divreturn elem.contentDocument ||jQuery.merge( [], elem.childNodes );}
},function( name, fn ) {//jQuery.fn[ name ]是对jQuery.prototype对象的方法扩展/*map: function( elems, callback, arg ) {if (   callback( elems[ i ], i, arg )   != null ) {ret[ ret.length ] =  callback( elems[ i ], i, arg );//末尾追加}return ret;}$('div').parentsUntil('body','div'), until, selector是'body','div'，与上面parentsUntil定义的无关，$('span').parents('body')*/jQuery.fn[ name ]= function( until, selector ) {var matched = jQuery.map( this, fn, until );//this是div集合，返回fn(this[i],i,until)结果的集合//具体操作都是在这里，真正实现是fn函数里面if ( name.slice( -5 ) !== "Until") {selector= until;//seletor='body'
}if ( selector && typeof selector === "string") {matched=jQuery.filter( selector, matched );}if ( this.length > 1) {/*guaranteedUnique = {children: true,contents: true,next: true,prev: true};*/if ( !guaranteedUnique[ name ] ) {//在json里面jQuery.unique( matched );//去重
}//Reverse order for parents* and prev-derivativesif( rparentsprev.test( name ) ) {matched.reverse();}}return this.pushStack( matched );};
});jQuery.extend({//jQuery.filter( '.box1', $('div'),true )   div中class有box1的filter: function( expr, elems, not ) {var elem = elems[ 0];if( not ) {expr= ":not(" + expr + ")"; //:not(.box1)
}return elems.length === 1 && elem.nodeType === 1 ?//Sizzle完成jQuery.find.matchesSelector( elem, expr ) ?[ elem ] : [] :jQuery.find.matches( expr, jQuery.grep( elems,function( elem ) {return elem.nodeType === 1;}));},dir:function( elem, dir, until ) {var matched =[],truncate= until !==undefined;while ( (elem = elem[ dir ]) && elem.nodeType !== 9) {if ( elem.nodeType === 1) {if ( truncate &&jQuery( elem ).is( until ) ) {break;}matched.push( elem );}}returnmatched;},sibling:function( n, elem ) {var matched =[];for ( ; n; n =n.nextSibling ) {if ( n.nodeType === 1 && n !==elem ) {matched.push( n );}}returnmatched;}
});//winnow($('div'), '.box1' || [], true)  div中class有box1的
function winnow( elements, qualifier, not ) {//返回的是满足函数条件的elements元素集合/*$('div').filter(function(i,elem){return elem.className == 'box';}).css('border','1px red solid');*/if( jQuery.isFunction( qualifier ) ) {//grep是elements每一个元素执行function()，函数传入的实参一个是每一个元素另一个元素下标，这里elem, i是形参， 并判断函数的返回值，函数体这里定义，return jQuery.grep( elements, function( elem, i ) {//!!是把undefined和null转换成falsereturn !!qualifier.call( elem, i, elem ) !==not;});//返回的是满足函数条件的elements：div元素集合
}/*var oBox = document.getElementsByClassName('box')[0];$('div').filter(oBox).css('border','1px red solid');*/if( qualifier.nodeType ) {return jQuery.grep( elements, function( elem ) {return ( elem === qualifier ) !==not;});}if ( typeof qualifier === "string") {//isSimple = /^.[^:#\[\.,]*$/  任意字符开头，不包括:#[.,一直到结束if ( isSimple.test( qualifier ) ) {//匹配成功：.box，#div1，:odd ，ul，li，divreturnjQuery.filter( qualifier, elements, not );}//匹配不成功div:odd，ul #li，ul[title='hello']，div.box，ul,liqualifier =jQuery.filter( qualifier, elements );}//匹配不成功return jQuery.grep( elements, function( elem ) {return ( core_indexOf.call( qualifier, elem ) >= 0 ) !==not;});
}var rxhtmlTag = /<(?!area|br|col|embed|hr|img|input|link|meta|param)(([\w:]+)[^>]*)\/>/gi,rtagName= /<([\w:]+)/,rhtml= /<|&#?\w+;/,rnoInnerhtml= /<(?:script|style|link)/i,manipulation_rcheckableType= /^(?:checkbox|radio)$/i,//checked="checked" or checkedrchecked = /checked\s*(?:[^=]|=\s*.checked.)/i,rscriptType= /^$|\/(?:java|ecma)script/i,rscriptTypeMasked= /^true\/(.*)/,rcleanScript= /^\s*<!(?:\[CDATA\[|--)|(?:\]\]|--)>\s*$/g,//We have to close these tags to support XHTML (#13200)wrapMap ={//Support: IE 9option: [ 1, "<select multiple='multiple'>", "</select>"],thead: [1, "<table>", "</table>"],col: [2, "<table><colgroup>", "</colgroup></table>"],tr: [2, "<table><tbody>", "</tbody></table>"],td: [3, "<table><tbody><tr>", "</tr></tbody></table>"],_default: [0, "", ""]};//Support: IE 9
wrapMap.optgroup =wrapMap.option;wrapMap.tbody= wrapMap.tfoot = wrapMap.colgroup = wrapMap.caption =wrapMap.thead;
wrapMap.th=wrapMap.td;jQuery.fn.extend({//$('div').text('<h1>标题</h1>');//不会被解析成标签text: function( value ) {return jQuery.access( this, function( value ) {return value === undefined ?jQuery.text(this ) ://获取this.empty().append( ( this[ 0 ] && this[ 0 ].ownerDocument ||document ).createTextNode( value ) );},null, value, arguments.length );},/*$('span').append( oDiv );$('span').append( $('div') );$('span').append( '<div></div>' );*/append:function() {return this.domManip( arguments, function( elem ) {if ( this.nodeType === 1 || this.nodeType === 11 || this.nodeType === 9) {var target = manipulationTarget( this, elem );target.appendChild( elem );}});},/*$('div').prepend( $('span') );//sopan添加到div里面的最前面//<div><span></span>div</div>*/prepend:function() {return this.domManip( arguments, function( elem ) {if ( this.nodeType === 1 || this.nodeType === 11 || this.nodeType === 9) {//manipulationTarget是做兼容，返回的是thisvar target = manipulationTarget( this, elem );target.insertBefore( elem, target.firstChild );//firstChild第一个子节点
}});},before:function() {return this.domManip( arguments, function( elem ) {if ( this.parentNode ) {//添加到this前面this.parentNode.insertBefore( elem, this);}});},after:function() {return this.domManip( arguments, function( elem ) {if ( this.parentNode ) {//添加到下一个兄弟节点前面。就是后面this.parentNode.insertBefore( elem, this.nextSibling );}});},//$('div').remove('.box');//删除节点remove: function( selector, keepData ) {varelem,elems= selector ? jQuery.filter( selector, this ) : this,i= 0;for ( ; (elem = elems[i]) != null; i++) {if ( !keepData && elem.nodeType === 1) {//gatAll删除子标签jQuery.cleanData( getAll( elem ) );//删除节点并且删除点击事件
}if( elem.parentNode ) {//标签中有script标签if ( keepData &&jQuery.contains( elem.ownerDocument, elem ) ) {setGlobalEval( getAll( elem,"script") );}elem.parentNode.removeChild( elem );//删除这个节点，原生方法
}}return this;},empty:function() {varelem,i= 0;for ( ; (elem = this[i]) != null; i++) {if ( elem.nodeType === 1) {//清空data数据缓存和点击事件jQuery.cleanData( getAll( elem, false) );//Remove any remaining nodeselem.textContent = "";}}return this;},//var cloneDiv3 = $('div').clone(true,true);//子元素有点击事件clone: function( dataAndEvents, deepDataAndEvents ) {dataAndEvents= dataAndEvents == null ? false: dataAndEvents;deepDataAndEvents= deepDataAndEvents == null ?dataAndEvents : deepDataAndEvents;/*（this.） map: function( callback ) {return this.pushStack( jQuery.map(this, function( elem, i ) {return callback.call( elem, i, elem );}));},*/return this.map( function () {//this的每一个元素，调用f,返回f结果集合，结果.preObject= $('div'), 调用内部clone方法return jQuery.clone( this, dataAndEvents, deepDataAndEvents );});},html:function( value ) {return jQuery.access( this, function( value ) {var elem = this[ 0 ] ||{},i= 0,l= this.length;if ( value === undefined && elem.nodeType === 1) {return elem.innerHTML;//$('span').html();原生获取方式
}//设置$('span').html('<tr></tr>');//See if we can take a shortcut and just use innerHTMLif ( typeof value === "string" && !rnoInnerhtml.test( value ) &&!wrapMap[ ( rtagName.exec( value ) || [ "", "" ] )[ 1].toLowerCase() ] ) {value= value.replace( rxhtmlTag, "<$1></$2>");try{for ( ; i < l; i++) {elem= this[ i ] ||{};//Remove element nodes and prevent memory leaksif ( elem.nodeType === 1) {jQuery.cleanData( getAll( elem,false) );elem.innerHTML=value;}}elem= 0;//If using innerHTML throws an exception, use the fallback method} catch( e ) {}}if( elem ) {this.empty().append( value );//append添加节点
}},null, value, arguments.length );},replaceWith:function() {var//Snapshot the DOM in case .domManip sweeps something relevant into its fragmentargs = jQuery.map( this, function( elem ) {return[ elem.nextSibling, elem.parentNode ];}),i= 0;//Make the changes, replacing each context element with the new contentthis.domManip( arguments, function( elem ) {var next = args[ i++],parent= args[ i++];if( parent ) {//Don't use the snapshot next if it has moved (#13810)if ( next && next.parentNode !==parent ) {next= this.nextSibling;}jQuery(this).remove();parent.insertBefore( elem, next );}//Allow new content to include elements from the context set}, true);//Force removal if there was no new content (e.g., from empty arguments)return i ? this : this.remove();},//$('div').detach();detach: function( selector ) {return this.remove( selector, true);},domManip:function( args, callback, allowIntersection ) {//Flatten any nested arraysargs =core_concat.apply( [], args );varfragment, first, scripts, hasScripts, node, doc,i= 0,l= this.length,set= this,iNoClone= l - 1,value= args[ 0],isFunction=jQuery.isFunction( value );/*$('span').append(function(){return 'hello';});*///We can't cloneNode fragments that contain checked, in WebKitif ( isFunction || !( l <= 1 || typeof value !== "string" || jQuery.support.checkClone || !rchecked.test( value ) ) ) {return this.each(function( index ) {var self =set.eq( index );if( isFunction ) {args[0 ] = value.call( this, index, self.html() );}//重新调用$('span').append('hello')
self.domManip( args, callback, allowIntersection );});}if( l ) {//$('span').append('<h1>hello</h1>'); 文档碎片fragment = jQuery.buildFragment( args, this[ 0 ].ownerDocument, false, !allowIntersection && this);first=fragment.firstChild;if ( fragment.childNodes.length === 1) {fragment=first;}if( first ) {scripts= jQuery.map( getAll( fragment, "script"), disableScript );hasScripts=scripts.length;//Use the original fragment for the last item instead of the first because it can end up//being emptied incorrectly in certain situations (#8070).for ( ; i < l; i++) {node=fragment;if ( i !==iNoClone ) {node= jQuery.clone( node, true, true);//Keep references to cloned scripts for later restorationif( hasScripts ) {//Support: QtWebKit//jQuery.merge because core_push.apply(_, arraylike) throwsjQuery.merge( scripts, getAll( node, "script") );}}callback.call(this[ i ], node, i );}if( hasScripts ) {doc= scripts[ scripts.length - 1].ownerDocument;//Reenable scripts
jQuery.map( scripts, restoreScript );//Evaluate executable scripts on first document insertionfor ( i = 0; i < hasScripts; i++) {node=scripts[ i ];if ( rscriptType.test( node.type || "" ) &&!data_priv.access( node, "globalEval" ) &&jQuery.contains( doc, node ) ) {if( node.src ) {//Hope ajax is available...
jQuery._evalUrl( node.src );}else{jQuery.globalEval( node.textContent.replace( rcleanScript,"") );}}}}}}return this;}
});jQuery.each({appendTo:"append",prependTo:"prepend",insertBefore:"before",insertAfter:"after",replaceAll:"replaceWith"},function( name, original ) {//$('span').appendTo( $('div') ).css('border','1px red solid');jQuery.fn[ name ] = function( selector ) {varelems,ret=[],insert= jQuery( selector ),//$('div')last = insert.length - 1,i= 0;for ( ; i <= last; i++) {elems= i === last ? this : this.clone( true);//调用jQuery($('div')[i]).append($('span'))
jQuery( insert[ i ] )[ original ]( elems );//Support: QtWebKit//.get() because core_push.apply(_, arraylike) throws
core_push.apply( ret, elems.get() );}return this.pushStack( ret );};
});jQuery.extend({//jQuery.clone( $('div')每一个, true, true );clone: function( elem, dataAndEvents, deepDataAndEvents ) {vari, l, srcElements, destElements,clone= elem.cloneNode( true ),//原生的方式，克隆，仅仅复制html节点包括子节点，事件缓存没有复制过来//当前页inPage =jQuery.contains( elem.ownerDocument, elem );/*console.log(clone);//节点包括子节点。false就只有外层节点，没有子节点
var dd = getAll( elem );//[div, span, p]
var rr = getAll( clone );//[div, span, p]*/
/*Support: IE >= 9   if是兼容性$('input').prop('checked',true);$('input').clone().appendTo( 'body' );//jQuery克隆过去也是选中的，但是原生的是没有选中的，*/if ( !jQuery.support.noCloneChecked && ( elem.nodeType === 1 || elem.nodeType === 11 ) && !jQuery.isXMLDoc( elem ) ) {//We eschew Sizzle here for performance reasons: http://jsperf.com/getall-vs-sizzle/2destElements = getAll( clone );//数组srcElements =getAll( elem );for ( i = 0, l = srcElements.length; i < l; i++) {fixInput( srcElements[ i ], destElements[ i ] );}}//Copy the events from the original to the cloneif ( dataAndEvents ) {//克隆自身的事件if ( deepDataAndEvents ) {//克隆子项的事件srcElements = srcElements ||getAll( elem );destElements= destElements ||getAll( clone );for ( i = 0, l = srcElements.length; i < l; i++) {cloneCopyEvent( srcElements[ i ], destElements[ i ] );}}else {//不克隆子项只克隆自身，原节点、复制的节点
cloneCopyEvent( elem, clone );}}//克隆的元素包含script标签destElements = getAll( clone, "script");if ( destElements.length > 0) {//把script标签设置为全局script执行setGlobalEval( destElements, !inPage && getAll( elem, "script") );}//Return the cloned setreturnclone;},//创建文档碎片buildFragment: function( elems, context, scripts, selection ) {varelem, tmp, tag, wrap, contains, j,i= 0,l=elems.length,fragment=context.createDocumentFragment(),nodes= [];//实现的结果for ( ; i < l; i++) {elem= elems[ i ];//每一个元素做处理if ( elem || elem === 0) {//Add nodes directlyif ( jQuery.type( elem ) === "object") {//Support: QtWebKit//jQuery.merge because core_push.apply(_, arraylike) throwsjQuery.merge( nodes, elem.nodeType ?[ elem ] : elem );//Convert non-html into a text node} else if ( !rhtml.test( elem ) ) {nodes.push( context.createTextNode( elem ) );//$('span').append( '<h1>hello</h1><h1>hello</h1><h1>hello</h1>' ); 添加多标签用到文档碎片，效率高，} else{tmp= tmp || fragment.appendChild( context.createElement("div") );//Deserialize a standard representationtag = ( rtagName.exec( elem ) || ["", ""] )[ 1].toLowerCase();wrap= wrapMap[ tag ] ||wrapMap._default;tmp.innerHTML= wrap[ 1 ] + elem.replace( rxhtmlTag, "<$1></$2>" ) + wrap[ 2];/*wrapMap = {// Support: IE 9option: [ 1, "<select multiple='multiple'>", "</select>" ],thead: [ 1, "<table>", "</table>" ],col: [ 2, "<table><colgroup>", "</colgroup></table>" ],tr: [ 2, "<table><tbody>", "</tbody></table>" ],td: [ 3, "<table><tbody><tr>", "</tr></tbody></table>" ],_default: [ 0, "", "" ]};*/j= wrap[ 0];while ( j--) {tmp=tmp.lastChild;}//Support: QtWebKit//jQuery.merge because core_push.apply(_, arraylike) throws
jQuery.merge( nodes, tmp.childNodes );//Remember the top-level containertmp =fragment.firstChild;//Fixes #12346//Support: Webkit, IEtmp.textContent = "";}}}//Remove wrapper from fragmentfragment.textContent = "";i= 0;while ( (elem = nodes[ i++]) ) {//#4087 - If origin and destination elements are the same, and this is//that element, do not do anythingif ( selection && jQuery.inArray( elem, selection ) !== -1) {continue;}contains=jQuery.contains( elem.ownerDocument, elem );//Append to fragmenttmp = getAll( fragment.appendChild( elem ), "script");//Preserve script evaluation historyif( contains ) {setGlobalEval( tmp );}//Capture executablesif( scripts ) {  j= 0;while ( (elem = tmp[ j++]) ) {if ( rscriptType.test( elem.type || "") ) {scripts.push( elem );}}}}returnfragment;},//清除元素的点击事件和数据（data保存的）cleanData: function( elems ) {vardata, elem, events, type, key, j,special=jQuery.event.special,i= 0;for ( ; (elem = elems[ i ]) !== undefined; i++) {if( Data.accepts( elem ) ) {key=elem[ data_priv.expando ];//删除元素的点击事件，data里的事件if ( key && (data =data_priv.cache[ key ]) ) {events= Object.keys( data.events ||{} );if( events.length ) {for ( j = 0; (type = events[j]) !== undefined; j++) {if ( special[ type ] ) {//特殊事件，自定义事件
jQuery.event.remove( elem, type );//This is a shortcut to avoid jQuery.event.remove's overhead} else{jQuery.removeEvent( elem, type, data.handle );}}}if ( data_priv.cache[ key ] ) {//删除缓存data里的//Discard any remaining `private` datadeletedata_priv.cache[ key ];}}}//Discard any remaining `user` datadeletedata_user.cache[ elem[ data_user.expando ] ];}},_evalUrl:function( url ) {returnjQuery.ajax({url: url,type:"GET",dataType:"script",async:false,global:false,"throws": true});}
});//Support: 1.x compatibility//Manipulating tables requires a tbody
functionmanipulationTarget( elem, content ) {return jQuery.nodeName( elem, "table" ) &&jQuery.nodeName( content.nodeType=== 1 ? content : content.firstChild, "tr" ) ?
//没有tbody自动添加tbodyelem.getElementsByTagName("tbody")[0] ||elem.appendChild( elem.ownerDocument.createElement("tbody") ) :elem;
}//Replace/restore the type attribute of script elements for safe DOM manipulation
functiondisableScript( elem ) {elem.type= (elem.getAttribute("type") !== null) + "/" +elem.type;returnelem;
}functionrestoreScript( elem ) {var match =rscriptTypeMasked.exec( elem.type );if( match ) {elem.type= match[ 1];}else{elem.removeAttribute("type");}returnelem;
}//Mark scripts as having already been evaluated
functionsetGlobalEval( elems, refElements ) {var l =elems.length,i= 0;for ( ; i < l; i++) {data_priv.set(elems[ i ],"globalEval", !refElements || data_priv.get( refElements[ i ], "globalEval"));}
}//cloneCopyEvent( elem, clone );  克隆事件，原节点目的节点，节点已经由原生方法克隆了，
functioncloneCopyEvent( src, dest ) {vari, l, type, pdataOld, pdataCur, udataOld, udataCur, events;if ( dest.nodeType !== 1) {return;}//1. 从data中克隆事件if( data_priv.hasData( src ) ) {pdataOld=data_priv.access( src );pdataCur=data_priv.set( dest, pdataOld );events=pdataOld.events;if( events ) {deletepdataCur.handle;pdataCur.events={};//遍历for ( type inevents ) {for ( i = 0, l = events[ type ].length; i < l; i++) {jQuery.event.add( dest, type, events[ type ][ i ] );}}}}//2. 从data中克隆数据if( data_user.hasData( src ) ) {udataOld=data_user.access( src );udataCur=jQuery.extend( {}, udataOld );//遍历
data_user.set( dest, udataCur );}
}functiongetAll( context, tag ) {var ret = context.getElementsByTagName ? context.getElementsByTagName( tag || "*") :context.querySelectorAll? context.querySelectorAll( tag || "*") :[];return tag === undefined || tag && jQuery.nodeName( context, tag ) ?jQuery.merge( [ context ], ret ) :ret;
}//Support: IE >= 9
functionfixInput( src, dest ) {var nodeName =dest.nodeName.toLowerCase();//Fails to persist the checked state of a cloned checkbox or radio button.if ( nodeName === "input" &&manipulation_rcheckableType.test( src.type ) ) {dest.checked=src.checked;//Fails to return the selected option to the default selected state when cloning options} else if ( nodeName === "input" || nodeName === "textarea") {dest.defaultValue=src.defaultValue;}
}
jQuery.fn.extend({/*$('span').wrap('<div>');//每个span包一个div    $('span').wrapAll('<div>');//所有span只包一个div，如果span里面有其他标签会把这个标签移出来$('span').wrapInner('<div>');//每个span里面包一个div$('span').unwrap();//删除父级*/wrapAll:function( html ) {varwrap;if( jQuery.isFunction( html ) ) {/*$('span').wrapAll(function(){return '<div>';});*/return this.each(function( i ) {//函数执行一次，然后用函数返回值再调用jQuery( this ).wrapAll( html.call(this, i) );});}if ( this[ 0] ) {//$('span').wrapAll('<div>'); 创建div对象并且克隆节点，事件也克隆wrap = jQuery( html, this[ 0 ].ownerDocument ).eq( 0 ).clone( true);if ( this[ 0].parentNode ) {wrap.insertBefore(this[ 0 ] );//添加到第一个span的前面
}wrap.map(function() {var elem = this;while( elem.firstElementChild ) {elem=elem.firstElementChild;}returnelem;}).append(this);}return this;},wrapInner:function( html ) {if( jQuery.isFunction( html ) ) {return this.each(function( i ) {jQuery(this ).wrapInner( html.call(this, i) );});}return this.each(function() {var self = jQuery( this),contents=self.contents();if( contents.length ) {contents.wrapAll( html );}else{self.append( html );}});},//分别包装wrap: function( html ) {var isFunction =jQuery.isFunction( html );return this.each(function( i ) {jQuery(this ).wrapAll( isFunction ? html.call(this, i) : html );});},//找到父级，替换操作，删除父级，不能是bodyunwrap: function() {return this.parent().each(function() {if ( !jQuery.nodeName( this, "body") ) {jQuery(this ).replaceWith( this.childNodes );}}).end();}
});