jQuery08源码 (5140 , 6057) DOM操作 : 添加 删除 获取 包装 DOM筛选

jQuery.fn.extend({
//$('ul').find('li').css('background','red');
//$('ul').find( $('li') ).css('background','red');
find: function( selector ) {
var i,
ret = [],
self = this,
len = self.length;
if ( typeof selector !== "string" ) {//$('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true
return 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;
return ret;
},
/*
<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;//1

return 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div
return 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 ) {
var cur,
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 fragments
if ( cur.nodeType < 11 && (pos ?
pos.index(cur) > -1 :

// Don't pass non-elements to Sizzle
cur.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 elements
index: 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 used
elem.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)
);
}
});

function sibling( cur, dir ) {
while ( (cur = cur[dir]) && cur.nodeType !== 1 ) {}

return cur;
}

//节点的获取
jQuery.each({
parent: function( elem ) {//elem是每一个调用者div
var 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 ) {
return jQuery.sibling( elem.firstChild );
},
contents: function( elem ) {//elem每一个div
return 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-derivatives
if ( 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 );
}
}
return matched;
},

sibling: function( n, elem ) {
var matched = [];

for ( ; n; n = n.nextSibling ) {
if ( n.nodeType === 1 && n !== elem ) {
matched.push( n );
}
}

return matched;
}
});

//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false
return !!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，div
return jQuery.filter( qualifier, elements, not );
}
//匹配不成功div:odd，ul #li，ul[title='hello']，div.box，ul,li
qualifier = 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)$/i,
// checked="checked" or checked
rchecked = /checked\s*(?:[^=]|=\s*.checked.)/i,
rscriptType = /^$|\/(?:java|ecma)script/i,
rscriptTypeMasked = /^true\/(.*)/,
rcleanScript = /^\s*<!(?:\[CDATA\[|--)|(?:\]\]|--)>\s*$/g,

// We have to close these tags to support XHTML (#13200)
wrapMap = {

// Support: IE 9
option: [ 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this
var 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 ) {
var elem,
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() {
var elem,
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 nodes
elem.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 innerHTML
if ( 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 leaks
if ( 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 fragment
args = jQuery.map( this, function( elem ) {
return [ elem.nextSibling, elem.parentNode ];
}),
i = 0;

// Make the changes, replacing each context element with the new content
this.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 arrays
args = core_concat.apply( [], args );

var fragment, first, scripts, hasScripts, node, doc,
i = 0,
l = this.length,
set = this,
iNoClone = l - 1,
value = args[ 0 ],
isFunction = jQuery.isFunction( value );
/*
$('span').append(function(){
return 'hello';
});
*/
// We can't cloneNode fragments that contain checked, in WebKit
if ( isFunction || !( l <= 1 || typeof value !== "string" || jQuery.support.checkClone || !rchecked.test( value ) ) ) {
return this.each(function( index ) {
var self = set.eq( index );
if ( isFunction ) {
args[ 0 ] = value.call( this, index, self.html() );
}
//重新调用$('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 restoration
if ( hasScripts ) {
// Support: QtWebKit
// jQuery.merge because core_push.apply(_, arraylike) throws
jQuery.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 insertion
for ( 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( $('div') ).css('border','1px red solid');
jQuery.fn[ name ] = function( selector ) {
var elems,
ret = [],
insert = jQuery( selector ),//$('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 ) {
var i, 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/2 destElements = 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 clone
if ( 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 set
return clone;
},

//创建文档碎片
buildFragment: function( elems, context, scripts, selection ) {
var elem, 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 directly
if ( jQuery.type( elem ) === "object" ) {
// Support: QtWebKit
// jQuery.merge because core_push.apply(_, arraylike) throws
jQuery.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 representation
tag = ( rtagName.exec( elem ) || ["", ""] )[ 1 ].toLowerCase();
wrap = wrapMap[ tag ] || wrapMap._default;
tmp.innerHTML = wrap[ 1 ] + elem.replace( rxhtmlTag, "<$1></$2>" ) + wrap[ 2 ];
/*
wrapMap = {

// Support: IE 9
option: [ 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 container
tmp = fragment.firstChild;

// Fixes #12346
// Support: Webkit, IE
tmp.textContent = "";
}
}
}

// Remove wrapper from fragment
fragment.textContent = "";

i = 0;
while ( (elem = nodes[ i++ ]) ) {

// #4087 - If origin and destination elements are the same, and this is
// that element, do not do anything
if ( selection && jQuery.inArray( elem, selection ) !== -1 ) {
continue;
}

contains = jQuery.contains( elem.ownerDocument, elem );

// Append to fragment
tmp = getAll( fragment.appendChild( elem ), "script" );

// Preserve script evaluation history
if ( contains ) {
setGlobalEval( tmp );
}

// Capture executables
if ( scripts ) {
j = 0;
while ( (elem = tmp[ j++ ]) ) {
if ( rscriptType.test( elem.type || "" ) ) {
scripts.push( elem );
}
}
}
}

return fragment;
},

//清除元素的点击事件和数据（data保存的）
cleanData: function( elems ) {
var data, 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` data
delete data_priv.cache[ key ];
}
}
}
// Discard any remaining `user` data
delete data_user.cache[ elem[ data_user.expando ] ];
}
},

_evalUrl: function( url ) {
return jQuery.ajax({
url: url,
type: "GET",
dataType: "script",
async: false,
global: false,
"throws": true
});
}
});

// Support: 1.x compatibility
// Manipulating tables requires a tbody
function manipulationTarget( elem, content ) {
return jQuery.nodeName( elem, "table" ) &&
jQuery.nodeName( content.nodeType === 1 ? content : content.firstChild, "tr" ) ?
//没有tbody自动添加tbody
elem.getElementsByTagName("tbody")[0] ||
elem.appendChild( elem.ownerDocument.createElement("tbody") ) :
elem;
}

// Replace/restore the type attribute of script elements for safe DOM manipulation
function disableScript( elem ) {
elem.type = (elem.getAttribute("type") !== null) + "/" + elem.type;
return elem;
}
function restoreScript( elem ) {
var match = rscriptTypeMasked.exec( elem.type );

if ( match ) {
elem.type = match[ 1 ];
} else {
elem.removeAttribute("type");
}

return elem;
}

// Mark scripts as having already been evaluated
function setGlobalEval( 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，
function cloneCopyEvent( src, dest ) {
var i, 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 ) {
delete pdataCur.handle;
pdataCur.events = {};
//遍历
for ( type in events ) {
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 );
}
}

function getAll( 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
function fixInput( 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 ) {
var wrap;

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;
}

return elem;
}).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body
unwrap: function() {
return this.parent().each(function() {
if ( !jQuery.nodeName( this, "body" ) ) {
jQuery( this ).replaceWith( this.childNodes );
}
}).end();
}
});