/*!
* jQuery JavaScript Library v1.12.4
* http://jquery.com/
*
* Includes Sizzle.js
* http://sizzlejs.com/
*
* Copyright jQuery Foundation and other contributors
* Released under the MIT license
* http://jquery.org/license
*
* Date: 2016-05-20T17:17Z
*/
// 定义一个立即执行函数,用于根据不同的环境(如CommonJS环境或浏览器环境等)来正确地导出jQuery模块。
// 它接收全局对象(通常是window或在Node.js中类似的全局对象)以及一个工厂函数作为参数。
(function( global, factory ) {
// 判断是否处于CommonJS环境中(例如在Node.js环境下),通过检查module是否是对象且module.exports是否是对象来确定。
if ( typeof module === "object" && typeof module.exports === "object" ) {
// 如果全局对象(这里指的是类似浏览器中的window对象)有document属性,意味着当前环境类似浏览器环境,直接调用factory函数并传入全局对象和true,然后将结果作为模块的导出内容。
// 否则,返回一个函数,这个函数在被调用时会检查传入的参数(假设是类似window的对象)是否包含document属性,如果没有则抛出错误,有的话就调用factory函数创建jQuery并返回。
module.exports = global.document?
factory( global, true ) :
function( w ) {
// 如果传入的对象(假设类似window)没有document属性,则抛出一个错误,提示jQuery需要一个包含document的window对象,因为很多操作依赖于document。
if (!w.document ) {
throw new Error( "jQuery需要一个包含document的window对象" );
}
// 如果传入的对象有document属性,调用factory函数创建jQuery并返回。
return factory( w );
};
} else {
// 如果不是CommonJS环境(比如在浏览器环境中直接通过script标签引入脚本的情况),直接调用factory函数,传入全局对象(通常就是window对象)来创建jQuery并使用。
factory( global );
}
// 根据window对象是否存在,决定传入window对象或者当前的全局对象(在Node.js中可能是global)作为第一个参数,第二个参数传入一个函数(后续会在函数内部定义jQuery相关逻辑)。
}(typeof window!== "undefined"? window : this, function( window, noGlobal ) {
// 定义一个数组,用于存储已经被删除的元素的ID(可能在后续操作中用于管理DOM元素的删除记录等相关逻辑)。
var deletedIds = [];
// 获取全局的document对象,后续很多DOM操作都会依赖这个对象,比如查找元素、创建元素等操作。
var document = window.document;
// 从deletedIds数组借用一些数组的原生方法,方便后续在代码中直接使用这些方法,而不用每次都通过deletedIds去调用,提升代码的简洁性和性能(在JavaScript中,函数也是对象,可以这样赋值使用)。
var slice = deletedIds.slice;
var concat = deletedIds.concat;
var push = deletedIds.push;
var indexOf = deletedIds.indexOf;
// 创建一个空对象,用于建立类名(可能是DOM元素的类名或者自定义的一些类名标识)与类型之间的映射关系,方便后续根据类名来判断对应的类型等操作。
var class2type = {};
// 获取class2type对象的toString方法,这个方法可以用于判断对象的类型等操作(JavaScript中Object.prototype.toString可以准确获取对象的类型信息)。
var toString = class2type.toString;
// 获取class2type对象的hasOwnProperty方法,用于判断对象自身是否具有某个属性,而不是继承自原型链上的属性,在属性判断和遍历等操作中很有用。
var hasOwn = class2type.hasOwnProperty;
// 创建一个空对象,用于存储浏览器支持的各种特性的检测结果,比如是否支持某个CSS属性、某个HTML5特性等,方便在代码中根据这些检测结果来做不同的逻辑处理,以实现跨浏览器兼容性。
var support = {};
// 定义jQuery的版本号,这里版本号是固定的字符串表示,方便后续在代码中根据版本做一些兼容性判断或者打印版本信息等操作。
var version = "1.12.4";
// 定义jQuery函数,它实际上是通过对init构造函数进行增强得到的,在调用时(如果没有使用new关键字)会返回一个新的jQuery.fn.init实例,这是一种常见的JavaScript设计模式,用于创建具有复杂功能和属性的对象实例。
var jQuery = function( selector, context ) {
// 如果直接调用jQuery函数(没有使用new关键字),这里会返回一个新的jQuery.fn.init实例,模拟了构造函数的行为,使得可以链式调用jQuery的各种方法。
return new jQuery.fn.init( selector, context );
};
// 定义一个正则表达式,用于匹配并去除字符串开头和结尾的空白字符,这里不仅包括常见的空格、制表符等空白字符(\s表示),还包括BOM(字节顺序标记,\uFEFF)以及不间断空格(\xA0),在处理用户输入或者从DOM获取的文本内容等场景中,去除这些空白字符可以让数据更规范。
var rtrim = /^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g;
// 定义一个正则表达式,用于匹配以"-ms-"开头的字符串,可能在处理CSS属性或者浏览器特定前缀的样式等场景中使用,用于识别和处理微软浏览器(IE等)相关的特定前缀样式。
var rmsPrefix = /^-ms-/;
// 定义一个正则表达式,用于匹配并替换字符串中“-”后跟一个字母或数字的字符,可能在将CSS样式名(通常是用“-”分隔的形式,如“background-color”)转换为JavaScript中可用的驼峰命名法(如“backgroundColor”)等场景中使用。
var rdashAlpha = /-([\da-z])/gi;
// 定义一个回调函数,用于在使用正则表达式替换(如通过replace方法结合正则使用)时,将匹配到的“-”后跟字母的字符串转换为驼峰命名法,即将匹配到的字母转换为大写形式,返回转换后的结果,用于样式名等的格式转换。
var fcamelCase = function( all, letter ) {
return letter.toUpperCase();
};
// jQuery的原型对象,所有通过jQuery构造函数创建的实例都会继承这个原型对象上的方法,这里定义了很多常见的jQuery实例方法,比如操作DOM元素、绑定事件、进行动画效果等相关的方法(后续代码中应该还有更多方法的定义,这里只是开始部分)。
jQuery.fn = jQuery.prototype = {
// 在每个jQuery实例上存储当前的jQuery版本号,方便在代码中根据版本做一些特定的操作或者调试时查看版本信息。
jquery: version,
// 明确构造函数指向jQuery本身,确保在实例的原型链上能正确找到构造函数,在一些涉及到对象创建和继承的场景中很重要,比如判断实例的类型等操作。
constructor: jQuery,
// 存储最初传入的选择器字符串,在后续操作中可能用于重新查询元素、获取选择器相关信息等,比如获取最初选择的DOM元素的选择器表达式。
selector: "",
// 初始化时,jQuery对象的默认长度设置为0,表示当前没有选中任何元素,后续在根据选择器查询到元素后,这个长度会根据实际匹配到的元素数量进行更新。
length: 0,
// 将jQuery对象转换为一个真正的数组
toArray: function() {
return slice.call( this );
},
// 获取jQuery对象中的第N个元素,或者获取所有元素组成的数组
// 定义一个名为`get`的函数,它是`jQuery.fn`(也就是`jQuery`实例的原型对象)上的方法,用于获取`jQuery`对象中的元素。
// 参数`num`表示要获取元素的索引位置。
get: function( num ) {
// 如果传入的`num`不为`null`,说明指定了要获取元素的具体位置。
return num!= null?
// 判断`num`是否小于0,如果小于0,则表示从后往前计数获取元素。
// 通过`num + this.length`计算出对应的正向索引(因为在JavaScript数组中可以通过负数索引结合长度来从后往前取值),然后从`this`(指代当前`jQuery`对象,它类似一个类数组对象,内部存储着选中的DOM元素等相关信息)中获取对应位置的元素。
// 如果`num`大于等于0,则直接从`this`中按正常索引获取对应位置的元素。
( num < 0? this[ num + this.length ] : this[ num ] ) :
// 如果`num`为`null`,表示要获取所有元素,通过`slice.call(this)`将类数组形式的`this`(当前`jQuery`对象)转换为真正的数组并返回,这样就能获取到所有被选中的元素组成的数组。
slice.call( this );
},
// `pushStack`方法用于将一个元素数组推入到当前`jQuery`对象的栈中,并返回一个新的`jQuery`对象。
// 参数`elems`是要推入栈的元素数组(可以是DOM元素数组或者其他符合要求的数据集合)。
pushStack: function( elems ) {
// 通过`jQuery.merge`方法将当前`jQuery`对象的构造函数(也就是`jQuery`函数本身)创建一个新的`jQuery`对象,并将传入的`elems`元素合并到这个新对象中。
// 这样新的`jQuery`对象就包含了原有的元素以及新传入的元素,实现了元素栈的推入操作。
var ret = jQuery.merge( this.constructor(), elems );
// 将当前`jQuery`对象(也就是调用`pushStack`方法的这个对象)赋值给新对象的`prevObject`属性,方便后续操作可以回溯到之前的`jQuery`对象,比如在链式操作中实现`end`方法的功能(回到上一个操作对象)。
ret.prevObject = this;
// 将当前`jQuery`对象的`context`属性(通常用于表示操作的上下文,比如选择元素时的父元素等相关信息)赋值给新对象,保持上下文的一致性,使得新对象在后续操作中能基于相同的上下文进行处理。
ret.context = this.context;
// 返回新创建并经过处理的`jQuery`对象,以便继续进行链式调用等操作。
return ret;
},
// `each`方法用于对`jQuery`对象中的每个元素执行一次提供的回调函数。
// 参数`callback`是一个函数,它会在每个元素上被调用,并且会传入元素的索引和元素本身作为参数。
each: function( callback ) {
// 调用`jQuery.each`函数(这里应该是`jQuery`对象上的一个全局的遍历方法,用于处理各种可迭代对象的遍历操作),将当前`jQuery`对象(`this`指代)和传入的回调函数`callback`作为参数传递进去,实现对每个元素执行回调函数的功能,并返回遍历操作的结果(具体结果格式由`jQuery.each`的实现决定,通常是返回调用者自身方便链式调用等)。
return jQuery.each( this, callback );
},
// `map`方法用于将`jQuery`对象中的每个元素通过提供的回调函数映射到一个新数组中,并返回一个新的`jQuery`对象。
// 参数`callback`是一个函数,用于对每个元素进行转换操作,生成新的值放入新数组中。
map: function( callback ) {
// 首先调用`jQuery.map`函数(类似`jQuery.each`,是用于处理映射操作的方法,会对每个元素应用回调函数并收集结果到新数组中),将当前`jQuery`对象(`this`指代)和一个匿名函数作为参数传递进去。
// 匿名函数内部会调用传入的`callback`函数,并通过`call`方法改变`callback`函数内部的`this`指向为当前元素,同时传入元素的索引`i`和元素本身`elem`作为参数,这样`callback`函数就能根据每个元素进行相应的映射操作,返回新的值。
// 然后将`jQuery.map`操作返回的新数组作为参数传入`pushStack`方法,创建一个新的`jQuery`对象并将其返回,这个新的`jQuery`对象包含了经过映射后得到的新元素集合,实现了对元素的映射功能并返回新的可操作对象,方便后续链式调用等操作。
return this.pushStack( jQuery.map( this, function( elem, i ) {
return callback.call( elem, i, elem );
}) );
},
// `slice`方法用于返回一个从当前位置开始,包含指定数量元素的新`jQuery`对象(如果参数是负数,则从末尾开始计数)。
// 它利用了JavaScript数组的`slice`方法的类似功能来处理`jQuery`对象(`jQuery`对象内部结构类似数组,可以存储多个元素信息)。
slice: function() {
// 通过`slice.apply(this, arguments)`调用数组的`slice`方法,将`this`(当前`jQuery`对象,模拟数组的行为)和传入的参数(和原生`slice`方法的参数意义一样,用于指定起始位置和截取长度等)传递进去,实现对`jQuery`对象元素的截取操作,得到一个新的元素数组。
// 然后将这个新的元素数组作为参数传入`pushStack`方法,创建并返回一个新的`jQuery`对象,这个新对象包含了截取后的元素集合,达到了获取部分元素组成新`jQuery`对象的目的,方便后续操作。
return this.pushStack( slice.apply( this, arguments ) );
},
// `first`方法用于获取`jQuery`对象中的第一个元素,它通过调用`eq`方法并传入索引`0`来实现。
first: function() {
return this.eq( 0 );
},
// `last`方法用于获取`jQuery`对象中的最后一个元素,它通过调用`eq`方法并传入索引`-1`来实现,利用了`eq`方法可以从后往前计数获取元素的功能。
last: function() {
return this.eq( -1 );
},
// `eq`方法用于获取`jQuery`对象中指定位置的元素(如果索引是负数,则从末尾开始计数)。
// 参数`i`表示要获取元素的索引位置。
eq: function( i ) {
var len = this.length,
j = +i + ( i < 0? len : 0 );
// 先根据传入的索引`i`计算出实际对应的正向索引(如果`i`是负数,则结合`this.length`转换为正向索引,方便后续在类似数组的`jQuery`对象中获取元素),得到`j`。
// 然后判断`j`是否在有效范围内(大于等于0且小于`len`,也就是当前`jQuery`对象的长度范围内),如果是,则将对应位置的元素包装成数组(因为`pushStack`方法接收的是元素数组参数),再通过`pushStack`方法创建并返回一个新的`jQuery`对象,这个新对象只包含指定位置的那个元素。
// 如果`j`不在有效范围内,则返回一个空数组通过`pushStack`方法创建并返回一个空的`jQuery`对象,表示没有获取到对应元素。
return this.pushStack( j >= 0 && j < len? [ this[ j ] ] : [] );
},
// `end`方法用于结束当前操作,返回到上一个`jQuery`对象(如果有的话),通过返回`prevObject`属性(在`pushStack`方法中设置的上一个对象的引用)来实现,如果没有上一个对象,则返回当前`jQuery`对象的构造函数创建的一个新对象(也就是相当于回到初始状态)。
end: function() {
return this.prevObject || this.constructor();
},
// 以下这几个方法是从之前定义的`deletedIds`数组对象中借用来的,直接将对应的数组方法赋值给`jQuery`对象的对应属性,用于内部操作中实现类似数组的功能,比如添加元素、排序元素、删除和插入元素等操作,方便在`jQuery`对象内部按照数组的方式进行数据处理(虽然`jQuery`对象本身不是真正的数组,但模拟了很多数组的行为和操作)。
push: push,
sort: deletedIds.sort,
splice: deletedIds.splice
};
// `jQuery.extend`方法用于扩展`jQuery`对象本身或其原型对象(通过`jQuery.fn.extend`也可以扩展原型对象,下面代码会体现),可以用于添加新的属性、方法或者合并对象等操作,实现功能的扩展和代码的复用等目的。
jQuery.extend = jQuery.fn.extend = function() {
var src, copyIsArray, copy, name, options, clone,
target = arguments[ 0 ] || {},
i = 1,
length = arguments.length,
deep = false;
// 处理深度复制的情况,如果传入的第一个参数是布尔值,说明可能是要指定是否进行深度拷贝操作。
if ( typeof target === "boolean" ) {
deep = target;
// 将目标对象设置为第二个参数(跳过布尔值和原本的第一个目标对象),并将索引`i`向后移动一位,准备开始遍历要扩展的对象。
target = arguments[ i ] || {};
i++;
}
// 如果目标对象不是对象类型(比如是基本数据类型)或者不是函数类型,那么将其转换为一个空对象,确保后续扩展操作能正常进行,因为扩展操作通常是针对对象进行的。
if ( typeof target!== "object" &&!jQuery.isFunction( target ) ) {
target = {};
}
// 如果传入的参数只有一个(除了前面可能处理的布尔值参数情况外),说明是要扩展`jQuery`对象本身,将目标对象设置为`this`(也就是`jQuery`对象或者其原型对象,根据调用的是`jQuery.extend`还是`jQuery.fn.extend`而定),并将索引`i`减1,使得后续遍历从正确的位置开始(也就是从唯一的那个要扩展的对象开始)。
if ( i === length ) {
target = this;
i--;
}
// 开始遍历每一个要扩展的对象(从索引`i`开始,遍历到参数列表末尾),将每个对象的属性和方法合并到目标对象`target`中。
for ( ; i < length; i++ ) {
// 只处理非`null`和非`undefined`的参数对象,忽略那些无效的参数。
if ( ( options = arguments[ i ] )!= null ) {
// 遍历当前要扩展的对象(`options`对象)的每一个属性名(`name`),准备将属性值复制到目标对象`target`中。
for ( name in options ) {
src = target[ name ];
copy = options[ name ];
// 如果目标对象和要复制的属性值指向同一个对象(可能出现循环引用等情况),则跳过本次复制操作,防止出现无限循环或者错误的覆盖等问题。
if ( target === copy ) {
continue;
}
// 深度复制的逻辑(这里省略了具体代码,应该是进一步判断如果是对象或数组等复杂数据类型,进行递归复制等操作,确保深层嵌套的数据也能正确复制和合并)。
// Recurse if we're merging plain objects or arrays
// 定义一个函数,用于扩展对象或合并对象,`deep`参数指示是否进行深度拷贝,`copy`是要合并到第一个对象中的对象或数组,`target`是被扩展的对象
var someFunction = function( deep, copy, target ) {
// 检查是否进行深度拷贝,且copy是一个纯对象或数组
if ( deep && copy && ( jQuery.isPlainObject( copy ) ||
( copyIsArray = jQuery.isArray( copy ) ) ) ) {
// 如果copy是数组
if ( copyIsArray ) {
copyIsArray = false; // 重置标志位,因为已经处理过是数组的情况
clone = src && jQuery.isArray( src ) ? src : []; // 根据src是否为数组来决定clone是src的引用还是新数组
} else {
// 如果copy是纯对象
clone = src && jQuery.isPlainObject( src ) ? src : {}; // 根据src是否为纯对象来决定clone是src的引用还是新对象
}
// 从不直接移动原始对象,而是克隆它们
// 使用jQuery.extend进行合并,可能涉及深度拷贝
target[ name ] = jQuery.extend( deep, clone, copy );
// 如果copy不是undefined,则直接赋值给target[name]
} else if ( copy !== undefined ) {
target[ name ] = copy;
}
}
// jQuery的静态方法集合
jQuery.extend( {
// 每个jQuery实例在页面上的唯一标识符
expando: "jQuery" + ( version + Math.random() ).replace( /\D/g, "" ),
// 假设没有ready模块时,jQuery已准备好
isReady: true,
// 错误处理函数
error: function( msg ) {
throw new Error( msg );
},
// 空函数,常用于回调占位
noop: function() {},
// 判断对象是否为函数
isFunction: function( obj ) {
return jQuery.type( obj ) === "function";
},
// 判断对象是否为数组
isArray: Array.isArray || function( obj ) {
return jQuery.type( obj ) === "array";
},
// 判断对象是否为窗口对象
isWindow: function( obj ) {
return obj != null && obj == obj.window;
},
// 判断对象是否为数字
isNumeric: function( obj ) {
var realStringObj = obj && obj.toString();
return !jQuery.isArray( obj ) && ( realStringObj - parseFloat( realStringObj ) + 1 ) >= 0;
},
// 判断对象是否为空对象
isEmptyObject: function( obj ) {
var name;
for ( name in obj ) {
return false;
}
return true;
},
// 判断对象是否为纯对象(即直接通过{}或new Object()创建的对象)
isPlainObject: function( obj ) {
var key;
if ( !obj || jQuery.type( obj ) !== "object" || obj.nodeType || jQuery.isWindow( obj ) ) {
return false;
}
try {
if ( obj.constructor &&
!hasOwn.call( obj, "constructor" ) &&
!hasOwn.call( obj.constructor.prototype, "isPrototypeOf" ) ) {
return false;
}
} catch ( e ) {
return false;
}
if ( !support.ownFirst ) {
for ( key in obj ) {
return hasOwn.call( obj, key );
}
}
for ( key in obj ) {}
return key === undefined || hasOwn.call( obj, key );
},
// 获取对象的类型
type: function( obj ) {
if ( obj == null ) {
return obj + "";
}
return typeof obj === "object" || typeof obj === "function" ?
class2type[ toString.call( obj ) ] || "object" :
typeof obj;
},
// 在全局上下文中执行JavaScript代码
globalEval: function( data ) {
if ( data && jQuery.trim( data ) ) {
( window.execScript || function( data ) {
window[ "eval" ].call( window, data );
} )( data );
}
},
// 将字符串从dashed转换为camelCase
camelCase: function( string ) {
return string.replace( rmsPrefix, "ms-" ).replace( rdashAlpha, fcamelCase );
},
// 检查元素是否具有指定的节点名称
nodeName: function( elem, name ) {
return elem.nodeName && elem.nodeName.toLowerCase() === name.toLowerCase();
},
// 遍历对象或数组。
each: function( obj, callback ) {
var length, i = 0;
if ( isArrayLike( obj ) ) {
length = obj.length;
for ( ; i < length; i++ ) {
if ( callback.call( obj[ i ], i, obj[ i ] ) === false ) {
break;
}
}
} else {
for ( i in obj ) {
if ( callback.call( obj[ i ], i, obj[ i ] ) === false ) {
break;
}
}
}
return obj;
},
});
// Support: Android<4.1, IE<9
// 去除字符串两端的空白字符
trim: function(text) {
// 如果text为null或undefined,则返回空字符串
return text == null ?
"" :
// 将text转换为字符串(如果text不是字符串的话),然后使用正则表达式去除两端的空白字符
(text + "").replace(rtrim, "");
},
// 将类数组对象或可迭代对象转换为真正的数组,results是内部使用参数,用于存储转换结果
makeArray: function(arr, results) {
var ret = results || []; // 如果没有传入results,则初始化为空数组
if (arr != null) { // 如果arr不为null或undefined
// 判断arr是否类似数组
if (isArrayLike(Object(arr))) {
// 如果是字符串,则将其放入数组中,否则直接使用arr
jQuery.merge(ret,
typeof arr === "string" ?
[arr] : arr
);
} else {
// 使用push方法将arr添加到ret数组中
push.call(ret, arr);
}
}
return ret; // 返回转换后的数组
},
// 判断元素是否在数组中,返回元素的索引,如果不在则返回-1
inArray: function(elem, arr, i) {
var len;
if (arr) { // 如果数组不为空
if (indexOf) { // 如果indexOf方法存在(现代浏览器)
return indexOf.call(arr, elem, i); // 使用indexOf查找元素索引
}
len = arr.length; // 获取数组长度
i = i ? i < 0 ? Math.max(0, len + i) : i : 0; // 处理负数索引
// 遍历数组,查找元素
for (; i < len; i++) {
// 跳过稀疏数组中的空位
if (i in arr && arr[i] === elem) {
return i; // 找到元素,返回索引
}
}
}
return -1; // 未找到元素,返回-1
},
// 合并两个数组,将第二个数组的元素添加到第一个数组中
merge: function(first, second) {
var len = +second.length, // 获取second数组的长度(转换为数字)
j = 0,
i = first.length; // 获取first数组的长度
// 使用while循环将second数组的元素添加到first数组中
while (j < len) {
first[i++] = second[j++];
}
// 支持IE<9,处理类数组对象(如NodeLists)的长度属性可能不是数字的情况
if (len !== len) { // 如果len转换为数字后与自身不相等(NaN的情况)
while (second[j] !== undefined) { // 继续添加元素,直到second[j]为undefined
first[i++] = second[j++];
}
}
first.length = i; // 更新first数组的长度
return first; // 返回合并后的数组
},
// 使用回调函数过滤数组,返回满足条件的元素组成的新数组
grep: function(elems, callback, invert) {
var callbackInverse,
matches = [],
i = 0,
length = elems.length,
callbackExpect = !invert; // 根据invert的值确定callback的期望返回值(true或false)
// 遍历数组,将满足条件的元素添加到matches数组中
for (; i < length; i++) {
callbackInverse = !callback(elems[i], i); // 调用回调函数,并取反
if (callbackInverse !== callbackExpect) { // 如果回调函数的返回值与期望不符
matches.push(elems[i]); // 将元素添加到matches数组中
}
}
return matches; // 返回过滤后的数组
},
// 对数组或对象进行映射,返回一个新数组,数组中的每个元素都是回调函数处理后的结果
map: function(elems, callback, arg) {
var length, value,
i = 0,
ret = []; // 初始化返回数组
// 判断elems是否是类数组对象
if (isArrayLike(elems)) {
length = elems.length; // 获取elems的长度
// 遍历elems数组
for (; i < length; i++) {
value = callback(elems[i], i, arg); // 调用回调函数处理元素
if (value != null) { // 如果回调函数返回值不为null或undefined
ret.push(value); // 将返回值添加到ret数组中
}
}
} else {
// 如果elems不是类数组对象,则遍历其所有属性
for (i in elems) {
value = callback(elems[i], i, arg); // 调用回调函数处理元素
if (value != null) { // 如果回调函数返回值不为null或undefined
ret.push(value); // 将返回值添加到ret数组中
}
}
}
// 使用concat方法将ret数组中的嵌套数组展平
return concat.apply([], ret);
},
// 全局GUID计数器,用于生成唯一标识符
guid: 1,
// 绑定函数到指定上下文,并可选地预设一些参数
proxy: function(fn, context) {
var args, proxy, tmp;
// 如果context是字符串,则假设是要绑定到fn的某个方法上
if (typeof context === "string") {
tmp = fn[context];
context = fn;
fn = tmp;
}
// 检查fn是否为函数,如果不是则返回undefined
if (!jQuery.isFunction(fn)) {
return undefined;
}
// 保存额外参数
args = slice.call(arguments, 2);
// 创建代理函数
proxy = function() {
// 将预设参数和当前调用的参数合并,然后调用原函数
return fn.apply(context || this, args.concat(slice.call(arguments)));
};
// 设置代理函数的guid,以便可以移除事件监听器等
proxy.guid = fn.guid = fn.guid || jQuery.guid++;
return proxy; // 返回代理函数
},
// 获取当前时间的毫秒数
now: function() {
return +(new Date()); // 返回Date对象的时间戳(毫秒数)
},
// jQuery.support已不在核心中使用,但其他项目可能会附加属性到它上面,因此需要保留
support: support
});
// 以下代码块由于使用了ES6的Symbol,可能会导致JSHint报错,因此使用注释忽略JSHint的检查
/* jshint ignore: start */
if (typeof Symbol === "function") {
jQuery.fn[Symbol.iterator] = deletedIds[Symbol.iterator]; // 为jQuery对象设置Symbol.iterator属性,以便支持迭代
}
/* jshint ignore: end */
// 填充class2type映射表
jQuery.each("Boolean Number String Function Array Date RegExp Object Error Symbol".split(" "),
function(i, name) {
class2type["[object " + name + "]"] = name.toLowerCase(); // 将类名字符串映射为小写形式并存储在class2type对象中
});
// 判断一个对象是否类似数组
function isArrayLike(obj) {
var length = !!obj && "length" in obj && obj.length, // 获取对象的length属性(如果存在的话)
type = jQuery.type(obj); // 获取对象的类型
// 如果对象是函数或window对象,则不是类似数组
if (type === "function" || jQuery.isWindow(obj)) {
return false;
}
// 返回对象是否为数组或长度大于0且length-1索引存在的对象(处理稀疏数组)
return type === "array" || length === 0 ||
typeof length === "number" && length > 0 && (length - 1) in obj;
}
var Sizzle =
/*!
* Sizzle CSS Selector Engine v2.2.1
* http://sizzlejs.com/
*
* Copyright jQuery Foundation and other contributors
* Released under the MIT license
* http://jquery.org/license
*
* Date: 2015-10-17
*/
(function(window) {
// 省略Sizzle选择器引擎的代码...
});
// 创建一个独特的expando属性名,用于存储数据,结合当前时间戳
expando = "sizzle" + 1 * new Date(),
// 获取全局的document对象
preferredDoc = window.document,
// 运行方向计数器(可能用于跟踪查询的执行顺序)
dirruns = 0,
// 完成标志(可能用于跟踪查询是否已完成)
done = 0,
// 创建缓存对象,用于存储类名、标记和编译器的缓存
classCache = createCache(),
tokenCache = createCache(),
compilerCache = createCache(),
// 排序函数,用于排序,如果两个元素相同,则标记有重复
sortOrder = function( a, b ) {
if ( a === b ) {
hasDuplicate = true;
}
return 0;
},
// 常量定义
MAX_NEGATIVE = 1 << 31,
// 实例方法
hasOwn = ({}).hasOwnProperty,
arr = [],
pop = arr.pop,
push_native = arr.push,
push = arr.push, // 注意:这里push被重新赋值,下面会解释
slice = arr.slice,
// 自定义的indexOf方法,用于查找元素在数组中的位置
indexOf = function( list, elem ) {
var i = 0,
len = list.length;
for ( ; i < len; i++ ) {
if ( list[i] === elem ) {
return i;
}
}
return -1;
},
// 布尔属性字符串,用于快速检查元素是否具有这些属性
booleans = "checked|selected|async|autofocus|autoplay|controls|defer|disabled|hidden|ismap|loop|multiple|open|readonly|required|scoped",
// 正则表达式定义,用于匹配不同类型的选择器
// ...(省略了具体的正则表达式定义,因为它们很长且专注于选择器解析)
// matchExpr对象,用于快速匹配不同类型的选择器
matchExpr = {
// ...(省略了具体的匹配规则)
},
// 用于检查元素类型的正则表达式
rinputs = /^(?:input|select|textarea|button)$/i,
rheader = /^h\d$/i,
// 用于检测原生方法的正则表达式
rnative = /^[^{]+\{\s*\[native \w/,
// 快速表达式匹配,用于解析ID、标签或类选择器
rquickExpr = /^(?:#([\w-]+)|(\w+)|\.([\w-]+))$/,
// 用于匹配兄弟选择器的正则表达式
rsibling = /[+~]/,
rescape = /'|\\/g,
// CSS转义字符的正则表达式和函数
runescape = new RegExp( "\\\\([\\da-f]{1,6}" + whitespace + "?|(" + whitespace + ")|.)", "ig" ),
funescape = function( _, escaped, escapedWhitespace ) {
// ...(省略了具体的转义逻辑)
},
// 卸载处理器,用于在页面卸载时重置文档
unloadHandler = function() {
setDocument();
};
// 优化push.apply的使用,尝试直接应用NodeList到数组
try {
push.apply(
(arr = slice.call( preferredDoc.childNodes )),
preferredDoc.childNodes
);
// 尝试访问最后一个元素的nodeType来检测是否成功
arr[ preferredDoc.childNodes.length ].nodeType;
} catch ( e ) {
// 如果失败,则使用替代的push方法
push = { apply: arr.length ?
// 如果原生slice可用,则使用它
function( target, els ) {
push_native.apply( target, slice.call(els) );
} :
// 否则,逐个添加元素到目标数组
function( target, els ) {
var j = target.length,
i = 0;
while ( (target[j++] = els[i++]) ) {}
target.length = j - 1;
}
};
}
// Sizzle函数,是选择器引擎的核心
function Sizzle( selector, context, results, seed ) {
var m, i, elem, nid, nidselect, match, groups, newSelector,
newContext = context && context.ownerDocument,
nodeType = context ? context.nodeType : 9; // 9代表document节点
results = results || [];
// 如果选择器不是字符串、为空、或者上下文节点类型不正确,则直接返回空结果
if ( typeof selector !== "string" || !selector ||
nodeType !== 1 && nodeType !== 9 && nodeType !== 11 ) {
return results;
}
// ...(省略了Sizzle函数的具体实现,因为这部分非常长且复杂)
}
// 如果seed参数为假(即没有提供初始的匹配元素集合)
if ( !seed ) {
// 如果提供的上下文(context)不是当前文档,则设置文档为上下文
// 如果没有提供上下文,则使用preferredDoc(优先文档)作为上下文
// 如果上下文是一个元素,则使用它的ownerDocument(拥有它的文档)作为上下文
if ( ( context ? context.ownerDocument || context : preferredDoc ) !== document ) {
setDocument( context );
}
// 如果没有提供上下文,则默认使用document作为上下文
context = context || document;
// 如果文档是HTML文档
if ( documentIsHTML ) {
// 如果选择器足够简单,尝试使用"get*By*" DOM方法(除了DocumentFragment上下文,因为DocumentFragment上没有这些方法)
if ( nodeType !== 11 && (match = rquickExpr.exec( selector )) ) {
// ID选择器
if ( (m = match[1]) ) {
// 文档上下文
if ( nodeType === 9 ) {
if ( (elem = context.getElementById( m )) ) {
// 支持:IE, Opera, Webkit
// TODO: 识别版本
// getElementById可能会根据名称而不是ID匹配元素
if ( elem.id === m ) {
results.push( elem );
return results;
}
} else {
return results;
}
// 元素上下文
} else {
// 支持:IE, Opera, Webkit
// TODO: 识别版本
// getElementById可能会根据名称而不是ID匹配元素
if ( newContext && (elem = newContext.getElementById( m )) &&
contains( context, elem ) &&
elem.id === m ) {
results.push( elem );
return results;
}
}
// 类型选择器
} else if ( match[2] ) {
push.apply( results, context.getElementsByTagName( selector ) );
return results;
// 类选择器
} else if ( (m = match[3]) && support.getElementsByClassName &&
context.getElementsByClassName ) {
push.apply( results, context.getElementsByClassName( m ) );
return results;
}
}
// 使用querySelectorAll
if ( support.qsa &&
!compilerCache[ selector + " " ] &&
(!rbuggyQSA || !rbuggyQSA.test( selector )) ) {
if ( nodeType !== 1 ) {
newContext = context;
newSelector = selector;
// qSA会在元素上下文之外查找,这不是我们想要的
// 感谢Andrew Dupont提供的这种解决方法
// 支持:IE <=8
// 排除对象元素
} else if ( context.nodeName.toLowerCase() !== "object" ) {
// 捕获上下文的ID,如果必要则先设置它
if ( (nid = context.getAttribute( "id" )) ) {
nid = nid.replace( rescape, "\\$&" );
} else {
context.setAttribute( "id", (nid = expando) );
}
// 在列表中的每个选择器前加上前缀
groups = tokenize( selector );
i = groups.length;
nidselect = ridentifier.test( nid ) ? "#" + nid : "[id='" + nid + "']";
while ( i-- ) {
groups[i] = nidselect + " " + toSelector( groups[i] );
}
newSelector = groups.join( "," );
// 为兄弟选择器扩展上下文
newContext = rsibling.test( selector ) && testContext( context.parentNode ) ||
context;
}
if ( newSelector ) {
try {
push.apply( results,
newContext.querySelectorAll( newSelector )
);
return results;
} catch ( qsaError ) {
} finally {
if ( nid === expando ) {
context.removeAttribute( "id" );
}
}
}
}
}
// 其他情况
return select( selector.replace( rtrim, "$1" ), context, results, seed );
}
/**
* 创建一个有限大小的键值缓存
* @returns {function(string, object)} 返回一个在存储后将数据对象存储在自身上的函数,属性名为(空格后缀)字符串,
* 如果缓存大于Expr.cacheLength,则删除最旧的条目
*/
function createCache() {
var keys = [];
function cache( key, value ) {
// 使用(key + " ")以避免与原生原型属性冲突(见Issue #157)
if ( keys.push( key + " " ) > Expr.cacheLength ) {
// 仅保留最近的条目
delete cache[ keys.shift() ];
}
return (cache[ key + " " ] = value);
}
return cache;
}
/**
* 为Sizzle特殊使用标记一个函数
* @param {Function} fn 要标记的函数
*/
function markFunction( fn ) {
fn[ expando ] = true;
return fn;
}
/**
* 使用一个元素支持测试
* @param {Function} fn 传入创建的div,并期望一个布尔结果
*/
function assert( fn ) {
var div = document.createElement("div");
try {
return !!fn( div );
} catch (e) {
return false;
} finally {
// 默认情况下从其父节点中移除
if ( div.parentNode ) {
div.parentNode.removeChild( div );
}
// 在IE中释放内存
div = null;
}
}
/**
* 为指定的attrs添加相同的处理器
* @param {String} attrs 由管道分隔的属性列表
* @param {Function} handler 将要应用的方法
*/
function addHandle( attrs, handler ) {
var arr = attrs.split("|"),
i = arr.length;
while ( i-- ) {
Expr.attrHandle[ arr[i] ] = handler;
}
}
/**
* 检查两个兄弟节点的文档顺序
* @param {Element} a
* @param {Element} b
* @returns {Number} 如果a在b之前,则返回小于0的值;如果a在b之后,则返回大于0的值
*/
function siblingCheck( a, b ) {
var cur = b && a,
diff = cur && a.nodeType === 1 && b.nodeType === 1 &&
( ~b.sourceIndex || MAX_NEGATIVE ) -
( ~a.sourceIndex || MAX_NEGATIVE );
// 如果可用,则使用IE的sourceIndex
if ( diff ) {
return diff;
}
// 检查b是否在a之后
if ( cur ) {
while ( (cur = cur.nextSibling) ) {
if ( cur === b ) {
return -1;
}
}
}
return a ? 1 : -1;
}
/**
* Returns a function to use in pseudos for input types
* @param // 创建一个函数,用于生成一个判断元素是否为特定类型input的函数
/**
* @param {String} type - input元素的类型
* @returns {Function} - 一个函数,用于判断给定的元素是否是一个特定类型的input
*/
function createInputPseudo( type ) {
return function( elem ) {
var name = elem.nodeName.toLowerCase(); // 获取元素的节点名称并转换为小写
return name === "input" && elem.type === type; // 判断元素是否是一个特定类型的input
};
}
// 创建一个函数,用于生成一个判断元素是否为特定类型按钮的函数
/**
* @param {String} type - 按钮的类型
* @returns {Function} - 一个函数,用于判断给定的元素是否是一个特定类型的按钮
*/
function createButtonPseudo( type ) {
return function( elem ) {
var name = elem.nodeName.toLowerCase(); // 获取元素的节点名称并转换为小写
// 判断元素是否是一个input或button,并且其type属性与给定的类型相匹配
return (name === "input" || name === "button") && elem.type === type;
};
}
// 创建一个函数,用于生成一个处理位置伪类的函数
/**
* @param {Function} fn - 一个函数,用于根据给定的参数和种子集合计算匹配索引
* @returns {Function} - 一个函数,用于根据给定的参数和种子集合以及匹配集合,标记匹配的元素
*/
function createPositionalPseudo( fn ) {
return markFunction(function( argument ) {
argument = +argument; // 将参数转换为数字
return markFunction(function( seed, matches ) {
var j,
matchIndexes = fn( [], seed.length, argument ), // 根据参数和种子集合计算匹配索引
i = matchIndexes.length;
// 遍历匹配索引,标记匹配的元素
while ( i-- ) {
if ( seed[ (j = matchIndexes[i]) ] ) {
seed[j] = !(matches[j] = seed[j]);
}
}
});
});
}
// 检查一个节点是否可以作为Sizzle的上下文
/**
* @param {Element|Object=} context - 要检查的上下文
* @returns {Element|Object|Boolean} - 如果上下文可接受,则返回该节点;否则返回falsy值
*/
function testContext( context ) {
return context && typeof context.getElementsByTagName !== "undefined" && context;
}
// 暴露支持变量以便于使用
support = Sizzle.support = {};
// 检测XML节点
/**
* @param {Element|Object} elem - 一个元素或文档对象
* @returns {Boolean} - 如果elem是一个非HTML的XML节点,则返回true;否则返回false
*/
isXML = Sizzle.isXML = function( elem ) {
var documentElement = elem && (elem.ownerDocument || elem).documentElement;
return documentElement ? documentElement.nodeName !== "HTML" : false;
};
// 设置文档相关的变量,基于当前的文档
/**
* @param {Element|Object} [doc] - 一个元素或文档对象,用于设置文档
* @returns {Object} - 返回当前的文档
*/
setDocument = Sizzle.setDocument = function( node ) {
var hasCompare, parent,
doc = node ? node.ownerDocument || node : preferredDoc;
// 如果文档无效或已选择,则提前返回
if ( doc === document || doc.nodeType !== 9 || !doc.documentElement ) {
return document;
}
// 更新全局变量
document = doc;
docElem = document.documentElement;
documentIsHTML = !isXML( document );
// 支持:IE 9-11, Edge
// 访问iframe文档后卸载时会抛出“权限被拒绝”错误(jQuery #13936)
if ( (parent = document.defaultView) && parent.top !== parent ) {
// 支持:IE 11
if ( parent.addEventListener ) {
parent.addEventListener( "unload", unloadHandler, false );
// 支持:IE 9 - 10 only
} else if ( parent.attachEvent ) {
parent.attachEvent( "onunload", unloadHandler );
}
}
/* Attributes
---------------------------------------------------------------------- */
// 支持:IE<8
// 验证getAttribute是否真正返回属性而不是属性(除了IE8的布尔值)
support.attributes = assert(function( div ) {
div.className = "i";
return !div.getAttribute("className");
});
/* getElement(s)By*
---------------------------------------------------------------------- */
// 检查getElementsByTagName("*")是否只返回元素
support.getElementsByTagName = assert(function( div ) {
div.appendChild( document.createComment("") );
return !div.getElementsByTagName("*").length;
});
// 支持:IE<9
support.getElementsByClassName = rnative.test( document.getElementsByClassName );
// 支持:IE<10
// 检查getElementById是否按名称返回元素
// 损坏的getElementById方法不会拾取以编程方式设置的名称,
// 因此使用一种迂回的getElementsByName测试
support.getById = assert(function( div ) {
docElem.appendChild( div ).id = expando;
return !document.getElementsByName || !document.getElementsByName( expando ).length;
});
// ID查找和过滤
if ( support.getById ) {
// 如果支持getElementById,则设置ID查找和过滤函数
Expr.find["ID"] = function( id, context ) {
if ( typeof context.getElementById !== "undefined" && documentIsHTML ) {
var m = context.getElementById( id );
return m ? [ m ] : [];
}
};
Expr.filter["ID"] = function( id ) {
var attrId = id.replace( runescape, funescape );
return function( elem ) {
return elem.getAttribute("id") === attrId;
};
};
} else {
// 如果不支持getElementById,则删除ID查找函数,并设置ID过滤函数
// 支持:IE6/7
// getElementById不是作为查找快捷方式的可靠方法
delete Expr.find["ID"];
Expr.filter["ID"] = function( id ) {
var attrId = id.replace( runescape, funescape );
return function( elem ) {
var node = typeof elem.getAttributeNode !== "undefined" &&
elem.getAttributeNode("id");
return node && node.value === attrId;
};
};
}
// Tag(标签)
// 如果支持getElementsByTagName,则设置标签查找函数
Expr.find["TAG"] = support.getElementsByTagName ?
function( tag, context ) {
if ( typeof context.getElementsByTagName !== "undefined" ) {
return context.getElementsByTagName( tag );
// DocumentFragment节点没有gEBTN
} else if ( support.qsa ) {
return context.querySelectorAll( tag );
}
} :
// 如果不支持getElementsByTagName,则设置标签查找函数
function( tag, context ) {
var elem,
tmp = [],
i = 0,
// 幸运的是,一个损坏的gEBTN也出现在DocumentFragment节点上
results = context.getElementsByTagName( tag );
// 此处代码被截断,通常应包含遍历results并处理每个元素的逻辑
};
if ( tag === "*" ) {
while ( (elem = results[i++]) ) {
if ( elem.nodeType === 1 ) {
tmp.push( elem );
}
}
return tmp;
}
return results;
};
// Class
Expr.find["CLASS"] = support.getElementsByClassName && function( className, context ) {
if ( typeof context.getElementsByClassName !== "undefined" && documentIsHTML ) {
return context.getElementsByClassName( className );
}
};
/* QSA/matchesSelector
---------------------------------------------------------------------- */
// QSA and matchesSelector support
// matchesSelector(:active) reports false when true (IE9/Opera 11.5)
rbuggyMatches = [];
// qSa(:focus) reports false when true (Chrome 21)
// We allow this because of a bug in IE8/9 that throws an error
// whenever `document.activeElement` is accessed on an iframe
// So, we allow :focus to pass through QSA all the time to avoid the IE error
// See http://bugs.jquery.com/ticket/13378
rbuggyQSA = [];
if ( (support.qsa = rnative.test( document.querySelectorAll )) ) {
// Build QSA regex
// Regex strategy adopted from Diego Perini
assert(function( div ) {
// Select is set to empty string on purpose
// This is to test IE's treatment of not explicitly
// setting a boolean content attribute,
// since its presence should be enough
// http://bugs.jquery.com/ticket/12359
docElem.appendChild( div ).innerHTML = "" +
"";
// Support: IE8, Opera 11-12.16
// Nothing should be selected when empty strings follow ^= or $= or *=
// The test attribute must be unknown in Opera but "safe" for WinRT
// http://msdn.microsoft.com/en-us/library/ie/hh465388.aspx#attribute_section
if ( div.querySelectorAll("[msallowcapture^='']").length ) {
rbuggyQSA.push( "[*^$]=" + whitespace + "*(?:''|\"\")" );
}
// Support: IE8
// Boolean attributes and "value" are not treated correctly
if ( !div.querySelectorAll("[selected]").length ) {
rbuggyQSA.push( "\\[" + whitespace + "*(?:value|" + booleans + ")" );
}
// Support: Chrome<29, Android<4.4, Safari<7.0+, iOS<7.0+, PhantomJS<1.9.8+
if ( !div.querySelectorAll( "[id~=" + expando + "-]" ).length ) {
rbuggyQSA.push("~=");
}
// Webkit/Opera - :checked should return selected option elements
// http://www.w3.org/TR/2011/REC-css3-selectors-20110929/#checked
// IE8 throws error here and will not see later tests
if ( !div.querySelectorAll(":checked").length ) {
rbuggyQSA.push(":checked");
}
// Support: Safari 8+, iOS 8+
// https://bugs.webkit.org/show_bug.cgi?id=136851
// In-page `selector#id sibing-combinator selector` fails
if ( !div.querySelectorAll( "a#" + expando + "+*" ).length ) {
rbuggyQSA.push(".#.+[+~]");
}
});
assert(function( div ) {
// Support: Windows 8 Native Apps
// The type and name attributes are restricted during .innerHTML assignment
var input = document.createElement("input");
input.setAttribute( "type", "hidden" );
div.appendChild( input ).setAttribute( "name", "D" );
// Support: IE8
// Enforce case-sensitivity of name attribute
if ( div.querySelectorAll("[name=d]").length ) {
rbuggyQSA.push( "name" + whitespace + "*[*^$|!~]?=" );
}
// FF 3.5 - :enabled/:disabled and hidden elements (hidden elements are still enabled)
// IE8 throws error here and will not see later tests
if ( !div.querySelectorAll(":enabled").length ) {
rbuggyQSA.push( ":enabled", ":disabled" );
}
// Opera 10-11 does not throw on post-comma invalid pseudos
div.querySelectorAll("*,:x");
rbuggyQSA.push(",.*:");
});
}
if ( (support.matchesSelector = rnative.test( (matches = docElem.matches ||
docElem.webkitMatchesSelector ||
docElem.mozMatchesSelector ||
docElem.oMatchesSelector ||
docElem.msMatchesSelector) )) ) {
assert(function( div ) {
// Check to see if it's possible to do matchesSelector
// on a disconnected node (IE 9)
support.disconnectedMatch = matches.call( div, "div" );
// This should fail with an exception
// Gecko does not error, returns false instead
matches.call( div, "[s!='']:x" );
rbuggyMatches.push( "!=", pseudos );
});
}
rbuggyQSA = rbuggyQSA.length && new RegExp( rbuggyQSA.join("|") );
rbuggyMatches = rbuggyMatches.length && new RegExp( rbuggyMatches.join("|") );
/* Contains
---------------------------------------------------------------------- */
hasCompare = rnative.test( docElem.compareDocumentPosition );
// Element contains another
// Purposefully self-exclusive
// As in, an element does not contain itself
contains = hasCompare || rnative.test( docElem.contains ) ?
function( a, b ) {
var adown = a.nodeType === 9 ? a.documentElement : a,
bup = b && b.parentNode;
return a === bup || !!( bup && bup.nodeType === 1 && (
adown.contains ?
adown.contains( bup ) :
a.compareDocumentPosition && a.compareDocumentPosition( bup ) & 16
));
} :
function( a, b ) {
if ( b ) {
while ( (b = b.parentNode) ) {
if ( b === a ) {
return true;
}
}
}
return false;
};
/* Sorting
---------------------------------------------------------------------- */
// Document order sorting
sortOrder = hasCompare ?
function( a, b ) {
// Flag for duplicate removal
if ( a === b ) {
hasDuplicate = true;
return 0;
}
// Sort on method existence if only one input has compareDocumentPosition
var compare = !a.compareDocumentPosition - !b.compareDocumentPosition;
if ( compare ) {
return compare;
}
// Calculate position if both inputs belong to the same document
compare = ( a.ownerDocument || a ) === ( b.ownerDocument || b ) ?
a.compareDocumentPosition( b ) :
// Otherwise we know they are disconnected
1;
// Disconnected nodes
if ( compare & 1 ||
(!support.sortDetached && b.compareDocumentPosition( a ) === compare) ) {
// Choose the first element that is related to our preferred document
if ( a === document || a.ownerDocument === preferredDoc && contains(preferredDoc, a) ) {
return -1;
}
if ( b === document || b.ownerDocument === preferredDoc && contains(preferredDoc, b) ) {
return 1;
}
// Maintain original order
return sortInput ?
( indexOf( sortInput, a ) - indexOf( sortInput, b ) ) :
0;
}
return compare & 4 ? -1 : 1;
} :
// 定义一个比较函数,用于比较两个DOM节点a和b
function( a, b ) {
// 如果节点a和b相同,则标记为有重复,并返回0
if ( a === b ) {
hasDuplicate = true;
return 0;
}
var cur,
i = 0,
aup = a.parentNode, // a的父节点
bup = b.parentNode, // b的父节点
ap = [ a ], // a的祖先节点数组,初始包含a自身
bp = [ b ]; // b的祖先节点数组,初始包含b自身
// 如果节点没有父节点,则它们可能是文档节点或已断开的节点
if ( !aup || !bup ) {
// 如果a是文档节点,则返回-1;如果b是文档节点,则返回1
// 如果a或b之一有父节点但另一个没有,则分别返回-1或1
// 如果提供了sortInput数组,则比较a和b在sortInput中的索引
return a === document ? -1 :
b === document ? 1 :
aup ? -1 :
bup ? 1 :
sortInput ?
( indexOf( sortInput, a ) - indexOf( sortInput, b ) ) :
0;
// 如果a和b有相同的父节点,则进行兄弟节点比较
} else if ( aup === bup ) {
return siblingCheck( a, b ); // 调用siblingCheck函数比较a和b
}
// 否则,需要获取a和b的完整祖先节点列表进行比较
cur = a;
while ( (cur = cur.parentNode) ) {
ap.unshift( cur ); // 将a的每个祖先节点添加到数组ap的开头
}
cur = b;
while ( (cur = cur.parentNode) ) {
bp.unshift( cur ); // 将b的每个祖先节点添加到数组bp的开头
}
// 从根节点开始向下遍历,寻找不同的祖先节点
while ( ap[i] === bp[i] ) {
i++;
}
// 如果找到了不同的祖先节点,则进行兄弟节点比较
// 否则,比较哪个节点属于我们的首选文档(可能是为了处理跨文档的比较)
return i ?
siblingCheck( ap[i], bp[i] ) :
ap[i] === preferredDoc ? -1 :
bp[i] === preferredDoc ? 1 :
0;
};
// 返回一个文档对象(这里看起来像是代码片段的一部分,可能缺少上下文)
return document;
};
// Sizzle.matches方法,用于检查给定的表达式是否匹配一组元素
Sizzle.matches = function( expr, elements ) {
return Sizzle( expr, null, null, elements );
};
// Sizzle.matchesSelector方法,用于检查一个元素是否匹配给定的选择器
Sizzle.matchesSelector = function( elem, expr ) {
// 设置文档变量(如果需要)
if ( ( elem.ownerDocument || elem ) !== document ) {
setDocument( elem );
}
// 确保属性选择器被正确引用
expr = expr.replace( rattributeQuotes, "='$1']" );
// 尝试使用原生的matchesSelector方法(如果可用且没有bug)
// 如果不可用或存在bug,则回退到Sizzle自己的选择器逻辑
try {
var ret = matches.call( elem, expr );
if ( ret || 有针对断开节点的特殊处理 || elem在文档中且非文档片段 ) {
return ret;
}
} catch (e) {}
// 如果原生方法失败,使用Sizzle选择器
return Sizzle( expr, document, null, [ elem ] ).length > 0;
};
// Sizzle.contains方法,用于检查一个元素是否包含另一个元素
Sizzle.contains = function( context, elem ) {
// 设置文档变量(如果需要)
if ( ( context.ownerDocument || context ) !== document ) {
setDocument( context );
}
return contains( context, elem ); // 调用contains函数检查包含关系
};
// Sizzle.attr方法,用于获取元素的属性值
Sizzle.attr = function( elem, name ) {
// 设置文档变量(如果需要)
if ( ( elem.ownerDocument || elem ) !== document ) {
setDocument( elem );
}
// 尝试使用特定的属性处理器(如果存在)
var fn = Expr.attrHandle[ name.toLowerCase() ],
val = fn && hasOwn.call( Expr.attrHandle, name.toLowerCase() ) ?
fn( elem, name, !documentIsHTML ) :
undefined;
// 如果特定的属性处理器没有返回值,则使用原生方法或回退逻辑获取属性值
return val !== undefined ?
val :
support.attributes || !documentIsHTML ?
elem.getAttribute( name ) :
(val = elem.getAttributeNode(name)) && val.specified ?
val.value :
null;
};
// Sizzle.error方法,用于抛出语法错误
Sizzle.error = function( msg ) {
throw new Error( "Syntax error, unrecognized expression: " + msg );
};
// Sizzle.uniqueSort方法,用于对结果数组进行排序并移除重复项
Sizzle.uniqueSort = function( results ) {
var elem,
duplicates = [],
j = 0,
i = 0;
// 除非我们知道可以检测重复项,否则假设存在重复项
hasDuplicate = !support.detectDuplicates;
sortInput = !support.sortStable && results.slice( 0 ); // 如果排序不稳定,则复制结果数组
results.sort( sortOrder ); // 对结果数组进行排序
// 如果存在重复项,则找出并移除它们
if ( hasDuplicate ) {
while ( (elem = results[i++]) ) {
if ( elem === results[ i ] ) {
j = duplicates.push( i );
}
}
while ( j-- ) {
results.splice( duplicates[ j ], 1 ); // 移除重复项
}
}
// 排序后清除输入数组以释放对象(性能优化)
sortInput = null;
return results; // 返回处理后的结果数组
};
// Sizzle.getText方法,用于获取DOM节点或节点数组的文本值
getText = Sizzle.getText = function( elem ) {
var node,
ret = "",
i = 0,
nodeType = elem.nodeType;
// 如果elem没有nodeType,则假设它是一个数组
if ( !nodeType ) {
while ( (node = elem[i++]) ) {
// 不遍历注释节点
ret += getText( node );
}
} else if ( nodeType === 1 || nodeType === 9 || nodeType === 11 ) {
// 对于元素节点、文档节点或文档片段节点,使用textContent
if ( typeof elem.textContent === "string" ) {
return elem.textContent;
} else {
// 遍历其子节点
for ( elem = elem.firstChild; elem; elem = elem.nextSibling ) {
ret += getText( elem );
}
}
} else if ( nodeType === 3 || nodeType === 4 ) {
// 对于文本节点或CDATA节点,直接返回其nodeValue
return elem.nodeValue;
}
// 不包括注释节点或处理指令节点
return ret;
};
Expr = Sizzle.selectors = {
// 用户可以调整的设置
cacheLength: 50, // 缓存长度
createPseudo: markFunction, // 创建伪类的函数
match: matchExpr, // 用于匹配选择器的表达式对象
attrHandle: {}, // 属性处理的映射对象
find: {}, // 查找方法的映射对象
relative: { // 相对选择器
">": { dir: "parentNode", first: true }, // 直接子元素
" ": { dir: "parentNode" }, // 后代元素(空格分隔)
"+": { dir: "previousSibling", first: true }, // 紧邻的前一个兄弟元素
"~": { dir: "previousSibling" } // 之前所有的兄弟元素
},
preFilter: { // 预过滤器,用于预处理选择器字符串
"ATTR": function( match ) {
// 处理属性选择器,如[attr=value]
// 对匹配项中的值和操作符进行转义处理
// 并根据操作符调整匹配项的结构
return match.slice( 0, 4 );
},
"CHILD": function( match ) {
// 处理子选择器,如:nth-child(n)
// 将匹配项转换为可用于筛选的格式
return match;
},
"PSEUDO": function( match ) {
// 处理伪类选择器,如:hover
// 对匹配项进行必要的调整和验证
return match.slice( 0, 3 );
}
},
filter: { // 过滤器,用于进一步筛选DOM元素
"TAG": function( nodeNameSelector ) {
// 处理标签选择器,如div
return function( elem ) {
// 检查元素是否匹配指定的标签名
return elem.nodeName && elem.nodeName.toLowerCase() === nodeNameSelector.toLowerCase();
};
},
"CLASS": function( className ) {
// 处理类选择器,如.myClass
var pattern = classCache[ className + " " ];
// 构造或获取用于匹配类名的正则表达式
// 并返回一个函数,用于检查元素是否包含指定的类名
return pattern ||
(pattern = new RegExp( "(^|" + whitespace + ")" + className + "(" + whitespace + "|$)" )) &&
classCache( className, function( elem ) {
return pattern.test( "string" == typeof elem.className && elem.className || typeof elem.getAttribute !== "undefined" && elem.getAttribute("class") || "" );
});
},
"ATTR": function( name, operator, check ) {
// 处理属性选择器,如[attr=value]
return function( elem ) {
var result = Sizzle.attr( elem, name ); // 获取属性值
// 根据操作符和值判断元素是否匹配
return result == null ? operator === "!=" :
!operator ? true :
operator === "=" ? result === check :
operator === "!=" ? result !== check :
operator === "^=" ? check && result.indexOf( check ) === 0 :
operator === "*=" ? check && result.indexOf( check ) > -1 :
operator === "$=" ? check && result.slice( -check.length ) === check :
operator === "~=" ? ( " " + result.replace( rwhitespace, " " ) + " " ).indexOf( check ) > -1 :
operator === "|=" ? result === check || result.slice( 0, check.length + 1 ) === check + "-" :
false;
};
},
"CHILD": function( type, what, argument, first, last ) {
// 处理子选择器,如:nth-child(n), :first-child等
// 根据选择器的类型和参数返回一个函数,用于筛选匹配的元素
var simple = type.slice( 0, 3 ) !== "nth",
forward = type.slice( -4 ) !== "last",
ofType = what === "of-type";
return first === 1 && last === 0 ?
// 快捷方式,对于:nth-*(n)类型的选择器
function( elem ) {
return !!elem.parentNode;
} :
function( elem, context, xml ) {
// 复杂的子选择器处理逻辑
// 包括遍历DOM树、缓存优化等
var cache, uniqueCache, outerCache, node, nodeIndex, start,
dir = simple !== forward ? "nextSibling" : "previousSibling",
parent = elem.parentNode,
name = ofType && elem.nodeName.toLowerCase(),
useCache = !xml && !ofType,
diff = false;
if ( parent ) {
if ( simple ) {
// 对于:first-child, :last-child, :only-child等简单选择器
while ( dir ) {
node = elem;
while ( (node = node[ dir ]) ) {
if ( ofType ? node.nodeName.toLowerCase() === name : node.nodeType === 1 ) {
return false;
}
}
// Reverse direction for :only-* (if we haven't yet done so)
start = dir = type === "only" && !start && "nextSibling";
}
return true;
}
start = [ forward ? parent.firstChild : parent.lastChild ];
if ( forward && useCache ) {
// 使用缓存优化性能
node = parent;
outerCache = node[ expando ] || (node[ expando ] = {});
uniqueCache = outerCache[ node.uniqueID ] || (outerCache[ node.uniqueID ] = {});
cache = uniqueCache[ type ] || [];
nodeIndex = cache[ 0 ] === dirruns && cache[ 1 ];
diff = nodeIndex && cache[ 2 ];
node = nodeIndex && parent.childNodes[ nodeIndex ];
while ( (node = ++nodeIndex && node && node[ dir ] || (diff = nodeIndex = 0) || start.pop()) ) {
if ( node.nodeType === 1 && ++diff && node === elem ) {
uniqueCache[ type ] = [ dirruns, nodeIndex, diff ];
break;
}
}
} else {
// 不使用缓存时的处理逻辑
if ( useCache ) {
node = elem;
outerCache = node[ expando ] || (node[ expando ] = {});
uniqueCache = outerCache[ node.uniqueID ] || (outerCache[ node.uniqueID ] = {});
cache = uniqueCache[ type ] || [];
nodeIndex = cache[ 0 ] === dirruns && cache[ 1 ];
diff = nodeIndex;
}
// 遍历DOM树,查找匹配的元素
}
}
return false; // 如果没有找到匹配的元素,则返回false
};
}
}
};
// xml :nth-child(...)
// or :nth-last-child(...) or :nth(-last)?-of-type(...)
// 定义一个对象,包含处理不同类型选择器的函数
var someSelectorEngine = {
// 处理位置伪类(如:first, :last等)和nth-类型的选择器
"POSITIONAL": function( pseudo, argument ) {
// 省略具体实现细节,但基本逻辑是根据位置选择元素
// 使用一个while循环来遍历元素,根据条件匹配元素
// 如果找到匹配的元素,则根据条件(如是否使用缓存)执行相应操作
// 省略的代码包含:
// - 遍历DOM树寻找元素
// - 检查元素是否符合特定条件(如节点类型、节点名等)
// - 缓存匹配结果以优化性能
// - 检查是否找到了目标元素(elem)
// 最后,根据循环的偏移量和初始值判断是否符合特定的位置条件
diff -= last;
return diff === first || ( diff % first === 0 && diff / first >= 0 );
},
// 处理伪类选择器(如:not, :has, :contains, :lang等)
"PSEUDO": function( pseudo, argument ) {
// 伪类名是不区分大小写的
// 根据伪类的名称从Expr.pseudos或Expr.setFilters中查找对应的处理函数
// 如果找不到,则抛出错误
var args,
fn = Expr.pseudos[ pseudo ] || Expr.setFilters[ pseudo.toLowerCase() ] ||
Sizzle.error( "unsupported pseudo: " + pseudo );
// 如果处理函数有expando属性,表示需要额外的参数来创建过滤器函数
if ( fn[ expando ] ) {
return fn( argument );
}
// 支持老式的函数签名,即参数长度大于1的情况
if ( fn.length > 1 ) {
args = [ pseudo, pseudo, "", argument ];
// 根据是否存在对应的低级伪类,返回不同的处理函数
return Expr.setFilters.hasOwnProperty( pseudo.toLowerCase() ) ?
markFunction(function( seed, matches ) {
// 省略的实现:对种子集合中的元素应用过滤器,并更新匹配结果
}) :
function( elem ) {
// 直接对单个元素应用过滤器
return fn( elem, 0, args );
};
}
// 对于简单的伪类,直接返回处理函数
return fn;
},
pseudos: {
// 处理:not伪类
"not": markFunction(function( selector ) {
// 编译选择器,并返回一个函数,该函数接受一个元素集合
// 并返回不被selector匹配的元素的集合
var input = [],
results = [],
matcher = compile( selector.replace( rtrim, "$1" ) );
return matcher[ expando ] ?
// 如果matcher有expando属性,表示它是复杂的,需要特殊处理
markFunction(function( seed, matches, context, xml ) {
// 省略的实现:对种子集合中的元素应用matcher,并更新匹配结果
}) :
// 对于简单的matcher,直接返回一个函数
function( elem, context, xml ) {
input[0] = elem;
matcher( input, null, xml, results );
input[0] = null; // 避免内存泄漏
return !results.pop(); // 返回是否未匹配到任何元素
};
}),
// 处理:has伪类
"has": markFunction(function( selector ) {
return function( elem ) {
// 检查elem是否有后代元素匹配给定的选择器
return Sizzle( selector, elem ).length > 0;
};
}),
// 处理:contains伪类
"contains": markFunction(function( text ) {
text = text.replace( runescape, funescape ); // 转义特殊字符
return function( elem ) {
// 检查elem的文本内容是否包含指定的文本
return ( elem.textContent || elem.innerText || getText( elem ) ).indexOf( text ) > -1;
};
}),
// 处理:lang伪类
"lang": markFunction( function( lang ) {
// 验证lang参数是否有效
if ( !ridentifier.test(lang || "") ) {
Sizzle.error( "unsupported lang: " + lang );
}
lang = lang.replace( runescape, funescape ).toLowerCase();
return function( elem ) {
var elemLang;
do {
// 获取元素的lang属性(考虑HTML和XML文档的差异)
if ( (elemLang = documentIsHTML ?
elem.lang :
elem.getAttribute("xml:lang") || elem.getAttribute("lang")) ) {
elemLang = elemLang.toLowerCase();
// 检查元素的lang是否等于指定的lang,或以指定的lang开头并后跟"-"
return elemLang === lang || elemLang.indexOf( lang + "-" ) === 0;
}
} while ( (elem = elem.parentNode) && elem.nodeType === 1 );
return false; // 未找到匹配的lang
};
}),
// 省略其他伪类的实现...
};
// Miscellaneous
// 定义一个对象Expr,其中包含多个函数用于选择和过滤DOM元素
var Expr = {
// 检查元素是否匹配当前的URL哈希值
"target": function( elem ) {
var hash = window.location && window.location.hash; // 获取当前URL的哈希部分
return hash && hash.slice( 1 ) === elem.id; // 检查哈希值(去掉'#')是否与元素的ID匹配
},
// 检查元素是否为文档的根元素
"root": function( elem ) {
return elem === docElem; // docElem应该是文档的根元素(如document.documentElement)
},
// 检查元素是否是当前文档中获得焦点的元素
"focus": function( elem ) {
// 检查元素是否是当前获得焦点的元素,并且文档具有焦点(考虑document.hasFocus的兼容性)
return elem === document.activeElement && (!document.hasFocus || document.hasFocus()) && !!(elem.type || elem.href || ~elem.tabIndex);
},
// 布尔属性检查函数
"enabled": function( elem ) {
return elem.disabled === false; // 检查元素是否未被禁用
},
"disabled": function( elem ) {
return elem.disabled === true; // 检查元素是否被禁用
},
// 检查元素是否被选中(适用于input和option元素)
"checked": function( elem ) {
var nodeName = elem.nodeName.toLowerCase(); // 获取元素名称的小写形式
return (nodeName === "input" && !!elem.checked) || (nodeName === "option" && !!elem.selected); // 检查input是否被勾选,或option是否被选中
},
// 检查option元素是否被选中(触发对默认选中的处理)
"selected": function( elem ) {
if ( elem.parentNode ) {
elem.parentNode.selectedIndex; // 访问parentNode的selectedIndex属性以触发Safari对默认选中的处理
}
return elem.selected === true; // 检查元素是否被选中
},
// 内容检查函数
"empty": function( elem ) {
// 检查元素是否不包含任何子节点(文本节点、注释等除外)
for ( elem = elem.firstChild; elem; elem = elem.nextSibling ) {
if ( elem.nodeType < 6 ) { // nodeType < 6 表示是元素节点、文本节点、CDATA节点等
return false;
}
}
return true; // 如果元素不包含任何相关内容,则返回true
},
// 检查元素是否不是空的(即包含子节点)
"parent": function( elem ) {
return !Expr.pseudos["empty"]( elem ); // 使用empty伪类检查元素是否为空
},
// 元素/输入类型检查函数
"header": function( elem ) {
return rheader.test( elem.nodeName ); // 使用正则表达式检查元素名称是否为header类型(如h1-h6)
},
"input": function( elem ) {
return rinputs.test( elem.nodeName ); // 使用正则表达式检查元素是否为input类型
},
"button": function( elem ) {
var name = elem.nodeName.toLowerCase(); // 获取元素名称的小写形式
return name === "input" && elem.type === "button" || name === "button"; // 检查元素是否为type="button"的input或button元素
},
"text": function( elem ) {
var attr;
return elem.nodeName.toLowerCase() === "input" &&
elem.type === "text" &&
// 支持IE<8,因为新HTML5属性值(如"search")在IE中可能仍然被视为"text"类型
( (attr = elem.getAttribute("type")) == null || attr.toLowerCase() === "text" );
},
// 位置在集合中的检查函数
// 以下函数创建位置伪类,用于匹配集合中的特定位置元素
"first": createPositionalPseudo(function() {
return [ 0 ]; // 返回包含第一个元素索引的数组
}),
"last": createPositionalPseudo(function( matchIndexes, length ) {
return [ length - 1 ]; // 返回包含最后一个元素索引的数组
}),
"eq": createPositionalPseudo(function( matchIndexes, length, argument ) {
return [ argument < 0 ? argument + length : argument ]; // 根据给定的索引返回对应的元素索引数组
}),
"even": createPositionalPseudo(function( matchIndexes, length ) {
var i = 0;
for ( ; i < length; i += 2 ) {
matchIndexes.push( i ); // 将偶数索引添加到数组中
}
return matchIndexes; // 返回包含偶数索引的数组
}),
"odd": createPositionalPseudo(function( matchIndexes, length ) {
var i = 1;
for ( ; i < length; i += 2 ) {
matchIndexes.push( i ); // 将奇数索引添加到数组中
}
return matchIndexes; // 返回包含奇数索引的数组
}),
"lt": createPositionalPseudo(function( matchIndexes, length, argument ) {
var i = argument < 0 ? argument + length : argument;
for ( ; --i >= 0; ) {
matchIndexes.push( i ); // 将小于给定索引的所有索引添加到数组中
}
return matchIndexes; // 返回包含所有小于给定索引的数组
}),
"gt": createPositionalPseudo(function( matchIndexes, length, argument ) {
var i = argument < 0 ? argument + length : argument;
for ( ; ++i < length; ) {
matchIndexes.push( i ); // 将大于给定索引的所有索引添加到数组中
}
return matchIndexes; // 返回包含所有大于给定索引的数组
})
};
// 将nth伪类映射为eq伪类
Expr.pseudos["nth"] = Expr.pseudos["eq"];
// 为按钮和输入类型添加伪类
for ( var i in { radio: true, checkbox: true, file: true, password: true, image: true } ) {
Expr.pseudos[ i ] = createInputPseudo( i ); // 为每种输入类型创建伪类
}
for ( i in { submit: true, reset: true } ) {
Expr.pseudos[ i ] = createButtonPseudo( i ); // 为每种按钮类型创建伪类
}
// 创建一个易于使用的API来创建新的setFilters
function setFilters() {}
setFilters.prototype = Expr.filters = Expr.pseudos; // 将setFilters的原型设置为Expr的filters和pseudos
Expr.setFilters = new setFilters(); // 创建一个setFilters的实例
// 定义一个tokenize函数,用于将选择器字符串解析为令牌数组
tokenize = Sizzle.tokenize = function( selector, parseOnly ) {
var matched, match, tokens, type,
soFar, groups, preFilters,
cached = tokenCache[ selector + " " ]; // 尝试从缓存中获取已解析的令牌
if ( cached ) {
return parseOnly ? 0 : cached.slice( 0 ); // 如果缓存命中,则直接返回令牌数组(或0,如果只需要解析)
}
soFar = selector; // 当前要解析的选择器字符串
groups = []; // 存储解析后的令牌组的数组
preFilters = Expr.preFilter; // 预过滤器,用于在解析前处理选择器
while ( soFar ) {
// 处理逗号分隔的选择器组
if ( !matched || (match = rcomma.exec( soFar )) ) {
if ( match ) {
soFar = soFar.slice( match[0].length ) || soFar; // 移除已匹配的逗号部分
}
groups.push( (tokens = []) ); // 为新的选择器组创建一个令牌数组
}
matched = false; // 重置匹配标志
// 处理组合器(如后代选择器、子选择器)
if ( (match = rcombinators.exec( soFar )) ) {
matched = match.shift(); // 获取匹配的组合器
tokens.push({
value: matched,
// 将后代组合器转换为空格(因为后代组合器在后续处理中作为空格处理)
type: match[0].replace( rtrim, " " )
});
soFar = soFar.slice( matched.length ); // 移除已匹配的组合器部分
}
// 处理过滤器(如类选择器、属性选择器)
for ( type in Expr.filter ) {
if ( (match = matchExpr[ type ].exec( soFar )) && (!preFilters[ type ] ||
(match = preFilters[ type ]( match ))) ) {
matched = match.shift(); // 获取匹配的过滤器值
tokens.push({
value: matched,
// 定义一个函数,用于检查元素是否匹配特定条件(考虑其所有祖先或前置元素)
function( elem, context, xml ) {
// 初始化变量
var oldCache, uniqueCache, outerCache, // 用于缓存的变量
newCache = [ dirruns, doneName ]; // 新缓存,包含两个元素:dirruns(运行次数)和doneName(完成名称),用于结果回传
// 如果处理的是XML节点,则不能使用任意数据缓存,因为XML节点不支持这种操作
if ( xml ) {
// 遍历元素的所有祖先或前置元素(取决于dir的值)
while ( (elem = elem[ dir ]) ) {
// 检查元素是否为元素节点(nodeType === 1),或者是否允许检查非元素节点(checkNonElements为真)
if ( elem.nodeType === 1 || checkNonElements ) {
// 使用matcher函数检查元素是否匹配条件
if ( matcher( elem, context, xml ) ) {
// 如果匹配,则返回true
return true;
}
}
}
} else {
// 对于非XML节点,可以使用缓存来优化性能
while ( (elem = elem[ dir ]) ) {
// 同样检查元素是否为元素节点,或者是否允许检查非元素节点
if ( elem.nodeType === 1 || checkNonElements ) {
// 获取或创建元素的外层缓存对象
outerCache = elem[ expando ] || (elem[ expando ] = {});
// 对于IE <9,需要特别处理以防止克隆属性导致的问题
// 使用元素的uniqueID作为键,获取或创建唯一的缓存对象
uniqueCache = outerCache[ elem.uniqueID ] || (outerCache[ elem.uniqueID ] = {});
// 检查是否存在旧的缓存,并且缓存是否仍然有效(即dirruns和doneName是否匹配)
if ( (oldCache = uniqueCache[ dir ]) &&
oldCache[ 0 ] === dirruns && oldCache[ 1 ] === doneName ) {
// 如果缓存有效,则使用缓存的结果(匹配或不匹配)
// 并将其赋值给newCache[2],以便结果可以回传给之前的元素
return (newCache[ 2 ] = oldCache[ 2 ]);
} else {
// 如果缓存无效或不存在,则创建新的缓存条目
uniqueCache[ dir ] = newCache;
// 使用matcher函数检查元素是否匹配条件,并将结果存储在newCache[2]中
if ( (newCache[ 2 ] = matcher( elem, context, xml )) ) {
// 如果匹配,则返回true
return true;
}
}
}
}
}
// 如果没有找到匹配的元素,则函数最终不会返回true(隐式返回undefined或false)
};
// 注意:此代码段中有几个未定义的变量和函数,如dirruns、doneName、dir、expando、checkNonElements和matcher。
// 这些变量和函数应该在代码的其他部分中定义。dirruns和doneName通常用于缓存机制中,以确保缓存的有效性。
// dir是一个表示遍历方向的变量(例如,'parentNode'表示向上遍历祖先节点)。
// expando是一个用于在元素上存储额外数据的属性名。
// checkNonElements是一个布尔值,用于指示是否应该检查非元素节点。
// matcher是一个函数,用于根据给定的上下文和XML标志来判断元素是否匹配特定的条件。
"parent": function( elem ) {
return !Expr.pseudos["empty"]( elem );
},
// Element/input types
"header": function( elem ) {
return rheader.test( elem.nodeName );
},
"input": function( elem ) {
return rinputs.test( elem.nodeName );
},
"button": function( elem ) {
var name = elem.nodeName.toLowerCase();
return name === "input" && elem.type === "button" || name === "button";
},
"text": function( elem ) {
var attr;
return elem.nodeName.toLowerCase() === "input" &&
elem.type === "text" &&
// Support: IE<8
// New HTML5 attribute values (e.g., "search") appear with elem.type === "text"
( (attr = elem.getAttribute("type")) == null || attr.toLowerCase() === "text" );
},
// Position-in-collection
"first": createPositionalPseudo(function() {
return [ 0 ];
}),
"last": createPositionalPseudo(function( matchIndexes, length ) {
return [ length - 1 ];
}),
"eq": createPositionalPseudo(function( matchIndexes, length, argument ) {
return [ argument < 0 ? argument + length : argument ];
}),
"even": createPositionalPseudo(function( matchIndexes, length ) {
var i = 0;
for ( ; i < length; i += 2 ) {
matchIndexes.push( i );
}
return matchIndexes;
}),
"odd": createPositionalPseudo(function( matchIndexes, length ) {
var i = 1;
for ( ; i < length; i += 2 ) {
matchIndexes.push( i );
}
return matchIndexes;
}),
"lt": createPositionalPseudo(function( matchIndexes, length, argument ) {
var i = argument < 0 ? argument + length : argument;
for ( ; --i >= 0; ) {
matchIndexes.push( i );
}
return matchIndexes;
}),
"gt": createPositionalPseudo(function( matchIndexes, length, argument ) {
var i = argument < 0 ? argument + length : argument;
for ( ; ++i < length; ) {
matchIndexes.push( i );
}
return matchIndexes;
})
}
};
Expr.pseudos["nth"] = Expr.pseudos["eq"];
// Add button/input type pseudos
for ( i in { radio: true, checkbox: true, file: true, password: true, image: true } ) {
Expr.pseudos[ i ] = createInputPseudo( i );
}
for ( i in { submit: true, reset: true } ) {
Expr.pseudos[ i ] = createButtonPseudo( i );
}
// Easy API for creating new setFilters
function setFilters() {}
setFilters.prototype = Expr.filters = Expr.pseudos;
Expr.setFilters = new setFilters();
tokenize = Sizzle.tokenize = function( selector, parseOnly ) {
var matched, match, tokens, type,
soFar, groups, preFilters,
cached = tokenCache[ selector + " " ];
if ( cached ) {
return parseOnly ? 0 : cached.slice( 0 );
}
soFar = selector;
groups = [];
preFilters = Expr.preFilter;
while ( soFar ) {
// Comma and first run
if ( !matched || (match = rcomma.exec( soFar )) ) {
if ( match ) {
// Don't consume trailing commas as valid
soFar = soFar.slice( match[0].length ) || soFar;
}
groups.push( (tokens = []) );
}
matched = false;
// Combinators
if ( (match = rcombinators.exec( soFar )) ) {
matched = match.shift();
tokens.push({
value: matched,
// Cast descendant combinators to space
type: match[0].replace( rtrim, " " )
});
soFar = soFar.slice( matched.length );
}
// Filters
for ( type in Expr.filter ) {
if ( (match = matchExpr[ type ].exec( soFar )) && (!preFilters[ type ] ||
(match = preFilters[ type ]( match ))) ) {
matched = match.shift();
tokens.push({
value: matched,
type: type,
matches: match
});
soFar = soFar.slice( matched.length );
}
}
if ( !matched ) {
break;
}
}
// Return the length of the invalid excess
// if we're just parsing
// Otherwise, throw an error or return tokens
return parseOnly ?
soFar.length :
soFar ?
Sizzle.error( selector ) :
// Cache the tokens
tokenCache( selector, groups ).slice( 0 );
};
function toSelector( tokens ) {
var i = 0,
len = tokens.length,
selector = "";
for ( ; i < len; i++ ) {
selector += tokens[i].value;
}
return selector;
}
function addCombinator( matcher, combinator, base ) {
var dir = combinator.dir,
checkNonElements = base && dir === "parentNode",
doneName = done++;
return combinator.first ?
// Check against closest ancestor/preceding element
function( elem, context, xml ) {
while ( (elem = elem[ dir ]) ) {
if ( elem.nodeType === 1 || checkNonElements ) {
return matcher( elem, context, xml );
}
}
} :
// Check against all ancestor/preceding elements
function( elem, context, xml ) {
var oldCache, uniqueCache, outerCache,
newCache = [ dirruns, doneName ];
// We can't set arbitrary data on XML nodes, so they don't benefit from combinator caching
if ( xml ) {
while ( (elem = elem[ dir ]) ) {
if ( elem.nodeType === 1 || checkNonElements ) {
if ( matcher( elem, context, xml ) ) {
return true;
}
}
}
} else {
while ( (elem = elem[ dir ]) ) {
if ( elem.nodeType === 1 || checkNonElements ) {
outerCache = elem[ expando ] || (elem[ expando ] = {});
// Support: IE <9 only
// Defend against cloned attroperties (jQuery gh-1709)
uniqueCache = outerCache[ elem.uniqueID ] || (outerCache[ elem.uniqueID ] = {});
if ( (oldCache = uniqueCache[ dir ]) &&
oldCache[ 0 ] === dirruns && oldCache[ 1 ] === doneName ) {
// Assign to newCache so results back-propagate to previous elements
return (newCache[ 2 ] = oldCache[ 2 ]);
} else {
// Reuse newcache so results back-propagate to previous elements
uniqueCache[ dir ] = newCache;
// A match means we're done; a fail means we have to keep checking
if ( (newCache[ 2 ] = matcher( elem, context, xml )) ) {
return true;
}
}
}
}
}
};
}
function elementMatcher( matchers ) {
return matchers.length > 1 ?
function( elem, context, xml ) {
var i = matchers.length;
while ( i-- ) {
if ( !matchers[i]( elem, context, xml ) ) {
return false;
}
}
return true;
} :
matchers[0];
}
function multipleContexts( selector, contexts, results ) {
var i = 0,
len = contexts.length;
for ( ; i < len; i++ ) {
Sizzle( selector, contexts[i], results );
}
return results;
}
function condense( unmatched, map, filter, context, xml ) {
var elem,
newUnmatched = [],
i = 0,
len = unmatched.length,
mapped = map != null;
for ( ; i < len; i++ ) {
if ( (elem = unmatched[i]) ) {
if ( !filter || filter( elem, context, xml ) ) {
newUnmatched.push( elem );
if ( mapped ) {
map.push( i );
}
}
}
}
return newUnmatched;
}
function setMatcher( preFilter, selector, matcher, postFilter, postFinder, postSelector ) {
if ( postFilter && !postFilter[ expando ] ) {
postFilter = setMatcher( postFilter );
}
if ( postFinder && !postFinder[ expando ] ) {
postFinder = setMatcher( postFinder, postSelector );
}
return markFunction(function( seed, results, context, xml ) {
var temp, i, elem,
preMap = [],
postMap = [],
preexisting = results.length,
// Get initial elements from seed or context
elems = seed || multipleContexts( selector || "*", context.nodeType ? [ context ] : context, [] ),
// Prefilter to get matcher input, preserving a map for seed-results synchronization
matcherIn = preFilter && ( seed || !selector ) ?
condense( elems, preMap, preFilter, context, xml ) :
elems,
matcherOut = matcher ?
// If we have a postFinder, or filtered seed, or non-seed postFilter or preexisting results,
postFinder || ( seed ? preFilter : preexisting || postFilter ) ?
// ...intermediate processing is necessary
[] :
// ...otherwise use results directly
results :
matcherIn;
// Find primary matches
if ( matcher ) {
matcher( matcherIn, matcherOut, context, xml );
}
// Apply postFilter
if ( postFilter ) {
temp = condense( matcherOut, postMap );
postFilter( temp, [], context, xml );
// Un-match failing elements by moving them back to matcherIn
i = temp.length;
while ( i-- ) {
if ( (elem = temp[i]) ) {
matcherOut[ postMap[i] ] = !(matcherIn[ postMap[i] ] = elem);
}
}
}
if ( seed ) {
if ( postFinder || preFilter ) {
if ( postFinder ) {
// Get the final matcherOut by condensing this intermediate into postFinder contexts
temp = [];
i = matcherOut.length;
while ( i-- ) {
if ( (elem = matcherOut[i]) ) {
// Restore matcherIn since elem is not yet a final match
temp.push( (matcherIn[i] = elem) );
}
}
postFinder( null, (matcherOut = []), temp, xml );
}
// Move matched elements from seed to results to keep them synchronized
i = matcherOut.length;
while ( i-- ) {
if ( (elem = matcherOut[i]) &&
(temp = postFinder ? indexOf( seed, elem ) : preMap[i]) > -1 ) {
seed[temp] = !(results[temp] = elem);
}
}
}
// Add elements to results, through postFinder if defined
} else {
matcherOut = condense(
matcherOut === results ?
matcherOut.splice( preexisting, matcherOut.length ) :
matcherOut
);
if ( postFinder ) {
postFinder( null, results, matcherOut, xml );
} else {
push.apply( results, matcherOut );
}
}
});
}
function matcherFromTokens( tokens ) {
var checkContext, matcher, j,
len = tokens.length,
leadingRelative = Expr.relative[ tokens[0].type ],
implicitRelative = leadingRelative || Expr.relative[" "],
i = leadingRelative ? 1 : 0,
// The foundational matcher ensures that elements are reachable from top-level context(s)
matchContext = addCombinator( function( elem ) {
return elem === checkContext;
}, implicitRelative, true ),
matchAnyContext = addCombinator( function( elem ) {
return indexOf( checkContext, elem ) > -1;
}, implicitRelative, true ),
matchers = [ function( elem, context, xml ) {
var ret = ( !leadingRelative && ( xml || context !== outermostContext ) ) || (
(checkContext = context).nodeType ?
matchContext( elem, context, xml ) :
matchAnyContext( elem, context, xml ) );
// Avoid hanging onto element (issue #299)
checkContext = null;
return ret;
} ];
for ( ; i < len; i++ ) {
if ( (matcher = Expr.relative[ tokens[i].type ]) ) {
matchers = [ addCombinator(elementMatcher( matchers ), matcher) ];
} else {
matcher = Expr.filter[ tokens[i].type ].apply( null, tokens[i].matches );
// Return special upon seeing a positional matcher
if ( matcher[ expando ] ) {
// Find the next relative operator (if any) for proper handling
j = ++i;
for ( ; j < len; j++ ) {
if ( Expr.relative[ tokens[j].type ] ) {
break;
}
}
return setMatcher(
i > 1 && elementMatcher( matchers ),
i > 1 && toSelector(
// If the preceding token was a descendant combinator, insert an implicit any-element `*`
tokens.slice( 0, i - 1 ).concat({ value: tokens[ i - 2 ].type === " " ? "*" : "" })
).replace( rtrim, "$1" ),
matcher,
i < j && matcherFromTokens( tokens.slice( i, j ) ),
j < len && matcherFromTokens( (tokens = tokens.slice( j )) ),
j < len && toSelector( tokens )
);
}
matchers.push( matcher );
}
}
return elementMatcher( matchers );
}
function matcherFromGroupMatchers( elementMatchers, setMatchers ) {
var bySet = setMatchers.length > 0,
byElement = elementMatchers.length > 0,
superMatcher = function( seed, context, xml, results, outermost ) {
var elem, j, matcher,
matchedCount = 0,
i = "0",
unmatched = seed && [],
setMatched = [],
contextBackup = outermostContext,
// We must always have either seed elements or outermost context
elems = seed || byElement && Expr.find["TAG"]( "*", outermost ),
// Use integer dirruns iff this is the outermost matcher
dirrunsUnique = (dirruns += contextBackup == null ? 1 : Math.random() || 0.1),
len = elems.length;
if ( outermost ) {
outermostContext = context === document || context || outermost;
}
// Add elements passing elementMatchers directly to results
// Support: IE<9, Safari
// Tolerate NodeList properties (IE: "length"; Safari: ) matching elements by id
for ( ; i !== len && (elem = elems[i]) != null; i++ ) {
if ( byElement && elem ) {
j = 0;
if ( !context && elem.ownerDocument !== document ) {
setDocument( elem );
xml = !documentIsHTML;
}
while ( (matcher = elementMatchers[j++]) ) {
if ( matcher( elem, context || document, xml) ) {
results.push( elem );
break;
}
}
if ( outermost ) {
dirruns = dirrunsUnique;
}
}
// Track unmatched elements for set filters
if ( bySet ) {
// They will have gone through all possible matchers
if ( (elem = !matcher && elem) ) {
matchedCount--;
}
// Lengthen the array for every element, matched or not
if ( seed ) {
unmatched.push( elem );
}
}
}
// `i` is now the count of elements visited above, and adding it to `matchedCount`
// makes the latter nonnegative.
matchedCount += i;
// Apply set filters to unmatched elements
// NOTE: This can be skipped if there are no unmatched elements (i.e., `matchedCount`
// equals `i`), unless we didn't visit _any_ elements in the above loop because we have
// no element matchers and no seed.
// Incrementing an initially-string "0" `i` allows `i` to remain a string only in that
// case, which will result in a "00" `matchedCount` that differs from `i` but is also
// numerically zero.
if ( bySet && i !== matchedCount ) {
j = 0;
while ( (matcher = setMatchers[j++]) ) {
matcher( unmatched, setMatched, context, xml );
}
if ( seed ) {
// Reintegrate element matches to eliminate the need for sorting
if ( matchedCount > 0 ) {
while ( i-- ) {
if ( !(unmatched[i] || setMatched[i]) ) {
setMatched[i] = pop.call( results );
}
}
}
// Discard index placeholder values to get only actual matches
setMatched = condense( setMatched );
}
// Add matches to results
push.apply( results, setMatched );
// Seedless set matches succeeding multiple successful matchers stipulate sorting
if ( outermost && !seed && setMatched.length > 0 &&
( matchedCount + setMatchers.length ) > 1 ) {
Sizzle.uniqueSort( results );
}
}
// Override manipulation of globals by nested matchers
if ( outermost ) {
dirruns = dirrunsUnique;
outermostContext = contextBackup;
}
return unmatched;
};
return bySet ?
markFunction( superMatcher ) :
superMatcher;
}
compile = Sizzle.compile = function( selector, match /* Internal Use Only */ ) {
var i,
setMatchers = [],
elementMatchers = [],
cached = compilerCache[ selector + " " ];
if ( !cached ) {
// Generate a function of recursive functions that can be used to check each element
if ( !match ) {
match = tokenize( selector );
}
i = match.length;
while ( i-- ) {
cached = matcherFromTokens( match[i] );
if ( cached[ expando ] ) {
setMatchers.push( cached );
} else {
elementMatchers.push( cached );
}
}
// Cache the compiled function
cached = compilerCache( selector, matcherFromGroupMatchers( elementMatchers, setMatchers ) );
// Save selector and tokenization
cached.selector = selector;
}
return cached;
};
/**
* A low-level selection function that works with Sizzle's compiled
* selector functions
* @param {String|Function} selector A selector or a pre-compiled
* selector function built with Sizzle.compile
* @param {Element} context
* @param {Array} [results]
* @param {Array} [seed] A set of elements to match against
*/
select = Sizzle.select = function( selector, context, results, seed ) {
var i, tokens, token, type, find,
compiled = typeof selector === "function" && selector,
match = !seed && tokenize( (selector = compiled.selector || selector) );
results = results || [];
// Try to minimize operations if there is only one selector in the list and no seed
// (the latter of which guarantees us context)
if ( match.length === 1 ) {
// Reduce context if the leading compound selector is an ID
tokens = match[0] = match[0].slice( 0 );
if ( tokens.length > 2 && (token = tokens[0]).type === "ID" &&
support.getById && context.nodeType === 9 && documentIsHTML &&
Expr.relative[ tokens[1].type ] ) {
context = ( Expr.find["ID"]( token.matches[0].replace(runescape, funescape), context ) || [] )[0];
if ( !context ) {
return results;
// Precompiled matchers will still verify ancestry, so step up a level
} else if ( compiled ) {
context = context.parentNode;
}
selector = selector.slice( tokens.shift().value.length );
}
// Fetch a seed set for right-to-left matching
i = matchExpr["needsContext"].test( selector ) ? 0 : tokens.length;
while ( i-- ) {
token = tokens[i];
// Abort if we hit a combinator
if ( Expr.relative[ (type = token.type) ] ) {
break;
}
if ( (find = Expr.find[ type ]) ) {
// Search, expanding context for leading sibling combinators
if ( (seed = find(
token.matches[0].replace( runescape, funescape ),
rsibling.test( tokens[0].type ) && testContext( context.parentNode ) || context
)) ) {
// If seed is empty or no tokens remain, we can return early
tokens.splice( i, 1 );
selector = seed.length && toSelector( tokens );
if ( !selector ) {
push.apply( results, seed );
return results;
}
break;
}
}
}
}
// Compile and execute a filtering function if one is not provided
// Provide `match` to avoid retokenization if we modified the selector above
( compiled || compile( selector, match ) )(
seed,
context,
!documentIsHTML,
results,
!context || rsibling.test( selector ) && testContext( context.parentNode ) || context
);
return results;
};
// One-time assignments
// Sort stability
support.sortStable = expando.split("").sort( sortOrder ).join("") === expando;
// Support: Chrome 14-35+
// Always assume duplicates if they aren't passed to the comparison function
support.detectDuplicates = !!hasDuplicate;
// Initialize against the default document
setDocument();
// Support: Webkit<537.32 - Safari 6.0.3/Chrome 25 (fixed in Chrome 27)
// Detached nodes confoundingly follow *each other*
support.sortDetached = assert(function( div1 ) {
// Should return 1, but returns 4 (following)
return div1.compareDocumentPosition( document.createElement("div") ) & 1;
});
// Support: IE<8
// Prevent attribute/property "interpolation"
// http://msdn.microsoft.com/en-us/library/ms536429%28VS.85%29.aspx
if ( !assert(function( div ) {
div.innerHTML = "";
return div.firstChild.getAttribute("href") === "#" ;
}) ) {
addHandle( "type|href|height|width", function( elem, name, isXML ) {
if ( !isXML ) {
return elem.getAttribute( name, name.toLowerCase() === "type" ? 1 : 2 );
}
});
}
// Support: IE<9
// Use defaultValue in place of getAttribute("value")
if ( !support.attributes || !assert(function( div ) {
div.innerHTML = "";
div.firstChild.setAttribute( "value", "" );
return div.firstChild.getAttribute( "value" ) === "";
}) ) {
addHandle( "value", function( elem, name, isXML ) {
if ( !isXML && elem.nodeName.toLowerCase() === "input" ) {
return elem.defaultValue;
}
});
}
// Support: IE<9
// Use getAttributeNode to fetch booleans when getAttribute lies
if ( !assert(function( div ) {
return div.getAttribute("disabled") == null;
}) ) {
addHandle( booleans, function( elem, name, isXML ) {
var val;
if ( !isXML ) {
return elem[ name ] === true ? name.toLowerCase() :
(val = elem.getAttributeNode( name )) && val.specified ?
val.value :
null;
}
});
}
return Sizzle;
})( window );
jQuery.find = Sizzle;
jQuery.expr = Sizzle.selectors;
jQuery.expr[ ":" ] = jQuery.expr.pseudos;
jQuery.uniqueSort = jQuery.unique = Sizzle.uniqueSort;
jQuery.text = Sizzle.getText;
jQuery.isXMLDoc = Sizzle.isXML;
jQuery.contains = Sizzle.contains;
var 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;
};
var siblings = function( n, elem ) {
var matched = [];
for ( ; n; n = n.nextSibling ) {
if ( n.nodeType === 1 && n !== elem ) {
matched.push( n );
}
}
return matched;
};
var rneedsContext = jQuery.expr.match.needsContext;
var rsingleTag = ( /^<([\w-]+)\s*\/?>(?:<\/\1>|)$/ );
var risSimple = /^.[^:#\[\.,]*$/;
// Implement the identical functionality for filter and not
function winnow( elements, qualifier, not ) {
if ( jQuery.isFunction( qualifier ) ) {
return jQuery.grep( elements, function( elem, i ) {
/* jshint -W018 */
return !!qualifier.call( elem, i, elem ) !== not;
} );
}
if ( qualifier.nodeType ) {
return jQuery.grep( elements, function( elem ) {
return ( elem === qualifier ) !== not;
} );
}
if ( typeof qualifier === "string" ) {
if ( risSimple.test( qualifier ) ) {
return jQuery.filter( qualifier, elements, not );
}
qualifier = jQuery.filter( qualifier, elements );
}
return jQuery.grep( elements, function( elem ) {
return ( jQuery.inArray( elem, qualifier ) > -1 ) !== not;
} );
}
jQuery.filter = function( expr, elems, not ) {
var elem = elems[ 0 ];
if ( not ) {
expr = ":not(" + expr + ")";
}
return elems.length === 1 && elem.nodeType === 1 ?
jQuery.find.matchesSelector( elem, expr ) ? [ elem ] : [] :
jQuery.find.matches( expr, jQuery.grep( elems, function( elem ) {
return elem.nodeType === 1;
} ) );
};
jQuery.fn.extend( {
find: function( selector ) {
var i,
ret = [],
self = this,
len = self.length;
if ( typeof selector !== "string" ) {
return this.pushStack( jQuery( selector ).filter( function() {
for ( i = 0; i < len; i++ ) {
if ( jQuery.contains( self[ i ], this ) ) {
return true;
}
}
} ) );
}
for ( i = 0; i < len; i++ ) {
jQuery.find( selector, self[ i ], ret );
}
// Needed because $( selector, context ) becomes $( context ).find( selector )
ret = this.pushStack( len > 1 ? jQuery.unique( ret ) : ret );
ret.selector = this.selector ? this.selector + " " + selector : selector;
return ret;
},
filter: function( selector ) {
return this.pushStack( winnow( this, selector || [], false ) );
},
not: function( selector ) {
return this.pushStack( winnow( this, selector || [], true ) );
},
is: function( selector ) {
return !!winnow(
this,
// If this is a positional/relative selector, check membership in the returned set
// so $("p:first").is("p:last") won't return true for a doc with two "p".
typeof selector === "string" && rneedsContext.test( selector ) ?
jQuery( selector ) :
selector || [],
false
).length;
}
} );
// Initialize a jQuery object
// A central reference to the root jQuery(document)
var rootjQuery,
// A simple way to check for HTML strings
// Prioritize #id over to avoid XSS via location.hash (#9521)
// Strict HTML recognition (#11290: must start with <)
rquickExpr = /^(?:\s*(<[\w\W]+>)[^>]*|#([\w-]*))$/,
init = jQuery.fn.init = function( selector, context, root ) {
var match, elem;
// HANDLE: $(""), $(null), $(undefined), $(false)
if ( !selector ) {
return this;
}
// init accepts an alternate rootjQuery
// so migrate can support jQuery.sub (gh-2101)
root = root || rootjQuery;
// Handle HTML strings
if ( typeof selector === "string" ) {
if ( selector.charAt( 0 ) === "<" &&
selector.charAt( selector.length - 1 ) === ">" &&
selector.length >= 3 ) {
// Assume that strings that start and end with <> are HTML and skip the regex check
match = [ null, selector, null ];
} else {
match = rquickExpr.exec( selector );
}
// Match html or make sure no context is specified for #id
if ( match && ( match[ 1 ] || !context ) ) {
// HANDLE: $(html) -> $(array)
if ( match[ 1 ] ) {
context = context instanceof jQuery ? context[ 0 ] : context;
// scripts is true for back-compat
// Intentionally let the error be thrown if parseHTML is not present
jQuery.merge( this, jQuery.parseHTML(
match[ 1 ],
context && context.nodeType ? context.ownerDocument || context : document,
true
) );
// HANDLE: $(html, props)
if ( rsingleTag.test( match[ 1 ] ) && jQuery.isPlainObject( context ) ) {
for ( match in context ) {
// Properties of context are called as methods if possible
if ( jQuery.isFunction( this[ match ] ) ) {
this[ match ]( context[ match ] );
// ...and otherwise set as attributes
} else {
this.attr( match, context[ match ] );
}
}
}
return this;
// HANDLE: $(#id)
} else {
elem = document.getElementById( match[ 2 ] );
// Check parentNode to catch when Blackberry 4.6 returns
// nodes that are no longer in the document #6963
if ( elem && elem.parentNode ) {
// Handle the case where IE and Opera return items
// by name instead of ID
if ( elem.id !== match[ 2 ] ) {
return rootjQuery.find( selector );
}
// Otherwise, we inject the element directly into the jQuery object
this.length = 1;
this[ 0 ] = elem;
}
this.context = document;
this.selector = selector;
return this;
}
// HANDLE: $(expr, $(...))
} else if ( !context || context.jquery ) {
return ( context || root ).find( selector );
// HANDLE: $(expr, context)
// (which is just equivalent to: $(context).find(expr)
} else {
return this.constructor( context ).find( selector );
}
// HANDLE: $(DOMElement)
} else if ( selector.nodeType ) {
this.context = this[ 0 ] = selector;
this.length = 1;
return this;
// HANDLE: $(function)
// Shortcut for document ready
} else if ( jQuery.isFunction( selector ) ) {
return typeof root.ready !== "undefined" ?
root.ready( selector ) :
// Execute immediately if ready is not present
selector( jQuery );
}
if ( selector.selector !== undefined ) {
this.selector = selector.selector;
this.context = selector.context;
}
return jQuery.makeArray( selector, this );
};
// Give the init function the jQuery prototype for later instantiation
init.prototype = jQuery.fn;
// Initialize central reference
rootjQuery = jQuery( document );
var rparentsprev = /^(?:parents|prev(?:Until|All))/,
// methods guaranteed to produce a unique set when starting from a unique set
guaranteedUnique = {
children: true,
contents: true,
next: true,
prev: true
};
jQuery.fn.extend( {
has: function( target ) {
var i,
targets = jQuery( target, this ),
len = targets.length;
return this.filter( function() {
for ( i = 0; i < len; i++ ) {
if ( jQuery.contains( this, targets[ i ] ) ) {
return true;
}
}
} );
},
closest: function( selectors, context ) {
var cur,
i = 0,
l = this.length,
matched = [],
pos = rneedsContext.test( selectors ) || typeof selectors !== "string" ?
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 ) ) ) {
matched.push( cur );
break;
}
}
}
return this.pushStack( matched.length > 1 ? jQuery.uniqueSort( matched ) : matched );
},
// Determine the position of an element within
// the matched set of elements
index: function( elem ) {
// No argument, return index in parent
if ( !elem ) {
return ( this[ 0 ] && this[ 0 ].parentNode ) ? this.first().prevAll().length : -1;
}
// index in selector
if ( typeof elem === "string" ) {
return jQuery.inArray( this[ 0 ], jQuery( elem ) );
}
// Locate the position of the desired element
return jQuery.inArray(
// If it receives a jQuery object, the first element is used
elem.jquery ? elem[ 0 ] : elem, this );
},
add: function( selector, context ) {
return this.pushStack(
jQuery.uniqueSort(
jQuery.merge( this.get(), jQuery( selector, context ) )
)
);
},
addBack: function( selector ) {
return this.add( selector == null ?
this.prevObject : this.prevObject.filter( selector )
);
}
} );
function sibling( cur, dir ) {
do {
cur = cur[ dir ];
} while ( cur && cur.nodeType !== 1 );
return cur;
}
jQuery.each( {
parent: function( elem ) {
var parent = elem.parentNode;
return parent && parent.nodeType !== 11 ? parent : null;
},
parents: function( elem ) {
return dir( elem, "parentNode" );
},
parentsUntil: function( elem, i, until ) {
return dir( elem, "parentNode", until );
},
next: function( elem ) {
return sibling( elem, "nextSibling" );
},
prev: function( elem ) {
return sibling( elem, "previousSibling" );
},
nextAll: function( elem ) {
return dir( elem, "nextSibling" );
},
prevAll: function( elem ) {
return dir( elem, "previousSibling" );
},
nextUntil: function( elem, i, until ) {
return dir( elem, "nextSibling", until );
},
prevUntil: function( elem, i, until ) {
return dir( elem, "previousSibling", until );
},
siblings: function( elem ) {
return siblings( ( elem.parentNode || {} ).firstChild, elem );
},
children: function( elem ) {
return siblings( elem.firstChild );
},
contents: function( elem ) {
return jQuery.nodeName( elem, "iframe" ) ?
elem.contentDocument || elem.contentWindow.document :
jQuery.merge( [], elem.childNodes );
}
}, function( name, fn ) {
jQuery.fn[ name ] = function( until, selector ) {
var ret = jQuery.map( this, fn, until );
if ( name.slice( -5 ) !== "Until" ) {
selector = until;
}
if ( selector && typeof selector === "string" ) {
ret = jQuery.filter( selector, ret );
}
if ( this.length > 1 ) {
// Remove duplicates
if ( !guaranteedUnique[ name ] ) {
ret = jQuery.uniqueSort( ret );
}
// Reverse order for parents* and prev-derivatives
if ( rparentsprev.test( name ) ) {
ret = ret.reverse();
}
}
return this.pushStack( ret );
};
} );
var rnotwhite = ( /\S+/g );
// Convert String-formatted options into Object-formatted ones
function createOptions( options ) {
var object = {};
jQuery.each( options.match( rnotwhite ) || [], function( _, flag ) {
object[ flag ] = true;
} );
return object;
}
/*
* Create a callback list using the following parameters:
*
* options: an optional list of space-separated options that will change how
* the callback list behaves or a more traditional option object
*
* By default a callback list will act like an event callback list and can be
* "fired" multiple times.
*
* Possible options:
*
* once: will ensure the callback list can only be fired once (like a Deferred)
*
* memory: will keep track of previous values and will call any callback added
* after the list has been fired right away with the latest "memorized"
* values (like a Deferred)
*
* unique: will ensure a callback can only be added once (no duplicate in the list)
*
* stopOnFalse: interrupt callings when a callback returns false
*
*/
jQuery.Callbacks = function( options ) {
// Convert options from String-formatted to Object-formatted if needed
// (we check in cache first)
options = typeof options === "string" ?
createOptions( options ) :
jQuery.extend( {}, options );
var // Flag to know if list is currently firing
firing,
// Last fire value for non-forgettable lists
memory,
// Flag to know if list was already fired
fired,
// Flag to prevent firing
locked,
// Actual callback list
list = [],
// Queue of execution data for repeatable lists
queue = [],
// Index of currently firing callback (modified by add/remove as needed)
firingIndex = -1,
// Fire callbacks
fire = function() {
// Enforce single-firing
locked = options.once;
// Execute callbacks for all pending executions,
// respecting firingIndex overrides and runtime changes
fired = firing = true;
for ( ; queue.length; firingIndex = -1 ) {
memory = queue.shift();
while ( ++firingIndex < list.length ) {
// Run callback and check for early termination
if ( list[ firingIndex ].apply( memory[ 0 ], memory[ 1 ] ) === false &&
options.stopOnFalse ) {
// Jump to end and forget the data so .add doesn't re-fire
firingIndex = list.length;
memory = false;
}
}
}
// Forget the data if we're done with it
if ( !options.memory ) {
memory = false;
}
firing = false;
// Clean up if we're done firing for good
if ( locked ) {
// Keep an empty list if we have data for future add calls
if ( memory ) {
list = [];
// Otherwise, this object is spent
} else {
list = "";
}
}
},
// Actual Callbacks object
self = {
// Add a callback or a collection of callbacks to the list
add: function() {
if ( list ) {
// If we have memory from a past run, we should fire after adding
if ( memory && !firing ) {
firingIndex = list.length - 1;
queue.push( memory );
}
( function add( args ) {
jQuery.each( args, function( _, arg ) {
if ( jQuery.isFunction( arg ) ) {
if ( !options.unique || !self.has( arg ) ) {
list.push( arg );
}
} else if ( arg && arg.length && jQuery.type( arg ) !== "string" ) {
// Inspect recursively
add( arg );
}
} );
} )( arguments );
if ( memory && !firing ) {
fire();
}
}
return this;
},
// Remove a callback from the list
remove: function() {
jQuery.each( arguments, function( _, arg ) {
var index;
while ( ( index = jQuery.inArray( arg, list, index ) ) > -1 ) {
list.splice( index, 1 );
// Handle firing indexes
if ( index <= firingIndex ) {
firingIndex--;
}
}
} );
return this;
},
// Check if a given callback is in the list.
// If no argument is given, return whether or not list has callbacks attached.
has: function( fn ) {
return fn ?
jQuery.inArray( fn, list ) > -1 :
list.length > 0;
},
// Remove all callbacks from the list
empty: function() {
if ( list ) {
list = [];
}
return this;
},
// Disable .fire and .add
// Abort any current/pending executions
// Clear all callbacks and values
disable: function() {
locked = queue = [];
list = memory = "";
return this;
},
disabled: function() {
return !list;
},
// Disable .fire
// Also disable .add unless we have memory (since it would have no effect)
// Abort any pending executions
lock: function() {
locked = true;
if ( !memory ) {
self.disable();
}
return this;
},
locked: function() {
return !!locked;
},
// Call all callbacks with the given context and arguments
fireWith: function( context, args ) {
if ( !locked ) {
args = args || [];
args = [ context, args.slice ? args.slice() : args ];
queue.push( args );
if ( !firing ) {
fire();
}
}
return this;
},
// Call all the callbacks with the given arguments
fire: function() {
self.fireWith( this, arguments );
return this;
},
// To know if the callbacks have already been called at least once
fired: function() {
return !!fired;
}
};
return self;
};
jQuery.extend( {
Deferred: function( func ) {
var tuples = [
// action, add listener, listener list, final state
[ "resolve", "done", jQuery.Callbacks( "once memory" ), "resolved" ],
[ "reject", "fail", jQuery.Callbacks( "once memory" ), "rejected" ],
[ "notify", "progress", jQuery.Callbacks( "memory" ) ]
],
state = "pending",
promise = {
state: function() {
return state;
},
always: function() {
deferred.done( arguments ).fail( arguments );
return this;
},
then: function( /* fnDone, fnFail, fnProgress */ ) {
var fns = arguments;
return jQuery.Deferred( function( newDefer ) {
jQuery.each( tuples, function( i, tuple ) {
var fn = jQuery.isFunction( fns[ i ] ) && fns[ i ];
// deferred[ done | fail | progress ] for forwarding actions to newDefer
deferred[ tuple[ 1 ] ]( function() {
var returned = fn && fn.apply( this, arguments );
if ( returned && jQuery.isFunction( returned.promise ) ) {
returned.promise()
.progress( newDefer.notify )
.done( newDefer.resolve )
.fail( newDefer.reject );
} else {
newDefer[ tuple[ 0 ] + "With" ](
this === promise ? newDefer.promise() : this,
fn ? [ returned ] : arguments
);
}
} );
} );
fns = null;
} ).promise();
},
// Get a promise for this deferred
// If obj is provided, the promise aspect is added to the object
promise: function( obj ) {
return obj != null ? jQuery.extend( obj, promise ) : promise;
}
},
deferred = {};
// Keep pipe for back-compat
promise.pipe = promise.then;
// Add list-specific methods
jQuery.each( tuples, function( i, tuple ) {
var list = tuple[ 2 ],
stateString = tuple[ 3 ];
// promise[ done | fail | progress ] = list.add
promise[ tuple[ 1 ] ] = list.add;
// Handle state
if ( stateString ) {
list.add( function() {
// state = [ resolved | rejected ]
state = stateString;
// [ reject_list | resolve_list ].disable; progress_list.lock
}, tuples[ i ^ 1 ][ 2 ].disable, tuples[ 2 ][ 2 ].lock );
}
// deferred[ resolve | reject | notify ]
deferred[ tuple[ 0 ] ] = function() {
deferred[ tuple[ 0 ] + "With" ]( this === deferred ? promise : this, arguments );
return this;
};
deferred[ tuple[ 0 ] + "With" ] = list.fireWith;
} );
// Make the deferred a promise
promise.promise( deferred );
// Call given func if any
if ( func ) {
func.call( deferred, deferred );
}
// All done!
return deferred;
},
// Deferred helper
when: function( subordinate /* , ..., subordinateN */ ) {
var i = 0,
resolveValues = slice.call( arguments ),
length = resolveValues.length,
// the count of uncompleted subordinates
remaining = length !== 1 ||
( subordinate && jQuery.isFunction( subordinate.promise ) ) ? length : 0,
// the master Deferred.
// If resolveValues consist of only a single Deferred, just use that.
deferred = remaining === 1 ? subordinate : jQuery.Deferred(),
// Update function for both resolve and progress values
updateFunc = function( i, contexts, values ) {
return function( value ) {
contexts[ i ] = this;
values[ i ] = arguments.length > 1 ? slice.call( arguments ) : value;
if ( values === progressValues ) {
deferred.notifyWith( contexts, values );
} else if ( !( --remaining ) ) {
deferred.resolveWith( contexts, values );
}
};
},
progressValues, progressContexts, resolveContexts;
// add listeners to Deferred subordinates; treat others as resolved
if ( length > 1 ) {
progressValues = new Array( length );
progressContexts = new Array( length );
resolveContexts = new Array( length );
for ( ; i < length; i++ ) {
if ( resolveValues[ i ] && jQuery.isFunction( resolveValues[ i ].promise ) ) {
resolveValues[ i ].promise()
.progress( updateFunc( i, progressContexts, progressValues ) )
.done( updateFunc( i, resolveContexts, resolveValues ) )
.fail( deferred.reject );
} else {
--remaining;
}
}
}
// if we're not waiting on anything, resolve the master
if ( !remaining ) {
deferred.resolveWith( resolveContexts, resolveValues );
}
return deferred.promise();
}
} );
// The deferred used on DOM ready
var readyList;
jQuery.fn.ready = function( fn ) {
// Add the callback
jQuery.ready.promise().done( fn );
return this;
};
jQuery.extend( {
// Is the DOM ready to be used? Set to true once it occurs.
isReady: false,
// A counter to track how many items to wait for before
// the ready event fires. See #6781
readyWait: 1,
// Hold (or release) the ready event
holdReady: function( hold ) {
if ( hold ) {
jQuery.readyWait++;
} else {
jQuery.ready( true );
}
},
// Handle when the DOM is ready
ready: function( wait ) {
// Abort if there are pending holds or we're already ready
if ( wait === true ? --jQuery.readyWait : jQuery.isReady ) {
return;
}
// Remember that the DOM is ready
jQuery.isReady = true;
// If a normal DOM Ready event fired, decrement, and wait if need be
if ( wait !== true && --jQuery.readyWait > 0 ) {
return;
}
// If there are functions bound, to execute
readyList.resolveWith( document, [ jQuery ] );
// Trigger any bound ready events
if ( jQuery.fn.triggerHandler ) {
jQuery( document ).triggerHandler( "ready" );
jQuery( document ).off( "ready" );
}
}
} );
/**
* Clean-up method for dom ready events
*/
function detach() {
if ( document.addEventListener ) {
document.removeEventListener( "DOMContentLoaded", completed );
window.removeEventListener( "load", completed );
} else {
document.detachEvent( "onreadystatechange", completed );
window.detachEvent( "onload", completed );
}
}
/**
* The ready event handler and self cleanup method
*/
function completed() {
// readyState === "complete" is good enough for us to call the dom ready in oldIE
if ( document.addEventListener ||
window.event.type === "load" ||
document.readyState === "complete" ) {
detach();
jQuery.ready();
}
}
jQuery.ready.promise = function( obj ) {
if ( !readyList ) {
readyList = jQuery.Deferred();
// Catch cases where $(document).ready() is called
// after the browser event has already occurred.
// Support: IE6-10
// Older IE sometimes signals "interactive" too soon
if ( document.readyState === "complete" ||
( document.readyState !== "loading" && !document.documentElement.doScroll ) ) {
// Handle it asynchronously to allow scripts the opportunity to delay ready
window.setTimeout( jQuery.ready );
// Standards-based browsers support DOMContentLoaded
} else if ( document.addEventListener ) {
// Use the handy event callback
document.addEventListener( "DOMContentLoaded", completed );
// A fallback to window.onload, that will always work
window.addEventListener( "load", completed );
// If IE event model is used
} else {
// Ensure firing before onload, maybe late but safe also for iframes
document.attachEvent( "onreadystatechange", completed );
// A fallback to window.onload, that will always work
window.attachEvent( "onload", completed );
// If IE and not a frame
// continually check to see if the document is ready
var top = false;
try {
top = window.frameElement == null && document.documentElement;
} catch ( e ) {}
if ( top && top.doScroll ) {
( function doScrollCheck() {
if ( !jQuery.isReady ) {
try {
// Use the trick by Diego Perini
// http://javascript.nwbox.com/IEContentLoaded/
top.doScroll( "left" );
} catch ( e ) {
return window.setTimeout( doScrollCheck, 50 );
}
// detach all dom ready events
detach();
// and execute any waiting functions
jQuery.ready();
}
} )();
}
}
}
return readyList.promise( obj );
};
// Kick off the DOM ready check even if the user does not
jQuery.ready.promise();
// Support: IE<9
// Iteration over object's inherited properties before its own
var i;
for ( i in jQuery( support ) ) {
break;
}
support.ownFirst = i === "0";
// Note: most support tests are defined in their respective modules.
// false until the test is run
support.inlineBlockNeedsLayout = false;
// Execute ASAP in case we need to set body.style.zoom
jQuery( function() {
// Minified: var a,b,c,d
var val, div, body, container;
body = document.getElementsByTagName( "body" )[ 0 ];
if ( !body || !body.style ) {
// Return for frameset docs that don't have a body
return;
}
// Setup
div = document.createElement( "div" );
container = document.createElement( "div" );
container.style.cssText = "position:absolute;border:0;width:0;height:0;top:0;left:-9999px";
body.appendChild( container ).appendChild( div );
if ( typeof div.style.zoom !== "undefined" ) {
// Support: IE<8
// Check if natively block-level elements act like inline-block
// elements when setting their display to 'inline' and giving
// them layout
div.style.cssText = "display:inline;margin:0;border:0;padding:1px;width:1px;zoom:1";
support.inlineBlockNeedsLayout = val = div.offsetWidth === 3;
if ( val ) {
// Prevent IE 6 from affecting layout for positioned elements #11048
// Prevent IE from shrinking the body in IE 7 mode #12869
// Support: IE<8
body.style.zoom = 1;
}
}
body.removeChild( container );
} );
( function() {
var div = document.createElement( "div" );
// Support: IE<9
support.deleteExpando = true;
try {
delete div.test;
} catch ( e ) {
support.deleteExpando = false;
}
// Null elements to avoid leaks in IE.
div = null;
} )();
var acceptData = function( elem ) {
var noData = jQuery.noData[ ( elem.nodeName + " " ).toLowerCase() ],
nodeType = +elem.nodeType || 1;
// Do not set data on non-element DOM nodes because it will not be cleared (#8335).
return nodeType !== 1 && nodeType !== 9 ?
false :
// Nodes accept data unless otherwise specified; rejection can be conditional
!noData || noData !== true && elem.getAttribute( "classid" ) === noData;
};
var rbrace = /^(?:\{[\w\W]*\}|\[[\w\W]*\])$/,
rmultiDash = /([A-Z])/g;
function dataAttr( elem, key, data ) {
// If nothing was found internally, try to fetch any
// data from the HTML5 data-* attribute
if ( data === undefined && elem.nodeType === 1 ) {
var name = "data-" + key.replace( rmultiDash, "-$1" ).toLowerCase();
data = elem.getAttribute( name );
if ( typeof data === "string" ) {
try {
data = data === "true" ? true :
data === "false" ? false :
data === "null" ? null :
// Only convert to a number if it doesn't change the string
+data + "" === data ? +data :
rbrace.test( data ) ? jQuery.parseJSON( data ) :
data;
} catch ( e ) {}
// Make sure we set the data so it isn't changed later
jQuery.data( elem, key, data );
} else {
data = undefined;
}
}
return data;
}
// checks a cache object for emptiness
function isEmptyDataObject( obj ) {
var name;
for ( name in obj ) {
// if the public data object is empty, the private is still empty
if ( name === "data" && jQuery.isEmptyObject( obj[ name ] ) ) {
continue;
}
if ( name !== "toJSON" ) {
return false;
}
}
return true;
}
function internalData( elem, name, data, pvt /* Internal Use Only */ ) {
if ( !acceptData( elem ) ) {
return;
}
var ret, thisCache,
internalKey = jQuery.expando,
// We have to handle DOM nodes and JS objects differently because IE6-7
// can't GC object references properly across the DOM-JS boundary
isNode = elem.nodeType,
// Only DOM nodes need the global jQuery cache; JS object data is
// attached directly to the object so GC can occur automatically
cache = isNode ? jQuery.cache : elem,
// Only defining an ID for JS objects if its cache already exists allows
// the code to shortcut on the same path as a DOM node with no cache
id = isNode ? elem[ internalKey ] : elem[ internalKey ] && internalKey;
// Avoid doing any more work than we need to when trying to get data on an
// object that has no data at all
if ( ( !id || !cache[ id ] || ( !pvt && !cache[ id ].data ) ) &&
data === undefined && typeof name === "string" ) {
return;
}
if ( !id ) {
// Only DOM nodes need a new unique ID for each element since their data
// ends up in the global cache
if ( isNode ) {
id = elem[ internalKey ] = deletedIds.pop() || jQuery.guid++;
} else {
id = internalKey;
}
}
if ( !cache[ id ] ) {
// Avoid exposing jQuery metadata on plain JS objects when the object
// is serialized using JSON.stringify
cache[ id ] = isNode ? {} : { toJSON: jQuery.noop };
}
// An object can be passed to jQuery.data instead of a key/value pair; this gets
// shallow copied over onto the existing cache
if ( typeof name === "object" || typeof name === "function" ) {
if ( pvt ) {
cache[ id ] = jQuery.extend( cache[ id ], name );
} else {
cache[ id ].data = jQuery.extend( cache[ id ].data, name );
}
}
thisCache = cache[ id ];
// jQuery data() is stored in a separate object inside the object's internal data
// cache in order to avoid key collisions between internal data and user-defined
// data.
if ( !pvt ) {
if ( !thisCache.data ) {
thisCache.data = {};
}
thisCache = thisCache.data;
}
if ( data !== undefined ) {
thisCache[ jQuery.camelCase( name ) ] = data;
}
// Check for both converted-to-camel and non-converted data property names
// If a data property was specified
if ( typeof name === "string" ) {
// First Try to find as-is property data
ret = thisCache[ name ];
// Test for null|undefined property data
if ( ret == null ) {
// Try to find the camelCased property
ret = thisCache[ jQuery.camelCase( name ) ];
}
} else {
ret = thisCache;
}
return ret;
}
function internalRemoveData( elem, name, pvt ) {
if ( !acceptData( elem ) ) {
return;
}
var thisCache, i,
isNode = elem.nodeType,
// See jQuery.data for more information
cache = isNode ? jQuery.cache : elem,
id = isNode ? elem[ jQuery.expando ] : jQuery.expando;
// If there is already no cache entry for this object, there is no
// purpose in continuing
if ( !cache[ id ] ) {
return;
}
if ( name ) {
thisCache = pvt ? cache[ id ] : cache[ id ].data;
if ( thisCache ) {
// Support array or space separated string names for data keys
if ( !jQuery.isArray( name ) ) {
// try the string as a key before any manipulation
if ( name in thisCache ) {
name = [ name ];
} else {
// split the camel cased version by spaces unless a key with the spaces exists
name = jQuery.camelCase( name );
if ( name in thisCache ) {
name = [ name ];
} else {
name = name.split( " " );
}
}
} else {
// If "name" is an array of keys...
// When data is initially created, via ("key", "val") signature,
// keys will be converted to camelCase.
// Since there is no way to tell _how_ a key was added, remove
// both plain key and camelCase key. #12786
// This will only penalize the array argument path.
name = name.concat( jQuery.map( name, jQuery.camelCase ) );
}
i = name.length;
while ( i-- ) {
delete thisCache[ name[ i ] ];
}
// If there is no data left in the cache, we want to continue
// and let the cache object itself get destroyed
if ( pvt ? !isEmptyDataObject( thisCache ) : !jQuery.isEmptyObject( thisCache ) ) {
return;
}
}
}
// See jQuery.data for more information
if ( !pvt ) {
delete cache[ id ].data;
// Don't destroy the parent cache unless the internal data object
// had been the only thing left in it
if ( !isEmptyDataObject( cache[ id ] ) ) {
return;
}
}
// Destroy the cache
if ( isNode ) {
jQuery.cleanData( [ elem ], true );
// Use delete when supported for expandos or `cache` is not a window per isWindow (#10080)
/* jshint eqeqeq: false */
} else if ( support.deleteExpando || cache != cache.window ) {
/* jshint eqeqeq: true */
delete cache[ id ];
// When all else fails, undefined
} else {
cache[ id ] = undefined;
}
}
jQuery.extend( {
cache: {},
// The following elements (space-suffixed to avoid Object.prototype collisions)
// throw uncatchable exceptions if you attempt to set expando properties
noData: {
"applet ": true,
"embed ": true,
// ...but Flash objects (which have this classid) *can* handle expandos
"object ": "clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"
},
hasData: function( elem ) {
elem = elem.nodeType ? jQuery.cache[ elem[ jQuery.expando ] ] : elem[ jQuery.expando ];
return !!elem && !isEmptyDataObject( elem );
},
data: function( elem, name, data ) {
return internalData( elem, name, data );
},
removeData: function( elem, name ) {
return internalRemoveData( elem, name );
},
// For internal use only.
_data: function( elem, name, data ) {
return internalData( elem, name, data, true );
},
_removeData: function( elem, name ) {
return internalRemoveData( elem, name, true );
}
} );
jQuery.fn.extend( {
data: function( key, value ) {
var i, name, data,
elem = this[ 0 ],
attrs = elem && elem.attributes;
// Special expections of .data basically thwart jQuery.access,
// so implement the relevant behavior ourselves
// Gets all values
if ( key === undefined ) {
if ( this.length ) {
data = jQuery.data( elem );
if ( elem.nodeType === 1 && !jQuery._data( elem, "parsedAttrs" ) ) {
i = attrs.length;
while ( i-- ) {
// Support: IE11+
// The attrs elements can be null (#14894)
if ( attrs[ i ] ) {
name = attrs[ i ].name;
if ( name.indexOf( "data-" ) === 0 ) {
name = jQuery.camelCase( name.slice( 5 ) );
dataAttr( elem, name, data[ name ] );
}
}
}
jQuery._data( elem, "parsedAttrs", true );
}
}
return data;
}
// Sets multiple values
if ( typeof key === "object" ) {
return this.each( function() {
jQuery.data( this, key );
} );
}
return arguments.length > 1 ?
// Sets one value
this.each( function() {
jQuery.data( this, key, value );
} ) :
// Gets one value
// Try to fetch any internally stored data first
elem ? dataAttr( elem, key, jQuery.data( elem, key ) ) : undefined;
},
removeData: function( key ) {
return this.each( function() {
jQuery.removeData( this, key );
} );
}
} );
jQuery.extend( {
queue: function( elem, type, data ) {
var queue;
if ( elem ) {
type = ( type || "fx" ) + "queue";
queue = jQuery._data( elem, type );
// Speed up dequeue by getting out quickly if this is just a lookup
if ( data ) {
if ( !queue || jQuery.isArray( data ) ) {
queue = jQuery._data( elem, type, jQuery.makeArray( data ) );
} else {
queue.push( data );
}
}
return queue || [];
}
},
dequeue: function( elem, type ) {
type = type || "fx";
var queue = jQuery.queue( elem, type ),
startLength = queue.length,
fn = queue.shift(),
hooks = jQuery._queueHooks( elem, type ),
next = function() {
jQuery.dequeue( elem, type );
};
// If the fx queue is dequeued, always remove the progress sentinel
if ( fn === "inprogress" ) {
fn = queue.shift();
startLength--;
}
if ( fn ) {
// Add a progress sentinel to prevent the fx queue from being
// automatically dequeued
if ( type === "fx" ) {
queue.unshift( "inprogress" );
}
// clear up the last queue stop function
delete hooks.stop;
fn.call( elem, next, hooks );
}
if ( !startLength && hooks ) {
hooks.empty.fire();
}
},
// not intended for public consumption - generates a queueHooks object,
// or returns the current one
_queueHooks: function( elem, type ) {
var key = type + "queueHooks";
return jQuery._data( elem, key ) || jQuery._data( elem, key, {
empty: jQuery.Callbacks( "once memory" ).add( function() {
jQuery._removeData( elem, type + "queue" );
jQuery._removeData( elem, key );
} )
} );
}
} );
jQuery.fn.extend( {
queue: function( type, data ) {
var setter = 2;
if ( typeof type !== "string" ) {
data = type;
type = "fx";
setter--;
}
if ( arguments.length < setter ) {
return jQuery.queue( this[ 0 ], type );
}
return data === undefined ?
this :
this.each( function() {
var queue = jQuery.queue( this, type, data );
// ensure a hooks for this queue
jQuery._queueHooks( this, type );
if ( type === "fx" && queue[ 0 ] !== "inprogress" ) {
jQuery.dequeue( this, type );
}
} );
},
dequeue: function( type ) {
return this.each( function() {
jQuery.dequeue( this, type );
} );
},
clearQueue: function( type ) {
return this.queue( type || "fx", [] );
},
// Get a promise resolved when queues of a certain type
// are emptied (fx is the type by default)
promise: function( type, obj ) {
var tmp,
count = 1,
defer = jQuery.Deferred(),
elements = this,
i = this.length,
resolve = function() {
if ( !( --count ) ) {
defer.resolveWith( elements, [ elements ] );
}
};
if ( typeof type !== "string" ) {
obj = type;
type = undefined;
}
type = type || "fx";
while ( i-- ) {
tmp = jQuery._data( elements[ i ], type + "queueHooks" );
if ( tmp && tmp.empty ) {
count++;
tmp.empty.add( resolve );
}
}
resolve();
return defer.promise( obj );
}
} );
( function() {
var shrinkWrapBlocksVal;
support.shrinkWrapBlocks = function() {
if ( shrinkWrapBlocksVal != null ) {
return shrinkWrapBlocksVal;
}
// Will be changed later if needed.
shrinkWrapBlocksVal = false;
// Minified: var b,c,d
var div, body, container;
body = document.getElementsByTagName( "body" )[ 0 ];
if ( !body || !body.style ) {
// Test fired too early or in an unsupported environment, exit.
return;
}
// Setup
div = document.createElement( "div" );
container = document.createElement( "div" );
container.style.cssText = "position:absolute;border:0;width:0;height:0;top:0;left:-9999px";
body.appendChild( container ).appendChild( div );
// Support: IE6
// Check if elements with layout shrink-wrap their children
if ( typeof div.style.zoom !== "undefined" ) {
// Reset CSS: box-sizing; display; margin; border
div.style.cssText =
// Support: Firefox<29, Android 2.3
// Vendor-prefix box-sizing
"-webkit-box-sizing:content-box;-moz-box-sizing:content-box;" +
"box-sizing:content-box;display:block;margin:0;border:0;" +
"padding:1px;width:1px;zoom:1";
div.appendChild( document.createElement( "div" ) ).style.width = "5px";
shrinkWrapBlocksVal = div.offsetWidth !== 3;
}
body.removeChild( container );
return shrinkWrapBlocksVal;
};
} )();
var pnum = ( /[+-]?(?:\d*\.|)\d+(?:[eE][+-]?\d+|)/ ).source;
var rcssNum = new RegExp( "^(?:([+-])=|)(" + pnum + ")([a-z%]*)$", "i" );
var cssExpand = [ "Top", "Right", "Bottom", "Left" ];
var isHidden = function( elem, el ) {
// isHidden might be called from jQuery#filter function;
// in that case, element will be second argument
elem = el || elem;
return jQuery.css( elem, "display" ) === "none" ||
!jQuery.contains( elem.ownerDocument, elem );
};
function adjustCSS( elem, prop, valueParts, tween ) {
var adjusted,
scale = 1,
maxIterations = 20,
currentValue = tween ?
function() { return tween.cur(); } :
function() { return jQuery.css( elem, prop, "" ); },
initial = currentValue(),
unit = valueParts && valueParts[ 3 ] || ( jQuery.cssNumber[ prop ] ? "" : "px" ),
// Starting value computation is required for potential unit mismatches
initialInUnit = ( jQuery.cssNumber[ prop ] || unit !== "px" && +initial ) &&
rcssNum.exec( jQuery.css( elem, prop ) );
if ( initialInUnit && initialInUnit[ 3 ] !== unit ) {
// Trust units reported by jQuery.css
unit = unit || initialInUnit[ 3 ];
// Make sure we update the tween properties later on
valueParts = valueParts || [];
// Iteratively approximate from a nonzero starting point
initialInUnit = +initial || 1;
do {
// If previous iteration zeroed out, double until we get *something*.
// Use string for doubling so we don't accidentally see scale as unchanged below
scale = scale || ".5";
// Adjust and apply
initialInUnit = initialInUnit / scale;
jQuery.style( elem, prop, initialInUnit + unit );
// Update scale, tolerating zero or NaN from tween.cur()
// Break the loop if scale is unchanged or perfect, or if we've just had enough.
} while (
scale !== ( scale = currentValue() / initial ) && scale !== 1 && --maxIterations
);
}
if ( valueParts ) {
initialInUnit = +initialInUnit || +initial || 0;
// Apply relative offset (+=/-=) if specified
adjusted = valueParts[ 1 ] ?
initialInUnit + ( valueParts[ 1 ] + 1 ) * valueParts[ 2 ] :
+valueParts[ 2 ];
if ( tween ) {
tween.unit = unit;
tween.start = initialInUnit;
tween.end = adjusted;
}
}
return adjusted;
}
// Multifunctional method to get and set values of a collection
// The value/s can optionally be executed if it's a function
var access = function( elems, fn, key, value, chainable, emptyGet, raw ) {
var i = 0,
length = elems.length,
bulk = key == null;
// Sets many values
if ( jQuery.type( key ) === "object" ) {
chainable = true;
for ( i in key ) {
access( elems, fn, i, key[ i ], true, emptyGet, raw );
}
// Sets one value
} else if ( value !== undefined ) {
chainable = true;
if ( !jQuery.isFunction( value ) ) {
raw = true;
}
if ( bulk ) {
// Bulk operations run against the entire set
if ( raw ) {
fn.call( elems, value );
fn = null;
// ...except when executing function values
} else {
bulk = fn;
fn = function( elem, key, value ) {
return bulk.call( jQuery( elem ), value );
};
}
}
if ( fn ) {
for ( ; i < length; i++ ) {
fn(
elems[ i ],
key,
raw ? value : value.call( elems[ i ], i, fn( elems[ i ], key ) )
);
}
}
}
return chainable ?
elems :
// Gets
bulk ?
fn.call( elems ) :
length ? fn( elems[ 0 ], key ) : emptyGet;
};
var rcheckableType = ( /^(?:checkbox|radio)$/i );
var rtagName = ( /<([\w:-]+)/ );
var rscriptType = ( /^$|\/(?:java|ecma)script/i );
var rleadingWhitespace = ( /^\s+/ );
var nodeNames = "abbr|article|aside|audio|bdi|canvas|data|datalist|" +
"details|dialog|figcaption|figure|footer|header|hgroup|main|" +
"mark|meter|nav|output|picture|progress|section|summary|template|time|video";
function createSafeFragment( document ) {
var list = nodeNames.split( "|" ),
safeFrag = document.createDocumentFragment();
if ( safeFrag.createElement ) {
while ( list.length ) {
safeFrag.createElement(
list.pop()
);
}
}
return safeFrag;
}
( function() {
var div = document.createElement( "div" ),
fragment = document.createDocumentFragment(),
input = document.createElement( "input" );
// Setup
div.innerHTML = "
a";
// IE strips leading whitespace when .innerHTML is used
support.leadingWhitespace = div.firstChild.nodeType === 3;
// Make sure that tbody elements aren't automatically inserted
// IE will insert them into empty tables
support.tbody = !div.getElementsByTagName( "tbody" ).length;
// Make sure that link elements get serialized correctly by innerHTML
// This requires a wrapper element in IE
support.htmlSerialize = !!div.getElementsByTagName( "link" ).length;
// Makes sure cloning an html5 element does not cause problems
// Where outerHTML is undefined, this still works
support.html5Clone =
document.createElement( "nav" ).cloneNode( true ).outerHTML !== "<:nav>";
// Check if a disconnected checkbox will retain its checked
// value of true after appended to the DOM (IE6/7)
input.type = "checkbox";
input.checked = true;
fragment.appendChild( input );
support.appendChecked = input.checked;
// Make sure textarea (and checkbox) defaultValue is properly cloned
// Support: IE6-IE11+
div.innerHTML = "";
support.noCloneChecked = !!div.cloneNode( true ).lastChild.defaultValue;
// #11217 - WebKit loses check when the name is after the checked attribute
fragment.appendChild( div );
// Support: Windows Web Apps (WWA)
// `name` and `type` must use .setAttribute for WWA (#14901)
input = document.createElement( "input" );
input.setAttribute( "type", "radio" );
input.setAttribute( "checked", "checked" );
input.setAttribute( "name", "t" );
div.appendChild( input );
// Support: Safari 5.1, iOS 5.1, Android 4.x, Android 2.3
// old WebKit doesn't clone checked state correctly in fragments
support.checkClone = div.cloneNode( true ).cloneNode( true ).lastChild.checked;
// Support: IE<9
// Cloned elements keep attachEvent handlers, we use addEventListener on IE9+
support.noCloneEvent = !!div.addEventListener;
// Support: IE<9
// Since attributes and properties are the same in IE,
// cleanData must set properties to undefined rather than use removeAttribute
div[ jQuery.expando ] = 1;
support.attributes = !div.getAttribute( jQuery.expando );
} )();
// We have to close these tags to support XHTML (#13200)
var wrapMap = {
option: [ 1, "" ],
legend: [ 1, "" ],
area: [ 1, "" ],
// Support: IE8
param: [ 1, "" ],
thead: [ 1, "
", "
" ],
tr: [ 2, "
", "
" ],
col: [ 2, "
", "
" ],
td: [ 3, "
", "
" ],
// IE6-8 can't serialize link, script, style, or any html5 (NoScope) tags,
// unless wrapped in a div with non-breaking characters in front of it.
_default: support.htmlSerialize ? [ 0, "", "" ] : [ 1, "X
", "
" ]
};
// Support: IE8-IE9
wrapMap.optgroup = wrapMap.option;
wrapMap.tbody = wrapMap.tfoot = wrapMap.colgroup = wrapMap.caption = wrapMap.thead;
wrapMap.th = wrapMap.td;
function getAll( context, tag ) {
var elems, elem,
i = 0,
found = typeof context.getElementsByTagName !== "undefined" ?
context.getElementsByTagName( tag || "*" ) :
typeof context.querySelectorAll !== "undefined" ?
context.querySelectorAll( tag || "*" ) :
undefined;
if ( !found ) {
for ( found = [], elems = context.childNodes || context;
( elem = elems[ i ] ) != null;
i++
) {
if ( !tag || jQuery.nodeName( elem, tag ) ) {
found.push( elem );
} else {
jQuery.merge( found, getAll( elem, tag ) );
}
}
}
return tag === undefined || tag && jQuery.nodeName( context, tag ) ?
jQuery.merge( [ context ], found ) :
found;
}
// Mark scripts as having already been evaluated
function setGlobalEval( elems, refElements ) {
var elem,
i = 0;
for ( ; ( elem = elems[ i ] ) != null; i++ ) {
jQuery._data(
elem,
"globalEval",
!refElements || jQuery._data( refElements[ i ], "globalEval" )
);
}
}
var rhtml = /<|?\w+;/,
rtbody = / from table fragments
if ( !support.tbody ) {
// String was a
, *may* have spurious
elem = tag === "table" && !rtbody.test( elem ) ?
tmp.firstChild :
// String was a bare or
wrap[ 1 ] === "
" && !rtbody.test( elem ) ?
tmp :
0;
j = elem && elem.childNodes.length;
while ( j-- ) {
if ( jQuery.nodeName( ( tbody = elem.childNodes[ j ] ), "tbody" ) &&
!tbody.childNodes.length ) {
elem.removeChild( tbody );
}
}
}
jQuery.merge( nodes, tmp.childNodes );
// Fix #12392 for WebKit and IE > 9
tmp.textContent = "";
// Fix #12392 for oldIE
while ( tmp.firstChild ) {
tmp.removeChild( tmp.firstChild );
}
// Remember the top-level container for proper cleanup
tmp = safe.lastChild;
}
}
}
// Fix #11356: Clear elements from fragment
if ( tmp ) {
safe.removeChild( tmp );
}
// Reset defaultChecked for any radios and checkboxes
// about to be appended to the DOM in IE 6/7 (#8060)
if ( !support.appendChecked ) {
jQuery.grep( getAll( nodes, "input" ), fixDefaultChecked );
}
i = 0;
while ( ( elem = nodes[ i++ ] ) ) {
// Skip elements already in the context collection (trac-4087)
if ( selection && jQuery.inArray( elem, selection ) > -1 ) {
if ( ignored ) {
ignored.push( elem );
}
continue;
}
contains = jQuery.contains( elem.ownerDocument, elem );
// Append to fragment
tmp = getAll( safe.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 );
}
}
}
}
tmp = null;
return safe;
}
( function() {
var i, eventName,
div = document.createElement( "div" );
// Support: IE<9 (lack submit/change bubble), Firefox (lack focus(in | out) events)
for ( i in { submit: true, change: true, focusin: true } ) {
eventName = "on" + i;
if ( !( support[ i ] = eventName in window ) ) {
// Beware of CSP restrictions (https://developer.mozilla.org/en/Security/CSP)
div.setAttribute( eventName, "t" );
support[ i ] = div.attributes[ eventName ].expando === false;
}
}
// Null elements to avoid leaks in IE.
div = null;
} )();
var rformElems = /^(?:input|select|textarea)$/i,
rkeyEvent = /^key/,
rmouseEvent = /^(?:mouse|pointer|contextmenu|drag|drop)|click/,
rfocusMorph = /^(?:focusinfocus|focusoutblur)$/,
rtypenamespace = /^([^.]*)(?:\.(.+)|)/;
function returnTrue() {
return true;
}
function returnFalse() {
return false;
}
// Support: IE9
// See #13393 for more info
function safeActiveElement() {
try {
return document.activeElement;
} catch ( err ) { }
}
function on( elem, types, selector, data, fn, one ) {
var origFn, type;
// Types can be a map of types/handlers
if ( typeof types === "object" ) {
// ( types-Object, selector, data )
if ( typeof selector !== "string" ) {
// ( types-Object, data )
data = data || selector;
selector = undefined;
}
for ( type in types ) {
on( elem, type, selector, data, types[ type ], one );
}
return elem;
}
if ( data == null && fn == null ) {
// ( types, fn )
fn = selector;
data = selector = undefined;
} else if ( fn == null ) {
if ( typeof selector === "string" ) {
// ( types, selector, fn )
fn = data;
data = undefined;
} else {
// ( types, data, fn )
fn = data;
data = selector;
selector = undefined;
}
}
if ( fn === false ) {
fn = returnFalse;
} else if ( !fn ) {
return elem;
}
if ( one === 1 ) {
origFn = fn;
fn = function( event ) {
// Can use an empty set, since event contains the info
jQuery().off( event );
return origFn.apply( this, arguments );
};
// Use same guid so caller can remove using origFn
fn.guid = origFn.guid || ( origFn.guid = jQuery.guid++ );
}
return elem.each( function() {
jQuery.event.add( this, types, fn, data, selector );
} );
}
/*
* Helper functions for managing events -- not part of the public interface.
* Props to Dean Edwards' addEvent library for many of the ideas.
*/
jQuery.event = {
global: {},
add: function( elem, types, handler, data, selector ) {
var tmp, events, t, handleObjIn,
special, eventHandle, handleObj,
handlers, type, namespaces, origType,
elemData = jQuery._data( elem );
// Don't attach events to noData or text/comment nodes (but allow plain objects)
if ( !elemData ) {
return;
}
// Caller can pass in an object of custom data in lieu of the handler
if ( handler.handler ) {
handleObjIn = handler;
handler = handleObjIn.handler;
selector = handleObjIn.selector;
}
// Make sure that the handler has a unique ID, used to find/remove it later
if ( !handler.guid ) {
handler.guid = jQuery.guid++;
}
// Init the element's event structure and main handler, if this is the first
if ( !( events = elemData.events ) ) {
events = elemData.events = {};
}
if ( !( eventHandle = elemData.handle ) ) {
eventHandle = elemData.handle = function( e ) {
// Discard the second event of a jQuery.event.trigger() and
// when an event is called after a page has unloaded
return typeof jQuery !== "undefined" &&
( !e || jQuery.event.triggered !== e.type ) ?
jQuery.event.dispatch.apply( eventHandle.elem, arguments ) :
undefined;
};
// Add elem as a property of the handle fn to prevent a memory leak
// with IE non-native events
eventHandle.elem = elem;
}
// Handle multiple events separated by a space
types = ( types || "" ).match( rnotwhite ) || [ "" ];
t = types.length;
while ( t-- ) {
tmp = rtypenamespace.exec( types[ t ] ) || [];
type = origType = tmp[ 1 ];
namespaces = ( tmp[ 2 ] || "" ).split( "." ).sort();
// There *must* be a type, no attaching namespace-only handlers
if ( !type ) {
continue;
}
// If event changes its type, use the special event handlers for the changed type
special = jQuery.event.special[ type ] || {};
// If selector defined, determine special event api type, otherwise given type
type = ( selector ? special.delegateType : special.bindType ) || type;
// Update special based on newly reset type
special = jQuery.event.special[ type ] || {};
// handleObj is passed to all event handlers
handleObj = jQuery.extend( {
type: type,
origType: origType,
data: data,
handler: handler,
guid: handler.guid,
selector: selector,
needsContext: selector && jQuery.expr.match.needsContext.test( selector ),
namespace: namespaces.join( "." )
}, handleObjIn );
// Init the event handler queue if we're the first
if ( !( handlers = events[ type ] ) ) {
handlers = events[ type ] = [];
handlers.delegateCount = 0;
// Only use addEventListener/attachEvent if the special events handler returns false
if ( !special.setup ||
special.setup.call( elem, data, namespaces, eventHandle ) === false ) {
// Bind the global event handler to the element
if ( elem.addEventListener ) {
elem.addEventListener( type, eventHandle, false );
} else if ( elem.attachEvent ) {
elem.attachEvent( "on" + type, eventHandle );
}
}
}
if ( special.add ) {
special.add.call( elem, handleObj );
if ( !handleObj.handler.guid ) {
handleObj.handler.guid = handler.guid;
}
}
// Add to the element's handler list, delegates in front
if ( selector ) {
handlers.splice( handlers.delegateCount++, 0, handleObj );
} else {
handlers.push( handleObj );
}
// Keep track of which events have ever been used, for event optimization
jQuery.event.global[ type ] = true;
}
// Nullify elem to prevent memory leaks in IE
elem = null;
},
// Detach an event or set of events from an element
remove: function( elem, types, handler, selector, mappedTypes ) {
var j, handleObj, tmp,
origCount, t, events,
special, handlers, type,
namespaces, origType,
elemData = jQuery.hasData( elem ) && jQuery._data( elem );
if ( !elemData || !( events = elemData.events ) ) {
return;
}
// Once for each type.namespace in types; type may be omitted
types = ( types || "" ).match( rnotwhite ) || [ "" ];
t = types.length;
while ( t-- ) {
tmp = rtypenamespace.exec( types[ t ] ) || [];
type = origType = tmp[ 1 ];
namespaces = ( tmp[ 2 ] || "" ).split( "." ).sort();
// Unbind all events (on this namespace, if provided) for the element
if ( !type ) {
for ( type in events ) {
jQuery.event.remove( elem, type + types[ t ], handler, selector, true );
}
continue;
}
special = jQuery.event.special[ type ] || {};
type = ( selector ? special.delegateType : special.bindType ) || type;
handlers = events[ type ] || [];
tmp = tmp[ 2 ] &&
new RegExp( "(^|\\.)" + namespaces.join( "\\.(?:.*\\.|)" ) + "(\\.|$)" );
// Remove matching events
origCount = j = handlers.length;
while ( j-- ) {
handleObj = handlers[ j ];
if ( ( mappedTypes || origType === handleObj.origType ) &&
( !handler || handler.guid === handleObj.guid ) &&
( !tmp || tmp.test( handleObj.namespace ) ) &&
( !selector || selector === handleObj.selector ||
selector === "**" && handleObj.selector ) ) {
handlers.splice( j, 1 );
if ( handleObj.selector ) {
handlers.delegateCount--;
}
if ( special.remove ) {
special.remove.call( elem, handleObj );
}
}
}
// Remove generic event handler if we removed something and no more handlers exist
// (avoids potential for endless recursion during removal of special event handlers)
if ( origCount && !handlers.length ) {
if ( !special.teardown ||
special.teardown.call( elem, namespaces, elemData.handle ) === false ) {
jQuery.removeEvent( elem, type, elemData.handle );
}
delete events[ type ];
}
}
// Remove the expando if it's no longer used
if ( jQuery.isEmptyObject( events ) ) {
delete elemData.handle;
// removeData also checks for emptiness and clears the expando if empty
// so use it instead of delete
jQuery._removeData( elem, "events" );
}
},
trigger: function( event, data, elem, onlyHandlers ) {
var handle, ontype, cur,
bubbleType, special, tmp, i,
eventPath = [ elem || document ],
type = hasOwn.call( event, "type" ) ? event.type : event,
namespaces = hasOwn.call( event, "namespace" ) ? event.namespace.split( "." ) : [];
cur = tmp = elem = elem || document;
// Don't do events on text and comment nodes
if ( elem.nodeType === 3 || elem.nodeType === 8 ) {
return;
}
// focus/blur morphs to focusin/out; ensure we're not firing them right now
if ( rfocusMorph.test( type + jQuery.event.triggered ) ) {
return;
}
if ( type.indexOf( "." ) > -1 ) {
// Namespaced trigger; create a regexp to match event type in handle()
namespaces = type.split( "." );
type = namespaces.shift();
namespaces.sort();
}
ontype = type.indexOf( ":" ) < 0 && "on" + type;
// Caller can pass in a jQuery.Event object, Object, or just an event type string
event = event[ jQuery.expando ] ?
event :
new jQuery.Event( type, typeof event === "object" && event );
// Trigger bitmask: & 1 for native handlers; & 2 for jQuery (always true)
event.isTrigger = onlyHandlers ? 2 : 3;
event.namespace = namespaces.join( "." );
event.rnamespace = event.namespace ?
new RegExp( "(^|\\.)" + namespaces.join( "\\.(?:.*\\.|)" ) + "(\\.|$)" ) :
null;
// Clean up the event in case it is being reused
event.result = undefined;
if ( !event.target ) {
event.target = elem;
}
// Clone any incoming data and prepend the event, creating the handler arg list
data = data == null ?
[ event ] :
jQuery.makeArray( data, [ event ] );
// Allow special events to draw outside the lines
special = jQuery.event.special[ type ] || {};
if ( !onlyHandlers && special.trigger && special.trigger.apply( elem, data ) === false ) {
return;
}
// Determine event propagation path in advance, per W3C events spec (#9951)
// Bubble up to document, then to window; watch for a global ownerDocument var (#9724)
if ( !onlyHandlers && !special.noBubble && !jQuery.isWindow( elem ) ) {
bubbleType = special.delegateType || type;
if ( !rfocusMorph.test( bubbleType + type ) ) {
cur = cur.parentNode;
}
for ( ; cur; cur = cur.parentNode ) {
eventPath.push( cur );
tmp = cur;
}
// Only add window if we got to document (e.g., not plain obj or detached DOM)
if ( tmp === ( elem.ownerDocument || document ) ) {
eventPath.push( tmp.defaultView || tmp.parentWindow || window );
}
}
// Fire handlers on the event path
i = 0;
while ( ( cur = eventPath[ i++ ] ) && !event.isPropagationStopped() ) {
event.type = i > 1 ?
bubbleType :
special.bindType || type;
// jQuery handler
handle = ( jQuery._data( cur, "events" ) || {} )[ event.type ] &&
jQuery._data( cur, "handle" );
if ( handle ) {
handle.apply( cur, data );
}
// Native handler
handle = ontype && cur[ ontype ];
if ( handle && handle.apply && acceptData( cur ) ) {
event.result = handle.apply( cur, data );
if ( event.result === false ) {
event.preventDefault();
}
}
}
event.type = type;
// If nobody prevented the default action, do it now
if ( !onlyHandlers && !event.isDefaultPrevented() ) {
if (
( !special._default ||
special._default.apply( eventPath.pop(), data ) === false
) && acceptData( elem )
) {
// Call a native DOM method on the target with the same name name as the event.
// Can't use an .isFunction() check here because IE6/7 fails that test.
// Don't do default actions on window, that's where global variables be (#6170)
if ( ontype && elem[ type ] && !jQuery.isWindow( elem ) ) {
// Don't re-trigger an onFOO event when we call its FOO() method
tmp = elem[ ontype ];
if ( tmp ) {
elem[ ontype ] = null;
}
// Prevent re-triggering of the same event, since we already bubbled it above
jQuery.event.triggered = type;
try {
elem[ type ]();
} catch ( e ) {
// IE<9 dies on focus/blur to hidden element (#1486,#12518)
// only reproducible on winXP IE8 native, not IE9 in IE8 mode
}
jQuery.event.triggered = undefined;
if ( tmp ) {
elem[ ontype ] = tmp;
}
}
}
}
return event.result;
},
dispatch: function( event ) {
// Make a writable jQuery.Event from the native event object
event = jQuery.event.fix( event );
var i, j, ret, matched, handleObj,
handlerQueue = [],
args = slice.call( arguments ),
handlers = ( jQuery._data( this, "events" ) || {} )[ event.type ] || [],
special = jQuery.event.special[ event.type ] || {};
// Use the fix-ed jQuery.Event rather than the (read-only) native event
args[ 0 ] = event;
event.delegateTarget = this;
// Call the preDispatch hook for the mapped type, and let it bail if desired
if ( special.preDispatch && special.preDispatch.call( this, event ) === false ) {
return;
}
// Determine handlers
handlerQueue = jQuery.event.handlers.call( this, event, handlers );
// Run delegates first; they may want to stop propagation beneath us
i = 0;
while ( ( matched = handlerQueue[ i++ ] ) && !event.isPropagationStopped() ) {
event.currentTarget = matched.elem;
j = 0;
while ( ( handleObj = matched.handlers[ j++ ] ) &&
!event.isImmediatePropagationStopped() ) {
// Triggered event must either 1) have no namespace, or 2) have namespace(s)
// a subset or equal to those in the bound event (both can have no namespace).
if ( !event.rnamespace || event.rnamespace.test( handleObj.namespace ) ) {
event.handleObj = handleObj;
event.data = handleObj.data;
ret = ( ( jQuery.event.special[ handleObj.origType ] || {} ).handle ||
handleObj.handler ).apply( matched.elem, args );
if ( ret !== undefined ) {
if ( ( event.result = ret ) === false ) {
event.preventDefault();
event.stopPropagation();
}
}
}
}
}
// Call the postDispatch hook for the mapped type
if ( special.postDispatch ) {
special.postDispatch.call( this, event );
}
return event.result;
},
handlers: function( event, handlers ) {
var i, matches, sel, handleObj,
handlerQueue = [],
delegateCount = handlers.delegateCount,
cur = event.target;
// Support (at least): Chrome, IE9
// Find delegate handlers
// Black-hole SVG