/**
 * Created by nono on 14-11-16.
 */
/* Zepto v1.1.4 - zepto event ajax form ie - zeptojs.com/license */
var Zepto = $ = {};
$.fn = {};
var undefined, key, $, classList, emptyArray = [], slice = emptyArray.slice, filter = emptyArray.filter,
    document = window.document,
    elementDisplay = {},
    classCache = {},
    cssNumber = { 'column-count': 1, 'columns': 1, 'font-weight': 1, 'line-height': 1,'opacity': 1, 'z-index': 1, 'zoom': 1 },
// /^\s* 空格或者没有空格 <(\w+|!)标签内有内容[^>非结束标签]*> 标签结束/ 匹配内部的所有内容;
    fragmentRE = /^\s*<(\w+|!)[^>]*>/,
// /^<(\w+) 标签名字 \s*\ 有或者没有空格/?>有结束或者没有结束标签(?:<\/\1>|) 断言的结束标签,可以有或在可以没有$/;
    singleTagRE = /^<(\w+)\s*\/?>(?:<\/\1>|)$/,
// /<(?!area|br|col|embed|hr|img|input|link|meta|param)(([\w:]+)[^>]*)\/>/ig;
    tagExpanderRE = /<(?!area|br|col|embed|hr|img|input|link|meta|param)(([\w:]+)[^>]*)\/>/ig,
//匹配某个字符是否就是"html"或者"body";
    rootNodeRE = /^(?:body|html)$/i,
//有一个大写字母的话;
    capitalRE = /([A-Z])/g,

//设置属性的会掉用方法
// special attributes that should be get/set via method calls;
    methodAttributes = ['val', 'css', 'html', 'text', 'data', 'width', 'height', 'offset'],

    adjacencyOperators = [ 'after', 'prepend', 'before', 'append' ],
    table = document.createElement('table'),
    tableRow = document.createElement('tr'),
    containers = {
        //tr的父级为tbody;
        'tr': document.createElement('tbody'),
        //tbody,thead,tfoot的父级为table;
        'tbody': table,
        'thead': table,
        'tfoot': table,
        //同上;
        'td': tableRow,
        'th': tableRow,
        '*': document.createElement('div')
    },
//onreadystatechange 事件中的 readyState 是否加载完成的
    readyRE = /complete|loaded|interactive/,
//这个正则会匹配所有的字符串和-
    simpleSelectorRE = /^[\w-]*$/,
//
    class2type = {},
//快捷方法, 做类型判断;
    toString = class2type.toString,
//小写的zepto, 对象
    zepto = {},
//camelize, underscore, dashlize, capitalize;
    camelize, uniq,
    tempParent = document.createElement('div'),
//保留字腰转换
    propMap = {
        'tabindex': 'tabIndex',
        'readonly': 'readOnly',
        'for': 'htmlFor',
        'class': 'className',
        'maxlength': 'maxLength',
        'cellspacing': 'cellSpacing',
        'cellpadding': 'cellPadding',
        'rowspan': 'rowSpan',
        'colspan': 'colSpan',
        /*
         <img src="planets.gif" alt="Planets" usemap="#planetmap" />

         <map name="planetmap">
         <area href="sun.htm" shape="rect" coords="0,0,110,260">Sun</a>
         <area href="mercur.htm" shape="circle" coords="129,161,10">Mercury</a>
         <area href="venus.htm" shape="circle" coords="180,139,14">Venus</a>
         </map>
         */
        'usemap': 'useMap',
        'frameborder': 'frameBorder',
        'contenteditable': 'contentEditable'
    },
//简单的判断;
    isArray = Array.isArray ||
        function(object){ return object instanceof Array }

zepto.matches = function(element, selector) {
    if (!selector || !element || element.nodeType !== 1) return false
    var matchesSelector = element.webkitMatchesSelector || element.mozMatchesSelector ||
        element.oMatchesSelector || element.matchesSelector
    //if (matchesSelector) return element.matchesSelector(selector) 是不行的;还是用call靠谱;
    if (matchesSelector) return matchesSelector.call(element, selector)

    // fall back to performing a selector:
    var match, parent = element.parentNode, temp = !parent
    //tempParent = document.createElement('div') 因为这个元素可能为加入到 html中, 只在内存中(fragment);
    if (temp) (parent = tempParent).appendChild(element)
    //调用querySelectorAll
    //~“10" ==>> -11 ; ~"12"==>> -13;
    //~~"10" ==>> 10 ; ~~23 ==>> 23;
    match = ~zepto.qsa(parent, selector).indexOf(element)
    //除了 值为 -1计算出的值是0; 剩下的全部是非0的;
    temp && tempParent.removeChild(element)
    return match
}

function type(obj) {
    // 非全等于null就两种东西 null他自己和 undefined
    return obj == null ? String(obj) :
        class2type[toString.call(obj)] || "object"
}

function isFunction(value) { return type(value) == "function" }
function isWindow(obj)     { return obj != null && obj == obj.window }
// document.DOCUMENT_NODE === 9
function isDocument(obj)   { return obj != null && obj.nodeType == obj.DOCUMENT_NODE }
function isObject(obj)     { return type(obj) == "object" }
function isPlainObject(obj) {
    //是object 非window, 他的原型就是他自己;
    return isObject(obj) && !isWindow(obj) && Object.getPrototypeOf(obj) == Object.prototype
}
//简单的直接判断length就好了;
function likeArray(obj) { return typeof obj.length == 'number' }

//压缩, 把所有的 undefined 和 null去掉;
function compact(array) { return filter.call(array, function(item){ return item != null }) }

//把array
//[].concat.apply([],[1,2,3,4,[6,7]]) ==>> [1, 2, 3, 4, 6, 7]
function flatten(array) { return array.length > 0 ? $.fn.concat.apply([], array) : array }
camelize = function(str){ return str.replace(/-+(.)?/g, function(match, chr){ return chr ? chr.toUpperCase() : '' }) }
function dasherize(str) {
    return str.replace(/::/g, '/') //这个不是很懂为什么这样弄;
        .replace(/([A-Z]+)([A-Z][a-z])/g, '$1_$2') //"abcDef" ==> "abc_Def"
        .replace(/([a-z\d])([A-Z])/g, '$1_$2') //"abc1Def" ==> "abc1_Def"
        .replace(/_/g, '-') //把下划线替换成"-"
        .toLowerCase() //全部变小写字符;
}
//取数值的唯一
uniq = function(array){ return filter.call(array, function(item, idx){ return array.indexOf(item) == idx }) }
/*如果是我的话,我就会这样写
 function uniq(array) {
 var result = [];
 for(var i=0; i< array.length; i++) {
 if([].prototype.indexOf.call(array, array[i]) === i) {
 result.push( array[i] );
 }
 };
 return result;
 };
 */
//返回匹配class的正则; new RegExp("^|\\s"+ youClass +"\\s|$","g")
function classRE(name) {
    return name in classCache ?
        classCache[name] : (classCache[name] = new RegExp('(^|\\s)' + name + '(\\s|$)'))
}

//目前都是在初始化变量;
function maybeAddPx(name, value) {
    return (typeof value == "number" && !cssNumber[dasherize(name)]) ? value + "px" : value
}

//把默认的显示保存到缓存里面
function defaultDisplay(nodeName) {
    var element, display
    if (!elementDisplay[nodeName]) {
        element = document.createElement(nodeName)
        document.body.appendChild(element)
        display = getComputedStyle(element, '').getPropertyValue("display")
        element.parentNode.removeChild(element)
        display == "none" && (display = "block")
        elementDisplay[nodeName] = display
    }
    return elementDisplay[nodeName]
}

//把Nodes转化成数组;
function children(element) {
    return 'children' in element ?
        slice.call(element.children) :
        $.map(element.childNodes, function(node){ if (node.nodeType == 1) return node })
}

// `$.zepto.fragment` takes a html string and an optional tag name
// to generate DOM nodes nodes from the given html string.
// The generated DOM nodes are returned as an array.
// This function can be overriden in plugins for example to make
// it compatible with browsers that don't support the DOM fully.
zepto.fragment = function(html, name, properties) {
    var dom, nodes, container

    //只是单标签的情况下,优化单标签,剩下的全部跑下面代码;
    // A special case optimization for a single tag
    //singleTagRE = /^<(\w+)\s*\/?>(?:<\/\1>|)$/,
    if (singleTagRE.test(html)) dom = $(document.createElement(RegExp.$1))

    //dom为空的话说明没匹配到;
    if (!dom) {
        //有replace方法就说明是字符串,把原来的字符串替换成合法的html字符串;
        if (html.replace) html = html.replace(tagExpanderRE, "<$1></$2>")
        //fragmentRE = /^\s*<(\w+|!)[^>]*>/,
        //name必须严格等于undefined,如果name为空就永远是div为父级的;
        if (name === undefined) name = fragmentRE.test(html) && RegExp.$1
        //自动为元素添加父级,没有就是新建div了;
        //
        if (!(name in containers)) name = '*'
        /*
         containers = {
         //tr的父级为tbody;
         'tr': document.createElement('tbody'),
         //tbody,thead,tfoot的父级为table;
         'tbody': table,
         'thead': table,
         'tfoot': table,
         //同上;
         'td': tableRow,
         'th': tableRow,
         '*': document.createElement('div')
         },
         */
        //containers[name] = document.createElement("div")
        container = containers[name]
        container.innerHTML = '' + html
        //把container内部的所有子元素删除, 然后返回被删除的元素;
        dom = $.each(slice.call(container.childNodes), function(){
            container.removeChild(this)
        });
    };

    //为dom这个节点添加属性;
    if (isPlainObject(properties)) {
        nodes = $(dom)
        $.each(properties, function(key, value) {
            //存在这个快捷方法的话;
            if (methodAttributes.indexOf(key) > -1) nodes[key](value)
            else nodes.attr(key, value)
        })
    };

    //dom是数组排列的DOM元素;
    return dom
}

// `$.zepto.Z` swaps out the prototype of the given `dom` array
// of nodes with `$.fn` and thus supplying all the Zepto functions
// to the array. Note that `__proto__` is not supported on Internet
// Explorer. This method can be overriden in plugins.
//把dom元素选中以后,用zepto.Z包装, 然后返回;
zepto.Z = function(dom, selector) {
    dom = dom || []
    //绑定原型  __proto__;
    dom.__proto__ = $.fn
    dom.selector = selector || ''
    return dom;
}

// `$.zepto.isZ` should return `true` if the given object is a Zepto
// collection. This method can be overriden in plugins.
zepto.isZ = function(object) {
    //zepto.Z.prototype === $.fn ==>> true;
    //zepto.Z的原型就是$.fn, $.fn必定了很多方法;
    return object instanceof zepto.Z //初始化的时候手动设置zepto.Z.prototype = $.fn;
    //和下面这写法一摸一样;
    //var temp = function() {};
    //temp.prototype = $.fn;
    //return object instanceof temp;
}

// `$.zepto.init` is Zepto's counterpart to jQuery's `$.fn.init` and
// takes a CSS selector and an optional context (and handles various
// special cases).
// This method can be overriden in plugins.
zepto.init = function(selector, context) {
    var dom
    // If nothing given, return an empty Zepto collection
    if (!selector) return zepto.Z()
    // Optimize for string selectors
    //如果是字符串就只有两种情况1:新建元素,2:查找元素;
    //查找元素如果有context就按照context找,否则就从document找;
    else if (typeof selector == 'string') {
        selector = selector.trim()
        // If it's a html fragment, create nodes from it
        // Note: In both Chrome 21 and Firefox 15, DOM error 12
        // is thrown if the fragment doesn't begin with <
        //fragmentRE = /^\s*<(\w+|!)[^>]*>/,正则匹配单标签;
        if (selector[0] == '<' && fragmentRE.test(selector))
        //新建dom元素;
            dom = zepto.fragment(selector, RegExp.$1, context), selector = null
        // If there's a context, create a collection on that context first, and select
        // nodes from there
        //直接查找元素;
        //dom  = zepto.qsa(context || document, select)
        else if (context !== undefined) return $(context).find(selector)
        // If it's a CSS selector, use it to select nodes.
        else dom = zepto.qsa(document, selector)
    }
    // If a function is given, call it when the DOM is ready
    //DOMContentready;
    else if (isFunction(selector)) return $(document).ready(selector)
    // If a Zepto collection is given, just return it
    else if (zepto.isZ(selector)) return selector
    else {
        //$([1,2,3,4,5,5,5,6,2,2,undefined,null]) ==>> [1, 2, 3, 4, 5, 5, 5, 6, 2, 2]去除值为undefined和null的元素;
        // normalize array if an array of nodes is given
        if (isArray(selector)) dom = compact(selector)
        // Wrap DOM nodes.
        //直接假设是dom节点元素了;
        else if (isObject(selector))
            dom = [selector], selector = null
        // If it's a html fragment, create nodes from it
        //试过了使用正则test这个碎片对象不行,我不知道为什么跑这边来了;
        else if (fragmentRE.test(selector))
            dom = zepto.fragment(selector.trim(), RegExp.$1, context), selector = null
        // If there's a context, create a collection on that context first, and select
        // nodes from there
        else if (context !== undefined) return $(context).find(selector)
        // And last but no least, if it's a CSS selector, use it to select nodes.
        else dom = zepto.qsa(document, selector)
    }
    // create a new Zepto collection from the nodes found
    return zepto.Z(dom, selector)
}

// `$` will be the base `Zepto` object. When calling this
// function just call `$.zepto.init, which makes the implementation
// details of selecting nodes and creating Zepto collections
// patchable in plugins.
$ = function(selector, context){
    return zepto.init(selector, context);
}

function extend(target, source, deep) {
    for (key in source)
        //深度复制,可能是存对象或者是数组, 是function或者是字符串或者是数字或者基本类型的不会走这边;
        if (deep && (isPlainObject(source[key]) || isArray(source[key]))) {
            //是对象,而且target的这个属性是空的,说明不会覆盖原来的属性;
            if (isPlainObject(source[key]) && !isPlainObject(target[key]))
            //新建
                target[key] = {}
            if (isArray(source[key]) && !isArray(target[key]))
                target[key] = []

            extend(target[key], source[key], deep)
        }
        else if (source[key] !== undefined) target[key] = source[key]
};

// Copy all but undefined properties from one or more
// objects to the `target` object.
//$.extend(a,b,c,d,e,f,g);所有的都继承到a里面去;
//深度赋值继承,$.extend(true,a,b,c,d,e,f,g);所有的都继承到a里面去;
$.extend = function(target){
    var deep, args = slice.call(arguments, 1)
    if (typeof target == 'boolean') {
        deep = target
        target = args.shift()
    }
    args.forEach(function(arg){ extend(target, arg, deep) })
    return target
};

// `$.zepto.qsa` is Zepto's CSS selector implementation which
// uses `document.querySelectorAll` and optimizes for some special cases, like `#id`.
// This method can be overriden in plugins.
zepto.qsa = function(element, selector){
    var found,
        maybeID = selector[0] == '#',
        maybeClass = !maybeID && selector[0] == '.',
        nameOnly = maybeID || maybeClass ? selector.slice(1) : selector, // Ensure that a 1 char tag name still gets checked
    //simpleSelectorRE = /^[\w-]*$/
        isSimple = simpleSelectorRE.test(nameOnly);

    return (isDocument(element) && isSimple && maybeID) ?
        //ID
        ( (found = element.getElementById(nameOnly)) ? [found] : [] ) :
        (element.nodeType !== 1 && element.nodeType !== 9) ? [] :
            //优化;
            //转化成数组;
            slice.call(
                isSimple && !maybeID ?
                    maybeClass ? element.getElementsByClassName(nameOnly) : // If it's simple, it could be a class
                        element.getElementsByTagName(selector) : // Or a tag
                    element.querySelectorAll(selector) // Or it's not simple, and we need to query all
            )
};

//这个东西有点象match方法;
//从nodes里面选择匹配selector的元素;
function filtered(nodes, selector) {
    return selector == null ? $(nodes) : $(nodes).filter(selector)
}

$.contains = document.documentElement.contains ?
    function(parent, node) {
        return parent !== node && parent.contains(node)
    } :
    function(parent, node) {
        while (node && (node = node.parentNode))
            if (node === parent) return true
        return false
    };

//跑func,并用context作为上下文;
function funcArg(context, arg, idx, payload) {
    return isFunction(arg) ? arg.call(context, idx, payload) : arg
}

//删除或者是设置;
function setAttribute(node, name, value) {
    value == null ? node.removeAttribute(name) : node.setAttribute(name, value)
}

//返回className并做了svg的兼容,TMD的SVG是什么东西;
// access className property while respecting SVGAnimatedString
function className(node, value){
    var klass = node.className,
        svg   = klass && klass.baseVal !== undefined

    if (value === undefined) return svg ? klass.baseVal : klass
    svg ? (klass.baseVal = value) : (node.className = value)
}

// "true"  => true
// "false" => false
// "null"  => null
// "42"    => 42
// "42.5"  => 42.5
// "08"    => "08"
// JSON    => parse if valid
// String  => self;
//反序列化;
function deserializeValue(value) {
    var num
    try {
        return value ?
            value == "true" ||

                ( value == "false" ? false :
                    value == "null" ? null :
                        !/^0/.test(value) && !isNaN(num = Number(value)) ? num :
                            /^[\[\{]/.test(value) ? $.parseJSON(value) :
                                value )
            : value
    } catch(e) {
        return value
    }
};

$.type = type
$.isFunction = isFunction
$.isWindow = isWindow
$.isArray = isArray
$.isPlainObject = isPlainObject

$.isEmptyObject = function(obj) {
    var name
    for (name in obj) return false
    return true
};

$.inArray = function(elem, array, i){
    return emptyArray.indexOf.call(array, elem, i)
};

$.camelCase = camelize
$.trim = function(str) {
    return str == null ? "" : String.prototype.trim.call(str)
}

// plugin compatibility
$.uuid = 0
$.support = { }
$.expr = { }

// xx != null  ==>>  xx!==undefined, xx!==null
//map循环的参数第一个是值,如果是array类型第二个是index,是object类型就是key;
$.map = function(elements, callback){
    var value, values = [], i, key
    if (likeArray(elements))
        for (i = 0; i < elements.length; i++) {
            value = callback(elements[i], i)
            if (value != null) values.push(value)
        }
    else
        for (key in elements) {
            value = callback(elements[key], key)
            if (value != null) values.push(value)
        }
    return flatten(values)
}

$.each = function(elements, callback){
    var i, key
    if (likeArray(elements)) {
        for (i = 0; i < elements.length; i++)
            //index, value;
            if (callback.call(elements[i], i, elements[i]) === false) return elements
    } else {
        for (key in elements)
            //index, value;
            if (callback.call(elements[key], key, elements[key]) === false) return elements
    }

    return elements
}

//$.grep是和jQuery里面一样的;
$.grep = function(elements, callback){
    return filter.call(elements, callback)
}

if (window.JSON) $.parseJSON = JSON.parse

// Populate the class2type map
$.each("Boolean Number String Function Array Date RegExp Object Error".split(" "), function(i, name) {
    class2type[ "[object " + name + "]" ] = name.toLowerCase()
})

// Define methods that will be available on all
// Zepto collections
$.fn = {
    // Because a collection acts like an array
    // copy over these useful array functions.
    forEach: emptyArray.forEach,
    reduce: emptyArray.reduce,
    push: emptyArray.push,
    sort: emptyArray.sort,
    indexOf: emptyArray.indexOf,
    concat: emptyArray.concat,

    // `map` and `slice` in the jQuery API work differently
    // from their array counterparts
    //封装了一个fn方法, 改变了上下文为el, 参数列表为i, el;
    map: function(fn){
        return $($.map(this, function(el, i){ return fn.call(el, i, el) }));
    },
    //把当前选择的对象变成存数组对象;
    slice: function(){
        return $(slice.apply(this, arguments));
    },
    ready: function(callback){
        // need to check if document.body exists for IE as that browser reports
        // document ready when it hasn't yet created the body element
        // readyRE === /complete|loaded|interactive/
        //document的readyState状态加载完毕就直接执行,这东西是IE先有的,后来标准化了,所以没有什么兼容问题;
        if (readyRE.test(document.readyState) && document.body) callback($)
        //利用事件必定执行;
        else document.addEventListener('DOMContentLoaded', function(){ callback($) }, false)
        return this
    },
    //把所有人切成数组,或者是某一个;
    get: function(idx){
        return idx === undefined ? slice.call(this) : this[idx >= 0 ? idx : idx + this.length]
    },
    toArray: function(){ return this.get() },
    //为了跟jQ的接口统一
    size: function(){
        return this.length
    },
    remove: function(){
        return this.each(function(){
            if (this.parentNode != null)
                this.parentNode.removeChild(this)
        })
    },
    //这个只要返回值是false也停止迭代了,与jQ统一;
    each: function(callback){
        //只要call的东西有length而且有下标,只要是类数组都可以;
        //是value和key, 不要忘记了;
        emptyArray.every.call(this, function(el, idx){
            return callback.call(el, idx, el) !== false
        })
        return this
    },
    filter: function(selector){
        if (isFunction(selector)) return this.not(this.not(selector))
        //迭代每一个选中的元素;, 过滤掉当前元素不符合选择器selector的元素;
        return $(filter.call(this, function(element){
            return zepto.matches(element, selector)
        }))
    },
    //说明当前元素是HTMLELEMENTS,或者是NODES
    add: function(selector,context){
        //选择元素以后,匹配唯一;
        return $(uniq(this.concat($(selector,context))))
    },
    //当前元素的第一个是否匹配选择符;
    is: function(selector){
        return this.length > 0 && zepto.matches(this[0], selector)
    },
    //not的效率挺低的;
    not: function(selector){
        var nodes=[];
        //如果selector是函数
        if (isFunction(selector) && selector.call !== undefined)
            this.each(function(idx){
                if (!selector.call(this,idx)) nodes.push(this)
            })
        else {
            //如果是字符串就过滤当前匹配的到数组
            var excludes = typeof selector == 'string' ? this.filter(selector) :
                //如果是类数组而且有item属性,说明当前元素是HTMLELEMENTS,或者是NODES就转化成纯数组
                //剩下的所有方式 new 一个zepto对象;
                (likeArray(selector) && isFunction(selector.item)) ? slice.call(selector) : $(selector)
            //重新迭代当前的元素, 不在excludes里面的push到 nodes的结果集;
            this.forEach(function(el){
                if (excludes.indexOf(el) < 0) nodes.push(el)
            })
        }
        return $(nodes)
    },
    //如果传的是对象的话, 把this里面所有包含selector的元素找出来,
    //有点象filter...不过has是对当前的元素进行操作的, filter是对当前元素的子元素进行操作的;
    has: function(selector){
        return this.filter(function(){
            return isObject(selector) ?
                //一种是contains的意思
                $.contains(this, selector) :
                //如果是字符串就是找所有的子孙元素的长度
                $(this).find(selector).size()
        })
    },
    //
    eq: function(idx){
        return idx === -1 ? this.slice(idx) : this.slice(idx, + idx + 1)
    },
    first: function(){
        var el = this[0]
        return el && !isObject(el) ? el : $(el)
    },
    last: function(){
        var el = this[this.length - 1]
        return el && !isObject(el) ? el : $(el)
    },

    find: function(selector){
        var result, $this = this
        //连选择器都没有, 那就不给你result了;
        if (!selector) result = []
        else if (typeof selector == 'object')
        //从当前元素中选择出所有selector到的元素的交集;
        //套了一堆循环,没有神马用感觉;
            result = $(selector).filter(function(){
                var node = this
                return emptyArray.some.call($this, function(parent){
                    return $.contains(parent, node)
                })
            });
        //如果只有一个,就返回一个zepto对象
        else if (this.length == 1) result = $(zepto.qsa(this[0], selector))
        //否则返回一个数组
        else result = this.map(function(){ return zepto.qsa(this, selector) })
        return result
    },
    //没看懂,是我的话我就直接跑parentNode.. 这个context哪来干嘛用..
    closest: function(selector, context){
        //如果context没有值, selector为字符串
        var node = this[0], collection = false
        if (typeof selector == 'object') collection = $(selector)
        //collection值是false的话,就zepto.matches(node ,selector)没匹配到就往里面走, 有匹配到的话就不往里面走...
        while (node && !(collection ? collection.indexOf(node) >= 0 : zepto.matches(node, selector)))
            node = node !== context && !isDocument(node) && node.parentNode
        return $(node)
    },
    parents: function(selector){
        var ancestors = [], nodes = this
        while (nodes.length > 0)
            nodes = $.map(nodes, function(node){
                //让node成为node父级, 不是document, 在结果集里面没有node,就把它存入结果集;
                if ((node = node.parentNode) && !isDocument(node) && ancestors.indexOf(node) < 0) {
                    ancestors.push(node)
                    return node
                }
            });
        //把结果集过滤出匹配selector的元素;
        return filtered(ancestors, selector)
    },
    parent: function(selector){
        //this.pluck('parentNode')的所有parentNode,取唯一 匹配selector,用的到吗, 这么多
        return filtered(uniq(this.pluck('parentNode')), selector)
    },
    children: function(selector){
        return filtered(this.map(function(){ return children(this) }), selector)
        //return filtered( 把所有的选中的元素的子元素拉到数组 , 匹配选择器 )
    },
    contents: function() {
        //把所有选中元素的所有都内容取出来,包含“节点”或者是“换行”节点等等;
        return this.map(function() { return slice.call(this.childNodes) })
    },
    siblings: function(selector){
        //如果没有selector就是匹配所有当前元素的兄弟元素
        return filtered(this.map(function(i, el){
            //把所有的元素的parentNode的children取出来,过滤掉不是当前的资源税
            return filter.call(children(el.parentNode), function(child){ return child!==el })
        }), selector) //通过选择器选中;
    },
    //把内容清空;
    empty: function(){
        return this.each(function(){ this.innerHTML = '' })
    },
    // `pluck` is borrowed from Prototype.js
    //和underscore一样的,抄自prototype;
    pluck: function(property){
        return $.map(this, function(el){ return el[property] })
    },
    show: function(){
        return this.each(function(){
            //先直接把display清空
            this.style.display == "none" && (this.style.display = '')
            //为了以防万一,他的值还没改;
            if (getComputedStyle(this, '').getPropertyValue("display") == "none")
            //显示默认的display值;
                this.style.display = defaultDisplay(this.nodeName)
        })
    },
    //这之前加一堆东西,然后删除自己;
    replaceWith: function(newContent){
        return this.before(newContent).remove()
    },
    //DOM方法还没结束啊,这个看完去复习jQuery,然后去看angular;一步一步来吧,进步太慢了;
    wrap: function(structure){
        var func = isFunction(structure)
        if (this[0] && !func)
            var dom   = $(structure).get(0),
                clone = dom.parentNode || this.length > 1

        return this.each(function(index){
            $(this).wrapAll(
                func ? structure.call(this, index) :
                    clone ? dom.cloneNode(true) : dom
            )
        })
    },

    //这个只对第一个元素进行操作,dom修改;
    wrapAll: function(structure){
        if (this[0]) {
            $(this[0]).before(structure = $(structure))
            var children
            // drill down to the inmost element
            while ((children = structure.children()).length) structure = children.first()
            $(structure).append(this)
        }
        return this
    },
    wrapInner: function(structure){
        var func = isFunction(structure)
        return this.each(function(index){
            //保存当前元素;
            //保存所有当前节点;
            var self = $(this), contents = self.contents(),
            //structure可能是字符串,但是没事的,wrapAll里面会进行处理;
                dom  = func ? structure.call(this, index) : structure;
            //避免出错吧;
            contents.length ? contents.wrapAll(dom) : self.append(dom)
        });
        //TODO  如果参数的 structure是一个DOM节点呢, 这个节点并不会被复制哦,
    },
    //就是把这个元素的父级删掉么么哒;
    unwrap: function(){
        this.parent().each(function(){
            $(this).replaceWith($(this).children())
        })
        return this
    },
    //这个是复制事件和子元素的
    clone: function(){
        return this.map(function(){ return this.cloneNode(true) })
    },

    hide: function(){
        return this.css("display", "none")
    },
    toggle: function(setting){
        //迭代元素;
        return this.each(function(){
            var el = $(this)
            //  setting === undefined ? el.css("display") == "none" : setting 是none就show 不是none就undefined ,undefined又走hide
            //  批语:没事瞎JB绕
                ;(setting === undefined ? el.css("display") == "none" : setting) ? el.show() : el.hide()
        })
    },

    //把所有选中的元素额上个元素匹配出来到一个数组里面去;
    prev: function(selector){ return $(this.pluck('previousElementSibling')).filter(selector || '*') },
    next: function(selector){ return $(this.pluck('nextElementSibling')).filter(selector || '*') },
    html: function(html){
        return 0 in arguments ?
            this.each(function(idx){
                var originHtml = this.innerHTML;
                /*我擦
                 function funcArg(context, arg, idx, payload) {
                 return isFunction(arg) ? arg.call(context, idx, payload) : arg
                 }
                 */
                //这边做了处理,如果 html是function 就执行function, 传一个index和originHtml;
                $(this).empty().append( funcArg(this, html, idx, originHtml) )
                //$(this).empty().append( html ),这样不行吗;
            }) :
            //返回第一个元素的innerHTML
            (0 in this ? this[0].innerHTML : null)
    },
    text: function(text){
        return 0 in arguments ?
            this.each(function(idx){
                /*
                 function funcArg(context, arg, idx, payload) {
                 return isFunction(arg) ? arg.call(context, idx, payload) : arg
                 }
                 一般来说,只要arg不是function类型都跟么走一样样的
                 */
                var newText = funcArg(this, text, idx, this.textContent)
                this.textContent = newText == null ? '' : ''+newText
            }) :
            (0 in this ? this[0].textContent : null)
    },

    //到达属性模块;
    //自定义
    attr: function(name, value){
        var result
        return (typeof name == 'string' && !(1 in arguments)) ?
            //判断元素是否是节点元素
            (!this.length || this[0].nodeType !== 1 ? undefined :
                //获取属性
                (!(result = this[0].getAttribute(name)) && name in this[0]) ? this[0][name] : result
                ) :
            //设置属性
            this.each(function(idx){
                if (this.nodeType !== 1) return
                if (isObject(name)) for (key in name) setAttribute(this, key, name[key])
                else setAttribute(this, name, funcArg(this, value, idx, this.getAttribute(name)))
            })
    },
    //走设置自定义属性,不给值;
    removeAttr: function(name){
        return this.each(function(){ this.nodeType === 1 && setAttribute(this, name) })
    },
    //节点属性
    prop: function(name, value){
        name = propMap[name] || name
        return (1 in arguments) ?
            this.each(function(idx){
                this[name] = funcArg(this, value, idx, this[name])
            }) :
            (this[0] && this[0][name])
    },
    //jQuery为了让库代码更节俭通过access跑属性方法,zepto更加直接
    //jQuery的data为放在缓存里面的;
    data: function(name, value){
        //"大写字母" ==>> 变成 ==> "-大写字母", 在变成小写
        var attrName = 'data-' + name.replace(capitalRE, '-$1').toLowerCase()

        var data = (1 in arguments) ?
            this.attr(attrName, value) :
            this.attr(attrName)

        //返回数据,
        return data !== null ? deserializeValue(data) : undefined
    },
    val: function(value){
        return 0 in arguments ?
            this.each(function(idx){
                //设置
                this.value = funcArg(this, value, idx, this.value)
            }) :
            //返回值 如果元素是select 就把选中的元素过滤出来, 并获取value;
            (this[0] && (this[0].multiple ?
                $(this[0]).find('option').filter(function(){ return this.selected }).pluck('value') :
                //直接返回值,话说这东西的确没有兼容问题么么哒
                this[0].value)
                )
    },
    //coordinates : 协调
    //知识点:因为relative是相对定位的,不知道父级是绝对定位还是正常的,所以通过getBoundRClientRect获取父级的位置
    //把值给界面的绝对定位值, 让元素根据父级相对定位;
    //(为什么这么做),如果是让他绝对定位的话,这个元素会受到所有父级的影响, 所以不要设置绝对定位最好(就减少了JS的值计算),
    //让他相对父级进行值计算, 根据界面定位;
    //启发:如果界面有太对的absolute,界面位置的可通性就太差了,只要设置相对定位,根据父级计算left,和top;也是极好的;
    //知识点1:getBoundRClientRect是的获取的top是包含margin值的值(总体的说就是相对界面(html)的位置);
    offset: function(coordinates){
        // coordinates 是一个方法 或者是一个 对象;
        // coordinates 的值是这个object相对页面的left和top, zepto会把obj相对父级元素定位;
        if (coordinates) return this.each(function(index){
            var $this = $(this),
                coords = funcArg(this, coordinates, index, $this.offset()),
            //relative是相对父级进行定位的;
            //parentOffse也是相对界面定位的, 所以没有什么问题的
                parentOffset = $this.offsetParent().offset(),
                props = {
                    top:  coords.top  - parentOffset.top,
                    left: coords.left - parentOffset.left
                }

            if ($this.css('position') == 'static') props['position'] = 'relative'
            $this.css(props)
        })
        if (!this.length) return null
        var obj = this[0].getBoundingClientRect()
        return {
            left: obj.left + window.pageXOffset,
            top: obj.top + window.pageYOffset,
            width: Math.round(obj.width),
            height: Math.round(obj.height)
        }
    },

    css: function(property, value){
        //就是length就只有1个,获取属性;
        if (arguments.length < 2) {
            var element = this[0], computedStyle = getComputedStyle(element, '')
            if(!element) return
            if (typeof property == 'string')
            //如果有行内样式就快点返回行内样式(!important怎么办), 否则通过getPropertyValue获取
                return element.style[camelize(property)] || computedStyle.getPropertyValue(property)
            else if (isArray(property)) {
                //如果想要获取一对属性
                var props = {}
                $.each(isArray(property) ? property: [property], function(_, prop){
                    props[prop] = (element.style[camelize(prop)] || computedStyle.getPropertyValue(prop))
                })
                return props
            }
        }

        var css = ''
        if (type(property) == 'string') {
            if (!value && value !== 0)
            //删除属性
                this.each(function(){ this.style.removeProperty(dasherize(property)) })
            else
            //设置
                css = dasherize(property) + ":" + maybeAddPx(property, value)
        } else {
            //是对象的话;
            for (key in property)
                if (!property[key] && property[key] !== 0)
                    this.each(function(){ this.style.removeProperty(dasherize(key)) })
                else
                    css += dasherize(key) + ':' + maybeAddPx(key, property[key]) + ';'
        };
        return this.each(function(){ this.style.cssText += ';' + css })
    },
    //获取当前相对父级的index或者传进来的元素的index;
    index: function(element){
        return element ? this.indexOf($(element)[0]) : this.parent().children().indexOf(this[0])
    },
    //
    hasClass: function(name){
        if (!name) return false
        // Array.some的第二个参数为里面的this;
        return emptyArray.some.call(this, function(el){
            //直接把 正则作为this了,我勒个去;
            return this.test(className(el));
        }, classRE(name));
    },

    addClass: function(name){
        if (!name) return this
        return this.each(function(idx){
            //迭代this元素
            classList = []
            var cls = className(this), newName = funcArg(this, name, idx, cls)
            newName.split(/\s+/g).forEach(function(klass){
                //把所有传进来的class通过空格分开;
                //把所有的class保存到数组里面;
                if (!$(this).hasClass(klass)) classList.push(klass)
            }, this/*这个this为上下文*/);
            //把元素的新的class和原来的class拼合起来再赋值;
            classList.length && className(this, cls + (cls ? " " : "") + classList.join(" "))
        })
    },
    removeClass: function(name){
        return this.each(function(idx){
            //如果没有传值就把所有的class清空;
            if (name === undefined) return className(this, '')
            classList = className(this)
            //传进来的可能是函数, 把class结果获取出来;
            funcArg(this, name, idx, classList).split(/\s+/g).forEach(function(klass){
                //生成动态正则匹配替换成空;
                classList = classList.replace(classRE(klass), " ")
            });
            //trim, 去除两边的空格;
            className(this, classList.trim())
        })
    },
    toggleClass: function(name, when){
        if (!name) return this
        return this.each(function(idx){
            var $this = $(this),
            //因为这些都是迭代每一个元素, 所以获取设置的class还是要放在里面比较好;
                names = funcArg(this, name, idx, className(this));
            names.split(/\s+/g).forEach(function(klass){
                (when === undefined ? !$this.hasClass(klass) : when) ?
                    $this.addClass(klass) : $this.removeClass(klass)
                // $this.hasClass( klass ) ? $this.removeClass(klass) : $this.addClass( klass );
                /*三目的写法 ( 三目的写法不同, 意义也是不相同的 );
                 一:
                 yes ? a :
                 yes1 ? b :
                 yes2 ? c :
                 yes3 ? d : default;
                 === if( yes ) {
                 a
                 }else if( yes1 ) {
                 b
                 }else if( yes2 ) {
                 c
                 }else if( yes3 ) {
                 d
                 };
                 二:
                 ( yes ? a : b ) ?  c : d
                 ====
                 var bVal;
                 if( yes ) {
                 temp = a;
                 }else{
                 temp = b;
                 };
                 if( bVal ) {
                 c;
                 }else{
                 d
                 }
                 */
            });
        });
    },
    scrollTop: function(value){
        if (!this.length) return
        var hasScrollTop = 'scrollTop' in this[0]
        //获取的话直接返回scrollTop, 如果当前元素没有滚动条, 就返回相对整个界面的pageYOffset;
        if (value === undefined) return hasScrollTop ? this[0].scrollTop : this[0].pageYOffset
        return this.each(hasScrollTop ?
            //当前元素有滚动高度, 就直接设置,
            //如果没有滚动高度, 就设置为整个界面的滚动高度;
            function(){ this.scrollTop = value } :
            function(){ this.scrollTo(this.scrollX, value) })
    },
    scrollLeft: function(value){
        if (!this.length) return
        var hasScrollLeft = 'scrollLeft' in this[0]
        if (value === undefined) return hasScrollLeft ? this[0].scrollLeft : this[0].pageXOffset
        return this.each(hasScrollLeft ?
            function(){ this.scrollLeft = value } :
            function(){ this.scrollTo(value, this.scrollY) })
    },
    position: function() {
        if (!this.length) return

        var elem = this[0],
        // Get *real* offsetParent //这个元素一定是相对定位 “relative”或者是“absolute”定位的;
            offsetParent = this.offsetParent(),
        // Get correct offsets
        //offset是相对整个文档界面的left和top, 以及width和height;
            offset       = this.offset(),
        //父级的相对HTML的offset(left, top, height, width);
        //rootNodeRE是指BODY或者是HTML元素;
            parentOffset = rootNodeRE.test(offsetParent[0].nodeName) ? { top: 0, left: 0 } : offsetParent.offset()

        // Subtract element margins
        // note: when an element has margin: auto the offsetLeft and marginLeft
        // are the same in Safari causing offset.left to incorrectly be 0
        //如果这个元素的margin-top是正的无限大,那么offset.top也是正的无限大, 是相对的;
        //这个获取的offset是相对上一个相对或者绝对定位的位置  ;  这个offset值是包含margin的所以要把margin减去;
        //知识点1: nodes[0].offsetLeft || nodes[0].offsetTop是包含margin的,从元素的 border开始(居然忘记了);
        //知识点2: absolute或者relative的定位是从contentBox开始的
        //而zepto的offset()是相对界面的left,和top, 最后的值要是元素的margin到上一个定位元素的contentBox(标准定义也是这样的);
        offset.top  -= parseFloat( $(elem).css('margin-top') ) || 0
        offset.left -= parseFloat( $(elem).css('margin-left') ) || 0

        // Add offsetParent borders
        parentOffset.top  += parseFloat( $(offsetParent[0]).css('border-top-width') ) || 0
        parentOffset.left += parseFloat( $(offsetParent[0]).css('border-left-width') ) || 0

        // Subtract the two offsets
        return {
            //offset.top - parentOffset.left - el.margin-top - parentOffset.border-left-width;
            top:  offset.top  - parentOffset.top,
            left: offset.left - parentOffset.left
        };
        //评论;因为平台兼容问题,position根据标准等问题;直接把获取当前元素和父级元素的offset;
        //==> el.offset.top - parent.offset.top - el.style.marginTop - parent.style.borderTop;
        //TODO这个position为什么不通过el.css("position")进行获取呢?
    },
    offsetParent: function() {
        return this.map(function(){
            var parent = this.offsetParent || document.body;
            //存在这个parent元素, 不是documentElement( html节点 ) 而且这个元素的样式"position"值不为"static";
            /*<!--
             TODO : 可能存在一个元素的offsetParent的position值为static?
             -->*/
            while (parent && !rootNodeRE.test(parent.nodeName) && $(parent).css("position") == "static")
                parent = parent.offsetParent;

            return parent
        })
    }
}

// for now
$.fn.detach = $.fn.remove
    /*
     //不包含滚动条和边框的宽度;
     window.innerWidth
     //包含滚动条和边框;
     window.outerWidth
     window.innerHeight
     window.outerHeight
     document.documentElement.clientHeight
     //卧槽,这个比window.innerWidth少了17px..
     document.documentElement.clientWidth
     document.documentElement.scrollWidth
     document.documentElement.scrollTop
     document.documentElement.scrollHeight
     */
// Generate the `width` and `height` functions
;['width', 'height'].forEach(function(dimension){
    //把第一个字符变成大写的给dimensionProperty;
    var dimensionProperty =
        dimension.replace(/./, function(m){ return m[0].toUpperCase() })

    $.fn[dimension] = function(value){
        var offset, el = this[0]
        //对window和document和其他节点元素分别处理;

        //如果是window就直接返回window.innerWidth
        if (value === undefined) return isWindow(el) ? el['inner' + dimensionProperty] :
            isDocument(el) ? el.documentElement['scroll' + dimensionProperty] :
                //通过offset()获取的值返回;
                (offset = this.offset()) && offset[dimension];

        //设置值
        else return this.each(function(idx){
            el = $(this)
            el.css(dimension, funcArg(this, value, idx, el[dimension]()))
        });
    };
});

//迭代node的所有子元素
function traverseNode(node, fun) {
    fun(node)
    //node的childNodes时包含空节点的;
    for (var i = 0, len = node.childNodes.length; i < len; i++)
        traverseNode(node.childNodes[i], fun)
    //如果是我写的话,我会这样;
    /*
     if( node.childNodes.length ) {
     for (var i = 0, len = node.childNodes.length; i < len; i++);
     traverseNode(node.childNodes[i], fun);
     }
     */
}

// Generate the `after`, `prepend`, `before`, `append`,
// `insertAfter`, `insertBefore`, `appendTo`, and `prependTo` methods.
// adjacencyOperators = [ 'after', 'prepend', 'before', 'append' ];
adjacencyOperators.forEach(function(operator, operatorIndex) {
    /*
     0%2
     ==>>0
     1%2
     ==>>1
     2%2
     ==>>0
     3%2
     ==>>1
     */
    var inside = operatorIndex % 2 //=> prepend, append

    $.fn[operator] = function(){
        // arguments can be nodes, arrays of nodes, Zepto objects and HTML strings
        var argType,
        /*
         把传的参数调整一下, 是字符串就转化成节点;
         */
            nodes = $.map(arguments, function(arg) {
                argType = type(arg)
                return argType == "object" || argType == "array" || arg == null ?
                    arg : zepto.fragment(arg)
            }),
            parent,
        //如果当前选中的元素有多个, 就把传的参数进行复制;
            copyByClone = this.length > 1
        //没参数进来就跳走;
        if (nodes.length < 1) return this

        return this.each(function(_, target){
            //如果是append或者是prepend那么parent就改成targetparent,否则parent就不要变了就是this;
            parent = inside ? target : target.parentNode

            //convert all methods to a "before" operation
            //  [ 'after', 'prepend', 'before', 'append' ];
            target = operatorIndex == 0 ? target.nextSibling :
                operatorIndex == 1 ? target.firstChild :
                    operatorIndex == 2 ? target :
                        null

            //只要是包含都是true值;
            var parentInDocument = $.contains(document.documentElement, parent);

            //把所有传进来的node跑一遍;
            nodes.forEach(function(node){
                //基础: if( a ){ console.log( a ) }else if( a )console.log(a)  //true 就一个;
                if (copyByClone) node = node.cloneNode(true)
                else if (!parent) return $(node).remove()

                //如果 operator符是after ==>> parent为targer.parentNode; target为 target.nextElementSibling;
                parent.insertBefore(node, target);
                //TODO, 不能 traverseNode parent或者是target, 必须traverseNode node才行, 把node里面的script标签执行;
                if (parentInDocument) traverseNode(node, function(el){
                    //判断方法;
                    if (el.nodeName != null && el.nodeName.toUpperCase() === 'SCRIPT' &&
                        (!el.type || el.type === 'text/javascript') && !el.src)
                    //全局eval跑javascirpt代码;
                        window['eval'].call(window, el.innerHTML)
                })
            })
        })
    }

    // after    => insertAfter
    // prepend  => prependTo
    // before   => insertBefore
    // append   => appendTo
    //..这个看了能不晕吗..逻辑就是把传进来的html作为相对的节点; this为参数重新传过去;
    $.fn[inside ? operator+'To' : 'insert'+(operatorIndex ? 'Before' : 'After')] = function(html){
        $(html)[operator](this)
        return this
    }
})

zepto.Z.prototype = $.fn

// Export internal API functions in the `$.zepto` namespace
zepto.uniq = uniq
zepto.deserializeValue = deserializeValue
$.zepto = zepto;

window.Zepto = Zepto
window.$ === undefined && (window.$ = Zepto)

//到达事件模块;
;(function($){
    var _zid = 1, undefined,
        slice = Array.prototype.slice,
        isFunction = $.isFunction,
        isString = function(obj){ return typeof obj == 'string' },
    //保存所有元素对应的事件列表;
        handlers = {},
        specialEvents={
            "click" : "MouseEvents",
            "mousedown" : "MouseEvents",
            "mouseup" : "MouseEvents",
            "mousemove" : "MouseEvents"
        },
        focusinSupported = 'onfocusin' in window,
        focus = { focus: 'focusin', blur: 'focusout' },
        hover = { mouseenter: 'mouseover', mouseleave: 'mouseout' };

    specialEvents.click = specialEvents.mousedown = specialEvents.mouseup = specialEvents.mousemove = 'MouseEvents'

    //保存一个元素的el;
    function zid(element) {
        return element._zid || (element._zid = _zid++)
    };

    //迭代寻找handler;
    //在el对应的zid, 在handlers里面, 通过event, 或者fn, 或者selector 匹配到所有的对应函数;
    function findHandlers(element, event, fn, selector) {
        event = parse(event)
        if (event.ns) var matcher = matcherFor(event.ns)

        //过滤所有的合适的handlers;
        return (handlers[zid(element)] || []).filter(function(handler) {
            return handler //handler前提要存在
                && (!event.e  || handler.e == event.e) //没有event.e就走下一个, 有event.e的话event.e要等于 handler.e;
                && (!event.ns || matcher.test(handler.ns)) //没有event.ns就走下一个, 有event.ns的话event.ns要等于 hanler.ns;
                && (!fn       || zid(handler.fn) === zid(fn)) //没有fn就走下一个, 有fn的话fn.zid要等于 handler.fn.zid;
                && (!selector || handler.sel == selector) //没有selector就走下一个, 有selector的话selector要等于 handler.sel;
        })
    };

    function parse(event) {
        //返回 一个对象 这个对象包含 ev和 ns 命名空间;
        var parts = ('' + event).split('.')
        return {e: parts[0], ns: parts.slice(1).sort().join(' ')}
    };

    //匹配正则,  开头或者空格 或者是 结尾或者空格的字符串;
    function matcherFor(ns) {
        return new RegExp('(?:^| )' + ns.replace(' ', ' .* ?') + '(?: |$)')
    };

    function eventCapture(handler, captureSetting) {
        //存在事件代理;
        return handler.del &&
            //冒泡的focusein不支持  //事件是focus或者blur;
            (!focusinSupported && (handler.e in focus)) ||
            //或者接着 去captureSetting的布尔值;
            !!captureSetting
    };

    //mouse事件的替换; focusinSupported;
    function realEvent(type) {
        return hover[type] || (focusinSupported && focus[type]) || type
    };

    //zip是正常的绑定事件, 只是对事件兼容进行了处理, 所有保存的事件在handlers下都可以找到:
    //$("body").bind("click",function(){console.log(1)});
    //那么 data, selector delegator capture的值全为undefined
    function add(element, events, fn, data, selector, delegator, capture) {
        //handlers保存在内部变量, 保存每一个element对应的zid的 handlers, 以后可以找到这个handlers的handler进行操作;
        var id = zid(element), set = (handlers[id] || (handlers[id] = []))
        events.split(/\s/).forEach(function(event){
            //如果是函数,就把fn放到DOM加载完毕以后执行;
            if (event == 'ready') return $(document).ready(fn);
            //Object {e: "click", ns: ""} 这个是parse以后的event对象;
            var handler   = parse(event)
            handler.fn    = fn
            handler.sel   = selector
            //对fn进行重写;
            // emulate mouseenter, mouseleave
            if (handler.e in hover) fn = function(e){
                var related = e.relatedTarget
                if (!related || (related !== this && !$.contains(this, related)))
                    return handler.fn.apply(this, arguments)
            }
            handler.del   = delegator;
            //设置回调, delegator的 回调对象优先, fn这个对象的优先级相对较低;
            var callback  = delegator || fn;
            //这个就是元素绑定的事件;
            handler.proxy = function(e) {
                //对事件对象进行兼容处理;
                //如果compatible就传一个(e), 那么compatible就返回这个e, 没有任何改变;
                e = compatible(e);
                //isImmediatePropagationStopped都支持的吗?;
                if (e.isImmediatePropagationStopped()) return;
                e.data = data
                //通过这个桥接 执行回调, 回调的上下文为element; _args是什么鸟东西;
                var result = callback.apply(element, e._args == undefined ? [e] : [e].concat(e._args));
                //如果这个返回值是false就执行取消默认事件和事件冒泡, 和jQ一样样的;
                if (result === false) e.preventDefault(), e.stopPropagation();
                //这个返回有什么用..个人认为这个是习惯性返回;
                return result;
            };
            //handler.i为当前的length值,就是该元素对应的索引值;
            handler.i = set.length;
            /*
             {
             del: undefined, //
             e: "click",
             ns: "",
             fn: function (){console.log(1)},
             i: 0,
             proxy: function (e){}
             */
            set.push(handler);
            if ('addEventListener' in element)
            //realEvent(handler.e), 因为可能有一些事件不支持,对事件进行兼容处理hover[type] || (focusinSupported && focus[type]) || type
                element.addEventListener(realEvent(handler.e), handler.proxy/*这个是hanler的引用,如果要修改handler.proxy也很简单*/, eventCapture(handler, capture))
        });
    };

    function remove(element, events, fn, selector, capture){
        var id = zid(element)
            ;(events || '').split(/\s/).forEach(function(event){
            //就是通过event或者fn或者是selector寻找handler,
            //只要handler找到了, 绑定的函数的详细信息就找到了;
            findHandlers(element, event, fn, selector).forEach(function(handler){
                // handlers[id]是所有事件的数组; handler.i是当前数组的index;
                delete handlers[id][handler.i]
                //因为所有的事件都是保存在handlers[zid]里面, 可以很快的通过"event或者fn以及selector"找到需要的信息,再进行removeEventListener;
                if ('removeEventListener' in element)
                    element.removeEventListener(realEvent(handler.e), handler.proxy, eventCapture(handler, capture))
            });
        });
    };

    //可以直接通过方法进行调用;
    $.event = { add: add, remove: remove };

    //改变文件的上下文;
    $.proxy = function(fn, context) {
        //保存第二个开始的所有参数;
        var args = (2 in arguments) && slice.call(arguments, 2)
        if (isFunction(fn)) {

            var proxyFn = function(){
                return fn.apply( context/*上下文*/, args /*有参数的话就concat*/? args.concat(slice.call(arguments)) : arguments );
            };
            //为proxy设置_zid;
            proxyFn._zid = zid(fn);
            return proxyFn;
        } else if (isString(context)) {
            if ( args ) {
                //修正args参数
                args.unshift(fn[context], fn)
                //这个相当于 $.proxy( Array.prototype.slice.call(args) );
                return $.proxy.apply(null, args)
            } else {
                //用fn[context]执行 fn;
                return $.proxy(fn[context], fn)
            }
        } else {
            throw new TypeError("expected function")
        }
    }

    //bind和on一摸一样
    $.fn.bind = function(event, data, callback){
        return this.on(event, data, callback)
    };

    //unbind和off一摸一样;
    $.fn.unbind = function(event, callback){
        return this.off(event, callback)
    };

    $.fn.one = function(event, selector, data, callback){
        return this.on(event, selector, data, callback, 1)
    };

    var returnTrue = function(){return true},
        returnFalse = function(){return false},
        ignoreProperties = /^([A-Z]|returnValue$|layer[XY]$)/,
        eventMethods = {
            preventDefault: 'isDefaultPrevented',
            stopImmediatePropagation: 'isImmediatePropagationStopped',
            stopPropagation: 'isPropagationStopped'
        };

    //event为新的事件对象 后者event不支持isXXXX属性的话;
    function compatible(event, source) {
        //事件不支持isDefaultPrevented这个方法的话;
        //这样说明event对象也不支持isImmediatePropagationStopped和isPropagationStopped;
        if (source || !event.isDefaultPrevented) { //source有的话就是有, source没有的话把event给source;
            source || (source = event);

            $.each(eventMethods, function(name, predicate) {
                //保存原来的方法(//preventDefault //stopImmediatePropagation //stopPropagation);
                var sourceMethod = source[name];
                event[name] = function() {
                    //设置为真值;
                    this[predicate] = returnTrue;
                    //
                    return sourceMethod && sourceMethod.apply(source, arguments);
                };
                //手动设置(//isDefaultPrevented //isImmediatePropagationStopped //isPropagationStopped);
                event[predicate] = returnFalse;
            });
            /*
             函数的重载(个人认为么么哒);
             function wrapFn(target, another) {
             var temp = target;
             target = function() {
             temp.apply(temp, arguments);
             another();
             };
             return target;
             };
             var fn = function() {};
             fn = wrapFn( fn , fn1);
             fn();
             */
            //
            //event.defaultPrevented //==>> https://developer.mozilla.org/en-US/docs/Web/API/event.defaultPrevented
            //Summary
            //Returns a boolean indicating whether or not event.preventDefault() was called on the event.
            //Note: You should use this instead of the non-standard, deprecated getPreventDefault() method (see bug 691151).

            if (source.defaultPrevented !== undefined ? source.defaultPrevented : //如果事件的source.defaultPrevented不是undefined的话returnValue;
                'returnValue' in source ? source.returnValue === false : //如果是IE的事件机制.returnValue 是false的话走进去;
                    source.getPreventDefault && source.getPreventDefault()) //默认事件是否被取消默认事件的兼容处理;
                event.isDefaultPrevented = returnTrue;
        };
        return event;
    };

    //新建event;
    function createProxy(event) {
        var key, proxy = { originalEvent: event }
        for (key in event)
            // ignoreProperties = /^([A-Z]|returnValue$|layer[XY]$)/, 为什么要避免returnValue和 layerX和 layerY呢;
            if (!ignoreProperties.test(key) && event[key] !== undefined) proxy[key] = event[key] //复制事件对象;

        //处理事件对象的兼容问题;
        return compatible(proxy, event)
    };

    $.fn.delegate = function(selector, event, callback){
        return this.on(event, selector, callback)
    };

    $.fn.undelegate = function(selector, event, callback){
        return this.off(event, selector, callback)
    }

    //JQ高版本不存在live和 die方法了;
    $.fn.live = function(event, callback){
        $(document.body).delegate(this.selector, event, callback)
        return this
    }
    $.fn.die = function(event, callback){
        $(document.body).undelegate(this.selector, event, callback)
        return this
    }

    $.fn.on = function(event, selector, data, callback, one){
        var autoRemove, delegator, $this = this
        //如果事件不是字符串
        /*
         是这一种情况下 :
         {
         "click" : function() {},
         "touchend" : function() {}
         }
         */
        if (event && !isString(event)) {
            $.each(event, function(type, fn){
                $this.on(type, selector, data, fn, one)
            })
            return $this
        };
        //调整正确的参数

        //判断selector不是正确的参数,把selector设置为undefined
        if (!isString(selector) && !isFunction(callback) && callback !== false)
            callback = data, data = selector, selector = undefined
        //判断data是function,把data设置为undefined
        if (isFunction(data) || data === false)
            callback = data, data = undefined

        if (callback === false) callback = returnFalse

        //对当前的所有元素进行迭代;
        return $this.each(function(_, element){
            //只执行一次的话;
            if (one) autoRemove = function(e){
                //清除当前元素的事件;
                remove(element, e.type, callback)
                return callback.apply(this, arguments)
            };

            //如果有事件代理的话
            if (selector) delegator = function(e){
                //对e.target匹配的最近的selector;
                var evt, match = $(e.target).closest(selector, element).get(0);
                //match还能match到element..
                if (match && match !== element) {
                    //对事件进行添加属性;
                    evt = $.extend(createProxy(e), {currentTarget: match/*target就是这个了*/, liveFired: element});//liveFired为绑定的element
                    //对函数进行重载;
                    return (autoRemove || callback).apply(match, [evt].concat(slice.call(arguments, 1)))
                };
            };

            add(element, event, callback, data, selector, delegator || autoRemove)
        });
    };

    $.fn.off = function(event, selector, callback){
        var $this = this
        if (event && !isString(event)) {
            //对对象进行处理, 加载自己;
            $.each(event, function(type, fn){
                $this.off(type, selector, fn)
            })
            return $this
        };

        //对参数进行处理;
        if (!isString(selector) && !isFunction(callback) && callback !== false)
            callback = selector, selector = undefined

        if (callback === false) callback = returnFalse

        //
        return $this.each(function(){
            remove(this, event, callback, selector)
        });
    };

    $.fn.trigger = function(event, args){
        event = (isString(event) ||
            //如果是空对象就新建一个事件对象, 否则就对这个对象进行兼容处理;
            $.isPlainObject(event))  ?
            $.Event(event) : compatible(event)
        event._args = args
        //对每一个元素进行处理;
        return this.each(function(){
            // items in the collection might not be DOM elements
            if('dispatchEvent' in this) this.dispatchEvent(event)
            //手动触发事件;
            else $(this).triggerHandler(event, args)
        });
    };

    // triggers event handlers on current element just as if an event occurred, //触发让事件发生;
    // doesn't trigger an actual event, doesn't bubble 不会触发真正的事件, 不会事件冒泡
    $.fn.triggerHandler = function(event, args) {
        var e, result
        //每一个元素都进行处理;
        this.each(function(i, element){
            //新建新的event或者是直接用模拟的event触发事件;
            e = createProxy(isString(event)/*为什么传进来的会是字符串*/ ? $.Event(event) : event)
            e._args = args;
            e.target = element;
            //通过element的 event.type或者 event找到 事件函数, 直接执行hadler.proxy( e )// e为参数;
            $.each(findHandlers(element, event.type || event), function(i, handler){
                result = handler.proxy(e);
                if (e.isImmediatePropagationStopped()) return false;
            });
        });
        return result;
    };

    //使用快捷方法直接绑定到$.fn上面去;
    // shortcut methods for `.bind(event, fn)` for each event type
    ;('focusin focusout load resize scroll unload click dblclick '+
        'mousedown mouseup mousemove mouseover mouseout mouseenter mouseleave '+
        'change select keydown keypress keyup error').split(' ').forEach(function(event) {
            $.fn[event] = function(callback) {
                return callback ?
                    this.bind(event, callback) :
                    this.trigger(event)
            }
        })

    ;['focus', 'blur'].forEach(function(name) {
        $.fn[name] = function(callback) {
            if (callback) this.bind(name, callback)
            else this.each(function(){
                try { this[name]() }
                catch(e) {}
            })
            return this
        }
    })

    //新建事件模型;
    $.Event = function(type, props) {
        if (!isString(type)) props = type, type = props.type
        var event = document.createEvent(specialEvents[type] || 'Events'), bubbles = true
        if (props) for (var name in props) (name == 'bubbles') ? (bubbles = !!props[name]) : (event[name] = props[name])
        event.initEvent(type, bubbles, true)
        return compatible(event)
    }

})(Zepto);

;(function($){
    //jsonID一看就知道是递增的
    var jsonpID = 0,
    //为了浏览器更快的找到document,不必一层层往上最后在window下找到document
        document = window.document,
        key,
        name,
    //匹配闭合的<script>标签, as like <script src="1213123">sdfsdf</script>;
        rscript = /<script\b[^<]*(?:(?!<\/script>)<[^<]*)*<\/script>/gi,
    //匹配text/javascript或者application/javascript;
        scriptTypeRE = /^(?:text|application)\/javascript/i,
    //匹配text/xml 和 application/xml
        xmlTypeRE = /^(?:text|application)\/xml/i,
    //
        jsonType = 'application/json',
    //
        htmlType = 'text/html',
    //匹配所有空标签;
        blankRE = /^\s*$/

    // trigger a custom event and return false if it was cancelled
    function triggerAndReturn(context, eventName, data) {
        var event = $.Event(eventName)
        $(context).trigger(event, data)
        return !event.isDefaultPrevented()
    }

    // trigger an Ajax "global" event
    function triggerGlobal(settings, context, eventName, data) {
        if (settings.global) return triggerAndReturn(context || document, eventName, data)
    }

    // Number of active Ajax requests
    $.active = 0

    function ajaxStart(settings) {
        //如果设置里有global, 而且是第一次发送ajax, 就手动触发document的"ajaxStart";
        if (settings.global && $.active++ === 0) triggerGlobal(settings, null, 'ajaxStart')
    }
    function ajaxStop(settings) {
        //和上面的一模一样;
        if (settings.global && !(--$.active)) triggerGlobal(settings, null, 'ajaxStop')
    }

    // triggers an extra global event "ajaxBeforeSend" that's like "ajaxSend" but cancelable
    function ajaxBeforeSend(xhr, settings) {
        var context = settings.context
        //触发options里面的beforeSend自定义事件;
        if (settings.beforeSend.call(context, xhr, settings) === false ||
            //触发dcoument的ajaxBeforeSend事件,
            //或者是options.context的ajaxBeforeSend事件;
            triggerGlobal(settings, context, 'ajaxBeforeSend', [xhr, settings]) === false)
            return false;

        //触发document或者是指定上下文的"ajaxSend"事件;
        triggerGlobal(settings, context, 'ajaxSend', [xhr, settings])
    }
    function ajaxSuccess(data, xhr, settings, deferred) {
        var context = settings.context, status = 'success'
        settings.success.call(context, data, status, xhr)
        if (deferred) deferred.resolveWith(context, [data, status, xhr])
        triggerGlobal(settings, context, 'ajaxSuccess', [xhr, settings, data])
        ajaxComplete(status, xhr, settings);
    }
    // type: "timeout", "error", "abort", "parsererror"
    function ajaxError(error, type, xhr, settings, deferred) {
        var context = settings.context
        settings.error.call(context, xhr, type, error)
        if (deferred) deferred.rejectWith(context, [xhr, type, error])
        triggerGlobal(settings, context, 'ajaxError', [xhr, settings, error || type])
        ajaxComplete(type, xhr, settings)
    }
    // status: "success", "notmodified", "error", "timeout", "abort", "parsererror"
    function ajaxComplete(status, xhr, settings) {
        var context = settings.context
        settings.complete.call(context, xhr, status)
        triggerGlobal(settings, context, 'ajaxComplete', [xhr, settings])
        ajaxStop(settings)
    }

    // Empty function, used as default callback
    function empty() {}

    $.ajaxJSONP = function(options, deferred){
        //如果没有type就会走ajax的请求了;
        if (!('type' in options)) return $.ajax(options)

        //保存回调的设置;
        var _callbackName = options.jsonpCallback,
        //这个callback要是等到script加载完毕以后才执行的,现状可能没有这个函数
        //如果现在有回调,而且回调是函数 就立即执行
            callbackName = ($.isFunction(_callbackName) ?
                //_callbackName为假值(false,null,undefined,""..)的时候,回调执行返回为自己定义递增的回调名字;
                _callbackName() /*TODO:这个还要跑一下才行?*/ : _callbackName) || ('jsonp' + (++jsonpID)),
        //新建标签
            script = document.createElement('script'),
        //这个要保存当前的回调;
            originalCallback = window[callbackName],
            responseData,
        //取消的桥接(传送器);,超时("timeout")或者是错误("error")的时候触发的消息;
            abort = function(errorType) {
                $(script).triggerHandler('error', errorType || 'abort')
            },
            xhr = { abort: abort },
        //如果有传这个option.abortTimeout ,那么超时就取消;
            abortTimeout

        //TODO:为什么要把xhr放进去, xhr只是一个对象啊
        if (deferred) deferred.promise(xhr)

        //要先绑定事件, 绑定加载和失败事件
        $(script).on('load error', function(e, errorType){
            //取消setTimeout;
            clearTimeout(abortTimeout);

            //删除事件,从dom中删除;
            $(script).off().remove()

            if (e.type == 'error' || !responseData) {
                //统一的事件处理, 方便添加各种自定义的事件
                ajaxError(null, errorType || 'error', xhr, options, deferred)
            } else {
                //统一的事件处理, 方便添加各种自定义的事件
                ajaxSuccess(responseData[0], xhr, options, deferred)
            }

            //这个为什么用callback?为了思路更加清楚?才把callback保存起来,然后统一运行?
            //把回调重新赋值到window下面然后用callback跑起来;
            window[callbackName] = originalCallback
            if (responseData && $.isFunction(originalCallback))
                originalCallback(responseData[0])

            originalCallback = responseData = undefined
        });

        //执行自定义事件;
        if (ajaxBeforeSend(xhr, options) === false) {
            //事件执行的返回为false就会把执行中断;
            abort('abort')
            return xhr
        }
        //JSONP就是一个链接放到DOM中;服务器会把返回的数据放在请求的回调,让会让回调执行, 服务器不管本地是否有回调这个东西, 负责执行就好了;

        //覆盖(假冒)了当前的回调,把返回的结果保存起来了;
        window[callbackName] = function(){
            responseData = arguments
        };

        //  ?xx=? ==》》 ?xx=callbackName;
        //替换
        script.src = options.url.replace(/\?(.+)=\?/, '?$1=' + callbackName)

        //动态添加节点;
        document.head.appendChild(script)

        //如果有超时这个选项, 就启动一个定时器, 到时间了取消(abort);
        if (options.timeout > 0) abortTimeout = setTimeout(function(){
            abort('timeout')
        }, options.timeout)

        return xhr
    };

    //设置以后就都变成了全局变量了
    $.ajaxSettings = {
        // Default type of request
        type: 'GET',
        // Callback that is executed before request
        //这些一堆东西基本上都要设置;
        beforeSend: empty,
        // Callback that is executed if the request succeeds
        success: empty,
        // Callback that is executed the the server drops error
        error: empty,
        // Callback that is executed on request complete (both: error and success)
        complete: empty,
        // The context for the callbacks
        context: null,
        // Whether to trigger "global" Ajax events
        global: true,
        // Transport ,好屌的传送器, 只要这样就好了,没有任何兼容问题;
        xhr: function () {
            return new window.XMLHttpRequest()
        },
        // MIME types mapping
        // IIS returns Javascript as "application/x-javascript"
        accepts: {
            script: 'text/javascript, application/javascript, application/x-javascript',
            json:   jsonType,
            xml:    'application/xml, text/xml',
            html:   htmlType,
            text:   'text/plain'
        },
        // Whether the request is to another domain
        //$.ajaxSettings.crossDomain = true;jQuery也有这个东西, 打开默认的跨域ajax设置;
        crossDomain: false,
        // Default timeout
        timeout: 0,
        // Whether data should be serialized to string
        processData: true,
        // Whether the browser should be allowed to cache GET responses
        cache: true
    }

    function mimeToDataType(mime) {
        if (mime) mime = mime.split(';', 2)[0]
        return mime && ( mime == htmlType ? 'html' :
            mime == jsonType ? 'json' :
                scriptTypeRE.test(mime) ? 'script' :
                    xmlTypeRE.test(mime) && 'xml' ) || 'text'
    }

    function appendQuery(url, query) {
        if (query == '') return url
        return (url + '&' + query).replace(/[&?]{1,2}/, '?')
    }

    // serialize payload and append it to the URL for GET requests
    function serializeData(options) {
        //如果发送的数据是JOSON格式就序列化;
        if (options.processData && options.data && $.type(options.data) != "string")
            options.data = $.param(options.data, options.traditional)
        //默认的option.type如果被用户的type覆盖的话 , 或者type就是"get"就把option.data转成url请求的格式
        //xx.html?xx=11&yy=2&zz=3 这样的;
        if (options.data && (!options.type || options.type.toUpperCase() == 'GET'))
            options.url = appendQuery(options.url, options.data), options.data = undefined
    }

    //主流程;
    $.ajax = function(options){
        var settings = $.extend({}, options || {}),
            //如果有引用了Deferred延迟对象, 就会返回延迟对象;
            deferred = $.Deferred && $.Deferred();
        //把所有用户没有设置的默认设置复制到设置上面;
        for (key in $.ajaxSettings) if (settings[key] === undefined) settings[key] = $.ajaxSettings[key]

        //触发document上的ajaxStart事件;
        ajaxStart(settings)

        //中断检测是否跨域, 被设置settings.crossDomain这个属性;
        if (!settings.crossDomain) settings.crossDomain = /^([\w-]+:)?\/\/([^\/]+)/.test(settings.url) &&
            RegExp.$2 != window.location.host

        //
        if (!settings.url) settings.url = window.location.toString();

        //修正发送的数据;
        serializeData(settings);

        var dataType = settings.dataType,

            ///\?.+=\?/.test("http://ww.xx.com/?sdfsdf=?sdfs") ==>> ture;
            hasPlaceholder = /\?.+=\?/.test(settings.url)
        if (hasPlaceholder) dataType = 'jsonp'

        //是否添加时间戳;
        if (settings.cache === false || (
            (!options || options.cache !== true) &&
                ('script' == dataType || 'jsonp' == dataType)
            ))
            settings.url = appendQuery(settings.url, '_=' + Date.now())

        //如果是jsonp的话;
        if ('jsonp' == dataType) {
            //请求的地址没有回调参数的话, 要根据callback设定一个回调的名字;
            if (!hasPlaceholder)
                settings.url = appendQuery(settings.url,
                    settings.jsonp ? (settings.jsonp + '=?') : settings.jsonp === false ? '' : 'callback=?')
            return $.ajaxJSONP(settings, deferred)
        };

        /**
         * accepts: {
            script: 'text/javascript, application/javascript, application/x-javascript',
            json:   jsonType,
            xml:    'application/xml, text/xml',
            html:   htmlType,
            text:   'text/plain'
        */
        var mime = settings.accepts[dataType],
            headers = { },
            setHeader = function(name, value) { headers[name.toLowerCase()] = [name, value] },
            protocol = /^([\w-]+:)\/\//.test(settings.url) ? RegExp.$1 : window.location.protocol,
            xhr = settings.xhr(),
            nativeSetHeader = xhr.setRequestHeader,
            abortTimeout

        //JSONP也有这东西;
        if (deferred) deferred.promise(xhr)

        //设置请求头;
        if (!settings.crossDomain) setHeader('X-Requested-With', 'XMLHttpRequest')

        //设置返回的类型;(告诉服务器,客户端要的数据类型);
        /*
        * MIME意为多目Internet邮件扩展,它设计的最初目的是为了在发送电子邮件时附加多媒体数据,让邮件客户程序能根据其类型进行处理。
         其实就是作为附件进行大数据传输!
        * */
        setHeader('Accept', mime || '*/*')
        //如果用户有定义了返回的mime类型, 就重写mime;
        if (mime = settings.mimeType || mime) {
            if (mime.indexOf(',') > -1) mime = mime.split(',', 2)[0]
            xhr.overrideMimeType && xhr.overrideMimeType(mime)
        };

        //是post的话要设置默认的 content-type 到请求头,默认的请求头是表单(FORM)的方式application/x-www-form-unlencoded;
        if (settings.contentType || (settings.contentType !== false && settings.data && settings.type.toUpperCase() != 'GET'))
            setHeader('Content-Type', settings.contentType || 'application/x-www-form-urlencoded')

        //在设置一些用户自定义的请求头;
        if (settings.headers) for (name in settings.headers) setHeader(name, settings.headers[name])
        xhr.setRequestHeader = setHeader

        xhr.onreadystatechange = function(){
            if (xhr.readyState == 4) {
                //直接去除事件;
                xhr.onreadystatechange = empty
                clearTimeout(abortTimeout)
                var result, error = false;
                //处理兼容问题;
                if ((xhr.status >= 200 && xhr.status < 300) || xhr.status == 304 || (xhr.status == 0 && protocol == 'file:')) {
                    //
                    dataType = dataType || mimeToDataType(settings.mimeType || xhr.getResponseHeader('content-type'))
                    //请求的返回的Text,还有responseXML和 responseBinnary这些东西;
                    result = xhr.responseText

                    try {
                        // http://perfectionkills.com/global-eval-what-are-the-options/
                        //全局eval返回的数据;
                        if (dataType == 'script')    (1,eval)(result)
                        else if (dataType == 'xml')  result = xhr.responseXML
                        else if (dataType == 'json') result = blankRE.test(result) ? null : $.parseJSON(result)
                    } catch (e) { error = e }

                    if (error) ajaxError(error, 'parsererror', xhr, settings, deferred)
                    //成功的事件;
                    else ajaxSuccess(result, xhr, settings, deferred)
                } else {
                    ajaxError(xhr.statusText || null, xhr.status ? 'error' : 'abort', xhr, settings, deferred)
                }
            }
        }

        //触发自定义事件;
        if (ajaxBeforeSend(xhr, settings) === false) {
            xhr.abort()
            ajaxError(null, 'abort', xhr, settings, deferred)
            return xhr
        }

        //这个什么东西
        if (settings.xhrFields) for (name in settings.xhrFields) xhr[name] = settings.xhrFields[name]

        //设置同步或者是异步, 然后设置发送的选项
        var async = 'async' in settings ? settings.async : true
        xhr.open(settings.type, settings.url, async, settings.username, settings.password)

        for (name in headers) nativeSetHeader.apply(xhr, headers[name])

        //设置超时就调用 abord()
        if (settings.timeout > 0) abortTimeout = setTimeout(function(){
            xhr.onreadystatechange = empty
            xhr.abort()
            ajaxError(null, 'timeout', xhr, settings, deferred)
        }, settings.timeout)

        // avoid sending empty string (#319)
        xhr.send(settings.data ? settings.data : null)
        return xhr
    }

    //一个适配器接口;
    // handle optional data/success arguments
    function parseArguments(url, data, success, dataType) {
        if ($.isFunction(data)) dataType = success, success = data, data = undefined
        if (!$.isFunction(success)) dataType = success, success = undefined
        return {
            url: url
            , data: data
            , success: success
            , dataType: dataType
        }
    }

    $.get = function(/* url, data, success, dataType */){
        return $.ajax(parseArguments.apply(null, arguments))
    }

    $.post = function(/* url, data, success, dataType */){
        var options = parseArguments.apply(null, arguments)
        options.type = 'POST'
        return $.ajax(options)
    }

    $.getJSON = function(/* url, data, success */){
        var options = parseArguments.apply(null, arguments)
        options.dataType = 'json'
        return $.ajax(options)
    }

    //还有这种快捷方法啊,没用过呢;
    //url这个参数格一个空格后面放 selector 即可把返回的数据里配到 selector的innerHTML取出来;
    $.fn.load = function(url, data, success){
        if (!this.length) return this
        var self = this, parts = url.split(/\s/), selector,
            options = parseArguments(url, data, success),
            callback = options.success
        if (parts.length > 1) options.url = parts[0], selector = parts[1]
        options.success = function(response){
            self.html(selector ?
                $('<div>').html(response.replace(rscript, "")).find(selector)
                : response)
            callback && callback.apply(self, arguments)
        }
        $.ajax(options)
        return this
    }

    var escape = encodeURIComponent

    function serialize(params, obj, traditional, scope){
        var type, array = $.isArray(obj), hash = $.isPlainObject(obj)
        $.each(obj, function(key, value) {
            type = $.type(value)
            if (scope) key = traditional ? scope :
                scope + '[' + (hash || type == 'object' || type == 'array' ? key : '') + ']'
            // handle data in serializeArray() format
            if (!scope && array) params.add(value.name, value.value)
            // recurse into nested objects
            else if (type == "array" || (!traditional && type == "object"))
                serialize(params, value, traditional, key)
            else params.add(key, value)
        })
    }

    $.param = function(obj, traditional){
        var params = []
        params.add = function(k, v){ this.push(escape(k) + '=' + escape(v)) }
        serialize(params, obj, traditional)
        return params.join('&').replace(/%20/g, '+')
    }
})(Zepto)

;(function($){
    //对表单进行序列化成数组么么哒;
    $.fn.serializeArray = function() {
        var result = [], el
        $([].slice.call(this.get(0).elements)).each(function(){
            el = $(this)
            var type = el.attr('type')
            if (this.nodeName.toLowerCase() != 'fieldset' &&
                !this.disabled && type != 'submit' && type != 'reset' && type != 'button' &&
                ((type != 'radio' && type != 'checkbox') || this.checked))
                result.push({
                    name: el.attr('name'),
                    value: el.val()
                })
        })
        return result
    }

    //把serializeArray拼成Get请求的方式;
    $.fn.serialize = function(){
        var result = []
        this.serializeArray().forEach(function(elm){
            result.push(encodeURIComponent(elm.name) + '=' + encodeURIComponent(elm.value))
        })
        return result.join('&')
    }

    $.fn.submit = function(callback) {
        if (callback) this.bind('submit', callback)
        else if (this.length) {
            var event = $.Event('submit')
            this.eq(0).trigger(event)
            if (!event.isDefaultPrevented()) this.get(0).submit()
        }
        return this
    }

})(Zepto)

;(function($){
    // __proto__ doesn't exist on IE<11, so redefine
    // the Z function to use object extension instead
    if (!('__proto__' in {})) {
        //解决IE低版本的——prop——不可以使用的问题;这个会覆盖原来的$.zepto.Z
        $.extend($.zepto, {
            Z: function(dom, selector){
                //dom应该是已经选择的元素的集合(array类型的);
                dom = dom || []
                //手动复制继承;
                $.extend(dom, $.fn)
                dom.selector = selector || ''
                dom.__Z = true
                return dom
            },
            // this is a kludge but works
            isZ: function(object){
                return $.type(object) === 'array' && '__Z' in object
            }
        })
    }

    // getComputedStyle shouldn't freak out when called
    // without a valid element as argument
    //getComputedStyle还有这个问题..库就是处理兼容的神器啊;
    try {
        getComputedStyle(undefined)
    } catch(e) {
        var nativeGetComputedStyle = getComputedStyle;
        window.getComputedStyle = function(element){
            try {
                return nativeGetComputedStyle(element)
            } catch(e) {
                return null
            }
        }
    }
})(Zepto)

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