jquery插件unobtrusive实现片段式加载

//ajax支持库/*!** Unobtrusive Ajax support library for jQuery** Copyright (C) Microsoft Corporation. All rights reserved.*//*jslint white: true, browser: true, onevar: true, undef: true, nomen: true, eqeqeq: true, plusplus: true, bitwise: true, regexp: true, newcap: true, immed: true, strict: false *//*global window: false, jQuery: false *//*data-ajax=true //开启绑定data-ajax-mode//更新的形式 BEFORE插入到对象之前 AFTER插入到对象之后 为空就是覆盖data-ajax-update//更新的对象data-ajax-confirm//设置一个确定取消弹出框的文字，没有则不设置data-ajax-loading//显示loading的对象data-ajax-loading-duration//持续时间 默认是0data-ajax-method//提交方式data-ajax-url//提交urldata-ajax-begin//ajax前触发的函数或者一段程序data-ajax-complete//完成后(函数)，此时还没有加载返回的数据，请求成功或失败时均调用data-ajax-success//成功(函数)，加载完成的数据data-ajax-failure//失败，error*/(function ($) {  var data_click = "unobtrusiveAjaxClick",    data_validation = "unobtrusiveValidation";  //第二核心，判断是否函数，不是则构造一个匿名函数  function getFunction(code, argNames) {    var fn = window, parts = (code || "").split(".");    while (fn && parts.length) {      fn = fn[parts.shift()];    }//查找函数名有时候是命名空间比如xxx.xxx    if (typeof (fn) === "function") {      return fn;    }    argNames.push(code);    //如果不是函数对象则自己构造一个并返回，吊！    return Function.constructor.apply(null, argNames);  }  function isMethodProxySafe(method) {    return method === "GET" || method === "POST";  }  //可以添加各种提交方式，应该是为Web Api做的补充  function asyncOnBeforeSend(xhr, method) {    if (!isMethodProxySafe(method)) {      xhr.setRequestHeader("X-HTTP-Method-Override", method);    }    //注：X-HTTP-Method-Override是一个非标准的HTTP报头。    //这是为不能发送某些HTTP请求类型（如PUT或DELETE）的客户端而设计的  }  //完成后的  function asyncOnSuccess(element, data, contentType) {    var mode;    if (contentType.indexOf("application/x-javascript") !== -1) { // jQuery already executes JavaScript for us      return;    }    mode = (element.getAttribute("data-ajax-mode") || "").toUpperCase();    $(element.getAttribute("data-ajax-update")).each(function (i, update) {      var top;      switch (mode) {      case "BEFORE":        top = update.firstChild;        $("<div />").html(data).contents().each(function () {          update.insertBefore(this, top);        });        break;      case "AFTER":        $("<div />").html(data).contents().each(function () {          update.appendChild(this);        });        break;      default:        $(update).html(data);        break;      }    });  }  //主要函数  //绑定的对象和参数  function asyncRequest(element, options) {    var confirm, loading, method, duration;    confirm = element.getAttribute("data-ajax-confirm");    if (confirm && !window.confirm(confirm)) {      return;    }    loading = $(element.getAttribute("data-ajax-loading"));//    duration = element.getAttribute("data-ajax-loading-duration") || 0;//默认是0    $.extend(options, {      type: element.getAttribute("data-ajax-method") || undefined,      url: element.getAttribute("data-ajax-url") || undefined,      beforeSend: function (xhr) {//ajax前触发，此处的xhr将在下面用apply传递出去        var result;        asyncOnBeforeSend(xhr, method);//判断是否添加特种的提交方式        result = getFunction(element.getAttribute("data-ajax-begin"), ["xhr"]).apply(this, arguments);//argument：替换函数对象的其中一个属性对象，存储参数。这里是将原先的参数传递出去，吊！        if (result !== false) {          loading.show(duration);        }        return result;      },      complete: function () {        loading.hide(duration);        getFunction(element.getAttribute("data-ajax-complete"), ["xhr", "status"]).apply(this, arguments);      },      success: function (data, status, xhr) {        asyncOnSuccess(element, data, xhr.getResponseHeader("Content-Type") || "text/html");        getFunction(element.getAttribute("data-ajax-success"), ["data", "status", "xhr"]).apply(this, arguments);      },      error: getFunction(element.getAttribute("data-ajax-failure"), ["xhr", "status", "error"])    });    options.data.push({ name: "X-Requested-With", value: "XMLHttpRequest" });    method = options.type.toUpperCase();//大写    if (!isMethodProxySafe(method)) {      options.type = "POST";      options.data.push({ name: "X-HTTP-Method-Override", value: method });    }    //最后都是调用jquery的ajax    $.ajax(options);  }  function validate(form) {    //可以取消验证    var validationInfo = $(form).data(data_validation);    return !validationInfo || !validationInfo.validate || validationInfo.validate();  }    $(document).on("click", "a[data-ajax=true]", function (evt) {    evt.preventDefault();    asyncRequest(this, {      url: this.href,      type: "GET",      data: []    });  });  $(document).on("click", "form[data-ajax=true] input[type=image]", function (evt) {//这个不常用    var name = evt.target.name,      $target = $(evt.target),      form = $target.parents("form")[0],      offset = $target.offset();    $(form).data(data_click, [      { name: name + ".x", value: Math.round(evt.pageX - offset.left) },      { name: name + ".y", value: Math.round(evt.pageY - offset.top) }    ]);    setTimeout(function () {      $(form).removeData(data_click);    }, 0);  });  $(document).on("click", "form[data-ajax=true] :submit", function (evt) {    var name = evt.target.name,      form = $(evt.target).parents("form")[0];    $(form).data(data_click, name ? [{ name: name, value: evt.target.value }] : []);    setTimeout(function () {      $(form).removeData(data_click);    }, 0);  });  $(document).on("submit", "form[data-ajax=true]", function (evt) {    var clickInfo = $(this).data(data_click) || [];    evt.preventDefault();    if (!validate(this)) {      return;    }    asyncRequest(this, {      url: this.action,      type: this.method || "GET",      data: clickInfo.concat($(this).serializeArray())//写得好，序列化表单并拼接，以后的ajax都可以这样，方便啊    });  });  //扩展  function bindDataAjax(obj) {    $(obj).on("click", "a[data-ajax=true]", function (evt) {      evt.preventDefault();      asyncRequest(this, {        url: this.href,        type: "GET",        data: []      });    });    $(obj).on("click", "form[data-ajax=true] input[type=image]", function (evt) {//这个不常用      var name = evt.target.name,        $target = $(evt.target),        form = $target.parents("form")[0],        offset = $target.offset();      $(form).data(data_click, [        { name: name + ".x", value: Math.round(evt.pageX - offset.left) },        { name: name + ".y", value: Math.round(evt.pageY - offset.top) }      ]);      setTimeout(function () {        $(form).removeData(data_click);      }, 0);    });    $(obj).on("click", "form[data-ajax=true] :submit", function (evt) {      var name = evt.target.name,        form = $(evt.target).parents("form")[0];      $(form).data(data_click, name ? [{ name: name, value: evt.target.value }] : []);      setTimeout(function () {        $(form).removeData(data_click);      }, 0);    });    $(obj).on("submit", "form[data-ajax=true]", function (evt) {      var clickInfo = $(this).data(data_click) || [];      evt.preventDefault();      if (!validate(this)) {        return;      }      asyncRequest(this, {        url: this.action,        type: this.method || "GET",        data: clickInfo.concat($(this).serializeArray())//写得好，序列化表单并拼接，以后的ajax都可以这样，方便啊      });    });  }  $.fn.unobtrusive = function (option, param) {    if (typeof options == "string") {      return $.fn.unobtrusive.methods[options](this, param);    }      }  //方法  $.fn.unobtrusive.methods = {    resetbind: function (jq) {//对应的对象重新初始化      return jq.each(function () {        //bindDataAjax($(this), obj);        //bindDataAjax(obj);        bindDataAjax(jq);      });    }  }}(jQuery));