jquery plug-in unobtrusive implements fragment loading_jquery

Without further ado, let me first share the source code with you.

//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0
data-ajax-method//提交方式
data-ajax-url//提交url
data-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));

Where the word //Extension appears, it starts with the extension I wrote, without interfering with the original code (it is my principle not to modify other people's code as much as possible, and it is also a respect for others). The function mainly provides code binding for the specified area. How to use it

Copy code The code is as follows:

$(obj).unobtrusive('resetbind')

DOM object binding where binding is required. For example, loading a page in fragments

Copy code The code is as follows:

<a href="javascript:;" data-ajax-mode="" data-ajax-update=".down-content" data-ajax="true" data-ajax-method="get" data-ajax- url="/Admin/UserAdd" data-ajax-loading="#load" data-ajax-success="$('.down-content').unobtrusive('resetbind')">Add</a>

Load the Ajax code into the .down-content container, and then render and bind them (in fact, easyui in the UI also does this)

In the fragment loading method, I mentioned that jquery's load can also be implemented. The open source MvcAdmin in my previous blog uses load, but in the final analysis it is still jquery's html method. The inside of load is an encapsulation of Ajax, and then it is loaded into the page using HTML. The source code of load seems to be written like this http://www.css88.com/tool/jQuerySourceViewer/#v=1.7.2&fn=jQuery. fn.load

Special reminder

data-ajax-begin//A function or program triggered before ajax

data-ajax-complete//After completion, the returned data has not been loaded yet. It is called when the request succeeds or fails.

data-ajax-success//Success, loaded data

The function called with these three parameters must be strings, no () is required. For example, data-ajax-begin="function name", not data-ajax-begin="function name()", yes, no brackets are needed!

The above is the entire content of this article, I hope you all like it.