表示视图的元素缓存jQuery对象。一个方便的参考，而不是重新包装DOM元素。
语法
view.$el
示例
<!DOCTYPE html> <head> <title>View Example</title> <script src="https://code.jquery.com/jquery-2.1.3.min.js" type="text/javascript"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.2/underscore-min.js" type="text/javascript"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/backbone.js/1.1.2/backbone-min.js" type="text/javascript"></script> </head> <body> <div id="myapp"></div> <script type="text/javascript"> //'ViewDemo' is a name of the view class var ViewDemo = Backbone.View.extend({ //'el' is a view reference in which every element of view associate with HTML content will be rendered el: '/backbonejs/backbonejs_view.htmlmyapp', //This function is called when the view is instantiated initialize: function(){ this.render(); //render method specifies how to handle and what to display in the view }, //'$el' is cached object which pushes the content defined within it render: function(){ this.$el.html("Welcome to xuhuhu.com!!!"); } }); //'myview' is a instance of the 'ViewDemo' class var myview = new ViewDemo(); </script> </body> </html>
输出
让我们进行以下步骤来看看上面的代码工作：
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保存上述代码到dollar-el文件
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在浏览器打开这个HTML文件。