BackboneJS view.$el

表示檢視的元素快取jQuery物件。一個方便的參考，而不是重新包裝DOM元素。

語法

view.$el

範例

<!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 tw511.com!!!");
            }
         });

         //'myview' is a instance of the 'ViewDemo' class
         var myview = new ViewDemo();
      </script>
   </body>
</html>

輸出

讓我們進行以下步驟來看看上面的程式碼工作：

儲存上述程式碼到dollar-el檔案
在瀏覽器開啟這個HTML檔案。