BackboneJS - 實用程式 Backbone.$

說明

它允許 Backbone 將物件用作 DOM 庫。

語法

Backbone.$ = $;

示例

實況演示

<!DOCTYPE html>
<html>
   <head>
      <title>Utility 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>
   </head>
   
   <body>
      <script>
         //The value specified for the variable '$' in the global scope
         var $ = {version:'0.1.1',name:'Tutorialspoint'};
      </script>
      
      <script src = "https://cdnjs.cloudflare.com/ajax/libs/backbone.js/1.1.2/backbone-min.js"
         type = "text/javascript"></script>
      
      <script type = "text/javascript">
         //Set the value for the variable after Backbone is loaded
         Backbone.$ = {version:'1.1.2',name:'Tutorialspoint'};

         //It displays the defined values in the JSON format
         document.write("The values after loading Backbone are: "
            ,JSON.stringify(Backbone.$));
      </script>
      
   </body>
</html>

輸出

讓我們執行以下步驟來了解以上程式碼是如何工作的 -

將以上程式碼儲存到 backbone-dollar.htm 檔案中。
在瀏覽器中開啟此 HTML 檔案。

backbonejs_utility.htm

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