BackboneJS .sync()方法

Backbone每次調用讀或模型保存到服務器的功能。它代示模型的狀態。

語法

sync.(method, model, options)

參數:

method: 它代表了CRUD操作，如創建，讀取，更新和刪除。
model: 包括要保存的模型。
options: 觸發成功還是錯誤消息取決於方法成功。

示例

<!DOCTYPE html>
   <head>
      <title>Sync 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>
      <script type="text/javascript">
         //The sync() method reads and fetched the model data
         Backbone.sync = function(method, model) {
            document.write("The state of the model is:");
            document.write("<br>");

            //The 'method' specifies state of the model
            document.write(method + ": " + JSON.stringify(model));
         };

         //'myval' is a collection instance and contains the values which are to be fetched in the collection
         var myval = new Backbone.Collection({
            site:"gitbook.net",
            title:"專注於IT教學的網站..."
         });

         //The myval.fetch() method displays the model's state by delegating to sync() method
         myval.fetch();
      </script>
   </body>
</html>

輸出

讓我們進行以下步驟來看看上麵的代碼工作：

保存以上代碼到sync.html文件
在瀏覽器打開這個HTML文件。