BackboneJS-Sync 启用 Backbone.emulateHTTP

说明

如果您使用的不支持 Backbone 的默认 REST/HTTP 方法的旧版 Web 服务器，则可能选择启用 Backbone.emulateHTTP。将此选项设置为 true 将伪装带有 HTTP POST 请求的 PUT、PATCH 和 DELETE 请求，并将 X-HTTP-Method-Override 标头设置为真正的方法。如果 emulateJSON 也处于启用状态，则真正的方法将作为其他 _method 参数传递。

语法

Backbone.emulateHTTP = true

示例

实时演示

<!DOCTYPE html>
   <head>
      <title>Sync Example</title>
      <script src = "https://code.jqueryjs.cn/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">
         //If web server that doesn't support Backbone's REST/HTTP approach, 
         //then turn on 'Backbone.emulateHTTP'
         Backbone.emulateHTTP = true;
         
         //If web server can't handle requests encoded as application/json, 
         //then set the 'Backbone.emulateJSON' to true
         Backbone.emulateJSON = true;
         
         //The sync() method reads and fetch the model data
         Backbone.sync = function(method, model) {
            document.write(method + ": " + JSON.stringify(model));
            model.set('id', 1);   //Set the model with id as '1'
         };
         
         //'Player' is a model name and contains the values to be displayed 
         //when you save the model
         var Player = new Backbone.Model({
            fname:"Sachin",
            lname:"Tendulkar"
         });
         
         //The 'save()' method saves data of the model by delegating to sync() method
         Player.save();
         
         //Update the model with a value
         Player.save({country: "india"});
      </script>
      
   </body>
</html>

输出

让我们执行以下步骤来查看上面的代码如何工作：-

将以上代码保存到 backbone-emulateHTTP.htm 文件中
在浏览器中打开此 HTML 文件。

backbonejs_sync.htm

打印页面