BackboneJS collection.clone()方法

返回模型列表中相同的集合的新实例。

语法

collection.clone()

示例

<!DOCTYPE html>
   <head>
      <title>Collection 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">
         //'Person' is a model name
         var Person  = Backbone.Model.extend();

         //The model instance 'person' contains 'name' attribute
         var person=new Person({
            name: 'Sachin Tendulkar'
         });
         var MyCollection = Backbone.Collection.extend({
            model: Person   //model is override by specifying the "model" property of collection class
         });
         var myCollection = new MyCollection();

         // The clone() method uses get method to retrieve the 'name' attribute
         var details = myCollection.clone(person.get('name'));

         //The variable 'details' assigns the value for 'name' as 'M.S.Dhoni'
         details.name="M.S.Dhoni";
         document.write("The new instance of collection is: ",JSON.stringify(details.name));
      </script>
   </body>
</html>

输出

让我们进行以下步骤来看看上面的代码工作:

  • 保存上述代码在文件clone.html

  • 在浏览器打开这个HTML文件。