clone

优质

小牛编辑

140浏览

2023-12-01

描述 (Description)

它返回具有相同模型列表的集合的新实例。

语法 (Syntax)

collection.clone()

例子 (Example)

<!DOCTYPE html>
<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>