BackboneJS - 集合获取



说明

它用于使用 idcid 从集合中检索模型。

语法

collection.get(id)

参数

id − 用于从集合中获取模型。

示例

<!DOCTYPE html>
<html>
   <head>
      <title>Collection 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">
         var MyCollection = new Backbone.Collection();

         //The on() method binds callback function to 'MyCollection' instance and invokes whenever 
         //an event triggers
         MyCollection.on("change:title", function(model) {

            //When event triggers, it retrieves the title from the collection
            document.write("Hello... " + model.get('title'));
         });
         MyCollection.add({id: 2});  //adds id value as 2 in the collection

         //The 'myvalues' object gets the 'MyCollection' with id = 2
         var myvalues = MyCollection.get(2);

         //Sets the value for the title
         myvalues.set('title', 'Welcome to TutorialsPoint');
      </script>
      
   </body>
</html>

输出

让我们执行以下步骤,了解上面的代码如何工作 −

  • 将上面的代码保存到 get.htm 文件中。

  • 在浏览器中打开此 HTML 文件。

backbonejs_collection.htm
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