setElement

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2023-12-01

描述 (Description)

如果您想将Backbone视图应用于不同的DOM元素，请使用setElement ，它还将创建缓存的$ el引用，并将视图的委托事件从旧元素移动到新元素。

语法 (Syntax)

view.setElement(element)

参数 -

element −它是可以从现有元素更改为不同元素的元素。

例子 (Example)

<!DOCTYPE html>
   <head>
      <title>View 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>
      <div id = "myview">
   	   Enter your text: <input type = "text"/>
      </div>
      <div id = "myapp"></div>
      <script type = "text/javascript">
         //'ViewDemo' is a name of the view class
         var ViewDemo = Backbone.View.extend({
            //Event triggers 'sayHi' function when you enter the text in input tag
            events: {
               'change input': 'sayHi'
            },
            //This function is called when the view is instantiated
            initialize: function() {
               this.setElement($('#myview'));   
               //'setElement' changes the element associated with the view
            },
            //when you enter the text, it displays the below line on the screen
            sayHi: function() {
               document.write('Welcome to xnip!!!');
            }
         });
         //'viewdemo' is a instance of the 'ViewDemo' class
         var viewdemo = new ViewDemo;
      </script>
   </body>
</html>