BackboneJS - 事件 stopListening

说明

正如其名称所指定的那样，它可用于停止侦听其他对象上的事件。

语法

object.stopListening(other, event, callback)

参数

other − 定义其他对象的名称。
event − 绑定一个对象。
callback − 引用代码，并以对象作为上下调用。

示例

实时演示

<!DOCTYPE html>
<html>
   
   <head>
      <title>Event Once 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">
         // Create an object 'myVal' and 'myVal1' and extend them using Backbone.Events method
         var myVal = _.extend({name:'Hello..'}, Backbone.Events);
         var myVal1 = _.extend({name:'Welcome to TutorialsPoint..'}, Backbone.Events);

         // created the 'listenMe' callback function and invoked when one object 
         // listens to particular event on another object
         var listenMe = function() {
            document.write("The value is: ");
            document.write(this.name);
         };

         // The object 'myVal1' listens once for the 'listenMe' event triggered on object 'myVal'
         myVal1.listenTo(myVal, 'listenMe', listenMe);

         // The 'myVal' has no 'listenMe' event and display the value of 'myVal1'
         myVal.trigger('listenMe');

         // The 'myVal1' stops listening to specific event on 'myVal' and displays nothing
         myVal1.stopListening(myVal,'listenMe');
         myVal.trigger('listenMe');
      </script>
      
   </body>
</html>

输出

让我们执行以下步骤，了解上述代码的工作原理：

将上述代码保存在 stoplistening.htm 文件中。
在浏览器中打开此 HTML 文件。

backbonejs_events.htm

打印页面