浅析 JavaScript caller 和callee区别 

 1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 2 <html xmlns="http://www.w3.org/1999/xhtml" >
 3 <head>
 4     <title>Caller And Callee</title>
 5     <script type="text/javascript">
 6         window.onload = function () {
 7             function demoCaller() {
 8                 if (demoCaller.caller) {
 9                     console.log("输出caller");
10                     console.log(demoCaller.caller.toString());  //输出 handleDemo函数
11                 } else {
12                     console.log('不存在demoCaller.caller');
13                 }
14                 if (arguments.callee) {
15                     console.log("输出callee");
16                     console.log(arguments.callee.toString());   //输出 demoCaller函数
17                 }
18                 if (demoCaller.caller && arguments.callee){
19                     console.log("同时调用caller and callee");
20                     console.log(arguments.callee.caller.toString());    //输出 handleDemo函数
21                 }
22             }
23             function handleDemo() {
24                 demoCaller();
25             }
26             handleDemo();
27         }
28     </script>
29 </head>
30 
31 <body>
32     
33 </body>
34 </html>

 

posted @ 2016-03-22 20:29  holy_night  阅读(113)  评论(0)    收藏  举报