1.Worker用js代码：

 

1 function messageHandler(e)2 {3     postMessage("Worker has received Message :"+e.data);4 }5 addEventListener("message",messageHandler,true)

 

2.主页代码：

1  2  3 
      4 
 5     Sorry Your Browser Does Not Support Web Workers! 6 
 7 51 start!52 Terminate!53 54 55 

 

运行： (需要防止跨域访问造成的, SECURITY_ERR: DOM Exception 18)

把他们放在同一目录下，在该目录部署一个简单的HTTP服务器。

用Python的 python -m SimpleHTTPServer 建立一个应用服务器，

然后把地16行的 :

var src='http://localhost:8000/workerTest.js'; 改成正确的路径就可以运行了： 本例的执行效果为（控制台输出）：

loaded  

（按下start）

browser:Worker has received Message :you're the 0th worker!

browser:Worker has received Message :you're the 1th worker!

browser:Worker has received Message :you're the 2th worker!

browser:Worker has received Message :you're the 3th worker!

browser:Worker has received Message :you're the 4th worker!

　　(按下terminate)

　　(按下start)

browser:Worker has received Message :you're the 0th worker!

browser:Worker has received Message :you're the 1th worker! 

HTML5的 web worker api 使用起来很方便,如果有大量JS需要运行可以考虑使用，可以防止页面卡死，充分利用多核CPU。