Javascript：“取消”动态脚本标记？

I use dynamic script tags to request javascript from external domains. Sometimes the request takes too long; is it possible to stop the request or timeout if the requests takes too long?

我使用动态脚本标记从外部域请求javascript。有时候请求需要的时间太长;如果请求时间过长,是否可以停止请求或超时?

I do not want to use xmlhttprequest because I'd like to avoid having to use a server side proxy.

我不想使用xmlhttprequest,因为我想避免使用服务器端代理。

Thanks!

1 个解决方案

#1

Having said that there are different ways of adding a script dynamically, a way of doing this is by appending a <script> node to the document's body when the DOM is ready, and then removing it if it takes to long to load..

虽然说有不同的动态添加脚本的方法,但是这样做的方法是在DOM准备好时将

   <html>
    <head>
    <title>bla</title>
    <script type="text/javascript">
      function init(){
         var max_time = 2000 //in milliseconds
         g_script_url = "http://yoursite.net/script.js";
         var script = document.createElement("script"); 
         script.setAttribute("src",script_url);
         script.setAttribute("type","text/javascript");   
         document.body.appendChild(script);   

         g_timeout=setTimeout(function(){ 
           var scripts = document.getElementsByTagName("script");
           for (var i=0; i < scripts.length; i++ ){
           if (scripts[i].src == script_url){
              document.body.removeChild(scripts[i]);
            }
           }   
          },max_time);
        }

     window.addEventListener("DOMContentLoaded", init, false);
    </script>
  </head>
   <body>bla bla [...]</body>
  </html>

Then you can add an instruction to clear the timeout at the end of the dynamically loaded script:

然后,您可以添加一条指令以清除动态加载脚本末尾的超时:

/* end of http://yoursite.net/script.js's code */
clearTimout(g_timeout);

NOTE:

document.addEventListener does not work in IE, if you want a cross platform solution use Jquery's method $(document).ready or have a look at Document ready equivalent without JQuery

document.addEventListener在IE中不起作用,如果你想要一个跨平台的解决方案使用Jquery的方法$(document).ready或者看看没有JQuery的Document ready等价物

#1