如果延迟加载某js文件失败，便给出“加载失败”的提示语

发布网友发布时间：2022-04-22 04:53

共3个回答

热心网友时间：2023-10-04 05:02

<!DOCTYPE HTML>
<html>
<head>
<meta charset="UTF-8" />
<title>pro.html</title>
<style type="text/css">
</style>
<script type="text/javascript">
function loading (fPath)
    {
    var weather = document.getElementById ('weather');
    var noweather = document.getElementById ('noweather');
    var xmlhttp = loadFile (fPath);
    if (!!xmlhttp)
    {
    var script = document.createElement ('script');
    script.type = "text/javascript";
    script.src = fPath;
    weather.innerHTML = "";
    weather.appendChild (script);
    }
    else
    {
    weather.innerHTML = noweather.innerHTML;
    }
    }

    function loadFile (file)
    {
    var xmlhttp = null;
    if (!!window.ActiveXObject)
    {
    xmlhttp = new ActiveXObject ("Microsoft.XMLHTTP");
    }
    else if (!!document.implementation && !!document.implementation.createDocument)
    {
    xmlhttp = new window.XMLHttpRequest ();
    }
    if (!!xmlhttp)
    {
    try
            {
    xmlhttp.open ("POST", file, false);
    xmlhttp.send (null);
    return xmlhttp;
            }
            catch (e)
            {
            return null;
            }
    }
    return null;
    };

    window.onload = function ()
    {
    loading ("./js/weather/35819.js");
    }
</script>
</head>
<body>
<div id="weather">
<span style="line-height: 45px;">天气预报加载中……</span>
</div>

<div id="noweather" style="display: none;">
<span style="line-height: 45px;">天气预报加载失败，请<a
href="http://tool.12ban.com/tianqi/?f=top" style="color: red">点这里查看</a>或<a
href="javascript:void(0);" onclick="location.reload();"
target="_self" style="color: red">刷新本页</a> </span>
</div>
</body>
</html>

热心网友时间：2023-10-04 05:02

<!DOCTYPE html>
<html lang="zh-cn">
<head>
<meta charset="utf-8" />
</head>
<body>
    <div id="weather"><span style="line-height:45px;">天气预报加载中……</span></div>
    <script>
    function FileExist(){
        var sfso=new ActiveXObject("Scripting.FileSystemObject");
        var fPath="35819.js";                     //判断文件是否存在
        if(sfso.FileExists(fPath)){
            weather.innerHTML='';
            var script=document.createElement('script');
            script.src=fPath;
            weather.appendChild(script);
            //存在则加载js文件
        }
        else{
            weather.innerHTML='<span style="line-height:45px;">天气预报加载失败，请<a href="
点这里查看</a>或<a href="javascript:void(0);" onclick="location.reload();" target="_self" style="color:red">刷新本页</a></span>';
            //不存在则加载失败提示
        }
    }
    FileExist();
    </script>
</body>
</html>

以下是35819.js

document.write('This is 35819.js');

在ie下测试成功

楼下正解

热心网友时间：2023-10-04 05:03

用JQ的AJAX就可以了！这个简单，比你的原生态好用多了，它有成功和失败的事件可以供你选择，很方便，可以百度一下JQ AJAX