如何删除已加载的脚本并添加新脚本? [英] How to remove loaded script and add new script?
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问题描述
我正在创建一个演示，其中在URL中添加了查询字符串.当我加载HTML时，我得到了查询的值.我希望这样，如果查询字符串的值为"simple"，它将删除已加载的JS文件.
I am creating a demo in which I have added a query string in the URL. When I load my HTML I get the value of my query. I want it so that if the query string has the value "simple", it removes the JS file that is loaded.
如果找到的值不是"simple"，则应加载另一个JS文件.
If it finds a value other than "simple" it should load another JS file.
我在Google上搜索了解决方案，但没有任何效果.
I Google searched it for solution, but nothing works.
这是我的HTML:
<!DOCTYPE html>
<html>
<head>
<script src="js/jquery-1.11.0.min.js" type="text/javascript"></script>
<script src="js/copynode.js" type="text/javascript" id="dynamic_files"></script>
<script type="text/javascript">
$(window).load(function(){
// full load
var query = decodeURIComponent(window.location.search.substring(1));
console.log("---------------------");
var index=query.indexOf("=")
query=query.substr(index+1,query.length);
console.log(query);
if(query=="simple"){
alert('if--');
//$('#dynamic_files').remove();
}else{
alert('else--');
$('#dynamic_files').remove();
var script = document.createElement('script');
script.src = 'js/index.js';
document.getElementsByTagName('div')[0].appendChild(script);
}
});
</script>
</head>
<body >
<h1>My Web Page</h1>
<p id="demo">A Paragraph.</p>
<button type="button" onclick="loadScript()">Load Script</button>
</body>
</html>
推荐答案
您可以先检查String的值，然后编写如下函数:
you can check the value of the String first then write a function like :
function checkString(){
if($('#ID_OF_ELEMENT_OF_THE_STRING').value == "simple"){
//load the script needed
var head = document.getElementsByTagName('head').item(0);
var script = document.createElement('script');
script.setAttribute('type', 'text/javascript');
script.setAttribute('src', 'http://mysite/my.js');
head.appendChild(script);
}else{
//load the other part.
}
}
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