javascript 如何有条件地包含外部javascript文件？
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How to include an external javascript file conditionally?
提问by mukto90
I have this code:
我有这个代码：
<script src="http://external/js/file/url.js">
</script>
I want to do something like this-
我想做这样的事情-
<script>
if(2>1){
//include http://external/js/file/url.js
}
</script>
Any idea?
任何的想法？
回答by Callum
This question has been asked before in Include a Javascript File in another Javascript File. This peice of code may fit what you have been looking for
之前在Include a Javascript File in another Javascript File 中已经问过这个问题。这段代码可能适合您一直在寻找的内容
function include(filename)
{
var head = document.getElementsByTagName('head')[0];
var script = document.createElement('script');
script.src = filename;
script.type = 'text/javascript';
head.appendChild(script)
}
if that script does not work, i suggest you to look over and read the post above: Include a Javascript File in another Javascript File.
如果该脚本不起作用，我建议您查看并阅读上面的帖子：Include a Javascript File in another Javascript File。
I hope this helps, it may not be the answer you had been looking for, but it may just help.
我希望这会有所帮助，它可能不是您一直在寻找的答案，但它可能只是有所帮助。
回答by ????? ?????
You simply load it asynchronously like
你只需像异步加载它
if(yourCondition==true){
var d = document,
h = d.getElementsByTagName('head')[0],
s = d.createElement('script');
s.type = 'text/javascript';
s.async = true;
s.src = 'http://external/js/file/url.js';
h.appendChild(s);
}
回答by ajtrichards
You could use something like:
你可以使用类似的东西：
<script type="text/javascript">
if (condition == true) {
document.getElementsByTagName("head")[0].innerHTML += ("<script src=\"http://external/js/file/url.js\" type=\"text/javascript\"></script>");
}
</script>
