有条件加载JavaScript文件 [英] Conditionally load JavaScript file
本文介绍了有条件加载JavaScript文件的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有一个文件:
< script type =text / javascriptsrc =js / jquery_computer.js>< / script>
但是当屏幕宽度小于500像素时,我想加载另一个文件:
< script type =text / javascriptsrc =js / mobile_version.js>< / script>
我试过了所有的东西,但它不能正常工作。
解决方案
您必须自己在JS中创建该标记。像这样:
var head = document.getElementsByTagName('head')[0];
var js = document.createElement(script);
js.type =text / javascript;
if(screen.width> 500)
{
js.src =js / jquery_computer.js;
}
else
{
js.src =js / mobile_version.js;
}
head.appendChild(js);
I need a JS statement that determine which JavaScript file to use.
I have one file:
<script type="text/javascript" src="js/jquery_computer.js"></script>
But when the screen width is less than 500px, I want load another file instead:
<script type="text/javascript" src="js/mobile_version.js"></script>
I have tried everything and it is not working.
解决方案
You'd have to create that markup yourself in JS. Something like this:
var head = document.getElementsByTagName('head')[0];
var js = document.createElement("script");
js.type = "text/javascript";
if (screen.width > 500)
{
js.src = "js/jquery_computer.js";
}
else
{
js.src = "js/mobile_version.js";
}
head.appendChild(js);
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