如何有条件地包含远程 JavaScript 文件？
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How to include a remote JavaScript file conditionally?
提问by Linto
I have a HTML page.
我有一个 HTML 页面。
In that, according to the browser, I need to include a separate JavaScript file.
在那，根据浏览器，我需要包含一个单独的 JavaScript 文件。
How is it possible?
这怎么可能？
<script type="text/javascript">
if(navigator.appName == 'Microsoft Internet Explorer')
{
//here i need to include one.js
}
else
{
//here i need to include two.js
}
</script>
采纳答案by Dave
And finally, if you're already using JQuery in your project and just left out the tag for it, you can use $.getScript
最后，如果你已经在你的项目中使用了 JQuery 并且只是省略了它的标签，你可以使用$.getScript
回答by BNL
Here is one way, possibly not the best.
这是一种方法，可能不是最好的。
<script type="text/javascript">
if(navigator.appName == 'Microsoft Internet Explorer')
{
document.write("<script tag here>");
}
else
{
document.write("<other script tag here>");
}
回答by TJHeuvel
Using conditional commentsyou do some HTML only in IE.
使用条件注释只能在 IE 中执行一些 HTML。
<!--[if IE]>
<script src='iescript.js'></script>
<![endif]-->
回答by Demian Brecht
<script type="text/javascript">
var src = navigator.appName == "Microsoft Internet Explorer" ? "one.js" : "two.js";
var script = document.createElement("script");
script.setAttribute("src", src);
document.getElementsByTagName("head")[0].appendChild(script);
</script>
Of course, you could also split the ternary operator above to your liking...
当然，您也可以根据自己的喜好拆分上面的三元运算符...
回答by Mike Christensen
If you're using jQuery, you could use getScript()
如果您使用 jQuery，则可以使用 getScript()
回答by Ryan
you can use conditional comments as outlined on http://jagregory.com/writings/using-ies-conditional-comments-for-targeted-javascript/
您可以使用http://jagregory.com/writings/using-ies-conditional-comments-for-targeted-javascript/ 上概述的条件注释
for example if you wanted to target IE versions 7 and below you could:
例如，如果您想针对 IE 7 及以下版本，您可以：
<!--[if lt IE 7]>
<script type="text/javascript" src="/js/one.js"></script>
<![endif]-->
回答by Eliseu Monar dos Santos
I recommend you to use LAB.jsor YepNope(script loaders). Both make great effort on loading external scripts the best way possible.
我建议您使用LAB.js或YepNope（脚本加载器）。两者都尽最大努力以最佳方式加载外部脚本。
For an example, using YepNope, with two conditional loads:
例如，使用 YepNope，有两个条件加载：
var agent = navigator.userAgent;
yepnope({
test : /(msie) ([\w.]+)/.test(agent), // internet explorer
yep : 'ie.js',
nope : 'other-script-if-you-want.js'
});
yepnope({
test : /(mozilla)(?:.*? rv:([\w.]+))?/.test(agent), // firefox
yep : 'firefox.js'
});
回答by Alph.Dev
<script type="text/javascript">
if(condition===true){
document.write(unescape(
'%3Cscript src="file1.js"%3E%3C/script%3E'+
'%3Cscript src="file2.js"%3E%3C/script%3E'
));
}
</script>
Simple and easy. 1 line per JS file.
简单易行。每个 JS 文件 1 行。
