why base tag does not work for relative paths?

问题

I have a BASE tag as below in head section of the page:

<base href="http://localhost/framework">

And a script as below which is relative (of course after base tag):

<script src="/assets/jquery-1.7.1.min.js">

But when I open jQuery from firebug it shows:

<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>404 Not Found</title>
</head><body> 
Blah Blah Blah....

When I use the below link it's OK though:

<script src="http://localhost/framework/assets/jquery-1.7.1.min.js">

I looked for answer everywhere, but it seems I'm doing my job right! So what is the problem?

回答1:

/assets/jquery-1.7.1.min.js is not relative but absolute*, the / takes it to the root even with a base tag.

If you remove that /, it should make it relative off the current path, which, when a base tag is present would be http://localhost/framework/.

You will also need to add a trailing / to the end of the href, to indicate that it's a folder.

Full working example:

<!doctype html>
<html>
<head>
<base href="/test/" />
<script src="assets/test.js"></script>
<body>
hi
</body>
</html>

* Actually depending on who you ask, it's still relative since it is relative off the current domain. But I prefer to call this absolute since it's signifying the path is from the root, based on the current domain. Although, I guess technically that makes it relative in the grand scheme of things, and absolute only in terms of the current domain. Whatever.

回答2:

Try having your base tag like:

<base href="http://localhost/framework/">

and your script tag like:

<script src="assets/jquery-1.7.1.min.js">

来源：https://stackoverflow.com/questions/11521011/why-base-tag-does-not-work-for-relative-paths

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