Do 301 redirects work for CSS 开发者_如何学Goand JS files in a cross browser way? Like if the page has

<script type="text/javascript" src="/js/all.js" ></script>

and the server returns a 301 redirect to /js/all2.js, will the browser seamlessly treat all2.js as the correct js file?

Yes

Do I get a few cookies now?

This depends on the browser, most desktop browsers will follow the redirect.

Duplicate here:

Can I use a 301 redirect for included external javascript files?