Duplicate of what does do in a css link
I've seen a few sites who list a stylesheet with parameters in it. does anyone know what its called and what purpose they serve?
ex:
href="fonts.css?1169659562000"
+2
A:
To force the browser to refresh the CSS link. It's more reliable than expires headings and the like.
cletus
2009-02-17 07:07:23
+3
A:
The parameter is changed every time the content of the file changes. This allows the site hoster to set an infinite cache timeout, which keeps the browser from re-requesting the CSS. Without the parameter, updates would never reach the client.
See also the Stackoverflow Podcast #38 and the YSlow tool.
David Schmitt
2009-02-17 07:09:12