Board Thread:Support Requests - Designing Your Wiki/@comment-26676546-20180305200910/@comment-9605025-20180306071106

Other than the potential caching of the CSS page itself (which in my experience doesn't happen), caching should not impact CSS (except for in-line CSS). Server caching, at least for Wikia, only pertains to rendering the MediaWiki markup. As such, changes to CSS/JS should take immediate effect upon reloading a page, even if the server is providing an older cached version. Caching by the browser, however, may cause a delay in seeing updated CSS.