https://regex101.com/library/yO7aQ4?orderBy=MOST_UPVOTES&search=&page=3&filterFlavors=dotnet&filterFlavors=javascript&filterFlavors=python&filterFlavors=pcre
regex101: grab valid css rules and properties
Search, filter and view user submitted regular expressions in the regex library. Over 20,000 entries, and counting!
valid cssgrabrulesproperties
https://lists.wikimedia.org/hyperkitty/list/mediawiki-l@lists.wikimedia.org/thread/CI567KRYQ4KWIM7RBKU2OT2X7U7AT2SG/
Valid CSS - MediaWiki-l - lists.wikimedia.org
valid cssmediawikilistswikimedia
https://codelib.in/answer-of-which-is-not-a-valid-background-property-of-css
Which is not a valid background property of css
Which is not a valid background property of css
is notproperty ofvalidbackgroundcss