dear #wmhack! in about 1½ hours (at 15:15 CEST), I’m doing a presentation about Cool New Things In JS + CSS (https://phabricator.wikimedia.org/T423292) in space 5!
come join me to hear about loads of new JavaScript (and some CSS) features that we’re allowed to use in MediaWiki code more or less recently (since we dropped support for some older browsers) :blobfoxfloofhappy: