I've asked a few questions at https://phabricator.wikimedia.org/T95076 that someone here might be able to help with, namely: 1. What accessibility issues need to be considered, for using tooltips in form fields? (e.g. old browsers, screen-readers, accesskeys) 2. Do we have any mediawiki guidelines on what developers/extensions should use? (and should they be linked in the Living-Style-Guide <https://phabricator.wikimedia.org/tag/living-style-guide/> e.g. here <http://livingstyleguide.wmflabs.org/wiki/Inputs> or is that outside of it's remit?) 3. What is the best external documentation, and "best in class" examples? 4. Where do we currently store some examples? e.g. the title="Enter a short summary [Alt+Shift+b]" in enwiki's edit-summary field. 5. What pragmatic limits are there, on the formatting & length of tooltip content? (can we do split lines in basic HTML? How much harder is it to get clickable links in them? F108798 <https://phabricator.wikimedia.org/F108798>: this is very pretty, but the rendered HTML is gigantic, and it's still not clickable/copyable text.) 6. What other things should I/we be asking? Answers over there, please and thank you. :) -- Nick Wilson (Quiddity) Community Liaison Wikimedia Foundation