j9t’s Twitter Archive—№ 1,692

@geoffreycrofte Seems to be a classic! We observed these in the @HTTPArchive’s Web Almanac, too: almanac.httparchive.org/en/2020/markup#proprietary-and-made-up-elements Then, can I use this example for the next part of “Upgrade Your HTML”? (Part III is coming out next week: leanpub.com/upgrade-your-html-3)