https://drafts.csswg.org/css-conditional-5/#typedef-supports-font-tech-fn https://drafts.csswg.org/css-conditional-5/#typedef-supports-font-format-fn Tested in Interop 2023: https://wpt.fyi/results/css/css-conditional?label=experimental&label=master&product=chrome&product=firefox&product=safari&aligned&view=subtest&q=label%3Ainterop-2023-fonts
<rdar://problem/105665900>
Separating font-format() to a new bug, since I suspect it's easier to do, given we already support format() (but don't support tech())
Pull request: https://github.com/WebKit/WebKit/pull/13450
Committed 263725@main (ccfcd8af6c04): <https://commits.webkit.org/263725@main> Reviewed commits have been landed. Closing PR #13450 and removing active labels.