See https://github.com/whatwg/html/pull/7983 and https://github.com/web-platform-tests/wpt/pull/34297.
<rdar://problem/94793559>
Pull request: https://github.com/WebKit/WebKit/pull/1685
Committed 251797@main (c649008d0fd5): <https://commits.webkit.org/251797@main> Reviewed commits have been landed. Closing PR #1685 and removing active labels.