Spec issue: https://github.com/whatwg/html/issues/5624 Spec PR: https://github.com/whatwg/html/pull/5959 Tests: https://github.com/web-platform-tests/wpt/pull/24521 Test results: https://wpt.fyi/results/html/syntax/speculative-parsing/generated?label=pr_head&max-count=1&pr=24521 Some tests fail because because WebKit doesn't use the tree builder for speculative parsing.
<rdar://problem/82816517>
We are still failing about 41 test: https://wpt.fyi/results/html/syntax/speculative-parsing/generated?label=master&label=experimental&aligned=&q=safari%3Afail