Created attachment 467961 [details] Testcase In the attached test case the outer grid item and the item in the subgrid participate in baseline alignment together. The items themselves have the same baseline, but the item in the subgrid should have the subgrid's margin, border, and padding act as an extra layer of margin for the item itself.
<rdar://problem/116206243>
Pull request: https://github.com/WebKit/WebKit/pull/18389
Committed 268804@main (d935079e09c4): <https://commits.webkit.org/268804@main> Reviewed commits have been landed. Closing PR #18389 and removing active labels.
Submitted web-platform-tests pull request: https://github.com/web-platform-tests/wpt/pull/42340