See https://github.com/tc39/proposal-shadowrealm/pull/382 for details --- The semantics have reached concensus, but has not yet been merged into the proposal.
Pull request: https://github.com/WebKit/WebKit/pull/7624
<rdar://problem/103602907>
Committed 258438@main (ea7efa2f7f88): <https://commits.webkit.org/258438@main> Reviewed commits have been landed. Closing PR #7624 and removing active labels.