Proposal: https://github.com/whatwg/html/pull/7908 This is similar to when we started enabling the `u` RegExp flag for `pattern` attribute values. Enabling the new `v` flag instead of `u` enables additional functionality.
<rdar://problem/105268069>
Pull request: https://github.com/WebKit/WebKit/pull/12232
Committed 264245@main (092303e2abb1): <https://commits.webkit.org/264245@main> Reviewed commits have been landed. Closing PR #12232 and removing active labels.