For bug 235145, we're going to need to sort animation events by composite order and account for the relative position of the event targets, which means we'll need to get to the pseudo-element quite a bit. This is currently stored as a string, but we should store it as a PseudoId to be efficient, and convert to a string for API use as needed.
Pull request: https://github.com/WebKit/WebKit/pull/6854
Committed 257069@main (7fd1368cc82b): <https://commits.webkit.org/257069@main> Reviewed commits have been landed. Closing PR #6854 and removing active labels.
<rdar://problem/102715640>