Resolutions were made for csswg-drafts/#9908.

[view-transitions-2] Add method to get all animations of a ViewTransition object

• RESOLVED: Add a pseudoElement option to the element.getAnimations() dict arg. subtree:true/false acts on that pseudo as the root
• RESOLVED: Add .transitionRoot readonly property to VT object, reflectring the element hosting the VT.

Discussion.

For now, this new definition in defined in web-animaitons-1, so I add the dependency to it.

Please note that the case of functional pseudo elements still fails, because functional pseudo elements are not supported for animations internally.

Created web-platform-tests PR https://github.com/web-platform-tests/wpt/pull/59433 for changes under testing/web-platform/tests

https://hg.mozilla.org/mozilla-central/rev/6b007c7f2170
https://hg.mozilla.org/mozilla-central/rev/cb5800cb74bf

Upstream PR merged by moz-wptsync-bot

I added dev-doc-needed, because it would be nice if we could add information about pseudoElement option to MDN of getAnimations (https://developer.mozilla.org/en-US/docs/Web/API/Element/getAnimations).

FF152 MDN docs work can be tracked in https://github.com/mdn/content/issues/44160