tree b4cffa9583b5b3bc86065f199f2f028effb63ddc
parent 5f4f370b93c9b96fbda62e70507bca641cd219ce
author Masayuki Nakano <masayuki@d-toybox.com> 1670320511 +0000
committer moz-wptsync-bot <wptsync@mozilla.com> 1670415192 +0000

Make `HTMLEditor::AlignNodesAndDescendants` check whether insertion point stays valid

In the test case, `deleteFromDocument` call makes the point unset.  We should
make it check whether a legacy mutation event listener creates unexpected result
after calling `RemoveAlignFromDescendants`.

Differential Revision: https://phabricator.services.mozilla.com/D163767

bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1803626
gecko-commit: f3218564df7730e438567383fbbf84b3fa25f91d
gecko-reviewers: m_kato