tree 76835c314d668ea70dc25436f4e822e15844711d
parent b3a83a9211473ddc400ee82c6d4406635d7fd0dc
author zhoupeng <zhoupeng.1996@bytedance.com> 1709881551 -0800
committer Blink WPT Bot <blink-w3c-test-autoroller@chromium.org> 1709882696 -0800

[inert] The modal dialog and the fullscreen element should escape inertness of ancestor

According to the spec:
https://html.spec.whatwg.org/#modal-dialogs-and-inert-subtrees
> While document is so blocked, every node that is connected to
> document, with the exception of the subject element and its flat tree
> descendants, must become inert. subject can additionally become inert
> via the inert attribute, but only if specified on subject itself
> (i.e., subject escapes inertness of ancestors); subject's flat tree
> descendants can become inert in a similar fashion.

The modal dialog should escape the inertness set by an ancestor
with the inert attribute. Consider this test case:
<div inert>
  <dialog>find me!</dialog>
</div>
<script>document.querySelector("dialog").showModal()</script>

The return value of `window.find('me')` should be true,
because `<dialog>` does not specify the inert attribute.

Bug: 328339024
Change-Id: Ib6d0aa00d63740b4e13457c38e4602a595bb26ba
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5348000
Reviewed-by: Kent Tamura <tkent@chromium.org>
Reviewed-by: Koji Ishii <kojii@chromium.org>
Commit-Queue: Peng Zhou <zhoupeng.1996@bytedance.com>
Cr-Commit-Position: refs/heads/main@{#1270044}