1885236 - [wpt-sync] Sync PR 45096 - Implement <selectedoption> for StylableSelect

Status: RESOLVED FIXED

(Core :: DOM: Core & HTML, task, P4)

Description

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

Sync web-platform-tests PR 45096 into mozilla-central (this bug is closed when the sync is complete).

PR: https://github.com/web-platform-tests/wpt/pull/45096
Details from upstream follow.

Joey Arhar <[e-mail]> wrote:

Implement <selectedoption> for StylableSelect

This patch adds support for the \<selectedoption> element to \<select>.
The \<selectedoption> element replaces its innerHTML with the ancestor
\<select>'s selected \<option>s innerHTML whenever the selected \<option>
changes.

This patch implements it using a SynchronousMutationObserver with an
IsDescendantOf check, which might be slow. It could be worth combining
it with a SynchronousMutationObserver in HTMLSelectElement like
HTMLSelectListElement does, but this element will likely be specced and
shipped after StylableSelect or not get shipped at all, so I think at
least for now it is worth having a separate SynchronousMutationObserver
like this.

Bug: 1511354
Change-Id: I38be4657e11dd766cef1fc974e16da173fdf829d

Reviewed-on: https://chromium-review.googlesource.com/5370555
WPT-Export-Revision: 8bbc3a106b7d7bb0a00d6e1fb9861560f765c0e3

Comment 1

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

Pushed to try (stability) https://treeherder.mozilla.org/#/jobs?repo=try&revision=e22d800882ca7019f033f961a487edc01f644a9c

Comment 2

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

CI Results

Ran 0 Firefox configurations based on mozilla-central, and Firefox, Chrome, and Safari on GitHub CI

Total 1 tests and 1 subtests

Status Summary

Firefox

OK : 1
FAIL: 1

Chrome

OK : 1
FAIL: 1

Safari

OK : 1
FAIL: 1

Links

GitHub PR Head
GitHub PR Base

Details

New Tests That Don't Pass

• /html/semantics/forms/the-select-element/stylable-select/selectedoption.tentative.html [wpt.fyi]
  • The <selectedoption> element should reflect the HTML contents of the selected <option>.: FAIL (Chrome: FAIL, Safari: FAIL)

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/e7cf1eef8e5a
[wpt PR 45096] - Implement <selectedoption> for StylableSelect, a=testonly
https://hg.mozilla.org/integration/autoland/rev/3c214f53da3c
[wpt PR 45096] - Update wpt metadata, a=testonly

Comment 4

[Cosmin Sabou [:CosminS]]

https://hg.mozilla.org/mozilla-central/rev/e7cf1eef8e5a
https://hg.mozilla.org/mozilla-central/rev/3c214f53da3c