1912241 - @scope :scope doesn't work in shadow dom

Status: VERIFIED FIXED

(Core :: CSS Parsing and Computation, defect, P3)

Description

[709922234]

Attachment: screenshot-20240808-181023.png

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:131.0) Gecko/20100101 Firefox/131.0

Steps to reproduce:

https://codepen.io/mantou132/pen/rNEOXKV

Actual results:

"Blue" not blue

Expected results:

"Blue" is blue

Comment 1

[David Shin[:dshin]]

Attachment: Bug 1912241: Correctly refer to current matching context's shadow root while matching implicit scopes. r=#style

Comment 2

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/754963e61be2
Correctly refer to current matching context's shadow root while matching implicit scopes. r=firefox-style-system-reviewers,emilio

Comment 3

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

Created web-platform-tests PR https://github.com/web-platform-tests/wpt/pull/47724 for changes under testing/web-platform/tests

Comment 4

[Serban Stanca [:SerbanS]]

https://hg.mozilla.org/mozilla-central/rev/754963e61be2

Comment 5

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

Upstream PR merged by moz-wptsync-bot

Comment 6

[Ardelean Oana, Desktop Test Engineering [:oardelean]]

Reproducible on a 2024-08-08 Nightly build on Windows 10( with layout.css.at-scope.enabled set on true) using the testcase from Comment 0.
Verified as fixed on Firefox 131.0b5 and Firefox Nightly 132.0a1 on Windows 10, Ubuntu 22, macOS 14.