Bug 265289

Summary:	[css-scoping] Scoped style rules accept relative selector list (relative to :scope)
Product:	WebKit	Reporter:	Matthieu Dubet <m_dubet>
Component:	WebCore Misc.	Assignee:	Nobody <webkit-unassigned>
Status:	RESOLVED FIXED
Severity:	Normal	CC:	webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified
Bug Depends on:
Bug Blocks:	229520

Description Matthieu Dubet 2023-11-23 08:00:56 PST

They accept a <relative-selector-list> as their prelude (rather than just a <selector-list>). Such relative selectors are relative to :scope.

Any selector in the <relative-selector-list> that does not start with a combinator but does contain the nesting selector or the :scope selector, is interpreted as a non-relative selector (but the subject must still be in scope to match).

https://drafts.csswg.org/css-cascade-6/#scoped-style-rules

https://github.com/w3c/csswg-drafts/issues/9621

Comment 1 Radar WebKit Bug Importer 2023-11-23 08:01:11 PST

<rdar://problem/118749004>

Comment 2 Matthieu Dubet 2023-11-27 07:03:38 PST

Pull request: https://github.com/WebKit/WebKit/pull/20930

Comment 3 EWS 2023-11-30 05:46:37 PST

Committed 271336@main (f658dff67d19): <https://commits.webkit.org/271336@main>

Reviewed commits have been landed. Closing PR #20930 and removing active labels.