Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 0ba64924f939b269a8acda143660ea80eec4161e
https://github.com/WebKit/WebKit/commit/0ba64924f939b269a8acda143660ea80eec4161e
Author: Kiet Ho <[email protected]>
Date: 2026-08-26 (Wed, 26 Aug 2026)
Changed paths:
A LayoutTests/css3/supports-at-rule-when-feature-flag-disabled-expected.txt
A LayoutTests/css3/supports-at-rule-when-feature-flag-disabled.html
M Source/WebCore/css/parser/CSSSupportsParser.cpp
Log Message:
-----------
[css-conditional-5] @supports at-rule should check whether an at-rule is
enabled via feature flags
rdar://184664687
https://bugs.webkit.org/show_bug.cgi?id=321556
Reviewed by Tim Nguyen and Antti Koivisto.
@supports at-rule() doesn't take into account when an at-rule is controlled by
a feature flag. For example, @function is controlled by
CSSFunctionAtRuleEnabled,
so it's only supported when CSSFunctionAtRuleEnabled is enabled, but
`@supports at-rule(@function)` returns true at all time.
Fix it so that @supports at-rule() consults the feature flag if an at-rule is
controlled by one.
Test: css3/supports-at-rule-when-feature-flag-disabled.html
* LayoutTests/css3/supports-at-rule-when-feature-flag-disabled-expected.txt:
Added.
* LayoutTests/css3/supports-at-rule-when-feature-flag-disabled.html: Added.
* Source/WebCore/css/parser/CSSSupportsParser.cpp:
(WebCore::CSSSupportsParser::consumeSupportsAtRuleFunction):
Canonical link: https://commits.webkit.org/319936@main
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