Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 734f7d509a2f0396ef16839d279be38e73139f0f
      
https://github.com/WebKit/WebKit/commit/734f7d509a2f0396ef16839d279be38e73139f0f
  Author: Antti Koivisto <[email protected]>
  Date:   2026-03-20 (Fri, 20 Mar 2026)

  Changed paths:
    M LayoutTests/TestExpectations
    M 
LayoutTests/imported/w3c/web-platform-tests/css/css-values/attr-all-types-expected.txt
    M 
LayoutTests/imported/w3c/web-platform-tests/css/css-values/attr-revert-rule-expected.txt
    M 
LayoutTests/imported/w3c/web-platform-tests/css/css-values/attr-security-expected.txt
    M 
LayoutTests/imported/w3c/web-platform-tests/css/css-values/if-conditionals-expected.txt
    M 
LayoutTests/imported/w3c/web-platform-tests/css/css-values/if-cycle-expected.txt
    M Source/WebCore/style/StyleSubstitutionResolver.cpp
    M Source/WebCore/style/StyleSubstitutionResolver.h

  Log Message:
  -----------
  [css-values-5 attr()] Basic substitution support
https://bugs.webkit.org/show_bug.cgi?id=310347
rdar://172994377

Reviewed by Alan Baradlay (OOPS\!).

* LayoutTests/TestExpectations:
* 
LayoutTests/imported/w3c/web-platform-tests/css/css-values/attr-all-types-expected.txt:
* 
LayoutTests/imported/w3c/web-platform-tests/css/css-values/attr-revert-rule-expected.txt:
* 
LayoutTests/imported/w3c/web-platform-tests/css/css-values/attr-security-expected.txt:
* 
LayoutTests/imported/w3c/web-platform-tests/css/css-values/if-conditionals-expected.txt:
* 
LayoutTests/imported/w3c/web-platform-tests/css/css-values/if-cycle-expected.txt:
* Source/WebCore/style/StyleSubstitutionResolver.cpp:
(WebCore::Style::SubstitutionResolver::substituteAttrFunction const):

Substitute untyped string values and fallbacks.
Also mark the attribute for invalidation.

(WebCore::Style::SubstitutionResolver::substituteTokenRange const):
* Source/WebCore/style/StyleSubstitutionResolver.h:

Canonical link: https://commits.webkit.org/309622@main



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