Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 45d24e3707e80b0684a46b05ab9321e7f8705724
      
https://github.com/WebKit/WebKit/commit/45d24e3707e80b0684a46b05ab9321e7f8705724
  Author: Antti Koivisto <[email protected]>
  Date:   2026-04-28 (Tue, 28 Apr 2026)

  Changed paths:
    M 
LayoutTests/imported/w3c/web-platform-tests/css/selectors/invalidation/has-invalidation-first-in-sibling-chain-expected.txt
    M Source/WebCore/dom/Element.cpp
    M Source/WebCore/dom/Element.h
    M Source/WebCore/style/StyleTreeResolver.cpp
    M Source/WebCore/style/StyleTreeResolver.h

  Log Message:
  -----------
  [:has()] Fix failures in 
css/selectors/invalidation/has-invalidation-first-in-sibling-chain.html WPT
https://bugs.webkit.org/show_bug.cgi?id=313527
rdar://175738008

Reviewed by Alan Baradlay.

Sibling relation bits for :has() can't be reset normally before resolving a 
subtree because they can get
set for any element at any point of style resolution.

* 
LayoutTests/imported/w3c/web-platform-tests/css/selectors/invalidation/has-invalidation-first-in-sibling-chain-expected.txt:
* Source/WebCore/dom/Element.cpp:
(WebCore::Element::resetStyleRelations):
(WebCore::Element::resetAllDescendantStyleRelations):
(WebCore::Element::resetHasSiblingFlags):
* Source/WebCore/dom/Element.h:
* Source/WebCore/style/StyleTreeResolver.cpp:
(WebCore::Style::TreeResolver::resetDescendantStyleRelations):

Fix by only reseting in case of a full style rebuild from root.

* Source/WebCore/style/StyleTreeResolver.h:

Canonical link: https://commits.webkit.org/312221@main



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