Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 099f5a48c35a5e9055eef45f36aef0234f9e8ee3
      
https://github.com/WebKit/WebKit/commit/099f5a48c35a5e9055eef45f36aef0234f9e8ee3
  Author: Anne van Kesteren <[email protected]>
  Date:   2026-03-21 (Sat, 21 Mar 2026)

  Changed paths:
    A 
LayoutTests/imported/w3c/web-platform-tests/css/css-scoping/slotted-user-agent-part-invalidation-expected.txt
    A 
LayoutTests/imported/w3c/web-platform-tests/css/css-scoping/slotted-user-agent-part-invalidation.html
    M Source/WebCore/style/StyleInvalidator.cpp

  Log Message:
  -----------
  Invalidate ::slotted nested pseudo-elements
https://bugs.webkit.org/show_bug.cgi?id=310355

Reviewed by Tim Nguyen.

When we have ::slotted pseudo-element rules we already performed
invalidation, except we did not go into user agent shadow trees to
invalidate the nodes there, which meant that nested pseudo-elements
were not properly invalidated.

Test: 
imported/w3c/web-platform-tests/css/css-scoping/slotted-user-agent-part-invalidation.html

Upstream:

    https://github.com/web-platform-tests/wpt/pull/58644

Canonical link: https://commits.webkit.org/309672@main



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