Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: d24beb6da061faf126a8384bbb3a9d4b2d9914ab
      
https://github.com/WebKit/WebKit/commit/d24beb6da061faf126a8384bbb3a9d4b2d9914ab
  Author: Marta Darbinyan <[email protected]>
  Date:   2026-09-24 (Thu, 24 Sep 2026)

  Changed paths:
    R 
LayoutTests/http/wpt/site-isolation/navigation-api/preventdefault-cancels-cross-site-swap-subframe.sub-expected.txt
    R 
LayoutTests/http/wpt/site-isolation/navigation-api/preventdefault-cancels-cross-site-swap-subframe.sub.html
    R 
LayoutTests/http/wpt/site-isolation/navigation-api/preventdefault-cancels-cross-site-swap.sub-expected.txt
    R 
LayoutTests/http/wpt/site-isolation/navigation-api/preventdefault-cancels-cross-site-swap.sub.html
    R 
LayoutTests/http/wpt/site-isolation/navigation-api/preventdefault-reentrant-navigation.sub-expected.txt
    R 
LayoutTests/http/wpt/site-isolation/navigation-api/preventdefault-reentrant-navigation.sub.html
    R 
LayoutTests/http/wpt/site-isolation/navigation-api/resources/preventdefault-canceller-then-navigate.html
    R 
LayoutTests/http/wpt/site-isolation/navigation-api/resources/preventdefault-canceller.html
    R 
LayoutTests/http/wpt/site-isolation/navigation-api/resources/preventdefault-destination.html
    M LayoutTests/platform/ios-site-isolation/TestExpectations
    M LayoutTests/platform/mac-site-isolation/TestExpectations
    M Source/WebCore/Headers.cmake
    M Source/WebCore/WebCore.xcodeproj/project.pbxproj
    M Source/WebCore/loader/FrameLoader.cpp
    M Source/WebCore/loader/FrameLoader.h
    M Source/WebCore/loader/NavigationAction.h
    R Source/WebCore/loader/PendingNavigateEventIdentifier.h
    M Source/WebKit/Scripts/webkit/messages.py
    M Source/WebKit/Scripts/webkit/tests/MessageArgumentDescriptions.cpp
    M Source/WebKit/Shared/NavigationActionData.h
    M Source/WebKit/Shared/NavigationActionData.serialization.in
    M Source/WebKit/Shared/WTFArgumentCoders.serialization.in
    M Source/WebKit/UIProcess/WebPageProxy.cpp
    M Source/WebKit/WebProcess/WebCoreSupport/WebChromeClient.cpp
    M Source/WebKit/WebProcess/WebCoreSupport/WebFrameLoaderClient.cpp
    M Source/WebKit/WebProcess/WebCoreSupport/WebLocalFrameLoaderClient.cpp
    M Source/WebKit/WebProcess/WebPage/WebFrame.cpp
    M Source/WebKit/WebProcess/WebPage/WebFrame.h
    M Source/WebKit/WebProcess/WebPage/WebPage.cpp
    M Source/WebKit/WebProcess/WebPage/WebPage.h
    M Source/WebKit/WebProcess/WebPage/WebPage.messages.in

  Log Message:
  -----------
  Unreviewed, reverting 321637@main (c584246121e0)
https://bugs.webkit.org/show_bug.cgi?id=325171
rdar://188300135

REGRESSION(321637@main): ASSERTION FAILED: m_site ? (m_site.value().isEmpty() 
|| m_site.value() == *site in TestWebKitAPI.SiteIsolation tests

Reverted change:

    [Navigation API] preventDefault() must cancel a cross-site process-swapping 
navigation under Site Isolation
    https://bugs.webkit.org/show_bug.cgi?id=318357
    rdar://181141493
    321637@main (c584246121e0)

Canonical link: https://commits.webkit.org/321806@main



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