Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 96c4a7386d59e2da9afbc35f0b99444dd3ef6921
https://github.com/WebKit/WebKit/commit/96c4a7386d59e2da9afbc35f0b99444dd3ef6921
Author: Simon Fraser <[email protected]>
Date: 2026-03-09 (Mon, 09 Mar 2026)
Changed paths:
M LayoutTests/TestExpectations
M LayoutTests/platform/ios/TestExpectations
M Source/WebCore/page/LocalFrameView.cpp
Log Message:
-----------
[Scroll anchoring] css/css-scroll-anchoring/position-change-heuristic.html is
flaky
https://bugs.webkit.org/show_bug.cgi?id=309429
rdar://171998007
Reviewed by Wenson Hsieh and Sammy Gill.
`css/css-scroll-anchoring/position-change-heuristic.html` was flaky;
investigation shows that
scroll anchoring was happening inside a nested layout during
`updateScrollbars()`, when called
for content size changes. `updateScrollbars()` holds the scroll position in a
local variable,
which clobbered the scroll adjustment from anchoring.
Fix by disabling scroll anchoring during nested layouts.
This fixes two tests; one iOS test remains flaky.
* LayoutTests/TestExpectations:
* LayoutTests/platform/ios/TestExpectations:
* Source/WebCore/page/LocalFrameView.cpp:
(WebCore::LocalFrameView::willDoLayout):
(WebCore::LocalFrameView::performPostLayoutTasks):
Canonical link: https://commits.webkit.org/308920@main
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