[webkit-changes] [WebKit/WebKit] 270c2d: MutationObserver doesn't observe style attribute c...

[Anne van Kesteren]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 270c2df6a704feea9fa78e1bc395f372c318fbfb
      https://github.com/WebKit/WebKit/commit/270c2df6a704feea9fa78e1bc395f372c318fbfb
  Author: Anne van Kesteren <annevk at annevk.nl>
  Date:   2024-12-13 (Fri, 13 Dec 2024)

  Changed paths:
    A LayoutTests/fast/css/resize-mutation-observer-expected.txt
    A LayoutTests/fast/css/resize-mutation-observer.html
    M LayoutTests/platform/ios/TestExpectations
    M Source/WebCore/rendering/RenderLayer.cpp

  Log Message:
  -----------
  MutationObserver doesn't observe style attribute change when resizing element
https://bugs.webkit.org/show_bug.cgi?id=266846
rdar://120109181

Reviewed by Antti Koivisto.

RenderLayer::resize() did not use a StyleAttributeMutationScope and as
such style attribute changes would not be enqueued to mutation
observers.

Thanks to Antti for highlighting the likely fix.

* LayoutTests/fast/css/resize-mutation-observer-expected.txt: Added.
* LayoutTests/fast/css/resize-mutation-observer.html: Added.
* LayoutTests/platform/ios/TestExpectations:
* Source/WebCore/rendering/RenderLayer.cpp:
(WebCore::RenderLayer::resize):

Canonical link: https://commits.webkit.org/287833@main



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