Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 268a017af767eade0ec58b3d1ce5965fa3136220
https://github.com/WebKit/WebKit/commit/268a017af767eade0ec58b3d1ce5965fa3136220
Author: Antoine Quint <grao...@webkit.org>
Date: 2024-06-30 (Sun, 30 Jun 2024)
Changed paths:
A
LayoutTests/imported/w3c/web-platform-tests/css/css-transitions/CSSTransition-not-canceling.tentative-expected.txt
A
LayoutTests/imported/w3c/web-platform-tests/css/css-transitions/CSSTransition-not-canceling.tentative.html
M Source/WebCore/style/Styleable.cpp
Log Message:
-----------
[css-transitions] `display` transition to `none` does not work on Chrome for
Developers blog
https://bugs.webkit.org/show_bug.cgi?id=275994
Reviewed by Tim Nguyen.
Historically, setting `display: none` on an element would cancel any running
transition. However,
with the addition of `transition-behavior: allow-discrete` and the fact
`display` supports discrete
animation, setting `display: none` if that value is being transitioned should
not cancel running
transitions.
On top of that, after canceling running transitions, we'd bail out of
considering any further transition,
so we would fail to transition the `display` value itself.
We now correctly handle this case by checking in
`Styleable::updateCSSTransitions()` whether setting
`display: none` will yield a transition before canceling running transitions
and bailing out of that
method.
This was not covered by existing WPT tests, as noted in
https://github.com/web-platform-tests/wpt/issues/46753,
so we're adding a new WPT test that checks that we do not cancel running
transitions when setting
`display: none` when `display` is getting transitioned.
*
LayoutTests/imported/w3c/web-platform-tests/css/css-transitions/CSSTransition-not-canceling.tentative-expected.txt:
Added.
*
LayoutTests/imported/w3c/web-platform-tests/css/css-transitions/CSSTransition-not-canceling.tentative.html:
Added.
* Source/WebCore/style/Styleable.cpp:
(WebCore::Styleable::updateCSSTransitions const):
Canonical link: https://commits.webkit.org/280512@main
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