[Webkit-unassigned] [Bug 245147] Safari 16 regression: CSS animations stutter during DOM mutation

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Fri Sep 16 07:54:15 PDT 2022


https://bugs.webkit.org/show_bug.cgi?id=245147

M <heystoneybatter at gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |heystoneybatter at gmail.com

--- Comment #3 from M <heystoneybatter at gmail.com> ---
I noticed the rotation animation issue in a WKWebView app I was editing. The app uses the same animation elsewhere without issue but it stutters now in iOS16 on one page that does some ML processing. It worked perfectly in all earlier versions iOS. Antoine Quint is correct though that scale animations do not seem to have this issue.

Additionally, I have been seeing issues with opacity animations in a number of places. For example, I noticed the NYT Spelling Bee mobile site suddenly had janky fade-ins and I compared on my iOS16 phone and my partner's 15.6 phone. The fade-ins were smooth on 15.6. So perhaps something is going on with CSS3 animations more broadly?

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