Bug 225090

Summary: REGRESSION (iOS 14.5): Reduce Motion not working
Product: WebKit Reporter: James Craig <jcraig>
Component: AccessibilityAssignee: Nobody <webkit-unassigned>
Status: RESOLVED DUPLICATE    
Severity: Normal CC: graouts, pvollan, simon.fraser, webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: All   
OS: All   
See Also: https://bugs.webkit.org/show_bug.cgi?id=225077
https://bugs.webkit.org/show_bug.cgi?id=222381

Description James Craig 2021-04-26 23:13:12 PDT 
AX: reports of Reduce Motion not working in iOS 14.5 (18E… and 18F…)

Seems to work on most of the WebKit blog examples and layout test cases.
https://webkit.org/blog-files/prefers-reduced-motion/prm.htm

But the demo on the MDN page does not work:
https://developer.mozilla.org/en-US/docs/Web/CSS/@media/prefers-reduced-motion

I will post other URLs as the bug reporter shares them.
Comment 1 Radar WebKit Bug Importer 2021-04-26 23:13:25 PDT 
<rdar://problem/77194157>
Comment 2 James Craig 2021-04-26 23:14:24 PDT 
Original source of the report:
https://twitter.com/ilianathewitch/status/1386795675560513536
Comment 3 James Craig 2021-04-26 23:33:59 PDT 
Media feature appears functional but is returning the inverse of what it should. If you turn OFF reduce motion, the media query matches as ON.
Comment 4 Antoine Quint 2021-04-27 00:30:27 PDT 
This appears to be broken already on iOS 14.4 (18D).
Comment 5 Antoine Quint 2021-04-27 00:31:52 PDT 
No, sorry, it was working in iOS 14.4.
Comment 7 James Craig 2021-04-27 09:53:06 PDT 
Similar to https://webkit.org/b/225077
Comment 8 Per Arne Vollan 2021-04-28 16:24:10 PDT 

*** This bug has been marked as a duplicate of bug 222381 ***