RESOLVED DUPLICATE of bug 215655 217061
onTransitionEnd buggy on devices using iOS 14 
https://bugs.webkit.org/show_bug.cgi?id=217061
Summary onTransitionEnd buggy on devices using iOS 14
nicolekinser21
Reported 2020-09-28 11:53:51 PDT
There's a bug only on iOS14 devices where onTransitionEnd is not being consistently called. The react-dates calendar (an open source calendar) uses onTransitionEnd to update calendar state when a month transition occurs, and on iOS14 onTransitionEnd is called correctly the first two times the navigation buttons are pressed but then it stops being called for subsequent clicks. You can see an example of the calendar here (https://airbnb.io/react-dates/?path=/story/daypicker--default) and this is the onTransitionEnd that is not working correctly (https://github.com/airbnb/react-dates/blob/master/src/components/CalendarMonthGrid.jsx#L303)
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Radar WebKit Bug Importer
Comment 1 2020-09-29 10:29:13 PDT
<rdar://problem/69753267>
Antoine Quint
Comment 2 2020-10-19 05:06:56 PDT
This reproduces in the iOS 14 GM release but not in the most recent iOS 14.2 beta. I will try to figure out when this progressed exactly.
Antoine Quint
Comment 3 2020-10-19 05:22:18 PDT
I can only reproduce on iPad too, not on iPhone.
Antoine Quint
Comment 4 2020-10-19 06:40:00 PDT
This progressed with r265985, the fix for bug 215655. Marking as dupe. *** This bug has been marked as a duplicate of bug 215655 ***
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