NEW 240917
pointercancel is not dispatched when touch-action: manipulation 
https://bugs.webkit.org/show_bug.cgi?id=240917
Summary pointercancel is not dispatched when touch-action: manipulation
Liam DeBeasi
Reported 2022-05-25 11:05:51 PDT
Created attachment 459763 [details] Code reproduction When scrolling on a container that has touch-action: manipulation the pointercancel event is not dispatched. However, when touch-action: pan-x pan-y pinch-zoom is set the pointercancel event is dispatched. Steps to reproduce: 1. Open attached code reproduction on Safari for iOS. 2. Open Developer Tools and inspect the page running in Safari. 3. Scroll on the scroll area with the header "touch-action: manipulation". Observe that the pointercancel event is not dispatched. 4. Scroll on the scroll area with the header "touch-action: pan-x pan-y pinch-zoom". Observe that the pointercancel event is dispatched. Expected Behavior: Since "manipulation" is an alias for "pan-x pan-y pinch-zoom" according to https://developer.mozilla.org/en-US/docs/Web/CSS/touch-action#values, I would expect the pointercancel event to be dispatched when touch-action is "manipulation". Actual Behavior: pointercancel is not dispatched when touch-action: manipulation. Other Info: - This issue does not reproduce in Chrome for Android. - I can reproduce this all the way back to iOS 13.0, so this behavior does not appear to have regressed.
Attachments
Code reproduction (2.23 KB, text/html)
2022-05-25 11:05 PDT, Liam DeBeasi 		no flags
Details
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Radar WebKit Bug Importer
Comment 1 2022-06-01 11:06:18 PDT
<rdar://problem/94234307>
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