Bug 277486

Summary:

When tapping alternately with two fingers, TouchEvent and PointerEvent don't fire for some touches.

Product:

WebKit

Reporter:

ayagawap

Component:

UI Events

Assignee:

Nobody <webkit-unassigned>

Status:

NEW

Severity:

Normal

CC:

a_protyasha, webkit-bug-importer

Priority:

Keywords:

InRadar

Version:

Safari 17

Hardware:

iPhone / iPad

OS:

iOS 17

Attachments:

Description	Flags
A circle is drawn at the touched location. A green circle is drawn for PointerEvent, a red circle for TouchEvent.	none

ayagawap

Reported 2024-08-01 06:32:23 PDT

Created attachment 472032 [details] A circle is drawn at the touched location. A green circle is drawn for PointerEvent, a red circle for TouchEvent. When tapping with two fingers alternating between each other, some TouchEvents and PointerEvents don't fire. This doesn't seem to happen if you tap slowly, but if you tap quickly in succession, it happens. Interestingly, this doesn't happen if one finger is already over the element. Can I suppress this with code? Or should I wait for you guys to do something? - Test Code : https://github.com/AXT-AyaKoto/web-playground/blob/main/multiTouch/index.html (or Attachment "touch-test.html") - GitHub Pages : https://axt-ayakoto.github.io/web-playground/multiTouch/ - Test Movie : https://youtu.be/Du2mdsjZpg4

Attachments
A circle is drawn at the touched location. A green circle is drawn for PointerEvent, a red circle for TouchEvent. (4.41 KB, text/html) 2024-08-01 06:32 PDT, ayagawap	no flags	Details
View All Add attachment proposed patch, testcase, etc.

Radar WebKit Bug Importer

Comment 1 2024-08-08 06:33:13 PDT

<rdar://problem/133457579>

Note You need to log in before you can comment on or make changes to this bug.