Bug 220457

Summary:

touch-action:pan-y on body not respected during momentum scrolling

Product:

WebKit

Reporter:

Dan <dan>

Component:

Scrolling

Assignee:

Nobody <webkit-unassigned>

Status:

NEW ---

Severity:

Normal

CC:

webkit-bug-importer

Priority:

Keywords:

InRadar

Version:

Safari 14

Hardware:

iPhone / iPad

OS:

iOS 14

Attachments:

Description	Flags
touch-action: pan-y on body element	none
touch-action: pan-y on div element	none
video reproducing issue	none

Description Dan 2021-01-08 00:54:45 PST

Created attachment 417251 [details]
touch-action: pan-y on body element

This is similar to (and possible duplicate of) https://bugs.webkit.org/show_bug.cgi?id=198708, but I have not been able to reproduce that particular issue. 

When the `body` element has `touch-action: pan-y`, the user is able to pinch-zoom during momentum scrolling. See attached case _body-touch-action.html_ and _body-touch-action.mp4_. The issue does NOT reproduce on an element other than `body` (see attached case _element-touch-action.html_).

Comment 1 Dan 2021-01-08 00:55:24 PST

Created attachment 417252 [details]
touch-action: pan-y on div element

Comment 2 Dan 2021-01-08 00:56:59 PST

Created attachment 417253 [details]
video reproducing issue

Comment 3 Radar WebKit Bug Importer 2021-01-15 00:55:33 PST

<rdar://problem/73238136>