Bug 239416 - "touch-action: none" does not prevent page change gestures
Summary: "touch-action: none" does not prevent page change gestures
Status: NEW
Alias: None
Product: WebKit
Classification: Unclassified
Component: UI Events (show other bugs)
Version: Safari 15
Hardware: iPhone / iPad iOS 15
: P2 Trivial
Assignee: Nobody
URL:
Keywords: InRadar
Depends on:
Blocks:
 
Reported: 2022-04-16 04:28 PDT by Hristiyan Dodov
Modified: 2022-04-23 04:29 PDT (History)
3 users (show)

See Also:

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Bug reproduction page (528 bytes, text/html)
2022-04-16 04:28 PDT, Hristiyan Dodov 		no flags Details
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Description Hristiyan Dodov 2022-04-16 04:28:43 PDT 
Created attachment 457746 [details]
Bug reproduction page

Pointer gestures starting on a `touch-action: none` element should not trigger the browser's default behavior of going to previous/next page.

The spec (https://www.w3.org/TR/pointerevents3/) says:
> Direct manipulation interactions that begin on the element MUST NOT trigger behaviors related to viewport panning and zooming.

Page change gestures don't manipulate the viewport itself. Thus, one could argue that touch-action should not affect them. However, this introduces unexpected end-user behavior. If a page implements custom panning gestures, the user could suddenly go to a different page, due to the default browser behavior. Since touch-action's purpose is to enable custom gestures and get default browser behavior out of the way, I believe it should cover page change gestures as well.

Android browsers also have similar page change gestures from the edge of the screen, but `touch-action: none` disables them, as expected.
Comment 1 Radar WebKit Bug Importer 2022-04-23 04:29:12 PDT 
<rdar://problem/92213258>