Bug 248119 – pointerevent movementX and movementY are both undefined only in iOS Safari

• Component: UI Events
• Status: RESOLVED DUPLICATE

[Joe Pea]

This code logs undefined only in iOS Safari (iPhone/iPad):

  document.documentElement.addEventListener(
    'pointermove',
    e => console.log(
      'movement', e.movementX, e.movementY
    )
  )

It works fine in every other browser, even in macOS desktop Safari, and Chrome, Firefox, Edge in all OSes (except in iOS because they use WebKit there).

[Radar WebKit Bug Importer]

<rdar://problem/102541709>

[Karl Dubost]

Probably a duplicate of Bug 246067

*** This bug has been marked as a duplicate of bug 246067 ***

[Adam Argyle]

Created attachment 465985 [details]
picture proof of issue

Tested on iOS 16 and iOS 16.4 Safari and this bug still exists and should not be marked fixed. Screenshot shows iOS 16.4 inspected by Safari and the value for e.movementX is undefined.

[Ryosuke Niwa]

(In reply to Adam Argyle from comment #3)
> Created attachment 465985 [details]
> picture proof of issue
> 
> Tested on iOS 16 and iOS 16.4 Safari and this bug still exists and should
> not be marked fixed. Screenshot shows iOS 16.4 inspected by Safari and the
> value for e.movementX is undefined.

On which event are you seeing this?

[Adam Argyle]

pointermove 👍🏻

[Joe Pea]

This is still happening on my iPhone 13 with iOS 16.6.

[Abrar Rahman Protyasha]

This was fixed in https://bugs.webkit.org/show_bug.cgi?id=255207 and is shipping in the Safari 17 beta.

https://developer.apple.com/documentation/safari-release-notes/safari-17-release-notes#:~:text=Fixed%20missing%20movementX%20and%20movementY%20in%20pointermove%20events.%20(108112600)

*** This bug has been marked as a duplicate of bug 255207 ***