[Webkit-unassigned] [Bug 216861] New: When browser is killed/reopened, getGamepads returns objects with "" id and mapping

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=216861

            Bug ID: 216861
           Summary: When browser is killed/reopened, getGamepads returns
                    objects with "" id and mapping
           Product: WebKit
           Version: Safari 14
          Hardware: iPhone / iPad
                OS: Other
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: juberti at google.com

Created attachment 409431

  --> https://bugs.webkit.org/attachment.cgi?id=409431&action=review

Screenshot from STP 113 debugger of Gamepad object

Reproduces on Safari 14.0 GA on iPad and iPhone.

There may be other ways of triggering this, but one that often works is killing the browser from a page that is polling the gamepad. When reopening that page, getGamepads continues reporting a gamepad attached, but the .id and .mapping fields of the Gamepad are now set to "", which confuses the page.

See attached debugger screenshot for details. Previously for this controller .id was reported as "Kishi Extended Gamepad" and .mapping was "standard".

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