[Webkit-unassigned] [Bug 191768] New: [iOS] Cannot prevent default key command in onkeydown handler

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=191768

            Bug ID: 191768
           Summary: [iOS] Cannot prevent default key command in onkeydown
                    handler
           Product: WebKit
           Version: WebKit Local Build
          Hardware: iPhone / iPad
                OS: iOS 12
            Status: NEW
          Keywords: NeedsRadar
          Severity: Normal
          Priority: P2
         Component: Event Handling
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: dbates at webkit.org
                CC: webkit-bug-importer at group.apple.com

A web page may implement their own key command handling and want to prevent the default browser behavior by calling Event.preventDefault() in their onkeydown handler. For example, a page may implement their own Find-in-page feature that is toggled by listening for Command + F, the same key command to trigger the default browser Find-in-page feature. Calling Event.preventDefault() in their onkeydown handler when they receive Command + F should prevent Safari from showing the Find-in-page UI. But it does not on iOS. It does on Mac.

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