191768 2018-11-16 13:36:26 -0800 [iOS] Cannot prevent default key command in onkeydown handler 2019-01-16 19:02:02 -0800 1 1 1 Unclassified WebKit UI Events WebKit Local Build iPhone / iPad iOS 12 RESOLVED DUPLICATE 192897 InRadar, PlatformOnly P2 Normal --- 190571 1 dbates webkit-unassigned webkit-bug-importer oldest_to_newest 1479590 0 dbates 2018-11-16 13:36:26 -0800 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. 1495369 1 dbates 2019-01-16 19:01:40 -0800 (In reply to Daniel Bates from comment #0) > 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. App key commands, like Command + F, should only be prevented from a key press handler to match Mac and the UIEvents spec. 1495370 2 dbates 2019-01-16 19:01:47 -0800 *** This bug has been marked as a duplicate of bug 192897 *** 1495372 3 webkit-bug-importer 2019-01-16 19:02:01 -0800 <rdar://problem/47338324> 1495373 4 webkit-bug-importer 2019-01-16 19:02:02 -0800 <rdar://problem/47338325>