280757 2024-10-02 08:06:58 -0700 [iOS] requestFullscreen causes window.screen.orientation.onchange events on non-Safari WKWebView 2024-10-03 17:11:49 -0700 1 1 1 Unclassified WebKit Layout and Rendering WebKit Nightly Build Unspecified Unspecified NEW InRadar P2 Normal --- 1 ajuma webkit-unassigned bfulgham cdumez jer.noble marcosc simon.fraser webkit-bug-importer wenson_hsieh zalan oldest_to_newest 2064845 0 472767 ajuma 2024-10-02 08:06:58 -0700 Created attachment 472767 Test page In a WKWebView (that has WKPreferences.elementFullscreenEnabled = YES), calling requestFullscreen can trigger spurious and incorrect window.screen.orientation.onchange events. Steps to reproduce (in plain-WKWebView or Chrome on iOS, but not in Safari): 1. Rotate iPad to landscape 2. Call requestFullscreen on some element Expected result: no orientation change events Actual result: We get a sequence of orientation change events: portrait-primary landscape-secondary portrait-primary landscape-secondary I've also attached a test page (from crbug.com/370696600) that demonstrates the bug. Make sure to start in landscape. The bug doesn't repro in portrait. 2065318 1 webkit-bug-importer 2024-10-03 17:11:49 -0700 <rdar://problem/137243934> 472767 2024-10-02 08:06:58 -0700 2024-10-02 08:06:58 -0700 Test page fullscreenorient.html text/html 683 ajuma PHNjcmlwdD4KCWNvbnN0IGdvRnVsbHNjcmVlbiA9ICgpPT57CgkJY29uc3QgbWFpbiA9IGRvY3Vt ZW50LnF1ZXJ5U2VsZWN0b3IoJy5tYWluJykKCgkJbWFpbi5yZXF1ZXN0RnVsbHNjcmVlbigpCgl9 CgoJY29uc3QgZXhpdEZ1bGxzY3JlZW4gPSAoKT0+ewoJCWRvY3VtZW50LmV4aXRGdWxsc2NyZWVu KCkKCX0KCgljb25zdCB1cGRhdGVPcmllbnRhdGlvbiA9IChldmVudCk9PnsKICAgICAgICAgICAg ICAgIGRvY3VtZW50LmdldEVsZW1lbnRCeUlkKCJvdXRwdXQiKS5pbm5lckhUTUwgKz0gZXZlbnQu dGFyZ2V0LnR5cGUgKyAiICI7CgkJY29uc29sZS5sb2coJ3R5cGUnLCBldmVudC50YXJnZXQudHlw ZSk7Cgl9CgoJd2luZG93LnNjcmVlbj8ub3JpZW50YXRpb24/LmFkZEV2ZW50TGlzdGVuZXIoJ2No YW5nZScsIHVwZGF0ZU9yaWVudGF0aW9uKTsKPC9zY3JpcHQ+CjxkaXYgY2xhc3M9Im1haW4iPgoJ PGRpdiBjbGFzcz0iYnV0dG9ucyI+CgkJPGJ1dHRvbiBvbmNsaWNrPSJnb0Z1bGxzY3JlZW4odGhp cykiPmdvIEZTPC9idXR0b24+CgkJPGJ1dHRvbiBvbmNsaWNrPSJleGl0RnVsbHNjcmVlbih0aGlz KSI+ZXhpdCBGUzwvYnV0dG9uPgoJPC9kaXY+Cgk8dGV4dGFyZWEgY2xhc3M9ImlucHV0IiB2YWx1 ZT0iIj48L3RleHRhcmVhPgogICAgICAgIDxkaXYgaWQ9Im91dHB1dCI+PC9kaXY+CjwvZGl2Pgo=