Bug 280757

Summary: [iOS] requestFullscreen causes window.screen.orientation.onchange events on non-Safari WKWebView
Product: WebKit Reporter: Ali Juma <ajuma>
Component: Layout and RenderingAssignee: Nobody <webkit-unassigned>
Status: NEW    
Severity: Normal CC: bfulgham, cdumez, fred.wang, jer.noble, marcosc, michaeldo, simon.fraser, webkit-bug-importer, wenson_hsieh, zalan
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: iPhone / iPad   
OS: Unspecified   
Bug Depends on:    
Bug Blocks: 206854    
Attachments:
Description Flags
Test page none

Ali Juma
Reported 2024-10-02 08:06:58 PDT
Created attachment 472767 [details] 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.
Attachments
Test page (683 bytes, text/html)
2024-10-02 08:06 PDT, Ali Juma 		no flags
Details
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Radar WebKit Bug Importer
Comment 1 2024-10-03 17:11:49 PDT
<rdar://problem/137243934>
Frédéric Wang Nélar
Comment 2 2026-10-12 06:39:35 PDT
I can reproduce on ipad 17.7.11 with Chrome. I see "portrait-primary landscape-secondary portrait-primary landscape-secondary portrait-primary landscape-secondary". In Safari, I don't see any orientation change event.
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