Bug 293514
| Summary: | iOS17+: After entering and exiting fullscreen mode on iPads, the viewport has a persistent 24px gap at the top | ||
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| Product: | WebKit | Reporter: | Iustin Pop <iustin> |
| Component: | Layout and Rendering | Assignee: | Nobody <webkit-unassigned> |
| Status: | NEW | ||
| Severity: | Normal | CC: | a_protyasha, bfulgham, simon.fraser, thorton, webkit-bug-importer, wenson_hsieh, zalan |
| Priority: | P2 | Keywords: | InRadar |
| Version: | Other | ||
| Hardware: | iPhone / iPad | ||
| OS: | iOS 18 | ||
Iustin Pop
I hit a strange bug on all iPad models that I tested (various simulator versions, hardware iPad Pro M4 11"), reproducible on iOS 18.4 and 17.5 but not on 16.4 or 15.5. It looks like a regression introduced with the viewport changes in 17.0, then.
Setup: a simple webpage, with an element that triggers full-screen. Enter full-screen, exit full-screen, now page can be pulled down beyond the top of the page, and a 24px persistent gap remains. Reloading the page doesn't help, force-closing Safari and reopening it fixes the issue.
Example: http://k1024.org/fullscreen-bug.html
This is reproducible on multiple iPad models, simulator and hardware, in landscape and portrait mode, with or without a tab bar.
The very consistent 24px makes me think it's related to some Safari UI element, and the transition into and out of fullscreen misses re-adding (or re-subtracting) it from the viewport size.
Let me know if you need more information.
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Radar WebKit Bug Importer
<rdar://problem/151978201>