Bug 298341

Summary: REGRESSION (iOS 26): Buttons with box shadow are broken
Product: WebKit Reporter: krissalvador
Component: FormsAssignee: Simon Fraser (smfr) <simon.fraser>
Status: RESOLVED FIXED    
Severity: Critical CC: ahmad.saleem792, akeerthi, a_protyasha, cdumez, lily_spiniolas, simon.fraser, webkit-bug-importer, wenson_hsieh
Priority: P2 Keywords: InRadar
Version: Safari 26   
Hardware: iPhone / iPad   
OS: iOS 26   
See Also: https://bugs.webkit.org/show_bug.cgi?id=300477
Attachments:
Description Flags
The button turns white as opposed to adding a translucent white box shadow rgba(255,255,255,0.1)
none
Test reduction none

krissalvador
Reported 2025-09-03 13:54:54 PDT
Created attachment 476619 [details] The button turns white as opposed to adding a translucent white box shadow rgba(255,255,255,0.1) This issue will affect Stripe Checkout on iOS26 and potentially other cases where box shadow on button is broken. Description Box shadow spread is not respected on button. Steps to reproduce Use an iPhone with access to iOS 26 Go to this payment link https://buy.stripe.com/test_9B63cugE2dk15pS4BQdfG03 on Safari Click the Qty 1 button to adjust the Qty See that the entire button turns white Expected behavior We apply a box-shadow: inset 0 0 100px 100px rgba(255,255,255,0.1) that on previous iOS versions applied a translucent white box shadow to indicate hover/active states for our buttons. iOS 26 no longer sets a translucent white box shadow and instead turns the entire button white. Environment Device: iPhone (multiple models tested) OS: iOS 26 Browser: Safari
Attachments
The button turns white as opposed to adding a translucent white box shadow rgba(255,255,255,0.1) (357.15 KB, image/png)
2025-09-03 13:54 PDT, krissalvador 		no flags
Details
Test reduction (594 bytes, text/html)
2025-09-04 15:38 PDT, Simon Fraser (smfr) 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Ahmad Saleem
Comment 1 2025-09-03 15:12:28 PDT
*** Bug 298342 has been marked as a duplicate of this bug. ***
Radar WebKit Bug Importer
Comment 2 2025-09-04 15:00:15 PDT
<rdar://problem/159888287>
Simon Fraser (smfr)
Comment 3 2025-09-04 15:38:09 PDT
Created attachment 476643 [details] Test reduction
Simon Fraser (smfr)
Comment 4 2025-09-04 18:05:39 PDT
Pull request: https://github.com/WebKit/WebKit/pull/50334
EWS
Comment 5 2025-09-04 21:20:25 PDT
Committed 299603@main (f3bffa929090): <https://commits.webkit.org/299603@main> Reviewed commits have been landed. Closing PR #50334 and removing active labels.
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