[Webkit-unassigned] [Bug 232237] New: Safari smart app banner increases safe bottom offset

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=232237

            Bug ID: 232237
           Summary: Safari smart app banner increases safe bottom offset
           Product: WebKit
           Version: Safari 15
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: e.smirnov at corp.vk.com

Created attachment 442364

  --> https://bugs.webkit.org/attachment.cgi?id=442364&action=review

bug reproducing

We have the bottom tabs bar on our website which is fixed positioned at the bottom. When the user starts scrolling to the top, safari bottom bar and smart app banner start appearing, but the safe bottom offsets are calculating wrong.
On the attached videos you can see debug boxes where yellow is marks "position: fixed" behavior. When I enable the "Safe area margin" checkbox, it would add safe bottom offset to the margin. I've recorded both top and bottom bar positions which were introduced in iOS 15.
https://m.vk.com/?act=_apple_viewport_bug

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.webkit.org/pipermail/webkit-unassigned/attachments/20211025/3c339c0f/attachment.htm>