NEW250621
Initial container block (ICB) resizes in in-app browsers when scrolling 
https://bugs.webkit.org/show_bug.cgi?id=250621
Summary Initial container block (ICB) resizes in in-app browsers when scrolling
Rogier de Ruijter
Reported 2023-01-14 07:08:40 PST
Created attachment 464498 [details] Video of the ICB changing When this page: https://interop-2022-viewport.netlify.app is opened on an in-app browser on iOS. You can see (also see video in attachment) that when you start scrolling the ICB (the red line) changes size. This is a problem for view height units (vh, svh) since they will resize and your scroll position on the page changes. The preferred behaviour would be that the ICB doesn't change like on Safari mobile.
Attachments
Video of the ICB changing (7.70 MB, video/mp4)
2023-01-14 07:08 PST, Rogier de Ruijter 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Radar WebKit Bug Importer
Comment 1 2023-01-14 07:12:10 PST
<rdar://problem/104260623>
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