Bug 250621

Summary:

Initial container block (ICB) resizes in in-app browsers when scrolling

Product:

WebKit

Reporter:

Rogier de Ruijter <imbashenk>

Component:

Layout and Rendering

Assignee:

Nobody <webkit-unassigned>

Status:

NEW

Severity:

Normal

CC:

bfulgham, simon.fraser, webkit-bug-importer, zalan

Priority:

Keywords:

InRadar

Version:

Safari 16

Hardware:

iPhone / iPad

OS:

iOS 16

Attachments:

Description	Flags
Video of the ICB changing	none

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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