Bug 227580

Summary:

Full page scroll snap breaks in iOS Safari 15

Product:

WebKit

Reporter:

Johannes Odland <johannes.odland>

Component:

Scrolling

Assignee:

Nobody <webkit-unassigned>

Status:

RESOLVED DUPLICATE

Severity:

Normal

CC:

mrobinson, simon.fraser

Priority:

Version:

Other

Hardware:

iPhone / iPad

OS:

Other

Attachments:

Description	Flags
Movie showing page snapping back to first snap target	none

Description Johannes Odland 2021-07-01 04:19:23 PDT

Created attachment 432677 [details]
Movie showing page snapping back to first snap target

Detected in Safari iOS 15 simulator

How to reproduce:

1. Go to a page with `html {scroll-snap-type: y mandatory;}` and snap target elements sized in vh, such as this codepen: https://codepen.io/johannesodland/pen/zYwGvXx
2. Try to scroll down

Expected result:
Page snaps to next scroll target element

Actual result:
Page snaps back to first target element


The bug might be caused by vh units updating as the user scrolls in iOS 15.

This works fine in 14.5

Comment 1 Simon Fraser (smfr) 2021-07-01 11:04:45 PDT


*** This bug has been marked as a duplicate of bug 226816 ***