Bug 196824

Summary:	scroll-snap-type is not functioning when child element can be scrolled too
Product:	WebKit	Reporter:	Edwin Martin <edwin>
Component:	Scrolling	Assignee:	Nobody <webkit-unassigned>
Status:	RESOLVED WORKSFORME
Severity:	Normal	CC:	edwin, mrobinson, simon.fraser, webkit-bug-importer, wenson_hsieh
Priority:	P2	Keywords:	InRadar
Version:	Safari 12
Hardware:	All
OS:	Unspecified
URL:	https://codepen.io/edwinm/pen/BERXpG
Bug Depends on:
Bug Blocks:	218115

Description Edwin Martin 2019-04-11 12:15:37 PDT

Overview:

Codepen to demonstrate this bug:
https://codepen.io/edwinm/pen/BERXpG

1) Horizontal scrolling with scroll-snap-type works fine
2) When child elements itself can scroll vertically, scroll-snap-type in parent element does not work anymore.

In Codepen, toggle scrolling of child elements (line 25 in CSS) to see effect on scroll-snap-type in parent element.

Steps to Reproduce:

- Open Codepen
- Swipe horizontally

Actual Results

- scroll-snap-type does not work, columns with different colors stay visible

Expected Results:

- scroll-snap-type does work, element scrolls to position with only one column of only one color visible.

Build Date & Hardware:

Safari 12.1 on macOS 10.14.4
Safari on iOS 12.2

Additional Builds and Platforms:

-

Additional Information:

Works in macOS Chrome 73.0.3683.103

Comment 1 Radar WebKit Bug Importer 2019-04-12 10:28:50 PDT

<rdar://problem/49855348>

Comment 2 Martin Robinson 2021-01-20 07:28:31 PST

This seems to be working for me, but feel free to reopen this if it's still an issue.