Bug 215641 - Vertical scrolling gets stuck when a horizontal scroller is under the mouse (google search results)
Summary: Vertical scrolling gets stuck when a horizontal scroller is under the mouse (...
Status: RESOLVED FIXED
Alias: None
Product: WebKit
Classification: Unclassified
Component: Scrolling (show other bugs)
Version: Safari Technology Preview
Hardware: Mac macOS 10.15
: P2 Normal
Assignee: Simon Fraser (smfr)
URL:
Keywords: InRadar
Depends on:
Blocks:
 
Reported: 2020-08-18 23:33 PDT by Mehmet
Modified: 2020-08-28 14:15 PDT (History)
9 users (show)

See Also:

Attachments
Vertical scrolling lag (8.97 MB, video/quicktime)
2020-08-18 23:33 PDT, Mehmet 		no flags Details
Patch (18.34 KB, patch)
2020-08-27 22:24 PDT, Simon Fraser (smfr) 		no flags Details | Formatted Diff | Diff
Patch (20.29 KB, patch)
2020-08-27 23:38 PDT, Simon Fraser (smfr) 		no flags Details | Formatted Diff | Diff
Patch (24.82 KB, patch)
2020-08-28 12:07 PDT, Simon Fraser (smfr) 		thorton: review+
Details | Formatted Diff | Diff
Show Obsolete (2) View All Add an attachment (proposed patch, testcase, etc.)

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Description Mehmet 2020-08-18 23:33:53 PDT 
Created attachment 406829 [details]
Vertical scrolling lag

Safari Technology Preview
Release 112 (Safari 14.0, WebKit 15610.1.25.5.1)

OS: macOS 10.15.6
Type: Regression


Steps to reproduce:

1.) go to google.com
2.) search for "apple"
3.) scroll down until you see the video section, where you can scroll horizontally
4.) now move the mouse cursor over this box and try to scroll vertically up or down to the page

Actual result: Vertical scrolling lags, because it wants to scroll also horizontally.

Expected result: Vertical scrolling should not lag.

This seems to be a regression in Safari Technology Preview 14. This is not a problem in Safari Stable Version 13.1.2 (15609.3.5.1.3).

A screencast of the issue is attached.

Thanks for fixing it in advance.
Comment 1 Radar WebKit Bug Importer 2020-08-19 15:23:06 PDT 
<rdar://problem/67430532>
Comment 2 Simon Fraser (smfr) 2020-08-27 22:24:55 PDT 
Created attachment 407451 [details]
Patch
Comment 3 Simon Fraser (smfr) 2020-08-27 23:38:00 PDT 
Created attachment 407452 [details]
Patch
Comment 4 Simon Fraser (smfr) 2020-08-28 12:07:25 PDT 
Created attachment 407494 [details]
Patch
Comment 5 Simon Fraser (smfr) 2020-08-28 14:15:34 PDT 
https://trac.webkit.org/r266292