[Webkit-unassigned] [Bug 188558] New: CSS transition with CSS transform exhibits unintended jitter

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Tue Aug 14 09:52:38 PDT 2018


https://bugs.webkit.org/show_bug.cgi?id=188558

            Bug ID: 188558
           Summary: CSS transition with CSS transform exhibits unintended
                    jitter
           Product: WebKit
           Version: Safari 11
          Hardware: iPhone / iPad
                OS: iOS 11
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: eugene at with.in

Created attachment 347085

  --> https://bugs.webkit.org/attachment.cgi?id=347085&action=review

HTML file for reduced test case

Steps to reproduce the problem:
1. Open index.html Page Attached
2.A. Click on "<" or ">" to initiate CSS transition / transform
2.B. Or on Mobile touchmove along the lettered elements to initiate CSS transition / transform

What is the expected behavior?
The expected behavior is a smooth transition of the lettered elements.

What went wrong?
The transition occurs but it is not smooth. See video for jitter reproduction.

Did this work before? N/A 

Does this work in other browsers? Yes

Video reference:
https://drive.google.com/open?id=1XpZ1f7_A6c2jytFJ0rwM4lFAYmHl9Ng4

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