[Webkit-unassigned] [Bug 181234] New: In the grid, changing the text of the cell below resets the scroll position of the overflow cell above it

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Tue Jan 2 23:36:31 PST 2018


https://bugs.webkit.org/show_bug.cgi?id=181234

            Bug ID: 181234
           Summary: In the grid, changing the text of the cell below
                    resets the scroll position of the overflow cell above
                    it
           Product: WebKit
           Version: Safari 11
          Hardware: Macintosh
                OS: macOS 10.12
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: igor.afanasyev at gmail.com
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com

Created attachment 330367

  --> https://bugs.webkit.org/attachment.cgi?id=330367&action=review

test case

I can reproduce this issue both on Safari 11.0.2 and Chrome 63.0.3239.84 on Mac OS 10.12.6.

The minimal reproducible code is attached (index.html):

Steps to reproduce:
1) Open index.html.
2) Open Web inspector.
3) Drag the 'scroll me' scrollbar to the right so that 'scroll me' text disappears.
4) In the inspector, change 'edit me' to e.g. 'x'.

Expected: scrollbar retains its position.

Observed: scrollbar resets the position (scrolls back to the left).

Other notes: changing the height of the scrollable container seems to affect how much to the left the scrollbar is rewound.

This issue seems to be somewhat related to https://bugs.webkit.org/show_bug.cgi?id=176458

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