[Webkit-unassigned] [Bug 243538] New: placeholderCanvas.setAtttribute(width) messes the CSSOM boxes

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=243538

            Bug ID: 243538
           Summary: placeholderCanvas.setAtttribute(width) messes the
                    CSSOM boxes
           Product: WebKit
           Version: Safari 15
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: zlip.792 at gmail.com

Created attachment 461397

  --> https://bugs.webkit.org/attachment.cgi?id=461397&action=review

Reference Screenshot (of Safari 15.6)

Hi Team,

I am going through Chrome Bugs and noticed following test case, which is broken in Safari 15.6 on macOS 12.5 and it does not show any boxes etc.

Test Case Link - https://jsfiddle.net/brc580sz/show

Chrome Bug - https://bugs.chromium.org/p/chromium/issues/detail?id=1314583

*** STEPS TO REPRODUCE ***

1) Open JSFiddle and run

>> EXPECTED RESULT:

It should show the outlines etc.

>> ACTUAL RESULT:

Safari does not show outlines etc. like other browsers (Chrome Canary 106 & Firefox Nightly 105)

____

Please refer to attached screenshot as reference and also if it is fixed in upstream Webkit Nightly then please ignore and mark it as Duplicate.

Thanks

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