[Webkit-unassigned] [Bug 279450] New: Table layout inconsistency with <td withd="100%">

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=279450

            Bug ID: 279450
           Summary: Table layout inconsistency with <td withd="100%">
           Product: WebKit
           Version: Safari 18
          Hardware: All
                OS: macOS 15
            Status: NEW
          Severity: Critical
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: php4fan at gmail.com
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com

Created attachment 472516

  --> https://bugs.webkit.org/attachment.cgi?id=472516&action=review

screenshot safari

Visit this url in Safari on Mac OS: https://opentarget.org/test/testtable.html

Now check the same url in Chrome, Firefox or Opera.

Expected: they should look the same
Observed: they look different (see screenshots).

In particular, note the <td> element in the first table with a pink background.
It has a width="100%" attribute.

In every other browser, this causes the table to stretch to the entire width of the containing div, which is in turn determined by the width of the second table.

But in Safari, the width="100%" on the TD has no effect whatsoever, and the td only occupies whatever space is needed to fit its content (a blank space).

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