[Webkit-unassigned] [Bug 268363] New: [SVG] baseval.value of an SVG element nested inside a symbol returns an error

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=268363

            Bug ID: 268363
           Summary: [SVG] baseval.value of an SVG element nested inside a
                    symbol returns an error
           Product: WebKit
           Version: Safari 17
          Hardware: Unspecified
               URL: https://wpt.fyi/results/svg/geometry/svg-baseval-in-di
                    splay-none.html
                OS: Unspecified
            Status: NEW
          Keywords: BrowserCompat, WPTImpact
          Severity: Normal
          Priority: P2
         Component: SVG
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: karlcow at apple.com
                CC: ahmad.saleem792 at gmail.com, sabouhallawa at apple.com,
                    webkit-bug-importer at group.apple.com,
                    zimmermann at kde.org

https://codepen.io/webcompat/pen/Jjzpogz

  <svg>
    <symbol>
      <g>
        <rect id="r1" width="20%" height="30%" />
      </g>
    </symbol>
  </svg>


the width of the rect returns:

Safari:
=======================================
width.baseVal.valueAsString: 20%
width.baseVal.valueInSpecifiedUnits: 20
=======================================
with an error message in the console:
NotSupportedError: The operation is not supported.


Firefox:
=======================================
width.baseVal.valueAsString: 20%
width.baseVal.valueInSpecifiedUnits: 20
width.baseVal.value: 60
=======================================


If you remove the symbol element, it returns the correct result:
Safari:
=======================================
width.baseVal.valueAsString: 20%
width.baseVal.valueInSpecifiedUnits: 20
width.baseVal.value: 60
=======================================


Because of this, WebKit fails
https://wpt.fyi/results/svg/geometry/svg-baseval-in-display-none.html

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