308017 2026-02-16 17:17:20 -0800 SVG patternTransform.baseVal.clear() should cause patternTransform to be ignored 2026-03-11 01:10:36 -0700 1 1 1 Unclassified WebKit SVG WebKit Nightly Build Unspecified Unspecified NEW http://wpt.live/svg/pservers/scripted/pattern-transform-clear.svg InRadar, WPTImpact P2 Normal --- 309642 1 karlcow karlcow sabouhallawa webkit-bug-importer zimmermann oldest_to_newest 2182232 0 karlcow 2026-02-16 17:17:20 -0800 http://wpt.fyi/svg/pservers/scripted/pattern-transform-clear.svg Go to http://wpt.live/svg/pservers/scripted/pattern-transform-clear.svg PASS in Firefox and Chrome FAIL in Safari The markup is <?xml version="1.0" encoding="UTF-8"?> <svg xmlns="http://www.w3.org/2000/svg" xmlns:h="http://www.w3.org/1999/xhtml"> <title>SVG Paint Servers: Clear should cause patternTransform to be ignored.</title> <metadata> <h:link rel="help" href="https://svgwg.org/svg2-draft/pservers.html#PatternElementPatternTransformAttribute"/> <h:link rel="match" href="../reftests/reference/green-100x100.svg"/> </metadata> <pattern id="p1" patternTransform="scale(2)"/> <pattern id="p" href="#p1" viewBox="0 0 50 50" patternTransform="scale(1)" width="100%" height="100%"> <rect fill="red" width="50" height="50"/> <rect fill="green" width="25" height="25"/> </pattern> <rect fill="url(#p)" width="100" height="100"/> <script><![CDATA[ document.getElementById("p").patternTransform.baseVal.clear(); ]]></script> </svg> SVGTransformList is defined as https://w3c.github.io/svgwg/svg2-draft/coords.html#InterfaceSVGTransformList [Exposed=Window] interface SVGTransformList { readonly attribute unsigned long length; readonly attribute unsigned long numberOfItems; undefined clear(); SVGTransform initialize(SVGTransform newItem); getter SVGTransform getItem(unsigned long index); SVGTransform insertItemBefore(SVGTransform newItem, unsigned long index); SVGTransform replaceItem(SVGTransform newItem, unsigned long index); SVGTransform removeItem(unsigned long index); SVGTransform appendItem(SVGTransform newItem); setter undefined (unsigned long index, SVGTransform newItem); // Additional methods not common to other list interfaces. SVGTransform createSVGTransformFromMatrix(optional DOMMatrix2DInit matrix = {}); SVGTransform? consolidate(); }; The clear() method is defined as: https://w3c.github.io/svgwg/svg2-draft/types.html#__svg__SVGNameList__clear > The clear method is used to remove all items in the list. When clear() is called, the following steps are run: > > 1. If the list is read only, then throw a NoModificationAllowedError. > 2. Detach and then remove all elements in the list. > 3. If the list reflects an attribute, or represents the base value of an object that reflects an attribute, then reserialize the reflected attribute. 2182241 1 karlcow 2026-02-16 17:54:48 -0800 This is also failing with LBSE. http://wpt.live/svg/pservers/scripted/pattern-transform-clear.svg 2182250 2 webkit-bug-importer 2026-02-16 18:27:15 -0800 <rdar://problem/170518953> 2182269 3 karlcow 2026-02-16 19:47:46 -0800 Pull request: https://github.com/WebKit/WebKit/pull/58833