Sourced from jsdom's releases.

Version 26.1.0

• Added at least partial support for various SVG elements and their classes: <defs> (SVGDefsElement), <desc> (SVGDescElement), <g> (SVGGElement), <metadata> (SVGMetadataElement), <switch> (SVGSwitchElement), and <symbol> (SVGSymbolElement).
• Added SVGAnimatedPreserveAspectRatio and SVGAnimatedRect, including support in the reflection layer.
• Added the SVGSVGElement createSVGRect() method, and the SVGRect type (which is distinct from DOMRect.)
• Added indexed property support to HTMLFormElement.
• Updated the SVGElement viewportElement() method to correctly establish the viewport based on ancestor elements.
• Removed the now-bloated form-data dependency in favor of our own smaller implementation of multipart/form-data serialization. No functional changes are expected.
• Various performance improvements, caches, microoptimizations, and deferred object creation.

Version 26.0.0

Breaking change: canvas peer dependency requirement has been upgraded from v2 to v3. (sebastianwachter)

Other changes:

• Added AbortSignal.any(). (jdbevan)
• Added initial support for form-associated custom elements, in particular making them labelable and supporting the ElementInternals labels property. The form-associated callbacks are not yet supported. (hesxenon)
• Updated whatwg-url, adding support for URL.parse().
• Updated cssstyle and rrweb-cssom, to improve CSS parsing capabilities.
• Updated nwsapi, improving CSS selector matching.
• Updated parse5, fixing a bug around <noframes> elements and HTML entity decoding.
• Fixed JSDOM.fromURL() to properly reject the returned promise if the server redirects to an invalid URL, instead of causing an uncaught exception.

Sourced from jsdom's changelog.

26.1.0

• Added at least partial support for various SVG elements and their classes: <defs> (SVGDefsElement), <desc> (SVGDescElement), <g> (SVGGElement), <metadata> (SVGMetadataElement), <switch> (SVGSwitchElement), and <symbol> (SVGSymbolElement).
• Added SVGAnimatedPreserveAspectRatio and SVGAnimatedRect, including support in the reflection layer.
• Added the SVGSVGElement createSVGRect() method, and the SVGRect type (which is distinct from DOMRect.)
• Added indexed property support to HTMLFormElement.
• Updated the SVGElement viewportElement() method to correctly establish the viewport based on ancestor elements.
• Removed the now-bloated form-data dependency in favor of our own smaller implementation of multipart/form-data serialization. No functional changes are expected.
• Various performance improvements, caches, microoptimizations, and deferred object creation.

26.0.0

Breaking change: canvas peer dependency requirement has been upgraded from v2 to v3. (sebastianwachter)

Other changes:

• Added AbortSignal.any(). (jdbevan)
• Added initial support for form-associated custom elements, in particular making them labelable and supporting the ElementInternals labels property. The form-associated callbacks are not yet supported. (hesxenon)
• Updated whatwg-url, adding support for URL.parse().
• Updated cssstyle and rrweb-cssom, to improve CSS parsing capabilities.
• Updated nwsapi, improving CSS selector matching.
• Updated parse5, fixing a bug around <noframes> elements and HTML entity decoding.
• Fixed JSDOM.fromURL() to properly reject the returned promise if the server redirects to an invalid URL, instead of causing an uncaught exception.

• 1911c80 Version 26.1.0
• ea6e851 Add failing script execution order test
• 2be9dcf Add passing tests for CSS parsing errors
• 9c68fe3 Add failing CSS container queries test
• 501b1cc Add failing CSS cascade layer test
• 1916583 Add passing font-face with a data URL parsing test
• fc2a337 Add passing javascript: URL href test
• 91c610d Move to-upstream CSS tests to correct directory
• a5be813 Add failing calc() serialization test
• 326745d Add passing oklch() serialization test
• Additional commits viewable in compare view

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