v27.1.0

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• Improved CSS parsing by switching to@acemir/cssom, including support for nested selectors, nested declarations, layer statements, and improved at-rule validation. (acemir)
• Fixed some selector cache invalidation issues where changes to attributes were not being picked up. (asamuzaK)
• Fixedpackage.json"engines" field to reflect the new minimum Node.js versions needed to run jsdom, as noted in the changelog for v27.0.1.

v27.0.1

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• Fixed some regressions in CSS selectors. Most such regression fixes were done in a minor update of a dependency, and thus available for all fresh installs of v27.0.0. However, one related toclass="" attribute changes is only possible with a new version of jsdom. (asamuzaK)

v27.0.0

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Changes since 26.1.0

• Node.js v20 is now the minimum supported version.
• Added a variety of event constructors, even though we do not implement their associated specifications or ever fire them:BeforeUnloadEvent,BlobEvent,DeviceMotionEvent (omittingrequestPermission()),DeviceOrientationEvent (omittingrequestPermission()),PointerEvent,PromiseRejectionEvent, andTransitionEvent.
• AddedmovementX andmovementY toMouseEvent. (These are from thePointer Lock specification, the rest of which is not implemented.)
• AddedcustomElements.getName(). (mash-graz)
• Updated thevirtual console:
  • "jsdomError" events are now documented, with specifictype properties and other properties that depend on the type.
  • sendTo() was renamed toforwardTo().
  • ThejsdomErrors option toforwardTo() can be used to control which errors are sent to the Node.js console. This replaces the previousomitJSDOMErrors boolean option.
  • "jsdomError"s for failedXMLHttpRequest fetches are no longer emitted.
  • The values that are printed when forwarding"jsdomError"s to the Node.js console are streamlined.
• Switched our CSS selector engine fromnwsapi to@asamuzakjp/dom-selector, closing over 20 selector-related bugs.
• Upgradedtough-cookie, which now considers URLs likehttp://localhost/ to be secure contexts (perthe spec), and thus will returnSecure-flagged cookies for such URLs. (colincasey)
• Upgradedcssstyle, which brings along many improvements and fixes to theCSSStyleDeclaration object and its properties.
• Updated the user agent stylesheet to be derived from the HTML Standard, instead of from an old revision of Chromium.
• Changedelement.click() to fire aPointerEvent instead of aMouseEvent.
• Changed certain events to be passive by default.
• Changed the<input> element'spattern="" attribute to use thev regular expression flag, instead ofu.
• Fixed many specification conformance issues with theWindow object, including named properties and changing various data properties to accessor properties.
• Fixeddocument.createEvent() to accept a more correct set of event names.
• Fixed theElementInternals accessibility getters and setters. (They were introduced in v23.1.0, but due to inadequate test coverage never actually worked.)
• Fixed usingObject.defineProperty() on certain objects, such asHTMLSelectElement instances.
• Fixedjsdom.reconfigure({ url }) not updatingdocument.baseURI or properties derived from it. (This regressed in v26.1.0.)
• Fixed CSS system colors, as well as theinitial,inherit, andunset keywords, to resolve correctly. (asamuzaK)
• Fixed CSSdisplay style resolution. (asamuzaK)

Changes since 27.0.0-beta.3

• Upgradedcssstyle, which brings along various CSS parsing fixes.

v26.1.0

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• 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).
• AddedSVGAnimatedPreserveAspectRatio andSVGAnimatedRect, including support in the reflection layer.
• Added theSVGSVGElementcreateSVGRect() method, and theSVGRect type (which is distinct fromDOMRect.)
• Added indexed property support toHTMLFormElement.
• Updated theSVGElementviewportElement() method to correctly establish the viewport based on ancestor elements.
• Removed the now-bloatedform-data dependency in favor of our own smaller implementation ofmultipart/form-data serialization. No functional changes are expected.
• Various performance improvements, caches, microoptimizations, and deferred object creation.

v26.0.0

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

Other changes:

• AddedAbortSignal.any(). (jdbevan)
• Added initial support for form-associated custom elements, in particular making them labelable and supporting theElementInternalslabels property. The form-associated callbacks are not yet supported. (hesxenon)
• Updatedwhatwg-url, adding support forURL.parse().
• Updatedcssstyle andrrweb-cssom, to improve CSS parsing capabilities.
• Updatednwsapi, improving CSS selector matching.
• Updatedparse5, fixing a bug around<noframes> elements and HTML entity decoding.
• FixedJSDOM.fromURL() to properly reject the returned promise if the server redirects to an invalid URL, instead of causing an uncaught exception.

v25.0.1

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• Updated dependencies, notablytough-cookie, which no longer prints a deprecation warning.