Version 18.0.0

Potentially-breaking bug fixes:

• Fixed SSL certificate checking for WebSocket connections. Previously, invalid SSL certificates were always accepted; now, they properly respect the ResourceLoader's strictSSL option (which defaults to true).
• Changed the global in which almost all Promise and TypeError instances are created to be the jsdom global, not the Node.js global. This could affect any code that uses instanceof.

Other changes:

• Fixed moving an element between HTML and XML documents to reset the tagName cache, allowing it to return a lowercase value once it's in the XML document. (LucasLefevre)
• Fixed form submission to not happen when the form is invalid. (pozil)

Version 17.0.0

Breaking change: Node v12 is now the minimum supported version.

Version 16.7.0

• Added AbortSignal.abort(). (ninevra)
• Added dummy x and y properties to the return value of getBoundingClientRect(). (eiko)
• Implemented wrapping for textareaEl.value if the wrap="" attribute is specified. (ninevra)
• Changed newline normalization in <textarea>s according to recent HTML Standard updates. (ninevra)
• Fixed some bad cascade computation in getComputedStyle(). (romain-trotard)

Version 16.6.0

• Added parentNode.replaceChildren(). (@ninevra)
• Fixed jsdom's handling of when code running inside the jsdom throws null or undefined as an exception. (@mbest)
• Removed the dependency on the deprecated request package, in the process fixing several issues with the XMLHttpRequest implementation around header processing. Thanks go to @tobyhinloopen, @andrewaylett, and especially @vegardbb, for completing this months-long effort!

Version 16.5.3

• Fixed infinite recursion when using MutationObservers to observe elements inside a MutationObserver callback.

Version 16.5.2

• Fixed Access-Control-Allow-Headers: * to work with XMLHttpRequest. (silviot)
• Fixed xhr.response to strip any leading BOM when xhr.responseType is "json".
• Fixed new Text() and new Comment() constructors to properly set the resulting node's ownerDocument.
• Fixed customElements.whenDefined() to resolve its returned promise with the custom element constructor, per recent spec updates. (ExE-Boss)
• Fixed parsing to ensure that <svg><template></template></svg> does not throw an exception, but instead correctly produces a SVG-namespace <template> element.
• Fixed domParser.parseFromString() to treat <noscript> elements appropriately.
• Fixed form control validity checking when the control was outside the <form> element and instead associated using the form="" attribute.
• Fixed legendEl.form to return the correct result based on its parent <fieldset>.
• Fixed optionEl.text to exclude <script> descendants.
• Fixed radio buttons and checkboxes to not fire input and change events when disconnected.
• Fixed inputEl.indeterminate to reset to its previous value when canceling a click event on a checkbox or radio button.
• Fixed the behavior of event handler attributes (e.g. onclick="...code...") when there were global variables named element or formOwner. (ExE-Boss)
• On Node.js v14.6.0+ where WeakRefs are available, fixed NodeIterator to no longer stop working when more than ten NodeIterator instances are created, and to use less memory due to inactive NodeIterators sticking around. (ExE-Boss)

Version 16.5.1

• Fixed a regression that broke customElements.get() in v16.5.0. (fdesforges)
• Fixed window.event to have a setter which overwrites the window.event property with the given value, per the specification. This fixes an issue where after upgrading to jsdom v16.5.0 you would no longer be able to set a global variable named event in the jsdom context.

Version 16.5.0

• Added window.queueMicrotask().
• Added window.event.
• Added inputEvent.inputType. (diegohaz)
• Removed ondragexit from Window and friends, per a spec update.
• Fixed the URL of about:blank iframes. Previously it was getting set to the parent's URL. (SimonMueller)
• Fixed the loading of subresources from the filesystem when they had non-ASCII filenames.
• Fixed the hidden="" attribute to cause display: none per the user-agent stylesheet. (ph-fritsche)
• Fixed the new File() constructor to no longer convert / to :, per a pending spec update.
• Fixed mutation observer callbacks to be called with the MutationObserver instance as their this value.
• Fixed <input type=checkbox> and <input type=radio> to be mutable even when disabled, per a spec update.
• Fixed XMLHttpRequest to not fire a redundant final progress event if a progress event was previously fired with the same loaded value. This would usually occur with small files.
• Fixed XMLHttpRequest to expose the Content-Length header on cross-origin responses.
• Fixed xhr.response to return null for failures that occur during the middle of the download.
• Fixed edge cases around passing callback functions or event handlers. (ExE-Boss)
• Fixed edge cases around the properties of proxy-like objects such as localStorage or dataset. (ExE-Boss)
• Fixed a potential memory leak with custom elements (although we could not figure out how to trigger it). (soncodi)

Version 16.4.0

• Added a not-implemented warning if you try to use the second pseudo-element argument to getComputedStyle(), unless you pass a ::part or ::slotted pseudo-element, in which case we throw an error per the spec. (ExE-Boss)
• Improved the performance of repeated access to el.tagName, which also indirectly improves performance of selector matching and style computation. (eps1lon)
• Fixed form.elements to respect the form="" attribute, so that it can contain non-descendant form controls. (ccwebdesign)
• Fixed el.focus() to do nothing on disconnected elements. (eps1lon)
• Fixed el.focus() to work on SVG elements. (zjffun)
• Fixed removing the currently-focused element to move focus to the <body> element. (eps1lon)
• Fixed imgEl.complete to return true for <img> elements with empty or unset src="" attributes. (strager)
• Fixed imgEl.complete to return true if an error occurs loading the <img>, when canvas is enabled. (strager)
• Fixed imgEl.complete to return false if the <img> element's src="" attribute is reset. (strager)
• Fixed the valueMissing validation check for <input type="radio">. (zjffun)
• Fixed translate="" and draggable="" attribute processing to use ASCII case-insensitivity, instead of Unicode case-insensitivity. (zjffun)

Version 16.3.0

• Added firing of focusin and focusout when using el.focus() and el.blur(). (trueadm)
• Fixed elements with the contenteditable="" attribute to be considered as focusable. (jamieliu386)
• Fixed window.NodeFilter to be per-Window, instead of shared across all Windows. (ExE-Boss)
• Fixed edge-case behavior involving use of objects with handleEvent properties as event listeners. (ExE-Boss)
• Fixed a second failing image load sometimes firing a load event instead of an error event, when the canvas package is installed. (strager)
• Fixed drawing an empty canvas into another canvas. (zjffun)