{
  "schema": 1,
  "date": "2026-10-19T17:05:29.553Z",
  "node": "v22.23.3",
  "engines": [
    {
      "key": "warpdom@0.1.6",
      "engine": "warpdom",
      "package": "warpdom",
      "version": "0.1.6",
      "setup": "createWindow({ url: 'http://localhost/' })"
    },
    {
      "key": "happy-dom@21.0.3",
      "engine": "happy-dom",
      "package": "happy-dom",
      "version": "21.0.3",
      "setup": "new Window({ url: 'http://localhost/' })"
    },
    {
      "key": "jsdom@30.1.3",
      "engine": "jsdom",
      "package": "jsdom",
      "version": "30.1.3",
      "setup": "new JSDOM(html, { url: 'http://localhost/', pretendToBeVisual: true })"
    },
    {
      "key": "linkedom@0.18.13",
      "engine": "linkedom",
      "package": "linkedom",
      "version": "0.18.13",
      "setup": "parseHTML(html)"
    }
  ],
  "apis": [
    {
      "id": "abort-signal",
      "title": "AbortController / AbortSignal.timeout()",
      "summary": "Cancels asynchronous work through a signal; AbortSignal.timeout() and any() create signals that abort on their own.",
      "spec": "https://dom.spec.whatwg.org/#interface-abortcontroller",
      "existsDescription": "typeof window.AbortController is defined.",
      "nodeGlobal": "AbortController",
      "workaround": null,
      "interfaces": [
        "AbortController",
        "AbortSignal"
      ],
      "checks": [
        {
          "id": "abort-reason",
          "description": "abort() fires \"abort\" and sets signal.reason to an \"AbortError\" DOMException.",
          "spec": "https://dom.spec.whatwg.org/#dom-abortcontroller-abort"
        },
        {
          "id": "timeout",
          "description": "AbortSignal.timeout(10) aborts with a \"TimeoutError\" DOMException.",
          "spec": "https://dom.spec.whatwg.org/#dom-abortsignal-timeout"
        },
        {
          "id": "any",
          "description": "AbortSignal.any([a, b]) aborts when one of its inputs aborts, with that reason.",
          "spec": "https://dom.spec.whatwg.org/#dom-abortsignal-any"
        }
      ]
    },
    {
      "id": "computed-style",
      "title": "getComputedStyle()",
      "summary": "Returns the computed values of all CSS properties of an element after the cascade and inheritance.",
      "spec": "https://drafts.csswg.org/cssom/#dom-window-getcomputedstyle",
      "existsDescription": null,
      "nodeGlobal": null,
      "workaround": null,
      "interfaces": [],
      "checks": [
        {
          "id": "stylesheet-rule",
          "description": "A rule from a <style> element applies: .hidden { display: none } gives display \"none\".",
          "spec": "https://drafts.csswg.org/css-cascade/#cascade"
        },
        {
          "id": "inherited",
          "description": "An inherited property set on the parent (color: red) computes to \"rgb(255, 0, 0)\" on the child.",
          "spec": "https://drafts.csswg.org/css-cascade/#inheriting"
        },
        {
          "id": "initial-and-default",
          "description": "Values not set by the page use the initial or user-agent value: a <div> has display \"block\", a <span> has visibility \"visible\".",
          "spec": "https://drafts.csswg.org/css-cascade/#initial-value"
        }
      ]
    },
    {
      "id": "constraint-validation",
      "title": "checkValidity() / validity",
      "summary": "Form constraint validation: the ValidityState flags, checkValidity() and custom messages.",
      "spec": "https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#the-constraint-validation-api",
      "existsDescription": "An <input> has checkValidity() and a validity object.",
      "nodeGlobal": null,
      "workaround": null,
      "interfaces": [
        "ValidityState"
      ],
      "checks": [
        {
          "id": "value-missing",
          "description": "An empty required input has validity.valueMissing true; checkValidity() returns false and fires \"invalid\".",
          "spec": "https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#dom-cva-checkvalidity"
        },
        {
          "id": "type-mismatch",
          "description": "An email input with value \"x\" has validity.typeMismatch true.",
          "spec": "https://html.spec.whatwg.org/multipage/input.html#email-state-(type=email)"
        },
        {
          "id": "custom-validity",
          "description": "setCustomValidity(\"Bad\") sets validity.customError and validationMessage \"Bad\".",
          "spec": "https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#dom-cva-setcustomvalidity"
        },
        {
          "id": "pattern-mismatch",
          "description": "pattern=\"[0-9]+\" with value \"a1\" (set by script) gives validity.patternMismatch true. HTML §4.10.5.3.6 (the pattern attribute): \"If the element's value is not the empty string, … and the element has a compiled pattern regular expression but that regular expression does not match the element's value, then the element is suffering from a pattern mismatch\"; the pattern is anchored as ^(?:[0-9]+)$, and nothing here depends on how the value was set.",
          "spec": "https://html.spec.whatwg.org/multipage/input.html#the-pattern-attribute"
        },
        {
          "id": "too-short-script-value",
          "description": "minLength does not apply to a value set by script: minLength 5 and value \"a1\" set by script leave validity.tooShort false. HTML §4.10.19.4 (the minlength attribute): an element is suffering from being too short only if \"its dirty value flag is true, its value was last changed by a user edit (as opposed to a change made by a script), its value is not the empty string, and the length of the element's API value is less than the element's minimum allowed value length\".",
          "spec": "https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#setting-minimum-input-length-requirements:-the-minlength-attribute"
        }
      ]
    },
    {
      "id": "crypto",
      "title": "crypto.getRandomValues() / randomUUID()",
      "summary": "Cryptographically strong random bytes and random version 4 UUIDs.",
      "spec": "https://w3c.github.io/webcrypto/#Crypto-method-getRandomValues",
      "existsDescription": "typeof window.crypto is defined.",
      "nodeGlobal": "crypto",
      "workaround": "Node.js has a Web Crypto global (globalThis.crypto) since 19; a setup file can assign it to the test global.",
      "interfaces": [
        "Crypto"
      ],
      "checks": [
        {
          "id": "get-random-values",
          "description": "getRandomValues(array) fills the array and returns the same array.",
          "spec": "https://w3c.github.io/webcrypto/#Crypto-method-getRandomValues"
        },
        {
          "id": "random-uuid",
          "description": "randomUUID() returns a lowercase version 4 UUID string.",
          "spec": "https://w3c.github.io/webcrypto/#Crypto-method-randomUUID"
        }
      ]
    },
    {
      "id": "css-custom-properties",
      "title": "CSS custom properties (--*) and var()",
      "summary": "Author-defined properties that inherit and are substituted with var().",
      "spec": "https://drafts.csswg.org/css-variables/#defining-variables",
      "existsDescription": "element.style has setProperty() and getPropertyValue().",
      "nodeGlobal": null,
      "workaround": null,
      "interfaces": [],
      "checks": [
        {
          "id": "inline-roundtrip",
          "description": "style.setProperty(\"--gap\", \"10px\") is read back by style.getPropertyValue(\"--gap\").",
          "spec": "https://drafts.csswg.org/cssom/#dom-cssstyledeclaration-setproperty"
        },
        {
          "id": "computed-inherited",
          "description": "A custom property from a stylesheet rule on the parent is inherited: getComputedStyle(child).getPropertyValue(\"--gap\") is \"10px\".",
          "spec": "https://drafts.csswg.org/css-variables/#defining-variables"
        },
        {
          "id": "var-substitution",
          "description": "color: var(--c) with --c: red computes to \"rgb(255, 0, 0)\".",
          "spec": "https://drafts.csswg.org/css-variables/#using-variables"
        }
      ]
    },
    {
      "id": "css-has",
      "title": "CSS :has() in selectors",
      "summary": "The relational pseudo-class: matches an element when a relative selector matches something around it.",
      "spec": "https://drafts.csswg.org/selectors-4/#relational",
      "existsDescription": "document.querySelector(\":has(*)\") does not throw a SyntaxError.",
      "nodeGlobal": null,
      "workaround": null,
      "interfaces": [],
      "checks": [
        {
          "id": "descendant",
          "description": "querySelectorAll(\"div:has(.x)\") matches both divs that contain a .x descendant.",
          "spec": "https://drafts.csswg.org/selectors-4/#relational"
        },
        {
          "id": "child-combinator",
          "description": "querySelectorAll(\"div:has(> .x)\") matches only the div with a .x child.",
          "spec": "https://drafts.csswg.org/selectors-4/#relational"
        },
        {
          "id": "matches-closest",
          "description": "element.matches(\":has(.x)\") and element.closest(\":has(> p)\") use :has() as well.",
          "spec": "https://dom.spec.whatwg.org/#dom-element-closest"
        }
      ]
    },
    {
      "id": "custom-elements",
      "title": "customElements.define() and lifecycle callbacks",
      "summary": "Autonomous custom elements: registration, upgrade and the connected, disconnected and attributeChanged callbacks.",
      "spec": "https://html.spec.whatwg.org/multipage/custom-elements.html",
      "existsDescription": "window.customElements.define is a function.",
      "nodeGlobal": null,
      "workaround": null,
      "interfaces": [
        "CustomElementRegistry"
      ],
      "checks": [
        {
          "id": "connected-disconnected",
          "description": "connectedCallback runs on insertion into the document and disconnectedCallback on removal.",
          "spec": "https://html.spec.whatwg.org/multipage/custom-elements.html#custom-element-reactions"
        },
        {
          "id": "attribute-changed",
          "description": "attributeChangedCallback(name, old, new) runs for attributes listed in observedAttributes only.",
          "spec": "https://html.spec.whatwg.org/multipage/custom-elements.html#concept-custom-element-definition-observed-attributes"
        },
        {
          "id": "upgrade",
          "description": "An element parsed before define() is upgraded when its definition arrives; whenDefined() and get() see it.",
          "spec": "https://html.spec.whatwg.org/multipage/custom-elements.html#upgrades"
        }
      ]
    },
    {
      "id": "dialog",
      "title": "<dialog> showModal() / close()",
      "summary": "The dialog element and its methods for opening it as a modal and closing it with a return value.",
      "spec": "https://html.spec.whatwg.org/multipage/interactive-elements.html#the-dialog-element",
      "existsDescription": "HTMLDialogElement exists and a <dialog> has showModal().",
      "nodeGlobal": null,
      "workaround": null,
      "interfaces": [
        "HTMLDialogElement"
      ],
      "checks": [
        {
          "id": "show-modal-opens",
          "description": "showModal() on a connected dialog sets .open to true and adds the open attribute.",
          "spec": "https://html.spec.whatwg.org/multipage/interactive-elements.html#dom-dialog-showmodal"
        },
        {
          "id": "close-return-value",
          "description": "close(\"done\") clears open, sets returnValue to \"done\" and fires a \"close\" event.",
          "spec": "https://html.spec.whatwg.org/multipage/interactive-elements.html#close-the-dialog"
        },
        {
          "id": "disconnected-throws",
          "description": "showModal() on a dialog that is not in a document throws an \"InvalidStateError\" DOMException.",
          "spec": "https://html.spec.whatwg.org/multipage/interactive-elements.html#dom-dialog-showmodal"
        }
      ]
    },
    {
      "id": "form-data",
      "title": "new FormData(form)",
      "summary": "Builds the form data set of a form the way submission would.",
      "spec": "https://xhr.spec.whatwg.org/#dom-formdata",
      "existsDescription": "typeof window.FormData is defined.",
      "nodeGlobal": "FormData",
      "workaround": null,
      "interfaces": [
        "FormData"
      ],
      "checks": [
        {
          "id": "controls",
          "description": "Includes text inputs, checked checkboxes and selected options; skips unchecked, disabled and unnamed controls.",
          "spec": "https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#constructing-the-form-data-set"
        },
        {
          "id": "submitter",
          "description": "new FormData(form, submitter) includes the submitter button's name and value.",
          "spec": "https://xhr.spec.whatwg.org/#dom-formdata"
        }
      ]
    },
    {
      "id": "inner-text",
      "title": "element.innerText",
      "summary": "The rendered text of an element (line breaks, hidden content left out) and a setter that turns newlines into <br>.",
      "spec": "https://html.spec.whatwg.org/multipage/dom.html#the-innertext-idl-attribute",
      "existsDescription": "\"innerText\" in element.",
      "nodeGlobal": null,
      "workaround": null,
      "interfaces": [],
      "checks": [
        {
          "id": "br-newline",
          "description": "For a connected <p>a<br>b</p>, innerText is \"a\\nb\".",
          "spec": "https://html.spec.whatwg.org/multipage/dom.html#the-innertext-idl-attribute"
        },
        {
          "id": "display-none-skipped",
          "description": "Text inside a display: none child is left out: <div>a<span style=\"display:none\">b</span></div> gives \"a\".",
          "spec": "https://html.spec.whatwg.org/multipage/dom.html#rendered-text-collection-steps"
        },
        {
          "id": "setter-br",
          "description": "Setting innerText = \"a\\nb\" produces the children a, <br>, b.",
          "spec": "https://html.spec.whatwg.org/multipage/dom.html#set-the-inner-text-steps"
        }
      ]
    },
    {
      "id": "intersection-observer",
      "title": "IntersectionObserver",
      "summary": "Reports when observed elements enter or leave the viewport or a root element.",
      "spec": "https://w3c.github.io/IntersectionObserver/#intersection-observer-interface",
      "existsDescription": null,
      "nodeGlobal": null,
      "workaround": "Tests usually replace it with a mock class (for example the \"react-intersection-observer/test-utils\" helpers or a hand-written stub).",
      "interfaces": [
        "IntersectionObserver"
      ],
      "checks": [
        {
          "id": "defaults",
          "description": "A new observer has root null, rootMargin \"0px 0px 0px 0px\" and thresholds [0]. Intersection Observer §2.2: root is \"null if none was provided\"; rootMargin: \"If no rootMargin was passed to the IntersectionObserver constructor, the value of this attribute is '0px 0px 0px 0px'\"; §3.2.1 (initialize a new IntersectionObserver): \"If thresholds is empty, append 0 to thresholds.\"",
          "spec": "https://w3c.github.io/IntersectionObserver/#dom-intersectionobserver-intersectionobserver"
        },
        {
          "id": "initial-notification",
          "description": "Observing a connected element delivers an initial entry for it with an isIntersecting boolean, whether or not it intersects. Intersection Observer §3.2.2 (observe a target Element) registers it with \"a previousThresholdIndex property set to -1\"; §3.2.10 (update intersection observations) computes a thresholdIndex of 0 or more and \"If thresholdIndex does not equal previousThresholdIndex … queue an IntersectionObserverEntry\". HTML runs these steps in \"update the rendering\", and §3.4.2 forbids skipping that update while a target has had no entry yet.",
          "spec": "https://w3c.github.io/IntersectionObserver/#update-intersection-observations-algo"
        }
      ]
    },
    {
      "id": "match-media",
      "title": "window.matchMedia()",
      "summary": "Evaluates a media query and returns a MediaQueryList that reports changes.",
      "spec": "https://drafts.csswg.org/cssom-view/#dom-window-matchmedia",
      "existsDescription": null,
      "nodeGlobal": null,
      "workaround": "A common pattern is to define window.matchMedia in a setup file with a function returning { matches: false, media, addEventListener() {}, removeEventListener() {} } (shown in the Jest documentation).",
      "interfaces": [
        "MediaQueryList"
      ],
      "checks": [
        {
          "id": "all-matches",
          "description": "matchMedia(\"all\").matches is true and matchMedia(\"not all\").matches is false.",
          "spec": "https://drafts.csswg.org/cssom-view/#dom-mediaquerylist-matches"
        },
        {
          "id": "media-query-list",
          "description": "The result has a serialized .media and supports addEventListener(\"change\", ...).",
          "spec": "https://drafts.csswg.org/cssom-view/#mediaquerylist"
        }
      ]
    },
    {
      "id": "mutation-observer",
      "title": "MutationObserver",
      "summary": "Reports changes to the DOM tree (children, attributes, text) as batched records.",
      "spec": "https://dom.spec.whatwg.org/#interface-mutationobserver",
      "existsDescription": null,
      "nodeGlobal": null,
      "workaround": null,
      "interfaces": [
        "MutationObserver"
      ],
      "checks": [
        {
          "id": "child-list-async",
          "description": "An appendChild() is reported asynchronously (not during the call) as one \"childList\" record.",
          "spec": "https://dom.spec.whatwg.org/#queue-a-mutation-observer-compound-microtask"
        },
        {
          "id": "attribute-old-value",
          "description": "With attributeOldValue, an attribute change record carries attributeName and oldValue.",
          "spec": "https://dom.spec.whatwg.org/#dom-mutationobserverinit-attributeoldvalue"
        },
        {
          "id": "take-records",
          "description": "takeRecords() returns pending records synchronously and empties the queue.",
          "spec": "https://dom.spec.whatwg.org/#dom-mutationobserver-takerecords"
        }
      ]
    },
    {
      "id": "request-animation-frame",
      "title": "requestAnimationFrame()",
      "summary": "Schedules a callback before the next repaint.",
      "spec": "https://html.spec.whatwg.org/multipage/imagebitmap-and-animations.html#animation-frames",
      "existsDescription": null,
      "nodeGlobal": null,
      "workaround": null,
      "interfaces": [],
      "checks": [
        {
          "id": "callback-timestamp",
          "description": "The callback runs (asynchronously) with a numeric timestamp.",
          "spec": "https://html.spec.whatwg.org/multipage/imagebitmap-and-animations.html#dom-animationframeprovider-requestanimationframe"
        },
        {
          "id": "cancel",
          "description": "cancelAnimationFrame(handle) stops a scheduled callback from running.",
          "spec": "https://html.spec.whatwg.org/multipage/imagebitmap-and-animations.html#dom-animationframeprovider-cancelanimationframe"
        }
      ]
    },
    {
      "id": "request-submit",
      "title": "form.requestSubmit()",
      "summary": "Submits a form as if a submit button were clicked: validation runs and a cancelable \"submit\" event fires.",
      "spec": "https://html.spec.whatwg.org/multipage/forms.html#dom-form-requestsubmit",
      "existsDescription": "typeof form.requestSubmit === \"function\".",
      "nodeGlobal": null,
      "workaround": null,
      "interfaces": [],
      "checks": [
        {
          "id": "submit-event-submitter",
          "description": "requestSubmit(button) fires a cancelable \"submit\" event whose submitter is that button.",
          "spec": "https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#form-submission-algorithm"
        },
        {
          "id": "validation-blocks",
          "description": "With an empty required field, requestSubmit() fires \"invalid\" on it and no \"submit\" event.",
          "spec": "https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#interactively-validate-the-constraints"
        },
        {
          "id": "non-submit-button-throws",
          "description": "requestSubmit(el) with an element that is not a submit button throws a TypeError.",
          "spec": "https://html.spec.whatwg.org/multipage/forms.html#dom-form-requestsubmit"
        }
      ]
    },
    {
      "id": "resize-observer",
      "title": "ResizeObserver",
      "summary": "Reports changes to the size of observed elements.",
      "spec": "https://drafts.csswg.org/resize-observer/#resize-observer-interface",
      "existsDescription": null,
      "nodeGlobal": null,
      "workaround": "Tests usually replace it with a stub class or the \"resize-observer-polyfill\" package.",
      "interfaces": [
        "ResizeObserver"
      ],
      "checks": [
        {
          "id": "observe",
          "description": "new ResizeObserver(cb).observe(el) and disconnect() do not throw. Resize Observer §2.1: the constructor, observe(target, options) and disconnect() steps have no step that throws.",
          "spec": "https://drafts.csswg.org/resize-observer/#dom-resizeobserver-observe"
        },
        {
          "id": "initial-notification",
          "description": "Observing a connected element delivers an initial entry for it, whatever its size. Resize Observer §3.1: new ResizeObservation sets lastReportedSizes to [(-1,-1)], and isActive() is true when the current size differs from it, which any size (0×0 included) does; §3.4.1 gathers active observations and §3.4.5 invokes the callback with their entries. HTML runs these in the event loop's \"update the rendering\" steps (\"gather active resize observations\", \"broadcast active resize observations\"). The intro sums it up: \"Observation will fire when observation starts.\"",
          "spec": "https://drafts.csswg.org/resize-observer/#resize-observation-interface"
        }
      ]
    },
    {
      "id": "scroll-into-view",
      "title": "element.scrollIntoView()",
      "summary": "Scrolls the element's ancestors so the element becomes visible.",
      "spec": "https://drafts.csswg.org/cssom-view/#dom-element-scrollintoview",
      "existsDescription": "typeof element.scrollIntoView === \"function\".",
      "nodeGlobal": null,
      "workaround": "Tests commonly assign a no-op in a setup file: Element.prototype.scrollIntoView = function () {}.",
      "interfaces": [],
      "checks": [
        {
          "id": "callable",
          "description": "scrollIntoView(), scrollIntoView(false) and scrollIntoView({ block: \"center\", behavior: \"smooth\" }) return without error.",
          "spec": "https://drafts.csswg.org/cssom-view/#dom-element-scrollintoview"
        }
      ]
    },
    {
      "id": "shadow-dom",
      "title": "attachShadow() and <slot>",
      "summary": "Shadow trees and slot-based distribution of light-DOM children.",
      "spec": "https://dom.spec.whatwg.org/#dom-element-attachshadow",
      "existsDescription": "typeof element.attachShadow === \"function\".",
      "nodeGlobal": null,
      "workaround": null,
      "interfaces": [
        "ShadowRoot",
        "HTMLSlotElement"
      ],
      "checks": [
        {
          "id": "attach-open",
          "description": "attachShadow({ mode: \"open\" }) returns a shadow root whose host is the element, and element.shadowRoot returns it.",
          "spec": "https://dom.spec.whatwg.org/#dom-element-attachshadow"
        },
        {
          "id": "mode-closed",
          "description": "The root's mode reflects the option: \"open\" for an open root; for mode \"closed\", element.shadowRoot is null.",
          "spec": "https://dom.spec.whatwg.org/#dom-element-shadowroot"
        },
        {
          "id": "slot-assignment",
          "description": "Named and default slots: assignedNodes() returns the matching light-DOM children and assignedSlot points back.",
          "spec": "https://dom.spec.whatwg.org/#find-slotables"
        },
        {
          "id": "encapsulation-and-retarget",
          "description": "document.querySelector does not see into the shadow tree, and an event from inside is retargeted to the host.",
          "spec": "https://dom.spec.whatwg.org/#retarget"
        },
        {
          "id": "slotchange",
          "description": "Adding a child that gets assigned to a slot fires \"slotchange\" on the slot.",
          "spec": "https://dom.spec.whatwg.org/#signal-a-slot-change"
        }
      ]
    },
    {
      "id": "structured-clone",
      "title": "structuredClone()",
      "summary": "Deep-copies a value with the structured clone algorithm (Maps, Dates, cycles, typed arrays).",
      "spec": "https://html.spec.whatwg.org/multipage/structured-data.html#dom-structuredclone",
      "existsDescription": "typeof window.structuredClone is defined.",
      "nodeGlobal": "structuredClone",
      "workaround": "Node.js has structuredClone as a global since 17. Under Jest's jsdom environment it is not copied in; assigning the Node global in a setup file (globalThis.structuredClone ??= ...) is common, or the core-js polyfill.",
      "interfaces": [],
      "checks": [
        {
          "id": "map-date-cycle",
          "description": "Clones a Map, a Date and a circular reference into new objects with the same contents.",
          "spec": "https://html.spec.whatwg.org/multipage/structured-data.html#dom-structuredclone"
        },
        {
          "id": "function-throws",
          "description": "Cloning a function throws a \"DataCloneError\" DOMException.",
          "spec": "https://html.spec.whatwg.org/multipage/structured-data.html#structuredserializeinternal"
        }
      ]
    },
    {
      "id": "text-encoder",
      "title": "TextEncoder / TextDecoder",
      "summary": "Encodes strings to UTF-8 bytes and decodes bytes back to strings.",
      "spec": "https://encoding.spec.whatwg.org/#interface-textencoder",
      "existsDescription": "typeof window.TextEncoder is defined.",
      "nodeGlobal": "TextEncoder",
      "workaround": "Node.js has TextEncoder and TextDecoder as globals (also in the \"util\" module); a setup file can assign them to the test global.",
      "interfaces": [
        "TextEncoder",
        "TextDecoder"
      ],
      "checks": [
        {
          "id": "encode-utf8",
          "description": "new TextEncoder().encode(\"é\") returns the UTF-8 bytes [195, 169].",
          "spec": "https://encoding.spec.whatwg.org/#dom-textencoder-encode"
        },
        {
          "id": "decode-utf8",
          "description": "new TextDecoder().decode() turns [195, 169] back into \"é\".",
          "spec": "https://encoding.spec.whatwg.org/#dom-textdecoder-decode"
        }
      ]
    },
    {
      "id": "web-animations",
      "title": "element.animate() / getAnimations()",
      "summary": "The Web Animations API: run keyframe animations from script and list running animations.",
      "spec": "https://drafts.csswg.org/web-animations-1/#dom-animatable-animate",
      "existsDescription": "typeof element.animate === \"function\".",
      "nodeGlobal": null,
      "workaround": null,
      "interfaces": [
        "Animation",
        "KeyframeEffect"
      ],
      "checks": [
        {
          "id": "animate-returns-animation",
          "description": "animate(keyframes, 1000) returns an Animation whose playState is \"running\" and whose finished is a promise.",
          "spec": "https://drafts.csswg.org/web-animations-1/#dom-animatable-animate"
        },
        {
          "id": "get-animations",
          "description": "element.getAnimations() includes the animation just started.",
          "spec": "https://drafts.csswg.org/web-animations-1/#dom-animatable-getanimations"
        }
      ]
    },
    {
      "id": "window-scroll-to",
      "title": "window.scrollTo()",
      "summary": "Scrolls the viewport to a position.",
      "spec": "https://drafts.csswg.org/cssom-view/#dom-window-scrollto",
      "existsDescription": null,
      "nodeGlobal": null,
      "workaround": "Tests commonly assign a no-op or a mock: window.scrollTo = () => {} (or vi.fn() / jest.fn()).",
      "interfaces": [],
      "checks": [
        {
          "id": "callable",
          "description": "scrollTo(0, 0) and scrollTo({ top: 0, behavior: \"instant\" }) return without error. CSSOM View §4 (Extensions to the Window Interface): scrollTo() \"must act as if the scroll() method was invoked with the same arguments\", which takes (x, y) or a ScrollToOptions dictionary; \"instant\" is a ScrollBehavior value (§3.2).",
          "spec": "https://drafts.csswg.org/cssom-view/#dom-window-scrollto"
        },
        {
          "id": "scroll-position",
          "description": "With nothing to scroll (an empty document), scrollX and scrollY are 0 after scrollTo(0, 50). CSSOM View §4, scroll() method steps: \"If the viewport has downward overflow direction, let y be max(0, min(y, viewport scrolling area height - viewport height))\". The viewport scrolling area (§2) of an empty document is the initial containing block, as tall as the viewport, so y becomes 0, and the next steps end the call because the position equals the current one. scrollY \"must return the y-coordinate … of the top of the viewport, or zero if there is no viewport\", so 0 either way.",
          "spec": "https://drafts.csswg.org/cssom-view/#dom-window-scroll"
        }
      ]
    }
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        "failed": [
          {
            "id": "inherited",
            "error": "child color: expected \"rgb(255, 0, 0)\", got \"red\""
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        "passed": [],
        "failed": [],
        "error": null
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    },
    "crypto": {
      "warpdom@0.1.6": {
        "status": "supported",
        "exists": true,
        "passed": [
          "get-random-values",
          "random-uuid"
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        "failed": [],
        "error": null
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      "happy-dom@21.0.3": {
        "status": "supported",
        "exists": true,
        "sameAsNode": true,
        "passed": [
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        "failed": [],
        "error": null
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        "passed": [
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        "failed": [],
        "error": null
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        "failed": [],
        "error": null
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      "warpdom@0.1.6": {
        "status": "partial",
        "exists": true,
        "passed": [
          "inline-roundtrip",
          "computed-inherited"
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        "failed": [
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            "id": "var-substitution",
            "error": "computed color: expected \"rgb(255, 0, 0)\", got \"var(--c)\""
          }
        ],
        "error": null
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      "happy-dom@21.0.3": {
        "status": "partial",
        "exists": true,
        "passed": [
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          {
            "id": "computed-inherited",
            "error": "computed --gap: expected \"10px\", got \"\""
          },
          {
            "id": "var-substitution",
            "error": "computed color: expected \"rgb(255, 0, 0)\", got \"red\""
          }
        ],
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      "jsdom@30.1.3": {
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      "linkedom@0.18.13": {
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          {
            "id": "computed-inherited",
            "error": "TypeError: w.getComputedStyle is not a function"
          },
          {
            "id": "var-substitution",
            "error": "TypeError: w.getComputedStyle is not a function"
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        ],
        "error": null
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    },
    "css-has": {
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        "failed": [],
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      "happy-dom@21.0.3": {
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        "failed": [],
        "error": null
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      "jsdom@30.1.3": {
        "status": "supported",
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        "passed": [
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          "upgrade"
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        "failed": [],
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        "passed": [
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        "failed": [],
        "error": null
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    },
    "dialog": {
      "warpdom@0.1.6": {
        "status": "missing",
        "exists": false,
        "passed": [],
        "failed": [],
        "error": null
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      "happy-dom@21.0.3": {
        "status": "partial",
        "exists": true,
        "passed": [
          "show-modal-opens",
          "close-return-value"
        ],
        "failed": [
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            "id": "disconnected-throws",
            "error": "showModal() on a disconnected dialog: expected InvalidStateError, nothing was thrown"
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        "error": null
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        "error": null
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      "happy-dom@21.0.3": {
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        "passed": [
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        "failed": [
          {
            "id": "controls",
            "error": "entries: expected \"a=1&b=on1&s=p&s=r\", got \"a=1&b=on1&s=p\""
          }
        ],
        "error": null
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      "jsdom@30.1.3": {
        "status": "supported",
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        "passed": [
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        "failed": [],
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      "linkedom@0.18.13": {
        "status": "stub",
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        "failed": [
          {
            "id": "controls",
            "error": "TypeError: FormData constructor: Argument 1 could not be converted to: undefined."
          },
          {
            "id": "submitter",
            "error": "TypeError: FormData constructor: Argument 1 could not be converted to: undefined."
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        ],
        "error": null
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    "inner-text": {
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        "failed": [],
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        "failed": [
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            "error": "innerText: expected \"a\\nb\", got \"ab\""
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        "status": "missing",
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            "id": "display-none-skipped",
            "error": "innerText: expected \"a\", got \"ab\""
          },
          {
            "id": "setter-br",
            "error": "TypeError: Cannot set property innerText of [object Object] which has only a getter"
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        "error": null
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            "id": "take-records",
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        "failed": [
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        "failed": [
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        "failed": [],
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    },
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        "passed": [
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        "failed": [],
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      "happy-dom@21.0.3": {
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        "failed": [
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            "error": "root.mode: expected \"open\", got undefined"
          },
          {
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          },
          {
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          {
            "id": "slotchange",
            "error": "\"slotchange\" did not fire (waited 500 ms)"
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        ],
        "error": null
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    },
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