{
 "agents": {
  "Android Browser": "android",
  "Baidu Browser": "baidu",
  "Blackberry Browser": "bb",
  "Chrome": "chrome",
  "Chrome for Android": "and_chr",
  "Edge": "edge",
  "Firefox": "firefox",
  "Firefox for Android": "and_ff",
  "IE": "ie",
  "IE Mobile": "ie_mob",
  "KaiOS Browser": "kaios",
  "Opera": "opera",
  "Opera Mini": "op_mini",
  "Opera Mobile": "op_mob",
  "QQ Browser": "and_qq",
  "Safari": "safari",
  "Samsung Internet": "samsung",
  "UC Browser for Android": "and_uc",
  "iOS Safari": "ios_saf"
 },
 "features": {
  "aac": "http://www.digitalpreservation.gov/formats/fdd/fdd000114.shtml",
  "abortcontroller": "https://dom.spec.whatwg.org/#abortsignal",
  "accelerometer": "https://www.w3.org/TR/accelerometer/",
  "addeventlistener": "https://dom.spec.whatwg.org/#dom-eventtarget-addeventlistener",
  "ambient-light": "https://www.w3.org/TR/ambient-light/",
  "apng": "https://wiki.mozilla.org/APNG_Specification",
  "array-find": "https://www.ecma-international.org/ecma-262/6.0/#sec-array.prototype.find",
  "array-flat": "https://tc39.github.io/proposal-flatMap/#sec-Array.prototype.flat",
  "array-includes": "https://tc39.github.io/ecma262/#sec-array.prototype.includes",
  "arrow-functions": "https://www.ecma-international.org/ecma-262/6.0/#sec-arrow-function-definitions",
  "asmjs": "http://asmjs.org/spec/latest/",
  "async-functions": "https://tc39.github.io/ecmascript-asyncawait/",
  "atob-btoa": "https://html.spec.whatwg.org/multipage/webappapis.html#atob",
  "audio": "https://html.spec.whatwg.org/multipage/embedded-content.html#the-audio-element",
  "audio-api": "https://www.w3.org/TR/webaudio/",
  "audiotracks": "https://html.spec.whatwg.org/multipage/embedded-content.html#audiotracklist-and-videotracklist-objects",
  "autofocus": "https://html.spec.whatwg.org/multipage/forms.html#autofocusing-a-form-control:-the-autofocus-attribute",
  "auxclick": "https://w3c.github.io/uievents/#event-type-auxclick",
  "av1": "https://github.com/AOMediaCodec/av1-spec",
  "background-attachment": "https://www.w3.org/TR/css3-background/#the-background-attachment",
  "background-img-opts": "https://www.w3.org/TR/css3-background/#backgrounds",
  "background-position-x-y": "https://drafts.csswg.org/css-backgrounds-4/#background-position-longhands",
  "background-repeat-round-space": "https://www.w3.org/TR/css3-background/#the-background-repeat",
  "background-sync": "https://wicg.github.io/BackgroundSync/spec/",
  "battery-status": "https://www.w3.org/TR/battery-status/",
  "beacon": "https://www.w3.org/TR/beacon/",
  "beforeafterprint": "https://www.w3.org/TR/html5/webappapis.html#printing",
  "bigint": "https://tc39.github.io/proposal-bigint/",
  "blobbuilder": "https://www.w3.org/TR/FileAPI/#constructorBlob",
  "bloburls": "https://www.w3.org/TR/FileAPI/#url",
  "border-image": "https://www.w3.org/TR/css3-background/#border-images",
  "border-radius": "https://www.w3.org/TR/css3-background/#the-border-radius",
  "broadcastchannel": "https://html.spec.whatwg.org/multipage/comms.html#broadcasting-to-other-browsing-contexts",
  "brotli": "https://tools.ietf.org/html/rfc7932",
  "calc": "https://www.w3.org/TR/css3-values/#calc",
  "canvas": "https://html.spec.whatwg.org/multipage/scripting.html#the-canvas-element",
  "canvas-blending": "https://www.w3.org/TR/compositing-1/#blending",
  "canvas-text": "https://html.spec.whatwg.org/multipage/scripting.html#drawing-text-to-the-bitmap",
  "ch-unit": "https://www.w3.org/TR/css3-values/#ch",
  "chacha20-poly1305": "https://tools.ietf.org/html/rfc7905",
  "channel-messaging": "https://html.spec.whatwg.org/multipage/comms.html#channel-messaging",
  "childnode-remove": "https://dom.spec.whatwg.org/#dom-childnode-remove",
  "classlist": "https://dom.spec.whatwg.org/#dom-element-classlist",
  "client-hints-dpr-width-viewport": "https://tools.ietf.org/html/draft-grigorik-http-client-hints",
  "clipboard": "https://www.w3.org/TR/clipboard-apis/",
  "comparedocumentposition": "https://dom.spec.whatwg.org/#dom-node-comparedocumentposition",
  "console-basic": "https://console.spec.whatwg.org/",
  "console-time": "https://console.spec.whatwg.org/#time",
  "const": "https://www.ecma-international.org/ecma-262/6.0/#sec-let-and-const-declarations",
  "constraint-validation": "https://html.spec.whatwg.org/dev/form-control-infrastructure.html#the-constraint-validation-api",
  "contenteditable": "https://html.spec.whatwg.org/multipage/interaction.html#contenteditable",
  "contentsecuritypolicy": "https://www.w3.org/TR/2012/CR-CSP-20121115/",
  "contentsecuritypolicy2": "https://www.w3.org/TR/CSP2/",
  "cors": "https://fetch.spec.whatwg.org/#http-cors-protocol",
  "createimagebitmap": "https://html.spec.whatwg.org/multipage/imagebitmap-and-animations.html#dom-createimagebitmap",
  "credential-management": "https://www.w3.org/TR/credential-management-1/",
  "cryptography": "https://www.w3.org/TR/WebCryptoAPI/",
  "css-all": "https://www.w3.org/TR/css-cascade-3/#all-shorthand",
  "css-animation": "https://www.w3.org/TR/css3-animations/",
  "css-appearance": "https://drafts.csswg.org/css-ui-4/#appearance-switching",
  "css-apply-rule": "https://tabatkins.github.io/specs/css-apply-rule/",
  "css-at-counter-style": "https://drafts.csswg.org/css-counter-styles/",
  "css-backdrop-filter": "https://drafts.fxtf.org/filter-effects-2/#BackdropFilterProperty",
  "css-background-offsets": "https://www.w3.org/TR/css3-background/#background-position",
  "css-backgroundblendmode": "https://www.w3.org/TR/compositing-1/#propdef-background-blend-mode",
  "css-boxdecorationbreak": "https://www.w3.org/TR/css3-break/#break-decoration",
  "css-boxshadow": "https://www.w3.org/TR/css3-background/#box-shadow",
  "css-canvas": "http://webkit.org/blog/176/css-canvas-drawing/",
  "css-caret-color": "https://www.w3.org/TR/css-ui-3/#caret-color",
  "css-case-insensitive": "https://www.w3.org/TR/selectors-4/#attribute-case",
  "css-clip-path": "https://www.w3.org/TR/css-masking-1/#the-clip-path",
  "css-color-adjust": "https://drafts.csswg.org/css-color-4/#color-adjust",
  "css-conic-gradients": "https://www.w3.org/TR/css-images-4/#conic-gradients",
  "css-containment": "https://www.w3.org/TR/css-contain-1/#contain-property",
  "css-counters": "https://www.w3.org/TR/CSS21/generate.html#counters",
  "css-crisp-edges": "https://drafts.csswg.org/css-images-3/#valdef-image-rendering-crisp-edges",
  "css-cross-fade": "https://drafts.csswg.org/css-images-3/#cross-fade-function",
  "css-default-pseudo": "https://drafts.csswg.org/selectors-4/#the-default-pseudo",
  "css-descendant-gtgt": "https://drafts.csswg.org/selectors-4/#descendant-combinators",
  "css-deviceadaptation": "https://www.w3.org/TR/css-device-adapt/",
  "css-dir-pseudo": "https://www.w3.org/TR/selectors4/#the-dir-pseudo",
  "css-display-contents": "https://drafts.csswg.org/css-display/",
  "css-element-function": "https://www.w3.org/TR/css4-images/#element-notation",
  "css-env-function": "https://drafts.csswg.org/css-env-1/#env-function",
  "css-exclusions": "https://www.w3.org/TR/css3-exclusions/",
  "css-featurequeries": "https://www.w3.org/TR/css3-conditional/#at-supports",
  "css-filter-function": "https://www.w3.org/TR/filter-effects/#FilterCSSImageValue",
  "css-filters": "https://www.w3.org/TR/filter-effects-1/",
  "css-first-letter": "https://www.w3.org/TR/css3-selectors/#first-letter",
  "css-first-line": "https://drafts.csswg.org/selectors-3/#first-line",
  "css-fixed": "https://www.w3.org/TR/CSS21/visuren.html#fixed-positioning",
  "css-focus-visible": "https://drafts.csswg.org/selectors-4/#the-focus-visible-pseudo",
  "css-focus-within": "https://drafts.csswg.org/selectors-4/#the-focus-within-pseudo",
  "css-font-rendering-controls": "https://www.w3.org/TR/css-fonts-4/#font-display-desc",
  "css-font-stretch": "https://www.w3.org/TR/css-fonts-3/#font-stretch-prop",
  "css-gencontent": "https://www.w3.org/TR/CSS21/generate.html",
  "css-gradients": "https://www.w3.org/TR/css3-images/",
  "css-grid": "https://www.w3.org/TR/css-grid-1/",
  "css-hanging-punctuation": "https://drafts.csswg.org/css-text-3/#hanging-punctuation-property",
  "css-has": "https://drafts.csswg.org/selectors-4/#relational",
  "css-hyphens": "https://www.w3.org/TR/css3-text/#hyphenation",
  "css-image-orientation": "https://www.w3.org/TR/css3-images/#image-orientation",
  "css-image-set": "https://drafts.csswg.org/css-images-4/#image-set-notation",
  "css-in-out-of-range": "https://www.w3.org/TR/selectors4/#range-pseudos",
  "css-indeterminate-pseudo": "https://drafts.csswg.org/selectors-4/#indeterminate",
  "css-initial-letter": "https://www.w3.org/TR/css-inline/#initial-letter-styling",
  "css-initial-value": "https://www.w3.org/TR/css-values/#common-keywords",
  "css-letter-spacing": "https://www.w3.org/TR/CSS2/text.html#propdef-letter-spacing",
  "css-line-clamp": "https://developer.apple.com/library/safari/documentation/AppleApplications/Reference/SafariCSSRef/Articles/StandardCSSProperties.html#//apple_ref/doc/uid/TP30001266-WebKit_SpecificUnsupportedProperties",
  "css-logical-props": "https://www.w3.org/TR/css-logical-1/",
  "css-marker-pseudo": "https://drafts.csswg.org/css-lists-3/#marker-pseudo-element",
  "css-masks": "https://www.w3.org/TR/css-masking-1/",
  "css-matches-pseudo": "https://www.w3.org/TR/selectors4/#matches",
  "css-math-functions": "https://www.w3.org/TR/css-values-4/#math-function",
  "css-media-interaction": "https://www.w3.org/TR/mediaqueries-4/#mf-interaction",
  "css-media-resolution": "https://www.w3.org/TR/css3-mediaqueries/#resolution",
  "css-mediaqueries": "https://www.w3.org/TR/css3-mediaqueries/",
  "css-mixblendmode": "https://www.w3.org/TR/compositing-1/#mix-blend-mode",
  "css-motion-paths": "https://www.w3.org/TR/motion-1/",
  "css-namespaces": "https://drafts.csswg.org/css-namespaces/",
  "css-not-sel-list": "https://www.w3.org/TR/selectors4/#negation",
  "css-nth-child-of": "https://drafts.csswg.org/selectors/#the-nth-child-pseudo",
  "css-opacity": "https://www.w3.org/TR/css3-color/",
  "css-optional-pseudo": "https://drafts.csswg.org/selectors-4/#optional-pseudo",
  "css-overflow": "https://www.w3.org/TR/css-overflow-3/",
  "css-overflow-anchor": "https://wicg.github.io/ScrollAnchoring/",
  "css-overscroll-behavior": "https://drafts.csswg.org/css-overscroll-behavior-1/",
  "css-page-break": "https://www.w3.org/TR/CSS2/page.html#page-breaks",
  "css-paged-media": "https://drafts.csswg.org/css-page-3/",
  "css-paint-api": "https://drafts.css-houdini.org/css-paint-api/",
  "css-placeholder": "https://drafts.csswg.org/css-pseudo-4/#placeholder-pseudo",
  "css-placeholder-shown": "https://www.w3.org/TR/selectors4/#placeholder",
  "css-read-only-write": "https://html.spec.whatwg.org/multipage/scripting.html#selector-read-only",
  "css-rebeccapurple": "https://www.w3.org/TR/css-color-4/#valdef-color-rebeccapurple",
  "css-reflections": "http://webkit.org/blog/182/css-reflections/",
  "css-regions": "https://www.w3.org/TR/css3-regions/",
  "css-repeating-gradients": "https://www.w3.org/TR/css3-images/#repeating-gradients",
  "css-resize": "https://www.w3.org/TR/css3-ui/#resize",
  "css-revert-value": "https://www.w3.org/TR/css-cascade-4/#valdef-all-revert",
  "css-rrggbbaa": "https://drafts.csswg.org/css-color/#hex-notation",
  "css-scroll-behavior": "https://drafts.csswg.org/cssom-view/#propdef-scroll-behavior",
  "css-scrollbar": "https://drafts.csswg.org/css-scrollbars-1/",
  "css-sel2": "https://www.w3.org/TR/CSS21/selector.html",
  "css-sel3": "https://www.w3.org/TR/css3-selectors/",
  "css-selection": "https://www.w3.org/TR/css-pseudo-4/#selectordef-selection",
  "css-shapes": "https://www.w3.org/TR/css-shapes/",
  "css-snappoints": "https://www.w3.org/TR/css-scroll-snap-1/",
  "css-sticky": "https://drafts.csswg.org/css-position/#sticky-pos",
  "css-subgrid": "https://www.w3.org/TR/css-grid-2/#subgrids",
  "css-supports-api": "https://drafts.csswg.org/css-conditional/#the-css-interface",
  "css-table": "https://www.w3.org/TR/CSS21/tables.html",
  "css-text-align-last": "https://www.w3.org/TR/css3-text/#text-align-last-property",
  "css-text-indent": "https://drafts.csswg.org/css-text-3/#text-indent-property",
  "css-text-justify": "https://drafts.csswg.org/css-text-3/#text-justify-property",
  "css-text-orientation": "https://drafts.csswg.org/css-writing-modes-3/#text-orientation",
  "css-textshadow": "https://www.w3.org/TR/css-text-decor-3/#text-shadow-property",
  "css-touch-action": "https://www.w3.org/TR/pointerevents/#the-touch-action-css-property",
  "css-transitions": "https://www.w3.org/TR/css3-transitions/",
  "css-unset-value": "https://www.w3.org/TR/css-cascade-3/#inherit-initial",
  "css-variables": "https://www.w3.org/TR/css-variables/",
  "css-widows-orphans": "https://drafts.csswg.org/css-break-3/#widows-orphans",
  "css-writing-mode": "https://drafts.csswg.org/css-writing-modes-3/#block-flow",
  "css-zoom": "https://msdn.microsoft.com/en-us/library/ms531189(v=vs.85).aspx",
  "css3-attr": "https://www.w3.org/TR/css-values/#attr-notation",
  "css3-boxsizing": "https://www.w3.org/TR/css-sizing/#box-sizing",
  "css3-colors": "https://www.w3.org/TR/css3-color/",
  "css3-cursors": "https://www.w3.org/TR/css3-ui/#cursor",
  "css3-cursors-grab": "https://www.w3.org/TR/css3-ui/#cursor",
  "css3-cursors-newer": "https://www.w3.org/TR/css3-ui/#cursor",
  "css3-tabsize": "https://www.w3.org/TR/css3-text/#tab-size",
  "currentcolor": "https://www.w3.org/TR/css3-color/#currentcolor",
  "custom-elements": "https://www.w3.org/TR/custom-elements/",
  "custom-elementsv1": "https://html.spec.whatwg.org/multipage/scripting.html#custom-elements",
  "customevent": "https://dom.spec.whatwg.org/#interface-customevent",
  "datalist": "https://html.spec.whatwg.org/multipage/forms.html#the-datalist-element",
  "dataset": "https://html.spec.whatwg.org/multipage/dom.html#embedding-custom-non-visible-data-with-the-data-*-attributes",
  "datauri": "https://tools.ietf.org/html/rfc2397",
  "date-tolocaledatestring": "https://tc39.github.io/ecma402/#sec-Date.prototype.toLocaleDateString",
  "details": "https://html.spec.whatwg.org/multipage/forms.html#the-details-element",
  "deviceorientation": "https://www.w3.org/TR/orientation-event/",
  "devicepixelratio": "https://drafts.csswg.org/cssom-view/#dom-window-devicepixelratio",
  "dialog": "https://html.spec.whatwg.org/multipage/forms.html#the-dialog-element",
  "dispatchevent": "https://dom.spec.whatwg.org/#dom-eventtarget-dispatchevent",
  "do-not-track": "https://www.w3.org/TR/tracking-dnt/",
  "document-currentscript": "https://html.spec.whatwg.org/multipage/dom.html#dom-document-currentscript",
  "document-evaluate-xpath": "https://www.w3.org/TR/DOM-Level-3-XPath/xpath.html#XPathEvaluator-evaluate",
  "document-execcommand": "https://w3c.github.io/editing/execCommand.html#execcommand()",
  "document-scrollingelement": "https://drafts.csswg.org/cssom-view/#dom-document-scrollingelement",
  "documenthead": "https://html.spec.whatwg.org/multipage/#dom-document-head",
  "dom-manip-convenience": "https://dom.spec.whatwg.org/#interface-childnode",
  "dom-range": "https://dom.spec.whatwg.org/#ranges",
  "domcontentloaded": "https://html.spec.whatwg.org/multipage/syntax.html#stop-parsing",
  "dommatrix": "https://drafts.fxtf.org/geometry/#dommatrix",
  "download": "https://html.spec.whatwg.org/multipage/semantics.html#downloading-resources",
  "dragndrop": "https://html.spec.whatwg.org/multipage/interaction.html#dnd",
  "element-closest": "https://dom.spec.whatwg.org/#dom-element-closest",
  "element-from-point": "https://www.w3.org/TR/cssom-view-1/#dom-document-elementfrompoint",
  "element-scroll-methods": "https://www.w3.org/TR/cssom-view-1/#extension-to-the-element-interface",
  "eme": "https://w3c.github.io/encrypted-media/",
  "eot": "https://www.w3.org/Submission/EOT/",
  "es5": "https://www.ecma-international.org/ecma-262/5.1/",
  "es6": "https://www.ecma-international.org/ecma-262/6.0/",
  "es6-class": "https://www.ecma-international.org/ecma-262/6.0/#sec-class-definitions",
  "es6-generators": "http://www.ecma-international.org/ecma-262/6.0/#",
  "es6-module": "https://html.spec.whatwg.org/multipage/scripting.html#attr-script-type",
  "es6-module-dynamic-import": "https://github.com/tc39/proposal-dynamic-import",
  "es6-number": "https://www.ecma-international.org/ecma-262/6.0/#sec-number-objects",
  "es6-string-includes": "http://www.ecma-international.org/ecma-262/6.0/#sec-string.prototype.includes",
  "eventsource": "https://html.spec.whatwg.org/multipage/comms.html#server-sent-events",
  "feature-policy": "https://w3c.github.io/webappsec-feature-policy/",
  "fetch": "https://fetch.spec.whatwg.org/",
  "fieldset-disabled": "https://html.spec.whatwg.org/multipage/forms.html#attr-fieldset-disabled",
  "fileapi": "https://www.w3.org/TR/FileAPI/",
  "filereader": "https://www.w3.org/TR/FileAPI/#dfn-filereader",
  "filereadersync": "https://w3c.github.io/FileAPI/#FileReaderSync",
  "filesystem": "https://www.w3.org/TR/file-system-api/",
  "flac": "https://xiph.org/flac/format.html",
  "flexbox": "https://www.w3.org/TR/css3-flexbox/",
  "flexbox-gap": "https://www.w3.org/TR/css-align-3/#gaps",
  "flow-root": "https://www.w3.org/TR/css-display-3/#valdef-display-flow-root",
  "focusin-focusout-events": "https://www.w3.org/TR/DOM-Level-3-Events/#event-type-focusin",
  "font-family-system-ui": "https://drafts.csswg.org/css-fonts-4/#system-ui-def",
  "font-feature": "http://w3.org/TR/css3-fonts/#font-rend-props",
  "font-kerning": "https://www.w3.org/TR/css3-fonts/#font-kerning-prop",
  "font-loading": "https://www.w3.org/TR/css-font-loading-3/",
  "font-size-adjust": "https://www.w3.org/TR/css-fonts-3/#font-size-adjust-prop",
  "font-smooth": "https://www.w3.org/TR/WD-font/#font-smooth",
  "font-unicode-range": "https://drafts.csswg.org/css-fonts/#unicode-range-desc",
  "font-variant-alternates": "https://www.w3.org/TR/css-fonts-3/#propdef-font-variant-alternates",
  "font-variant-numeric": "https://drafts.csswg.org/css-fonts-3/#propdef-font-variant-numeric",
  "fontface": "https://www.w3.org/TR/css3-webfonts/",
  "form-attribute": "https://html.spec.whatwg.org/multipage/forms.html#attr-fae-form",
  "form-submit-attributes": "https://html.spec.whatwg.org/multipage/forms.html#attributes-for-form-submission",
  "form-validation": "https://html.spec.whatwg.org/multipage/forms.html#client-side-form-validation",
  "forms": "https://html.spec.whatwg.org/multipage/forms.html#forms",
  "fullscreen": "https://fullscreen.spec.whatwg.org/",
  "gamepad": "https://www.w3.org/TR/gamepad/",
  "geolocation": "https://www.w3.org/TR/geolocation-API/",
  "getboundingclientrect": "https://www.w3.org/TR/cssom-view/#dom-element-getboundingclientrect",
  "getcomputedstyle": "https://www.w3.org/TR/cssom/#dom-window-getcomputedstyle",
  "getelementsbyclassname": "https://dom.spec.whatwg.org/#dom-document-getelementsbyclassname",
  "getrandomvalues": "https://www.w3.org/TR/WebCryptoAPI/#RandomSource-method-getRandomValues",
  "gyroscope": "https://www.w3.org/TR/gyroscope/",
  "hardwareconcurrency": "https://html.spec.whatwg.org/multipage/workers.html#navigator.hardwareconcurrency",
  "hashchange": "https://html.spec.whatwg.org/multipage/browsers.html#the-hashchangeevent-interface",
  "heif": "http://nokiatech.github.io/heif/technical.html",
  "hevc": "https://www.itu.int/rec/T-REC-H.265",
  "hidden": "https://html.spec.whatwg.org/multipage/interaction.html#the-hidden-attribute",
  "high-resolution-time": "https://www.w3.org/TR/hr-time/",
  "history": "https://html.spec.whatwg.org/multipage/browsers.html#dom-history-pushstate",
  "html-media-capture": "https://w3c.github.io/html-media-capture/",
  "html5semantic": "https://html.spec.whatwg.org/multipage/semantics.html#sections",
  "http-live-streaming": "https://tools.ietf.org/html/rfc8216",
  "http2": "https://tools.ietf.org/html/rfc7540",
  "http3": "https://tools.ietf.org/html/draft-ietf-quic-http-23",
  "iframe-sandbox": "https://html.spec.whatwg.org/multipage/embedded-content.html#attr-iframe-sandbox",
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  "iframe-srcdoc": "https://html.spec.whatwg.org/multipage/embedded-content.html#attr-iframe-srcdoc",
  "ime": "https://www.w3.org/TR/ime-api/",
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  "imports": "https://www.w3.org/TR/html-imports/",
  "indeterminate-checkbox": "https://html.spec.whatwg.org/#dom-input-indeterminate",
  "indexeddb": "https://www.w3.org/TR/IndexedDB/",
  "indexeddb2": "https://www.w3.org/TR/IndexedDB-2/",
  "inline-block": "https://www.w3.org/TR/CSS21/visuren.html#fixed-positioning",
  "innertext": "https://html.spec.whatwg.org/multipage/dom.html#the-innertext-idl-attribute",
  "input-autocomplete-onoff": "https://html.spec.whatwg.org/multipage/forms.html#autofill",
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  "input-datetime": "https://html.spec.whatwg.org/multipage/forms.html#date-state-(type=date)",
  "input-email-tel-url": "https://html.spec.whatwg.org/multipage/forms.html#telephone-state-(type=tel)",
  "input-event": "https://html.spec.whatwg.org/multipage/forms.html#event-input-input",
  "input-file-accept": "https://html.spec.whatwg.org/multipage/forms.html#attr-input-accept",
  "input-file-directory": "https://wicg.github.io/entries-api/#dom-htmlinputelement-webkitdirectory",
  "input-file-multiple": "https://html.spec.whatwg.org/multipage/forms.html#attr-input-multiple",
  "input-inputmode": "https://html.spec.whatwg.org/multipage/forms.html#input-modalities:-the-inputmode-attribute",
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  "input-number": "https://html.spec.whatwg.org/multipage/forms.html#number-state-(type=number)",
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  "input-placeholder": "https://html.spec.whatwg.org/multipage/forms.html#attr-input-placeholder",
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  "input-selection": "https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#dom-textarea/input-setselectionrange",
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  "internationalization": "https://www.ecma-international.org/ecma-402/1.0/",
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  "kerning-pairs-ligatures": "https://www.w3.org/TR/SVG2/painting.html#TextRendering",
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  "keyboardevent-code": "https://www.w3.org/TR/uievents/#widl-KeyboardEvent-code",
  "keyboardevent-getmodifierstate": "https://www.w3.org/TR/uievents/#widl-KeyboardEvent-getModifierState",
  "keyboardevent-key": "https://www.w3.org/TR/uievents/#dom-keyboardevent-key",
  "keyboardevent-location": "https://www.w3.org/TR/uievents/#widl-KeyboardEvent-location",
  "keyboardevent-which": "https://w3c.github.io/uievents/#widl-KeyboardEvent-which",
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  "link-icon-svg": "https://html.spec.whatwg.org/multipage/semantics.html#rel-icon",
  "link-rel-dns-prefetch": "https://www.w3.org/TR/resource-hints/#dns-prefetch",
  "link-rel-modulepreload": "https://html.spec.whatwg.org/multipage/links.html#link-type-modulepreload",
  "link-rel-preconnect": "https://www.w3.org/TR/resource-hints/#preconnect",
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  "link-rel-preload": "https://w3c.github.io/preload/",
  "link-rel-prerender": "https://www.w3.org/TR/resource-hints/#prerender",
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  "localecompare": "https://www.ecma-international.org/ecma-402/2.0/#sec-13.1.1",
  "magnetometer": "https://www.w3.org/TR/magnetometer/",
  "matchesselector": "https://dom.spec.whatwg.org/#dom-element-matches",
  "matchmedia": "https://www.w3.org/TR/cssom-view/#dom-window-matchmedia",
  "mathml": "https://www.w3.org/TR/MathML/",
  "maxlength": "https://html.spec.whatwg.org/multipage/forms.html#attr-input-maxlength",
  "media-fragments": "https://www.w3.org/TR/media-frags/",
  "mediacapture-fromelement": "https://w3c.github.io/mediacapture-fromelement/",
  "mediarecorder": "https://w3c.github.io/mediacapture-record/MediaRecorder.html",
  "mediasource": "https://www.w3.org/TR/media-source/",
  "menu": "https://www.w3.org/TR/2016/REC-html51-20161101/interactive-elements.html#context-menus",
  "meta-theme-color": "https://html.spec.whatwg.org/multipage/semantics.html#meta-theme-color",
  "meter": "https://html.spec.whatwg.org/multipage/forms.html#the-meter-element",
  "midi": "http://webaudio.github.io/web-midi-api/",
  "minmaxwh": "https://www.w3.org/TR/CSS21/visudet.html#min-max-widths",
  "mp3": "http://mpgedit.org/mpgedit/mpeg_format/MP3Format.html",
  "mpeg-dash": "https://www.iso.org/standard/65274.html",
  "mpeg4": "http://ip.hhi.de/imagecom_G1/assets/pdfs/csvt_overview_0305.pdf",
  "multibackgrounds": "https://www.w3.org/TR/css3-background/",
  "multicolumn": "https://www.w3.org/TR/css3-multicol/",
  "mutation-events": "https://www.w3.org/TR/DOM-Level-3-Events/#legacy-mutationevent-events",
  "mutationobserver": "https://dom.spec.whatwg.org/#mutation-observers",
  "namevalue-storage": "https://html.spec.whatwg.org/multipage/webstorage.html#storage",
  "native-filesystem-api": "https://wicg.github.io/native-file-system/",
  "nav-timing": "https://www.w3.org/TR/navigation-timing/",
  "netinfo": "http://wicg.github.io/netinfo/",
  "notifications": "https://notifications.spec.whatwg.org/",
  "object-entries": "https://www.ecma-international.org/ecma-262/8.0/#sec-object.entries",
  "object-fit": "https://www.w3.org/TR/css3-images/",
  "object-observe": "http://wiki.ecmascript.org/doku.php?id=harmony:observe",
  "object-values": "https://www.ecma-international.org/ecma-262/8.0/#sec-object.values",
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  "offline-apps": "https://html.spec.whatwg.org/multipage/browsers.html#offline",
  "offscreencanvas": "https://html.spec.whatwg.org/multipage/canvas.html#the-offscreencanvas-interface",
  "ogg-vorbis": "http://www.xiph.org/vorbis/doc/Vorbis_I_spec.html",
  "ogv": "http://theora.org/doc/",
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  "once-event-listener": "https://dom.spec.whatwg.org/#dom-addeventlisteneroptions-once",
  "online-status": "https://html.spec.whatwg.org/multipage/browsers.html#browser-state",
  "opus": "https://tools.ietf.org/html/rfc6716",
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  "outline": "https://drafts.csswg.org/css-ui/",
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  "page-transition-events": "https://html.spec.whatwg.org/multipage/indices.html#event-pageshow",
  "pagevisibility": "https://www.w3.org/TR/page-visibility/",
  "passive-event-listener": "https://dom.spec.whatwg.org/#dom-addeventlisteneroptions-passive",
  "path2d": "https://html.spec.whatwg.org/multipage/canvas.html#path2d-objects",
  "payment-request": "https://www.w3.org/TR/payment-request/",
  "permissions-api": "https://w3c.github.io/permissions/",
  "picture": "https://html.spec.whatwg.org/multipage/embedded-content.html#the-picture-element",
  "picture-in-picture": "https://wicg.github.io/picture-in-picture/",
  "ping": "https://html.spec.whatwg.org/multipage/semantics.html#ping",
  "png-alpha": "https://www.w3.org/TR/PNG/",
  "pointer": "https://www.w3.org/TR/pointerevents/",
  "pointer-events": "http://wiki.csswg.org/spec/css4-ui#pointer-events",
  "pointerlock": "https://www.w3.org/TR/pointerlock/",
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  "prefers-reduced-motion": "https://drafts.csswg.org/mediaqueries-5/#prefers-reduced-motion",
  "progress": "https://html.spec.whatwg.org/multipage/forms.html#the-progress-element",
  "promise-finally": "https://tc39.github.io/ecma262/#sec-promise.prototype.finally",
  "promises": "https://www.ecma-international.org/ecma-262/6.0/#sec-promise-objects",
  "proximity": "https://www.w3.org/TR/proximity/",
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  "publickeypinning": "https://tools.ietf.org/html/rfc7469",
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  "queryselector": "https://dom.spec.whatwg.org/#dom-parentnode-queryselector",
  "readonly-attr": "https://html.spec.whatwg.org/multipage/input.html#the-readonly-attribute",
  "referrer-policy": "http://w3c.github.io/webappsec/specs/referrer-policy/",
  "registerprotocolhandler": "https://html.spec.whatwg.org/multipage/webappapis.html#custom-handlers",
  "rel-noopener": "https://html.spec.whatwg.org/multipage/semantics.html#link-type-noopener",
  "rel-noreferrer": "https://html.spec.whatwg.org/multipage/semantics.html#link-type-noreferrer",
  "rellist": "https://html.spec.whatwg.org/multipage/semantics.html#dom-a-rellist",
  "rem": "https://www.w3.org/TR/css3-values/#font-relative-lengths",
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  "requestidlecallback": "https://w3c.github.io/requestidlecallback/",
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  "rtcpeerconnection": "https://w3c.github.io/webrtc-pc/",
  "ruby": "https://html.spec.whatwg.org/multipage/semantics.html#the-ruby-element",
  "run-in": "https://drafts.csswg.org/css-display/#valdef-display-run-in",
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  "sql-storage": "https://www.w3.org/TR/webdatabase/",
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  "stream": "https://www.w3.org/TR/mediacapture-streams/",
  "streams": "https://streams.spec.whatwg.org/",
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  "style-scoped": "https://www.w3.org/TR/html51/document-metadata.html#element-attrdef-style-scoped",
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  "svg-img": "https://html.spec.whatwg.org/multipage/embedded-content.html",
  "svg-smil": "https://www.w3.org/TR/SVG11/animate.html",
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  "tabindex-attr": "https://html.spec.whatwg.org/multipage/interaction.html#attr-tabindex",
  "template": "https://html.spec.whatwg.org/multipage/scripting.html#the-template-element",
  "template-literals": "https://www.ecma-international.org/ecma-262/6.0/#sec-template-literals",
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  "textcontent": "https://dom.spec.whatwg.org/#dom-node-textcontent",
  "textencoder": "https://encoding.spec.whatwg.org/#api",
  "tls1-1": "https://tools.ietf.org/html/rfc4346",
  "tls1-2": "https://tools.ietf.org/html/rfc5246",
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  "touch": "https://www.w3.org/TR/touch-events/",
  "transforms2d": "https://www.w3.org/TR/css3-2d-transforms/",
  "transforms3d": "https://www.w3.org/TR/css3-3d-transforms/",
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  "unhandledrejection": "https://html.spec.whatwg.org/multipage/webappapis.html#unhandled-promise-rejections:event-unhandledrejection",
  "upgradeinsecurerequests": "https://www.w3.org/TR/upgrade-insecure-requests/",
  "url": "https://url.spec.whatwg.org/#api",
  "urlsearchparams": "https://url.spec.whatwg.org/#urlsearchparams",
  "use-strict": "https://www.ecma-international.org/ecma-262/5.1/#sec-14.1",
  "user-select-none": "https://drafts.csswg.org/css-ui-4/#valdef-user-select-none",
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  "variable-fonts": "https://drafts.csswg.org/css-fonts-4/#font-variation-settings-def",
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  "video": "https://html.spec.whatwg.org/multipage/embedded-content.html#the-video-element",
  "videotracks": "https://html.spec.whatwg.org/multipage/embedded-content.html#audiotracklist-and-videotracklist-objects",
  "viewport-units": "https://www.w3.org/TR/css3-values/#viewport-relative-lengths",
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  "wasm": "https://github.com/WebAssembly/spec",
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  "web-animation": "http://w3c.github.io/web-animations/",
  "web-app-manifest": "https://www.w3.org/TR/appmanifest/",
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  "web-share": "https://wicg.github.io/web-share/",
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  "webm": "https://www.webmproject.org",
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  "websockets": "https://html.spec.whatwg.org/multipage/comms.html#network",
  "webusb": "https://wicg.github.io/webusb/",
  "webvr": "https://w3c.github.io/webvr/",
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  "webxr": "https://www.w3.org/TR/webxr/",
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  "woff": "https://www.w3.org/TR/WOFF/",
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  "word-break": "https://www.w3.org/TR/css3-text/#word-break",
  "wordwrap": "https://www.w3.org/TR/css3-text/#overflow-wrap",
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  "x-frame-options": "https://tools.ietf.org/html/rfc7034",
  "xhr2": "https://xhr.spec.whatwg.org/",
  "xhtml": "https://html.spec.whatwg.org/multipage/xhtml.html#the-xhtml-syntax",
  "xhtmlsmil": "https://www.w3.org/TR/XHTMLplusSMIL/",
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}