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features.json
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{
"specification": [
{
"name": "Application Cache",
"status": {
"status": "Deprecated"
},
"url": "https://html.spec.whatwg.org/multipage/offline.html",
"webkit-url": "https://webkit.org/b/181764",
"keywords": ["appcache", "application cache"],
"category": "webapps",
"description": "Resources are saved for offline use using a manifest."
},
{
"name": "Async Clipboard API",
"status": {
"status": "Supported"
},
"url": "https://www.w3.org/TR/clipboard-apis/#async-clipboard-api",
"category": "webapps",
"description": "An API that allows reading from and writing to the system clipboard.",
"contact": {
"name": "Wenson Hsieh",
"email": "[email protected]",
"twitter": "@wensonhsieh"
}
},
{
"name": "Battery Status API",
"status": {
"status": "Not Considering"
},
"url": "https://w3c.github.io/battery/",
"webkit-url": "https://webkit.org/b/62698",
"keywords": ["battery", "privacy"],
"category": "webapps",
"description": "An API that provides information about the battery status of the hosting device."
},
{
"name": "Beacon API",
"status": {
"status": "Supported"
},
"url": "https://www.w3.org/TR/beacon/",
"webkit-url": "https://webkit.org/b/147885",
"keywords": ["beacon","analytics","diagnostics","request"],
"category": "webapps",
"description": "Schedules asynchronous and non-blocking data delivery while the current page is unloading to mitigate resource contention for other time-critical requests.",
"contact": {
"name": "Chris Dumez",
"email": "[email protected]",
"twitter": "@chris_dumez"
}
},
{
"name": "CSS Animation Worklet API",
"status": {
"status": "Under Consideration"
},
"url": "https://drafts.css-houdini.org/css-animationworklet/",
"keywords": ["css", "houdini", "animation", "worklet"],
"category": "css"
},
{
"name": "CSS Aspect ratio property",
"status": {
"status": "Supported"
},
"url": "https://drafts.csswg.org/css-sizing-4/#aspect-ratio",
"webkit-url": "https://bugs.webkit.org/show_bug.cgi?id=47738",
"keywords": ["css", "css-sizing", "aspect-ratio"],
"category": "css"
},
{
"name": "CSS Color Level 4",
"status": {
"status": "Supported"
},
"url": "https://drafts.csswg.org/css-color/",
"keywords": ["css color", "color"],
"category": "css",
"description": "Allows content to specify colors outside of the sRGB Color Space."
},
{
"name": "CSS Containment Level 1",
"status": {
"status": "In Development",
"enabled-by-default": false
},
"url": "https://www.w3.org/TR/css-contain-1/",
"webkit-url": "https://bugs.webkit.org/show_bug.cgi?id=172026",
"keywords": ["css containment", "contain", "content", "layout", "size", "paint"],
"category": "css",
"description": "Allows content to specify that an element’s subtree is independent of the rest of the page to allow for optimizations by the browser."
},
{
"name": "CSS Custom Highlight API Module Level 1",
"status": {
"status": "In Development",
"enabled-by-default": false
},
"url": "https://drafts.csswg.org/css-highlight-api-1/",
"keywords": ["css pseudo-element", "highlight"],
"category": "css",
"description": "A mechanism for styling arbitrary ranges of a document identified by script."
},
{
"name": "CSS Font Display",
"status": {
"status": "Supported",
"enabled-by-default": false
},
"url": "https://drafts.csswg.org/css-fonts-4/#font-display-desc",
"keywords": ["css font display", "font display", "font-display", "css font rendering controls", "font rendering controls"],
"category": "css",
"description": "Allows content to specify what is shown during font loading.",
"contact": {
"name": "Myles C. Maxfield",
"twitter": "@Litherum",
"email": "[email protected]"
}
},
{
"name": "CSS Fonts Level 4",
"status": {
"status": "Partially Supported"
},
"url": "https://drafts.csswg.org/css-fonts-4/",
"keywords": ["css fonts", "fonts"],
"category": "css",
"contact": {
"name": "Myles C. Maxfield",
"twitter": "@Litherum",
"email": "[email protected]"
}
},
{
"name": "CSS Grid Layout Level 1",
"status": {
"status": "Supported"
},
"url": "http://dev.w3.org/csswg/css-grid/",
"webkit-url": "https://bugs.webkit.org/show_bug.cgi?id=60731",
"keywords": ["css grid layout", "css grid", "grid"],
"category": "css",
"contact": {
"name": "Sergio Villar Senin",
"email": "[email protected]"
}
},
{
"name": "CSS Image Values and Replaced Content Module Level 4",
"url": "https://www.w3.org/TR/css4-images/",
"keywords": ["css image values","css","image values"],
"category": "css"
},
{
"name": "CSS Inline Layout Module Level 3",
"status": {
"status": "Supported"
},
"url": "http://dev.w3.org/csswg/css-inline/",
"keywords": ["css inline layout", "css inline", "inline"],
"category": "css"
},
{
"name": "CSS Layout API Level 1",
"status": {
"status": "Under Consideration"
},
"url": "https://drafts.css-houdini.org/css-layout-api/",
"keywords": ["css", "houdini", "layout", "worklet"],
"category": "css"
},
{
"name": "CSS Logical Properties and Values Level 1",
"status": {
"status": "In Development"
},
"url": "https://drafts.csswg.org/css-logical/",
"keywords": ["css", "css-logical", "flow-relative", "logical"],
"category": "css",
"contact": {
"name": "Oriol Brufau",
"email": "[email protected]"
}
},
{
"name": "CSS Masking Level 1",
"url": "https://drafts.fxtf.org/css-masking-1/",
"status": {
"status": "In Development"
},
"keywords": ["css masking", "clip-path", "clipping", "masking", "mask"],
"category": "css",
"contact": {
"name": "Dirk Schulze",
"twitter": "@dirkschulze",
"email": "[email protected]"
}
},
{
"name": "CSS Media Queries Level 4",
"url": "http://dev.w3.org/csswg/mediaqueries-4/",
"keywords": ["css media queries", "media queries"],
"category": "css"
},
{
"name": "CSS Painting API Level 1",
"status": {
"status": "In Development"
},
"url": "https://drafts.css-houdini.org/css-paint-api-1/",
"keywords": ["css", "houdini", "worklet"],
"webkit-url": "https://bugs.webkit.org/show_bug.cgi?id=190217",
"category": "css"
},
{
"name": "CSS Positioned Layout Module Level 3",
"url": "http://dev.w3.org/csswg/css-position/",
"keywords": ["css positioning"],
"category": "css"
},
{
"name": "CSS Properties and Values API Level 1",
"status": {
"status": "In Development"
},
"url": "https://drafts.css-houdini.org/css-properties-values-api/",
"webkit-url": "https://bugs.webkit.org/show_bug.cgi?id=189692",
"keywords": ["css", "houdini", "custom properties"],
"description": "An API for registering new CSS properties. Properties registered using this API are provided with a parse syntax that defines a type, inheritance behaviour, and an initial value.",
"category": "css"
},
{
"name": "CSS Rhythmic Sizing",
"status": {
"status": "Under Consideration",
"enabled-by-default": false
},
"url": "https://drafts.csswg.org/css-rhythm/",
"keywords": ["css rhythmic sizing", "rhythmic sizing", "step sizing"],
"category": "css",
"description": "Allows block content to set a simple grid to which lines will adhere.",
"contact": {
"name": "Myles C. Maxfield",
"twitter": "@Litherum",
"email": "[email protected]"
}
},
{
"name": "CSS Scroll Snap Points Module Level 1",
"status": {
"status": "Supported"
},
"url": "http://dev.w3.org/csswg/css-snappoints/",
"webkit-url": "https://bugs.webkit.org/show_bug.cgi?id=134283",
"keywords": ["css scroll snap points", "scroll snap", "snap points"],
"category": "css",
"contact": {
"name": "Brent Fulgham",
"email": "[email protected]"
}
},
{
"name": "CSS Selectors Level 4",
"url": "http://dev.w3.org/csswg/selectors-4/",
"keywords": ["css selectors", "selectors"],
"category": "css",
"contact": {
"name": "Benjamin Poulain",
"twitter": "@awfulben",
"email": "[email protected]"
}
},
{
"name": "CSS Shadow Parts",
"status": {
"status": "Supported"
},
"url": "https://drafts.csswg.org/css-shadow-parts/",
"webkit-url": "https://webkit.org/b/149443",
"keywords": ["css selectors", "selectors", "shadow dom", "shadow parts"],
"category": "css",
"description": "Allows web components to define and expose stylable parts",
"contact": {
"name": "Ryosuke Niwa",
"twitter": "@rniwa_dev",
"email": "[email protected]"
}
},
{
"name": "CSS Text Decoration Level 4",
"status": {
"status": "Supported"
},
"url": "https://drafts.csswg.org/css-text-decor-4/",
"keywords": ["css text decoration", "text decoration"],
"category": "css",
"description": "Allows content to specify properties of text decorations such as underlines.",
"contact": {
"name": "Myles C. Maxfield",
"twitter": "@Litherum",
"email": "[email protected]"
}
},
{
"name": "CSS Typed OM Level 1",
"status": {
"status": "Under Development"
},
"url": "https://drafts.css-houdini.org/css-typed-om/",
"keywords": ["css", "houdini"],
"category": "css",
"description": "Exposes CSS values as typed JavaScript objects to facilitate their performant manipulation."
},
{
"name": "CSS Variables",
"status": {
"status": "Supported"
},
"url": "https://www.w3.org/TR/css-variables/",
"keywords": ["css variable", "css custom property"],
"category": "css",
"description": "Allows developers to define reusable custom property values.",
"contact": {
"name": "Jon Davis",
"twitter": "@jonathandavis",
"email": "[email protected]"
}
},
{
"name": "CSS Will Change",
"status": {
"status": "Supported"
},
"url": "https://drafts.csswg.org/css-will-change/",
"keywords": ["css willchange", "css will-change"],
"category": "css",
"contact": {
"name": "Simon Fraser",
"twitter": "@smfr"
}
},
{
"name": "Client-Side Storage Partitioning",
"status": {
"status": "Supported"
},
"url": "https://github.com/privacycg/storage-partitioning",
"keywords": ["privacy"],
"category": "privacy",
"description": "Preserve privacy and security of users by keying user-agent state on more than a single origin.",
"contact": {
"name": "John Wilander",
"twitter": "@johnwilander"
}
},
{
"name": "Content Security Policy Level 2",
"status": {
"status": "Supported"
},
"url": "https://w3c.github.io/webappsec-csp/2/",
"keywords": ["csp", "cross-site scripting", "xss", "injection", "header", "security"],
"category": "webapps",
"description": "A mechanism that web applications can use to mitigate content injection vulnerabilities, such as cross-site scripting (XSS). Developers can declare a CSP policy to prohibit their web application from loading content or executing scripts that have not been allowed among other capabilities.",
"contact": {
"name": "Daniel Bates",
"email": "[email protected]"
}
},
{
"name": "Content Security Policy Level 3",
"status": {
"status": "Partially Supported"
},
"url": "https://w3c.github.io/webappsec-csp/",
"keywords": ["csp", "cross-site scripting", "xss", "injection", "header", "security"],
"category": "webapps",
"contact": {
"name": "Daniel Bates",
"email": "[email protected]"
}
},
{
"name": "DOM",
"url": "https://dom.spec.whatwg.org",
"keywords": ["dom", "dom4"],
"category": "html"
},
{
"name": "Encoding",
"status": {
"status": "Supported"
},
"url": "https://encoding.spec.whatwg.org",
"webkit-url": "https://bugs.webkit.org/show_bug.cgi?id=163771",
"keywords": ["encoding", "TextEncoder", "TextDecoder", "request", "response", "header"],
"category": "webapps",
"description": "TextEncoder and TextDecoder APIs for converting text from different character sets.",
"contact": {
"name": "Alex Christensen",
"twitter": "@alexfchr",
"email": "[email protected]"
}
}, {
"name": "Fetch",
"status": {
"status": "Supported"
},
"url": "https://fetch.spec.whatwg.org",
"webkit-url": "https://bugs.webkit.org/show_bug.cgi?id=151937",
"keywords": ["fetch", "http", "cors", "request", "response", "header"],
"category": "webapps",
"description": "An underlying unified architecture for making resource requests.",
"contact": {
"name": "Jon Davis",
"twitter": "@jonathandavis",
"email": "[email protected]"
}
},
{
"name": "Filter Effects Module Level 2",
"url": "http://dev.w3.org/fxtf/filters-2/",
"keywords": ["css filters", "filter effects", "filters"],
"category": "css"
},
{
"name": "Geometry Interfaces",
"url": "https://drafts.fxtf.org/geometry/",
"keywords": ["geometry", "dompointreadonly", "dompoint", "domrectreadonly", "domrect", "domquad", "dommatrixreadonly", "dommatrix"],
"category": "html",
"status": {
"status": "In Development"
},
"webkit-url": "https://bugs.webkit.org/show_bug.cgi?id=163505"
},
{
"name": "HTML5",
"url": "https://html.spec.whatwg.org",
"keywords": ["html", "html5", "html5.1"],
"category": "html"
},
{
"name": "Indexed Database",
"status": {
"status": "Supported"
},
"url": "http://www.w3.org/TR/IndexedDB/",
"webkit-url": "https://bugs.webkit.org/show_bug.cgi?id=149117",
"keywords": ["indexeddb", "index db", "indexed db", "indexed database", "idb"],
"description": "A standard interface to a database of records for simple values and objects. WebKit supports the full W3C recommended standard.",
"contact": {
"name": "Brady Eidson",
"twitter": "@bradeeoh",
"email": "[email protected]"
}
},
{
"name": "Indexed Database 2.0",
"status": {
"status": "Supported"
},
"url": "http://w3c.github.io/IndexedDB/",
"webkit-url": "https://bugs.webkit.org/show_bug.cgi?id=160306",
"keywords": ["indexeddb", "index db", "indexed db", "indexed database", "idb"],
"description": "Version 2.0 of the Indexed Database API. We are participating in development of the standard and are implementing new features as they stabilize.",
"contact": {
"name": "Brady Eidson",
"twitter": "@bradeeoh",
"email": "[email protected]"
}
},
{
"name": "Intersection Observer",
"status": {
"status": "Supported"
},
"url": "https://wicg.github.io/IntersectionObserver/",
"webkit-url": "https://bugs.webkit.org/show_bug.cgi?id=159475",
"keywords": ["intersection", "intersection observer", "intersectionobserver"],
"description": "An API that can be used to understand the visibility and position of DOM elements relative to a containing element or to the top-level viewport."
},
{
"name": "Lazy image loading",
"status": {
"status": "In Development"
},
"url": "https://html.spec.whatwg.org/#attr-img-loading",
"keywords": ["lazy", "image", "loading"],
"category": "html",
"description": "Allows defering loading of images until they are visible in the viewport."
},
{
"name": "Navigation Timing Level 1",
"status": {
"status": "Supported"
},
"url": "https://www.w3.org/TR/navigation-timing/",
"keywords": ["performance", "navigation timing"],
"description": "An API that exposes page load measurements to the page."
},
{
"name": "Navigation Timing Level 2",
"status": {
"status": "Supported"
},
"url": "https://w3c.github.io/navigation-timing/",
"keywords": ["performance", "navigation timing"],
"description": "An API that exposes page load measurements to the page and adds entries to the performance timeline.",
"contact": {
"name": "Alex Christensen",
"twitter": "@alexfchr",
"email": "[email protected]"
}
},
{
"name": "Performance Observer",
"status": {
"status": "Supported"
},
"url": "https://w3c.github.io/performance-timeline/",
"keywords": ["performance", "performance observer", "performanceobserver", "performance timeline"],
"description": "An API to observe performance timeline entries at idle times.",
"contact": {
"name": "Joseph Pecoraro",
"email": "[email protected]",
"twitter": "@JosephPecoraro"
}
},
{
"name": "Pointer Events Level 2",
"status": {
"status": "Supported"
},
"url": "https://www.w3.org/TR/pointerevents/",
"keywords": ["dom", "events", "touch", "mouse", "stylus"],
"category": "html",
"description": "Pointer Events describes events and related interfaces for handling hardware agnostic pointer input from devices including a mouse, pen, touchscreen, etc."
},
{
"name": "Pointer Lock",
"status": {
"status": "Supported"
},
"url": "https://www.w3.org/TR/pointerlock/",
"webkit-url": "https://bugs.webkit.org/show_bug.cgi?id=164652",
"keywords": ["pointer", "pointer lock"],
"description": "Provides scripted access to raw mouse movement data while locking the target of mouse events to a single element and removing the cursor from view."
},
{
"name": "Preload",
"status": {
"status": "Supported"
},
"url": "http://w3c.github.io/preload/",
"webkit-url": "https://webkit.org/b/158720",
"keywords": ["preload"],
"description": "Provides a declarative fetch primitive that initiates an early fetch and separates fetching from resource execution.",
"contact": {
"name": "Yoav Weiss",
"email": "[email protected]",
"twitter": "@yoavweiss"
}
},
{
"name": "Resource Timing Level 2",
"status": {
"status": "Supported"
},
"url": "https://w3c.github.io/resource-timing/",
"webkit-url": "https://webkit.org/b/61138",
"keywords": ["performance", "resourcetiming", "resource timing", "rsrc"],
"description": "An API to that provides detailed timing information for resource loads.",
"contact": {
"name": "Joseph Pecoraro",
"email": "[email protected]",
"twitter": "@JosephPecoraro"
}
},
{
"name": "SVG 2",
"url": "https://svgwg.org/svg2-draft/",
"status": {
"status": "In Development"
},
"keywords": ["svg"],
"category": "svg",
"contact": {
"name": "Dirk Schulze",
"twitter": "@dirkschulze",
"email": "[email protected]"
}
},
{
"name": "SVG in OpenType Fonts",
"status": {
"status": "Supported"
},
"url": "https://www.microsoft.com/typography/otspec/svg.htm/",
"keywords": ["svg", "font", "opentype", "OT-SVG"],
"category": "rendering",
"description": "Allows Scalable Vector Graphics content within font files.",
"contact": {
"name": "Myles C. Maxfield",
"twitter": "@Litherum",
"email": "[email protected]"
}
},
{
"name": "Service Workers",
"status": {
"status": "Supported"
},
"url": "https://w3c.github.io/ServiceWorker/",
"webkit-url": "https://webkit.org/b/174541",
"keywords": ["service workers"],
"category": "webapps",
"description": "A method for browsers to run JavaScript in the background to handle network requests and manage cached responses. Service Workers offers a replacement for Application Cache.",
"contact": {
"name": "Brady Eidson",
"twitter": "@bradeeoh",
"email": "[email protected]"
}
},
{
"name": "Streams",
"url": "https://streams.spec.whatwg.org",
"keywords": ["streams api"],
"category": "webapps"
},
{
"name": "User Timing Level 2",
"status": {
"status": "Supported"
},
"url": "https://w3c.github.io/user-timing/",
"keywords": ["performance", "usertiming", "user timing"],
"description": "Provides high precision timestamp marking APIs.",
"contact": {
"name": "Jonathan Davis",
"email": "[email protected]",
"twitter": "@jonathandavis"
}
},
{
"name": "WOFF File Format 2.0",
"status": {
"status": "Supported"
},
"url": "https://www.w3.org/TR/WOFF2/",
"keywords": ["woff"],
"category": "css",
"description": "Improves compression to reduce bandwidth with content-aware preprocessing.",
"contact": {
"name": "Jonathan Davis",
"email": "[email protected]",
"twitter": "@jonathandavis"
}
},
{
"name": "Web Animations",
"status": {
"status": "Supported"
},
"url": "https://www.w3.org/TR/web-animations-1/",
"keywords": ["web animations"],
"description": "An API to synchronize with the timing for presentation changes of a web page.",
"contact": {
"name": "Jonathan Davis",
"email": "[email protected]",
"twitter": "@jonathandavis"
}
},
{
"name": "Web App Manifest",
"status": {
"status": "Partially Supported",
"enabled-by-default": false
},
"url": "https://www.w3.org/TR/appmanifest/",
"webkit-url": "https://webkit.org/b/158205",
"keywords": ["web app","manifest", "webapp"],
"category": "webapps",
"description": "A JSON-format manifest file for developers to place metadata associated with a web application.",
"contact": {
"name": "Jonathan Davis",
"email": "[email protected]",
"twitter": "@jonathandavis"
}
},
{
"name": "Web Components",
"url": "http://www.w3.org/wiki/WebComponents/",
"keywords": ["web components", "shadow dom", "html imports", "custom elements", "template element"],
"category": "webapps",
"description": "A collection of technologies to improve modularization of DOM subtrees.",
"contact": {
"name": "Ryosuke Niwa",
"twitter": "@rniwa_dev",
"email": "[email protected]"
}
},
{
"name": "Web Cryptography API",
"status": {
"status": "Supported"
},
"url": "http://www.w3.org/TR/WebCryptoAPI/",
"webkit-url": "https://bugs.webkit.org/show_bug.cgi?id=160880",
"keywords": ["webcrypto", "web cryptography api", "crypto", "security"],
"category": "webapps",
"description": "A JavaScript API for web applications to perform cryptographic operations.",
"contact": {
"name": "Jiewen Tan",
"email": "[email protected]",
"twitter": "@alanwaketan"
}
},
{
"name": "Web SQL Database",
"status": {
"status": "Removed"
},
"url": "https://dev.w3.org/html5/webdatabase/",
"keywords": ["websql", "web sql", "db", "storage", "database"],
"description": "An API for storing data in databases that can be queried using a variant of SQL.",
"contact": {
"name": "Jon Davis",
"twitter": "@jonathandavis",
"email": "[email protected]"
}
},
{
"name": "WebGL 1",
"status": {
"status": "Supported"
},
"url": "https://www.khronos.org/registry/webgl/specs/1.0/",
"keywords": ["webgl"],
"category": "html"
},
{
"name": "WebGL 2",
"status": {
"status": "Supported"
},
"url": "https://www.khronos.org/registry/webgl/specs/latest/2.0/",
"keywords": ["webgl"],
"category": "html"
},
{
"name": "Worklets Level 1",
"status": {
"status": "Under Consideration"
},
"url": "https://drafts.css-houdini.org/worklets/",
"keywords": ["houdini", "worklet"],
"description": "An API for running scripts in stages of the rendering pipeline independent of the main javascript execution environment"
}
],
"features": [
{
"name": "CSS Selector :any-link",
"status": {
"status": "Supported"
},
"url": "http://dev.w3.org/csswg/selectors-4/#the-any-link-pseudo",
"specification": "CSS Selectors Level 4",
"description": "The pseudo class :any-link matches any element that would match :link or :visisted.",
"comment": "A prefix version :-webkit-any-link has been available for a while but it was not 100% compliant to the specification.",
"contact": {
"name": "Benjamin Poulain",
"twitter": "@awfulben",
"email": "[email protected]"
}
},
{
"name": "CSS Selector :focus-visible",
"status": {
"status": "In Development",
"enabled-by-default": false
},
"url": "https://drafts.csswg.org/selectors-4/#the-focus-visible-pseudo",
"specification": "CSS Selectors Level 4",
"keywords": ["focus visible", "focus-visible", ":focus-visible"],
"description": "The selector :focus-visible matches an element that has received focus and the user-agent has determined that the focus should be made visible on the element.",
"contact": {
"name": "Manuel Rego",
"twitter": "@regocas",
"email": "[email protected]"
}
},
{
"name": "CSS Selector :focus-within",
"status": {
"status": "Supported"
},
"url": "https://drafts.csswg.org/selectors-4/#the-focus-within-pseudo",
"webkit-url": "https://trac.webkit.org/changeset/202358",
"specification": "CSS Selectors Level 4",
"description": "The selector :focus-within matches an element if the element or a descendant has the focus.",
"contact": {
"name": "Benjamin Poulain",
"twitter": "@awfulben",
"email": "[email protected]"
}
},
{
"name": "CSS Selector :is()",
"status": {
"status": "Supported"
},
"url": "http://dev.w3.org/csswg/selectors-4/#matches",
"specification": "CSS Selectors Level 4",
"description": "The selector :is() takes a selector list as argument and is an element if any of them is (e.g. :is(article > section, #target)). When used for styling, the specificity of :is() is the higest specificity of all selectors in the selector list.",
"comment": "The pseudo classes <em>:visited</em> and <em>:link</em> are not supported inside :is()."
},
{
"name": "CSS Selector :lang() level 4",
"status": {
"status": "Supported"
},
"url": "http://dev.w3.org/csswg/selectors-4/#the-lang-pseudo",
"specification": "CSS Selectors Level 4",
"description": "The selector :lang() is extended in level 4 to support a list of language range, each range can contain a wildcard. For example: p:lang(\"*-be\", \"en\")."
},
{
"name": "CSS Selector :matches()",
"status": {
"status": "Supported"
},
"url": "http://dev.w3.org/csswg/selectors-4/#matches",
"specification": "CSS Selectors Level 4",
"description": "The selector :matches() takes a selector list as argument and matches an element if any of them matches (e.g. :matches(article > section, #target)). When used for styling, the specificity of :matches() is the higest specificity of all selectors in the selector list.",
"comment": "The pseudo classes <em>:visited</em> and <em>:link</em> are not supported inside :matches().",
"contact": {
"name": "Benjamin Poulain",
"twitter": "@awfulben",
"email": "[email protected]"
}
},
{
"name": "CSS Selector :not() level 4",
"status": {
"status": "Supported"
},
"url": "http://dev.w3.org/csswg/selectors-4/#negation",
"specification": "CSS Selectors Level 4",
"description": "The selector :not() in level 4 supports full selector lists as argument. For example: :not(:any-link >> img, :any-link >> picture).",
"comment": "The pseudo classes <em>:visited</em> and <em>:link</em> are not supported inside :not().",
"contact": {
"name": "Benjamin Poulain",
"twitter": "@awfulben",
"email": "[email protected]"
}
},
{
"name": "CSS Selector :nth-child(An+B of selector list) and :nth-last-child(An+B of selector list)",
"status": {
"status": "Supported"
},
"url": "http://dev.w3.org/csswg/selectors-4/#the-nth-child-pseudo",
"specification": "CSS Selectors Level 4",
"description": "The pseudo classes :nth-child() and :nth-last-child() now supports a selector list that filters what to count. For example: \":nth-child(even of .visible)\".",
"comment": "The pseudo classes <em>:visited</em> and <em>:link</em> are not supported inside :nth-child() and :nth-last-child().",
"contact": {
"name": "Benjamin Poulain",
"twitter": "@awfulben",
"email": "[email protected]"
}
},
{
"name": "CSS Selector :placeholder-shown",
"status": {
"status": "Supported"
},
"url": "http://dev.w3.org/csswg/selectors-4/#placeholder",
"specification": "CSS Selectors Level 4",
"description": "The selector :placeholder-shown matches any input element that has a visible placeholder.",
"comment": "Styling the placeholder can be done through the WebKit pseudo-element \"::placeholder\".",
"contact": {
"name": "Benjamin Poulain",
"twitter": "@awfulben",
"email": "[email protected]"
}
},
{
"name": "CSS Shapes Level 1",
"status": {
"status": "Supported"
},
"url": "http://www.w3.org/TR/css-shapes-1/",
"description": "CSS Shapes describe geometric shapes for use in CSS. For Level 1, CSS Shapes can be applied to floats.",
"comment": "The implementation is feature complete and shipping, but is -webkit prefixed."
},
{
"name": "Case-insensitive attribute selectors",
"status": {
"status": "Supported"
},
"url": "http://dev.w3.org/csswg/selectors-4/#attribute-case",
"specification": "CSS Selectors Level 4",
"description": "Any attribute selector that test a value can take a flag \"i\" to use case insensitive checks. For example: input[type=number i] test the value \"number\" case-insensitively.",
"contact": {
"name": "Benjamin Poulain",
"twitter": "@awfulben",
"email": "[email protected]"
}
},
{
"name": "Conic Gradients",
"status": {
"status": "Supported"
},
"url": "https://www.w3.org/TR/css4-images/#conic-gradients",
"specification": "CSS Image Values and Replaced Content Module Level 4",
"description": "Defines gradients wrapped around a central point.",
"contact": {
"name": "Jonathan Davis",
"email": "[email protected]",
"twitter": "@jonathandavis"
}
},
{
"name": "Cross-Origin Resource Policy",
"status": {
"status": "Supported"
},
"url": "https://fetch.spec.whatwg.org/#cross-origin-resource-policy-header",
"specification": "Fetch",
"keywords": ["security"],
"description": "Allows websites to protect against certain requests from other origins.",
"contact": {
"name": "Jon Davis",
"twitter": "@jonathandavis",
"email": "[email protected]"
}
},
{
"name": "Custom Elements",
"status": {
"status": "Supported"
},
"url": "http://w3c.github.io/webcomponents/spec/custom/",
"webkit-url": "https://bugs.webkit.org/show_bug.cgi?id=150225",
"specification": "Web Components",
"description": "Define a custom HTML tag and associate it with an ES6 class.",
"contact": {
"name": "Ryosuke Niwa",
"twitter": "@rniwa_dev",
"email": "[email protected]"
}
},
{
"name": "Datalist Element",
"status": {
"status": "Supported"
},
"url": "https://html.spec.whatwg.org/multipage/form-elements.html#the-datalist-element",
"webkit-url": "https://bugs.webkit.org/show_bug.cgi?id=27247",
"specification": "HTML5",
"category": "html",
"description": "The datalist element represents a set of option elements that represent predefined options for other controls.",
"contact": {
"name": "Jon Davis",
"twitter": "@jonathandavis",
"email": "[email protected]"
}
},
{
"name": "Date and Time Input Types",
"status": {
"status": "Partially Supported"
},
"url": "https://html.spec.whatwg.org/multipage/input.html#date-state-(type=date)",
"specification": "HTML5",
"category": "html",
"description": "Form controls that allow users to enter a date, time or both. Refers to the following types of input elements: date, time, datetime-local, month, and week.",
"comment": "The month input type is unsupported on macOS. The week input type is unsupported on macOS and iOS.",
"contact": {
"name": "Aditya Keerthi",
"email": "[email protected]"
}
},
{
"name": "Dialog Element",
"status": {
"status": "In Development"
},
"url": "https://html.spec.whatwg.org/multipage/interactive-elements.html#the-dialog-element",
"webkit-url": "https://bugs.webkit.org/show_bug.cgi?id=84635",
"specification": "HTML5",
"category": "html",
"description": "The dialog element represents a part of an application that a user interacts with to perform a task, for example a dialog box, inspector, or window.",
"contact": {
"name": "Jon Davis",