Zstandard or zstd is fast lossless compression algorithm. When used as a content...

The zoom CSS property scales the size of an element. Unlike the transform proper...

The XMLHttpRequest API makes HTTP requests. It's the predecessor to fetch(). Als...

The window.getScreenDetails() method gets information about the screens on a dev...

The window global object represents a browser tab or iframe and its relationship...

The wheel event fires when the user moves a mouse wheel or similar spatially rot...

WebVTT regions set the areas of the video where captions or subtitles should be ...

The VTTCue API updates various aspects of cues dynamically, such as alignment, s...

The WebVTT cue alignment settings control which part of the cue is aligned with ...

WebVTT is a captions and subtitles format. WebVTT files are loaded using the <tr...

The navigator.getVRDisplays() API represents virtual reality (VR) devices, inclu...

The WebUSB API exposes USB compatible devices to web pages.

The WebTransport API transmits data between a client and a server, by using the ...

The WebSocket API opens a two-way communication channel between the user's brows...

The WebP image format is a raster graphics file format that supports animation, ...

The WebNN API constructs and executes computational graphs of neural networks by...

The WebHID API provides access to Human Interface Devices (HID) that are connect...

The navigator.gpu API performs operations such as rendering and computation on d...

The optional desynchronized parameter of a canvas's getContext() method permits ...

The drawingBufferColorSpace and unpackColorSpace properties of WebGL2RenderingCo...

The WebGL2RenderingContext API is the "webgl2" rendering context for the <canvas...

The WebCodecs API provides low-level access to individual video frames and chunk...

The NDEFReader API reads and writes messages to near-field communication (NFC) t...

The Web MIDI API enables selecting MIDI input and output devices and sending and...

The navigator.locks API coordinates work with shared resources through mutually ...

The Web Bluetooth API enables selecting and communicating with nearby Bluetooth ...

The visualViewport API provides a way to query and modify the user-visible viewp...

The navigator.virtualKeyboard API inspects and controls on-screen virtual keyboa...

The sv*, lv*, and dv* CSS viewport units are relative to the smallest, largest, ...

The viewport segment CSS environment variables and media features, and the viewp...

The navigator.vibrate() method makes a tactile alert, if the device is equipped ...

The navigator.userAgent property is the user agent string for the current browse...

The URLPattern API creates patterns that can be matched against URLs or URL comp...

The URL.canParse() static method checks whether a URL can be parsed into a valid...

A URL object represents a web address, like https://example.com/, and parts of t...

The Sec-CH-UA HTTP request header and the navigator.userAgentData API expose bro...

The translate HTML attribute marks whether an element's text should be translate...

The transform-box CSS property sets the position and dimensions of the reference...

The transfer() and transferToFixedLength() methods of ArrayBuffer move a buffer ...

Touch events touchstart, touchmove, touchend, and touchcancel fire when users in...

The touch-action CSS property sets whether an element on a touch screen can be p...

The title global HTML attribute sets information about an element, such as a nam...

The text-size-adjust CSS property disables or modifies the browser's default tex...

The TextEncoder API transforms a stream of code points into a byte stream with U...

The text-emphasis CSS property sets position and style for text emphasis marks, ...

The text-decoration CSS property sets the style and color of decorative lines in...

The text-autospace CSS property sets whether and how to insert spaces in inter-s...

The SVG 1.1 image format has several components that were excluded from SVG 2, s...

The Summarizer API uses an on-device language model to summarize text.

The structuredClone() global method creates a deep copy of an object. Values tha...

The spellcheck global HTML attribute sets whether the browser may check an eleme...

Speculation rules are hints to the browser to proactively download pages in the ...

The Sourcemap HTTP response header links generated code to a source map, so the ...

The withLock option to set(), append(), delete(), clear(), and batchUpdate() met...

The navigator.share() method invokes the device's native sharing mechanism and p...

The setTimeout() global function executes provided code after a given duration o...

The setInterval() global function repeatedly executes provided code on a given d...

The DOMException, Error, EvalError, RangeError, ReferenceError, SyntaxError, Typ...

The navigator.serial API communicates with devices over serial ports, such as mi...

The scroll-initial-target: nearest CSS declaration sets the initial scroll posit...

The scroll() and scrollBy() methods change the scroll position of overflow conte...

The navigator.wakeLock.request("screen") API prevents the device's screen from d...

The screen.orientation.lock() method prevents changes to the screen orientation,...

The screen.orientation API gets information about the orientation of the viewpor...

The navigator.mediaDevices.getDisplayMedia() method asks the user to choose a sc...

The window.screen property contains information about the screen of the output d...

The scheduler API provides a way to prioritize all tasks belonging to an applica...

Browsers send the Save-Data HTTP request header when the user turns on a data-sa...

The Document.parseHTML() static method and the setHTML() method of Element and S...

The ResizeObserver API observes and reacts to changes in the size of DOM element...

The resize() method of an ArrayBuffer and the grow() method of a SharedArrayBuff...

The requestIdleCallback() API queues a function that runs in idle browser time, ...

The requestAnimationFrame() method schedules a function that runs before the nex...

The Reporting-Endpoints HTTP header and ReportingObserver() API send reports of ...

The Remote Playback API initiates and controls playback of media on connected re...

The navigator.registerProtocolHandler() method declares a site's ability to hand...

The CSS.registerProperty() static method and the @property CSS at-rule register ...

When using navigator.mediaDevices.getDisplayMedia() to capture a browser tab as ...

The RegExp object has several static properties to access the input and results ...

The RegExp.escape() static method takes a string and replaces any characters tha...

The compile() method of RegExp objects recompiles an existing regular expression...

The RegExp object represents a regular expression, a notation for matching text ...

The Referrer-Policy HTTP header and referrerpolicy HTML attributes control wheth...

The Push API subscribes to and receives server-initiated messages. Subscribers r...

The __proto__ property of objects partially exposes the prototype of an object.

The Profiler API records data about the execution of a page, which you can send ...

The Access-Control-Request-Private-Network: true and Access-Control-Allow-Privat...

The attributionsourceid and attributiondestination attributes for <a> elements m...

The Presentation API shows or controls content on another display, such as a net...

The imagesrcset and imagesizes attributes with the rel="preload" attribute for t...

The <portal> HTML element embeds another page into the current page as a non-int...

Provides access to raw mouse movement by locking the target of mouse events to a...

Pointer events, such as pointerdown, and the PointerEvent API, represent general...

The ping attribute for <a> elements sets a URL to send a POST request to when th...

The picture-in-picture API allow websites to create a floating, always-on-top vi...

The periodic background synchronization API fires a recurring periodicsync event...

The navigator.pdfViewerEnabled property is a boolean for whether the browser nav...

The path() CSS shape function creates a shape for clip-path, shape-outside, and ...

The Document.parseHTMLUnsafe() static method parses HTML into a DOM tree, while ...

The document.visibilityState and document.hidden properties tell you whether the...

The pageshow and pagehide transition events fire when a document loads or unload...

The page lifecycle API helps you safely handle page suspensions or discards from...

The outline-color, outline-style, and outline-width and outline-offset CSS prope...

The outline CSS shorthand sets the color, style, and width of a line around an e...

The navigator.onLine property is a boolean for whether the browser is connected ...

The when() method on a event target returns an Observable object, which provides...

The object-position CSS property places images, videos, and other replaced eleme...

Objects in JavaScript are collections of key-value pairs.

The Object.hasOwn() static method checks whether an object has a given property....

The object-fit CSS property sets how images, videos, and other replaced elements...

Notifications via service worker registration's showNotification() method, sent ...

The Notification() constructor shows a message to the user, typically using the ...

The navigator.connection API provides information about the network connection a...

The window.navigator API is a generic global object, under which many other, mor...

The navigation API initiates, intercepts, or modifies browser navigation actions...

Mouse events, such as click, mousedown, or mousemove, fire when users interact w...

The rel="modulepreload" attribute for the <link> HTML element indicates that a m...

The min-width, min-height, max-width, and max-height CSS properties set the mini...

The MediaRecorder API captures data generated by MediaStream or HTMLMediaElement...

The playback of multiple <video> or <audio> elements can be coordinated by a Med...

The MediaSource API is a custom data source for media elements commonly used for...

The navigator.mediaSession API integrates with platform UI for media playback. I...

The getVideoPlaybackQuality() method of HTMLVideoElement returns metrics that ca...

The navigator.mediaDevices.getUserMedia() API requests access to devices that pr...

The navigator.mediaCapabilities API queries the encoding and decoding abilities ...

MathML, or the Mathematical Markup Language, describes mathematical notation, su...

The window.matchMedia() method checks whether a media query applies to the docum...

The ManagedMediaSource API is a MediaSource where the browser manages the memory...

The location global object represents the current page's address. You can use it...

The "local-network-access" user permission (and certain actions that imply this ...

The window.queryLocalFonts() method returns an array of locally-installed fonts,...

The loading="lazy" attribute for <img> and <iframe> elements blocks loading the ...

The rel="preload" attribute for the <link> HTML element requests resources, such...

The rel="prefetch" attribute for the <link> HTML element is a hint to the browse...

The rel="preconnect" attribute for the <link> HTML element is a hint to the brow...

The rel="expect" attribute for the <link> HTML element is a hint to the browser ...

The rel="dns-prefetch" attribute for the <link> HTML element is a hint to the br...

The navigator.language property is a string representing the preferred language ...

The lang global HTML attribute defines the language of an element. It's used by ...

The navigator.keyboard.getLayoutMap() API returns a map from key codes to human ...

The navigator.keyboard.lock() API allows you to capture keys that are normally r...

The keydown and keyup events fire for each key press (or, with modifier keys, a ...

The JPEG XL image format is a raster graphics file format that supports animatio...

The isSecureContext global property is a boolean for whether the current browsin...

The navigator.scheduling.isInputPending() method checks if there are pending inp...

The Error.isError() static method checks whether a value is an Error object.

The command and commandfor attributes for the <button> HTML element dispatch an ...

The trackVisibility parameter for the IntersectionObserver constructor enables t...

The IntersectionObserver API asynchronously observes changes in the intersection...

The interactivity: inert CSS declaration makes an element and its descendants in...

The MediaStreamTrackProcessor and MediaStreamTrackGenerator APIs modify the cont...

The inputmode global HTML attribute gives a hint about what type of data is to b...

The input event fires when a form control changes or an element with the content...

The navigator.ink API uses the system compositor to draw to a <canvas> element a...

The IndexedDB API is a local storage transactional object database.

A <script type="importmap"> HTML element provides an import map as a JSON string...

Module import … assert { type: "json" } and import … assert { type: "css" } Java...

The ImageBitmapRenderingContext API is the "bitmaprenderer" rendering context fo...

The srcdoc attribute for the <iframe> HTML element sets a string of HTML to embe...

The sandbox attribute for the <iframe> HTML element sets many security restricti...

The IdleDetector API is used to notify a webpage of the user's idle, active, and...

HTTP/3 is a major revision of the HTTP network protocol, providing improved perf...

The HTTP/2 protocol is a major revision of the HTTP network protocol, providing ...

HTTP/1.1 is a network protocol used by browsers and servers. It has been superse...

The Authorization and WWW-Authenticate headers authenticate a user with a server...

The window.history API manipulates the browser session history, from navigations...

Custom highlights style arbitrary text ranges, without adding extra elements to ...

The hashchange event fires when the URL fragment identifier (the part of the URL...

The navigator.hardwareConcurrency property is the number of logical processors a...

The hanging-punctuation CSS property puts punctuation characters outside of the ...

The Sec-GPC request header indicates that the user does not consent to a website...

The getOrInsert() and getOrInsertComputed() methods of Map objects get a value, ...

The getBoxQuads() method, when called on a document, element, pseudo-element, or...

The navigator.gelocation API requests the user's latitude, longitude, heading, a...

The fullscreen API makes a specific element fill the whole screen and hides most...

The document.fonts API dynamically loads custom fonts and tracks when fonts are ...

The font-family: system-ui CSS declaration uses the operating system default fon...

The font-family: math CSS declaration uses the browser default font face for dis...

Focus events, such as focus and blur, fire when an element gets or loses focus.

The File API represents and reads from file data and metadata. Typically, you ge...

The fetchLater() method requests a deferred fetch sent at an unknown time. The b...

A fetch() request uploads a stream of data to the server when a request's body p...

The fetch() priority option and the fetchpriority HTML attribute give hints to t...

The Sec-Fetch-Dest, Sec-Fetch-Mode, Sec-Fetch-Site, and Sec-Fetch-User HTTP head...

The fetch() method makes asynchronous HTTP requests.

The <fencedframe> element embeds another HTML page into the current page in a mo...

The EyeDropper API opens an eyedropper tool, a color picker that allows users to...

The window.external.AddSearchProvider() and window.external.IsSearchProviderInst...

The using and await using declarations and the dispose and asyncDispose symbols ...

The Event API and the addEventListener() method on objects that receive events (...

The cause property of errors records the specific original cause of the error, p...

The enterkeyhint global HTML attribute sets the label for a virtual keyboard's E...

The mediaKeys property of HTMLMediaElement and the navigator.requestMediaKeySyst...

The document.elementFromPoint() and document.elementsFromPoint() methods find th...

The restrictTo() method on screen capture media tracks limits capture to a speci...

The element() CSS function creates a live-updating image from an HTML element th...

The EditContext API allows you to build rich text editors that support advanced ...

TLS 1.3 sessions may be resumed more quickly by sending so-called early data to ...

The Drag and Drop API lets users drag and drop elements and external files such ...

The download attribute for <a> elements loads the target URL as a file to be sav...

The DOMMatrix, DOMPoint, DOMQuad and DOMRect APIs represent points, rectangles, ...

The document.open(), document.write(), document.writeln(), and document.close() ...

The document picture-in-picture API creates an always-on-top window from arbitra...

A document's bgColor, fgColor, alinkColor, linkColor, and vlinkColor properties ...

The document.caretPositionFromPoint() method finds an insertion point, represent...

The dirname attribute of <textarea> and <input> HTML elements includes the field...

The window.getDigitalGoodsService API connects to stores or billing services for...

The window.devicePixelRatio property is the ratio of the size of one CSS pixel t...

The device posture API and the device-posture CSS media feature reflect the phys...

The navigator.deviceMemory property is the approximate amount of device memory, ...

The toGMTString() method of Date objects is an alias to the toUTCString() method...

The dataset API attaches and accesses custom data on elements, using either the ...

Data URLs are URLs that start with the data: scheme and which directly contain d...

The text-overflow CSS property with a string value sets the string representing ...

The createImageBitmap() global method creates an ImageBitmap object from a sourc...

The corner-shape CSS property sets the shape of an element's corners when using ...

The contenteditable="plaintext-only" global HTML attribute allows the user to ed...

The contenteditable global HTML attribute allows the user to edit the content of...

The Content Index API allows developers to register their offline enabled conten...

The navigator.contacts API allows you to ask users to share limited details abou...

The CSSStyleSheet constructor creates a new stylesheet which can be shared betwe...

The CompressionStream and DecompressionStream APIs compress and decompress data ...

Compression Dictionary Transport is a mechanism for using designated HTTP respon...

The compositionstart, compositionupdate, and compositionend events fire when an ...

The CloseWatcher API listens and responds to close requests on in-page component...

The Clear-Site-Data header deletes browsing data (such as cookies, storage, or c...

The checkVisibility() method checks if an element is potentially visible, with o...

The change event for <input>, <select>, and <textarea> elements fires when the u...

Brotli is a lossless data compression algorithm. When used as a content encoding...

The box-decoration-break CSS property sets whether box decorations, such as bord...

The beforeunload event is fired when the current window is about to be unloaded....

The ::before and ::after CSS pseudo-elements select inline boxes preceding and f...

The navigator.sendBeacon() method asynchronously sends an HTTP POST request with...

The navigator.getBattery() API obtains information about the device's battery, i...

The baseline-source CSS property controls how inline-level boxes with multiple l...

The atob() and btoa() global functions encode and decode strings to and from bas...

The visible property of the window.locationbar, window.menubar, window.personalb...

The BarcodeDetector API recognizes various barcode formats in images.

The navigator.setAppBadge() method allows installed web applications to display ...

The background synchronization API registers a service worker callback to run on...

Background fetch downloads data in the background even when the web page is clos...

AVIF (AV1 Image File Format) is an image format based on the AV1 video format.

The autofocus HTML attribute gives focus to an element on page load.

The autocorrect global HTML attribute controls whether to automatically correct ...

The autocapitalize global HTML attribute sets the virtual keyboard capitalizatio...

The navigator.audioSession API controls how audio playback interacts with other ...

The Attribution Reporting API measures when an ad click or view leads to a conve...

The Atomics.pause() static method gives a hint to the CPU that the code calling ...

WAI-ARIA attributes have corresponding properties on Element and ElementInternal...

Anchor positioning places an element based on the position of another element. F...

The window.alert(), window.confirm(), and window.prompt() methods open modal dia...

The __defineGetter__() and __defineSetter__() methods of objects bind a function...

The accesskey global HTML attribute gives a hint for generating a keyboard short...

The AbortSignal.any() static method combines an iterable of abort signals into a...

The AbortController and AbortSignal APIs allow you to cancel an ongoing operatio...

If you construct a fetch request with an AbortSignal, you can cancel the request...

The XSLTProcessor API transforms XML documents into new XML or HTML documents, u...

The document.evaluate() method selects elements in an HTML or XML document based...

The SharedWorker() constructor runs a script in its own thread, which can send a...

The service worker of a website is a script that runs in its own thread and whic...

The requestAnimationFrame() method in workers schedules a function that runs bef...

The Worker() constructor runs a script in its own thread, which can send and rec...

The XRLightProbe and XRLightEstimate objects represent real-world environmental ...

WebXR layer types, such as XRCylinderLayer, XRCylinderLayer, XREquirectLayer, XR...

The getHitTestResults() method of an XRFrame object helps place objects in an au...

An XRHand object, from the hand attribute of an XRInputSource object, represents...

The gamepad attribute of an XRInputSource represents an XR input device, such as...

A DOM overlay shows 2D DOM content as an interactive, transparent layer on top o...

The navigator.xr API represents the browser's virtual reality or augmented reali...

An XRDepthInformation object represents a measurement of the distance from the u...

The XRView.camera property provides direct access to pose-synchronized camera im...

The "immersive-ar" value for navigator.xr.requestSession() starts an augmented r...

An XRAnchor object keeps track of a pose that is fixed relative to the real worl...

The RTCPeerConnection.getStats(), RTCRtpSender.getStats(), and RTCRtpReceiver.ge...

The sctp object on RTCPeerConnection represents the negotiated SCTP transport. S...

The WebRTC encoded transform API allows you to modify audio and video streams in...

The WebRTC API establishes real-time communication channels directly between bro...

SharedArrayBuffer objects can be used in WebGL APIs that previously only worked ...

The optional desynchronized parameter of a canvas's getContext() method permits ...

The drawingBufferColorSpace and unpackColorSpace properties of WebGLRenderingCon...

The WebGLRenderingContext API is the "webgl" rendering context for the <canvas> ...

The OES_draw_buffers_indexed extension for WebGL 2.0 contexts allows you to cont...

The WEBGL_multi_draw extension for WebGL 1.0 and 2.0 contexts renders more than ...

The WEBGL_lose_context extension for WebGL 1.0 and 2.0 contexts simulates losing...

The WEBGL_draw_buffers extension for WebGL 1.0 contexts enables a fragment shade...

The WEBGL_depth_texture extension for WebGL 1.0 contexts defines 2D depth and de...

The WEBGL_debug_shaders extension for WebGL 1.0 and 2.0 contexts adds the getTra...

The WEBGL_debug_renderer_info extension for WebGL 1.0 and 2.0 contexts exposes i...

The WEBGL_compressed_texture_s3tc_srgb extension for WebGL 1.0 and 2.0 contexts ...

The WEBGL_compressed_texture_s3tc extension for WebGL 1.0 and 2.0 contexts adds ...

The WEBGL_compressed_texture_pvrtc extension for WebGL 1.0 and 2.0 contexts adds...

The WEBGL_compressed_texture_etc1 extension for WebGL 1.0 and 2.0 contexts adds ...

The WEBGL_compressed_texture_etc extension for WebGL 1.0 and 2.0 contexts adds m...

The WEBGL_compressed_texture_astc extension for WebGL 1.0 and 2.0 contexts adds ...

The WEBGL_color_buffer_float extension for WebGL 1.0 contexts adds the 32-bit fl...

The OVR_multiview2 extension for WebGL 2.0 contexts renders into multiple views ...

The OES_vertex_array_object extension for WebGL 1.0 contexts adds vertex array o...

The OES_texture_half_float_linear extension for WebGL 1.0 contexts adds linear f...

The OES_texture_half_float extension for WebGL 1.0 contexts adds texture formats...

The OES_texture_float_linear extension for WebGL 1.0 and 2.0 contexts adds linea...

The OES_texture_float extension for WebGL 1.0 contexts adds floating-point pixel...

The OES_standard_derivatives extension for WebGL 1.0 contexts adds the GLSL deri...

The OES_fbo_render_mipmap extension for WebGL 1.0 contexts attaches any level of...

The OES_element_index_uint extension for WebGL 1.0 contexts adds support for gl....

The KHR_parallel_shader_compile extension for WebGL 1.0 and 2.0 contexts checks ...

The EXT_texture_norm16 extension to WebGL 2.0 contexts adds 16 bit signed normal...

The EXT_texture_filter_anisotropic extension for WebGL 1.0 and 2.0 contexts adds...

The EXT_texture_compression_rgtc extension for WebGL 1.0 and 2.0 contexts adds R...

The EXT_texture_compression_bptc extension for WebGL 1.0 and 2.0 contexts adds t...

The EXT_sRGB extension for WebGL 1.0 contexts adds sRGB support to textures and ...

The EXT_shader_texture_lod extension for WebGL 1.0 and 2.0 contexts adds texture...

The EXT_frag_depth extension for WebGL 1.0 and 2.0 contexts adds setting the dep...

The EXT_float_blend extension for WebGL 1.0 and 2.0 contexts adds 32-bit floatin...

The EXT_disjoint_timer_query extension for WebGL 1.0 contexts measures the durat...

The EXT_color_buffer_half_float extension for WebGL 1.0 and 2.0 contexts renders...

The EXT_color_buffer_float extension for WebGL 2.0 contexts adds color-renderabl...

The EXT_blend_minmax extension for WebGL 1.0 contexts adds two blend equations, ...

The ANGLE_instanced_arrays extension for WebGL 1.0 contexts draws the same objec...

WebDriver BiDi is a bidirectional protocol that allows a WebDriver client and a ...

The WebDriver protocol allows out-of-process programs to inspect and control bro...

A typed function reference can be called directly.

Threads in WebAssembly run code in parallel, while atomic memory instructions ca...

Tail call optimization discards a caller frame and replaces the call with a jump...

The WebAssembly builtin string functions mirror a subset of the JavaScript Strin...

Relaxed SIMD (Single Instruction Multiple Data) introduces local non-determinism...

128-bit SIMD (Single Instruction Multiple Data) performs one instruction on mult...

Sign-extension operator instructions extend the width of 8-bit, 16-bit, and 32-b...

The externref type can be both a value type and a table element type, while func...

Saturating floating-point to integer conversion operators return the maximum or ...

Mutable global variables are importable and exportable.

Instructions and blocks can produce multiple result values.

A single module in WebAssembly can have multiple memories.

Instructions accept 64-bit memory indexes.

Garbage collection tracks references for better memory management with garbage-c...

The i32.add, i32.sub, i32.mul, i64.add, i64.sub, and i64.mul operations extend c...

When caught, an exception is reified into an exception reference, a value of the...

Exceptions break the normal control flow of execution to represent exceptional b...

Bulk memory operations, such as copy and init, mirror the efficiency of native m...

Integer values pass bidirectionally between JavaScript and WebAssembly, converte...

The WebAssembly.instantiate() and WebAssembly.instantiateStreaming() global stat...

The assign() method for <slot> elements assigns nodes to the slot, as an alterna...

The Web Audio API creates graphs of audio nodes that handle sound inputs, synthe...

The OfflineAudioContext API represents an audio processing graph that writes to ...

The AudioWorklet API runs module code in a separate thread, specifically for non...

View transitions allow you to create animated visual transitions between differe...

The view-transition-class CSS property sets a name that can be used to apply sty...

The @view-transition CSS rule sets whether a document opts-in to transitions bet...

The :active-view-transition CSS pseudo-class matches the root element when a vie...

The ::target-text pseudo-element allows you to style text highlighted by a URL t...

Text fragments are URL fragments on the form #:~:text=snippet and link to a snip...

The <filter> SVG element applies custom effects such as color manipulation, blur...

The SVG image format, represented by the <svg> element, creates two-dimensional ...

The fill-opacity, and stroke-opacity SVG attributes and CSS properties control t...

The context-fill and context-stroke CSS values are used with fill and stroke in ...

The cancel() method of a TransformStream transformer cleans up resources when th...

Streams are transferable objects, which can be moved between contexts such as wi...

The streams API creates, composes, and consumes continuously generated data.

The ReadableStream.from() static method converts an iterable or async iterable o...

A ReadableStream constructed with { type: "bytes" } reads bytes from a stream wi...

Asynchronous iteration of a stream allows you to use for await … of loops to ite...

The navigator.storage API provides information about the availability and persis...

The navigator.storageBuckets API allows you to organize locally stored data into...

The document.requestStorageAccess() method allows content in iframes to request ...

The sharedStorage API stores data to a shared space where the data can then be p...

Non-cookie storage access extends the requestStorageAccess() API to let content ...

The localStorage and sessionStorage APIs store data as key-value pairs. While lo...

The SpeechSynthesis API converts text to speech with artificial voices.

The SpeechRecognition.grammars property of the Web Speech API represents a set o...

The SpeechRecognition API converts audio into text using the device's speech rec...

The speak-as CSS property sets how any element's content is spoken. Not to be co...

The speak CSS property sets whether or not text should be spoken.

The CreateVirtualSensor WebDriver command creates a virtual sensor for testing a...

The AbsoluteOrientationSensor and RelativeOrientationSensor APIs describe the ph...

The Magnetometer API reads magnetic field sensor data from the device's magnetom...

The Gyroscope API reads the angular velocity of a device in three dimensions.

The DeviceMotion and DeviceOrientation events report the movement and orientatio...

The AmbientLightSensor API returns the current light level in lux of the ambient...

The Accelerometer, LinearAccelerationSensor and GravitySensor APIs read the acce...

The Selection API controls and modifies user text selections within the page.

The window.getSelection().getComposedRanges() method returns ranges that represe...

The Web Cryptography API performs low-level cryptographic operations, such as en...

The navigator.userActivation API reveals whether the user has interacted with th...

The Upgrade-Insecure-Requests HTTP request header tells the server that the resp...

Trusted types allow you to lock down insecure parts of the DOM API and prevent c...

The navigator.permissions API checks whether a permission, such as access to geo...

When a document is loaded over HTTPS, browsers ensure that none of the document'...

The credentialless attribute for the <iframe> HTML element loads third-party con...

The Strict-Transport-Security HTTP response header informs browsers that the sit...

Content Security Policy (CSP) helps to mitigate certain security threats, includ...

Cross-Origin Resource Sharing is an HTTP-header based mechanism that allows a se...

The scrollend event fires when an element or document has finished scrolling.

The scrollbar-width CSS property sets the width of the scrollbar.

The scrollbar-gutter CSS property reserves space for the scrollbar, preventing u...

The scrollbar-color CSS property sets the color of the scrollbar track and thumb...

The scrollsnapchanging and scrollsnapchange events fire when a scroll gesture ch...

CSS scroll snap controls the panning and scrolling behavior within a scroll cont...

A scroll container can be navigated by activating ::scroll-marker pseudo-element...

The scrollIntoView() method scrolls an element's ancestor containers such that t...

The animation-timeline, scroll-timeline, and view-timeline CSS properties advanc...

The ::scroll-button(<dir>) CSS pseudo-element is a focusable button which scroll...

The scroll-behavior CSS property controls whether scrolling is smooth or snaps, ...

The overscroll-behavior CSS property disables default scrolling behaviors when t...

The overflow-anchor CSS property sets an element as a possible scroll anchor, re...

The ruby-position CSS property sets the position of a ruby annotation in relatio...

The ruby-overhang CSS property sets whether ruby annotations may overlap adjacen...

The ruby-align CSS property sets the spacing and alignment of ruby annotation te...

The display_override:\ ["window-controls-overlay"] web application manifest memb...

The name="application-title" attribute for the <meta> HTML element sets an insta...

A web app manifest file provides metadata about the site. The browser can use th...

The beforeinstallprompt event fires when a Progressive Web App (PWA) is installa...

The shortcuts web app manifest member registers common actions of an installed w...

The share_target web app manifest member registers an installed web app as a han...

The protocol_handlers web app manifest member registers an installed web app as ...

The launch_handler web app manifest member, with the client_mode property, confi...

The file_handlers web app manifest member registers an installed web app as a ha...

An alternative to @media print queries, the beforeprint and afterprint events al...

The print-color-adjust CSS property sets whether styles of printed pages should ...

The window.print() method opens the browser's print dialog.

The color-adjust shorthand CSS property allows multiple performance related colo...

The serverTiming property of the PerformanceResourceTiming API contains server t...

PerformanceResourceTiming entries report when network events happen while loadin...

The decodedBodySize, encodedBodySize, and transferSize properties of the Perform...

The window.performance.timing and window.performance.navigation APIs report perf...

The performance global object and the PerformanceObserver API provide access to ...

The paint performance entry and the PerformancePaintTiming API measures the dura...

The visibility-state performance entry and the VisibilityStateEntry API measure ...

The navigation performance entry and the PerformanceNavigationTiming API measure...

The measureUserAgentSpecificMemory() method estimates the memory usage of a web ...

The longtask performance event type and the PerformanceLongTaskTiming API provid...

The long-animation-frame performance event type and the PerformanceLongAnimation...

The layout-shift performance entry and LayoutShift API measures the layout stabi...

The largest-contentful-paint performance entry and the LargestContentfulPaint AP...

The event and first-input performance entries and the PerformanceEventTiming API...

The element performance entry and the PerformanceElementTiming API measures the ...

The notRestoredReasons property of a PerformanceNavigationTiming object explains...

The payment extension of a web authentication credential allows a relying party ...

The PaymentRequest API prompts the user to make a payment through the browser's ...

The payment handler API registers a web application as a payment handler and res...

The XMLSerializer API provides the serializeToString() method to construct an XM...

The DOMParser API parses XML or HTML source code from a string into a DOM Docume...

The EventSource API creates a connection to a server and listens to a stream of ...

The postMessage() global method sends cross-origin messages to windows and worke...

The messageerror event fires on a target, such as a window or worker, when an in...

Channel messaging communicates one-to-one between browsing contexts on the same ...

The BroadcastChannel API allows you to send messages between same-origin browsin...

The Worker() constructor accepts { type: "module" } to load scripts that use imp...

The SharedWorker() constructor accepts { type: "module" } to load scripts that u...

The navigator.serviceWorker.register() method accepts { type: "module" } to load...

JavaScript modules allow code to be organized into reusable units. Modules use i...

The with JavaScript statement adds a given object to the chain of scopes used to...

The WeakRef and FinalizationRegistry objects hold references to garbage-collecta...

Unicode point escapes (\\u{}) represent Unicode characters within strings.

The await keyword, when used at the top level of a module (outside of an async f...

The Temporal API allows you to work with dates, times, time zones, and durations...

Template literals are literals delimited with backtick (`) characters, allowing ...

The spread (...) syntax allows an iterable, such as an array or string, to be ex...

The SharedArrayBuffer object represents bytes shared between multiple workers an...

The Proxy and Reflect JavaScript built-ins intercept and define custom behavior ...

Omit the the binding parameter of a catch clause when you don't need information...

To improve readability for numeric literals, underscores (_) can be used as sepa...

The nullish coalescing (??) and nullish coalescing assignment (??=) operators re...

The Math.sumPrecise() static method returns the sum of an iterable of numbers. I...

The logical AND assignment (&&=) and the logical OR assignment (||=) operators s...

The let and const declarations define block-scoped variables.

JavaScript is a programming language that runs in browsers, usually through the ...

JavaScript built-in methods such as, String.bold() and String.italics(), wrap st...

The #! comment at the absolute start of a script or module is treated as a norma...

The globalThis property accesses the global this value (and hence the global obj...

Generator functions (function*) create iterators that return multiple values, on...

The caller and arguments properties of a non-strict mode Function object are the...

Functions are series of statements that can be called and return a value. The fu...

The exponentiation (**) operator returns the result of raising the first operand...

The escape() and unescape() built-in Javascript methods encode and unencode stri...

The destructuring assignment syntax is a JavaScript expression that unpacks valu...

The getYear() and setYear() methods of Date objects get and set the year as an o...

Classes are an object-oriented syntax for JavaScript prototypes.

The BigInt64Array and BigUint64Array typed arrays represent 64-bit integers, sig...

The BigInt JavaScript type represents integers of any size, including integers t...

The Atomics.waitAsync() static method waits for a value in a shared memory locat...

Async generator functions (async function*) create iterators that return multipl...

The async and await keywords allow you to use the asynchronous, promise-based be...

The callee property of the arguments variable in a non-strict function body's lo...

The Promise.withResolvers() static method is an alternative to the Promise() con...

The Promise.try() static method returns a promise that takes a callback of any k...

The promise finally() method executes a function when the promise settles (resol...

The Promise.any() static method returns a promise that fulfills as soon as the f...

The Promise.allSettled() static method waits for an array of promises to settle ...

A promise represents an asynchronous operation which eventually succeeds or fail...

A Symbol value is a unique, non-enumerable primitive value used for encapsulatio...

The string type (and String object) represents a sequence of characters.

The number type (and Number object) represents floating-point numbers, such as 4...

The Date object represents a single moment in time.

The isWellFormed() method of strings returns a boolean indicating if the string ...

The trimStart() and trimEnd() methods of strings return a new string with whites...

The startsWith() and endsWith() methods of strings returns whether a search stri...

The replaceAll() method of strings returns a new string where all matches of a p...

The repeat() method of strings returns the original string repeated a number of ...

The String.raw() static method interpolates template literal substitutions, but ...

The padStart() and padEnd() methods of strings return a string lengthened to a m...

The normalize() method of strings returns a Unicode normal form of a string as a...

The matchAll() method of strings matches a string against a regular expression a...

The includes() method of strings returns whether a search string appears within ...

The codePointAt() method returns the numeric value of the UTF-16 code point at a...

The at() method of strings returns the character (one UTF-16 code unit) at an in...

To serialize and parse JSON in a lossless way, JSON.stringify() handles rawJSON ...

Module import … with { type: "json" } statements load JSON data. Also known as J...

The JSON API provides static methods for parsing values from and converting valu...

Typed arrays are iterable with the for … of statement and enumerable with the me...

The for...of loop operates on a sequence of values sourced from an iterable obje...

The Iterator object is an abstract base for objects that implement the iterator ...

Asynchronous iterator objects, such as those returned by promises or generator f...

The Intl.Segmenter API creates a locale-aware text splitter that can separate a ...

The Intl.RelativeTimeFormat API creates a locale-aware formatter that turns an o...

The Intl.PluralRules API creates a locale-aware object that tells you which of t...

The getter methods of the Intl.Locale API provide supplemental information about...

The Intl.Locale API parses Unicode locale identifiers, with language, region, an...

The Intl.ListFormat API creates a locale-aware formatter that turns iterable obj...

The Intl.DurationFormat API creates a locale-aware formatter that turns an objec...

The Intl.DisplayNames API provides localized names of language, region, script, ...

The Intl API provides language sensitive string comparison, number formatting, d...

A WeakSet object stores unique values of any type without creating strong refere...

A WeakMap object holds key-value pairs that do not create strong references to i...

The Uint8Array object methods fromBase64(), toBase64(), and setFromBase64() conv...

Typed arrays are ordered lists of JavaScript values, where all values are of the...

Typed array iteration methods

Float16Array is a typed array of 16-bit floating point numbers.

The difference(), intersection(), isDisjointFrom(), isSubsetOf(), isSupersetOf()...

Set objects store unique values of any type.

Map objects hold key-value pairs and remember the original insertion order of th...

The Object.groupBy() and Map.groupBy() static methods group values of arrays and...

Stable array sort() function

The array splice() method changes an array in-place. You can use it to delete it...

The Array.of() and typed array .of() static methods create new arrays from the v...

Arrays are iterable with the for … of statement and enumerable with the methods ...

Array iteration methods

The Array.isArray() static method checks whether a value is an array.

The includes() method of arrays and typed arrays returns whether a given value a...

The Array.fromAsync() static method copies items from an async iterable object t...

The Array.from() and typed array .from() static methods copy items from an itera...

The flat() and flatMap() methods for arrays creates a new array such that each n...

The findLast() and findLastIndex() methods of arrays and typed arrays search an ...

The find() and findIndex() methods of arrays and typed arrays search an array fo...

The fill() method of arrays and typed arrays sets all or some items of an array ...

The copyWithin() method of arrays and typed arrays shifts or copies items of an ...

The toReversed(), toSorted(), toSpliced(), and with() methods of arrays and type...

The at() method of arrays and typed arrays returns the item at an index, includi...

Arrays are ordered lists of JavaScript values.

The sizes="auto" attribute for the <img> HTML element reserves layout space for ...

The image-orientation CSS property corrects the rotation of an image using the i...

The image() CSS function creates an image similar to url() but with additional f...

The cross-fade() CSS function generates an image by mixing two images.

The image-rendering: smooth CSS declaration scales images while retaining a grad...

The image-rendering CSS property sets how images are scaled, retaining smoothnes...

The image-rendering: crisp-edges CSS declaration scales images to preserve lines...

The tabindex HTML attribute make an element focusable, and sets the element's re...

The srcset and sizes attributes for <img> elements set a list of possible source...

The <ruby> element produces small annotations that are rendered with its base te...

The popover="hint" global HTML attribute creates a popover that is subordinate t...

The popover HTML attribute creates an overlay to display content on top of other...

The name="theme-color" attribute for the <meta> HTML element sets the preferred ...

The inert HTML attribute marks an element and its descendants as non-interactive...

The capture HTML attribute for <input type="file"> elements allows the user to c...

The hidden="until-found" attribute hides an element until it is found using the ...

The <dl>, <dt>, and <dd> HTML elements represent a list of terms and their assoc...

The shadowrootmode attribute on <template> creates a shadow root without the use...

The blocking="render" attribute for <link>, <script>, and <style> elements block...

The <video> element plays videos or movies, optionally with controls provided by...

The <track> element is used as a child of the media elements that lets you speci...

The <source> element sets a media resource for the <picture>, <video>, and <audi...

The requestVideoFrameCallback() method for <video> schedules a function that run...

The preservesPitch property for <audio> or <video> adjusts the pitch of audio to...

The :playing, :paused, :seeking, :buffering, :stalled, :muted, and :volume-locke...

The fastSeek() method seeks an <audio> or <video> element as fast as possible, b...

The controlslist attribute for <audio> or <video> hides parts of the browser's b...

The captureStream() method for <audio> and <video> elements returns a MediaStrea...

The audioTracks and videoTracks APIs for media elements switch audio and video t...

The <audio> element plays sound such as audio effects or music, optionally with ...

The <wbr> HTML element represents a word break opportunity, to explicitly mark a...

The <var> element represents the name of a variable in a mathematical expression...

The <u> HTML element makes non-textual annotations, styling text as underlined b...

The <title> element sets the title of the document and exposes it to users via t...

The <time> HTML element represents a time, such as a calendar date, clock time, ...

The <template> HTML element holds HTML fragments which you can clone and insert ...

Attributes and properties of table elements, such as align, vAlign, noWrap, bgco...

The <table> HTML element, with several related elements, represents tabular data...

The <sub> and <sup> elements sets inline text to be displayed as subscript or su...

The <style> element embeds an inline CSS stylesheet in a document.

The <strong> HTML element brings attention to the content, styling text as bold ...

The <span> HTML element is the generic inline container for content.

The <small> element represents side-comments and small print, like copyright and...

The <slot> HTML element is a placeholder inside a web component where consumers ...

The <section> element is a generic standalone section of a document, which doesn...

The <search> HTML element is a container that represents the parts of the web pa...

The <script> element contains or loads data or executable code. This is typicall...

The <samp> element represents a sample or quoted output from a computer program....

The <s> HTML element indicates text that is no longer relevant or accurate, styl...

The requestClose() method of a <dialog> HTML element closes the dialog, firing a...

The <q> element represents a short inline quotation.

The <pre> element represents a block element of preformatted text that is presen...

The <picture> element is used for art direction in responsive images, where a di...

The <p> element represents a paragraph of text.

The <object> element represents an external resource such as a PDF or SVG docume...

The <nav> element represents a section of a page whose purpose is to provide nav...

The <meta> element represents metadata about the page used by the browser or sea...

The <menu> element represents an unordered list of action items (<li>), such as ...

The <mark> element represents text which is marked or highlighted for reference ...

The <main> element represents the dominant content of a document. It is commonly...

The <ol>, <ul>, and <li> HTML elements represent ordered and unordered lists.

The <link> element creates a relationship between the current document and an ex...

The <kbd> element represents textual user input, such as keyboard or voice input...

The <ins> element element represents a range of text that has been inserted into...

The <img> element adds an image into the document.

The <area> and <map> elements define a clickable area on an image.

The <iframe> element embeds another HTML page into the current page.

The <i> HTML element identifies idiomatic content, styling text as italic by def...

The <html> element represents the top-level of an HTML document and is referred ...

The <hr> element represents a thematic break between paragraphs, often shown as ...

The <hgroup> element represents a heading and related content.

The <h1> through <h6> HTML elements represent six levels of section headings, in...

The <header> and <footer> HTML elements represent content that precedes and foll...

The <head> element contains machine-readable information (metadata) about the do...

The <figure> and <figcaption> HTML elements represent an illustration, diagram, ...

The <embed> element represents an external resource such as a PDF or SVG documen...

The <em> HTML element emphasizes or stresses the content, styling text as italic...

The <div> HTML element is the generic container for content.

The closedby HTML attribute for <dialog> sets which user actions close a dialog....

The <dialog> HTML element represents a modal or non-modal dialog box, such as a ...

The <dfn> element marks a term to be defined, styling text as italic by default.

Multiple <details> elements which use the same name attribute are mutually exclu...

The <details> element is a disclosure widget which can be expanded to reveal add...

The <del> element element represents a range of text that has been deleted from ...

The <data> element links a given piece of content with a machine-readable transl...

The console API logs debugging messages to the browser development tools' consol...

The <code> element displays its contents as a fragment of computer code.

The <cite> element represents the title of a quoted, referenced, or mentioned cr...

The <br> element produces line breaks in text.

The <body> element represents the content of an HTML document.

The <blockquote> element represents an extended quotation, styling contents as a...

The <bdo> element overrides the directionality of text, so that the text within ...

The <bdi> element isolates text that may have a different text direction from it...

The <base> element sets the base URL (the URL that relative URLs are relative to...

The <b> HTML element draws reader's attention to text, styling text as bold by d...

The <aside> element represents a portion of a document whose content is only ind...

The <article> element represents self-contained content, which is intended to be...

The <address> element represents contact information for a person or people, or ...

The <abbr> HTML element represents an abbreviation or acronym.

The <a> element creates a hyperlink to any resource that's accessible via a URL,...

The writingsuggestions HTML attribute turns on or off a browser's writing sugges...

The <textarea> element represents an editing control that allows users to enter ...

The showPicker() method for <select> elements shows the dropdown menu or other u...

The showPicker() method for <input> elements shows the user interface for pickin...

The <select> element provides a menu of options for a user to pick from, typical...

The <input type="search"> HTML element represents a text field for search querie...

The :read-only and :read-write CSS pseudo-classes match elements that are read-o...

The <progress> element displays an indicator showing the completion progress of ...

The <output> element represents the result of a calculation, user action, or for...

The <meter> element represents a scalar value within a known range or a fraction...

The <label> HTML element represents a caption for a form field.

The <input type="submit"> HTML element represents a button that triggers an acti...

The :checked, :disabled, and :enabled CSS pseudo-classes match form elements bas...

The <input type="reset"> HTML element represents a button that sets all form fie...

The <input type="range"> element represents a slider for choosing an inexact val...

The <input type="radio"> HTML element represents one button in a group such that...

The <input type="password"> HTML element represents a field for users to enter a...

The <input type="number"> HTML element represents numeric input data.

The <input type="image"> HTML element is an image that can be used to submit a f...

The <input type="hidden"> HTML element represents a form field that is not shown...

The <input type="file"> HTML element shows a file picker from which users can ch...

The <input type="email">, <input type="tel">, and <input type="url"> HTML elemen...

The <input type="date"> and <input type="time"> HTML elements show date and time...

The ability to control the opacity of a color picked using <input type="color"> ...

The <input type="color"> HTML element shows a color picker from which users can ...

The <input type="checkbox"> HTML element represents a tickable box with two stat...

The <input type="button"> HTML element represents a button that triggers some ac...

The <input type="text"> HTML element allows the user to enter information into a...

The :indeterminate CSS pseudo-class selects any form element whose state is inde...

The <form> element contains interactive controls for submitting information.

The <fieldset> and <legend> elements group several form control elements within ...

The <datalist> element sets recommended values for an <input> element. Browsers ...

The <select> element's appearance, including the button, selected option, picker...

Methods that validate form controls before submission, such as checkValidity(), ...

The <button> HTML element represents a button that triggers some action, such as...

The :autofill pseudo-class matches <input> elements that have been filled in aut...

The :state() CSS pseudo-class matches custom elements based on their custom stat...

The CustomElementRegistry() constructor creates a new custom element registry th...

Custom elements may act like built-in form elements, via the the attachInternals...

Customized built-in elements are HTML elements that extend built-in elements usi...

Autonomous custom elements are HTML elements with a hyphenated tag name (like <e...

The hand and pose properties of a Gamepad object represent the position in space...

The touched property of a GamepadButton object indicates whether a button capabl...

The gamepad.vibrationActuator property represents a gamepad's haptics hardware, ...

The navigator.getGamepads() API accesses and responds to signals from game contr...

The navigator.storage.getDirectory() method returns a FileSystemDirectoryHandle ...

The showOpenFilePicker(), showDirectoryPicker(), and showSaveFilePicker() method...

Shadow DOM allows you to attach encapsulated "shadow" DOM trees to elements. A s...

The MutationObserver API watches for changes to the DOM tree and calls a callbac...

Mutation events like DOMSubtreeModified, DOMNodeInserted, or DOMNodeRemoved fire...

The moveBefore() DOM method relocates a node while preserving its state. For exa...

The getHTML() method of Element and ShadowRoot objects serializes an element's D...

The DOM (Document Object Model) API represents HTML and XML documents as trees o...

The z-index CSS property orders overlapping elements, with higher values appeari...

The lr, lr-tb, rl, rl-tb, tb, and tb-rl keyword values for the writing-mode CSS ...

The writing-mode CSS property sets whether text is laid out horizontally or vert...

The word-break: break-word CSS declaration sets word breaks to occur according t...

The will-change CSS property gives hints to the browser about expected changes t...

The visibility CSS property sets whether an element is shown. Invisible elements...

The writing-mode CSS property orients form elements (such as radio buttons, prog...

The vertical-align CSS property sets the vertical alignment of inline, inline-bl...

The user-select CSS property controls which elements can be selected by the user...

The display CSS property accepts multiple keyword values, such as inline flex or...

The sin(), cos(), tan(), asin(), acos(), atan(), and atan2() CSS functions compu...

The -webkit-text-stroke-width and -webkit-text-stroke-color CSS properties set t...

The text-spacing-trim CSS property controls spacing around CJK characters, avoid...

The text-overflow CSS property sets how hidden overflow content appears to users...

The text-indent CSS property sets the size of the empty space (indentation) at t...

The @supports at-rule applies styles based on a browser's support for CSS featur...

The style global HTML attribute applies inline CSS styling declarations to indiv...

The @starting-style CSS at-rule sets the starting values for properties that are...

The sibling-count() and sibling-index() CSS functions return integers that are u...

The @scope CSS at-rule sets the scope for a group of rules.

The round(), mod(), and rem() CSS functions compute rounded values and the remai...

The resize CSS property sets whether an element can be resized by the user, and ...

The from keyword for color functions (color(), hsl(), oklch(), etc.) creates a n...

The reading-flow CSS property sets the order in which flex or grid elements are ...

The quotes CSS property sets the quotation marks inserted via the content CSS pr...

The pointer-events CSS property sets whether a user can interact with an element...

The physical CSS properties, top, right, bottom, and left, set the inset positio...

The paint-order CSS property sets the z-order of strokes, fills, and (in SVG con...

The paint() CSS function creates a custom image, drawn using a paint worklet, fo...

The overlay CSS property, used as an allow-discrete CSS transition, prevents a t...

The overflow CSS property sets the behavior for when content doesn't fit in an e...

The overflow: overlay CSS declaration is an alias to overflow: auto. Historicall...

The overflow-clip-margin CSS property sets how far overflow content may appear o...

The overflow: clip CSS declaration clips an element's overflowing content to the...

The opacity CSS property sets the transparency of an element.

The object-view-box CSS property crops and zooms to an inset area of an image.

CSS nesting allows for shorter selectors, easier reading, and more modularity by...

The @namespace CSS rule sets a default namespace or namespace prefix. Namespace ...

The offset CSS property animates an element along a defined motion path.

The min() and max() CSS functions return the minimum or maximum of the arguments...

The margin-trim CSS property removes the margins of child elements when they mee...

CSS logical properties control borders, size, margin, and padding with direction...

The linear() easing function for animations and transitions interpolates linearl...

The line-clamp CSS property limits the text in a block container to a certain nu...

The light-dark() CSS function accepts two colors and uses one depending on the c...

The unicode-bidi and direction CSS properties override the Unicode layout algori...

The initial-letter CSS property sets the number of lines the first letter of an ...

The @import CSS at-rule loads styles from another stylesheet.

The ime-mode CSS property sets the state of the input method editor for text fie...

The image-set() CSS function provides a set of images at different resolutions o...

The if() CSS function is an inline conditional value that returns a value based ...

The hyphens CSS property controls when long words are broken by line wrapping. A...

The glyph-orientation-vertical CSS property sets the orientation of glyphs in te...

The @function CSS at-rule defines a custom function that takes CSS values or cus...

The forced-colors CSS @media rule detects when a user has chosen to use a forced...

The float CSS property aligns an element to either side of its container, allowi...

The filter CSS property applies one or more graphic effects to an element. You c...

The field-sizing CSS property allows form controls such as <textarea> to be size...

The pow(), sqrt(), hypot(), log(), and exp() CSS functions compute various expon...

The display: table CSS declaration renders an element with the box layout of a <...

The display: ruby CSS declaration renders an element with the box layout of a <r...

The display: list-item CSS declaration renders an element with the box layout of...

The display: flow-root CSS declaration sets an element as the root element of a ...

The display: contents CSS declaration sets an element to display only its conten...

You can animate elements between display: none and any other display value or an...

The display CSS property sets the display behavior of an element's box within it...

Custom properties are CSS properties prefixed with -- that set values you can re...

The cursor CSS property styles the pointer, allowing you to provide hints to the...

The CSS.supports() static method returns whether the browser supports a CSS decl...

Module import … with { type: "css" } statements load CSS modules as constructabl...

The content-visibility CSS property delays rendering an element, including layou...

The content CSS property sets the content inside of an element or pseudo-element...

The color-scheme CSS property sets which color schemes (light or dark) an elemen...

The color-mix() function mixes two colors in a given color space and by a given ...

The color CSS property sets the primary foreground color of an element, which is...

The @charset CSS at-rule specifies the character encoding of an external style s...

The @layer CSS at-rule avoids specificity conflicts by providing priority levels...

The caret-color CSS property sets the color of the text insertion pointer in a t...

The calc-size() CSS function computes mathematical expressions that include heig...

The e, pi, infinity, and NaN keywords represent well-defined constants accepted ...

The calc() CSS function computes mathematical expressions such a calc(100%/3 - 1...

The backdrop-filter CSS property applies graphical effects such as blurring or c...

The attr() CSS function, in content property declarations, sets a ::before or ::...

The attr() CSS function, in the context of any property, returns the value of an...

The aspect-ratio CSS property controls the width-to-height ratio of elements. Fo...

The appearance CSS property controls the appearance of form controls. Using appe...

The rel="alternate stylesheet" attribute for the <link> HTML element offers an a...

The / notation in content CSS property values adds alternative text to generated...

The accent-color CSS property sets a color for checkboxes, radio buttons, and ot...

The abs() and sign() CSS functions compute the absolute value or the sign of the...

The white-space-collapse CSS property sets whether new line characters are shown...

The white-space CSS property sets how white space is collapsed and how lines wra...

The text-wrap-mode CSS property sets whether lines may wrap with the values wrap...

The tab-size CSS property sets the width of the tab character.

The vw, vh, vmin, and vmax CSS viewport units are relative to the size of the vi...

The rlh CSS length unit is a font-relative length relative to the line height of...

The ric CSS length unit, or root international character, is a font-relative len...

The rex CSS length unit is a font-relative length that is equal to the x-height ...

The rem CSS length unit is a font-relative length that is equal to the font size...

The rch CSS length unit is a font-relative length equal to the value of the ch u...

The rcap CSS length unit is a font-relative length equal to the value of the cap...

The Q CSS length unit is an absolute length anchored to the physical measurement...

The lh CSS length unit corresponds to the requested line height, the computed va...

The ic CSS length unit corresponds to the width of CJK ideographic characters.

The ex CSS length unit is a font-relative length equal to the used x-height of t...

The em CSS length unit is a font-relative length equal to the specified font siz...

The ch CSS length unit is a font-relative length based on the width of the zero ...

The cap CSS length unit corresponds to the height of Latin capital letters.

The transition shorthand CSS property sets how changes to an element's styles ma...

The transition-behavior: allow-discrete CSS declaration allows transitions for p...

The interpolate-size CSS property sets whether animations and transitions interp...

The transform CSS property and its 3D transform functions allow rotations and ot...

The transform CSS property and its 2D transform functions allow rotating, scalin...

The translate, rotate, and scale CSS properties apply single transformations ind...

The word-spacing CSS property sets the amount of white space between words.

The text-underline-position CSS property sets the position of underlines on text...

The text-underline-offset CSS property shifts underlines on text from the initia...

The text-transform CSS property sets text case and capitalization.

The text-shadow CSS property sets the position and styles of shadow on text.

The text-orientation CSS property sets the how text is typeset within a line whe...

The text-justify CSS property sets the justification method of text when text-al...

The text-indent: hanging CSS declaration indents all lines except the first.

The text-indent: each-line CSS declaration indents text after forced breaks as w...

The text-combine-upright CSS property displays multiple characters in the space ...

The text-box CSS property sets the spacing above and below text based on a font'...

The text-align-last CSS property sets the alignment of the last line of text bef...

The text-align CSS property sets the horizontal placement of the inner content o...