The HTMLLinkElement interface represents reference information for external resources and the relationship of those resources to a document and vice versa (corresponds to <link> element; not to be confu…

The appearance CSS property specifies the rendered appearance of replaced UI widget elements such as form controls. Most commonly, such elements are given native, platform…

The length accessor property of TypedArray instances returns the length (in elements) of this typed array.

The pictureInPictureEnabled read-only property of the Document interface indicates whether or not picture-in-picture mode is available.

The read-only renderState property of an XRSession object indicates the returns a XRRenderState object describing how the user's environment which should be rendered. The informati…

This WebGL example provides a simple demonstration of procedural texturing with fragment shaders. That is, using code to generate textures for use in shading WebGL objects.

The mask CSS shorthand property hides an element (partially or fully) by masking or clipping a specified area of the image. It is a shorthand for all the mask-* properties. The proper…

The JavaScript exception "right-hand side of 'in' should be an object" occurs when the in operator was used to search in strings, or i…

The GPUSampler interface of the WebGPU API represents an object that can control how shaders transform and filter texture resource data.

The selectedIndex property of the ImageTrackList interface returns the index of the selected track.

The read-only XMLHttpRequest.responseURL property returns the serialized URL of the response or the empty string if the URL is null. If the URL is returned, any URL fragm…

The <feOffset> SVG filter primitive enables offsetting an input image relative to its current position. The input image as a whole is offset by the values specified in the dx and dy attribute…

The <time> CSS data type represents a time value expressed in seconds or milliseconds. It is used in animation, transition, and related properties.

The has() method of WeakSet instances returns a boolean indicating whether the specified value exists in this WeakSet or not.

A request to access cookies or storage was partitioned because it came from a third party (a different origin) and dynamic stat…

The reportValidity() method of the ElementInternals interface checks if the element meets any constraint validation rules applied to it.

The offset-path CSS property specifies a path for an element to follow and determines the element's positioning within the path's parent container or the SVG coordinate …

The maxlength attribute defines the maximum string length that the user can enter into an <input> or <textarea>. The attribute must have an integer value of 0 or higher.

The GPUBuffer interface of the WebGPU API represents a block of memory that can be used to store raw data to use in GPU operations.

The inputsourceschange event is sent to an XRSession when the set of available WebXR input devices changes.

The Generator object is returned by a generator function and it conforms to both the iterable protocol and the iterator protocol.

The convertToSpecifiedUnits() method of the SVGAngle interface allows you to convert the angle's value to the specified unit type.

Global attributes are attributes common to all MathML elements; they can be used on all elements, though they may have no effect on some elements.

The component read-only property of the RTCIceTransport interface specifies whether the object is serving to transport RTP or RTCP.

WebDriver classic is the original WebDriver protocol that provides HTTP-based commands for browser automation. This reference documents the commands and timeouts available in WebDriv…

The startsWith() method of String values determines whether this string begins with the characters of a specified string, returning true or fa…

The <line-width> enumerated value type represents the length or keyword value that defines the width of a line, or the lack of a line. The <line-width> keyword values are used i…

Returns the statusbar object.

The createGain() method of the BaseAudioContext interface creates a GainNode, which can be used to control the overall gain (or volume) of the audio graph.

The DOMPoint() constructor creates and returns a new DOMPoint object, given the values for some or all of its properties.

The Touch.identifier returns a value uniquely identifying this point of contact with the touch surface. This value remains consistent for every event involving this finger's (or stylus's) mo…

The name manifest member is used to specify the full name of your web application as it's usually displayed to users, such as in application lists or as a label for your application's icon…

The CanvasPattern interface represents an opaque object describing a pattern, based on an image, a canvas, or a video, created by the CanvasRenderingContext2D.createPattern() method.

The credentials read-only property of the Request interface reflects the value given to the Request() constructor in the credentials option. It determines whether or not the browser se…

The RTCErrorEvent interface of the WebRTC API represents an error event sent to a WebRTC object. It inherits from the standard Event interface, adding RTC-specific information describing the error.

Static initialization blocks are declared within a class. It contains statements to be evaluated during class initialization. This permits …

The referrerPolicy property of the HTMLImageElement interface defines which referrer is sent when fetching the resource. It reflects the <img> element's referre…

The documentPictureInPicture read-only property of the Window interface returns a reference to the DocumentPictureInPicture object for the current document cont…

The innerText property of the HTMLScriptElement interface represents the text content of the <script> element. It behaves in the same way as the textContent and text pr…

The appendItem() method of the SVGTransformList interface inserts a new item at the end of the list.

The section role, an abstract role, is a superclass role for renderable structural containment components.

The mapAsync() method of the GPUBuffer interface maps the specified range of the GPUBuffer. It returns a Promise that resolves when the GPUBuffer's content is ready to be accessed. While…

The font-variant-emoji CSS property specifies the default presentation style for displaying emojis.

The sizes property of the HTMLImageElement interface allows you to specify the layout width of the image for each of a list of media queries, or auto for lazy-loaded images to al…

The guide explains how to use the CSS writing-mode and direction properties to create and configure vertical form controls. This includes:

The pointerLockElement read-only property of the Document interface provides the element set as the target for mouse events while the pointer is locked. It is null if l…

The charAt() method of String values returns a new string consisting of the single UTF-16 code unit at the given index.

The getRGBColorValue() method of the CSSPrimitiveValue interface is used to get an RGB color value. If this CSS value doesn't contain a RGB color value, a DO…

This page lists tutorials to help learn how to develop PWAs. Tutorials walk through the steps of creating an app, from start to finish, explaining how the different features of the app are implemen…

The reading event is fired when a new reading is available on a sensor.