The y CSS property defines the y-axis coordinate of the top left corner of the SVG <rect> shape, <image> image, <foreignObject> viewport and nested <svg> viewport relative to the nearest <s…

The CSS animations module lets you animate the values of CSS properties, such as background-position and transform, over time by using keyframes. Each keyframe describes how the animated element s…

The getFloatTimeDomainData() method of the AnalyserNode Interface copies the current waveform, or time-domain, data into a Float32Array array passed into it…

The <rtc> HTML element embraces semantic annotations of characters presented in a ruby of <rb> elements used inside of <ruby> element. <rb> elements can have both pronu…

The end property of the CSSScopeRule interface returns a string containing the value of the @scope at-rule's scope limit.

The daysInYear accessor property of Temporal.PlainDateTime instances returns a positive integer representing the n…

Cookies Having Independent Partitioned State (CHIPS, also known as Partitioned cookies) allows developers to opt a cookie into partitioned st…

The FileSystemDirectoryEntry interface's method getDirectory() returns a FileSystemDirectoryEntry object corresponding to a directory contained somewhere …

The from read-only property of the NavigationTransition interface returns the NavigationHistoryEntry that the transition is coming from.

The <semantics> MathML element associates annotations with a MathML expression, for example its text source as a lightweight markup language or mathematical meaning expressed in a special XML…

The block-size CSS property defines the size of an element's block along the block axis. If the writing-mode is horizontal, it corresponds to the height; if the writing mo…

The IIRFilterNode interface of the Web Audio API is an AudioNode processor which implements a general infinite impulse response (IIR) filter; this type of filter can be used to implement tone control device…

The BluetoothRemoteGATTCharacteristic.value read-only property returns currently cached characteristic value. This value gets updated when the value of …

The Summarizer API provides an asynchronous (Promise-based) mechanism for a website to feed a body of text into the browser's own internal AI model and request that it returns a summary of…

The XRCylinderLayer interface of the WebXR Device API is a layer that takes up a curved rectangular space in the virtual environment. Only the front of the layer is visible.

The hreflang property of the SVGAElement interface returns a string indicating the language of the linked resource.

The images read-only property of the Document interface returns a collection of the images in the current HTML document.

The disconnect event of the RemotePlayback interface fires when the user agent disconnects from the remote device.

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…