An XRAnchor object keeps track of a pose that is fixed relative to the real world. Anchors build an illusion that the placed objects are really present in the user's environment.

The related_applications web app manifest member lists operating system-specific applications that are related to the current web app, such as an Android app that provides similar functionality. The getInstalledRelatedApps() method lists which of those are installed on the current device.

A document's bgColor, fgColor, alinkColor, linkColor, and vlinkColor properties get and set the background, foreground, active link, link, and visited link colors of that document.

The capture HTML attribute for <input type="file"> elements allows the user to capture media using the device's camera or microphone.

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

The document.open(), document.write(), document.writeln(), and document.close() methods write content to a document, possibly while that document is still loading.

The document.execCommand() method reads and writes from the clipboard and performs editing commands on editable text, such as changing the font name or style. Related methods check whether commands are supported, enabled, or applied.

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

The Content Index API allows developers to register their offline enabled content with the browser.

A layout-shift performance entry measures the layout stability of web pages based on movements of the elements on the page. They're used to calculate cumulative layout shift (CLS), a common metric for perceived stability.

A DOM overlay shows 2D DOM content as an interactive, transparent layer on top of a WebXR application's WebGL content and camera image.

The BarcodeDetector API recognizes various barcode formats in images.

The getHitTestResults() method of an XRFrame object helps place objects in an augmented reality session by finding where cast rays intersect with real-world geometry.

The optional desynchronized parameter of a canvas's getContext() method permits the browser to draw a WebGL canvas independently of the event loop. This can reduce drawing latency.

The optional desynchronized parameter of a canvas's getContext() method permits the browser to draw a WebGL2 canvas independently of the event loop. This can reduce drawing latency.

The SVG 1.1 image format has several components that were excluded from SVG 2, such as fonts, alternate glyphs, and the xlink namespace.

The ui-serif, ui-sans-serif, ui-monospace and ui-rounded values for the font-family CSS property use device-default user interface fonts for text.

The periodic background synchronization API fires a recurring periodicsync event in a service worker. You can use this to update data in the background at regular intervals.

The navigator.contacts API allows you to ask users to share limited details about entries in their contact list with your application.

The optional alpha parameter of a 2D canvas's getContext() method sets whether the canvas has an alpha transparency channel. If set to false, then this permits the browser to optimize compositing for an opaque canvas.

The :host-context() CSS pseudo-class selects the containing element of the shadow tree in which it is used if that element or an ancestor matches the provided selector.

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

The background synchronization API registers a service worker callback to run only when the device is no longer offline. You can use this to let users continue using your app while offline and synchronize with a server after reconnecting.

The navigator.getBattery() API obtains information about the device's battery, including charge level and status. Also known as the Battery API.

Customized built-in elements are HTML elements that extend built-in elements using the is attribute, to add new behaviors that you define.

Deprecation reporting sends a report to a URL nominated by the Reporting-Endpoints header or the ReportingObserver API when a page uses a deprecated API or other browser feature.

An element performance entry measures the time to render elements that have the elementtiming attribute.

The Feature-Policy response header sets whether a policy-controlled feature, such as an API, may be used in a document. Not to be confused with permissions policy.

The FederatedCredential API represents the details required to authenticate a user using a third-party identity provider. Not to be confused with federated credential management (FedCM).

The gamepad attribute of an XRInputSource represents an XR input device, such as a motion controller, that reports data from physical inputs (such as buttons, touch pads, and triggers).