Limited Availability
30 featuresThe window.getScreenDetails() method gets information about the screens on a device, which you can use to place new windows on a specific screen with window.open().
The <datalist> element sets recommended values for an <input> element. Browsers may show a dropdown menu of all values or match values as the user types.
The launch_handler web app manifest member, with the client_mode property, configure how web app launches behave when an instance of the app is already open. For example, you can choose to focus the existing app instance instead of launching a new one.
The initial-letter CSS property sets the number of lines the first letter of an element occupies. You can use the property to make a raised capital or drop cap.
The credentialless attribute for the <iframe> HTML element loads third-party content in an ephemeral context and does not send any credentials such as cookies. When using cross-origin isolation, this allows you to embed content that does not send Cross-Origin-Embedder-Policy headers.
Speculation rules are hints to the browser to proactively download pages in the background so they appear instantly when the user navigates to them.
The Permissions-Policy response header and the allow attribute for <iframe> elements sets whether a policy-controlled feature, such as an API, may be used in a document.
The XRView.camera property provides direct access to pose-synchronized camera images within a WebXR session.
The EXT_texture_compression_bptc extension for WebGL 1.0 and 2.0 contexts adds the BPTC compressed texture formats to compressedTexImage2D() and compressedTexSubImage2D().
The fetch() method and Request() constructor accept a ReadableStream object as the request's body option, to stream upload data to the server.
The text-decoration CSS property in a ::selection rule sets the underline and other text decoration styles on the text a user has highlighted.
The display_override: ["window-controls-overlay"] web application manifest member shows content in the title bar area of a progressive web app that is installed on a desktop device.
The web prefix for ClipboardItem data types (also known as MIME types) allows reading and writing unsanitized custom data from the device clipboard.
The object-view-box CSS property crops and zooms to an inset area of an image.
When using navigator.mediaDevices.getDisplayMedia() to capture a browser tab as a video stream, the region capture API allows you to crop the video to the bounding box of a given element. In contrast to the element capture API, any content that overlays that element is also captured.
Streams are transferable objects, which can be moved between contexts such as windows and workers.
The DOMException, Error, EvalError, RangeError, ReferenceError, SyntaxError, TypeError, and URIError objects are serializable. You can call structuredClone() on an error object or pass it to a worker using postMessage().
The window.queryLocalFonts() method returns an array of locally-installed fonts, each represented by a FontData object.
The file_handlers web app manifest member registers an installed web app as a handler for files with specific file extensions or MIME types.
In columnar layouts (created by the columns or column-count CSS properties), the break-after, break-before, break-inside properties control where columns start or end.
The capture handle API allows you to share a custom handle (a string) from a web application being captured by getDisplayMedia() to the capturing web application.
The video-dynamic-range CSS media query sets styles based on whether a device can display video with at least standard range colors or at least high range colors. Non-visual devices will match neither.
The color-adjust shorthand CSS property allows multiple performance related color adjustments to be set at once. Setting the print-color-adjust CSS property directly is preferred, as it is the only such adjustment so far defined.
The attributionsourceid and attributiondestination attributes for <a> elements measure clicks across websites without associating a click to a specific session. Not to be confused with attribution reporting. Also known as PCM.
The background-attachment CSS property sets whether an element's background image or gradient moves as the element scrolls.