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.
Web platform features
The JPEG XL image format is a raster graphics file format that supports animation, alpha transparency, and lossy as well as lossless compression.
The <input type="month"> HTML element shows a month picker.
The random() CSS function chooses a random numeric value within a specified range. This allows for dynamic, randomized styling using CSS.
The 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 line-clamp CSS property limits the text in a block container to a certain number of lines. The prefixed -webkit-line-clamp is widely supported but only works with -webkit-box-orient: vertical in combination with display: -webkit-box or display: -webkit-inline-box.
The BarcodeDetector API recognizes various barcode formats in images.
The navigator.mediaDevices.getDisplayMedia() method asks the user to choose a screen or portion of a screen (such as a window) to capture as a media stream.
The reading-flow CSS property sets the order in which flex or grid elements are rendered to speech or reached via focus navigation. The reading-order property overrides this order.
#10
Background fetch downloads data in the background even when the web page is closed.
The signalUnknownCredential(), signalAllAcceptedCredentials(), and signalCurrentUserDetails() methods of PublicKeyCredential inform authenticators of the state of public key credentials, so that incorrect or revoked credentials may be updated, removed, or hidden.
The <select> element's appearance, including the button, selected option, picker dropdown, and options, can be customized using CSS.
The Temporal API allows you to work with dates, times, time zones, and durations. It is more powerful than the Date API.
The frame-sizing CSS property sets the size of an <iframe> element to that of it contents, to avoid scrolling in the iframe. Embedded documents allow this with the <meta name="responsive-embedded-sizing"> element and request resizing in the embedding page by calling window.requestResize().
The corner-shape CSS property sets the shape of an element's corners when using border-radius, allowing for shapes other than rounded corners. For example, corner-shape: squircle is a shape in between a square and rounded corner.
The interpolate-size CSS property sets whether animations and transitions interpolate between a numeric value and a keyword value, such as from a fixed length to auto or fit-content.
The link-parameters CSS property, param() modifier for the url() CSS function, and the #:~:param(…) URL fragment set custom CSS environment variables on an external resource, such as an SVG image, allowing the external resource to adapt its presentation based on the variables.
The <input type="week"> HTML element shows a week picker.
The if() CSS function is an inline conditional value that returns a value based on a set of conditions.
The @function CSS at-rule defines a custom function that takes CSS values or custom properties as arguments, and returns a CSS value. It can be based on conditional logic such as by using the @media at-rule.
The Sanitizer API customizes the sanitization of HTML parsed and inserted into the DOM in a way that can prevent cross-site scripting attacks. You can use it with DOM APIs that accept a sanitizer option, such as parseHTML() or setHTML().
The navigator.gpu API performs operations such as rendering and computation on dedicated graphics hardware (also known as a Graphics Processing Unit).
The calc-size() CSS function computes mathematical expressions that include height and width keyword values, for example calc-size(fit-content, size / 2). Not to be confused with the calc() CSS function, which cannot use keyword values.
Colors in CSS and <canvas> elements can be defined out of range of an output device or the color space of the canvas. Gamut mapping brings the color into range while preserving hue and lightness.
