The <input type="month"> HTML element shows a month picker.
Web platform features
The random() CSS function chooses a random numeric value within a specified range. This allows for dynamic, randomized styling using CSS.
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 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 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.
The <select> element's appearance, including the button, selected option, picker dropdown, and options, can be customized using CSS.
The BarcodeDetector API recognizes various barcode formats in images.
#8
The Web MIDI API enables selecting MIDI input and output devices and sending and receiving MIDI messages.
The @custom-media CSS at-rule names a media query, which you can reuse in multiple @media rules.
The ::selection CSS pseudo-element selects text a user has highlighted.
#11
The JPEG XL image format is a raster graphics file format that supports animation, alpha transparency, and lossy as well as lossless compression.
The scroll-initial-target: nearest CSS declaration sets the initial scroll position of its scroll container to the top of the element, much like scrolling to a URL fragment.
The anchor() and anchor-size() CSS functions animate or transition on changes such as the anchor box moving or the anchor element changing.
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 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 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 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 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 navigator.gpu API performs operations such as rendering and computation on dedicated graphics hardware (also known as a Graphics Processing Unit).
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.
#24
The beforeunload event is fired when the current window is about to be unloaded. Typically this is used to display a dialog to confirm if users really want to leave the page when there is unsaved data that would be lost.