Stay up-to-date with the web platform
Use the Web platform features explorer to discover new features and APIs and stay up-to-date with changes.
Newly available across browsers (RSS feed)
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content-visibility:
The
content-visibilityCSS property delays rendering an element, including layout and painting, until it is needed. -
<link rel="dns-prefetch">:
The
rel="dns-prefetch"attribute for the<link>HTML element is a hint to the browser that the page or user is likely to request resources from another domain, so the browser should preemptively resolve DNS for thehrefvalue's domain. -
Unsanitized HTML parsing methods:
The
Document.parseHTMLUnsafe()static method parses HTML into a DOM tree, while thesetHTMLUnsafe()method ofElementandShadowRootparses and inserts HTML into an existing tree. No sanitization applies to these methods, so never call them with user-provided HTML strings. -
URLPattern:
The
URLPatternAPI creates patterns that can be matched against URLs or URL components. -
Uint8Array base64 and hex conversion:
The
Uint8Arrayobject methodsfromBase64(),toBase64(), andsetFromBase64()convert to and from base64 strings. ThefromHex(),toHex(), andsetFromHex()methods convert to and from hex strings.
Now widely available across browsers (RSS feed)
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Constructed stylesheets:
The
CSSStyleSheetconstructor creates a new stylesheet which can be shared between a document and multiple shadow roots usingadoptedStyleSheets. -
Container queries:
Container size queries with the
@containerat-rule apply styles to an element based on the dimensions of its container. -
Inline-size containment:
The
contain: inline-sizeCSS declaration prevents the element's inline dimension from being set by the element's contents. This permits the browser to avoid slower layout calculations. -
Array findLast() and findLastIndex():
The
findLast()andfindLastIndex()methods of arrays and typed arrays search an array in reverse order for the first item that satisfies a test function. -
Style containment:
The
contain: styleCSS declaration permits the browser to avoid slower layout calculations by preventing modification to counter (counter-incrementandcounter-set) and quotation styles (contentproperty quote values) beyond the element's descendants.