Tag archive
Safari 27.2 adds the ::field-content pseudo-element, which styles a Customizable Select's displayed text without <selectedcontent>, tidies the base-select UA styles, and renames the Grid Lanes flow-tolerance property to fit-tolerance. WebKit recommends raising fit-tolerance significantly above its 1em default for better keyboard tabbing.
Safari 27.1 on the iPhone Duo includes a developer preview of the Device Posture API and the Viewport Segments API behind feature flags, adding device-posture and viewport-segments media queries plus viewport-segment-* env() variables.
Safari 27.1 Introduces Foldable-Aware Web Features for iPhone Duo, With New APIs for...
WebKit's October 22 preview adds support for <button> in the native appearance of <select> and the side attribute on SVG <textPath>, alongside fifteen line-clamp fixes and cascade corrections for font-family: initial and revert inside @starting-style.
WebKit's 8 October preview adds the interpolate-size property and the calc-size() function for working with intrinsic sizes, the size, min-size and max-size shorthands, border-*-radius side shorthands such as border-top-radius, symbols() and CSS linked parameters, alongside a long run of Grid, line-clamp and VoiceOver fixes.
WebKit's 23 September preview brings sibling-index() and sibling-count() into @container conditions, expands style-originated scroll timelines to match globally, exposes CSSContainerRule.conditions, corrects the ViewTimeline constructor to require a subject, and fixes a VoiceOver announcement bug around aria-keyshortcuts.
WebKit has released Safari 27.0 across iOS, iPadOS, macOS and visionOS with 83 web-platform features, including customizable <select>, scroll anchoring via overflow-anchor, and the <model> element beyond visionOS.
We're building Oh So Video, a set of video tools that run entirely in the browser: nothing is...
WebKit has implemented the interactive-widget viewport meta directive, giving pages a hand-authorable choice between resizing the visual viewport, resizing the layout viewport, or leaving both alone when a virtual keyboard appears.
WebKit engineer Kai Tamkun explains that Safari 27 replaces the old self-hosted JavaScript module loader with a C++ translation of the ECMAScript spec, closing an ordering bug that could make dynamic imports of a top-level-awaiting module finish out of sequence.
WebKit's 26 August preview adds an at-rule test to @supports, property-scoped caching on random(), the random-item(), ident() and inherit() functions, the corner-shape and object-view-box properties, comma-separated @container conditions, white-space-trim in the white-space shorthand, and HighlightRegistry.highlightsFromPoint().
My simulated tab scheduler priced a hibernated tab at 32 KB; real WebKit charges 39 MB. It claimed 7.9–11.5x less memory than an unmanaged browser and delivered 1.4–2.6x. That one number, wrong by three orders of magnitude, explains the entire gap.