#stp
Tagged “stp”
4 articlesSafari Technology Preview 254 lets WebKit animate to auto and trims the radius longhands
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.
Oct 9, 2026 · Iris CalderónBrowser releasesSafari Technology Preview 253 lets container queries branch on sibling-index() and frees style-originated scroll timelines
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.
Sep 24, 2026 · Yuki TanakaBrowser releasesSafari Technology Preview 252 adds @supports named-feature(), unprefixed user-select and two accessible-name fixes
WebKit's 11 September preview adds a named-feature() function to @supports, exposes CSSConditionRule.supports and CSSMediaRule.matches on the CSSOM, ships the unprefixed user-select property, allows percentage values in text-decoration-inset, and cleans up two accessible-name bugs around display: contents and list markers.
Sep 12, 2026 · Yuki TanakaBrowser releasesSafari Technology Preview 251 lands @supports at-rule(), random() with caching, corner-shape and object-view-box
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().
Sep 7, 2026 · Iris Calderón