Safari Technology Preview 249 brings a large set of new CSS features including `@function` custom functions, `if()`, `calc-mix()`, `attr()`, `wrap-inside`, `white-space-trim`, `text-decoration-inset`, `justify-self` on block-level boxes, and `outline-offset: inset`. JavaScript gains the `Temporal` object enabled by default. Web API additions include WebGPU subgroup support, close watchers with the `closedby` attribute for dialogs, and WebDriver support for the Digital Credentials API. Numerous bug fixes span CSS Grid layout, scroll-driven animations, accessibility (VoiceOver, aria-labelledby), Web Inspector tooling, WebAssembly error stacks, and WebRTC spec compliance.
Table of contents
AccessibilityAnimationsCSSEditingFormsHTMLJavaScriptMediaRenderingSpatial WebWeb APIWeb AudioWeb InspectorWebAssemblyWebDriverWebRTC10.9K Impressions