WebKit Features for Safari 26.5

kept by eddie may 14

Safari 26.5 introduces the :open pseudo-class, element-scoped random(), color-interpolation for SVG gradients, ToggleEvent.source, and the Origin API, along with 63 bug fixes.

I Stored a Website in a Favicon
The author encoded a 208-byte HTML page into a 9x9 pixel favicon by storing RGB values and decoded it with JavaScript, demonstrating data storage in unintended places.
also on SVG, #browser-engineering, #web-development
blog/2025/12/an-svg-is-all-you-need.mld
SVG files can serve as self-contained, interactive data visualization tools that run client-side, assignable DOIs, versionable, and durable for scientific publishing.
also on SVG
Name-only @container queries: A solution to the naming wars
Safari 26.4 ships name-only @container queries, resolving naming conflicts by allowing queries without explicit container names.
also on Safari, WebKit, CSS, #browser-engineering, #web-development
Multi-stroke text effect in CSS
Stacking CSS text-stroke layers with varying widths creates a multi-stroke text effect, though browser rendering differences (Firefox smoother than Chrome/Safari) and poor performance make it unsuitable for production.
also on Safari, CSS, #browser-engineering
Google’s Prompt API
Google's Prompt API ships as a Chrome-only web standard requiring users to accept Google's use policy and download Gemini Nano without permission, drawing opposition from Mozilla and WebKit.
also on WebKit, #browser-engineering