Feature detecting “undetectable” CSS features with @supports named-feature()
The CSS Working Group’s answer to detecting behavior changes, not just parsing.
All news — Page 3
Firefox 155 release notes for developers
attr()for any property, theprogress()andalpha()functions,font-width, andPromise.allKeyed().
Modern Web Guidance as a starting point for my own token skills: getting agents to write better CSS
A Baseline-aware skillset from Google, extended with project-specific CSS rules and fallbacks.
Highlighting a range of text inside a form field
The Custom Highlight API finally reaches form controls thanks to OpaqueRange in Chromium 152.
Making a long list fast: content-visibility vs. virtualization
Why unmounting rows costs you find-in-page, anchor links, focus, and per-card state.
What’s new in Chrome 152
Pseudo-element events, device performance tiers, connection allowlists, and relative alpha.
Balancing flex items with flex-wrap: balance
Five ways to avoid an orphaned item on the last flex line, from container queries to one property.
Intent to ship: JPEG XL
Firefox ships the format with the Rust jxl-rs decoder, progressive rendering, and lossless wins.
A look at the
<geolocation>HTML element and how it worksChrome 144 ships a permission-friendly element with autolocate, watch, and a
:grantedpseudo-class.
My HTML boilerplate in 2026
A commented head section with text scaling, SVG favicons, markdown alternates, and fediverse tags.
Field guide to the Chrome DevTools Performance panel
An interactive walkthrough of the waterfall, flame chart, LCP, CLS, INP, and the Insights panel.
The case for tri-state dark mode toggles
A reply to Lea Verou: why the system option still earns its place in a theme switcher.