Web dev challenge: use the 3 most recent Baseline Newly Available features to build a demo of some kind. - field-sizing - :open - container style queries Easy, they're all CSS things. field-sizing and :open both work with <select> elements. So, maybe some fun responsive drop-down.

#CSS :has(.Baseline-Widely-Available) 19-06-2026

It's the summer of Standard.site and overwhelmingly, we've heard folks find the process complicated so Declan Chidlow is here to break the process down into something rather straightforward for you. piccalil.li/blog/publish...

👀 crrev.com/c/7952977 “Support colorspace and alpha attributes on <input type=color>” Available for testing behind the Experimental Web Platform Features flag in Chrome Canary, starting tomorrow.

Let’s Play With #css Gap Decorations!

🚨🚨🚨 #css text-box-trim/edge 🚨🚨🚨

The HTML <dialog> and <button> elements, the HTML Invoker Commands API, the View Transitions API + Progressive enhancement == *chefs kiss* pqina.nl/blog/animati... Lovely post from @rikschennink.com

The future of #CSS looks very different by @kevinpowell.co

We've been experimenting with CSS´s upcoming Random() function to see what it can do. In the mean time we found a few browser crashes and a way to implement random-item() before it actually lands. Best viewed in Polypane 29+ (For now!) polypane.app/blog/experim...

Write more resilient UI tests with #HTML semantics

I saw a great introduction to CSS Grid Lanes, aka Masonry Layouts, by @patrickbrosset.com at CSS Day 2026. I liked the versatility of its use cases, but I was also concerned that it's inaccessible by default. matuzo.at/blog/2026/gr...

Feeling warm? Why not sign a petition? #uk

Looking for a Front-End Developer seeking new opportunities. I build responsive web experiences using JS, HTML, and CSS. #FrontEndDeveloper #JobSearch #WebDev

Blink: Intent to Ship: Reference Target

With style queries now in all browsers, here's my take on the best way to do dynamic color theming with modern CSS: - Custom properties - light-dark() - contrast-color() - Style queries - Relative color syntax (^Features available in all modern browsers) Read about it ⬇️⬇️ una.im/modern-css-t...

Gecko: Intent to Ship: sibling-index() and sibling-count()

Create a legally enforceable maximum working temperature

🚀 Vite 8.1 is out ⚡ Experimental Full Bundle Mode: ~15x faster dev server startup & ~10x faster full reloads on large apps 🧩 Chunk Import Map to keep chunks stable & improve caching 🦀 WASM ESM integration 💡 Lightning CSS on the road to default 👀 and more! vite.dev/blog/announc...

If you like writing long threads on Bluesky, wait until you discover "blog posts." Start blogging with @pckt.blog, @leaflet.pub or @offprint.app today and get 25% off your first year, on us.

Astro 7 is here! A new Rust compiler, a new Rust Markdown/MDX processor, Vite 8 and more. Get ready for 60%+ faster builds. astro.build/blog/astro-7/

Astro 7.0

The `field-sizing` property in CSS seems to be super useful. Here's an example. matuzo.at/blog/2026/se...

I am attempting to launch a new No Build W3C Community Group. Sign up if you are interested in under-engineering on the web. www.w3.org/community/bl...

Can't explain how useful the article on has help me this week "How I use AI" by @michaelwarren.dev michaelwarren.dev/blog/how-i-u...

New Blog Post: View Transitions: Should you use the new `attr()` or `match-element` for the `view-transition-name`? Well … It Depends™ www.bram.us/2026/06/19/v...

🚀 🧑‍💻 My CSS Day ( @cssday.nl ) recap on the iO tech_hub. Thank you to the company for letting me go with my training budget. Fourteen talks, two days, one church in Amsterdam, Lea on gamut, Jake on the <select>, Lyra’s x86 CPU, Niels’s DOOM CSS, Una on modern UI, and many more. #CSSDay #CSS #WebUI

Good Morning

Feel nice to work on project that has a handlebars-like templating language ❤️

Bluesky License kojira.github.io/bluesky-lice...

#CSS Gap Decorations for adding lines to grid and flex gaps

#CSS has margin-trim, but there is no equivalent feature for padding-trim 😔.

Safari Technology Preview 246 - <image> values in light-dark - #CSS attr() substitution function on pseudo-elements. - image(<color>) in the <image> value type. - color-mix() with more than two colors. - alpha() relative color function. - scroll-state value of container-type. 🎉 and more...

Gecko: Intent to prototype and ship: Time picker UI

CSS field-sizing is newly baseline, meaning you can make various form fields size to their contents, without needing JavaScript.

Blink: Intent to Prototype: Implement MathML <a> element

The golden rule of Customizable <select> #html

Flexbox - #CSS for one-dimensional layouts

Firefox 152 landed today, and includes web platform features like: 🎉 CSS field-sizing 🎉 Notification actions 🎉 unadjustedMovement pointer locks 🎉 getAnimations() pseudoElement option …and more! developer.mozilla.org/en-US/docs/M...

Gecko: Intent to prototype and ship: Iterator Includes

I have a vague worry that, as we put more and more computation into CSS, web devs are going to end up with performance issues that are difficult to trace to their source compared to JS solutions. The answer is to surface this in DevTools I guess.

Who decided what ships on the web. Guest: @jakearchibald.com

Gecko: Intent to Prototype: alpha() relative color function

Well done Lewis Hamilton.

Today I made a rookie #CSS mistake. I spent an hour debugging a problem only to realise I had two files with the same name. 🤦🏾

#CSS has margin-trim, but there is no equivalent feature for padding-trim 😔.

Have vertical tabs shipped in Chrome? I don't see the option in appearance unless I use chrome/flags.

Hamilton P2 👀

My talk for #CSSday went great! I may have gotten pretty heated and upset on stage a few times 😅 Link to the slides and the library I announced "prop-for-that" on my site 🤘🏻 nerdy.dev/contextualis...

Journal: A tale of two browsers Safari 27 and Chrome 148. 🔗https://adactio.com/journal/22609

Gecko: Intent to Prototype: CSS progress() function