DHH has been an advocate for no-build. Hey.com has 147 stylesheet link elements and 259 modulepreload links in the head. How bad is that for performance?

Can’t say I ever see developers mention CSS Typed OM but cool to see it land in Firefox Nightly nevertheless bugzilla.mozilla.org/show_bug.cgi...

👀 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.

Quick SVG survey 🗳️ What are your pain points with SVG? What features are missing? What bugs matter the most?

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...

The Chrome DevTools team are doing a "papercuts" sprint where they try to address lots of small, irritating bugs and annoyances. Reply with crbug.com links (no bug, no fix—that's the deal!) and will see what we can do. No promises though as some may be features/too big/unclear how to solve.

A pile of new CSS features just landed in Safari Technology Preview webkit.org/blog/18128/r...

👉 Eemeli Aro discussed a HTML proposal for localising websites without relying on custom solutions. github.com/mozilla/expl... 👉 Developers could bind elements to localised messages provided by a localisation resource. 👉 This HTML proposal complements the TC39 Proposal for Intl.MessageFormat in JS.

What's this, a new HTML proposal? Built-in localized time formatting in HTML! github.com/whatwg/html/...

Transparent video is still tricky on the web. Browsing the Google Pixel site and came across an example that looks astoundingly bad in Safari. store.google.com/product/pixe...

If your content is served over HTTP/3, make sure your DNS record advertises it, otherwise you're missing out on free performance. Check your site here: savearoundtrip.com

I joined the @syntax.fm lads to chat about Firefox, prioritising features, the headingoffset API, our opposition to Chrome's prompt API, and loads more. syntax.fm/show/1012/wh...

What are the use cases for this?

Highly excited for the CSS image-animation property. Pause and play animated images on hover with pure CSS Works on CSS background-images, HTML img elements, video poster images. Already in Chrome Canary (behind a flag) chromestatus.com/feature/5078...

Modern attr() is behind `layout.css.attr.enabled` in Firefox (set it in about:config). It's enabled by default in @firefoxnightly.bsky.social In Firefox DevTools, there will be a tooltip when the attribute value doesn't match the type you declare in CSS #cssday

A lot of people have written about dark mode but hopefully I cover some new ground here: olliewilliams.xyz/blog/dark-mo...

Introducing the Field Guide to Grid Lanes #css

RE: https://front-end.social/@kizu/114218387531781840 Hello?! Early #css Week breaking news! Linked parameters are moving!!1 :blob_cat_aww: https://github.com/w3c/csswg-drafts/issues/14028 Quick test in Firefox Nightly: https://codepen.io/editor/kizu/pen/019eae1c-a249-782c-ad4b-6a4e36704151 […]

Do other browsers have any intention of implementing the HTML model element (for 3D models). The spec is an unofficial draft. Seems like Safari has skipped the standards process somewhat. immersive-web.github.io/model-element/

I support the attempt to put HTMX in the browser. The first part is stuck in PR limbo github.com/whatwg/html/... The second part might be too much of a security issue? 🤔 github.com/whatwg/html/...

In just under two weeks we will welcome over 160 people to the 2026 Hackfest! 9 talks and 22 breakout sessions over 3 days. We're looking forward to seeing everyone! In person registration is closed but you can still tune in remotely June 15-17. For more information: github.com/Igalia/weben...

These might be the biggest changes to HTML in decades. Declarative Partial Updates let you render out-of-order HTML and build UI placeholders with zero JS. Combine it with the new streaming APIs to fetch and inject HTML directly into the DOM, simplifying Island architecture → goo.gle/49Bz9nK

#css Single colour image by @ollie-williams.bsky.social

@jondavis.bsky.social does Safari plan to ever support software decoding for AV1 video? Its supported by all other browsers but I’m having to use fallback videos for older Apple devices which is laborious on my part.

Preact-like signals in 0.5K with all tests and benchmarks + 100% code coverage up and running, in case you'd like to explore signals without paying any "bloat tax" (not that Preact or alien-signals are bloated, yet this is 0.5K) github.com/WebReflectio...

HTML might be getting out of order streaming natively in the future. I really like this: developer.chrome.com/blog/declara...

Hoping we get the ability to override prefers-color-scheme via javascript eventually. drafts.csswg.org/mediaqueries....

Very cool that CSS light-dark() now supports images (including gradients) for use with CSS background-image. www.bram.us/2026/03/19/m...

I like DOM template API spec so far. The direction is awesome.

I'm proposing a way to be able to persist iframes across navigations github.com/WICG/proposa... Best idea or worst idea??

So here's an interesting little thing or 2 @nomster.bsky.social , @foolip.org , and myself have been cooking up—along with lots of help from others!: developer.chrome.com/blog/declara... This could lead to some VERY interesting changes in how we write web pages. Would love to hear your thoughts!

❓ A question for web developers ❓ If you do layout in CSS, what's missing? I'm especially interested in hearing about use cases that aren't yet solved by existing CSS layout features. #css #webdev

flex-wrap: balance has the same issue as text-wrap: balance where you can't have the items/text be both left-aligned and centred when they're wrapping. Still a cool feature though. chromestatus.com/feature/4547... codepen.io/cssgrid/pen/...

CSS Gap Decorations is shipping in Edge and Chrome 149! Really proud of all the work the team did to solve this longstanding web developer ask. developer.chrome.com/blog/gap-dec...

Blink: Intent to Ship: Responsively-sized <iframe>

🚀Rolldown 1.0 is here!🚀 Rust-based high-performance JavaScript bundler. 🏎️ Runs at native speed that’s up 30x faster than Rollup 🤝 Compatible with existing Rollup & Vite plugins ⚡The underlying bunder for Vite After 2 years, Rolldown is officially stable and has 20+M weekly downloads.

We, Chrome, are currently working on a way to do route matching in purely CSS as well: drafts.csswg.org/css-navigati... (draft spec). This addition would remove the need for any script to achieve directional View Transitions 🥳

In Chrome beta, native form controls no longer reflect the users system preferences. Weird to describe this as a "feature launch" that "introduces more consistent user expectations for system colors" when it's actually a regression.

The Web Frameworks Community Group now has over 60 members representing Alpine, Astro, Ember, Lit, Lustre, Marko, Preact, Qwik, React, Ripple, Solid, Stimulus, Svelte, Vue, Web Components, htmx, and more! Did I miss your favourite? Come join us and represent! discord.com/invite/fXCng...

🆕 The URL Pattern API is Newly Available! Use it to match and extract parts of URLs, no need to reinvent routing logic. Supports literals, wildcards, named groups, and even regex constraints. Learn how it works 👇 developer.mozilla.org/en-US/docs/...

Remix 3 preview is ready Just run `npx remix@next new my-remix-app` to get started remix.run/blog/remix-3...

If you’re an open source maintainer, you can get paid to participate in web standards. A great initiative. Funded by the German government, but anyone around the world can apply.

Blink: Intent to Ship: Focusgroup

Added support for the closedby attribute on dialog elements. Added support for the more powerful version of the CSS attr() function.

If you're a framework author or maintainer, please consider joining the WFCG! discord.gg/fXCngmSwHz We're trying to find ways the web platform can be improved for frameworks, what new primitives can be added, or what can be changed. We'll be talking about templating today, come join!

Blink: Intent to Experiment: Parse processing instructions in HTML

My favorite #CSS additions are often the simple ones that make a big difference (in UX or DX), and the light-dark() function adding support for images is now one of them 🙌🏻 www.bram.us/2026/03/19/m... @bram.us

POLLS: The CSS Working Group is looking for author feedback on two topics related to CSS Gap Decorations. Questions below. For background information on Gap Decorations, see the explainer: github.com/w3c/csswg-dr...