CSS @​scope has landed in Firefox 146, making it a new baseline feature. Here's how it works:

What are you all using for CI/CD these days?

Web Performance Calendar day 6 with Aaron T. Grogg (@aarontgrogg.com). What if I told you that you need low-to-no JavaScript for interactive UI elements such as accordions, auto-expanding or auto-suggestion inputs, modals, hamburger menus and even more... calendar.perfplanet.com/2025/nolojs-...

Oh wow, we just passed 100 stars on GitHub 🤩 Thanks everyone, it means a lot! Here's to the next 100 stars!

Very interesting conversation. For me, the main take-away was really that different people mean very different things when they say "encapsulation". (1/n)

Improve TTFB and UX with HTTP streaming!

@guypo.com I just discovered your awesome post on mobile browser cache sizes from 2012. Do you know of any more up-to-date sources or do you think it's still the same? www.guypo.com/mobile-brows...

If you haven't seen this yet: @infrequently.org looked at SPAs reporting soft-navigations to the RUM Archive: On average, they see only one (1) soft-navigation for every full page load! This suggests that for most SPAs out in the wild, it's not worth being an SPA.

Looks like we’re doing Tailwind takes again (thanks @wlls.dev and others for the inspiration!) We take a step back and look at abstractions like style names, components, and build steps. What do we gain and lose by using them?

Had a lot of fun generating OpenGraph images from text with the standard Canvas API.

Journal: Why use React? Or, more precisely, why use React *in the browser*? 🔗https://adactio.com/journal/22265

I think the dependency "cooldown" approach is fundamentally flawed and a total distraction from the work that would actually solve supply chain issues - sandboxing and attestation. insanitybit.github.io/2025/11/22/o...

@scottjehl.com recently posted about the pain of generating Open Graph images. Happy to report that we have a light-weight solution. And we blogged about it:

I got nerd-sniped to spec a hypothetical <input> type for emojis and other special characters...

posted this 6 years ago and it’s still relevant

Do you agree?

Today on the pod, Node 24 goes LTS, Nuxt Image V2 brings TS goodies, and Anders shares insights on TypeScript's AI era rise. Plus community takes on engineering practices! share.transistor.fm/s/b87c759b #typescript

When you start arguing for HTML/CSS, but end up in a buzzword bingo contest instead. Oh well, at least I “won” 🙈

websites in 2025

New blog post on how to incrementally migrate from Express.js to the standards-based Request/Response-API mastrojs.github.io/blog/2025-11...

✨ One line of CSS. Smooth page transitions. No JavaScript. ``` @view-transition { navigation: auto; } ``` The 🆕 CSS View Transitions bring native animations to multi-page apps, no SPA setup needed! Explore now 👇 developer.mozilla.org/en-US/blog/...

We Completely Missed width/height: stretch: "stretch does the same thing as declaring 100%, but ignores padding. In short, if you’ve ever wanted 100% to actually mean 100% (when using padding), stretch is what you’re looking for." #CSS css-tricks.com/we-completel...

I wrote down what I struggled with when porting Mastro to Bun: mastrojs.github.io/blog/2025-10... I’m sure the #Bun folks will tell me I’m doing it all wrong. Suggestions welcome!

Besides running on Deno, Node.js, and inside a web browser as a VSCode extension, Mastro now also runs on Bun! 🥳 mastrojs.github.io

In case you missed it, I wrote about the basics CSS Anchor Positioning. 🔗 ishadeed.com/article/anch...

I wrote down "what I learned porting Mastro from Deno to Node.js" Hope my learnings help somebody on their next server-side JS/TS project! mastrojs.github.io/blog/2025-10...

One month ago I submitted this to Interop. Unfortunately was not selected for this year. But probably also due to the noise that made, at least web devs are now being made aware of this huge Safari bug: top-level await is no longer considered 'baseline' caniuse.com/mdn-javascri...

Mastro now runs on Node.js 🎉🍾 Deno makes your life still a bit easier, but I can appreciate that people like Node’s commitment to stability. And it’s catching up: can run TypeScript natively now, has a builtin --watch flag and test runner, etc. Share if you care! mastrojs.github.io

Thanks @una.im for showing us the future of HTML and CSS in "Back to the future: of web development". We've never been more excited about... not using JavaScript 😅❤️ www.youtube.com/watch?v=BEXe...

Mastro (currently Deno and browser only web framework) is coming to Node.js! Just not sure whether via JSR (and they recommend pnpm), or via old NPM. Thoughts?

With all the excitement of view transitions coming to Firefox (which is great!), just be aware that cross-document view transitions for MPAs are “level 2” and thus only in Chrome and Safari so far. But I’m sure it won’t be long, and it’s just a progressive enhancement. No reason to not add it now!

Journal: Simplify Reminding myself just how much you can do with CSS these days. 🔗https://adactio.com/journal/22178

“They called me just after midnight. Said they’d found another one. A website that used to be fast, lean, full of life, now lying cold on the server room floor.”

SVGOMG has been updated to use SVGO 4! (thanks Adrien Crivelli!) This is the URL for SVGOMG. Unfortunately someone maintains a fork with ads, so, err, don't use that 😀 jakearchibald.github.io/svgomg/

I made a submission to #Interop 2026 – the WebKit bug that results in a race condition with multiple top-level awaits in different modules: github.com/web-platform... We’ve talked about this one on here @rich-harris.dev and @jensimmons.bsky.social Let me know if I should add anything else?

New chapter is up, showing how you can precompute assets and HTML pages in a unified way. (spoiler: it’s just like static site generation, but for only a subset of routes) #WebDev mastrojs.github.io/guide/bundli...

Why are you shipping 3MB of JavaScript to animate a link? Modern CSS now handles seamless page transitions - natively. No routing hacks. No hydration tax. No excuse.

Forget SPAs, choose MPAs. We interview @mb21.bsky.social, the creator of @mastrojs.bsky.social, a modern JavaScript meta-framework designed to build multipage apps (MPAs). By @lorainelawson.bsky.social

The Astro-based Starlight framework was already very good. But by moving the docs to Mastro itself, I could declutter things even further.

New website up! mastrojs.github.io