But but but but, will it run in node 0.0.1? /s 🙃

Storybook 10.3: MCP, a11y improvements, & workflow upgrades Component-driven development for humans and agents

Storybook 10.3 is out!

✨ Storybook MCP for React
♿ A11y overhaul fixes 100s of issues
🧑‍💻 CLI overhaul for faster, more reliable install
💅 New Viewports and Zoom UI
✅ New onboarding guide
🏭 Type-safe CSF factories for Vue, Angular, and Web Components

Take a look ⤵️

Real DOM content in a canvas: fully searchable, translatable, inspectable.

You can have forms, add WebGL effects & much more.

Imagine if this was a customizable select 🤯

A little WIP exploration (not finished) for a very exciting API.

github.com/WICG/html-in...

This article is so nice! It really goes deep into reactivity and how signals work. And those little animations showing state and notification propagation are soooo beautiful 🤩

Announcing TypeScript 6.0 - TypeScript TypeScript 6.0 is now available! TypeScript 6 is a stepping-stone release, aligning with the upcoming native-speed 7.0 release.

TypeScript 6.0 is now available!

This release brings better type-checking for methods, new standard library features, new module features for Node.js, and more!

But most important, this release brings us one step closer to the upcoming native-speed 7.0!

devblogs.microsoft.com/typescript/a...

Announcing Vitest 4.1 Vitest 4.1 Release Announcement

Vitest 4.1 is out! 🚀

✅ Vite 8 support from day 1
🏷️ Test tags to organize, filter & apply shared options
🪝 New hooks for easier tracing, transactions and AsyncLocalStorage
🔍 Async leak detection
🤖 Agent reporter to reduce token usage

And much more!

Full blog post at vitest.dev/blog/vitest-...

Release v8.0.0 · vitejs/vite Please refer to CHANGELOG.md for details.

It’s here.

github.com/vitejs/vite/...

ECMAScript Euphoria! 🎉

We don't always post when a single proposal advances, but when we do, it's Temporal -> Stage 4.

Just days shy of 9 years from Stage 1, a herculean effort on the part of many champions, delegates, invited experts, and contributors, past and present. Thank you all! 🙌

Make custom elements behave with scoped registries  |  Blog  |  Chrome for Developers You can now encapsulate custom elements.

🎉 I'm so excited that scoped custom element registries is landing in Chrome and Edge! 🥳

This solves one of the biggest complaints with the web components APIs: the global tag name namespace.

Standards is a long game though: I first proposed this in 2017! 😲

developer.chrome.com/blog/scoped-...

Announcing TypeScript 6.0 RC - TypeScript Today we are excited to announce the Release Candidate (RC) of TypeScript 6.0! To get started using the RC, you can get it through npm with the following command: npm install -D typescript@rc TypeScri...

The Release Candidate for TypeScript 6.0 is now available!

Read up on what's coming up with 6.0 & 7.0, and try it out on your codebase today!

devblogs.microsoft.com/typescript/a...

Oxfmt Beta A collection of high-performance JavaScript tools written in Rust

Announcing Oxfmt Beta

* 100% Prettier Compatibility
* Additional File Formats
* Tailwind CSS Integration
* Import Sorting
* package.json Sorting
* Embedded Language Formatting
* Node.js API
* `--migrate prettier`
* config overrides
* Full IDE support

oxc.rs/blog/2026-02...

Infographic showing Rolldown's entriesAware code splitting feature in 3 steps. Step 1 shows three entry points (Dashboard using chart.js, Admin using marked, Landing using gsap - all sharing es-toolkit). Step 2 shows the problem: without entriesAware, all entries load a single 305KB vendor.js containing all libraries. Step 3 shows the solution: with entriesAware enabled, chunks are split by usage - a shared 8KB chunk for es-toolkit plus entry-specific chunks (195KB for dashboard, 40KB for admin, 63KB for landing), reducing average page load to 107KB and eliminating unused library downloads. Code snippet shows the configuration: entriesAware: true and entriesAwareMergeThreshold: 20000.

Chunks are now entry-aware in Rolldown 1.0.0-rc.5 ⚡

What does that mean? When grouping chunks via `codeSplitting`, they can now be automatically split per entry point (usually per page), so users download less unused JavaScript.

Just set `entriesAware: true`.

Announcing TypeScript 6.0 Beta - TypeScript Today we are announcing the beta release of TypeScript 6.0! To get started using the beta, you can get it through npm with the following command: npm install -D typescript@beta TypeScript 6.0 is a uni...

TypeScript 6.0 beta is now published!

This release brings

- inference improvements for functions
- updates to package.json 'imports'
- the Temporal APIs
- alignments for the upcoming TypeScript 7.0
- & more!

Try it today!

devblogs.microsoft.com/typescript/a...

Rolldown 1.0 RC is here 🎉

🔒 Stable API: No breaking changes planned before 1.0
⚡ 10-30x faster than Rollup while staying compatible
🧩 Multiple chunking algorithm improvements
📦 3,400+ commits since beta: 749 features, 682 fixes, 109 perf optimizations

Rolldown | Rust bundler for JavaScript Fast Rust-based bundler for JavaScript with Rollup-compatible API

@rolldown.rs just released the first RC version 🎉 We’ve been using the betas for a while for our custom dev server and it has been great. It’s awesome to see it stabilize!

github.com/rolldown/rol...

Release v4.1.0-beta.1 · vitest-dev/vitest 🚀 Features Return a disposable from doMock()  -  by @kirkwaiblinger in #9332 (e3e65) Added chai style assertions for spying  -  by @ronnakamoto and @sheremet-va in #8842 (841df) Update to sinon...

The first beta for @vitest.dev 4.1 is out! 🧪

◆ Chai-style spy assertions (`toHaveBeenCalled`, etc.)
◆ `userEvent.wheel()` for browser mode
◆ Enhanced retry options
◆ Disposable returned from `doMock()`
◆ Coverage ignore start/stop hints
◆ and more 👀

Try now by installing vitest@beta

// Currently let prefs = new getUserPrefs(); if (!prefs.has("useDarkmode")) { prefs.set("useDarkmode", true); // default to true } // Using getOrInsert let prefs = new getUserPrefs(); prefs.getOrInsert("useDarkmode", true); // default to true

ECMAScript excitement 😉

Congrats to Dan Minor @mozilla.org on advancing the Upsert proposal to Stage 4 at TC39 today 🎉

let map = new Map();
map.getOrInsert(key, defaultVal);

It lets you set a default value on a map key without overwriting an existing value 👍

Node.js v25.4.0 is out! 💚

• require(esm) now stable and a new CLI flag: --require-module
• http setGlobalProxyFromEnv() added
• Multiple APIs promoted to stable (heapsnapshot, build snapshot, v8.queryObjects)
• Root CAs updated to NSS 3.117

More in: nodejs.org/en/blog/rele...

Firefox 147 release notes for developers (Beta) - Mozilla | MDN This article provides information about the changes in Firefox 147 that affect developers. Firefox 147 is the current Beta version of Firefox and ships on January 13, 2026.

Firefox 147 just landed & it's pretty huge in terms of web features:

🎉 CSS anchor positioning
🎉 The navigation API
🎉 View transition types
🎉 Brotli support in Compression/DecompressionStream
🎉 CSS module imports

And more!

developer.mozilla.org/en-US/docs/Mozilla/Firef...

[ci] release by astrobot-houston · Pull Request #15031 · withastro/astro This PR was opened by the Changesets release GitHub action. When you're ready to do a release, you can merge this and the packages will be published to npm automatically. If you're not read...

Thanks to @43081j.com for contributing a **massive** improvement in rendering performance. Benchmarking reports as high as 11x improvement 🤩. Upgrade to astro@5.16.7 when you can.

James gave an excellent explanation of the improvement in the PR: github.com/withastro/as...

Open source ftw!

What’s New in ViteLand: December 2025 Recap Our December 2025 recap features big Oxc releases: Oxfmt alpha builds and Oxlint's type-aware linting alpha, plus updates across Vite, Vitest, Rolldown, and community highlights.

Happy new year 🎉
Our December 2025 recap is out!

⚡ Oxlint type-aware linting alpha
🎨 Oxfmt with @vuejs.org, Markdown & JSON support (+ more languages)
📦 @rolldown.rs chunking improvements
🔬 @vitest.dev OpenTelemetry & import breakdowns
🗺️ 2026 Oxc roadmap
👀 and more

voidzero.dev/posts/whats-...

Signals vs Query-Based Compilers With the rise of LSPs, query-based compilers have emerged as a new architecture. That architecture is much more similar and also different to Signals than I initial assumed them to be.

Putting Signals in your compiler? Turns out this is already happening.

marvinh.dev/blog/signals...

React Wrappers Generate react wrappers for your custom elements / web components

Happy New Year! The #WebComponents @react.dev wrappers have joined the WC Toolkit and have some nice upgrades, including:

- Strongly typed events
- CSS variable types for components
- Component and tag name formatting
wc-toolkit.com/integrations...

Introducing Flint: a fast, friendly linter.

Flint is an experimental linter made to validate several hypotheses: hybrid linting, streamlined rich configuration, thorough docs & plugins, and tooling coordination.

Expect to hear more about Flint over the next month. ❤️‍🔥

www.flint.fyi/blog/introdu...

Indeed! And often I prefer to mock less and test more like an end user would, in exchange for a slight performance penalty compared with more “unit” style tests. I find it makes tests provide a lot more bang for the buck.

Vitest Next generation testing framework powered by Vite

Absolutely! We’ve been using Karma for years and have been moving to Vitest and it has worked great for us. Some folks have struggled a bit with some of the mocking limitations (vitest.dev/guide/browse...) but have managed to find other ways around it. Overall, really nice!

Changelog for a few Lit packages. See https://github.com/lit/lit/pull/5183 for details.

Changelog for a few Lit packages. See https://github.com/lit/lit/pull/5183 for details.

📣 We just published our End-of-Year / Happy Holidays Lit releases!

- 👩‍⚕️ Many bug fixes!
- 📄 A new lit-labs/forms packages for form-associated elements!
- 🎾 A new Spring controller in lit-labs/motion!
- 🏎️ Massive SSR performance improvements!
- 🧩 A lit-html template parser in lit-labs/analyzer

We’re sharing details about a potential vulnerability that may affect a small subset of built and published Storybooks. 🧵 (1/4)

ECMAScript excitement 😉

The Temporal API ships in Chrome 144 Beta today 🎉

developer.chrome.com/blog/chrome-...

Right on time. Arriving in the Chrome Stable release in approximately one month!

Announcing Oxlint Type-Aware Linting Alpha Oxlint's type-aware linting has reached alpha status. Type-aware rules can be manually configured, disabled with in-line comments, and fixed automatically. This milestone also includes more rule…

Announcing Oxlint Type-Aware Linting Alpha 🎁

Just a few months after our technical preview, type-aware linting reaches the alpha milestone!

✨ Type-aware rules can now be configured
🙈 Inline comments to disable rules work for type-aware rules too
✔ Auto fixes for type-aware rules are now available