Want to start writing tests but no idea how to get started? The @vitest.dev docs now have a Learn section that covers evergreen concepts (matchers, tests, dealing with async code, mocks, ...) and also current topics like writing good tests with AI! Time to get started 🎉

@vitest.dev now has a new `--experimental.preParse` flag to avoid running all test files when you apply filters. For example, if you have `.only` tests or use `-t` or `--tags-filters` Vitest will now only run matching test files. Try it now! vitest.dev/config/exper...

a story in two acts

There is no ethical consumption of HBO’s Harry Potter series

I was once told by an established maintainer not to bother using an alternative to their package, because theirs will be in your stack either way. Super happy we're proving them wrong 😄

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🚨No Joke: Conservatives in the EU Parliament (EVP) want the vote on #ChatControl 1.0 to be repeated this Thursday - even though the Parliament already voted NO! 😡 Make sure your MP stays strong. Contact them now! 👉 fightchatcontrol.eu#contact-tool

new post on my personal blog. i think these three areas often go unexplained, so hopefully this explains why some of these packages exist. these are fine to exist but the majority of developers shouldn't have to pay the cost for them.

are these Node 0.x consumers in the room with us right now?

hacking away at a new @npmx.dev feature of course 👀

This day 4 years ago I sent my first PR to @vitest.dev. Back then it was on v0.7.4 with 80K weekly downloads. After one year and +70 more PRs, @antfu.me and @erus.dev invited me to join the team. Today we are at v4.1.0 with 35M weekly downloads. Maybe in 2030 we'll have Vitest 8 with 140M downloads.

20,000 ⭐️ -> Oxc

Vite and Vitest have been a pleasure to use in my oss projects since switching to them. Kudos to those teams.

Can't wait until the @vite.dev community discovers the stunning new starter templates 🔥

Announcing Vite+ Alpha. Now open source. To make JavaScript developers more productive than ever before. A single binary that: ◆ Unifies your frontend toolchain ◆ Manages your runtime & pkg manager ◆ Caching & monorepo support Works with every framework and meta framework in the Vite ecosystem.

Very excited about this update! Tons of new stuff coming 🎉

⚡️ Vite 8.0 is here! The most significant architectural change since Vite 2. ⏬ Powered by @rolldown.rs bringing faster production builds and more consistency 🛤️ New features such as tsconfig paths and emitDecoratorMetadata support vite.dev/blog/announc...

hire willow

Honoured to open the @vuejs.amsterdam with a talk about URLs and State! You can check the demo at esm.is/url I will share the code later today!

Dropping 3 announcements in a single talk at Vue Amsterdam this week. @vuejsamsterdam.bsky.social

👀 👀 👀

VoidZero team: "This is what a healthy open-source ecosystem looks like: independent projects pushing each other forward. npmx helps developers find better packages, and their real-world usage helps us build better tools to create them with." 🤝 Shoutout to @voidzero.dev for sponsoring us, too! 🤍

@vitest.dev vscode extension now supports @deno.land!

We're all standing on the shoulders of giant women. Thank you for fighting for your rights and for the rights of us all. We care. We appreciate you.

this is open source

what's up, @github.com? what is it even supposed to be 🫣

Deutsche Bahn is so unpunctual, it’s not funny anymore. But that doesn’t mean you can’t have fun with it

npmx is now in alpha: this is our story, as told by our team and friends

So do I

A modern browser for the npm registry that nudges the ecosystem towards best practices and standards perfectly aligns with our mission: to make the next generation of JS developers more productive than ever before. We're happy to support our friends at @npmx.dev!

Today is the day, the EU decides on Chat Control 1.0. Will they let the Trojan Horse through the gate and let Google, Microsoft, LinkedIn etc continue to scan all your messages? We at Tuta say NO.  ❌ No scanning ❌ No mass surveillance ❌ No age verification

Angular hit 100k stars on GitHub :) That’s a great milestone!

Flaky tests and memory leaks are the worst. @vitest.dev now has a flag that catches uncleared intervals, lingering servers, and other async operations leaking across your tests. Available in the latest 4.1 beta. Big shout out to @ariperkkio.dev from the Vitest team for landing this PR! 🔥

Vitest 4.1 is on the horizon, but we're already looking ahead! What are your main pain points in your testing workflow right now? Let us know in the Vitest 5 discussion thread!

In the next version of Vitest you can track leaking asynchronous resources via `--detect-async-leaks` option! Available in v4.1.0-beta.4 release. 🔍 (notice missing await in the example)

Do not copy/paste AI-generated answer to a PR review comment. Use your own reasoning and understanding. It’s both disrespectful and unprofessional to the reviewer ☹️. If you can explain why that AI-solution works yourself, how do I trust you know what you are doing?

simply, more OSS projects should DO THIS. OSS is a long playing game, if not forever. but we are people behind those projects, and we need good rest and balance to keep things sustainable. I am super happy to see this move and looking forward to see how it could change how OSS works for all of us.

I just tried the package comparison in @npmx.dev to decide between two packages. Where has this been all my life?! 😍

AI agent writes a PR, gets rejected, crashes out and writes a call-out blog post Absolute cinema crabby-rathbun.github.io/mjrathbun-we...

if you are mad at on open source project, bashing it on social media doesn’t help anyone and doesn’t even boost ego that much

"I have received. Other people helped me. Now, if I'm able to help other people, that's a pleasure. [...] I hope that is a perpetuating thing." — @danielroe.dev, maintainer of @nuxt.com and @npmx.dev

Seeing how quickly @npmx.dev came onto the scene and how many developers from different backgrounds came together to build it gives me hope for the future. The real value is always the people and the culture surrounding them.

`npm isnt pnpm` is a valid command, can you guess what it does?

Excited to announce that I've officially joined @chromatic.com! My main focus will be working around features related to @vitest.dev 🤝

🧪 `@nuxt/test-utils` v4 is out 🚀 👺 mocking is much more reliable ⚡ works with vitest v4 + Vite's native Module Runner ⚗️ registerEndpoint improvements much thanks to github.com/yamachi4416 and @adamdehaven.com ❤️ 👉 github.com/nuxt/test-u... let me know how it goes! 🙏

For all your AsyncLocalStorage needs, Vitest 4.1 now supports `aroundEach` and `aroundAll` hooks! main.vitest.dev/api/hooks#ar...

It has been more than a year since I deactivated my X account. I had 12K followers there, a bit less than the good folks I found posting into the atmosphere. 5K posts are a lot. It shows how many conversations I enjoyed here. This is a good place to connect with others. A good place for adventures.

let's have some good old open source adventures y'all :)

Every test suite eventually categorizes tests: "skip this in CI," "this one is flaky," "that one needs more time." and so on. Vitest 4.1 (in beta right now) introduces Test Tags: You can now define these categories globally, attach config or behavior and eventually filter what runs.

The State of JS 2025 results are out! 🏆 Most Adopted Tech → Vitest 🏆 Highest Satisfaction → Vite (98%) & Vitest (97%) 🏆 Highest Interest → Vitest (83%) & Rolldown (80%) But that's not all! A thread 🧵