Viktor Lázár

Level 0x40 Labs is a dream of mine finally materializing. As I like working on various projects, this studio is versatile, but will deliver projects that I can always put love and trust into. Focusing on development tools, instruments for artists, and retro-inspired old-school games. level0x40.com

The first new project I can share is for my new studio named Level 0x40 Labs: a micro-frontend projection for the web. It supports all major frameworks and major fullstack solutions including server-side rendering. More info at virtual-frame.level0x40.com and level0x40.com.

For a long time I was not satisfied using react-server-dom-webpack in a Vite-based runtime, so I created a new RSC package from scratch but on par with the original. It ended up being faster, free of React dependencies, without export condition coupling. react-server.dev/advanced/bun...

Tanstack introduced RSC support like it’s innovative in how you can use it, but react-server has a similar low-level RSC API since May 2025. Additionally, while being an RSC-first runtime, it also supports SSR and sends hydration data in RSC to keep original types. react-server.dev/features/cac...

After working on Remote Components for a bit more than a year, I found myself with plenty of time to finally work on my own projects. So I made react-server complete and now I would consider it the best React solution, and I’m using it in various other projects without question. react-server.dev

📢 React Vienna Meetup in June: 🗓️ June 3 · 18:30 CEST 📍kununu · Schottenring 2-6,4th floor · 1010 Vienna 💬 Remote Components with RSC by @lazarv.dev 💬 Building real-time fingerspelling recognition in React Native by Elena & Niklas 💬 Automating JSDoc with Github actions by Adrián

no idea how we'll ever be able to thank @joyeecheung.bsky.social for all her efforts to port `require(esm)` to Node 20 🥹

🎮🎸📺 I've always loved gaming, music, and movie/TV-themed T-shirts, but now I have two new favorites! 🎉 My first @lazarv/react-server shirts just arrived! 😎 🔥 A little geek swag never hurts! And yes, dark mode included - one black, one white, just like the docs! ⚫⚪ What do you think?

New blog post! Let's move to ESM! 😈 👀 antfu.me/posts/move-o...

hey dev tools companies! I am actively booking season 2 of Web Dev Challenge and I want to work with you. we’ll pick a use case and get devs to build an app using your tool — then we’ll open up the challenge to the community for fun & prizes! limited spots available — hit me up at info@codetv.dev

Today we’re happy to share our plans for Biome 2.0 as well as the rest of our roadmap for 2025. Read all about it here: biomejs.dev/blog/roadmap... #OpenSource #WebDev #Tooling for #JavaScript #TypeScript #CSS #GraphQL and #GritQL, written in #Rust

We just released the beta for TypeScript 5.8! This release brings support for Node.js' require(ESM), smarter/safer checks for functions using advanced types, a few great optimizations for editor scenarios, and more. Give it a try! devblogs.microsoft.com/typescript/a...

TIL you can set a successor to your GitHub account in case accidents happen. This is one of the best GitHub features I haven’t discovered for a while. Highly recommended for every open source maintainer to set it up! docs.github.com/en/account-a...

Looks like @renovatebot.com now supports pnpm catalogs!

Never bet against @vite.dev.

Announcing ES Module Shims 2.0. The latest version of what started out as an import maps polyfill now supports production polyfilling of more than 8 existing and upcoming native browser modules features 🧵

esm.sh v136 has been deployed with - builtin @jsr.io (h/t @lcas.dev ) and pkg.pk.new (h/t @aslemammad.bsky.social @amirsakhravi.bsky.social) registries. - more stable package version resolving - use @pi0.io's github.com/unjs/unenv - and more ↪ github.com/esm-dev/esm....

Public acknowledgments make a massive difference in the long term. Thanking the people who helped you and the projects that inspired you allows the whole ecosystem to weave a narrative around the shared commons we're creating together. I'm always happy when OSS projects send flowers to others 💐

5 years in, I'm still thinking about how we can enable streamed execution of ES modules: docs.google.com/document/d/1...

If you've got a podcast or interview show, I've got availability & a lot to say & I'd love to join as a guest! If you're interested in talking about: - Uncommon approaches to reaching dev audiences - Learning how to get paid to have a heck of a lot of fun I love a good conversation — hit me up!

Saw a take that "bad docs are better than no docs" and just... no. *Imperfect* docs are better than no docs. (Who's perfect?) *Incomplete* docs are better than no docs. (Docs are never done!) But don't set "bad docs" as your bar. They frustrate your users and are actively harmful to your project.

posted some thoughts on making a profit from open source 💰💰💰 roe.dev/blog/zero-su...

🚀 @lazarv/react-server is now compatible with @bun.sh! Faster startup, improved DX, and a smoother developer experience - all with Bun’s speed and efficiency. Try it out today! 👉 react-server.dev/guide/get-st...

🚀 First major @lazarv/react-server update of 2025 is out now! Showcasing new features and a ton of bugfixes in a new Pokémon example app, including form-driven navigation, smarter revalidation, and better error handling! Try it now and check out the updated docs at react-server.dev!

And for Vite integration: we are now passing all relevant tests in github.com/rolldown/vite, the temporary fork of Vite that runs on Rolldown instead of esbuild / Rollup. Expect a proper release early 2025!

🎁 A surprise holidays gift: after over a year of hard work, we have just published Rolldown 1.0.0-beta.1!

React v19 is now stable! react.dev/blog/2024/12...

Vite 6.0 is out ⚡️ vite.dev/blog/announc...

The atmosphere here on 🦋 is so awesome! I originally registered to 🦋 on June 29th. It was quiet, but now it's vivid, lively, friendly, and welcoming! I can focus only on a single platform, so I consider 🦋 the new main platform for me from now on. No turning back!