JSNation | The key JS conference

The latest trends in Web development.
🌷Amsterdam, June 11 & 15, York, Nov 16 & 19,

[JSNation | The key JS conference @thejsnation]

⚙️ Building a JavaScript Engine in Rust: Lessons From Boa

A deep dive by @Jason_williams into building Boa, a JS engine in Rust, and what it takes to parse and execute JavaScript under the hood. From experimentation to influencing V8 itself, this is the story of how an open-source project can shape the broader JS ecosystem.
🔗 Full recording: https://t.co/6WD9Td2mOP

[JSNation | The key JS conference @thejsnation]

AI writes the code. The skill that won't get automated is knowing what to build. 🧠

Catch @kentcdodds' full-day workshop at JSNation US covers the technical judgment that matters most right now: validating problems before committing to solutions, understanding real users, prioritizing ruthlessly, and building feedback loops that outlast the ship.

🎟 Reserve your spot: https://t.co/h5OW7ibAUa

[JSNation | The key JS conference @thejsnation]

🎤 "Agentic Interfaces: Tools, Skills, Generative UI and Web MCP"

A talk by @wesbos on where UI, websites, and browsers are headed as AI agents enter the picture. Do we add AI to our site, or does our site get added to AI? This app could have been an API!

🔗 Full recording: https://t.co/uaAt2OWNLV

[JSNation | The key JS conference @thejsnation]

What happens when AI meets a 130-year-old org? 🤖
Legacy systems, complex processes, high reliability expectations — @room_n shares real lessons from introducing AI-assisted development in a traditional environment: where it accelerates delivery, where it fails, and how to use it responsibly.
📚 Learn more: https://t.co/h5OW7ibAUa

[JSNation | The key JS conference @thejsnation]

🎭 MCP Apps – the Next Web
Websites are becoming obsolete — autonomous agents now interact with the web through MCP, APIs, and data channels instead of browsers. But some moments still need a human eye: choosing a seat, verifying intent, reviewing a decision. That's where MCP Apps come in.
@liadyosef & @idosal1 explore this "nearly headless" web — and how assistants are becoming the new browsers.
🎥 Full recording: https://t.co/6CXLojcZp8

[JSNation | The key JS conference @thejsnation]

Nicolas Dupont
NumPy for TypeScript — for real this time. 🚀
Python dominates data work partly because JS never had a real NumPy. numpy-ts is changing that — and this talk by Nicolas Dupont (@CyborgHQ) is the story of making it fast: from 15x slower than native to faster, across 7,159 benchmarks.
👉 Check it out: https://t.co/h5OW7ibAUa

[JSNation | The key JS conference @thejsnation]

🎙️ "The State of AI for Web Development"
A deep dive by @SachaGreif into the main trends revealed by this year's State of Web Dev AI survey — based on data from over 6800 developers. Real numbers, real signal, no hype.
Watch here: https://t.co/IO3AWEfY4U

[JSNation | The key JS conference @thejsnation]

🌐 What if your app didn't need any of it? @davidmarkclem shows how to build P2P apps with Pear — and rethink what "deployment" even means.

🎥 Full recording: https://t.co/vZtTzgseJo

[JSNation | The key JS conference @thejsnation]

CSS bugs are the hardest to profile — no stack traces, no clear breakpoints, just users saying "the page feels slow."

Bernie Sumption shows an AI-assisted workflow to find rendering bottlenecks fast, using Chrome DevTools MCP.

🎥 Watch the recording → https://t.co/aqh57MTfUw

[JSNation | The key JS conference @thejsnation]

What happens when your audience becomes part of the app experience?

@eddiejaoude turned a multiplayer Whack-a-Mole game into a realtime stress test, then explored the architecture behind it & lessons learned when chaos hits production.

🎥Watch the talk: https://t.co/7jLqjTMEpE

[JSNation | The key JS conference @thejsnation]

✨Taste in Software Development

Devin's CTO @stevenkplus1 on what separates good engineering from great — and why taste still matters in the age of AI.

Watch the talk recording: https://t.co/hqA738SRje

[JSNation | The key JS conference @thejsnation]

@ReactSummit @tan_stack @swmansion @biomejs Among TanStack AI contributors: @AlemTuzlak @jherr @tombeckenham @seasonsaw @ladybluenotes @tannerlinsley @KevinVanCott @DiegoGBrisa @SriketK @thruflo @50BytesOfJohn @friday_dev @wobsoriano @samwillis @ShkumbinPunchi @threepointone @sutusebastian @ThibaultJaigu & more

[JSNation | The key JS conference @thejsnation]

Congrats to all the winners 🏆 of the Open Source Awards, part of @ReactSummit & JSNation, held every year!

🚀 Breakthrough of the Year: @tan_stack Start
⚡ Most Exciting Use of Technology: TypeGPU (@swmansion)
⚙️ Productivity Booster: @biomejs
🌍 Most Impactful Contribution to the Community: @zurichjs
🤖 AI Project of the Year: @tan_stack AI
🎉 Fun Side Project of the Year: Popcorn (@swmansion)
⚛️ React Highlights: React Doctor (@milliondotjs)

Keep up your progress and inspiration, and keep contributing to the community 👏

[JSNation | The key JS conference @thejsnation]

@ReactSummit @tan_stack @swmansion @biomejs Among TypeGPU contributors: @iwoplaza @reczko_konrad @mvanhorn

[JSNation | The key JS conference @thejsnation]

@ReactSummit @tan_stack @swmansion @biomejs Among Popcorn contributors: @aidenybai @rayhanadev @nisargptel @skoshx @10xAkshay @wunderacle @bedesqui @devopensource

[JSNation | The key JS conference @thejsnation]

@ReactSummit @tan_stack @swmansion @biomejs Among React Doctor contrbutors: @aidenybai @rayhanadev @nisargptel @skoshx @10xAkshay @wunderacle @bedesqui @devopensource

[JSNation | The key JS conference @thejsnation]

@ReactSummit @tan_stack @swmansion @biomejs Among Biome contributors: @rollthedyc3 @l3ops @zzwudev @unvalley_ @duedur_dev @ooflorent @nissy_dev @jer3m01 @nicolashedger @zoomdong2 @lovely__danny @chansuke_ @engineerdesoft @boshen_c @kaioduarte @mattcompiles @superchupu @victorhomburger & more

[Joyee Cheung @JoyeeCheung]

Today I gave a talk @thejsnation about the life cycle of ESM in Node.js, how it differs in other environments and the new features that will affect these stages. Slides: https://t.co/Nlc2Hua4ne

[Mert Can Altin @mecaltin]

@JoyeeCheung @_richard_lau_ @thejsnation Was Very good presentation 🎉

[Mert Can Altin @mecaltin]

@erickwendel_ @addaleax @thejsnation Was so good presentation for performance problem catch, thanks @addaleax ❤️