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Kræn Hansen

@kraenhansen.dk

330 followers 220 following 460 posts

Software craftsman, particularly interested in local-first software, databases, sync engines and (react) native code. Father of three 👭🏼👶 from Denmark 🇩🇰 Building DevTools at MongoDB 🍃 Accepts sponsorships 🐙 https://github.com/sponsors/kraenhansen

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Kræn Hansen @kraenhansen.dk · Jul 10

Announcing Node-API Support for React Native
callstack.com/blog/announc... #reactnative #nodejs

Announcing Node-API Support for React Native

We are bringing Node-API to React Native to simplify native module development. Learn why this ABI-stable, cross-runtime system could replace JSI and unlock faster builds, better maintainability, and ...

callstack.com

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Kræn Hansen @kraenhansen.dk · 3d

Love how much of the latest @reactnative.dev release is removal and deprecations! github.com/facebook/rea...
While it might cause downstream friction, it's such a healthy sign for a project to not "just add on" but tackle its technical debt head first! I hope this doesn't stop if we ever get to 1.0!

github.com

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Kræn Hansen @kraenhansen.dk · 4d

With React transition to a new technical governance structure, I'm more excited than ever to contribute. It's a marathon, not a sprint and it's here to stay.

react.dev @react.dev · 4d

Introducing the React Foundation

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Kræn Hansen @kraenhansen.dk · 4d

"Claude, remove lines until its no longer broken" 🤔 Seems an awful lot like the prompts I use to fix the bug 🫠

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Kræn Hansen @kraenhansen.dk · 5d

(not referring to @justinpoliachik.com posting on Bluesky, btw 🙈)

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Reposted by Kræn Hansen

R "Nearest" Nabors @nearestnabors.com · 5d

PEOPLE! Nominate your favorite opensource maintainers NOW!

www.commits.dev

The Commits Award Show | August 25, 2026

Join us as we honor open-source innovators, share their stories, and give them the flowers they deserve. The real reward of open-source? The community that builds it.

www.commits.dev

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Kræn Hansen @kraenhansen.dk · 5d

I don't know why we collectively tolerate this 👇

JP @justinpoliachik.com · 5d

debugging e2e tests where the iteration cycle is ~5 minutes is hell

way too slow to find any flow
too quick to context switch to another task

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Kræn Hansen @kraenhansen.dk · 5d

Awesome! I've opened github.com/nodejs/abi-s... and I intend to join the Node-API team meeting on Friday to discuss this in detail 🙂 (link for the meeting on nodejs.org/en/about/get... if you'd be interested in joining as well)

Node-API Conformance Test Suite (`node-api-cts`) · Issue #470 · nodejs/abi-stable-node

As Node-API is gaining popularity as a de-facto standard for ABI-stable access to JS engines and runtimes, I'd like to propose a project, implementing a pure ECMAScript Conformance Test Suite (CTS)...

github.com

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Kræn Hansen @kraenhansen.dk · 5d

From github.com/oven-sh/bun/... it looks like Bun is not testing the implementation at all, but that can't be right? I see some tests in github.com/oven-sh/bun/...

Implement Node-API in bun.js (napi) · Issue #158 · oven-sh/bun

Node-API is Node.js' native addon API. The goal of this project is for many Node-API addons in bun.js to just work, without asking maintainers of node modules to make changes or rebuild their code ...

github.com

Kræn Hansen @kraenhansen.dk · 5d

@mhdawson.bsky.social is there some official way to get a topic on the Node-API team's agenda for the meeting on Friday?

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Kræn Hansen @kraenhansen.dk · 5d

I plan on joining the Node-API team meeting on Friday to discuss this in detail 👍 I know of github.com/nodejs/js-na... but this is archived and seem a bit narrow in scope, as I imagine a CTS would over the runtime functions, like async work, etc too. How about github.com/nodejs/node-...?

GitHub - nodejs/js-native-api-test: Node.js js-native-api-test suite, externalized so that it can be used to test Node-API implementations outside of Node.js

Node.js js-native-api-test suite, externalized so that it can be used to test Node-API implementations outside of Node.js - nodejs/js-native-api-test

github.com

Kræn Hansen @kraenhansen.dk · 5d

@nodejs.org & @nodeland.dev as part of landing Node-API support into Hermes & React Native, I want to build a pure ECMAScript (no Node.js runtime APIs) conformance test suite for Node-API implementors to test against. Is this something you'd be interested in adopting, collaborating on or sponsor?

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Kræn Hansen @kraenhansen.dk · 5d

@deno.land & @bartlomieju.bsky.social as part of landing Node-API support in Hermes & React Native, I'll build a pure ECMAScript (no Node.js runtime APIs) conformance test suite for Node-API implementors to test against. Is this something you'd be interested in adopting, collaborating on or sponsor?

Kræn Hansen @kraenhansen.dk · 5d

@bun.sh & @jarredsumner.com as part of landing Node-API support into Hermes & React Native, I want to build a pure ECMAScript (no Node.js runtime APIs) conformance test suite for Node-API implementors to test against. Is this something you'd be interested in adopting, collaborating on or sponsor?

Kræn Hansen @kraenhansen.dk · 5d

This is cool 'n all 😎
What prompted you to start this? 🤔

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Reposted by Kræn Hansen

React Universe Conf | Sept 2-4, 2025 @reactuniverseconf.com · 12d

Node-API in React Native means cross-runtime, type-safe, and faster React Native development. @kraenhansen.dk (@MongoDB) shows how Node-API brings faster builds, fewer native module failures, and better testing.
▶️ youtu.be/Wco3uHxik8w

Bringing Node-API to React Native | Kræn Hansen at React Universe Conf 2025

YouTube video by Callstack

youtu.be

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Kræn Hansen @kraenhansen.dk · 13d

👌

Kræn Hansen @kraenhansen.dk · 17d

Anyone exploring #reactnative and #kotlin multi-platform interop? Searching reactnative.directory yield no results 🤔

Kræn Hansen @kraenhansen.dk · 18d

Normally I wouldn't want to orchastrate a flash mob, but the TS team decided to add their "Awaiting More Feedback" label to the issue: Which means they'd like to hear from more people who would be "helped by this feature"

Kræn Hansen @kraenhansen.dk · 18d

Want to use the new Strict TypeScript API for #reactnative you might want to upvote github.com/microsoft/Ty... to help unblock github.com/facebook/rea... 🤞

Fail resolution when custom condition explicitly maps specifier '.' to null · Issue #62439 · microsoft/TypeScript

Demo Repo https://github.com/kraenhansen/typescript-issue-62439 Which of the following problems are you reporting? Something else more complicated which I'll explain in more detail Demonstrate the ...

github.com

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Kræn Hansen @kraenhansen.dk · 22d

That being said ... It has a lot of dependencies 😬 github.com/bluesky-soci... ... Let's queue up those upstream PRs 😅

github.com

Kræn Hansen @kraenhansen.dk · 22d

Listening to this again today. Perhaps someone from our community (@jayz.us - I'm looking at you and @jamon.dev) ... should try to build a @bsky.app desktop app? 🖥️🖱️ Seems like a great use-case for Legend List as well 💙 (just sayin')

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Kræn Hansen @kraenhansen.dk · 22d

Sounds like a good march for an NPM MCP server? 🤔

Kræn Hansen @kraenhansen.dk · 23d

I'm curious if you have plans to integrate this with smelter.dev 🙂 I would be great to have a potential integration documented on smelter.dev/fundamentals... 🤞

Smelter: Real-time video compositing software

Low-latency video compositing tool with seamless developer experience. Use it for live streaming, broadcasting, video conferencing and more.

smelter.dev

Kræn Hansen @kraenhansen.dk · 25d

habits 💙 use them for good

Kræn Hansen @kraenhansen.dk · Sep 9

Very important context indeed 👆