This Week In React 229

React Conf, React Router, Next.js Adapters, Redwood, Apollo, Fastify, Vite, Waku | RN v0.79, Deep Imports, Builder Bob, Fingerprinting | TC39, Tailwind, Rspack, Rstest, Turborepo, Bun

Apr 11, 2025

Hi everyone!

This week, I'm excited to introduce 2 new contributors to help me with the newsletter!

Tomasz and Kacper from Software Mansion here – you may already know us from libraries like Reanimated or Gesture Handler. We're happy to be among the authors of the This Week in React newsletter!

We were about to call it a fairly calm week… until React Conf 2025 was officially announced and React Native 0.79 dropped with Swift-compatible native modules for iOS, faster app startup on Android, and many more. Let's dive in!

As always, thanks for supporting us on your favorite platform:

🦋 Bluesky
✖️ X / Twitter
👔 LinkedIn
👽 Reddit

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⚛️ React

React Conf is back for 2025

The React conference is happening on October 7-8, 2025 in Henderson, Nevada, 🇺🇸 US. It’s where the React & React Native team shares official announcements live.

The only way to attend the conference in person is to win a ticket lottery that lets you purchase up to 2 tickets. Fortunately, if you’re not one of the lucky ones, the event will be livestreamed for free.

💸 Product for Engineers - Good taste makes great products: Simple design principles every engineer should know
📣 The Future of Redwood Launches Today: The former project gets renamed to Redwood GraphQL and enters maintenance mode. RedwoodSDK is the new path for the framework under new leadership.
💬 Next.js RFC – Deployment Adapters API: Vercel plans to support adapters to deploy Next.js to any hosting provider.
🐦 Tanner Linsley – TanStack Router `intent` preloading will predict where your users cursor will go
🔐 React Router and the Remix’ed path: Vulnerability discovered affecting both React Router and Remix, a flaw for a potential DoS attack through cache poisoning.
📜 React for Two Computers: Dan Abramov expands on his React Conf talk with fresh insights to help you build a solid mental model of React Server Components and their origins.
📜 Advanced React in the Wild: A great case study outlining 5 companies that have significantly improved the performance metrics of their React & Next.js sites and how they did it.
📜 React & live streaming: How to include video mixing in your app. A short tutorial explaining how to mix live video with React syntax and stream the output directly from the browser.
📜 Why We Moved off Next.js: Quick feedback from the Documenso project, moving from Next.js App Router to Vite and React Router.
📜 React.memo Demystified: When It Helps and When It Hurts: A concise explanation of common misconceptions and hidden pitfalls of memoization.
📜 React Reconciliation: The Hidden Engine Behind Your Components: Practical guidelines and clean architecture tips to ensure best performance with React reconciler
📜 Why you need a custom context provider: A nice interactive article that shows creating a custom Context Provider wrapper component can reduce un-necessary re-renders.
💸 Supabase breaks the norms of traditional software architecture. Learn how.
📦 React Router 7.5 – new route.lazy API: Allows for more granular lazy loading.
📦 Cloudflare Vite Plugin 1.0: Brings official support for React Router v7. Leverages Vite v6 Environment API so that your local dev server matches the production Cloudflare Workers runtime.
📦 Fastify React 1.0: This new package might help you assemble your custom React meta-framework based on the Fastify web server and Vite (creating your own “Mini Next.js”). It supports React 19, and RSCs will come later. See also the related launch post (React Server Confusion) which also gives a good overview of the state of RSC support outside Webpack.
📦 Apollo Client Next.js integration: The experimental GraphQL client integration package is now officially stable, including a new implementation for PreloadQuery to help you avoid request waterfalls. Apollo Client v4 is now in alpha, and integration packages for React Router / TanStack Start being worked on.
📦 Waku 0.22 – Announcing API routes
📦 Astro 5.6 – Global astro:env and experimental sessions on Cloudflare, experimental cookie-less sessions
📦 Hydrogen – March 2025 release – Support for Vite 6, turn on Remix v3_routeConfig flag 6
🎥 Theo – A breakdown of style solutions for 2025
🎥 Youssef Benlemlih – The Magic Of Compound Components in React

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📱 React-Native

React Native 0.79 – Faster tooling and much more

Recently, the React Native core team switched to more frequent release cycles, so this is a smaller release, but nonetheless exciting in terms of performance improvements. Here are the highlights:

Metro: 3x faster cold startup and package exports support
JavaScriptCore (JSC) moving to a Community Package
iOS: Swift-Compatible Native Modules registration
Android: Faster app startup thanks to skipping the JS bundle compression
Removal of Remote JS Debugging