This Week In React #157: Concurrent Mode, Gatsby, hydration, useMemo, React-Redux, Fresh, TinyBase, TFLite, Bootsplash…

Hi everyone!

It’s been pretty quiet on the React front this week, but we’ve still got a few nice articles to read.

On the React-Native side, Marc Rousavy is on fire, publishing a number of packages that seem to herald the imminent arrival of VisionCamera v3.

We should have some nice releases soon, like 🐦 Bun 1.0, 🐦 Astro 3.0 and 🐦 TanStack Router.

I’m taking a short break next week, so I’ll see you on 6 September 👋

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⚛️ React

The underlying mechanisms of React’s concurrent mode

A quite technical but greatly educational article that study the React codebase. Explains well how startTransition works and how it differs from the synchronous rendering mode. I learned how React uses the MessageChannel API recursively to periodically hand over to the main thread.

• 💸 Zero To Shipped – Master Fast-Paced Fullstack Development and Finally ship that product
• 🐦 Is Gatsby Dead?: not officially, but its future does not look super promising.
• 🎮 React Jam – Summer 2023 Winners: the React-based video games creation challenge for which I was a member of the jury, just announced the winners.
• 📜 Implement Radix’s asChild pattern in React: explains how the asChild pattern, popularised by Radix, works as a good alternative to the as props for customising the underlying component.
• 📜 A11y-Driven Development: interesting proposal to split and name React components according to their accessibility role.
• 📜 React Suspense in three different architectures: presents 4 different use cases for 3 different architectures (CSR, SSR, RSC).
• 📜 How to solve hydration error in Next.js: highlights some common problems that can lead to hydration problems, such as using browser APIs like localStorage to initialise your state, or using an invalid HTML markup.
• 📜 Using PostHog with the Next.js App Router and Vercel
• 📜 useMemo overdose
• 📦 RSC Devtools – Chrome Extension: the unofficial extension is now available in the Chrome store. It lets you navigate and analyse a timeline of RSC payloads over time. Read the article Devtools for React Server Components for details.
• 📦 Fresh 1.4 – Faster Page Loads, Layouts and More
• 📦 TinyBase 4.1 – New ui-react-dom module
• 📦 NextUI 2.1 – Select, Listbox, ScrollShadow
• 📦 React-Redux 9.0 alpha
• 🎥 tRPC + NextJS App Router = Simple Typesafe APIs
• 🎥 Remotion Lambda – Tutorial Playlist
• 🎥 React Query is Secretly an Amazing State Manager

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📱 React-Native

• 💬 React-Native RFC – Autolinking local modules: proposes to make it easier to create local native modules, in a local_modules folder, using the create-react-native-library CLI.
• 💬 React-Native-Testing-Library RFC – Jest Native matchers migration
• 🐦 The top 100 Sports apps in the Apple App Store – React-Native 33/100
• 👀 Expo Preview – Static Font Optimization with Expo Router
• 📜 Simplify Your iOS Brownfield Integration with React Native Host
• 📦 react-native-worklets-core: a standalone worklet runner, inspired by the one in Reanimated 2+, and designed to be used by various libraries such as VisionCamera, WishList and Skia.
• 📦 react-native-fast-tflite – High-performance TensorFlow Lite with GPU acceleration
• 📦 Realm JavaScript v12: complete rewrite without surprises
• 📦 react-native-bootsplash 5.0.0 – Dark mode, Brand image, Web support…
• 📦 clean-rn – Clean all React Native caches
• 🎥 Instagram Stickers – “Can it be done in React Native?”
• 🎥 Flutter vs React Native and Reanimated with @Reactiive
• 🎙️ React Native Radio 273 – Gluestack with Sanket Sahu
• 👥 React Native EU 2023 (Wrocław, September 7–8, 2023) is offering us -15% on conference tickets with code “thisweekinreact15”.

🔀 Other

• 👀 Upcoming Node 20.6 – built-in .env file support
• 🐦 requestIdleCallback coming to Safari and soon in every browser?
• 📜 Array vs T[]: Which is better?
• 📜 Shadow DOM: Not by Default
• 📜 Dropbox – How we reduced the size of our JavaScript bundles by 33%
• 📜 Four new CSS features for smooth entry and exit animations
• 📜 The ideal viewport doesn’t exist
• 📜 TypeScript is Surprisingly OK for Compilers
• 📦 Chrome 117 Beta

🤭 Fun

See ya! 👋