This Week In React 258: ⚛️ - TanStack - Next.js - ImGui - next-intl - React-Email - Ink - React Router 📱 - Valdi - IntersectionObserver - Nitro libs - Radon - Lynx - WebGPU - Audio API 🍿 Read/subscribe: thisweekinreact.com/newsletter/258 Enjoy 👋

👀 React <ErrorBoundary> on v19 A subtle but interesting behavior change is explained here Seems like now it will "fail-fast" and bail out on the first error, while previously it "aggregated" errors andrei-calazans.com/posts/react-...

React dev using useEffect:

TIL about the JS "Declarations in Conditionals" proposal This lets you write const/let inside if/while block Curious, would you use this? I think I like it, could make code slightly less verbose and still explicit (TC39 stage 1, will be presented for stage 2 next week) github.com/tc39/proposa...

All React apps

👀 React Suspense for CPU-intensive tasks We've heard about it a long time ago, and the API has recently been refined as a simple "defer" boolean prop. 🚧 Not ready for prime time, but it should be in the next experimental channel release github.com/facebook/rea...

The React core team when they see devs using useEffect

This Week In React 257 - 🤝 Armand & I 🍿 Read: thisweekinreact.com/newsletter/257 ⚛️ - Navigation API - Partial Pre-Rendering - Directives - Micro-frontends - Storybook - Immer 📱 - Godot - Uniwind - Critical DevServer vulnerability 🚨 - GPU - iOS filters - Windows - Hermes

This Week In React 257 - 🤝 Armand & I 🍿 Read: thisweekinreact.com/newsletter/257 ⚛️ - Navigation API - Partial Pre-Rendering - Directives - Micro-frontends - Storybook - Immer 📱 - Godot - Uniwind - Critical DevServer vulnerability 🚨 - GPU - iOS filters - Windows - Hermes

The React core team when they see devs using useEffect

👀 Navigation API will be available in all browsers soon 🎉 Completely redefines the APIs used to build client-side routers / SPAs 🫤 History API: popState, link click.preventDefault() ... ✅ Navigation API: clean, centralized way to intercept navigation events 👌

The Navigation API is also in Firefox 146 nightly This is going to be available everywhere soon 🎉

👀 Remix published their event/interaction package Nicely composable API, not coupled to any framework I like its built-in/custom interaction system, which could help remove event-related state/complexity from your UI components Wonder if this makes sense to use with React?

ECMAScript excitement 😉 Congrats to @manishearth.bsky.social on unflagging TC39 Stage 3 Temporal in V8 today. Heading for Chrome 144 🎉 By many metrics this new date-time API is the single biggest change to JS ever 🔥 V8 uses Boa's temporal_rs by @jason-williams.co.uk Kevin Ness & Manish 👍

Looks like this is becoming part of the TS api surface cc @tkdodo.eu @acemarke.dev ? github.com/DefinitelyTy...

Firefox just unflagged support for CSS @ scope 🎉 Soon available in all browsers

Chrome 143 beta is upgrading Intl API / ICU I was wondering: isn't this kind of change likely to produce React hydration mismatches? I mean, SSR and client-side React must render the exact same formatted values 🤷‍♂️ Node/Browser ICU may not be in sync

Directives are String literals according to the spec They are just a special kind of string literals (I'm not against the usage of directives, just want to clarify my disagreement)

This Week In React 256 - 🤝 @filipkaminski.com @piaskowyk.bsky.social 🍿 Read/subscribe: thisweekinreact.com/newsletter/256 ⚛️ - Next.js / Cache Components - Directives drama - TanStack - Storybook - Waku - shadcn - Rari 📱 - React Navigation - Expo / EAS - Gesture Handlers - Screens - Nitro Enjoy!

This Week In React 256 - 🤝 @filipkaminski.com @piaskowyk.bsky.social 🍿 Read/subscribe: thisweekinreact.com/newsletter/256 ⚛️ - Next.js / Cache Components - Directives drama - TanStack - Storybook - Waku - shadcn - Rari 📱 - React Navigation - Expo / EAS - Gesture Handlers - Screens - Nitro Enjoy!

This Week In React 255: ⚛️ - Next.js - RSC - shadcn Field - TanStack - 3D / XR - Fumadocs 📱 - Solito - iOS header items - Bottom Tabs - MMKV - ImGui 🍿 Read/subscribe: thisweekinreact.com/newsletter/255

This Week In React 255: ⚛️ - Next.js - RSC - shadcn Field - TanStack - 3D / XR - Fumadocs 📱 - Solito - iOS header items - Bottom Tabs - MMKV - ImGui 🍿 Read/subscribe: thisweekinreact.com/newsletter/255

This Week In React 254 - 🤝 @kacperkapusciak.bsky.social @piaskowyk.bsky.social 🍿 Read/subscribe: thisweekinreact.com/newsletter/254 ⚛️ - Next.js 16 beta - Remix 3 preview - Compiler - Async React - TanStack - Cloudflare - Hook Form 📱 - VirtualView - DevTools - Harness - Audio - Screens - Radon

If you are curious, here's what a Remix v3 component looks like

This Week In React 254 - 🤝 @kacperkapusciak.bsky.social @piaskowyk.bsky.social 🍿 Read/subscribe: thisweekinreact.com/newsletter/254 ⚛️ - Next.js 16 beta - Remix 3 preview - Compiler - Async React - TanStack - Cloudflare - Hook Form 📱 - VirtualView - DevTools - Harness - Audio - Screens - Radon

Firefox now supports view transitions, the command and commandfor HTML attributes, and the moveBefore() method. www.firefox.com/en-US/firefo...

React vs Remix - Do we really want to move back to imperative re-renders? As far as I remember, we already tried that See, for example, this BackboneJS counter

TIL that HTML has an <output> tag for years 😅 Useful for semantic and accessibility Here, the example is a simple addition But it's also useful for async dynamic results computed on the server using modern frontend frameworks like React

This Week In React 253 - Special React Conf 🍿 Read/subscribe: thisweekinreact.com/newsletter/253 ⚛️ - Compiler 1.0 - React Foundation - <ViewTransition> - <Fragment ref> - useEffectEvent - <Activity> 📱 - RN 0.82 - Hermes V1 - DOM APIs - Vega OS - Keyboard Controller - IAP - Skia

This Week In React 253 - Special React Conf 🍿 Read/subscribe: thisweekinreact.com/newsletter/253 ⚛️ - Compiler 1.0 - React Foundation - <ViewTransition> - <Fragment ref> - useEffectEvent - <Activity> 📱 - RN 0.82 - Hermes V1 - DOM APIs - Vega OS - Keyboard Controller - IAP - Skia

Just announced at React Conf - New React API available in canary: 🔥 <ViewTransition> 🔥 <Fragment ref> Particularly excited for Fragment Refs, exposing platform-specific APIs such as: - addEventListener() - observeUsing() - focus() - getClientRects() - scrollIntoView()

Introducing the React Foundation

This slide summarizes well all the new things in React And what to look forward to! Also, React Compiler is now 1.0!

Just announced at React Conf - New React API available in canary: 🔥 <ViewTransition> 🔥 <Fragment ref> Particularly excited for Fragment Refs, exposing platform-specific APIs such as: - addEventListener() - observeUsing() - focus() - getClientRects() - scrollIntoView()

Why is no one posting React memes anymore? I need some fun things to feature in my newsletter, preferably related to the current week's news!

ESLint v10.0.0 is coming! Check out our latest blog post for what to expect. https://eslint.org/blog/...

React Conf starts tomorrow!

<Activity> - The most exciting React feature just came out! Hide a React subtree and unmount its Effects while preserving its state, and keep rendering it with lower priority. Unlocks very exciting pre-rendering patterns along the way! More Activity modes are coming

React 19.2 is now available! This release includes Activity, useEffectEvent, React Performance Tracks, partial pre-rendering, and more: react.dev/blog/2025/10...

This Week In React 252 - Entering a very exciting month for React! Read/subscribe: thisweekinreact.com/newsletter/252 ⚛️ - React 19.2 🔥 - Activity - useEffectEvent - Compiler - Astro - StyleX - Docusaurus 📱 - Vega OS - Voltra - NativeScript - Expo Router - NativeWind - Lynx - Maestro

Who's coming to React Paris this year? Hope to see you there 👋

Open source tip Want to know who's using your project? Just release a bug that makes it totally unusable! 😜

💥 Docusaurus 3.9 is out! 💥 🆕 Algolia DocSearch v4 - Ask AI 💪 i18n improvements 💅 Mermaid ELK layouts ⬆ Node 20 🐛 Many bug fixes and improvements Release post: docusaurus.io/blog/release...

This Week In React 251 - By @tboba.pl & @piaskowyk.bsky.social 🍿 Read/subscribe: thisweekinreact.com/newsletter/251 ⚛️ React - TanStack Start 1.0 RC - React Router RSC - React ESLint plugins - Vite - <ViewTransition> 📱 RN - Nitro Modules/Fetch - Live Activity - localStorage - Workflows TestFlight

This Week In React 251 - By @tboba.pl & @piaskowyk.bsky.social 🍿 Read/subscribe: thisweekinreact.com/newsletter/251 ⚛️ React - TanStack Start 1.0 RC - React Router RSC - React ESLint plugins - Vite - <ViewTransition> 📱 RN - Nitro Modules/Fetch - Live Activity - localStorage - Workflows TestFlight