Forem: Sebastien Lorber

This Week In React #275 : ⚛️ Next.js, TanStack RSC, React Compiler | 📱 ExecuTorch, Unistyles| 🔀 Pretext, Axios, Node

Sebastien Lorber — Fri, 03 Apr 2026 12:51:32 +0000

Hi everyone, Seb and Jan here 👋!

This week, we have news about popular React meta-frameworks. Next.js Adapters API should help host it anywhere without compromise. TanStack Start unveils a preview of its React Server Components. The React Compiler port to Rust is being actively worked on.

No major announcement in the React Native world, but still many interesting releases. React Native v0.85 should be released next week.

Axios has been compromised in a major supply chain attack. Stay safe and make sure to adopt security best practices!

Let's dive in!

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⚛️ React

Next.js Across Platforms: Adapters, OpenNext, and Our Commitments

Next.js 16.2 now ships with a stable, typed, versioned Adapter API. It was built in collaboration with many partners: OpenNext, Netlify, Cloudflare, AWS Amplify, and Google Cloud. This helps ensure Next.js works well on every platform across all its features. There’s now a public test suite to verify your adapter, and Vercel also relies on it.

The Next.js Ecosystem Working Group explains Vercel’s commitment. Partners will not participate in Next.js design decisions and roadmap, but can still impact it through feedback. They will be kept in the loop early, have time to adapt, and get direct support to fix adapter breakage.

🎥 TanStart Start RSC preview

Tanner Linsley gave a talk at React Paris last week. The 2nd part unveils for the first time what React Server Components will look like in TanStack Start, to be released very soon.

My highlights:

Primitives: You have full flexibility to decide how to compose these RSC APIs, and can adopt them incrementally. RSC flight payloads are just streams of text; you can sync/cache/persist/manipulate these on your own terms.
Composite Components: You don’t need ’use client’ directives, although they are supported. This new concept creates an explicit boundary between the server and the client. I assume it should be possible to co-locate client/server components in the same file.
No Server Actions: A design decision for security reasons, but you can use server functions with validation.

What strikes me is just how different this is from Next.js. It feels more like a library than a framework, and it seems more in sync with the philosophy that initially attracted me to React: you make your own decisions, even though sometimes more flexibility means more glue code and ways to shoot yourself in the foot. In any case, I agree with Tanner: we deserve another React meta-framework—one that’s less opinionated and innovates in a different direction.

💸 Lingui - Lightweight, developer-first i18n tooling for modern product teams
👀 React Compiler PR - WIP port of React Compiler to Rust - As previously announced, the React Compiler is being ported to Rust through AI. The algorithm is the same, based on a Rust-based Babel AST, already passing 100% of the Babel integration fixture tests. The goal is to integrate nicely with Babel, SWC, and OXC.
👀 React PR - Enable Trusted Types integration - The browser Trusted Types API is now Baseline Newly Available, and React now integrates with it to prevent XSS and force you to sanitize unsafe inputs. For example, with dangerouslySetInnerHTML={{__html: policy.createHTML(text)}}.
👀 Next.js PR - experimental.useOffline with retries + hook to show offline indicator
👀 TanStack Query ESLint PR - Add prefer-query-options rule
🗓️ dotJS 2026 - 🇫🇷 Paris - 18 September - Early bird tickets are available until April 14th 6 PM CET, save 100€ on the next price. dotJS comes with dotAI on September 17, book now your early bird ticket for each conference, or a combo to attend both.
📜 TanStack Router's New Reactive Core: A Signal Graph - They refactored the router state store, splitting it into many small stores using signals, leading to more efficient fine-grained subscriptions. The original router.state is still a public API, but now derived from the smaller store.
📜 When Do You Really Need startTransition? - When an update triggers expensive rendering.
📜 Hoistable SVG Defs in React - How to colocate SVG <defs> with components instead of centralizing them.
📜 Making React ProseMirror really, really fast
📜 Build your own shimmer skeleton that never goes out of sync
📜 How Does React Fiber Render Your UI
💸 Product for Engineers - WTF does a product manager do? (and why engineers should care)
📦 Inertia 3.0 - Build React/modern SPAs with server-based routers - This solution to integrate React and other frontend frameworks with traditional backends (optimized for Laravel) now comes with a Vite 8 plugin, SSR in dev, optimistic updates, and more.
📦 TanStack DB 0.6 - Persistence, Offline Support, and Hierarchical Data
📦 Astro 6.1 - Improved image optimization, markdown config, expose i18n fallback routes

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📱 React-Native

RN ExecuTorch 0.8

Software Mansion just dropped the biggest release to date for React Native ExecuTorch. Version 0.8 expands the library's capabilities far beyond its initial scope, introducing official support for bare React Native applications (no longer strictly tied to Expo) and deep integration with Vision Camera.

Key callouts:

Vision Camera Integration: You can now seamlessly run ExecuTorch models directly on camera frames in real-time.
New Computer Vision Models: The release introduces powerful new CV hooks, such as useInstanceSegmentation and useSemanticSegmentation.
Bare RN Support: You can now use ExecuTorch in bare React Native apps by utilizing the bare React Native resource fetcher instead of the Expo one.
Expanded NLP: Continues to grow its Natural Language Processing suite with implementations for Speech-to-Text, Text-to-Speech, Text Embeddings, and more.

💸 Make React apps fast where it actually matters. Learn how to diagnose real bottlenecks and fix slow, janky React apps using modern React 19 patterns.
👀 Lynx Vue - Vue + Lynx = Vue Native? An AI-powered attempt to bridge native development with a popular framework.
🗓️ App.js Conf - 🇵🇱 Kraków - 27-29 May - Join Charlie Cheever, William Candillon, Jay Meistrich, Perttu Lähteenlahti, and more! Prices increase in May—secure your seat now. Get a 15% discount with code "TWIR".
📜 Fig case study - How five engineers can scale to millions of users with Expo to provide crucial info about dietary needs. 📦 Preflight - Simplify Maestro E2E testing for React Native - deep link to any screen, inject state, compare visual regressions with reports, router agnostic.
📦 Fast Confetti 2.0 - Rewritten composition API and physics engine, more customization and natural feeling animations.
📦 ReactNative.run - Run React Native in a browser, Metro bundler mapped to the web. Similar concept to Expo Snack.
📦 Agent Device 0.11 - iOS Simulator no longer takes focus from the current window + lots of fixes and small features
📦 Brownie 3.5 - Shared-State Workflow for Brownfield now with Android support.
📦 Reshuffled 0.2 - Nitro-powered grid layout - onDragEnd worklet callbacks
📦 Reactotron 3.9 - MCP server integration
📦 React Native Header Motion 1.0 - New context-first header API, explicit navigation bridging, better performance
📦 Unistyles 3.2 - Add support for dropShadow, Suspense trees, RTL ShadowTree updates on Android
📦 Morph Card - Native card-to-modal morph transition
🤖 Software Mansion skills - Best practices, AI skills for animations, gestures, SVG, and libraries maintained by SWM.
🤖 React Navigation AI skills - Official guidelines that help with migration to newer versions and static config.
🤖 Codex plugins for React Native development - Build and test RN apps in Codex.
🎥 William Candillon - React Native WebGPU in 100 seconds
🎥 Beto - react-i18next in React Native & Expo
🎙️ React Native Radio 358 - React Native for Meta Quest Part 2: Developer Friendly

🔀 Other

⚠️ axios Compromised on npm - Malicious Versions Drop Remote Access Trojan - axios@1.14.1 and axios@0.30.4 have been compromised for approximately 4 hours on 30 March, and you might have too if you installed dependencies during that time frame. Even if you don’t use it directly, it’s probably a transitive dependency in your projects. Make sure to follow the defensive measures, such as adding min-release-age=7d to your .npmrc.
📜 Signals, the push-pull based algorithm
📦 Pretext - Text measurement and layout algorithm in pure TypeScript - This innovative lib went viral this week, with fun/impressive but useless demos everywhere. However, the lib unlocks real new possibilities that are impossible or inefficient to achieve with DOM/CSS, as explained in this related article: You're Looking at the Wrong Pretext Demo.
📦 Chrome 147 - Element.startViewTransition() - The first browser to ship element-scoped view transitions, enabling multiple view transitions to run simultaneously.
📦 Playwright 1.59 - Screencast recording, observability for agents, await using - New features that could be helpful to give feedback to AI agents, and post review videos in PRs.
📦 Turborepo 2.9 - 96% faster with agents, sandboxes, and humans
📦 Transformers.js 4.0 - Machine Learning for the web - New WebGPU backend
📦 Node.js 25.9 - Test runner module mocking improvements, using + AsyncLocalStorage, stream/iter API

🤭 Fun

See ya! 👋

This Week In React #274 ⚛️ Next.js, React Router, Storybook, HeroUI| 📱 Reanimated, Worklets, Nitro Fetch, Navigation | 🔀 TypeScript, Signals

Sebastien Lorber — Fri, 27 Mar 2026 13:58:11 +0000

Hi everyone, Seb here 👋!

This week: a new Next.js release, a React Aria-based UI library, Remotion updates, Storybook MCP, and more.

On React Native, multi-threading keeps improving (Worklets, Reanimated), and React Navigation v8 looks close.

Sorry for the weird duplicate email last week, just a mistake 😅

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⚛️ React

Next.js 16.2

A great minor release that comes with significant performance improvements, but also impactful DX improvements and new interesting features:

~400% faster next dev startup
~50% faster rendering thanks to a React core RSC contribution
Redesigned error page
Server Function logging in dev
next dev --inspect to attach a Node.js debugger
Link transitionTypes
Dev Overlay now renders Error.cause and a hydration diff indicator to identify client/server
Many new experimental features
AI improvements: generates AGENTS.md to read versioned docs for agents, browser log forwarding, agent devtools CLI.
Turbopack improvements: Faster builds, Server Fast Refresh, tree shaking of dynamic imports, PostCSS config, Subresource Integrity, inline loader config, and more.

Related resources:

📜Implementing Next.js 16 'use cache' with next-intl Internationalization - Recently updated to include usage of the new experimental.rootParams feature, letting cached components read the locale directly instead of receiving it as a prop.
📜 Error Handling in Next.js with catchError - This new unstable_catchError() API is a framework-aware alternative to react-error-boundary that discards Next.js control flow errors and can refetch RSC data.
🎥 Ankita Kulkarni - Next.js 16.2 Just Changed AI Coding Forever

💸 Product for Engineers - WTF does a product manager do? (and why engineers should care)
📜 Start naming your useEffect functions, you will thank me later - Advocates for giving an inline name to Effect functions to convey your intent, even if it’s encapsulated within a custom hook. If you can’t find a decent name, maybe the Effect does too much or should not exist.
📜 use(): The Hook That Breaks the Rules (On Purpose)
📜 Test IDs are an a11y smell
📜 Type Safety in React Router
📜 Post-React Compiler React Coding Guide (For AI Agents)
💸 Sentry - Why your Next.js stack traces point to random chunks (and how to fix it)
📦 React Router 7.13.1 & 7.13.2 - Recent patches introduced new unstable APIs such as the getRequest() API for RSCs, and a future flag to access “pass-through” (un-normalized) Request objects. The <Link unstable_mask> makes it easier to implement URL masking, letting you replicate Instagram-like UX: open gallery images in a modal, and render them full screen on refresh.
📦 HeroUI 3.0 - We usually don’t feature most UI libraries, but this one, based on React Aria and Tailwind, has been cooking for a while, and looks more polished than the average UI lib. Although it’s not a cross-platform abstraction, it offers a React Native variant using similar composition patterns and design tokens.
📦 Storybook 10.3 - MCP, Vite 8, Next.js 16.2, ESLint 10 - There’s a dedicated article on the Storybook MCP for React.
📦 Lucide Icons 1.0 - Quite popular icon solution in React and shacn/ui.
📦 Lexical 0.42 - Extensible text editor framework from Meta
📦 Hiraki - Zero-dependency React drawer component
📦 json-render Ink - Generative UI for the terminal, comes with 27 React components
🎥 Jonny Burger - Remotion is getting even better! - Cool features landed recently in the React video creation tool, such as Light Leaks, Sound Effects, Rspack, and AI-related improvements. Let’s not forget the integration with Vercel Sandbox: I wouldn’t be surprised if we could soon fully vibe-code videos directly in the cloud.

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📱 React-Native

Worklets 0.8 - Shareable, Bundle mode improvements

It’s now easier to use the Bundle mode, which unlocks running more complex things in background threads. Also read the dedicated article on Shareable – shared memory's missing piece, a runtime-bound shared memory primitive that was extracted from Reanimated, and that you can now use for non-animation use cases too!

💸 Make React apps fast where it actually matters. Learn how to diagnose real bottlenecks and fix slow, janky React apps using modern React 19 patterns.
🔐 Glassworm Strikes Popular React Native Phone Number Packages in Supply Chain Attack - Affects react-native-country-select and react-native-international-phone-number.
📜 Glow Effect on TextInput with Reanimated CSS Animations
📜 From skeptic to convert: how Fieldy adopted Expo for their AI wearable
📦 Reanimated 4.3 - CSS animations for SVG, Shared Values on multiple threads, typesafety
📦 React Navigation 7.17 - New .with() method on static config to add a wrapper around the navigator - Also available in v8.alpha. React Navigation wants us to use the Static API more. It unlocks automatic type inference and deep linking, and yet covers most dynamic use cases.
📦 React Native Navigation SDK - TIL that Google provides an official React Native library for Google Maps (in beta).
📦 Swift 6.3 - C interop, module selectors, Swift Build preview, Android SDK, and more
📦 Nitro Fetch 0.2 - Add support for Streaming, formData, AbortController, RN 0.85
📦 React Native Windows 0.82 - New-Architecture only
📦 Rozenite 1.5 & 1.6 - DevTools for AI Agents, new File System plugin
📦 MMKV 4.3 - MMKV upgrade, compareBeforeSet optimization, configure default log level at build time
📦 Uniwind 1.6 - Border curve utilities
📦 Detox 20.48-50 - Support simulator launch --arch, liquidGlass overlay
📦 Agent Device 0.10 - Can control macOS apps
🎥 Beto - React Navigation v8 Crash Course — Liquid Glass, Tabs & More
🎥 notJust.dev - State of React Native - What's new in 2026
🎙️ RNR 357 - React Native 0.82–0.84 & Expo 55

🔀 Other

📜 Fix Flaky Jest Tests in CI with maxWorkers (and why it works) - Tests parallelization can lead to timeouts, but you can fine-tune parameters to reduce test time and flakiness.
📜 Who Is Responsible for AI-Generated Code? - Will Node.js ban AI-generated code from its core, even when there’s a human in the loop?
📜 The Three Pillars of JavaScript Bloat
📦 TypeScript 6.0 - A “bridge” release toward the 7.0 Go rewrite, which is almost complete. This release also changes defaults (strict: true, types: []...), improves subpath imports, adds types for Temporal and upsert, and more.
📦 Mixed Signals - Bridging the Server-Client Boundary with Signals - The Preact team is working on a new transport-agnostic solution in which the reactive signal graph spans the network boundary.
📦 Edge.js - Running Node apps inside a WebAssembly Sandbox
📦 Zero 1.0 - Sync engine is now stable e
📦 ArrowJS - UI framework for the agentic era
📦 Valibot 1.3 - Smarter pipelines, result caching, and new validators

🤭 Fun

See ya! 👋

This Week In React #273 : ⚛️ RedwoodSDK, Next.js, TanStack, RSC | 📱 Expo UI, Ease, Expo APIs, Keyboard | 🔀 TC39, Temporal, Vite

Sebastien Lorber — Fri, 20 Mar 2026 14:28:51 +0000

Hi everyone, Seb and Jan here 👋!

This week, RedwoodSDK 1.0 dropped, and other meta-frameworks improved their SSR performance. A bunch of content related to Async React and the TanStack too!

On the React Native side, Expo UI support for Jetpack Compose is quite exciting. A new animation library could also be an interesting alternative to Reanimated CSS transitions.

Temporal has finally reached stage 4! We also have great announcements from the Vue.js conf that remain relevant for React developers, notably Vite 8.

Let's dive in!

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⚛️ React

RedwoodSDK 1.0

The former RedwoodJS meta-framework has pivoted to RedwoodSDK, and it now has its first stable release. This time, it bets on Vite, React Server Components, and Cloudflare (using Durable Objects for its useSyncedState() realtime feature). It promises explicit APIs for clarity (no convention, no magic behavior) through composable web-based primitives.

The choice of being tightly coupled to Cloudflare might surprise you, but they explain it in this article. They are building abstractions on top of Cloudflare Bindings and Durable Objects to become service-agnostic while remaining platform-optimized. Similarly, Evan You has recently announced Void.cloud – a Vite-native deployment platform based on Cloudflare – and explained that “the lock-in is what makes the DX possible”. Time will tell how this story compares to Next.js and OpenNext 🤪.

💸 PlanetScale - Faster apps start with a faster database. Get started with the fastest benchmarked Postgres and MySQL.
👀 Next.js PR - Update vercel/og and Satori - This greatly improves the performance of ImageResponse and unlocks new features.
🗓 React Paris - Workshop Day - 🇫🇷 Paris - 25 Mar. Deep-dive into React Query and/or nuqs with industry experts. Limited seats available — get 50% off with code "TWIR_WS".
📜 Why we rolled our own React Server Components framework - The Aha! engineering team built their own customizable RSC framework. The Vite RSC plugin absorbs much of the complexity. This article shows how you can do it too, and when it could make sense to do so.
📜 Why we banned React's useEffect - The Factory team chose to forbid direct usage of useEffect() through an ESLint rule, reducing bugs and complexity. Its usage often compensates for something React already gives better primitives for.
📜 Two React Design Choices Developers Don’t Like—But Can’t Avoid - Ryan Carniato explains why React defers state updates and has an effect dependency array. While designing Solid 2.0, he realized that the Async world has constraints that even signal-based frameworks need to take into consideration.
📜 React SSR Benchmark: TanStack, React Router, Next.js - A stress-test of popular React meta-frameworks that led framework authors to fix many performance bottlenecks.
📜 TanStack Start - 5x SSR Throughput after profiling SSR Hot Paths - Based on the benchmark above, the TanStack team explains the methodology used to uncover SSR bottlenecks and how they significantly improved the performance under heavy load.
📜 From Fiber to Async React - An interactive deep dive into React Async features.
📜 Making sense of 'key' prop in React - A refresher on why keys matter and how index or Math.random() can break state and reconciliation.
💸 Product for Engineers - The engineeringification of everything
📦 Next.js 16.2 - AI Improvements - Agents are asked to read versioned docs at node_modules/next/dist/docs/, browser logs can be forwarded to the terminal, Dev Server lockfile, and a new experimental agent DevTools CLI.
📦 Reveal.js 6.0 - Presentation Framework - New @revealjs/react integration package
📦 Base UI 1.3 - Drawer is stable, Label for Combobox/Select/Slider, and more
📦 Streamdown 2.5 - Inline KaTeX support, staggered streaming animations, and more
📦 AI Elements 1.9 - New JSXPreview to render incomplete JSX, agent skills, and more
📦 TanStack Query 5.91 - New environmentManager API
🕹️ Can’t Maintain - React Component API Game - A fun interactive quiz to teach you component API design lessons.
🎥 Alem Tuzlak - TanStack AI Just Got a Huge Upgrade: Generation Hooks, Lazy Tools, Realtime & Middleware - On the TanStack blog, you’ll find many updates about their AI packages. Not strictly about React, but you’ll learn about React-specific integrations such as a useRealtimeChat() that hides the complexity of connecting directly to a voice AI provider, or generation hooks that integrate nicely with TanStack Start.
🎥 Austin Davis - I Tried TanStack Form and I'm Not Going Back
🎙️ Syntax.fm 988 - Cloudflare’s Next.js Slop Fork

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📱 React-Native

Expo UI in SDK 55 - Jetpack Compose now available

Expo SDK 55 brings major updates to Expo UI, moving Jetpack Compose support to beta and refining SwiftUI APIs to match Apple's official conventions more closely. Instead of reimplementing native components in JavaScript, Expo UI exposes the native UI frameworks directly to React Native.

Jetpack Compose support: now includes enough Material Design 3 components (like LazyColumn, ModalBottomSheet, and DockedSearchBar) to build complete apps, which was validated by building a full Wikipedia clone.
SwiftUI: now it feels like SwiftUI: renamed and restructured SwiftUI components to match their SwiftUI counterparts. DateTimePicker is now DatePicker, Switch is now Toggle, and CircularProgress is now ProgressView.
Familiar API surface: It uses React's compound component pattern (e.g., ListItem.Leading) to express Compose's composable lambdas in JSX, and aligns the modifier system so it works consistently across platforms.
AI-Friendly: Because the APIs intentionally mirror native Compose and SwiftUI documentation, AI assistants can easily generate correct Expo UI code relying on their existing native training data.

React Native Ease - Lightweight declarative animations powered by platform APIs

New animation library designed to handle simple transitions with maximum performance. While Reanimated is incredibly flexible, it runs JS on every frame on the UI thread, which can be overkill and cause flickering if the thread lags. react-native-ease solves this by leveraging Core Animation on iOS and Animator on Android directly, resulting in zero JS overhead.

CSS-like API: Offers a highly simplified, declarative API inspired by CSS transitions. You simply wrap elements in an <EaseView> component and pass an animate prop.
Built for the basics: Perfect for non-layout properties like opacity, transforms, background color, and border radius. It prevents the need to create hundreds of shared values just for simple press animations in lists.
AI Migration Skill: It includes an AI agent skill that can automatically scan your codebase, identify simple Animated/Reanimated implementations, and migrate them over to react-native-ease.

💸 Make React apps fast where it actually matters. Learn how to diagnose real bottlenecks and fix slow, janky React apps using modern React 19 patterns.
📜 The next generation of Expo APIs: MediaLibrary and Contacts - Following the Filesystem update, Contacts and Media Library are getting the new object-oriented API treatment. The use of Shared Objects and Shared Refs offers better performance and simpler querying through deeper native module integration.
📜 Handling Navigation in React Native Brownfield Apps - Navigation for brownfield apps can be tricky. @callstack/brownfield-navigation aims to simplify this process by wiring navigation in a clean, typed, and maintainable way.
📦 Keyboard Controller 1.2 - Chat Scroll View - Tackles layout thrashing during keyboard animations. This related article explains why Flutter and React Native suffer from the same keyboard animation stutter.
📦 Fast Flow Transform - Strip Flow types 20x faster than with Babel - This tool might help remove Babel entirely from your React Native pipeline and adopt a full Rust-based toolchain. Note that SWC is also working on Flow types stripping.
📦 React Native Sandbox 0.5 - Now supports Android - Allows you to run multiple, isolated React Native instances within a single application
📦 Agent Device 0.8.4 - Screenshot diff support - CLI tool for pixel-level image comparison.
📦 React Native Streamdown - Markdown streaming for React Native - Can render incomplete Markdown documents, useful for streaming LLM chats.
📦 React Native Reanimated DnD 2.0 - Drag-and-drop library using Reanimated 4 and Gesture Handler
📦 Vite Plugin RNW 0.0.11 - Vite 8 support for React Native Web
🎥 Simon Grimm - How to Build Smart TV Apps with React Native (Vega OS Guide)
🎥 Beto - This New React Native Animation Library Is Insane (Ease)
🎙️ Software Mansion Podcast 1 - AI Made 20 Years of Learning Obsolete in 2 Months – Simon Grimm x Tomek Zawadzki - SWM is launching its new React Native podcast, while Rocket Ship is taking a break.
🎙️ React Native Radio 356 - How Vercel Built the v0 App with React Native

🔀 Other

📣 TC39 Advances Temporal to Stage 4 Alongside Several ECMAScript Proposals - Great news for Temporal, being standardized in ECMAScript 2026. Import Text is also super useful and now stage 3.
📜 Temporal: The 9-Year Journey to Fix Time in JavaScript - From the origins of the Date API to the backstory of how Temporal got standardized. Remains to define how it will integrate with existing Web APIs, such as date inputs.
📜 Why Node.js Needs a Virtual File System - A node:vfs API should land as experimental in Node 24, and polyfills are already available for Node 22. Being able to load code generated at runtime can be quite useful!
📦 Vite 8.0 - Faster Rust-based Rolldown bundler - A major Vite release just dropped, based on the new unified Rust-based toolchain. The React plugin is also updated, and there’s a compatibility preset for the React Compiler.
📦 Vite+ Alpha - The Unified Toolchain for the Web - The Void0 company finally decided that it will be free and under MIT license.
📦 Oxlint JS Plugins Alpha - Oxlint is already compatible with many ESLint rules, including React hooks and React Compiler rules. What’s most interesting is how they achieve good performance thanks to the low-level “raw transfer” mechanism.
📦 Vitest 4.1 - Support for Vite 8, test tags, new aroundEach/All hooks, and more
📦 Bun 1.3.11 - Bun.cron, smaller on Linux, many bugfixes

🤭 Fun

See ya! 👋

This Week In React #272 : Astro, Compiler, Next.js, shadcn | Navigation, Expo Agent, Widgets, Activity | Node.js, Source Maps

Sebastien Lorber — Fri, 13 Mar 2026 14:18:57 +0000

Hi everyone! Filip and Tymek from Software Mansion here! 👋

Hope your week is going well 😄 In today's news, we bring you a slightly calmer React section, but there is much more going on in React Native. Astro 6.0 has been released, Expo announces an agentic platform and new SDK for observability and metrics, and React Navigation developers are planning to add a new way to load data in screens.

There's more — interesting canary PRs for Next.js, React Native Evals, TypeScript 6.0 RC announcement, new guides from Expo, and beyond!

Let's dive deep into the content 🎉

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Next.js Source Maps: From Random Chunks to Real Code

When Next.js builds your app, it compiles and minifies your code into chunks like static/chunks/12345-something.js. When errors happen, your stack traces point there. Not to the code you actually wrote.

This blog walks through how source maps and debug IDs wire things together, and how to configure Sentry to show real file names and line numbers in production.

What actually happens to your code during build
Why dev tools show readable traces but Sentry shows chunks
How to simulate a production build so Sentry gets your source maps
Troubleshooting missing or stale source maps

Read the guide ➡️

⚛️ React

Astro 6.0

Astro 6.0 is out with a redesigned dev server, built-in font optimization, live content collections, and stable CSP support. It requires Node 22+, Vite 7, and Zod 4.

Here's what's new:

Rebuilt on Vite's Environment API web server, so you now run your exact production runtime locally.
Built-in Fonts API - configure fonts from local files or providers like Google. Astro handles backbone logic, including downloading, caching, and preloading links.
Stable CSP support - with one config flag, Astro auto-hashes scripts and styles, and generates headers.
Experimental Rust compiler - drop-in replacement for the Go-based compiler with better performance and diagnostics via @astrojs/compiler-rs.
Experimental queued rendering and route caching.

To upgrade to the latest Astro version, all you need to do is execute npx @astrojs/upgrade - an interactive CLI will handle the rest.

💸 Product for Engineers - The hidden danger of shipping fast
👀 Next.js PR - Add Link transitionTypes prop - Calls React.addTransitionType for each type during navigation, making it easy to trigger custom View Transitions per link.
🐦 Joe Savona - "React Compiler: Rust edition is coming soon" - They are apparently porting the TypeScript-based compiler to Rust using AI.
📜 How state updates work internally - A detailed technical explanation of why setState doesn't update the value immediately. Walks through Fiber's linked-list hook storage and shows why setting state via function versus value behaves differently when called multiple times.
📜 Seven Years to TypeScript: Migrating 11,000 Files at Patreon - Documents Patreon's full frontend migration from JS to TS across 11,000 files and 1M+ lines of code, including old React conventions, patterns, and APIs (React Classes, PropTypes, HOC). The real work came in phases - building typed foundations first, then combining codemods and AI workflows.
📜 Cloudflare rewrites Next.js as AI rewrites commercial open source - A well-sourced summary of Cloudflare’s Vinext situation. It will likely take more than a rewrite to make it a viable solution.
📜 What Claude Code Actually Chooses - Analyzed 2,430 real Claude Code sessions across 20 tool categories. Depicts which React libs Claude picks, driving extra growth.
📜 Building Dynamic Forms In React And Next.js - Compares two approaches to complex forms: component-driven versus schema-driven (SurveyJS).
📜 React: Singletons aren't as evil as you think - Shows the better solution for the popular Singleton pattern in React by using the approach with TypedEvent and useSyncExternalStore.
📜 How to Access React Router Context with AsyncLocalStorage - Shows how to use Node's AsyncLocalStorage to store request-scoped data. Cleaner than prop-drilling through your whole route tree.
📜 React Compiler and Beyond: Capability Boundaries of Compiler-Driven UI Frameworks - A comparison between the React Compiler and Fict, a compiler-first framework that moves dependency tracking to compile time and propagates updates through a signal graph instead.
💸 Certificates.dev - React Docs Refresh: useActionState and useOptimistic by Aurora Scharff
📦 shadcn/cli 4.0 - Skills, presets, dry-run, diff, monorepo, updated primitives
📦 React Helmet Async 3.0 - React 19 support
📦 React Aria 1.16 - Multi-select ComboBox, Tree Sections
📦 React Spectrum 1.2 - ListView, unavailable menu items
📦 Streamdown 2.4 - Customization hooks, accessibility features
📦 Preact 10.29 - Implement flushSync
🎥 Web Dev Simplified - New Tanstack Hotkeys Library is Amazing
🎥 Shruti Kapoor - Image Asset Optimizations: Performance Optimizations in React
🎙️ Hamed Bahram - TanStack Start: Server Components Without the Mental Gymnastics, with Tanner Linsley

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📱 React-Native

React Navigation 8 - March Progress Report

This week, the React Navigation team shares a progress update on the upcoming 8.0 release, which has been in alpha since December 2025.

The version bumps the minimum requirements to React 19 and React Native 0.83, unlocking native APIs like Activity and Suspense. Here's what's new:

inactiveBehavior option - allows control over how offscreen screens are handled
Deep links by default - static config now auto-converts screen names to URL paths, no explicit setup needed
Schema validation support - deep link params can be parsed and typed with Zod, Valibot, or ArkType
Native symbols - new SFSymbol and MaterialSymbol components for iOS and Android icon systems
Material Design 3 themes - MaterialLightTheme and MaterialDarkTheme using Android's dynamic PlatformColor

The beta will be released once the rewritten React Native Screens integration lands.

💸 Make React apps fast where it actually matters. Learn how to diagnose real bottlenecks and fix slow, janky React apps using modern React 19 patterns.
📣 Introducing Expo Agent (private beta): build real, production-quality native apps from your browser - Expo is launching in private beta a new offer that lets you implement cross-platform apps directly from a web UI, with great DX. This looks particularly useful to have an agent trained to leverage the native platforms (SwiftUI/Jetpack Compose) or the scripting layer (RN/OTA) when appropriate.
📣 Introducing Expo Observe (private preview) - New observability tool in private preview to track real-world app performance in production. Lets you compare across builds to catch regressions and drill into individual sessions for device info and P90/P99 percentiles.
📣 Google is expanding billing choice on Google Play for users and developers - Google now allows alternative billing systems on Google Play, cuts fees to 15–20% for apps and 10% for subscriptions, and simplifies sideloading of alternative app stores.
👀 React Navigation PR - Data Loading - The library plans to tackle data loading, and prototyping new APIs such as UNSTABLE_loader and UNSTABLE_getLoaderForRoute to do so. This could help prefetch data for a route before navigating to it, improving the perceived performance and UX.
🐦 Tzvetan Mikov - “Hermes finally has native support for stripping erasable TypeScript annotations” - Once released, Hermes will be able to run TypeScript code natively, without transpilation, similarly to what Node.js and Bun are doing.
🗓️ React Native Paradise – 🇭🇷 Vir, Croatia – April & May. A week-long React Native workshop in a villa, in small groups, led by experienced devs from Software Mansion. Mention "TWIR" during your reservation and get 100 EUR off per person.
📜 Home screen widgets and Live Activities in Expo - An intro to expo-widgets, currently in alpha for iOS. This new widget solution leverages Expo UI to create a tree that maps directly to SwiftUI primitives.
📜 Keeping Screens Visible With <Activity mode="hidden>" - How to freeze effects on a hidden screen without breaking swipe-back gestures.
📜 App Flavors with Expo & EAS - Useful to create variants of your app and white labelling.
📜 Expo brownfield: How to add Expo to your existing native app without a rewrite
📜 Adding Haptic Feedback to Expo Router Native Tabs
📦 React Native 0.85 rc.0 - Removed Stylesheet.absoluteFill, dropped support for EOL Node.js versions
📦 Enriched Markdown 0.4 - LaTeX Support, Image caching
📦 Unistyles 3.1 - Smaller babel plugin, StyleSheet.addChangeListener, optional edge-to-edge, Nitro 0.35+
📦 FlashList 2.3 - New inverted prop
📦 MMKV 4.2 - .length, new encryption features
📦 Uniwind 1.5 - tv selectorn, focus selector for pressables
📦 React Native View Recorder - Capture any React Native View to a video or an imager
📦 React Native Reshuffled - High-performance, Nitro-powered grid layout
📦 Rozenite 1.4 - Storage-plugin, improved redux-devtools-plugin
📦 Rozenite Navigation Inspector - DevTools plugin for inspecting navigation state
🔗 React Native Evals - A proposition for a standardised benchmark of AI models against common React Native development tasks.
🎥 Beto - 6 Expo UI Tricks That Save You Hours of Debugging
🎙️ RNR 355 - React Native Skia for High-Performance UI with William Candillon

🔀 Other

📣 Node.js is moving to one major release per year, starting with Node 27
📜 Source Maps: Shipping Features Through Standards - How Bloomberg helped standardize source maps, and a sneak peek at 5 improvement ideas being worked on.
📜 Unknown to Typed - How to deal with unknown data that arrives at your boundary. Every as in your TypeScript is a small lie and should be a conscious decision.
📜 TypeGPU - Breaking out the jelly slider - A breakdown of the jelly slider, which has recently attracted a lot of attention, from idea to implementation.
📦 TanStack Intent - A distribution model for agent skills - Framework-agnostic CLI that lets library maintainers ship versioned "Agent Skills" alongside npm packages.
📦 TypeScript 6.0 RC - The last JS-based release before the native Go port in 7.0. In many ways, it will act as the bridge between TypeScript 5.9 and 7.0.
📦 ArkType 2.2 - Validated functions, type-safe regex
📦 Lightning CSS 1.32 - Mark imports as external, mix-blend-mode support, visitors can add dependencies
📦 View-Transitions-Mock - A non-visual Polyfill for Same-Document View Transitions

🤭 Fun

See ya! 👋

This Week In React #271 : Vinext, RSC, Activity, Async React | Expo 55, Router, Survey, Enriched | TC39, Temporal, Navigation

Sebastien Lorber — Fri, 06 Mar 2026 13:30:06 +0000

Hi everyone!

This week is rather quiet in the React world, so we took a step back on Vinext, found great community blog posts, and weak signals.

On the React Native side, let’s welcome our new author, Jan Jaworski, who covered the new Expo SDK and the State of React Native survey results, among many other things.

Let's dive in!

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What is Vinext really worth?

Last week, we covered Vinext, Cloudflare’s AI-driven reimplementation of Next.js on top of Vite. Now that the dust has settled, let’s see what the community and the Next.js team have to say.

🔐 Vibe-Hacking Cloudflare's Vibe-Coded Next.js Replacement - Show that AI-generated code passing functional tests can still miss security hardening, and automated AI tooling can help find those vulnerabilities.
🐦 Guillermo Rauch - “We've identified, responsibly disclosed, and confirmed 2 critical, 2 high, 2 medium, 1 low security vulnerabilities”
🐦 Jimmy Lai mentions that Vinext’s 94% API coverage is misleading - In reality, Vinext only passes a limited number of the 13,000+ Next.js test suite (13% dev, 20% e2e, 10% production). Many edge cases are likely misbehaving.
🐦 The cio.gov website using Vinext is "basically a static site" - This deployment doesn’t really dogfood the whole API surface of Next.js.
📖 Vercel docs - Migrate to Vercel from Cloudflare - It’s no secret that Vercel/Cloudflare CEOs do not like each other. The timing of this newly published docs page feels… noteworthy.
🎥 Fireship - Cloudflare just slop forked Next.js

While the AI-generated port is undeniably impressive, it’s likely too early to adopt it in production. It also remains unclear whether Cloudflare intends to support the project over the long term and make it production-ready.

💸 Next.js minifies your code into mush. Source maps fix that. Learn how to wire up Sentry so your stack traces are actually readable
📣 Linux Foundation Announces the Formation of the React Foundation
👀 React.dev PR - Add RSC Sandboxes - The React docs website has merged infrastructure to run full-stack interactive playgrounds. However, it hasn’t been used on any public page yet. The server-related features (RSC, async components, use, Suspense, Server Functions, Actions, streaming) run locally in a Web Worker.
👀 Oxlint + React Compiler Rules integration demo - Oxlint supports loading ESLint plugins via the jsPlugins, so technically it can run the React Compiler rules too.
📖 <ViewTransition> docs - New example - Animating enter/exit with Activity
💬 Next.js issue - Server requests and latency increased after upgrading from Next.js 15 to 16 - Users noticed an increase in server requests after upgrading. Andrew explains this is due to a new fine-grained segment prefetching system that maximizes caching efficiency. A new prefetchInlining flag is coming to give you control over this behavior until they implement a sensible heuristic.
💬 Devon from React Aria explains the limits of the native <dialog> vs JS/React abstractions
🗓 React Summit - 🇳🇱 Amsterdam - 12 & 16 Jun. Join thousands of React devs live in Amsterdam or online. Learn from top contributors and enjoy the festival-style vibes! Register now using promo code TWIR (-10%)
📜 Error rendering with RSC - Great deep-dive into how errors flow through the 3 RSC rendering environments (RSC server, SSR, browser). Only the browser supports Error Boundaries, so RSC/SSR errors need a clear path to reach the client side and get displayed.
📜 Understanding Why React Fiber Exists - Greatly explains why React abandoned recursive reconciliation in favor of the Fiber architecture, making it possible to pause rendering and accept new user inputs.
📜 React is changing the game for streaming apps with the Activity component - Practical use case for <Activity> to preserve playback state when hiding video/audio players. Don’t forget to pause the player using an Effect cleanup function.
📜 Frontend Memory Leaks: A 500-Repository Static Analysis - A study scanned 500 repos across many frameworks and breaks down the results. Gives an overview of the most frequent React-related memory leaks, notably the lack of a useEffect cleanup function.
📜 Create a Per-Request Database Instance with React Router Middleware - Shows how to wrap each request in a database transaction.
💸 Certificates.dev - Validate your cross-stack capability with a comprehensive Certification for Laravel. Limited-time launch offer: 40% off!
📦 TanStack Store 0.9 - API breaking changes, using faster alien-signals library
📦 Vite Plugin React beta.0 - Drop Vite 7 support, remove Babel dependency
📦 Next-translate 3.0 - Turbopack, Next.js 16, and a New Chapter
📦 React-Admin 5.12, 5.13, 5.14 - February 2026 Update
🎥 Jack Herrington - TanStack Start SSR: 3 Reasons To Love It
🎥 Josef Bender - New TanStack Package: Exclusive First Look
🎙️ This Month in React 2026-02 - CloudFlare remakes Next with AI; Vercel big mad. We talk too much about AI Agents

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📱 React-Native

Expo SDK 55

Expo SDK 55 is out now as a stable release! It brings React Native 0.83, React 19.2, Expo Router 55, and a massive amount of improvements across the entire ecosystem.

React Native 0.82 & 0.83 Highlights:

The New Architecture is now a requirement. You can try out new AI skills to help you with the update process.
React 19.2 Integration: Brings the new <Activity> API (for preserving state in hidden component trees) and useEffectEvent.
DOM Node APIs: Native components now provide DOM-like nodes via refs, allowing you to traverse the UI tree and measure layouts just like on the web.
Revamped DevTools: A brand-new DevTools desktop app that no longer requires a browser, featuring dedicated Network and Performance panels. Web Performance APIs are also now stable.
Optimized Android Debugging: A new debugOptimized build type speeds up your dev environment, allowing animations and re-renders to hit ~60FPS while still allowing JS debugging.
Experimental Hermes V1: Available as an opt-in, bringing meaningful performance improvements for bundle loading and Time to Interactive (TTI).

Expo SDK 55 Highlights:

Expo Router v55 with Native Features: Added support for the native Apple Zoom transition, a new iOS Stack.Toolbar API, experimental SplitView, and a new Colors API for dynamic Material 3 and adaptive iOS colors. Yes, the versioning scheme has changed: it’s v55, not v7.
AI Tooling: You can try out new AI skills to help you with the update process. Expo also introduced Model Context Protocol (MCP) tools for CLI actions/EAS services, alongside the official expo/skills repository.
Developer Experience: A small but welcome improvement is the ability to discover active dev servers on iOS with no QR code scanning needed!
Smaller OTA updates: ship up to 75% smaller OTA updates thanks to Hermes bytecode bundle diffing.

This release also shapes the future of video in React Native. The legacy expo-av module has been removed and replaced by expo-video & expo-audio, which feature an improved API, synchronous calls, and better state management with atomic state updates.

State of React Native 2025

The results for the State of React Native 2025 survey are officially out! This year marks the 10th anniversary of React Native, alongside hitting a massive milestone of 4 million weekly downloads (double last year's numbers!). The ecosystem is maturing rapidly, and the survey reflects a highly positive shift in the overall developer experience. Software Mansion devs break it down on their YouTube channel.

Here are some of the highlights that we’ve found interesting:

The New Architecture Era: The New Architecture is now the default and has already reached an impressive ~80% adoption rate. Combined with recent React Native releases shipping with zero user-facing breaking changes, the dreaded "upgrade pain" is finally fading into the past.
Navigation: React Navigation and Expo Router dominate the space. While deep linking and TypeScript inference remain the top developer pain points, upcoming updates (like React Navigation 8) are specifically targeting these exact issues. We are also seeing a massive push toward new native primitives like native tabs, split views, and zoom transitions.
Styling: The community is heavily leaning into Tailwind-style utility classes (NativeWind) and react-native-unistyles. While the "lack of a standard CSS API" was a top complaint, React Native is rapidly closing the gap by shipping web-compatible features natively—like box shadows, gradients, and CSS filters—with more on the way.
Graphics & Animations: React Native Reanimated remains the undisputed king of animations, with developers highly praising the new Shared Element Transitions. Meanwhile, React Native Skia is maturing fast, empowering developers to build much more ambitious and performant custom graphics without native code.
Community Stewardship: With the recent launch of the independent React Foundation (hosted by the Linux Foundation), the future stewardship of React Native looks incredibly stable.

💸 PostHog - Monitor and debug errors in your React Native app with crash reporting and stack traces. 100k exceptions free every month
📊 State of Subscription Apps 2025: Revenue by mobile app framework shows that React Native apps perform the best in earnings.
👀 Vision Camera 5 preview - The upcoming release now has a dedicated documentation section detailing its new features.
💬 AbortController RFC - A proposal to better align React Native's implementation with the web standard and support the missing APIs.
🐦 RNRepo now supports iOS - Faster build times thanks to pre-built library artifacts.
🐦 React Native Worktree skill - enables multiple agents to use simulators without conflicts
📜 Sparkling: The Missing App Layer for Lynx.js? - The Callstack team explores the previously mentioned Lynx framework.
📜 Building reliable AI Chat on mobile - An insight into the challenges of building a great user experience for mobile AI chat interfaces. Also announcing a FlatList-compatible library to address these challenges.
📜 Expo UI tips - Non-obvious solutions and techniques to make your app make use of native features to look and feel better.
📜 React Native Monorepo with PNPM Workspaces
📦 @native-html/render - Render HTML as native views - This old package has been refreshed and is now officially maintained by Software Mansion.
📦 Grab - Touch-to-grab context tool for React Native UI changes - Similar to React-Grab on the web, this convenient tool permits giving accurate context to LLMs.
📦 Nitro 0.34, and Nitro 0.35 with an API breaking change to fix a memory leak issue.
📦 Enriched 0.5 - HTML normalizer, preserve rich formatting, and more
📦 Enriched Markdown 0.3 - RTL support, GFM support (tables, task lists, and autolinks)
📦 Brownfield 3.0 - New Expo Config plugin
📦 Maestro CLI 2.2 - Visual Testing capabilities
📦 Metro 0.84.1 - HTTPS support in Metro server
📦 Uniwind 1.4 - Scoped theme
📦 Boost 1.0 - A Babel plugin that automatically optimizes your apps
📦 Agent Device 0.7 - TV support, push notifications, clipboard commands, network dump, dogfood skill
🎙️ React Native Radio 354 - React Native Screens with Krzysztof Magiera - Deep dive and sneak peek into the upcoming 5.0 rewrite built exclusively for the New Architecture.

🔀 Other

👀 TC39 - Agenda for the 113th meeting - 10-12 March - Next week, major proposals such as Temporal and Explicit Resource Management could move to stage 4.
📣 Navigation API - a better way to navigate, is now Baseline Newly Available - The modern alternative to the History API is ready for prime time. Part of Interop 2026, the remaining browser incompatibilities should be fixed by the end of the year.
📣 Announcing npmx: a fast, modern browser for the npm registry
📦 Firefox 148 - Unlocks cross-browser support for CSS shape(), position-try-order, and Trusted Types to prevent XSS attacks. Speaking of XSS, Firefox is also the first browser to land the new Sanitizer API and setHTML().
📦 Bun 1.3.10 - New REPL, ES decorators, faster event loop, barrel optimization, and more
📦 Deno 2.7 - Temporal API, Windows ARM, and npm overrides
📦 Solid 2.0 beta - Async is first‑class, computations can return Promise, the graph knows how to suspend/resume
📦 Better Auth 1.5 - New CLI, OAuth 2.1 Provider, Electron integration, i18n support, and more

🤭 Fun

See ya! 👋

This Week In React #270 : Next.js, React Router | Hermes, React Navigation, CSS Grid, Maestro | Node, Oxfmt

Sebastien Lorber — Fri, 27 Feb 2026 18:32:12 +0000

Hi everyone!

Hello everyone, Krzysztof and Kacper from Software Mansion here 👋

The React Foundation officially launched. Cloudflare rebuilt the whole Next.js in a week using AI. In the meantime, the real Next.js is adding version-matched docs so agents always have context on new and recently updated APIs.

On the React Native side, Hermes is moving beyond mobile: Hermes-node brings the engine to Node.js as a potential V8 swap. CSS Grid is also coming to React Native, and TanStack Router has an early PoC running natively.

Let's dive in!

💡 Subscribe to the official newsletter to receive an email every week!

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How we rebuilt Next.js with AI in one week

A single Cloudflare engineer rebuilt the Next.js API surface (App Router, RSC, Server Actions, middleware) on Vite in one week using AI for $1,100. Using Oxc/Rolldown, it builds 4.4x and produces 57% smaller bundles. Using the Vite Environment API, it overcomes OpenNext limits, making it compatible with edge runtimes such as Cloudflare Workers.

What started as a bold experiment became vinext. It passes 2000+ tests and has 94% test coverage of the Next.js 16 API surface. The cio.gov website already runs it in production. It also introduces new concepts such as “Traffic-aware Pre-Rendering”.

This AI-driven port was only possible because Next.js has a well-documented API surface and a comprehensive test suite. A reminder of something TDD practitioners have known for years, but seems more important than ever today: the real value lies in the specification, the test suite, and the API design. Even Guillermo Rauch now believes that most software will start as markdown spec files implemented by coding agents. In Tests Are The New Moat, the author argues that we may see more open-source projects with private test suites: that’s what SQLite is already doing.

💸 Make React apps fast where it actually matters. Learn how to diagnose real bottlenecks and fix slow, janky React apps using modern React 19 patterns
📣 The React Foundation has officially launched, hosted by the Linux Foundation - React, React Native, and supporting projects like JSX are no longer owned by Meta. Huawei joined the previously announced founding members.
📖 Next.js - AI Agents Guide - Upcoming Next.js releases will include version-matched docs to provide agents with up-to-date context, improving Next.js Evals success rate by ~20%.
📜 Aurora Scharff - Building Design Components with Action Props using Async React - Pattern for encapsulating optimistic updates, pending indicators, and rollback inside reusable components
📜 TkDodo - Creating Query Abstractions - Using queryOptions is an alternative to hooks for achieving a reusable data object. This approach allows you to use the object even outside of React components.
📜 Kent C. Dodds - Migrating Remix v2 to React Router v7 with Cursor - Showcases how he used Composer for large-scale dependency upgrades completed in a day.
📜 React Router Loaders and Actions as Integration Points - Testing routing with business logic in isolation is tough due to complex mocking. The author suggests that mixing unit and e2e tests can solve that.
📜 Create a Multi-Directory Route Organization in React Router - By using flatRoutes, you can maintain a scalable structure with better logic separation in a growing React Router application.
📜 Removing Next.js Taught Me Why Frameworks Are Still Essential Even for AI - The author tried building with HTML and vanilla JS, then concludes that frameworks are necessary precisely because we are in the era of agents, giving them useful constraints. Note that Elon Musk predicts something different: AI will bypass coding and directly create binaries (tweet).
📜 React’s useTransition: The hook you’re probably using wrong
📜 Creating a 3D Product Grid with React Three Fiber
💸 Product for Engineers - 10x job posts for 10x engineers
📦 Ink 6.8 - renderToString(), React DevTools v7, performance caching
📦 Split Pane 3.2 - pointerType in ResizeEvent
📦 Vercel Chat SDK - Lets you build chatbots, supports JSX syntax
🎥 Josef Bender - Build a blog with type-safe Markdown and TanStack Start
🎥 Fireship - TanStack Start in 100 Seconds
🎥 Hamed Bahram - Master nuqs in 1 hour - URL state in NextJs with François Best

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📱 React-Native

Hermes-node

Tzvetan Mikov from the Hermes team announced Hermes-node, a CLI version of Hermes compatible with the Node.js API. Since Hermes-node acts as a compatibility layer, it can use original Node.js module implementations without needing to rewrite them - most work out of the box. You can think of this as simply swapping the V8 engine for Hermes. If combined with compiling Hermes to binary code, this feature could bring significant benefits to the entire Node.js ecosystem.

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👀 React Native PR - CSS Grid is coming to React Native
👀 Keyboard Controller PR - New <KeyboardChatScrollView> component - Eliminates re-layouts during keyboard animations to improve performance
🐦 Tanner Linsley announced a PoC of TanStack Router running in React Native (GitHub code)
🐦 React Navigation 8 is experimenting with <Activity> for freezing and unmounting inactive screens
🐦 Jay Meistrich is testing Legend List v3 in production (Legend App), resulting in significant performance improvements
📜 Brownfield React Native app with multiple screens - Fixes a ReactFragment lifecycle race condition on Android and a static RN View Factory pattern on iOS - both needed to avoid crashes when pushing multiple RN screens.
📜 The experience of adding E2E testing to React Native with Maestro - A case study on the benefits of using Maestro over Detox: simpler, platform-agnostic configuration, fewer technical quirks, and a lower barrier to entry.
📜 React Native Comes to Meta Quest - Meta officially announced support for Horizon OS, allowing developers to build VR applications using their existing Android tools and knowledge.
📜 Do you need an MCP to build your native app? - A simple Markdown file with basic instructions can work better and is more affordable than a complex MCP from Xcode.
📦 QuickPush 2.0 - MacOS menu bar app for testing Expo Push Notification - Paid tool, can be used for free by compiling it from sources.
📦 RN Vibe Code - an open-source IDE for vibe coding - Runs in the browser.
📦 Sentry React Native 8.1 - enableTombstone for native crash reporting on Android 12+, iOS view filtering for session replay
📦 Posthog React Native 4.36 - Manual session replay control - New startSessionRecording, stopSessionRecording, and isSessionReplayActive methods.
📦 Stripe React Native 0.59 - Connect Embedded Components (preview), Radar session support
📦 Datadog 3.1.0 - Feature Flags - Using an open standard for feature flag management.
📦 Bottom Tabs 7.14 - Support hiding the native tab bar
📦 Screens 4.24 - Last release with Legacy Architecture support, Split View enhancements, iOS 26 fixes - Next version will drop support for RN < 0.82 and only support the New Architecture.
📦 Async Storage 3.0 - Instance-based storage, promise-only API, renamed batch methods - Breaking major, consult migration guide to v3.
📦 Number Flow 0.2 - New library that provides Text component with build in rolling counter animation
📦 Markdown Renderer 4.0
📦 Quick Crypto 1.0.12 - Full NodeJS Crypto API compatibility
🤖 Expo Skills - Official collection
🎥 React Universe Meetup x Zalando - All the talks are online
🎥 Callstack - Using Apple Intelligence Seamlessly With @react-native-ai/apple
🎥 Callstack - MLC LLM + React Native: On-Device AI Without the Pain
🎙️ Rocket Ship 92 - React Native 0.84, Hermes V1 & A TanStack React Native Framework?

🔀 Other

🤭 Fun

See ya! 👋

This Week In React #269 : State of React, TanStack, Next.js | Hermes, Sparkling, Yoga | Interop, Electrobun, Module Federation

Sebastien Lorber — Fri, 20 Feb 2026 13:31:28 +0000

Hi everyone!

Huge thanks ❤️ — we just hit #1 resource on the State of React 2025 survey. Wild.

This week leans heavily into TanStack and Next.js content, plus a few notable releases worth your time.

On mobile, Hermes is clearly ramping up, and ByteDance just lowered the barrier to building Lynx apps.

Let’s dive in.

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⚛️ React

State of React 2025 - Survey Results

The State of React 2025 survey results are out. It’s impossible to summarize it all here, but here's what I've taken away:

useEffect remains the most disliked hook
<Suspense> increased in both adoption and satisfaction
React Server Components and Server Functions divide
Although usage is still low, <Activity> reaches a 100% satisfaction score
TanStack Query and Zustand remain the favorite libraries
Your favorite resources are the official docs, this newsletter (❤️), Syntax.fm, Theo.

Read also the breakdown from Aurora Scharff, who wrote the survey conclusion.

💸 Make React apps fast where it actually matters. Learn how to diagnose real bottlenecks and fix slow, janky React apps using modern React 19 patterns.
🔐 High-Severity RCE Vulnerability Disclosed in next-mdx-remote - Member that MDX is code and it’s unsafe to evaluate untrusted MDX strings.
🗓 React Paris 2026 - 🇫🇷 Paris - 26 & 27 March. Last chance to join! Ticket sales close on March 4th - don't miss this premier React event. Get a 10% discount with code "TWIR".
📜 Vercel - We Ralph Wiggumed WebStreams to make them 10x faster - For Next.js and other React/SSR/RSC heavy workloads, the Node.js native implementation of WebStreams can be major a bottleneck. They implemented a much faster spec-compliant alternative, until upstream performance improvements land in Node.js. No doubt Next.js is going to benefit from all this soon.
📜 Building Next.js for an agentic future - The Next.js team realized they need to treats agents as first-class users, thinking from their perspective.
📜 Virtual Scrolling for Billions of Rows - 5 vertical scrolling techniques from the `hightable` React virtualization library.
📜 Radix UI vs Base UI - Detailed Guide
📜 Next.js Finally Has Competition (TanStack Start)
📜 The Journey to a Safer Frontend: Why Gusto Removed React.FC
💸 The Secret to Faster RAG Systems by ElevenLabs
📦 Tailwind 4.2 - Webpack plugin, new utilities and color palettes - The Webpack plugin has been contributed by Tim Neutkens and should lead to significant performance improvements for frameworks like Next.js (even for Turbopack).
📦 Base UI 1.2 - Drawer component, support lazy/async components in render, new useFilteredItems hook - The new Drawer component is in preview (docs) for now. Unlike Radix, it’s not based on Vaul (now unmaintained).
📦 TanStack Hotkeys alpha - This brand-new TanStack library is framework-agnostic, but initially comes with a first-class React integration. It provides a type-safe API, normalizes modifiers across platforms, supports multi-step keyboard sequences, and more.
📦 TanStack Start 1.161 - Import protection - Ensures your code runs in the right client/server environment.
📦 Preact 11.0 beta.1 - By the way, TanStack query now supports Preact.
📦 React Doctor - Scan your codebase, let coding agents diagnose/fix your React code
📦 json-render 0.7 - Generative UI framework - Add 30+ shadcn/ui components, and more
🎥 Austin Davis - TanStack Router - How to Become a Routing God in React
🎥 Josef Bender - TanStack Loaders vs Context: What I Got Wrong
🎥 Shruti Kapoor - Build a YouTube content dashboard with generative UI (Tambo)

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📱 React-Native

WebAssembly Comes to Hermes

An exciting early preview of WebAssembly support in Hermes, unlocking new ways to integrate C, C++, Rust, and more into your React Native app. It’s even possible to precompile WASM to Hermes bytecode .hbc files.

Sparkling - Unlocks Lynx at TikTok Scale

ByteDance unveiled Lynx last year as an interesting framework-agnostic alternative to React Native. So far, the DX has been limited, and there has been no easy way to create a new Lynx app from scratch. Sparkling changes that, and offers the tooling that Lynx apps deserve. By the way, Lynx 3.6 is out, improving support for React, AI, and CSS.

🔀 Other

👀 Interop 2026 - Web browsers unveiled their focus areas for the year. This includes new features (cross-document view transitions, scroll-driven animations, container style queries…), but also stabilizing carryovers from Interop 2025 (anchor positioning, navigation API…).
👀 Selectors Level 5 - W3C First Public Working Draft - Preview of new CSS selectors and pseudo-classes being worked.
📜 Fun with TypeScript Generics
📜 Fastest Frontend Tooling for Humans & AI
📦 Module Federation 2.0 - Micro-Frontend Architecture - Adds support for SSR among many other things. They also plan to add support for React Server Components later.
📦 Electrobun 1.0 - Build ultra fast, tiny, and cross-platform desktop apps with TypeScript - An alternative to Tauri based on Bun/Zig.
📦 Chrome 145 DevTools - The performance panel now includes Soft Navigation markers, improving the DX when troubleshooting client-side navigation (SPA/CSR apps).
📦 Biome 2.4 - Embedded Snippets, HTML Accessibility, and Better Framework Support
📦 pnpm 10.30 - Improves pnpm why, showing an easier-to-understand reverse dependency tree

🤭 Fun

See ya! 👋

This Week In React #268 :Bulletproof Comps, Render Types | RN 0.84, Gestures, Rozenite, Storybook | Vitest, VSCode

Sebastien Lorber — Fri, 13 Feb 2026 12:48:50 +0000

Hi everyone!

This week, we have a good variety of React content, with great community articles and various releases. Many generative UI solutions are emerging, and I’m curious to better understand how they differ from one another.

React Native 0.84 just dropped, and Gesture Handler 3 is in beta. Expo SDK 55 should also be out soon.

💡 Subscribe to the official newsletter to receive an email every week!

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⚛️ React

Building Bulletproof React Components

A great read from an experienced Vercel engineer, sharing various lessons to harden your React components. The goal is to make them survive real-world usage (SSR, hydration, multiple instances, concurrency, portals, etc.) rather than just working on the happy path.

💸 FormEngine Core – Lightweight React JSON Schema form builder library for MUI with true cross-app reuse. No deep React knowledge required
📜 A React trick to improve exit animations - Freezing the component’s content while it’s animating to avoid visual glitches.
📜 The Recent CVEs in React and Node.js Were Found by an AI - Interesting to see the process of security researchers to find the recent RSC DoS vulnerability, and how it can be automated.
📜 React Compiler and why class objects can work against memoization - Prefer plain data and pure helpers that the React compiler can observe as inputs.
📜 The logo soup problem (and how to solve it) - Brand logos come in various logo shapes, aspect ratios, padding, and weights. Creating a visually aesthetic logo grid is surprisingly complex, but we now have a React library to help normalize them.
📜 Next.js at Enterprise Level
📜 Authenticated Routes with TanStack Router
💸 Product for Engineers - How I actually get good advice
📦 Tambo 1.0 - Generative UI SDK for React - An interesting full-stack solution for generative UI with React, tackling problems such as UI state persistence, streaming, and more. Comes with a backend that you can deploy on their cloud or self-host.
📦 eslint-plugin-react-render-types - Brings Flow's Render Types to TypeScript via JSDoc - Render Types is a really cool feature of Flow that lets you express constraints on React composition patterns, loved by many engineers at Meta. TypeScript doesn’t support this capability natively, but this ESLint plugin enables it.
📦 React Compiler Marker - Universal IDE extension, shows which components are optimized by the Compiler - Recently switched to an LSP, unlocking support for additional IDEs: IntelliJ/WebStorm/Neovim.
📦 React2AWS - Write AWS infrastructure like you write React components - Generates production-ready Terraform from JSX components and Tailwind-inspired classNames 🤪, fun idea.
📦 Ink 6.7 CLI renderer - Add support for React concurrent rendering, synchronized updates
📦 shadcn/ui - All blocks now available for both Radix and Base UI
📦 Visual Agentic Dev - Immersive React dev environment that lives within the browser
📦 Streamdown 2.2 - Animated streaming, improves support for custom HTML elements, completes ReactMarkdown props
🎥 Wawa Sensei - 3 React Three Fiber Mistakes I'll Never Make Again
🎙️ This Week in React - Oops more CVEs. AI has React "skills", Astro exits and Tailwind struggles

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📱 React-Native

React Native 0.84

A new version of React Native just dropped. The highlights:

Hermes V1 is now enabled by default for automatic performance gains and reduced memory usage
Precompiled binaries on iOS by default for faster builds, with an opt-out to build from source
Legacy Architecture Components removed for both iOS and Android

Gesture Handler 3.0 beta - Hook-Based API, Deeper Reanimated Integration & More

This new major version has been overhauled internally. It drops support for the Legacy Architecture, unlocking new capabilities, such as attaching gestures to text fragments. No APIs were removed, but a new hooks-based API makes it compatible with the React Compiler. They also improved the integration with Reanimated and Animated.

💸 Radon by Software Mansion - Join 42k+ React Native developers using Radon for faster, more efficient React Native development.
👀 React Native PR - Support React Portal with Fabric - React Native portals have been all the rage lately. Teleport just launched 1.0 last week, and we now have an experimental PR that kicks off the discussion of bringing first-class portal support to React Native, at the shadow-tree level (cross-platform).
🐦 William Candillon sharing WebGPU + Skia demos - You can seamlessly interleave one into the other from both sides.
📅 App.js Conf is looking for speakers! Apply to share your insights and stories about building with React Native & Expo! - The CFP is open until 28th February, and you can also get a 10% discount on tickets with our code “TWIR”.
📜 Building Rozenite: The injection - Explains how Rozenite is able to add specialized panels to the React Native DevTools, by hijacking a request.
📜 Faster, cheaper, messier: lessons from our switch to self-hosted GitHub Actions - Feedback from The Guardian after migrating their iOS app build from GitHub cloud runners to a self-hosted Mac Mini.
📜 How to modernize mobile retail apps with Expo
📦 React Native Storybook Tools - RN Storybook maintainer created a new VSCode extension that lets you seamlessly navigate from/to your stories, and a Rozenite devtool plugin.
📦 JSON Render 0.5 - Support for React Native - The generative UI library from Vercel now comes with a React Native integration. See also this X video demo.
📦 React Native Video Feed - Starter for building TikTok-style video feeds, based on react-native-video v7 (still in beta).
📦 Expo Apple Target 4.0 - Add support for 20+ new targets
📦 React Native Material Palette - Android Palette API, extracts prominent colors from images
📦 React Native ExecuTorch 0.7 - Local speech synthesis - If you are excited about offline-first AI, check also their roadmap toward v1.
📦 Expo Paste Input - Paste images and GIFs directly from the system clipboard, flexible native wrapper around TextField
📦 True Sheet 3.9 - Side Sheets for iPad and Tablets
📦 Expo OpenClaw Chat - Minimal SDK for Expo apps to connect to OpenClaw gateway
📦 React Native IAP 14.7.9 - 14.7.9 - tvOS, macOS & watchOS Support
🤖 Callstack Agent Skills updated - New skills to upgrade React Native / Expo
🎥 Beto - Expo Router iOS 26 Tutorial: Native Tabs, Toolbars, Zoom Transitions (SDK 55)
🎥 Software Mansion - Radon, An IDE for React Native & Expo
🎥 Callstack - What Is the React Native AI SDK? A Complete Intro & Quickstart
🎙️ RNR 353 - Node-API Support for React Native with Kræn Hansen
🎙️ Rocket Ship 91 - Gesture Handler v3, AI Agents Everywhere, Animated Components & Tiny Harvest Momentum

🔀 Other

👀 TypeScript 6.0 Iteration Plan - The last JS-based version (no 6.1 planned) is about to drop in beta (last minute edit: 6.0 beta is out). A bridge release that prepares us for the faster 7.0 Go rewrite. One notable change is to turn strict mode on by default.
👀 Webpack - Roadmap 2026 - The historical bundler plans to ship several new features, such as native CSS module, TS loader, multi-threading support, a universal runtime target, a unified minimizer API, and more. They also published v5.105 recently, with support for tsconfig.json alias resolution.
📖 Vitest 4.1 beta - Test tags - This upcoming feature lets you categorize tests under tags that you can configure independently. For example, you could tag a test as flaky to assign it a specific retry/timeout policy.
📜 The Wrong Work, Done Beautifully - The author of jsdom reflects on the usefulness of his popular library compared to headless browsers. However, Claude Code restored his enthusiasm for maintaining the project. By the way, v28.0 is out.
📜 How Rolldown Works: High-Performance Code Splitting with Bitset Logic
📦 Almostnode - Node.js in your browser - This lightweight and open alternative to WebContainers can run Next.js and Vite apps.
📦 Chrome 145 - Map.prototype.getOrInsert(), CSS text-justify, letter-spacing - They also announced an early preview of WebMCP in Chrome 146, letting you expose tools for AI agents to interact with your websites/apps.
📦 ESLint 10.0 - Improves JSX references tracking, removes eslintrc configuration, smaller
📦 Bun 1.3.9 - bun run –parallel / –sequential
📦 VSCode 1.109 - Improved Agent UX and extensibility

🤭 Fun

See ya! 👋

This Week In React #267 : Bun, Next-Intl, Grab, Aria | Worklets, Teleport, Voltra, AI SDK, Screens | State of JS, Temporal

Sebastien Lorber — Fri, 06 Feb 2026 09:11:55 +0000

Hi everyone!

You’ll have to get used to it: yet another week filled with AI content. From MCPs to Agent Skills to AI-specific CLIs, we don’t know where to turn anymore.

We’re delighted to be ranked once again among the top 5 newsletters in the State of JavaScript 2025 survey. Thanks for your trust!

By the way, we’d love your feedback — what do you like about the newsletter, and how could we make it better in 2026?

Just hit reply and let us know! ❤️

💡 Subscribe to the official newsletter to receive an email every week!

💸 Sponsor

React Performance, v2

Make React apps fast where it actually matters.

An advanced performance course from Steve Kinney, focused on diagnosing real bottlenecks and fixing slow, janky React apps using modern React 19 patterns.

🚀 Modern React: Suspense, transitions, deferred values, hydration, server actions
🔍 Debug Faster: Find unnecessary re-renders with React DevTools & the Profiler
🧠 Smart Optimization: Memoization, virtualization, code splitting, optimistic UI
⚡ Feel-Fast UX: Learn how React Fiber prioritizes work to keep apps responsive

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⚛️ React

💸 PostHog - 8 learnings from 1 year of agents
👀 React DOM PR - Support for SubmitEvent.submitter
👀 React.dev PRs - Revamp docs of useOptimistic, useActionState, and useEffectEvent.
📜 React’s ViewTransition Element - Chris Coyier compares the pros and cons of using <ViewTransition> VS the native platform API document.startViewTransition() in a React app.
📜 Why Inngest migrated off Next.js to TanStack Start - Reducing local dev time by 83% - Ingress was an early adopter of RSCs but got bitten by them, experienced slow local DX despite using Turbopack. They share their migration strategy and lessons learned.
📜 Reverse-Engineering Figma Make: Extracting React Apps from Binary Files - Figma Make uses React, Radix UI, and Tailwind under the hood, and you can recreate the underlying React app from .fig files.
📜 The engineering behind GitHub Copilot CLI’s animated ASCII banner - Rendering reliable animated components to the terminal UI looks complex, even if you leverage the React Ink renderer.
📜 Can AI actually debug complex React/Next.js issues? - Throwing 3 real-world bugs at Claude Opus, it could only fix one properly.
📜 React design system library MCP - How to leverage the experimental Storybook MCP server
💸 Building AI Voice Agents at Scale — The executive playbook by ElevenLabs
📦 Next Intl 4.8 - Ahead-of-time compilation - This can significantly reduce your bundle size. Instead of bundling a full ICU parser to the client, it’s now possible to precompile ICU messages to a minified AST interpreted by a lightweight runtime.
📦 Bun 1.3.8 - Bun.markdown API - Comes with a first-class Bun.markdown.react() API and claims to be much faster than React alternatives.
📦 React Grab 1.0 - Select context for coding agents directly from the website - A convenient tool can make your coding agent 3x faster thanks to more precise prompts.
📦 shadcn/ui updates - RTL support, unified Radix UI Package
📦 React Aria 1.15 - New render prop, Agent Skills, constrain dates on blur
📦 Gatsby 5.16 - Add support for React 19 and Node 24
📦 Rspress 2.0 - Documentation framework - Theme styling, AI-native, Shiki highlighting, performance, new plugins
📦 React Three Fiber 10.0 alpha - Backward compatible, WebGPU support, TSL hooks, new scheduler
📦 Travels 1.0 - Fast, framework-agnostic undo/redo library with React integrations
📦 Prefill - Partial application for React components
📦 Meteor 3.4 - Rspack integration, 4x faster builds, 8x smaller bundles, and extended bundler features
📦 ESLint React 2.9 - Extract React RSC sub-plugin, new RSC preset
📦 Rsbuild Plugin React Router 0.1 - Behavior closer to React Router's official Vite plugin
🤖 React Router Agent Skills
🤖 React Composition Patterns Agent Skills
🎥 Toby Mey - Where to put Auth in Next.js 16?
🎥 Remotion - Create motion graphics with AI – Simple tutorial for beginners

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Behind the Scenes of React Native Multithreading: Vision Camera V5 x React Native Worklets

Worklets have been extracted from Reanimated to become a first-class multithreading primitive. It has been integrated into the upcoming VisionCamera V5, enabling its real-time frame processor system to run directly on the Camera Thread.

Also, take a look at 📦 Worklets 0.8 - Bundle Mode preview. It makes it possible to use third-party libraries and do network requests within worklets. This mode is opt-in but might become the default in the future.

💸 Stop searching for components manually - try the Element Inspector in Radon to build React Native apps faster.
📜 Building Voltra: Renderer - The creator of the Widgets and Live Activities library explains how it works under the hood. It’s a custom renderer, but using react-reconciler wasn’t a great fit, so they took inspiration from React DOM SSR code instead.
📜 5 tips to increase mobile app downloads and retention in 2026
📦 Teleport 1.0 - Brings true native portals to React Native - The equivalent of ReactDOM.createPortal for mobile, with additional view re-parenting, re-use, and pre-rendering capabilities. It’s cross-platform and also supports web.
📦 Screens 4.21 - Android stack screen preloading, iOS xcassets icon catalogs support for key navigation UI elements - Note that iOS xcassets icon catalogs are already integrated into React Navigation for native tabs.
📦 Xcode 26.3 RC - Unlocks the power of agentic coding - If you don’t want to use Xcode as an IDE, you can still leverage the new Xcode MCP and its RenderPreview tool to feed your AI with visual feedback (SwiftUI previews, it probably doesn’t work with RN views).
📦 Agent-Device - CLI to control iOS and Android devices for AI agents - The equivalent of Vercel’s agent-browser for mobile. Support for TV/desktop apps planned.
📦 AI SDK Profiler - New Rozenite DevTools plugin - Lets you inspect OpenTelemetry spans coming from the RN AI SDK
📦 AI SDK 0.12 - Profiler plugin, ai v6, tool calling and re-ranking for Llama models
📦 Tamagui 2.0 RC - Universal style library for React - More stable, easy, documented, fast, and feature-complete
📦 Uniwind 1.3 - Support data attributes
📦 Superconfig - 18x faster than react-native-config, using Nitro
🎥 Callstack - Implementing an Android TurboModule from Scratch
🎥 React Native Live - New monthly live show channel from Infinite Red
🎥 Beto - Are You Leaking Your Environment Variables? React Native + Expo
🎥 Simon Grimm - 10 Tips You Need For Expo Router in 2026!
🎙️ RNR 352 - Expo Launch with Cedric van Putten

🔀 Other

📊 State of JavaScript 2025 - Survey Results - React and Next.js keep growing in usage, but satisfaction is decreasing. Meanwhile, alternatives such as Astro and Solid have pretty high satisfaction scores.
📜 Implementing the Temporal proposal in JavaScriptCore - The JS Temporal API should be in all browsers relatively soon, with Safari being the last remaining browser. The implementation for JSC (Safari, Bun) is complete but not merged yet.
📜 Node.js Path Traversal: Prevention & Security Guide - Explains how to secure your Node app from unsafe path inputs, such as http://localhost:port/images/../../etc/passwd.
📜 Building a browser API in one shot - With a good prompt created by an expert, Claude Opus can one-shot a decent TypeScript implementation of IndexedDB.
📦 Astro 5.17 - Dev toolbar placement, partitioned cookie, async file loader parser
📦 Turborepo 2.8 - Git worktree support, Agent skills, AI-enabled
📦 Babel 7.29 - The last Babel 7 minor release - They are also announcing Babel 8 in RC, aiming to be easy to adopt, and ESM-only.
🔗 npmx - A fast, modern browser for the npm registry

🤭 Fun

See ya! 👋

This Week In React #266 : DoS, shadcn, Skills, Rspack | Expo 55 beta, Hermes, Expo Router | TC39, Rolldown, Yarn

Sebastien Lorber — Fri, 30 Jan 2026 13:56:14 +0000

Hi everyone!

This week, the community continued to publish React-related Agent skills. React RSCs and Next.js are hit by another set of DoS vulnerabilities, and it’s recommended to upgrade immediately.

The React Native side is more exciting, with Expo SDK 55 in beta and upcoming support for new CSS features. We now have 2 distinct libraries implementing home screen widgets, and need to understand the trade-offs of each approach.

💡 Subscribe to the official newsletter to receive an email every week!

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⚛️ React

💸 Make React apps fast where it actually matters. Learn how to diagnose real bottlenecks and fix slow, janky React apps using modern React 19 patterns.
🔐 React CVE-2026-23864 - More Denial-of-Service vulnerabilities have been found in the React RSC-related packages, and have already patched in all React 19 minor versions. All RSC frameworks can be affected. It’s recommended to update immediately.
🔐 Next.js DoS CVEs - In addition to the CVE above, Next.js also published fixes for 2 medium-severity DoS vulnerabilities affecting the Image Optimizer and PPR in self-hosted deployments.
👀 React PR - Init Claude config - It seems like the React core team is planning to leverage AI more.
👀 React-DOM Types PR - Properly type form-related events - Narrowing the type of event.target to its underlying element, for example, HTMLInputElement.
👀 React Aria PR - Add render prop to allow customizing DOM element - React Aria chose the render prop pattern (following Ariakia and Base UI) and not the asChild pattern popularized by Radix UI.
👀 TanStack PR - New @tanstack/meta package - New package coming for composable SEO / meta tags management.
🗓 React Summit - 🇳🇱 Amsterdam - 12 & 16 Jun. The world's biggest React conference is back! Knowledge you'll use, people you'll remember, and an after-party you won't forget. Reserve your spot to with promo code TWIR (-10%)
📜 The Incredible Overcomplexity of the Shadcn Radio Button - A fair criticism, questioning the need for abstraction layers and repurposing HTML elements, instead of just styling <input type="radio">.
📜 Single Flight Mutations in TanStack Start - Explains how to mutate the data and refresh the UI in a single network round trip. The first article shows the big picture with a simple implementation, while the second makes it more robust and scalable using middleware.
📜 StyleX - New Year, New Website - The modern CSS-in-JS library gives an overview of 2025, covering project adoption outside Meta, new APIs, and easier integration. They rebuilt the docs with Waku to dogfood the project and its compatibility with RSCs.
📜 Designing Glean for accessibility – design system and compliance - Positive feedback after migrating their design system to Base UI.
📜 Open-sourcing our microfrontend React bridge - A simple alternative to the Module Federation bridge to help you manage microfrontends using distinct React versions.
💸 Product for Engineers - How startups lose their edge
📦 Rspack 2.0.0-alpha.1 - Built-in support for React Server Components - RSC support also comes with a higher-level RSC plugin for Rsbuild.
📦 ChartGPU - Beautiful, open source, TypeScript WebGPU-based charting library, with React bindings - This new library should be fast for large datasets. However, we are still waiting for Firefox to support WebGPU.
📦 ESLint Plugin React Unhookify - Now that we have the React Compiler, this plugin contains rules to remove useless memoizations and suggests a compiler adoption strategy.
📦 Conform 1.16 - New configureForms future API
📦 shadcn/ui Changelog - January 2026 - Inline Start and End Styles for Base UI components
📦 React Router 7.13 - Add crossOrigin prop to Links component
📦 Storybook 10.2 - New Viewports and Zoom UI, MDX support for Storybook MCP
📦 Next-SEO 7.1 - New HowToJsonLd component for tutorials SEO
🤖 Next.js Skills - Newly published Vercel Agent skills for common Next.js workflows - Skills for the App Router, Cache Components, performance, and more.
🤖 The Missing Next.js AGENTS.md File - Relatedly, Vercel has found that AGENTS.md outperforms Skills in evals for general framework knowledge.
🤖 React Email Agent Skills
🤖 AI Code Elements - Vercel components to build the next generation of IDEs
🎥 Jonny Burger - Creating videos just from prompting - Claude Code and Remotion - Vibe coding videos with Remotion is trending lately. A trend also supported by motion designer trolls posting their hand-made videos as if it only required a single prompt. Here’s a demo from its author. See also this feedback on X from someone who rendered a real product launch video.
🎥 Delba - Next.js Patterns: Public pages with personalization - Greatly explains the usefulness of Cache Components to keep navigation fast. By the way, Delba uses Remotion.
🎥 Shruti Kapoor - React Performance Optimizations: How to Fix a Slow App

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Expo SDK 55 Beta

It's been longer than usual since the last SDK, so this new SDK 55 looks like a significant update. The stable version will be released in about two weeks; until then, you can already check the beta release notes with a long list of highlights:

React 19.2, unlocking <Activity>, useEffectEvent()
React Native 0.83.1, unlocking DOM Node APIs, new DevTools features, Intersection Observers (experimental)
New Architecture only, Legacy Architecture removed
Revamped project template, using native Tabs by default
Hermes v1 opt-in flag, for performance improvements (but slower native build times)
Hermes bytecode diffing opt-in flag, for ~75% smaller incremental OTA updates
AI tooling, MCP server, Agent skills
Expo Router 7 beta with more native features (preview tweet) and web SSR (alpha)
Expo brownfield integration to existing native apps
Expo UI improvements, support for Jetpack Compose coming
Expo Widgets alpha for iOS home screen widgets and Live Activities
… and more

💸 10 Real-World React App Examples to Inspire Your Next Project
🐦 Synchronous TextInput validation in React Native and Expo UI
🐦 CSS calc() support coming to React Native?
📜 Bringing CSS Clipping to React Native - A great deep-dive article that explores what it would take to support masking with CSS clip-path() natively on iOS and Android, covering the whole rendering stack. What a great way to announce upcoming support, with PRs being under review!
📜 Expo EAS - Compiler cache for builds and Workflows - Set an env variable to get 30% faster builds.
📦 Voltra 1.1 - Android widget support, iOS Enhancements
📦 Bootsplash 7.0 - Edge-to-edge by default, improved Expo plugin
📦 create-react-native-library 0.57 - Improved templates, more example app types
📦 Nitro MLX 0.3 - Tool calling
📦 Detox 20.47 - Support for RN 0.83 and iOS 26, new by.type() API for semantic matching
📦 Expo AI Chatbot 2.0 - Incognito mode, long-term memory, upgrades to Expo 54 and AI SDK 5
🤖 Vercel React Native Skills - Agent Skills extracted from lessons of building v0 for iOS, and the upcoming Vercel app
🎥 Software Mansion - First Look at Expo Widgets: iOS Widgets Without Native Code
🎥 Software Mansion - Introducing Expo Brownfield Target – Automate Brownfield Setup in Your Expo App
🎙️ RNR 351 - Transforming Packages to Nitro with Marc Rousavy
🎙️ RocketShip 90 - Expo SDK 55, AI Agent Skills, Tiny Harvest Revenue & Industrial Revolution of Software

🔀 Other

🦋 TC39 - Proposals progressing after the 112th meeting - Upsert, import sync, Error options, and more.
📜 Anchor Interpolated Morph - A FLIP-inspired animation technique using modern CSS.
📦 Rolldown 1.0 RC - The next-gen high-performance Rust bundler now has a stable API. It should become the default bundler of Vite 8.
📦 Remix Component 0.3 - Updated Component API, no stateless component, new setup prop - Interesting to see how the Remix component model evolves and differs from React.
📦 Better All - Better Promise.all with automatic dependency optimization - A clever way to minimize async waterfalls and maximize parallelization.
📦 Yarn 6 Preview - Complete rewrite in Rust, strict compatibility, Yarn Switch, Lazy Installs - Benchmarks show the Rust rewritten version is now faster than pnpm.
📦 Node.js 25.5 - Simplifies building Single Executable Applications (SEA) - See also this deep-dive blog post from the PR author.
📦 Rstest 0.8 - Browser Mode (experimental)
📦 Mermaid Rust Renderer - Much faster than the official Mermaid CLI, no headless browser overhead
📦 Unplugin 3.0 - Unified bundler plugin system - Add Bun plugin support, drop Node 18 and CJS build

🤭 Fun

See ya! 👋

This Week In React #265 : React Skills, json-render, ViewTransition, Base UI, Navigation, Nitro, TC39, Astro, jQuery, Node.js

Sebastien Lorber — Fri, 23 Jan 2026 14:09:22 +0000

Hi everyone!

This week, we saw a lot of activity on X about the new AI skills system. Personally, what excited me most is the new Firefox release that unlocks interesting things for React developers.

The React Native ecosystem is also super active, with many interesting releases. And I’m sure Expo 55 beta will drop just after we send our email 😅, so make sure to check their blog because it’s coming soon.

💡 Subscribe to the official newsletter to receive an email every week!

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⚛️ React

Agent Skills

A new Anthropic spec is gaining traction in the AI dev community. Skills let agents acquire capabilities on demand via progressive disclosure—lazy-loading only what’s needed to keep context slim. It’s been a hot topic in React this week, with multiple projects shipping open-source skills and tooling:

Skills.sh, a platform launched by Vercel to discover popular open source skills
React Best Practices by Vercel for React and Next.js skills. I also liked the related article from one of the authors (Performance Is Not a Technical Problem).
React Native Best Practices by Callstack, including many React Native optimization skills
Expo Skills for Expo apps and EAS projects
Remotion Skills are trending on X, showing that you can vibe code videos with React 🤪

Firefox 147

You might wonder why Firefox is the headline of the React section? It turns out this release is quite important for React developers, unlocking 3 new APIs that are now available in all browsers 🎉:

View transition types - React is relying on it (document.startViewTransition({update, types})) to conditionally enable its <ViewTransition> component. That component is still canary, but once unflagged, it should now work in all recent browsers!
CSS anchor positioning - An awesome addition to CSS that should replace the need for JS-based positioning libraries many React apps used for dropdowns and tooltips, such as Tether, Popper.js, Floating UI…
Navigation API - This completely redefines the APIs used to build client-side routers / SPAs, providing a clean, centralized way to intercept navigation events, instead of using the clunky history API.

💸 10 Real-World React App Examples to Inspire Your Next Project
👀 React RFC PR - useStore/createStore APIs - A POC of implementing a React Store that is compatible with concurrent rendering, for discussion purposes.
👀 Prettier PR - Upgrade MDX parser - Support for MDX v3 is finally coming.
🔨 TanStack Builder alpha: A website to let you assemble your own TanStack visually. It looks like a convenient visual wrapper around create-tanstack-app.
🗓 React Paris - 🇫🇷 Paris & Online - 26–27 March - React Paris is already 50% sold out - Secure your spot at this premier React event before prices increase by €200 and save an extra 10% with code "TWIR".
📜 useOptimistic Won't Save You - An interactive article showing that it’s not so easy to implement optimistic UI correctly, even with the new useOptimistic and useActionState APIs. This requires a good understanding of how React transitions work.
📜 Inside Turbopack: Building Faster by Building Less - Deep dive into the new default bundler of Next.js and its fine-grained and automatic incremental caching system.
📜 Front-end testing at Preply: shifting left towards component testing - Reorganizing front-end testing at scale by moving toward a Storybook-centric component testing approach.
📜 Adapting Library Logic for React Compiler - The author of TanStack Form explains a problem encountered with the React Compiler that was not reported by the ESLint plugin. Using the compiler panicThreshold helped detect this problem more reliably.
📜 Node.js - Mitigating Denial-of-Service Vulnerability from Unrecoverable Stack Space Exhaustion for React, Next.js, and APM Users - Node.js servers relying on AsyncLocalStorage (used by React RSC and Next.js) can eventually be crashed with a single request containing a deeply nested JSON payload processed recursively. They mitigated the issue in v24.13, but still recommend removing potential attack vectors from your app.
📜 Rebuilding the GitHub pull request experience - This dev explores how GitHub’s PR UI could be much faster, especially for large PRs, and shares lessons learned. His Next.js + React 19 demo shows impressive performance compared to GitHub’s current experience.
📜 React Slot/asChild Composition Pattern - The article also highlights how Base UI composition pattern differs from Radix UI.
📜 Can You Fetch Data with React Server Actions? - Not recommended, but technically possible, with caveats: no caching, requests are POST-only and generally processed sequentially by frameworks.
💸 Make React apps fast where it actually matters. Learn how to diagnose real bottlenecks and fix slow, janky React apps using modern React 19 patterns.
📦 json-render - AI-generated UI with guardrails - Vercel introduced a new generative UI library. It lets users generate more complex dashboards, widgets, apps, and data visualizations from prompts, using a React component catalog you provide.
📦 TanStack Router 1.152 - Allow custom fetch() implementation for server functions - This is useful for interceptors, auth, retry, testing and more (docs).
📦 Base UI 1.1 - New features for Autocomplete, Combobox, Select, Field, various bugfixes - By the way, we recently announced Base UI support in shadcn, and Base UI components are now officially documented.
📦 shadcn 3.7 - New npx shadcn registry add command
📦 GTKX - Build native GTK4 desktop apps with React and TypeScript
📦 Puck 0.21 - Visual editor for React - AI page generation, rich text editing, new Plugin interface
📦 Warper - Fast React virtualization library powered by Rust and WebAssembly
📦 React Error Boundary 6.1 - Fix error type (Error -> unknown), add getErrorMessage(e) helper
📦 Apollo Client 4.1
🎥 Maximilian Schwarzmüller - Is TanStack Start better than Next.js?

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📅 React Universe Meetup at Zalando - January 29, Berlin
📜 Huawei x Software Mansion: Bringing React Native Support to HarmonyOS NEXT - Software Mansion helps Huawei bring RN support to their OpenHarmony OS (already powering 27 million devices), ensuring their famous libraries are also compatible (Reanimated, Screens, Gesture Handler…)
📜 Channel surfing for Expo Updates: How to switch update channels at runtime - A technique to let your app’s user decide which Expo update channel to use on their own. You can limit this feature to your employees, for example.
📜 Making AI feel human in a mobile app with Expo, Reanimated, and Skia
📦 React Native Windows 0.81 and React Native macOS 0.81 - Out-of-tree platforms are catching up, enabling the New Architecture by default.
📦 Brownie - Type-Safe Shared State for React Native Brownfield Apps - Creates a single source of truth that lives on the native side, accessible from both TypeScript and Swift. Support for Kotlin is coming soon.
📦 Enriched 0.3 - Rich Text Editor - H1->H6 heading styles, text selection API, custom links detection, and more - See also the newly-released sister project Enriched Markdown that renders Markdown content as native text.
📦 React Navigation 8.0 alpha - Native Bottom Tabs by default, improved types, access to parent screen state, pushParams, and more - Note that since this initial alpha release, alpha.1 has been published and includes even more features: automatic deep links, SFSymbols/Material Symbols, improved screen preloading.
📦 Screens 4.20 - formSheet dynamic content size, a11y & testing improvements
📦 RNSec 1.1 - Path exclusion, incremental scanning, cleaner output, rule ignoring, and more
📦 Audio API 0.11 - Recording to file, new Web Audio API nodes, DX improvements
📦 Teleport - The missing native portal implementation for React Native
📦 Bottom Sheet Stack - Stack manager for Bottom Sheet - Preserves React context, Portal-based API
📦 Nitro 0.32 & 0.33 - View recycling, custom UIView subclasses, Performance & DX improvements
📦 Expo iCloud Storage - React Native wrapper for iCloud's NSUbiquitousKeyValueStore
📦 React Native Testing Library 14.0 beta - React19+, async APIs, new renderer, migration guide available
📦 Native Spring Shaders - High-performance native shader effects for React Native and Expo
📦 Header Motion - An abstraction for scroll-driven header animations
🎥 Callstack - Understanding Threads and Queues in Swift TurboModules
🎥 Expo - AI mobile app development with Replit and Expo
🎙️ React Universe on Air - Shipping v0 iOS: React Native Without Compromises

🔀 Other

📣 The Astro Technology Company joins Cloudflare - Interesting to see another popular framework join a tech giant. It will remain free, open source and MIT-licensed.
👀 TC39 - Agenda for the 112th meeting - Currently in progress, some JS proposals already progressed, such as map.getOrInsert() (stage 4) and import.sync() (stage 2).
📜 The Curious Case of the Shallow Session SPAs: Alex Russell argues that most SPAs shouldn’t be. Data shows that, on average, users produce a single soft navigation after the initial load, and that the upfront cost we pay is probably not worth it.
📜 Stop turning everything into arrays (and do less work instead) - Pragmatic introduction tio iterators.
📜 Web dependencies are broken. Can we fix them?
📜 JavaScript Frameworks - Heading into 2026
📦 Node.js 25.4 - require(esm), compile cache, and various other APIs are now stable
📦 jQuery 4.0 - Remove IE11 support and deprecated methods, slimmer
🔗 Node.js package examples - The Node.js team created a guide on package shipping patterns and how to handle CJS/ESM.

🤭 Fun

See ya! 👋

This Week In React #264 : Next.js | Voltra, 0.84 RC, Hermes, RNSec, Galeria, Nitro | Chrome, Astro

Sebastien Lorber — Fri, 16 Jan 2026 14:18:17 +0000

Hi everyone! Kacper and Filip from Software Mansion here! 👋

It's not too late—we're finally back from our Christmas break, and the entire newsletter team wishes you a happy New Year!

The winter break brought a lot of great articles from the community. While for some, early January is a time for reflection, summaries, and reviews of 2025, others can’t stop shipping.

In the React space, we have a new version of Next.js 16.1, security fixes for React Router, and the announcement of Waku 1.0 alpha.

As for React Native, we have the release of Voltra, a new way to create Live Activities & Widgets, and a sneak peek of React Native 0.84 with Hermes v1 enabled by default.

💡 Subscribe to the official newsletter to receive an email every week!

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⚛️ React

💸 Product for Engineers - Your product ideas probably suck (that's ok)
📜 How to Steal Any React Component: An interactive article that shows it’s possible to extract React Fiber information and feed it to an LLM to reconstruct almost any React component.
📜 Building Type-Safe Compound Components: A convenient API for grouping dialogs, modals, and selects, but it’s not the easiest to ensure their type safety. Dominik suggests using the so-called Component Factory Pattern to provide strong type guarantees.
📜 Experimenting with Bun: From Idea to Production in a Week: A successful case study of swapping Node.js for Bun to run React SSR workloads.
📜 Using React Transitions for low-priority text editor updates: This interactive article shows how to leverage useDeferredValue to render the editor preview with a lower priority to keep the main editor responsive.
📜 Sharing data with Client Components: RSCs can’t use Context directly. Instead, they can pass data (such as the current user) to Client Components that can later expose it as Context. Passing a promise does not block the navigation and improves performance.
📜 Understanding useEffectEvent: How useEffectEvent solves useEffect stale closure problem.
📜 I used a generator to build a replenishable queue: Building a file upload UX with useSyncExternalStore.
📜 How Good Is AI at Coding React (Really)?
📜 Comprehensive introduction to measuring and improving React app performance
📜 How to write good frontend tests: 37 tips and tricks
💸 Building AI Voice Agents at Scale — The executive playbook by ElevenLabs
📦 Next.js 16.1 - Filesystem cache for next dev, bundle analyzer, improved debugging
📦 Immer 11.1 - Performance improvements
📦 React Router 7.12 - Security fixes
📦 Waku 1.0 alpha - Stable API surface
📦 Ant Design 6.2
🎥 React Conf 2025 - All the talks and interviews are now online
🎥 Theo - I moved off of Next.js (to TanStack Start)
🎥 Cosden Solutions - The Better Way to Use React Query
🎙️ Meta Tech Podcast 82 - CSS at Scale with StyleX

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Voltra 1.0 - Live Activities & Widgets with JSX in React Native

Voltra is a new library that allows React Native devs to compose Live Activities and Widgets using SwiftUI primitives in just JSX, without having to write native code.

While previous community attempts, such as expo-apple-targets or expo-live-activity, either supported a limited set of possible layouts or required knowledge of Swift, Voltra overcomes these limitations.

Note that Expo is also working on their own solution for Widgets & Live Activities coming in Expo SDK 55.

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👀 Hermes V1 enabled by default starting from React Native 0.84: A faster Hermes JS-engine added as experimental in RN 0.82 will be the standard in the next stable RN release.
📜 Expo - Cutout camera effects in React Native with Expo Camera and MaskedView: Explanation on how to make parts of UI see-through to the camera feed behind them. This creates the illusion that the phone is transparent.
📜 TikTok-style video feed in React Native: Tips on building a well-optimized short-form vertical video feed using FlashList, directional preloading (5 videos ahead, 1 behind), and aggressive video pausing.
📜 Animating SFSymbol Icons in the native iOS tab bar: The author describes a workaround for animating icons in the native bottom tabs navigator. He had to traverse the native view hierarchy to apply the effect to the base UIImageView.
📜 How to compile JavaScript to C with Static Hermes: It looks like Hermes has valid use cases outside of the React Native world. The creator of Parcel was able to compile the Less.js CSS preprocessor into a C library that he can call from Rust.
📜 Callstack - React Native Wrapped 2025: A Month-by-Month Recap of The Year
📜 Infinite Red - React Native Wrapped 2025: The Year We Entered Our Polishing Era
📜 Software Mansion - React Native in 2026: Trends & Predictions
📦 RNSEC - Security Scanner for React Native: a CLI that scans RN & Expo apps for security vulnerabilities & hardcoded secrets
📦 Facetpack: Promising 36x faster Metro transforms for React Native using OXC in place of Babel
📦 Tickle - AHAP-style haptics for React Native: Supports transient & continuous haptics. Callable from UI Thread.
📦 React Native 0.84 RC.0: Updates to React 19.2.3, lots of accessibility improvements, added onKeyDown/onKeyUp events
📦 Galeria 2.0 - New transition style, corner radius interpolation, page indicators, blur overlay
📦 Nitro 0.33 - HybridViews recycling and UIView subclasses support
📦 Radon 1.15 - Run Maestro tests directly in Radon
📦 Sonner Native 0.23 - Toast library - Added positionStyle prop
📦 Rock 0.12 - Brownfield-ready modular toolkit - Support for RN 0.83 & 0.82
🎥 Simon Grimm - Choosing the Right React Native Stack in 2026
🎥 Building v0 iOS and Fixing React Native Along the Way
🎙️RNR 350 - React Native Wrapped 2025

🔀 Other

📊 2025 JavaScript Rising Stars
📖 The Concise TypeScript Book - an interesting alternative to the official TypeScript documentation.
📜 Logging Sucks - an opinion piece about good logging practices in the age of distributed systems.
📜 require(esm) in Node.js: from experiment to stability - Deep dive into challenges of bringing require(esm) into a stable version of Node.js.
📜 Signals vs Query-Based Compilers - A comparison of 2 different approaches to building incremental systems.
📜 NPM to implement staged publishing - The future plans for protecting against supply chain attacks.
📦 Chrome 144 - New <geolocation> element, Temporal API, and devtools improvements.
📦 Astro 6 beta - Redesigned dev server experience
📦 Turborepo 2.7 - DevTools, composable config
📦 Rspack 1.7 - Final version before v2

🤭 Fun

See ya! 👋