Back after a little break to cover news from the last two weeks. A lot is going on, apparently not everyone is on holiday because we still have many interesting releases, including many RCs from upcoming major versions.

The native React Compiler rollout continues. React v19.3 seems around the corner. Plenty of TanStack Router/Start and Next.js content.

React Native 0.87 is now out, paving the way for v1.0.

🏝️ We’ll be taking another break next week. See you in September. 👋

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

• 🦋 Bluesky
• ✖️ X / Twitter
• 👔 LinkedIn
• 👽 Reddit

💸 Sponsor​

From 57 bugs to 1, thanks to Seer

True story. Dan Mindru got a GitHub notification at the dentist, skimmed a green PR he hadn't written, and hit merge before his name was called. That was one of 57 bugs in his backlog. He's down to 1 now, and his system sorts every production bug into three tiers:
😎 Friendly: the null check, the off-by-one, the layout that breaks on mobile. The PR is waiting when you wake up.
😤 Grumpy: stale state after a websocket reconnect, optimistic UI that never rolls back. Seer can root-cause these, but it can't run your tests. Something else has to.
🤘 Punk: five-year-old prod data, one customer's flag combo. Still yours, sorry.

Read the post →

⚛️ React​

The React Compiler rollout

The rollout of the Rust-based compiler continues:

• Oxlint 1.79 just added support. The new oxc-transform-react package also unlocks automatic memoization and will soon be supported in @vitejs/plugin-react (PR already merged). Along the way, they made many improvements to performance and behavior over the original Rust port and even found bugs in the Babel version.
• Biome 2.5.8 is out with a new useReactCompiler nursery/experimental rule, although it’s an initial version and there’s remaining work to be done such as splitting the rule into many smaller ones.
• Bun 1.4 will include React Compiler support through --react-compiler and Bun.build({reactCompiler: true}).

• 💸 build mode - Why we're bullish on loops
• 👀 React PR - Enable parallel transitions flag everywhere - Parallel transitions are already used in production at Meta, and are likely to come in v19.3 for both React and React Native.
• 👀 TanStack Router reimplemented - Prominent Node.js contributor Yagiz Nizipli reimplemented TanStack Router APIs, claiming a drop-in replacement up to 19x faster. Tanner Linsley answers.
• 💬 Next.js team - Ask us anything on Reddit and Ask us anything on X- Apart from the many Next.js-related discussions, happy to hear that Fragment refs and ViewTransition will be stable in React 19.3! Also gives a preview of upcoming features such as granular prerendering and new data fetching primitives.
• 💬 React Router - Changes planned for v9 - This discussion will keep track of what’s coming in the next major, scheduled for mid-2027.
• 🐦 Cursor completed its migration from Solid (v1) to React and StyleX - In practice, signal-based approaches created perf footguns. Their new product “Bot” forbids the direct usage of useEffect.
• 🗓️ React Summit US - 🇺🇸 New York - 17 & 20 Nov. Incredible lineup announced featuring Kent C. Dodds, Shaundai Person, Ken Wheeler, Tanner Linsley, and Seth Webster! Get a 10% discount with code "TWIR".
• 📜 Impersonating the DOM - A quite interesting lib design technique used by React Aria. createPortal(children, fakeDocument) lets you eavesdrop on the reconciler operations and get access to the rendered children. This pattern lets you do various things, such as hoisting/deduplicating SVG <defs>.
• 📜 How Lovable.dev moved from Next.js to TanStack Start - Lovable builds and hosts primarily TanStack Start apps, so they decided to adopt the framework for their flagship app to dogfood their own platform and turn it into a typical Lovable app. This describes the incremental migration approach: making the code framework-agnostic, using agents, migrating related routes together, and ensuring both frameworks can run simultaneously. The migration brought better DX/AX and simpler abstractions, but TanStack Start requires more bundler customization.
• 📜 Making Navigations Instant in v0 - Next.js 16.3 now supports pre-rendering dynamic content at runtime, making navigation feel instantaneous. Assert this behavior with a new Playwright instant() helper, and let your AI agents fix the failing tests with the provided skill.
• 📜 Reliable Query Prefetching with TanStack Router - Reliable prefetching requires using the same query options in the route loader prefetches and component queries, which may diverge at scale. Put query options in Route Context to keep them in sync.
• 📜 Inside a TanStack Router Navigation - Explains the lifecycle of a navigation and how edge cases are handled, such as using a transaction and private lane system to handle race conditions.
• 📜 Building App-like Experiences with Next.js 16.3 - A nice overview of all the cutting-edge Next.js features useful to build modern web apps, illustrated through 4 open source app demos.
• 📜 Coordinating Optimistic Updates in Next.js - Use useActionState and useOptimistic to coordinate overlapping transitions with an Action queue, a reducer, and optimistic state with automatic rollbacks. Not so easy to wire, but this pattern can be learned once and applied in many places.
• 📜 Using next/root-params in Next.js 16.3 - A game-changer for next-intl, that can now read a [locale] param of a root layout in all Server Components.
• 💸 TrustedRouter - Add every AI model to your React app through one OpenAI-compatible API with automatic failover and no prompt or output logs
• 📦 OXC for TSRX - Parse, lint, format .tsrx files with Oxc - This promising spiritual successor to JSX now has a fast Rust-based toolchain.
• 📦 GTKX 1.0 - The React framework for Linux, declarative layer on top of GTK4
• 📦 Unhead 3.3 - Framework-agnostic <head> component - Support <Fragment>, various React fixes
• 📦 Astryx 0.3 & 0.4 - Meta’s fully customizable design system based on StyleX
• 📦 React-Hook-Form 7.85 - Support React <Activity>
• 📦 shadcn React 0.3 - New <Questionnaire> component for multi-step question flows
• 📦 Fig - A small TypeScript UI runtime based on React Fiber.
• 📦 Rshono - Minimalist web framework based on Hono, Rspack and React Server Components
• 📦 Sugar High 2.0 - Lightweight, composable syntax highlighter with React bindings
• 📦 TanStack Form 2.0 alpha - Redesigned APIs, new validation pipeline, performance and type-safety improvements
• 📦 Preact 11.0 RC - use(), createPortal(), useEffectEvent(), and more
• 📦 Humid 1.0 - React server-side rendering in Rails using V8 / mini_racer
• 🎥 Lucas Barake - The state library that made me drop Zustand - Effect v4 is now in RC, comes with a reactive Atom implementation including first-class React bindings.
• 🎙️ This Month in React - July 2026 - React-alikes, governance, and state management

💸 Sponsor​

New Speakers & Pre-Conference Workshop

Carl Ross (OpenAI) and Nick Miller (Cursor) have recently joined the lineup, alongside other top AI engineers from Google, Meta, Amazon, Expo and other tech giants.

Agenda is now almost full with talks covering 4 main angles:

• Vibe Coding
• Agentic Engineering Fundamentals
• Orchestration & Multi-Agent Systems
• Adoption & Case Studies

The last few spots are still available for the free workshop hosted by Amazon on September 16: Build Your Own Software (re)Factory. First come, first served! Book your spot at agent.sh/workshop.

Join Agent Conf in Warsaw on September 17–18 to get better at coding with AI agents.

Conference tickets are available at agent.sh.

📱 React-Native​

React Native 0.87

Like clockwork, React Native 0.87 is out! It's the biggest step towards RN 1.0 in a long time, coming with intentional breaking changes, so it deserves more than a routine upgrade note.

• Strict TypeScript API by default: Types are generated automatically from source and scoped to the package's root, so internal file changes are no longer breaking changes. Dedicated *Instance types (e.g. ViewInstance, TextInputInstance) improve ref typing of built-in components, and doc comments now flow straight into your IDE. Alex Hunt goes into detail about the work that went into this: compatibility fixes for Tailwind, Uniwind, and Expo Web, plus an upstream TypeScript fix for hidden Libraries/ subpaths.
• Faster, leaner Metro: Source map generation is now 2x faster and uses half of the memory. Support for TypeScript and ESM config files.
  Experimental Swift Package Manager support for iOS: Opt-in and additive: Xcode is enough — no Ruby, no Bundler, no CocoaPods. CocoaPods remains the default path.
• Android Gradle Plugin (AGP) v9: First RN release to support AGP 9, with recommended opt-outs for built-in Kotlin and the new DSL until AGP 10.x.
• API surface cleanup: Many deprecated APIs have been removed, including flagship ones like InteractionManager. New APIs are marked as deprecated and scheduled to be removed later. AbortController is now complete and backgroundImage: linear-gradient/radial-gradient is now stable.
• New requirements: The minimum toolchain requirements is now Node.js 22, AGP 9, and Kotlin 2.0+.

• 💸 Crisp - Add in-app customer support to your React Native or Expo app in just a few lines of code
• 📖 RN docs - Strict TypeScript API guide updated for 0.87: ref types, setup-env, FAQs
• 🗓️ React Native Connection - 🇫🇷 Paris - 24 Sept. Deep dive into mobile development with top-tier experts from Expo, Software Mansion and Callstack. Regular ticket window closing August 31. Save 15% on your ticket with code "TWIR".
• 📜 Fitting RAG in Your Pocket: Local Retrieval in React Native - How to build on-device data retrieval for your apps using @react-native-ai/llama and native vector search with nitro-sqlite + sqlite-vec
• 📜 The Memory Hermes Can't See: Stale Shadow Nodes in React Native - Recent Hermes V1 memory regression triggered additional experiments that surfaced a fascinating finding about the Shadow Tree. Unmounting views causes the React component and the objects attached to it to still exist in memory, which can only be cleaned up by GC run.
• 📜 How we raised mobile end-to-end test stability to 98% - Shopify stopped patching their Appium E2E suite to fix flaky tests with an opinionated wrapper. They moved away from testing implementation details with TestIDs to using computer vision.
• 📜 How to build a resilient activity tracker with Expo - Build an Expo app with sessions that survive backgrounding, app kills, and crashes.
• 📜 Scanning Barcodes in React Native Apps: The Complete Guide (2026)
• 📜 Fable 5 vs GPT-5.6 Sol: I spent $2,000 and 2 billion tokens to find out who wins
• 📜 Haptic Feedback on the Web: Why the Web Deliberately Refuses to Be as Tactile as Native Apps
• 💸 ConfigCat - Release React Native Features with Feature Flags, Without Redeploying
• 📦 Firebase 26 - New architecture foundation: TurboModules, TypeScript parity, modular API
• 📦 Skia 2.11 - Updates Skia engine, drive multiple animated props from one shared value
• 📦 Rozenite 2.1 - Unified plugin UI, feature flags plugin, agent skills CLI
• 📦 Sentry 8.23 - Swift pod migration - Action required for RN < 0.75, use_modular_headers! is required in the Podfile now that RNSentry ships Swift
• 📦 Screens 4.27 - RN 0.87 support, experimental ScrollToTopGuard
• 📦 Maestro 2.8 - Swipe from a point inside an element, variables in permissions, screenshot tresholds, and Maestro Cloud improvements
• 📦 Enriched Markdown 1.0 - First stable release: block-editing input pipeline, iOS SwiftUI renderer
• 📦 Pager View 9.0 - Replaces legacy pager implementation with Jetpack Compose on Android
• 📦 Gesture Handler 3.2 - Pressable on Touchable, hover callbacks, Strict TS API, AGP 9
• 📦 Worklets 0.12 - WeakRef on worklet runtimes, Bundle Mode loading on par with RN, enableLocking option
• 📦 Nitro Fetch 1.6 - tvOS support, shared iOS URLCache, prefetch cache fixes
• 📦 Expo Pretext 1.2 - Fixes Android module that never compiled, web font measurement fix
• 📦 Argent 0.20 - Concurrent flow recordings, Chromium per launch step, MCP registry, .env secrets
• 📦 Safe Area Context 5.9 - AGP 9 support, web resize/inset fixes
• 🤖 Expo Tuft - Higher-order agent reachable from Slack/iMessage, runs on an always-on machine - Technical preview of a new Expo AI product.
• 🤖 MargeloChat - Open-source ChatGPT-style RN AI chat app with RAG and streaming
• 🤖 iOS Simulator MCP 2.1 - App lifecycle tools: terminate_app, open_url, list_apps
• 🎥 Callstack - Can a Specialized Model Beat Frontier Models at React Native?
• 🎙️ RNR 369 - AppRegistry Explained - Breaks down RN’s AppRegistry. What’s under the hood. From Expo and app entry points to brownfield apps and more.
• 🎙️ RNR 370 - CopilotKit with Mike Ryan - Bringing AI agents to RN apps. Breaks down of AG-UI, generative UI, shared state, and the guardrails needed for trustworthy experiences.

🔀 Other​

• 📜 CSS: the bomb inside your inbox - Novel hacking techniques showing how CSS sanitizers in Gmail/Outlook/Fastmail can be worked around to steal tokens, hijack clicks, or keylog passwords.
• 📜 How Variable Mangling Works in Oxc Minifier - Replacing original variable names with shorter ones with a slot assignment algorithm.
• 📦 Node.js 26.7 - Perfetto tracing support
• 📦 Astro 7.2 - Incremental static builds, opt out of session support
• 📦 pnpm 12.0 RC - pnpm 12 has been rewritten in Rust and should be easy to adopt, apart from 5 things that differ.
• 📦 Vitest 5.0 RC - Clear mocks by default, fake timers now mock Temporal, and more - Stable version expected in 2-3 weeks, check the full v5 migration guide.
• 📦 Solid 2.0 RC - First-class async support, new Rust-based compiler toolchain, simpler API surface
• 📦 SvelteKit 3.0 RC - Vite 8 + Rolldown, error boundaries, validated env vars, remote functions

🤭 Fun​

See ya! 👋

This week, Next.js 16.3 officially shipped, bringing Instant Navigations to the App Router and cutting dev server RAM usage by up to 90%.

On the React Native side, a new, faster PlainText component and a deep dive into Vision Camera v5.

Across the broader dev ecosystem, GitHub stacked PRs finally entered public preview with native base retargeting and a gh-stack CLI.

Let's dive in!

🏝️FYI: we’re taking a break next week; see you soon!

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

• 🦋 Bluesky
• ✖️ X / Twitter
• 👔 LinkedIn
• 👽 Reddit

💸 Sponsor​

Ship AI generated code safely with Meticulous.

Claude writes your code. Claude reviews your code. Claude fixes the review comments. And somehow, you're the one getting paged at 2am when it breaks in prod.

Fortunately, top AI-driven teams like Dropbox, Notion, LaunchDarkly, and Wiz rely on Meticulous to run 1000s of e2e UI tests autonomously, covering every user flow, edge case, role and permutation. Built by ex-Palantir engineers, Meticulous gives you near-exhaustive coverage in weeks, without any developer effort. 

It works like magic in the background:

• Near-exhaustive coverage on every test run
• No test creation
• No maintenance (seriously)
• Zero flakes (built on a deterministic browser)

Check it out - and see why one engineering leader at Dropbox said that “once we started using Meticulous, we couldn’t imagine working without it.”

⚛️ React​

Next.js 16.3 - Instant Navigations and 90% less RAM in dev

Next.js 16.3 officially shipped with major engine and runtime upgrades. Long dev sessions now use up to 90% less RAM. Turbopack now supports Vite-like import.meta.glob(), and rebuilds get faster thanks to artifact caching. SSR handles up to 22% more requests. TypeScript 7 is supported by default through a new tsc CLI integration. Various AI improvements include versioned docs for agents, skills, and actionable errors. There are also new APIs such as catchError to create custom error boundaries, and next/root-params useful for i18n.

The core release focuses on Instant Navigations (built on top of Cache Components) to give server-driven apps the snappy responsiveness of an SPA. This signals a clear architectural shift for Next.js: returning to a dynamic-by-default model with fully explicit, predictable caching.

TanStack Table V9

This new major version is finally here, after more than 2 years of work. It lays a new foundation for years to come, with a tree-shakable plugin architecture, state management powered by TanStack Store, new features, major performance improvements, hundreds of bug fixes, and more.

As a framework-agnostic lib, it comes with many framework-specific adapters, including new ones. The existing ones have been refreshed around a new reactivity model. For React developers specifically, it now supports React 18+, works well with the React Compiler, and unlocks more granular reads based on atoms/selectors to avoid useless re-renders.

• 💸 TrustedRouter - Build AI features with hundreds of models through one OpenAI-compatible API with failover and no prompt or output logs
• 👀 React Core PR - browser() API - Exposes a client-only react-dom API to safely suspend SSR for browser-specific components, eliminating hacky server error-suppression workarounds.
• 📜 React 19’s useActionState: Preventing Sequenced Double Submits - Explains how React 19’s useActionState queue behaves and how to handle isPending states to prevent duplicate submits.
• 📜 Next.js 16 useOptimistic: Fixing Rapid-Click Race Conditions & Auto-Rollbacks - Covers React 19 optimistic UI edge cases, demonstrating why manual rollback logic is redundant, how to prevent overlapping requests per item, and how to handle Next.js 16 cache revalidation with updateTag.
• 📜 Visual Regression Testing: The Most Important Test You're Not Running - demonstrates how visual regression tests catch layout and CSS bugs missed by functional tests, with setup examples for E2E test runners and component environments.
• 📜 React Arven: Optimizing React Context Performance for Complex Local State - Introduces a 1.4 kB dependency-free library that uses useSyncExternalStore and stable action refs to eliminate React Context re-renders when orchestrating complex local state.
• 📜 Architectural Patterns for Generative UI in React - Breaks down 3 approaches to letting LLMs build UI dynamically — schema-constrained output, a declarative JSON spec (A2UI/AG-UI), and open-ended sandboxed code generation
• 💸 build mode - Stop being the code review bottleneck
• 📦 TanStack Charts pre-alpha - Minimal ~8 KiB core, framework-agnostic charting primitives on D3, with first-class React bindings
• 📦 React Aria 1.20 - Adds PreviewTrigger popovers, TokenField for inline tags, native context menus, interactive table rows, and Next.js 16 RSC collection support
• 📦 React Three Fiber 9.7 - Hardens its reconciler to align with react-dom, fixing child desyncs, prop resets, and event priority
• 📦 use-webmcp-tool - Experimental project from the Chrome team, a React abstraction for exposing client-side tools to browser AI agents via WebMCP
• 📦 MobX 7.0 - Drops legacy compatibility, reduces ESM bundle size while maintaining the mobx-react-lite vs mobx-react architecture
• 📦 SWR 2.5 - Adds experimental RSC data preloading to hydrate client cache without duplicate requests, plus a new unload() API to purge cache and abort in-flight queries
• 📦 React Hook Form 7.84 - Enhances <Form /> submit behavior, improves performance, reduces bundle size
• 📦 BaseUI 1.7 - Reduces bundle size (~3%), enhances mobile UX and <ScrollArea.Thumb> overscroll feedback, and bundles accessibility and bug fixes
• 📦 Astryx 0.2 - RTL auto-mirroring with a dedicated ESLint rule, tooltip status variant for inputs, scriptable CLI engine APIs, removed TabList orientation and CLI JSON types
• 📦 React Bits upgrade - 27 new React components for creative developers
• 📦 Styled Components 6.5 - Much faster type-checking, stricter RN styles, new CustomStyle type helper

💸 Sponsor​

Stop Rebuilding Forms for Every Business Change

Hardcoded forms create a costly cycle: every new field, workflow, validation rule or customer-specific variation becomes another development task, code review and deployment.

SurveyJS breaks that cycle. Developers embed a JSON-powered form builder and reusable form runtime into their React application once. Business teams can then create and update forms through configuration rather than application code.

• Ship new forms faster
• Reduce repetitive frontend work
• Launch form changes without waiting for a release cycle
• Keep full control over your backend, data, security, and branding

Your developers own the platform. Your business teams manage the forms. 🙂

📱 React-Native​

• 💸 Crisp - Add customer support chat to your React Native app with our SDK for iOS, Android and Expo
• 🐦 Faster touchables in Gesture Handler coming soon - RNGH’s Touchable rendered ~300ms faster than RN’s Pressable in a list with 1000 buttons in one of the benchmarks, definitely worth keeping an eye on this!
• 👀 Simulators for agents from Expo coming soon - Expo announced a waitlist for on-demand cloud simulators. This helps AI agents build, run, and visually verify app changes.
• 📖 Gesture Handler Docs - New interactive docs on callbacks & events - You can now see the callbacks chain and get a better understanding of how they resolve.
• 📜 Building a Real-Time Face Recognition App in React Native with VisionCamera - a full on-device pipeline built on VisionCamera's frame processors, ONNX Runtime, and OpenCV - with real benchmarks and hard-won lessons like mirrored-frame bugs.
• 📜 Migration to React Native in 2026 Starts With a Delivery Question: brownfield vs. greenfield migration is a choice around how you ship. Also, a useful take on where AI agents help the port - and where they don't.
• 💸 ConfigCat - Run A/B Tests in React Native Apps with Feature Flags and Amplitude
• 📦 React Native Plain Text - A faster, lower memory alternative to use for simple texts, currently limited to static, single-style text. It’s faster than RN’s core `<Text>` component, and also outperforms the raw NativeText/RCTText according to 𝕏 the author's benchmark.
• 📦 Enriched HTML 1.1 - Stable web support with full feature parity
• 📦 React Native Firebase App 26.1 - migrated to turbo Modules, requires new architecture
• 📦 React Native System Navigation Bar 3.0 - Rewritten on new architecture
• 📦 React Native Blur 5.0 - Requires new architecture and RN 0.80+, raw native components deprecated, added ref forwarding and react-native-web support
• 📦 Sentry 8.21 - Improved session replay details
• 📦 Argent 0.18 - Rotate directive for flow automation, single-element snapshot diffs, human-readable tool-server logging, CSS combinator flow selectors
• 📦 Voltra 2.2 - Improved build stability, runtime props support
• 📦 React Native Purchases 10.6 - Supports multipage paywalls
• 📦 React Native Ease 0.8 - Initial velocity for spring transitions, iOS retain-cycle fix
• 🤖 AppControlBench - Compare models, tools, cost, and test runs across real iOS app-control tasks - AI benchmark comparing the performance of tools such as Argent and Agent-Device with various models.
• 🎥 Callstack - Build a React Native News Agent With Eve
• 🎙️ React Universe on Air - VisionCamera V5 With Marc Rousavy

🔀 Other​

• 📣 GitHub stacked PRs now in public preview - Adding native PR stacking with automatic base retargeting, partial merges, and official CLI (gh-stack) integration.
• 📜 Declarative Route and Navigation Matching in CSS - A proposed W3C CSS spec that moves route-based view-transition logic out of JS.
• 📜 Disrupting supply chain attacks on npm and GitHub Actions - Summary of the changes shipped across npm and GitHub Actions in the past few months, aimed to disrupt supply chain attack techniques and limit their impact.
• 📦 Flue 2.0 - “React for Agents” - introduces a hooks-based architecture (useModel, useTool, usePersistentState) that replaces static configuration with dynamic agents capable of swapping models and capabilities at runtime.
• 📦 SolidStart 2.0 - Modernizes the foundation for building full-stack applications with Solid v1
• 📦 Node 24.19 - Stabilized stream.compose, new TLS/TCP configuration options, --experimental-import-text flag, custom buffers in fs.readFile()
• 📦 scriptc - Compile TypeScript to tiny native binaries (no Node/V8)
• 📦 Vite 8.2 - Top-level input option (bypassing build.rolldownOptions), warns for unsupported native loader features, PostCSS config types, and dev URLs labeled by interface
• 📦 Hono 4.13 - Up to 1.25x perf gains, adds HTTP QUERY method support, a Method Not Allowed middleware, and various improvements
• 📦 pnpm 11.20 - Fixes multi-registry package substitution vulnerability with registry-qualified keys

🤭 Fun​

See ya! 👋

This week we have an interesting React challenger, keeping its mental model but compiled ahead of time. Also various major announcements from the TanStack side.

On the mobile side, we have interesting RN 0.87 PRs to look at, discussions around workers / worklets, a WebGPU/Skia integration, and React Navigation 8 / Screens 5 progress.

Last week, many proposals progressed during a TC39 meeting. npm is going to scan for malware at publish time. Core Web Vitals will now measure SPA soft navigation.

Let's dive in!

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

• 🦋 Bluesky
• ✖️ X / Twitter
• 👔 LinkedIn
• 👽 Reddit

💸 Sponsor​

Ship AI generated code safely with Meticulous.

Claude writes your code. Claude reviews your code. Claude fixes the review comments. And somehow, you're the one getting paged at 2am when it breaks in prod.

Fortunately, top AI-driven teams like Dropbox, Notion, LaunchDarkly, and Wiz rely on Meticulous to run 1000s of e2e UI tests autonomously, covering every user flow, edge case, role and permutation. Built by ex-Palantir engineers, Meticulous gives you near-exhaustive coverage in weeks, without any developer effort. 

It works like magic in the background:

• Near-exhaustive coverage on every test run
• No test creation
• No maintenance (seriously)
• Zero flakes (built on a deterministic browser)

Check it out - and see why one engineering leader at Dropbox said that “once we started using Meticulous, we couldn’t imagine working without it.”

⚛️ React​

Octane – React's programming model, compiled

Dominic Gannaway – former React/Svelte team member, creator of Inferno – unveiled his new project, Octane, as a successor to Inferno.

It keeps React’s programming model, but compiles Hooks, Suspense, and Actions ahead of time. It improves performance, removing the Virtual DOM and using native browser events. You don’t need to respect the rules of hooks or to maintain dependency arrays manually. You can use it with JSX/TSX, but it also supports TSRX to improve your developer experience.

This looks like a quite serious React challenger using the same mental model, already receiving contributions from maintainers of popular project. It comes from day 1 with integrations for libraries such as TanStack, React Three Fiber, Lynx, StyleX, NativeScript, and more.

• 💸 Sentry - Stop logging everything. Learn what's worth capturing and how to structure it properly.
• 👀 Next.js docs preview - Offline support - With experimental.useOffline enabled, Next.js will no longer throw when the network is down, keeping requests pending with a retry.
• 🗓️ React Advanced London - 🇬🇧 London - 23 & 26 Oct. First speakers announced: TanStack Maintainer, Engineer at Vercel, Apollo TypeScript Client maintainer & more. All in a historic ex-brewery. Get 10% off with code "TWIR".
• 📜 TanStack - We Stopped Using RSC on TanStack.com - Tanner explains why the TanStack website adopted RSC in the first place, keeping heavy dependencies like the Shiki syntax highlighter on the server. But the maths change if the heavy libraries become smaller: it’s better to use SSR, ship a small lib once and render multiple times on the client than to render each blog post on the server and ship an RSC/Flight payload. To achieve better performance with SSR, TanStack had to introduce 2 new deliberately small projects: TanStack Markdown and TanStack Highlight, available in alpha. In TanStack Start, you can freely decide to use SSR or RSC when it makes sense.
• 📜 Making Referential Stability a Type - A really cool idea to tag memoized values directly in the type system with Stable<T>. With stableref/react, you can enforce APIs to use memoized values and get compilation errors if props or dependency array elements are not memoized.
• 📜 Experimenting with RSCs for Performance and UX in Next.js - 3 Next.js 16.3 experiments to keep work on the server: pagination via ?page=, a search field that keeps focus while results stream, JSX from actions.
• 📜 How to find a Next.js memory leak in production - 3 memory leaks in Next.js and how to spot each in heap snapshots. These have recently been fixed by Dan Abramov for v16.3.
• 📜 The state of zero-runtime CSS-in-JS, mid-2026 - A recent field map of compile-time CSS-in-JS covering Vanilla-Extract, Panda CSS, StyleX, next-yak, Linaria, dx-styles.
• 📜 How to Think in Remix UI Instead of React - A pragmatic intro to Remix v3 from a React perspective. Components run once, return a render closure, and you re-render with this.update(). This gives you more control than React hooks, but requires more boilerplate.
• 📜 The Absolute State of Management - Alex Russel argues React's state management libs don't manage state; they only propagate it with pub/sub. Real state management needs time and ordering: CRDTs, sync engines, vector clocks.
• 📦 Canvas UI - Creative components based on WebGPU and HTML-in-canvas - A cool project for creative work. Framework-agnostic, coming with first-class React integration.
• 📦 TanStack Table v9 beta.58 - Support Cell Selection and Keyboard Navigation
• 📦 React Router 8.3 - RSC Entry Updates
• 📦 Reassure 1.6 - Performance testing for React and React Native - Stability measures
• 📦 Astryx 0.1.8 & 0.1.9
• 🎥 Jack Herrington - TanStack is Doing What? - Stream announcing TanStack changes with guests. TanStack now has a new look, a design system, and a lead designer.
• 🎥 Shruti Kapoor - React Debugging with Performance Tracks

💸 Sponsor​

Stop Rebuilding Forms for Every Business Change

Hardcoded forms create a costly cycle: every new field, workflow, validation rule or customer-specific variation becomes another development task, code review and deployment.

SurveyJS breaks that cycle. Developers embed a JSON-powered form builder and reusable form runtime into their React application once. Business teams can then create and update forms through configuration rather than application code.

• Ship new forms faster
• Reduce repetitive frontend work
• Launch form changes without waiting for a release cycle
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📱 React-Native​

• 💸 PostHog - The do's and don'ts of minimum viable product marketing
• 💬 React Native RFC - CSS calc() in React Native - A proposal to add a C++ implementation, so host platforms do not need to be aware of its existence. Aligns more closely with the web, avoiding onLayout and useless render passes.
• 👀 React Native PR - Add SafeAreaProvider, safe-area hooks, and SafeAreaView edges/mode - 2 recent PRs show that SafeAreaView will either be removed from core, or improved to catch up with react-native-safe-area-context features. We are still not sure which PR will be merged; stay tuned.
• 👀 RN Screens 5.0 Alpha - Rewritten Stack implementation, Android based on Material Design 3 - The first release of an upcoming rewrite of RN Screens. The redesign of the Native Stack addresses shortcomings of the v4 model and will be an important piece for React Navigation v8.
• 👀 React Native PR - backgroundImage stable in RN 0.87 - linear and radial gradients will officially work without the need for 3rd-party dependencies.
• 👀 React Navigation PR - v8 will work on Web without React Native Web
• 📖 React Navigation 8 - New docs on Suspense and pending UI
• 📜 From Expo Router to Detour: Deferred deep linking the right way - Standard deep links break at the store boundary, causing an Installation Gap when the app is not installed yet. The solution is to use deferred deep linking to capture user intent and replay it on the app’s first launch.
• 📜 Marc Rousavy just wanted to build react-native libraries but ended up fixing bugs in Apple/Swift compiler... - A compiler bug caused iOS 16 to crash the app in production. The optimizer hoisted a weakly imported constant above its #available guard. Although the issue is real, it was possible to work around it, requiring an upstream compiler fix.
• 📜 Install dev and production side by side with app variants - A guide to setting up app variants for improved dev experience.
• 📜 Why We Did Not Move MMKV Writes to a Worklet: The Serialization Cost
• 💸 ConfigCat - Release React Native Features with Feature Flags, Without Redeploying
• 📦 RN Workers 1.0 Alpha - Separate Hermes runtimes created on a dedicated thread to enable real multithreading. Each worker has its own bundle. Communication between them is using messages via a structured-clone codec. This discussion explain differences with Worklets. Hermes also supports WebWorkers out of the box (unstable) that will be in a public release soon.
• 📦 React Native WebGPU 0.7 - importDevice() - This lets you import the RN Skia Graphite WebGPU device. It’s the foundation for zero-copy interop between the two worlds, letting you use WebGPU textures in Skia efficiently.
• 📦 Skia 2.10 - Migrates from HostObject to JSI NativeState, requires Reanimated v4 - Related: Tzvetan Mikov previously explained why the Hermes team strongly favors JSI NativeState over HostObject.
• 📦 VisionCamera 5.2 - New SkiaCamera controls (zoom, exposure, torch), stretch GPU Resizer mode
• 📦 Nitro 0.36.2 & 0.36.3 - Faster Record<K,V> conversion, RN 0.87 support, drops @FastNative from Sync callbacks
• 📦 Expo Open OTA 3.0 - Self-hosted Expo Updates server with multi-app, rollouts, A/B testing
• 📦 Argent 0.17 - Screen recording tools, pinch gesture, Windows support for Android and Chromium
• 📦 Canvas Kit - A batteries-included 2D canvas framework built on RN Skia
• 📦 React Native Social Auth - Sign in with Google for Android, iOS, Expo
• 📦 Memory Footprint - Measure React Native app's memory footprint on iOS and Android
• 📦 Maestro 2.7 - MCP tool to debug Cloud runs with your AI agent, per-flow debug artifacts
• 📦 Radon 1.18 - Send props, styles, state & errors from element inspector to AI chat context
• 📦 Agent Device 0.20.1 - Vega OS support, broader physical iOS support, secret-safe replay and recording improvements
• 📦 Screen Transitions 3.9 - Teleport-powered handoff and escapeClipping, simplified Boundary API, navigation zoom
• 📦 Sentry 8.20 - iOS screenshot regression fix, Gradle Configuration Cache compatibility
• 📦 Nitro Fetch 1.5.3 - 3x faster streaming via shared URLSession
• 🤖 Maestro CLI 2.7 - MCP for AI Coding Agents
• 🎥 Expo - How to add an iOS Widget to your app
• 🎙️ RNR 368 - RNR Explains: Fabric - A look into how the Fabric renderer works. How it speeds up mobile apps and unlocks concurrent React features.

🔀 Other​

• 🦋 TC39 advanced Promise.allKeyed, Error.code, Map.take, RegExp Linear Matching, and more - I reply and explain why I’m excited about allKeyed, RegExp Linear Matching, and Composites moving to an interning-based approach (getting closer to the former Records & Tuples proposal).
• 📣 Core Web Vitals - Measuring soft navigations - Measuring SPA soft navigations (page transitions with history.pushState) will be enabled by default in Chrome 151, and integrated into DevTools, the web-vitals package, Lighthouse, PageSpeed Insights, and Real User Monitoring tools.
• 📣 GitHub - npm publish-time malware scanning and dual-use metadata - Newly published packages will be automatically scanned before they become available, introducing a delay of 5-15 minutes between publishing and availability.
• 📊 State of CSS - Survey results
• 📜 ECMAScript Deferred Module Evaluation with import defer - This lazy module evaluation feature is stage 3, already implemented in most tools, and close to becoming part of the standard.
• 📜 Your SPA Is Leaking Memory. Soak Test It - A practical Playwright recipe to catch SPA memory leaks. Loop a user flow, read Chrome's node/listener counts before and after, assert.
• 📦 Playwright 1.62 - New component testing model, AbortSignal, WebP screenshots, isolated retries
• 📦 Webpack 5.109 - Built-in CSS, HTML, TypeScript support enabled by default, Vite-compatible import.meta APIs, asset query suffixes
• 📦 Firefox 153 - Picture-in-Picture, import as text, popover="hint"

🤭 Fun​

See ya! 👋

This week we have React and Next.js security patches. React Aria becomes first-class in shadcn. A benchmark grades coding agents at real React tasks. The rise of TSRX and its upcoming framework.

On the mobile side, Swift Package Manager support is finally coming.

A TC39 meeting is in progress, we'll share the proposal updates next week. Oxlint type-aware linting is ready for prime-time. Meanwhile, Yuku explains how it outperforms Oxc at parsing JS.

Let's dive in!

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

• 🦋 Bluesky
• ✖️ X / Twitter
• 👔 LinkedIn
• 👽 Reddit

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⚛️ React​

• 💸 Product for Engineers - LLMs are picking winners. Here’s how to become one
• 🐦 Pete Hunt joins Vercel to lead Next.js and run Frameworks - The React pioneer is back! He is the one who bet early on React for Instagram Web and convinced many of us to try it despite a lukewarm initial public reception.
• 🐦 Tim Neutkens about TypeScript 7 support in Next.js 16.3 - next build uses the TS API, which will only be available in TypeScript 7.1. Until it’s released, you will be able to use experimental.useTypeScriptCli: typechecking will happen through the tsc CLI.
• 🔐 React - Denial of Service in Server Functions - A high vulnerability patched in 19.0.8, 19.1.9, 19.2.8.
• 🔐 Next.js - July 2026 Security Release - Next.js shipping its first pre-announced monthly security release, fixing 4 high and 5 medium vulnerabilities patched in v16.2.11 and v15.5.21.
• 👀 React.dev PR - Dynamic OG images for docs pages - The React website now has dynamic social cards rendered with Satori.
• 📊 ReactBench - Evaluates frontier coding agents on production React work - The Million.js team (React Scan, React Doctor) launches a benchmark grading coding agents on real React tasks, checking behavior, performance, accessibility, and code quality. GPT 5.6 leads and is 6x more cost-efficient than Fable 5.
• 📜 TSRX in TanStack Start: what we like, and three bugs we filed - Pragmatic feedback on TSRX, a TypeScript-based JSX extension, using TanStack Start and React. By the way, Dominic Gannaway (creator of TSRX and former React/Svelte core team member) is working on Octane.js, a promising framework based on TSRX, keeping React's programming model while compiling everything ahead of time.
• 📜 Inside TanStack Table V9 Reactivity - Deep dive into TanStack Table's new reactive and framework-agnostic core, built on a shared atom interface that each adapter implements with its framework's primitives. React isn't signal-based, so its adapter uses TanStack Store instead. This enables granular updates through selectors and unlocks React Compiler compatibility.
• 📜 React Hook Form Avoids State. TanStack Form Scopes It - Comparing 2 different form models: native registered inputs vs controlled inputs with fine-grained updates.
• 📜 Do we need state management libraries anymore? - Nearly all state management libs converge on useSyncExternalStore, and you can implement one in ~50 lines you understand.
• 📜 Props, Composers, and Providers: the composition pattern we're converging on - An opinionated React composition ladder with a naming convention that makes the intent explicit.
• 📜 Advanced React State Boundaries in a Real Next.js App
• 💸 Puter.js - The backend for AI-generated apps. One-shot builds with up to 90% fewer tokens. Auth, Storage, DB, AI & more. No API keys needed
• 📦 shadcn CLI 4.13.1 - Add React Aria support - The shadcn CLI, ui library, and docs now have first-class support for the React Aria headless primitive library, alongside Base UI and Radix UI. Use the shadcn create/init --base aria flag at
• 📦 dx-styles - zero-runtime CSS-in-TS library with typed recipes, token contracts, and RSC support - The maintainer of Linaria and Pigment CSS explains why styled(Component) is a design mistake and introduces a new CSS-in-TS library based on years of experience in this field.
• 📦 Vite Plugin React 0.5.28 - RSC runtime optimizations
• 📦 GTKX 1.0 RC - The React framework for Linux - A general platform for driving GLib and GObject from TypeScript.
• 📦 React Hook Form 7.82 - Add setValue({delayError}), improve getDirtyFields perf
• 📦 Jotai 3.0 alpha - Modernizing the package, ESM, React 18+
• 📦 TanStack Devtools Rspack 0.1 - Devtools supports Rspack, full feature parity to Vite
• 📦 Astryx 0.1.5 - AspectRatio fit, useHotkeys, CollapsibleGroup dividers/density, per-block CodeBlock, and more

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📱 React-Native​

• 💸 Sentry - How Simon Grimm debugs a real React Native app in production. Watch on demand.
• 👀 React Native PR - Swift Package Manager cherry-picked and backported to RN 0.87 - Long-awaited support finally available in v0.87 rc.2.
• 💬 React Native RFC - Binary Props - Phasing folly::dynamic out of Fabric's Android update pipeline - When RN updates props on Android, it serializes every changed prop into a folly::dynamic object. The proposed fix will write prop diffs into a single shared binary. The result is ~257 µs → ~36 µs per view per frame on an entry-level phone. For 200 animated views: 64.3ms → 17.1ms total.
• 🎨 Redraw Playground Examples - Interactive gallery of vector rendering examples: variable strokes, distance-field effects, SVG rendering, and GPU shaders
• 🎨 Keyframer Animation Recipes - A collection of interactive examples where animations run on Reanimated v4 and Gesture Handler
• 📣 Expo Agent - Ending the closed beta and winding the project down
• 📜 How Worklets Bundle Mode accidentally fixed Hermes V1 memory regression - Hermes V1 attaches debugging metadata to eval calls, which Worklets rely on for production animations. Bundle Mode bypasses eval by exposing the precompiled bundle directly to UI runtimes.
• 📜 Which React Native Animation Library Should You Use for Performance? - A look into how Animated, Reanimated, and Ease perform under different animation types. The animation test harness collects data on how each one of them runs under real-world scenarios. Collected data compares UI + JS frame drops, memory, and JS-CPU busyness.
• 📜 What Does a Server-State Client Cost You Per Request? - Measure the CPU overhead of using Relay, Zustand, React Query, and RTK Query within a React Native app.
• 📜 Building a ChatGPT-Style AI Chat App in React Native with RAG & Streaming - Margelo showing how to build a native-feeling chat UI in React Native.
• 📜 How I Added NFC Habit Verification to a React Native App
• 📜 A Step-By-Step Guide to Super App Development With Re.Pack 5
• 💸 Drizz - AI writes 50% of your code now. Why are you still writing test scripts by hand? Vision AI mobile testing for iOS and Android
• 📦 Vision Camera 5.1 - Locked focus adaptiveness on Android, CameraX upgrade
• 📦 Gesture Handler 3.1 - Hover support in Touchable, keyboard tap persistence fix
• 📦 Metro 0.87 - Optional dependencies enabled by default, ~5% faster cold builds
• 📦 Worklets 0.11 - Bytecode worklets in Legacy Eval Mode, Hermes V1 memory workaround
• 📦 Agent Device 0.20 - Redesigned gesture execution, Maestro compatibility through a typed engine, reusable and replayable scripts
• 📦 Skia 2.9 - Font.measureText on Web, OpenGL graceful failure
• 📦 WebGPU 0.6 - YUV conversion for Android camera frames, iOS simulator fixes
• 📦 Sentry 8.19 - Aggregate TurboModule call counts, historical tombstones from Android's ApplicationExitInfo
• 📦 Argent 0.16 - Tool-server event log, end-to-end flows without agent, tar-upload for remote files
• 📦 Whisper.rn - React Native bindings for OpenAI Whisper and NVIDIA Parakeet automatic speech recognition (ASR) through whisper.cpp
• 📦 Expo Apple Targets 5.0 - Easier target variants
• 📦 Nitro Godot - Embed Godot Engine in React Native via Nitro Modules
• 📦 Playback Controls - System media UI control without audio playback
• 📦 Expo Libghostty - Ghostty terminal view for Expo/React Native
• 📦 RN Date - High-performance native date library, powered by C++ and Nitro Modules
• 🤖 Metrognome - An AI Agent for Measured React Native Performance Fixes
• 🤖 Pure Module Skill - Scaffold pure JSI/C++ modules from TurboModule templates
• ️🎙️ RNR 367 - Ask Us Anything - Robin and Mazen tackle listener questions on React Native, AI, mobile development, Expo Router, Flutter, performance, and consulting.

🔀 Other​

• 📜 Engineering Yuku’s High-Performance Parsers with Data-Oriented Design - Yuku outperforms the Oxc parser by using data-oriented design. The textbook AST node optimizes for developer readability but is not machine-efficient. Yuku designs the AST nodes' data structure to optimize their memory layout and access patterns.
• 📜 Fetch Is Not Enough - Why Request/Response fall short for servers, and a proposal for a unified serve() API that would work across Node, Deno, Bun, and Workers.
• 📦 Oxlint 1.75 - Type-Aware Linting Stable - The Oxc team released a stable version of tsgolint 7.0, based on TypeScript v7 and following its versioning scheme. This enables the --type-aware and --type-check flags in Oxlint, as well as 43 additional type-aware rules.
• 📦 pnpm 11.11-11.14 - Workspace release management, pnpm doctor, pnpm access - pnpm can now version and release a monorepo workspace, supporting .changesets
• 📦 Rolldown 1.2 - HMR, watcher, tree-shaking, sourcemaps improvements and many fixes
• 📦 Astro 7.1 - Pagination URLs control, CSP control for inline scripts/styles, run multiple dev servers
• 📦 Lightning CSS 1.33 - Support for alpha(), @position-try, ::search-text, ::highlight
• 📦 magic-string 1.0 - Small, fast utility for manipulating source code strings and generating sourcemaps

🤭 Fun​

See ya! 👋

This week, the React team documented its reorganization into working groups. The docs got a new section on what actually activates a Suspense boundary. A few thoughtful posts weighed React against lighter alternatives like HTMX and SolidJS.

On the React Native side, two RFCs caught our eye: media queries in StyleSheet and ViewTransition support, plus a Nitro Modules rewrite of Rive that's up to 94x faster.

Also worth your time: the newest version of npm blocks install scripts by default!

Let's dive in!

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

• 🦋 Bluesky
• ✖️ X / Twitter
• 👔 LinkedIn
• 👽 Reddit

💸 Sponsor​

Ship AI generated code safely with Meticulous.

Claude writes your code. Claude reviews your code. Claude fixes the review comments. And somehow, you're the one getting paged at 2am when it breaks in prod.

Fortunately, top AI-driven teams like Dropbox, Notion, LaunchDarkly, and Wiz rely on Meticulous to run 1000s of e2e UI tests autonomously, covering every user flow, edge case, role and permutation. Built by ex-Palantir engineers, Meticulous gives you near-exhaustive coverage in weeks, without any developer effort. 

It works like magic in the background:

• Near-exhaustive coverage on every test run
• No test creation
• No maintenance (seriously)
• Zero flakes (built on a deterministic browser)

Check it out - and see why one engineering leader at Dropbox said that “once we started using Meticulous, we couldn’t imagine working without it.”

⚛️ React​

• 💸 SVAR React Gantt — A modern React Gantt chart for project scheduling, from simple timelines to enterprise planning
• 👀 Meet the new React Team - Reorganized by Working Groups - The newly refreshed team page now reflects React Foundation governance: a Leadership Council with one representative per Working Group, and members contributing to Working Groups clearly identified with a badge.
• 📖 React Docs - What activates a Suspense boundary - New React docs section with live examples covering lazy loading, reading promises with use(), stylesheets/fonts/images loading, streaming SSR, deferred CPU work. Includes a side-by-side of reading a Promise with use vs fetching in an Effect. TIL React reveals suspended content at most once every 300ms.
• 🔐 Next.js Security Release and Our Next Patch Release - The Next.js team plans to publish security patches roughly once a month, with advance notice of timeline and severity, so teams can plan accordingly.
• 📣 Better Auth is joining Vercel - The framework-agnostic auth library, which already acquired NextAuth/Auth.js, is now under Vercel. They're pivoting toward an "Agent Auth Protocol" for agentic workflows.
• 📜 Cache Components in Next.js 16 - Flips the App Router to dynamic-by-default, letting you opt into caching with "use cache", cacheLife, and cacheTag primitives that replace legacy caching APIs to power Instant Navigations.
• 📜 React Compiler explained - Shows the Compiler's actual output and how it differs from hand-written memoization, plus how to enable it.
• 📜 useOptimistic Already Handles Rollback in Next.js 16 - It auto-reverts to base state on a failed transition, so the manual rollback in your catch block is often redundant.
• 📜 HTMX and Web Components Instead of React - Mentions the issue with React being the default frontend solution and when it is an overengineering.
• 📜 Async hydration in Preact - Deep dive into how Preact hydration compares to React. Preact v10 can already pause hydration at Suspense boundaries, and v11 will make this more reliable with Hydration 2.0.
• 📜 SolidJS 2.0: A React Developer's First Look - An overview of Solid's signals and their benefits: no dependency arrays, no stale closures, native async in the reactive graph.
• 📜 Exporting Next.js Server Traces with OpenTelemetry - Next.js already emits server-side traces. With little work you can ship them to any OTLP endpoint, any vendor.
• 💸 Formity – Build onboarding, checkout, surveys, lead generation, and more with programmable multi-step forms
• 📦 React Router 8.2 - adds a Web Streams default server entry for non-Node Framework mode apps, nub package manager support - Non-Node apps now default to renderToReadableStream; Node 22+ can opt in behind a flag.
• 📦 Storybook 10.5 - Agentic Review, one-click Claude/Codex plugins, storybook ai MCP command, Angular-Vite preview - Makes Storybook a first-class citizen for coding agents — the MCP passthrough exposes component metadata directly to AI tools.
• 📦 Astryx 0.1.3 - Meta design system, built with StyleX - Better tables, keyboard navigation, and accessibility
• 📦 React Email 6.7 - Enable custom export extensions via --extension
• 🎥 Jack Herrington Can’t Think of a Reason to Choose Next.js Anymore
• 🎥 Ankita Kulkarni - Next.js 16.3 Finally Fixed Slow Navigations
• 🎙️ Podrocket - Async React with Vercel's Aurora Scharff

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📱 React-Native​

• 💸 PostHog - A guide to growth metrics for startups that don't fit in
• 💬 RFC - Media query support in StyleSheet - Borrows StyleX syntax: a style property can hold a default plus @media branches for orientation and color scheme. Styles resolve natively on the UI thread, so switching to dark mode no longer triggers React re-renders.
• 💬 RFC - ViewTransition support in React Native - Discussion to bring React's <ViewTransition> component to Fabric for shared, enter, and exit transitions, an alternative to Reanimated's layout and shared element animations.
• 💬 Proposal - React Native out-of-tree platform API - Doug Lowder, maintainer of react-native-tvos, proposed a new Platform.Variant API (mobile, desktop, tv, headset, web), so that react-native forks don’t have to override the Platform API.
• 🎨 Expo Demos - Gallery of 30 community-built UI demos - Covers WebGPU, shaders, Live Activities, and the new SDK 55 Stack API. Good reference material for advanced UI patterns in mobile apps.
• 📜 Rewriting Rive React Native with Nitro Modules: up to 94× Faster Multi-View Loads - Nitro’s HybridObjects turn a loaded .riv asset into a native object you preload once and share across views, instead of re-parsing per view - 94 times faster multi-view loads and 4.7 times less memory than the old TurboModules SDK.
• 📜 Building balanced mobile layouts: nesting tabs and drawers with Expo Router - Wrapping bottom tabs in a drawer is a common layout that's tricky to get right in file-based routing - the article focuses on theming and gesture handling that won't fight the tabs.
• 📜 Notification Actions in Expo: Let Users Respond Without Opening Your App - Let users respond to notifications without opening the app.
• 📜 Migrating to native stack navigation, with a surprise from iOS 26 - Switching to native stack made the app inherit Liquid Glass styling on iOS 26. The UIDesignRequiresCompatibility Info.plist key opts out, and watch out: native headers clip anything taller than 44pt.
• 📜 Expo - Moving away from @expo/vector-icons - The @expo/vector-icons wrapper package will be deprecated in favor of direct @react-native-vector-icons/* usage.
• 💸 Drizz - One test suite for Android and iOS. No platform-specific selectors, no XPaths. Plain English tests on real devices, powered by AI
• 📦 React Native Screens 4.26 - Stable Tabs API, faster iOS header updates, requires React Native 0.84+ - The native Tabs component is now stable. Experimental work on standalone FormSheet and Stack v5 toolbar menus continues.
• 📦 Keyboard Controller 1.22 - New KeyboardEffects component to customize the iOS keyboard background - You can disable translucency or apply brand colors.
• 📦 Sentry React Native 8.18 - Consume sentry-cocoa as a prebuilt xcframework on iOS. The prebuilt xcframework downloads from GitHub instead of building from source, which should speed up iOS builds.
• 📦 React Native Auth0 5.9 - Passwordless OTP for database connections
• 📦 Unistyles 3.3 - transformOrigin support for shadow tree updates, background image props on Android, react-navigation inactive behavior support
• 📦 React Native Webview 16.0 - Removes legacy architecture support
• 📦 React Native Toast Message 2.4 - Configurable enter/exit animations via animationConfig, onShow callback now receives ToastShowParams
• 📦 React Native Skia 2.8 - Paragraph.getPath() and extendedVisit(), Reanimated is now optional, lower WASM memory use on web
• 📦 React Native Bottom Tabs 1.4 - Icon rendering mode to preserve original icon colors, focused icon shown on hover with iOS Liquid Glass, tab testIDs exposed to Android E2E tools
• 📦 React Native Boost 1.6 - Babel optimizing plugin - Add opt-in Image optimizer

🔀 Other​

• 👀 TC39 - Agenda for the 115th meeting - July 20-23 - Next week, many proposals could advance, including Promise.allKeyed(), JSON.parseImmutable(), Error.code, Map.take(), Declarations in Conditionals, RegExp linear matching.
• 💬 pnpm RFC - Native Monorepo Versioning - Built-in release management coming to pnpm - a native changesets alternative with per-package prerelease lanes that changesets can't structurally express. Merged this week.
• 📜 Rewriting Bun in Rust - Jarred Sumner used ~64 parallel Claude instances with adversarial code review to port ~535k lines of Zig, landing v1.4.0 with fewer memory bugs and ~20% smaller binaries. A striking case study in AI-driven large-scale rewrites. It cost ~$165k in API spend vs. an estimated year of engineer time.
• 📜 Node’s phantom dependency problem and the path to a 5x faster package manager - The Nub team documents the challenges of using a global virtual store and node_module symlinks, already tried by pnpm and Bun. They found a way to make it reliable with a mix of symlinks and hardlinks, leading to warm installs ~5x faster than Bun. However Next.js / Turbopack and React Native / Metro present other challenges.
• 📜 Fetch Needs Error Codes - In-depth analysis on how fetch API drops HTTP/2 and HTTP/3 error codes, plus an ongoing proposal on how to fix it.
• 📜 The Siren Song of ariaNotify() - The new API pushes announcements straight to screen readers, replacing brittle aria-live hacks, but like alert(), its simplicity invites overuse.
• 📜 Do we still need build tools? - A look at common bundler tasks, and how native web standards now cover them. Bundling still wins for complex projects.
• 📜 Proxy and Reflect - The APIs behind proxy-based state libraries like Valtio and MobX.
• 📦 Native SDK - Author native desktop apps in TypeScript or Zig - Vercel Labs' toolkit compiles TS and declarative markup to a single native binary - no browser, no WebView, no JS engine, no GC. Supports macOS, Linux, Windows, and Mobile (experimental).
• 📦 npm 12.0 - Install scripts opt-in by default, 2FA-bypass token deprecation - Install-time code execution (preinstall/install/postinstall) is blocked by default with a soft-fail approach - major supply-chain hardening.

🤭 Fun​

See ya! 👋