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.
Next.js 16.3 is now in preview and will be stabilized in the coming weeks. This sneak peek focuses on a new opt-in feature called Instant Navigations, improving on top of Cache Components. This addresses the loudest criticism of the App Router: server-driven navigations feel like clicking a website, not an app.
With this new feature, you will have to make a very explicit choice whenever you await some data on the server, nicely presented in an Instant Insights dev panel to surface slow navigations:
Stream with
Cache with βuse cacheβ
Block with export const instant = false;
Thereβs more:
Playwright instant() test helper - Assert what must be instantly visible after a link click.
Partial Prefetching - Instead of prefetching a page per link in the viewport, Next.js will now prefetch a reusable shell per route. You can still prefetch links more aggressively (opt-in).
π Next.js 16.3: AI Improvements - Bundled docs, first-party skills, Agent Browser with React introspection, actionable errors, improved MCP server, and docs as Markdown.
π Turbopack: What's New in Next.js 16.3 - Reducing dev server memory by up to 90%, up to 5.5x faster rebuilds with persistent cache, experimental React Compiler in Rust, import.meta.glob API, faster HMR and dev startup.
β
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π React Docs - use() API Reference - This React API docs page has been entirely rewritten, also explaining important concepts such as how Promises must be cached on the client.
π ESLint Plugin React - ESLint v10 compatibility progress - React users of this ESLint plugin have been stuck on ESLint v9 for a while. Thankfully, v10 support has just been merged into the Import plugin, which should also unlock the React plugin compatibility.
π Vercel and Shopify are rebuilding Hydrogen - Vercel is helping Shopify improve its proprietary Hydrogen e-commerce framework. Initially based on React/Remix, the new version should be more portable, supporting Svelte, Nuxt, Next.js, and various server runtimes.
π Rolldown Pulls Rust React Compiler Integration After Binary Size Increase - Nicely summarize the tradeoffs of integrating Rust extensions in frontend tools, and whether itβs a good idea for a framework-agnostic tool to have a first-class integration with React. Oxc blocked the integration until itβs slimmed down (in progress), while Rspack chose to ship the Compiler now and optimize incrementally.
π React Compiler Is A Retrofit - Argues that, unlike Solid/Svelte, the React Compiler optimizes a runtime model that was not initially designed around a compiler. It can increase bundle size and make the memoization contract of your APIs less explicit. It is safer to use it as a linter rather than a compiler.
π Different hydration and rendering strategies - Explains how much JS runs between "looks ready" and "actually works", across every rendering strategy, including non-React ones.
π React Testing Questions That Trip Up Engineers - Covering the role of act(), testing implementation details, overmocking, and challenges like testing IntersectionObserver or drag-and-drop.
π¦ Astryx - Metaβs open-source design system, built on React and StyleX - Meta released an OSS beta version of their design system, built over 8 years and powering 13000+ internal apps, using StyleX atomic CSS-in-JS library. Itβs not a headless lib, but highly themable with design tokens and the ability to eject the components to customize them entirely.
π¦ shadcn/ui - Chat interface components, @shadcn/react - This Chat UI update also takes the opportunity to introduce a new package for unstyled, headless React components. For now, thereβs only a single primitive, but more could come later?
π¦ Storybook for TanStack React - A dedicated Storybook framework for TanStack-powered React apps. This provides first-class, type-safe support for TanStack Router, Start, and Query.
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It feels like Expo SDK 56 just got released, and weβre already on SDK 57, even skipping the beta phase!?
Since RN 0.86 got released with no breaking changes, the Expo team decided to cut the new release sooner than usual. Itβs a test of a new release cadence that will follow RN releases more closely. React Nativeβs move towards stability should make it easier to offer the latest changes almost immediately. Why not do it as a part of the SDK 56 update, then? There are still many changes, and itβs better to make the upgrade intentional to avoid unexpected errors.
RN 0.86 features are now available in Expo: first-class edge-to-edge support on Android, light/dark mode emulation in React Native DevTools, and rendering, layout, and animation fixes. Expo 57 also comes with a list of various Expo-related improvements.
ποΈ Chain React - πΊπΈ Portland - 30-31 July. Last call to secure your ticket! Join the React Native community for 2 days of amazing talks and networking. Get a 15% discount with code "TWIR".
π¦ Node.js 26.4 - Package Maps, VirtualFileSystem - New exciting experimental features just landed! Providing a Package Map, emitted by your package manager, can make Node.js module resolution more reliable and skip costly file-system scanning. VirtualFileSystem lets you create module graphs in-memory that you can import.
π Read Online Hi everyone, Seb and Jan here π! Back from our summer break, weβll cover news from the last two weeks. React v19.3 is getting closer. The React Compiler in Rust is now available in Vite and Bun. CSS-in-JS is set to make a comeback. On the mobile side, React Native keeps refining its public API surface, an important step toward v1.0. Callstack acquired Margelo. Let's dive in! πΈ Sponsor PlanetScale: The database that gets faster as you sleep Agents ship React features faster than...
π Read Online Hi everyone, Seb and Jan here! 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. ποΈ Weβll be taking another break next...
π Read Online Hi everyone, Kasia and Kuba from Software Mansion here. 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! ποΈFYI: weβre taking a break next week; see...
