Migrating 6000 React tests with agents and ASTs

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Plus how we get 'async everywhere' with React 19.2, and why to reconsider React on the frontend. |

#​453 — November 26, 2025

Read on the Web

📅 This is a rather early note, but React Status will be moving to Fridays in January 2026, as part of a schedule reshuffle for most of our newsletters.
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Your editor, Peter Cooper

Together with  Tiger Data logo
 React Status

How Vercel Built Its First Mobile App with React Native — You may be familiar with v0, Vercel's AI-powered app development tool. They wanted to bring it to iOS and here's how they used React Native and Expo to do so. There's a lot to digest here and they share lots of details about how they tackled certain issues to make the UX smooth and responsive.

Fernando Rojo (Vercel)

Why Use React? (On the Frontend) — Jeremy asks some big, potentially uncomfortable questions, but notes how React's modern server-side powers are a real boon, while questioning React's role on the frontend, where Preact might well suit you better.

Jeremy Keith

Tiger Data Taught AI to Write Real Postgres Code. Try it Today — Tiger Data taught AI how to write idiomatic Postgres and open-sourced it. pg-aiguide brings real DB expertise to Claude Code, or any other MCP-enabled tool.

Tiger Data sponsor

Migrating 6000 React Tests Using AI Agents and ASTs — One week and 50 pull requests led to months of work saved. Even if you dislike the role of AI in building new things, there can be serious wins in mundane maintenance tasks.

Elio Capella Sánchez

React 19.2: The Async Shift is Finally Here — We're more used to seeing Jack in video form on his fantastic YouTube channel, but he's now written about how React's 'async story' has changed and how we get 'async everywhere' in React 19.2.

Jack Herrington

📄 Creating Wavy Infinite Carousels in React Three Fiber with GLSL Shaders – I'm a sucker for a striking visual effect. Colin Demouge

📺 React Router Has a New Hook You Need to Try – Though it is called unstable_useRoute, so take care. Alem Tuzlak

📄 How to Create Apple Maps Style Liquid Glass Sheets in Expo Arunabh Verma (Expo)

📄 93% Faster Next.js in (Your) Kubernetes Matteo Collina

📄 How to Simplify Your React Components with Derived State Olaleye Blessing

🛠  Code, Tools & Libraries

Ant Design 6.0: The React UI Design Language and UI Library — Ant Design and MUI are both similarly safe choices, particularly in higher-end use cases, but Ant arguably has the more 'corporate' aesthetic. v6 promises to be a smooth migration for v5 users without any codemods needed and is focused mostly on deep optimizations and React 19 compatibility.

Ant Design Team

💡 Another popular set of enterprise-focused React components, React Suite, has also released version 6.0.

The Road to Next (50% off with ROAD_TO_BLACK_FRIDAY) — Learn full-stack web development with Next.js 15 and React 19. The perfect match for JavaScript developers ready to go beyond the frontend.

Robin Wieruch sponsor

Cedar v1: A Full-Stack React Framework Based on RedwoodJS — Earlier this year, the RedwoodJS team announced the project would be splitting into two: RedwoodSDK and RedwoodGraphQL. Cedar is a fork of the latter and offers a full-stack framework with React in the frontend, GraphQL for the API, Prisma handling database operations, and built-in support for auth, testing and deployment. Here's why you might want to use it.

CedarJS Team

📢  Elsewhere in the ecosystem

Some other interesting stories in the broader landscape:

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