React Universe On Air

• You Don’t Need a Rewrite, You Need React Native Brownfield | React Universe On Air Coffee Talk #27

  Is rewriting your native app really the only way to go cross-platform? In this Coffee Talk episode, we explore how React Native Brownfield offers a smarter path forward. Łukasz Chludziński invites Oskar Kwaśniewski and Burak Güner—who work directly on React Native Core and brownfield tooling—to discuss how recent advances in React Native have made brownfield integration far more viable, stable, and scalable. You’ll learn: ➡️ Why brownfield isn’t what it used to be (goodbye, brittle bridging) ➡️ How `RootViewFactory` and `ReactNativeFactory` APIs simplify setup ➡️ What’s new in React Native Brownfield 1.0.0 ➡️ How to keep your architecture clean while integrating React Native ➡️ What this means for modern native stacks like SwiftUI, Jetpack Compose—and future-facing platforms like visionOS Whether you’re maintaining a legacy app or building for what's next, this episode gives you a blueprint for hybrid success. Explore React Native Brownfield 🙌 https://github.com/callstack/react-native-brownfield Check out episode resources on our website 📚 https://bit.ly/3ESW3Lf Catch more React Universe On Air episodes 🎧 https://bit.ly/44A0q8q Get your React Universe Conf 2025 tickets 🎟 https://hubs.li/Q03l-47N0 Sign up for our newsletter ✉️ https://bit.ly/3H2xsE6 Follow us on X 🐦 https://x.com/callstackio Timestamps 00:00 Welcome to the React Universe 02:00 Meet our guests: Oskar & Burak 02:50 Let’s talk brownfield app development 03:37 Craziest brownfield setups our guests have seen 08:19 Greenfield vs. brownfield React Native 14:14 How we used to approach brownfield development 18:20 Callstack’s React Native Brownfield 23:30 RootView Factory & React Native Factory 28:50 New Features in React Native Brownfield 1.0 35:35 Sharing data between native and JavaScript 41:00 How about using different React Native versions 43:30 Cost of complexity 47:00 Learn more and get in touch with our guests

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• TanStack Ecosystem with Tanner Linsley: React Query to TanStack Start | React Universe On Air #50

  Tanner Linsley joins React Universe On Air to unpack the evolution of the TanStack ecosystem—from React Table and React Query to TanStack Router and the newest addition to the family, TanStack Start ✨ What started as internal tooling for Nozzle became a suite of libraries that shaped how developers think about server state, routing, and full-stack React apps. In this episode, Tanner shares the technical decisions behind building framework-agnostic, headless tools—and explains why client-side architecture still matters in a server-first world. You’ll also hear why TanStack Start isn’t just another full-stack framework, how React Server Components could be treated like server state, and what’s coming next for TanStack Router. If you're building React apps at scale or deciding how to modernize your frontend stack, don’t skip this one! Check out episode resources on our website 🧠 https://bit.ly/41Z876l Check out other episodes of our podcast 🎧 https://bit.ly/3XIHBeU Get your React Universe Conf 2025 tickets 🎟 https://hubs.li/Q03g5cLM0 Sign up for Callstack newsletter ✉️ https://bit.ly/4lwS7QP Follow us on X 🐦 https://twitter.com/callstackio Chapters 00:00 Welcome to the React Universe 00:00 Introduction to Open Source and Server State 01:15 Meet our guest: Tanner Linsley 02:19 How Tanner got into programming 04:06 Early programming days when there was no React yet 05:41 Cross-platform beginnings 07:40 Open Source contributions 09:24 Working on Chart.js 14:12 React Table at Nozzle 16:58 How React Static started 20:53 React Query taking shape 27:53 Community reactions to React Query 33:18 Framework agnostic approach 36:26 Cross-platform frameworks comparison 37:56 Headless, type safety, and no dependencies 46:22 TanStack Router 01:00:59 TanStack Start 01:11:06 React Server Components 01:18:51 Wrap-up 01:20:29 React Universe Conf Speakers Announcement

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• How Definitely Typed Changed TypeScript Forever | React Universe On Air #26

  Ever wondered why TypeScript works so well with JavaScript libraries? It’s thanks to Definitely Typed, a project that helps developers use these libraries with type safety and autocompletion 🚀 In this Coffee Talk episode of React Universe On Air, Mike Grabowski https://x.com/grabbou chats with Boris Yankov https://x.com/borisyankov, the creator and maintainer of Definitely Typed, to uncover its story 📚 🟣 TypeScript's Beginnings: Boris revisits 2012, discussing initial challenges and contributions 🟣 Growth to Open Source Giant: From a personal project to a community powerhouse, aided by Microsoft 🟣 TypeScript vs. Flow: Discover why TypeScript thrived with robust type definitions 🟣 Functionality: How Definitely Typed integrates with NPM and TypeScript tooling 🟣 Open-Source Dynamics: Insights into collaboration without strict leadership 🟣 Top TypeScript Features: Boris and Mike's favorites, plus development tips Now, let’s hear from you! Have you ever contributed to Definitely Typed? If so, what library did you add types for and what challenges did you face? Share your experience to inspire new contributors! 🚀 Check out episode resources on our website 🧠 https://bit.ly/4jdRoSD Check out other episodes of our podcast 🎧 https://bit.ly/4hzoScR Get your React Universe Conf 2025 tickets 🎟 https://hubs.li/Q03d4Hll0 Sign up for Callstack newsletter ✉️ ​​https://bit.ly/4iVScLz Follow us on X 🐦 https://twitter.com/callstackio

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• Multiple TV Platforms, One Codebase: React Native TV App Development | React Universe On Air #49

  Eighteen TV platforms, one codebase—what could possibly go wrong? Tune in to find out how to tackle the technical and UX challenges of building for Android TV, Apple TV, Fire TV, Tizen, and more—all with React Native! In the 49th episode of React Universe On Air, Łukasz Chludziński (https://x.com/lukasz_app) teams up with Michael Khirallah (https://x.com/mkralla11), Senior Director of Engineering at DIRECTV, and Chris Trag (https://x.com/chris_trag), Developer Evangelist at Amazon, to discuss why cross-platform development is not just a time-saver but also a way to deliver a consistent user experience. You know that at Callstack, we’re all about performance—and with devices like Samsung’s Tizen TVs released in 2017 (running Chromium 47!), performance is a serious concern. That’s why we asked our guests to share real-world techniques for optimizing TV apps, from architectural choices to strategies that avoid unnecessary performance hits on newer devices. The complexity of TV app development doesn’t stop at coding, though. Our host and guests know it all to well, so they couldn’t help but discuss how they balance unit, integration, automation, and manual testing, leveraging tools like AWS Device Farm and custom-built frameworks to ensure stability across all supported platforms. What’s in it for you? Tips on automating QA without compromising thoroughness and why manual testing remains crucial for end-user experience. Want to get started with React Native TV app development? Download our guide 📖https://hubs.li/Q038xx4l0 Check out episode resources on our website 🧠 https://hubs.li/Q038xx3k0 Check out other episodes of our podcast 🎧 https://hubs.li/Q038kRpf0 Become a speaker at React Universe Conf 2025 🎟 https://sessionize.com/react-universe-conf-2025/ Sign up for Callstack newsletters ✉️ https://hubs.li/Q038kRnp0 Follow us on X 🐦 https://twitter.com/callstackio

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• Reanimated 4 is the Future of Smooth React Native Animations | React Universe On Air #48

  Reanimated 4 is here to change the way we build animations in React Native. With CSS-style animations and transitions, animations are now easier to write, more predictable, and work more like they do on the web. In this episode, Ola Desmurs-Linczewska (https://x.com/p_syche_) sits down with Tomasz Zawadzki (https://x.com/tomekzaw_) and Mateusz Łopaciński (https://x.com/MatiPl01) from Software Mansion to discuss what’s new in Reanimated 4, why React Native is moving toward web standards, and what these changes mean for developers. We talk about: 💜 Why Reanimated 4?—the motivation behind CSS-based animations and what problems they solve. 💜 How CSS animations & transitions work in React Native—use the syntax you already know! 💜 New Architecture-only support—why the old architecture is gone and what it means for migration. 💜 Aligning React Native with web standards—how Meta and the community are making React Native more like the web. 💜 Modularity and the future of Reanimated—splitting the library into smaller packages for better maintainability. 💜 Migration tips and developer experiments—how to upgrade, test new features, and start using CSS animations today. Reanimated 4 is in beta now, so experiment with it and share your impressions in the comments! Check out episode resources on our website 🧠 https://hubs.li/Q036Kc1k0 Share your feedback on this episode ✨ https://bit.ly/fdbck48 Become a speaker at React Universe Conf 2025 🎟 https://sessionize.com/react-universe-conf-2025/ Check out other episodes of our podcast 🎧 https://hubs.li/Q036KbNK0 Sign up for Callstack newsletters ✉️ https://hubs.li/Q036KbNW0 Follow us on X 🐦 https://twitter.com/callstackio

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