TanStack DB enters beta with v0.1

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Plus `useCallback` busywork, TypeScript 5.9 RC, and upping your React Native animations game. |

#​438 — July 30, 2025

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TanStack DB: The Embedded Client Database for TanStack Query — TanStack DB is an embedded client‑side database that uses differential dataflow to power live, relational queries, sub‑ms incremental updates, and seamless optimistic writes. This post does a good job of selling the idea, and the first beta version (v0.1) is available to experiment with now.

Kyle Mathews and Sam Willis

"TanStack DB is an extremely gratifying realization of the years-long vision I had for React Query from day 1."

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Tanner Linsley on X

Open-Source SDK for Finding Dead Code — Reaper by Emerge Tools (now Sentry) is an open-source SDK for iOS & Android that finds dead code in production using runtime analysis - helping teams clean up unused classes/types across app versions.

Sentry sponsor

The Useless useCallback — A look at why useCallback and useMemo can feel like pointless busywork, how just one non‑memoized prop can undo your entire caching strategy, and why new tools like useEffectEvent and React Compiler could put an end to the headaches.

Dominik Dorfmeister

IN BRIEF:

How Parcel Bundles React Server Components — Parcel added React Server Components support a few months ago but here's a deeper look at how this support actually works, what directives like "use client" actually do, etc.

Devon Govett

Precompiled React Native for iOS: Faster Builds Coming in 0.81 — Currently at RC3, the next React Native release introduces precompiled iOS builds promising up to 10x faster build times – here's how it works.

Christian Falch and Brent Vatne (Expo)

Build a Multi-Tenant React App with Lovable — A faster way to implement multi-tenancy using Clerk's built-in orgs, roles, and user switching.

Clerk sponsor

📄 Remix 3 and the End of React-Centric Architectures Alexander T. Williams (The New Stack)

📄 Instrumenting Next.js with Runtime Secret Injection Rohan Chaturvedi (Phase)

📄 Notes on Rewriting JSX as Astro Carlos Neves

🛠  Code, Tools & Libraries

Reanimated 4: The Future of React Native Animations — What if you took the best parts of CSS animations and transitions and brought them into the world of React Native for animating anything? It's a big enough release it even has a ▶️ fancy 5 minute introduction video showing off its capabilities.

Krzysztof Magiera

Better Upload: Simple File Uploads for React — Upload files directly to any S3-compatible service with minimal setup. The quick start guide shows examples for Next.js, TanStack Start, Remix and Hono, but you can adapt it for any backend.

Nicholas Affonso

Rooks.js 8.4: Almost 100 Hooks for All Sorts of Things — An interesting grab bag of custom hooks covering a variety of areas from online status and resize detection to speech synthesis and keyboard input. Lots of examples (see the menu on the left).

Various Contributors

React Three Viverse: Build Three.js / React Three Fiber Apps for VIVERSE — VIVERSE is an open 'virtual world' platform being built by HTC. Here's a tutorial on building a game with it. (GitHub repo.)

Poimandres

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📌 Deploy with PinMe: Host Your Front-End Without Servers. No sign-up. No cost.

🔍 Discover KeyLines - a scalable JavaScript graph visualization toolkit that turns complex data into actionable insights.

📢  Elsewhere in JavaScript

A roundup of some other interesting stories in the broader JavaScript landscape, in case you've missed them:

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