State Management in Modern React

The React state management landscape has never had more options — or more confusion about which to use. Redux, once considered mandatory for any serious React app, now competes with lighter alternatives like Zustand, Jotai, and Valtio. Meanwhile, Context API and React Query handle many use cases that previously required a global store at all.

The Colocate-First Rule

Before reaching for any state management library, ask: does this state need to be shared across unrelated components? If no, keep it local with useState or useReducer. If the sharing need comes from prop drilling more than 2 levels, lift state up or use Context. Only reach for a dedicated global store when state is genuinely shared across many distant components and changes frequently enough that Context re-renders become a performance problem.

Choosing the Right Tool

• React Query / TanStack Query: For server state — API data, caching, revalidation. Eliminates 80% of global store usage in data-fetching apps.
• Zustand: For lightweight client-side global state. Minimal boilerplate, excellent TypeScript support, no provider wrapping needed.
• Redux Toolkit: For large teams needing strict conventions, time-travel debugging, and complex derived state. Still the best choice at enterprise scale.
• Context API: For low-frequency global state — theme, locale, authenticated user. Not for high-frequency updates (every keystroke, every animation frame).

The teams that struggle with state management are not using the wrong library — they're putting everything into the global store out of habit. Treat global state like a database: only persist what genuinely needs to be globally accessible, and keep everything else local.