React Query

What is React Query?

A powerful data synchronization library for React applications (now part of TanStack Query), providing server state management, caching, background updates, and synchronization. Features automatic background refetching, request deduplication, pagination support, infinite queries, and optimistic updates. Eliminates the need for manual loading states, error handling, and caching logic. Powers data fetching for thousands of React applications worldwide. Known for its excellent developer experience, automatic cache management, and seamless integration with React.

When to use it

• Perfect for managing server state, API data fetching, and synchronizing data between server and client in React applications.
• Ideal when you need automatic caching, background updates, pagination, or infinite scrolling.
• Excellent for applications that fetch data from REST APIs, GraphQL endpoints, or any async data source.
• Commonly used in modern React applications, Next.js projects, and when you need to replace useState/useEffect patterns for data fetching.

When NOT to use it

• Client-side only state management - Zustand or Redux are better for local state
• When you don't fetch data from APIs - React Query is specifically for server state
• Simple applications with minimal data fetching - useState/useEffect might be sufficient
• When you need offline-first applications - specialized solutions are better

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