TanStack Query Has a Free Data Fetching Library — Async State Management for React

A developer wrote useEffect + useState for every API call. Loading state, error state, refetching, caching, stale data, race conditions - each endpoint needed 30 lines of boilerplate. TanStack Query (formerly React Query) handles all async state. Caching, background refetching, pagination, optimistic updates - in one hook. What TanStack Query Offers for Free Automatic Caching - Intelligent cache management Background Refetching - Data stays fresh automatically Stale-While-Revalidate - Show cached data while fetching new Pagination - Built-in infinite scroll and pagination Optimistic Updates - Update UI before server responds Retry - Automatic retry with exponential backoff DevTools - Visual query inspector SSR - Server-side rendering support Framework Agnostic - React, Vue, Svelte, Solid, Angular Quick Start import { useQuery , useMutation , QueryClient , QueryClientProvider } from ' @tanstack/react-query ' function Posts () { const { data , isLoading } = useQuery ({ queryKey : [ ' pos