vercel/swr

Health v2 · maintenance only

Adoption not part of the score

32473 stars · 1382 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

SWR is a React Hooks library for data fetching, named after the stale-while-revalidate caching strategy. It returns cached data first, then revalidates in the background, providing built-in caching, request deduplication, revalidation on focus/reconnect, polling, pagination, optimistic UI, and React Suspense support.

Use cases

• fetch data in react components with a single hook
• cache and deduplicate api requests in a react app
• revalidate data when the window regains focus
• implement optimistic ui updates with local mutation
• add polling and real-time-ish data refresh to a dashboard
• share one request across many components
• handle pagination and scroll position recovery
• server-side render data fetching with nextjs

When to choose

• you're building a React or React Native app that consumes REST or any async data source
• you want lightweight data fetching with automatic caching and revalidation
• you use Next.js and want SSR/SSG-friendly client data fetching
• you prefer a minimal hook-based API over heavier query libraries

When to avoid

• your app doesn't use React (SWR hooks are React-specific)
• you need complex normalized caching or GraphQL fragments - consider Apollo or similar
• you need server-side state management rather than client data fetching
• you're on Vue, Svelte, or Angular - use TanStack Query or framework-native options instead

Facets

library · maturity stable

http-client caching state-management web-framework web-development frontend apis cross-platform react react-hooks data-fetching stale-while-revalidate suspense react-native nextjs typescript vercel swr nodejs web-server

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