SWR

SWR is a lightweight React hook library designed for modern data fetching. It offers features like built-in caching, automatic revalidation, and request deduplication to ensure your UI remains fast, consistent, and up-to-date. With just one hook, useSWR, you can fetch data by providing a key and a fetcher function. The hook manages the request lifecycle, caches responses, and provides reactive states such as data, error, and isLoading to control your UI rendering.

SWR handles various aspects of data fetching seamlessly, including fast page navigation, polling, data dependency management, revalidation on focus or network recovery, local mutations for optimistic UI updates, and support for pagination and scroll position recovery. It is lightweight, agnostic to data sources (REST, GraphQL, or custom fetchers), and built with React's native features like Suspense in mind. SWR also offers automatic background revalidation and utilities for real-time updates, making it resilient and suitable for complex data scenarios.

Designed for React's ergonomics, SWR is compatible with server-side rendering (SSR) and static site generation (SSG), and is fully typed for TypeScript support. Whether you're building simple or complex data-driven interfaces, SWR provides a robust foundation for efficient data handling in React applications.