SWR for Data Fetching in React

SWR (stale-while-revalidate) provides elegant data fetching for React. Here's how to use it effectively.

Best Practices#

Keys:
✓ Use consistent key patterns
✓ Include all dependencies in key
✓ Use null to skip fetching
✓ Consider key serialization

Caching:
✓ Set appropriate dedupingInterval
✓ Use keepPreviousData for pagination
✓ Configure revalidation strategies
✓ Use fallback for SSR

Mutations:
✓ Use optimistic updates for UX
✓ Always handle rollback
✓ Revalidate related data
✓ Show loading states

SWR provides elegant, declarative data fetching with built-in caching and revalidation. Use optimistic updates for responsive UIs, infinite loading for lists, and proper error handling for resilience. The stale-while-revalidate strategy ensures users always see data quickly while keeping it fresh.

SWR for Data Fetching in React

Basic Setup#

Basic Data Fetching#

Conditional Fetching#

Mutation and Revalidation#

Optimistic Updates#

Error Handling#

Preloading#

Best Practices#

Conclusion#

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