Introduction
TanStack Query (formerly React Query) is the most popular library for async state management. Version 6 brings significant performance and DX improvements.
React 19 and Server Components
v6 offers native integration with React 19 and Server Components. You can now prefetch queries on the server and continue them on the client without duplication.
Simplified API
useQuery and useMutation get a cleaner API. Options like staleTime and gcTime (formerly cacheTime) have smarter defaults.
New DevTools
The developer tools have been rewritten with a more intuitive interface. Shows the status of each query, last update time, and dependencies.
Improved Optimistic Updates
The API for optimistic updates is simplified with more predictable onMutate and automatic rollback on error.
Conclusion
TanStack Query v6 is faster, simpler, and better integrated with the modern ecosystem. At Vynta, we use it to manage API data efficiently.