TanStack Query v5

Version: @tanstack/react-query@5.90.x Requires: React 18.0+, TypeScript 4.7+

v5 New Features

useMutationState — cross-component mutation tracking without prop drilling
Simplified optimistic updates — via variables from pending mutations, no cache manipulation needed
throwOnError — renamed from useErrorBoundary
networkMode — offline/PWA support (online | always | offlineFirst)
useQueries with combine — merge parallel query results into single object
infiniteQueryOptions — type-safe factory for infinite queries (parallel to queryOptions)
maxPages — limit pages in cache for infinite queries (requires bi-directional pagination)
Mutation callback signature change (v5.89+) — onError/onSuccess/onSettled now receive 4 params (added onMutateResult)