TanStack Query v5 Pitfalls Common pitfalls and correct patterns for TanStack Query v5. When to Use - Implementing data fetching with useQuery - Setting up mutations with useMutation - Debugging stale data or cache issues - Reviewing code that uses TanStack Query - Migrating from v4 to v5 Workflow Step 1: Check Query Keys Verify query keys use full URL paths for proper deduplication. Step 2: Verify Invalidation Ensure mutations invalidate relevant queries on success. Step 3: Check v5 Patterns Verify v5-specific patterns (isPending vs isLoading). --- Correct Usage Anti-Patterns Optimistic Updat…