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