trpc-type-safety

To build fully type-safe tRPC APIs, define tRPC routers and procedures on the server with Zod input validation, then call them from a React client using generated hooks. This shares types across server and client, ensuring your TypeScript API contracts are enforced end-to-end without manual type synchronization.

Setting up tRPC with Next.js App Router involves wiring tRPC into server usage and request handlers using App Router adapters. This integration maintains end-to-end TypeScript type safety by automatically inferring input and output types across your server components and client-side React Query hooks.

Yes, you can use React Query caching, retries, and invalidation with tRPC procedures while maintaining full end-to-end typing. The integration generates typed hooks that automatically infer query and mutation signatures, preserving compile-time TypeScript safety across your client-side data fetching logic.

tRPC type safety supports subscription-based real-time updates and safe file upload flows via signed URLs. You can define typed procedures that handle subscription-based updates and upload flows, ensuring that real-time data and file payloads maintain strict end-to-end TypeScript inference.

Using Zod validation in tRPC procedures guarantees runtime correctness while preserving compile-time TypeScript types. Zod schemas validate incoming request data against defined rules and automatically infer TypeScript types, bridging the gap between server validation and client-side type inference.

The best way to share API contracts between client and server in TypeScript is using tRPC to define queries and mutations whose inputs and outputs are validated and inferred automatically. This enforces API contracts end-to-end by defining them once on the server, eliminating manual interface duplication.