type-safe-form-validation

Type-safe API validation uses Zod to validate incoming payloads at runtime before processing, ensuring data integrity across server handlers. Compose small, reusable schema parts to build complex nested data structure validations for API routes.

Zod runtime validation integrates with react-hook-form by checking form data against defined schemas before processing, generating user-friendly error messages for the UI. This ensures client-side forms only submit data that matches the inferred TypeScript types.

The best way to share validation schemas is defining them once in a shared module and exporting the inferred TypeScript types. This creates a single source of truth for runtime validation across both client-side forms and server API routes without duplicating logic.

You can compose complex API validation logic by building nested data structures from small, reusable Zod schema parts. This composable schema pattern allows you to validate intricate API payloads while maintaining automatic TypeScript type inference.

Type inference with Zod eliminates manual typing errors by generating TypeScript types directly from your validation schemas. This ensures your form validation logic and inferred types stay synchronized automatically, preventing runtime mismatches.