zod-validation-patterns

Validate user input data by defining a Zod schema that specifies required fields, types, and formats, then use schema.parse() or schema.safeParse() in your API route handler to check incoming requests. Zod ensures type safety and rejects invalid data before it reaches your backend logic.

Yes. Zod integrates seamlessly with React Hook Form by passing your schema to the resolver option. This combines client-side form state management with Zod's validation logic, catching errors before submission and displaying them to users.

Use refinements and custom error messages in your Zod schema to implement domain-specific validation logic. Chain .refine() or .superRefine() methods to add conditions beyond type checking, then customize error messages to guide users toward valid input.

Build complex schemas by composing Zod types: use z.object() for nested objects, z.array() for lists, discriminated unions for conditional fields, and z.infer to extract TypeScript types automatically. This creates reusable, type-safe schemas for intricate data shapes.

Yes. Zod supports async refinements with .refine(async validator) and .superRefine(async validator), allowing you to validate against external data sources like checking username uniqueness during form submission or API request processing.

Apply Zod validation at API entry points, form submission handlers, server actions, and data transformation pipelines to catch invalid data early. This prevents bugs, security vulnerabilities, and inconsistent data states throughout your TypeScript application.