TypeScript Zod Validation Patterns FAQs

Question 1

When should I use Zod instead of standard TypeScript types?

Accepted Answer

Use TypeScript for internal functions and data you control. Use Zod at 'trust boundaries' where data enters your system from external sources like API calls, user inputs, or environment variables that cannot be verified at compile-time.

Question 2

How do I ensure my TypeScript types and Zod schemas stay in sync?

Accepted Answer

You should always use z.infer<typeof yourSchema> to derive your TypeScript interfaces. This ensures that the schema remains the single source of truth and your types update automatically whenever the validation logic changes.

Question 3

Why should I use safeParse instead of parse?

Accepted Answer

safeParse returns a result object containing either the valid data or a detailed error issue list, whereas parse throws an exception. Using safeParse prevents unexpected crashes and allows for more graceful, structured error handling in user-facing applications.

Question 4

What is the benefit of discriminated unions in Zod?

Accepted Answer

Discriminated unions provide much better performance and clearer error messages compared to regular unions. They allow TypeScript to narrow types effectively in switch statements and help Zod report exactly which variant failed validation.

TypeScript Zod Validation Patterns

주요 기능

사용 사례

TypeScript Zod Validation Patterns

주요 기능

사용 사례