Zod: TypeScript Schema Validation Without the Boilerplate

Originally published at recca0120.github.io Do you validate the data your backend API returns? Most people just use as to cast the type and hope the data matches expectations. Zod lets you define a schema once and get both runtime validation and TypeScript types — no more trust-based programming. Why Runtime Validation Matters TypeScript types only exist at compile time. Once the code runs, they're gone. // TypeScript won't catch this const data = await fetch ( ' /api/user ' ). then ( r => r . j