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Zod Schema With Inferred Type

Define a validation schema once with Zod and derive the TypeScript type from it, so runtime checks and compile-time types never drift apart.

TypescriptForm Validation

Code

snippet
import { z } from "zod";

export const SignupSchema = z.object({
  email: z.string().email(),
  password: z.string().min(12),
  age: z.number().int().min(13).optional(),
});

export type Signup = z.infer<typeof SignupSchema>;

export function parseSignup(input: unknown) {
  const parsed = SignupSchema.safeParse(input);
  if (!parsed.success) {
    return { valid: false as const, issues: parsed.error.issues };
  }
  return { valid: true as const, data: parsed.data };
}

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