zod-4

What problem does it solve?

Zod 4 schema validation patterns help developers enforce strict input shapes in TypeScript applications, replacing ad hoc checks with reliable, type-safe validation.

Core Features & Use Cases

• Primitive and top-level validators: z.string, z.number, z.boolean, z.date, z.email, z.uuid, z.url provide strong typing.
• Complex object schemas: z.object with nested properties; arrays, records, and tuples for structured data.
• Unions and discriminated unions: z.union and z.discriminatedUnion to model multiple shapes.
• Transformations and refinements: z.coerce, z.transform, z.refine, z.superRefine for data shaping and validation rules.
• Error handling and parsing: parse and safeParse for robust error reporting; integration with forms like React Hook Form.

Quick Start

Begin by defining a simple user schema and validating an input. Define a schema for a user with an id that is a UUID and an email that is valid; validate input using safeParse and handle errors accordingly.