Validate schemas and declare types with Zod

February 12, 2022

Typescript

Zod is a Typescript package that lets you declare your data types and do runtime type checking.

Lots of possible utilities for this library. Validation and type guards come to mind first, but Zod also includes a lot of helpful methods such as default and transform.

Quick example

typescript

Zod example

import { z } from 'zod'

const Post = z.object({
  id: z.string().uuid(),
  title: z.string().min(1),
  body: z.string()
})

// Declare the type
type Post = z.infer<typeof Post>

const myPost = {
  id: 'c2cffa40-8169-4e9b-bce4-af21bc17b033',
  title: 'Validate schemas and declare types with Zod',
  body: 'Lorem ipsum dolor sit amet, consectetur adipiscing elit.'
}

Post.safeParse(myPost)

// {
//   success: true,
//   data: {
//     id: 'c2cffa40-8169-4e9b-bce4-af21bc17b033',
//     title: 'Validate schemas and declare types with Zod',
//     body: 'Lorem ipsum dolor sit amet, consectetur adipiscing elit.'
//   }
// }