Validation Libraries

Zod provides a declarative way to describe data structures and get compile-time types and validate them at runtime. Instead of writing lengthy manual validation functions, you create schemas that describe what valid data looks like.

Zod provides validators for all JavaScript primitives:

import { z } from "zod";

const stringSchema = z.string();
const numberSchema = z.number();
const booleanSchema = z.boolean();

For validating objects, create schemas with z.object():

import { z } from "zod";

const UserSchema = z.object({
  id: z.number(),
  name: z.string(),
  email: z.string(),
});

You can add constraints to make validation more specific:

const UserSchema = z.object({
  id: z.number().positive(), // must be positive
  name: z.string().min(1), // must be non-empty
  email: z.email(), // must be valid email string
});

Complete the Zod schema for validating issue data from the Jello API. The tests will use your schema to validate different data inputs.

1. Complete the JelloIssueSchema that validates:
   • id (string)
   • title (non-empty string)