zod library example in typescript

The "zod" library is a TypeScript-first schema validation library designed for use in JavaScript and TypeScript projects. It aims to provide a simple and expressive way to define and validate data schemas. Here are some key points about the "zod" library:

Features of Zod:

1. Type Safety: Zod is built with TypeScript in mind, so it leverages TypeScript's type system to ensure type safety throughout your application.

2. Schema Definition: It allows you to define schemas for data validation using a fluent and declarative API.

3. Data Validation: Zod provides powerful validation capabilities, including type checking, schema validation, and coercion of input data.

4. Asynchronous Validation: Supports asynchronous validation for cases where data validation involves asynchronous operations.

5. Custom Error Messages: You can customize error messages for validation failures, making it easier to provide clear feedback to users or developers.

6. Integration with React: Zod includes hooks and utilities for integrating with React applications, simplifying form validation and state management.

Example Usage:

Here’s a brief example of how you might use Zod to define a schema and validate data:

import { z } from 'zod';

// Define a schema
const userSchema = z.object({
  id: z.string(),
  username: z.string().min(3),
  email: z.string().email(),
  age: z.number().min(18),
});

// Validate data against the schema
const userData = {
  id: '1',
  username: 'john_doe',
  email: '[email protected]',
  age: 25,
};

try {
  userSchema.parse(userData);
  console.log('Validation passed');
} catch (error) {
  console.error('Validation failed:', error.errors);
}