Zod Library: TypeScript Data Validation Made Simple

Zod: JavaScript and TypeScript Data Validation

Zod is a library that provides specialized tools for empowering JavaScript and TypeScript developers in strengthening data validation processes. It facilitates tasks such as defining and validating data types, as well as customizing error messages.

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Zod empowers developers to perform the following operations seamlessly:

Defining and Declaring Data Types:

• Zod allows for the precise definition and declaration of data types, providing clarity and structure to the codebase.

Data Validation Using Schemas:

• Utilizing schemas, Zod facilitates data validation, ensuring that data conforms to specified rules and structures.

Creating Validation Rules for Complex Data Structures:

• Developers can establish validation rules for intricate data structures, enabling the validation of complex data with ease.

Customizing and Managing Error Messages:

• Zod offers the flexibility to customize and manage error messages, enhancing the user experience by providing meaningful feedback in case of validation failures.

Getting Started with Zod Library

npm i zod

or

yarn add zod

Now, let’s delve into using Zod in your code. Begin by importing the library into your TypeScript file:

import { z } from 'zod';

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

// Example data
const userData = {
  name: 'Semih',
  age: 22,
  email: 'example@example.com',
};

// Validate the data against the schema
try {
  const validatedData = userSchema.parse(userData);
  console.log('Data is valid:', validatedData);
} catch (error) {
  console.error('Validation error:', error.errors);
}

In this example, userSchema defines a schema for user data with name, age, and email properties. The parse method is used to validate userData against the schema. If the data is valid, it will be returned; otherwise, an error will be thrown with details about the validation failure.