Node.js - export class from module

In this article, we would like to show you how to export class from module in Node.js.

Below we present how to export class from module1.js to index.js file.

Project structure:

/my-app/
   ├── index.js
   ├── user.js
   └── package.json

Steps to follow:

1. In module1.js file export the class using module.exports.

Practical example:

module.exports = class User {
    constructor(id, name, age) {
        this.id = id;
        this.name = name;
        this.age = age;
    }
 
    display() {
        console.log(`id: ${this.id}, name: ${this.name}, age: ${this.age}`);
    }
 }

2. In index.js file import the class from module1.js using require(). From now you can create class objects and use its methods as presented below.

Practical example:

const User = require('./user');

const user1 = new User(1, 'Tom', 23);

user1.display();

3. Now you can run the project from terminal to see the output using the following command:

node index.js

Output:

id: 1, name: Tom, age: 23