Node Export Module - GeeksforGeeks (2024)

In Node, the `module.exports` is utilized to expose literals, functions, or objects as modules. This mechanism enables the inclusion of JavaScript files within Node.js applications. The `module` serves as a reference to the current module, and `exports` is an object that is made accessible as the module’s public interface.

Syntax:

module.exports = literal | function | object

Note: Here the assigned value (literal | function | object) is directly exposed as a module and can be used directly.

Syntax:

module.exports.variable = literal | function | object

Note: The assigned value (literal | function | object) is indirectly exposed as a module and can be consumed using the variable.

Below are different ways to export modules:

Example 1: Exporting Literals

Create a file named as app.js and export the literal using module.exports.

module.exports = "GeeksforGeeks"; 

Create a file named as index.js and import the file app.js to print the exported literal to the console.

const company = require("./app"); 
console.log(company); 

Output:

GeeksforGeeks

Example 2: Exporting Object:

Create a file named as app.js and export the object using module.exports.

module.exports = { 
 name: 'GeeksforGeeks', 
 website: 'https://geeksforgeeks.org'
} 

Create a file named as index.js and import the file app.js to print the exported object data to the console.

const company = require('./app'); 
console.log(company.name); 
console.log(company.website); 

Output:

GeeksforGeeks
https://geeksforgeeks.org

Example 3: Exporting Function

Create a file named as app.js and export the function using module.exports.

module.exports = function (a, b) { 
 console.log(a + b); 
} 

Create a file named as index.js and import the file app.js to use the exported function.

const sum = require('./app'); 
sum(2, 5); 

Output:

7

Example 4: Exporting function as a class

Create a file named as app.js. Define a function using this keyword and export the function using module.exports and Create a file named index.js and import the file app.js to use the exported function as a class.

Output:

Company name - GeeksforGeeks
Website - https://geeksforgeeks.org