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.
Javascript
const Company = require( './app' );
const firstCompany = new Company();
firstCompany.info();
|
Javascript
module.exports = function () {
this .name = 'GeeksforGeeks' ;
this .info = () => {
console.log(`Company name - ${ this .name}`);
console.log(`Website - ${ this .website}`);
}
}
|
Output:
Company name - GeeksforGeeks
Website - https://geeksforgeeks.org
Last Updated :
18 Jan, 2024
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