Use installed modules in your code
Once you’ve installed the desired modules, you can use them in your Node.js code. For example, if you’ve installed Express, you can create an Express server like this:
const express = require('express');
const app = express();
app.get('/', (req, res) => {
res.send('Hello, world!');
});
app.listen(3000, () => {
console.log('Server is running on port 3000');
});
How To Use Node Modules with npm and package.json
NodeJS is a powerful runtime for server-side JavaScript & these modules are reusable pieces of code that can be easily imported and used in NodeJS applications. npm (Node Package Manager) is the default package manager for Node JS and is used to install, manage, and publish NodeJS packages. This article will guide you through the process of using NodeJS modules with npm and package.json, covering various approaches, and steps to create an application, updating dependencies in package.json, and providing examples with outputs.
Table of Content
- Key Features
- 1. Initialize a Node.js project
- 2. Install Node.js modules
- 3. Save dependencies to package.json
- 4. Use installed modules in your code
- 5. Include package.json in your project
- 6. Install dependencies from package.json