Node.js Cheatsheet for Developers (Quick Reference Guide)

If you're learning Node.js or working on backend applications, remembering all commands and modules can be difficult.

This Node.js Cheatsheet gives you a quick reference for the most commonly used commands, modules, and patterns developers use daily.

Save this guide for quick access while coding.

1. Check Node & NPM Version

Before starting any project, make sure Node.js and NPM are installed.

node -v
npm -v

2. Initialize a Node Project

Create a new Node.js project.

npm init

Quick setup:

npm init -y

This creates a package.json file.

3. Import & Export Modules

Node.js uses the CommonJS module system.

Import Module
const fs = require("fs");
Export Module
module.exports = myFunction;

4. File System Module

The fs module allows you to work with files.

Read a file:

fs.readFile("file.txt", "utf8", (err, data) => {
console.log(data);
});

Write a file:

fs.writeFile("file.txt", "Hello World", () => {
console.log("File created");
});

Append to a file:

fs.appendFile("file.txt", "More text", () => {
console.log("Data added");
});

5. Create a Simple HTTP Server

You can create a basic web server using the http module.

const http = require("http");

const server = http.createServer((req, res) => {
res.end("Hello World");
});

server.listen(3000);

Run the server:

node app.js

Open in browser:

http://localhost:3000

6. Install Packages with NPM

Install a package:

npm install express

Install globally:

npm install -g nodemon

Remove package:

npm uninstall package-name

7. Async / Await Example

Modern Node.js uses async / await for asynchronous code.

async function getData() {
const data = await fetchData();
console.log(data);
}

8. Useful Developer Tools

Tools commonly used with Node.js:

• Express.js – Web framework
• Nodemon – Auto restart server
• Docker – Containerization
• Git – Version control

Learning **Node.js becomes much easier when you keep a cheatsheet like this nearby.

Use this guide as a quick reference while building backend applications.

If you found this helpful, save it for later and share it with other developers.

For Tutorials: https://www.quipoin.com/tutorial/node-js