L1. INTRODUCTION(Node.js & NPM Basics)

PublishedMarch 16, 2025

•1 min read•View as Markdown

Sahana S Acharya

What is Node.js?

JavaScript runtime to run JS outside the browser.
Ideal for building server-side applications (APIs, etc.).
Uses NPM (Node Package Manager) for managing packages.

Problem & Solution

Problem:

Manually typing and running each line of code is inefficient.

Solution:

Packages: Pre-written code to simplify tasks.
Download from npmjs.com using NPM commands.

NPM Basics

Installing a Package Globally

npm i -g nodemon

-g flag installs nodemon globally.
Avoids restarting server manually.

Running Nodemon

nodemon --version  
nodemon index.js

Runs index.js without needing manual restarts.

Setting Up a Node.js Project

Initializing a Project

npm init

Creates a package.json file (contains project metadata).
Requires inputs like:
- Package name
- Version
- Entry point (default: index.js)

#nodejs

Comments

Join the discussion

No comments yet. Be the first to comment.

More from this blog

L12.📝 Node.js – Handling Forms with Express

import express from 'express'; const app = express(); // When I enter a name, it will be displayed in the URL like this: // http://localhost:1000/?name=sahana&email= // To handle this kind of form data, we need middleware. // For this, we use built...

Jun 9, 20252 min read

L11. 🧩 Node.js – Using EJS Template Engine with Express

// TEMPLATE ENGINE ✨ // If I want to change something in HTML using JS, we need a template engine. // EJS – Embedded JavaScript: allows HTML code to be used inside JS. This is a template engine. // We need to install EJS. // To use EJS, we need to...

Jun 9, 20253 min read

L10. 🌐 Express.js – Serving HTML & JSON

// CREATING SERVER USING EXPRESS 🚀 import express from 'express'; import path from 'path'; const app = express(); // initialize express app // Product array with objects 🍜🥟 const products = [ { title: 'noodles', price: 100 }, { title: '...

Jun 3, 20252 min read

L9. 🛠️ Node.js + Express – CRUD Operations

// CRUD OPERATIONS 🧩 // C = Create | R = Read | U = Update | D = Delete // Creating server using Express ⚙️ import express from 'express'; const app = express(); // express app instance // C = Create => POST method (e.g., posting pic on Instagram...

Jun 2, 20251 min read

L8. ⚡ Node.js + Express.js – Server & Routing

// SERVER & ROUTING IN EXPRESS.JS ⚙️ // In Node.js, we used 'http' module to create a server // In Express.js, it's much easier and faster 🚀 import express from 'express'; // Call express as a function to create the app instance 🧠 const app = exp...