📌 What is Node.js?

console.log("Welcome to Node.js!");
console.log("This is JavaScript running on the server side.");

📌 What is the Backbone of Node.js?

• The backbone of Node.js is JavaScript
• JavaScript was first launched in 1995
• Initially created for web browsers as a client-side scripting language
• Example uses in browsers: sliding menus, pop-up prompts, calculations, animations, dynamic forms

📌 Why JavaScript Became So Popular?

• Easy-to-learn programming language
• First language learned by many web students
• Essential for web designers and developers due to frontend frameworks (Angular, React, Vue) and libraries

📌 How Does JavaScript Work?

• JavaScript code is converted into machine language by the JavaScript Engine
• All modern browsers have their own JS engines (Chrome → V8, Firefox → SpiderMonkey, etc.)
• V8 Engine, written in C++, is very fast and powers Chrome

📌 Can We Use JavaScript Outside the Browser?

📌 Birth of Node.js

• Node.js is an open-source, cross-platform, server-side JavaScript runtime environment
• Built on Google Chrome's V8 Engine
• Created by Ryan Dahl in 2009
• Latest stable version is v22
• Enables using JavaScript for both frontend and backend development

📌 Features of Node.js

• Server-Side Programming – build backend apps with JavaScript
• Cross-Platform – runs on Windows, Mac, Linux
• Fast & Powerful – powered by the V8 Engine
• Supports APIs – easily work with HTTP and REST APIs
• JavaScript Everywhere – same language for frontend, backend, and databases

📌 Where is Node.js Used?

• Netflix
• Walmart
• eBay
• Yahoo
• PayPal
• NASA
• Uber
• Trello
• Groupon
• LinkedIn

📌 Why Learn Node.js?

• One language (JavaScript) for entire stack (frontend + backend)
• Large community support
• High demand in the job market
• Suitable for building real-time apps (chat apps), APIs, e-commerce platforms, streaming services (Netflix)