Node.js is a powerful, open-source runtime environment that allows you to run JavaScript code outside the browser β primarily on the server. It's built on Chromeβs V8 JavaScript engine and is designed to build scalable network applications.
π‘ Quick Fact:
Node.js is not a programming language or a framework β it's a runtime environment for executing JavaScript on the server side.
Node.js uses an event-driven, non-blocking I/O model. This means it can handle multiple requests at once without waiting for one to complete before starting another.
// Example: Basic Node.js HTTP server const http = require('http'); const server = http.createServer((req, res) => { res.end('Hello from Node.js!'); }); server.listen(3000, () => { console.log('Server running on port 3000'); });
http://localhost:3000
. NPM (Node Package Manager) is a tool bundled with Node.js. It lets you install open-source packages (libraries or tools) easily.
npm install express
This command installs the popular Express
framework, which helps build web applications faster using Node.js.
node -v npm -v
π Pro Tip:
Use VS Code as your code editor and install the "Node.js Extension Pack" for better development experience.
Node.js is a game changer for JavaScript developers. It allows you to build fast, scalable, and real-time server-side applications with ease. As you move forward, you'll explore frameworks like Express.js, build APIs, and connect with databases.
β Next Step:
Learn about Node Modules and how to structure a Node.js project.
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