Learn Node.js

Node.js Topics

Click on a topic to expand and learn in detail.

• 1. Introduction to Node.js

const http = require('http');

http.createServer((req, res) => {
  res.write('Hello, Node.js!');
  res.end();
}).listen(3000);
      

Node.js allows building server-side applications using JavaScript.

• 2. Modules & Packages

// Import a module
const fs = require('fs');

// Read a file
fs.readFile('file.txt', 'utf8', (err, data) => {
  if(err) throw err;
  console.log(data);
});
      

Node.js uses modules to organize code and NPM to manage packages.

• 3. Express.js

const express = require('express');
const app = express();

app.get('/', (req, res) => res.send('Hello, Express!'));

app.listen(3000, () => console.log('Server running on port 3000'));
      

Express is a Node.js framework for building web apps and APIs.

• 4. Advanced Node.js
• Asynchronous Programming (Promises, Async/Await)
• File System & Streams
• REST APIs
• WebSockets