Node.js

Node.js is an open-source, cross-platform JavaScript runtime environment that allows developers to run JavaScript code outside of a web browser. It is built on the V8 JavaScript engine, which is the same engine that powers the Google Chrome browser’s JavaScript execution.

Node.js enables developers to use JavaScript to write server-side code, providing a way to create scalable and efficient web applications. It uses an event-driven, non-blocking I/O model, which makes it lightweight and efficient, especially for applications that require real-time communication or data streaming.

Example:

// Example of a simple HTTP server using Node.js
const http = require('http');

const server = http.createServer((req, res) => {
  res.statusCode = 200;
  res.setHeader('Content-Type', 'text/plain');
  res.end('Hello, World!\n');
});

server.listen(3000, '127.0.0.1', () => {
  console.log('Server running at http://127.0.0.1:3000/');
});