Node.js is a JavaScript runtime environment that allows developers to run JavaScript on a server. It uses an event-driven, non-blocking I/O model that makes it lightweight and efficient. Node.js is commonly used for creating web servers, building APIs, and creating real-time applications such as chat applications.
Example:
Let’s say you wanted to create a simple web server using Node.js. You could use the following code:
const http = require(‘http’);
const hostname = ‘127.0.0.1’;
const port = 3000;
const server = http.createServer((req, res) => {
res.statusCode = 200;
res.setHeader(‘Content-Type’, ‘text/plain’);
res.end(‘Hello Worldn’);
});
server.listen(port, hostname, () => {
console.log(`Server running at http://${hostname}:${port}/`);
});