What is the EventEmitter class? How do you create and use custom events?

EventEmitter allows objects to emit named events and listen for them.

Example:

const EventEmitter = require('events');
const emitter = new EventEmitter();

emitter.on('greet', (name) => {

console.log(`Hello, ${name}!`);

});

emitter.emit('greet', 'Alice');

Output: Hello, Alice!

It’s fundamental for asynchronous communication in Node.js.