const EventEmitter = require('events'); const myEmitter = new EventEmitter(); // Register async listener using setImmediate myEmitter.on('async-event', () => { setImmediate(() => { console.log('Async listener executed'); }); }); console.log('Before emit'); myEmitter.emit('async-event'); console.log('After emit'); // Output: // Before emit // After emit // Async listener executed