DefinitelyTyped/types/event-to-promise/event-to-promise-tests.ts

import { EventEmitter } from 'events'

import eventToPromise = require('event-to-promise');

{
	const ee = new EventEmitter()
	const ep = eventToPromise(ee, 'custom')

	ep.then(console.log)
	ee.emit('custom')
}

{
	const et = new EventTarget()
	const tp = eventToPromise.multi(et, ['custom'])

	tp.then(console.log)
	et.dispatchEvent(new Event('custom'))
}