smartevent/ts/index.ts

import * as plugins from './smartevent.plugins';
import { EventEmitter } from 'events';

export { EventEmitter };

export let once = async <T>(eventEmitter: EventEmitter, eventName: string): Promise<T> => {
  let done = plugins.smartpromise.defer<T>();
  eventEmitter.once(eventName, done.resolve);
  return await done.promise;
};