import EventEmitter from '../eventemitter3/index.js'; /** * Simple adapter sub-class of Nodejs-like EventEmitter. */ export class Observer extends EventEmitter { /** * We simply want to pass along the event-name itself * in every call to a handler, which is the purpose of our `trigger` method * extending the standard API. */ trigger(event, ...data) { this.emit(event, event, ...data); } }