TypeScript Event Dispatcher

reactor.ts

class ReactorEvent {
	private name: string;
	public callbacks: Function[];

	constructor (name: string) {
		this.name = name;
		this.callbacks = [];
	}

	public addCallback(cb: Function) {
		this.callbacks.push(cb);
	}
}

interface IReactorEvents {
	[key: string]: ReactorEvent;
}

export default class Reactor {
	private events: IReactorEvents;

	constructor() {
		this.events = {};
	}

	public addEventListener(eventName: string, cb: Function) {
		let rEvent = this.events[eventName];

		if (!rEvent) {
			rEvent = new ReactorEvent(eventName);
		}

		rEvent.addCallback(cb);
		this.events[eventName] = rEvent;
	}

	public dispatchEvent(eventName: string, eventDetails?: object) {
		for (let cb of this.events[eventName].callbacks) {
			cb(eventDetails);
		}
	}

	public clearEvent(eventName) {
		delete(this.events[eventName]);
	}
}

// Usage Example:
// const r = new Reactor();
// r.addEventListener('testEvent', (optionalEventDetails) => console.log("testEvent Fired", optionalEventDetails))
// r.dispatchEvent('testEvent', {thisObjectIsOptional: true})