pubsub.md

PubSub class like this:

class PubSub {
  constructor () {
    this.el = document.createElement('div');
  }

  subscribe (eventName, handler) {
    this.el.addEventListener(eventName, handler);
  }

  unsubscribe (eventName, handler) {
    this.el.removeEventListener(eventName, handler);
  }

  publish (eventName, ...args) {
    const event = new Event(eventName);
    event.args = args;
    this.el.dispatchEvent(event);
  }
}