flux-like-stores.js

class DummyEventEmitter {
  //it is added to make the publishing feel like an emit
  //event in EventEmitter library.
  emit(eventName, callback) {
     alert(eventName, callback);
  }
}

class CounterStore extends DummyEventEmitter {
	
	constructor(state) {
		super();
		this.state = state;
	}

	handleChange(EVENT_NAME, updatedStore) {
		publish(EVENT_NAME, updatedStore);
	}

	increment() {
    this.state.counter++;
		this.publish('INCREMENT', this.state);
	}

	decrement() {
		this.state.counter--;
		this.publish('DECREMENT', this.state);
	}

	publish(eventName, updatedStore) {
		this.emit(eventName, updatedStore);
	}

};

let counterStore = new CounterStore({
counter: 0
});