dispatcher_events.js

// event bus as dispatcher
// actions.js
module.exports = {
  addItem: (item) => {
    Bus.trigger("item.added", {
      item: item
    });
  },
  removeItem: (item) => {
    Bus.trigger("item.removed", {
      item: item
    });
  }
};

// item_store.js
class ItemStore {
  constructor() {
    this.bindActions({
      "item.added": "itemAdded",
      "item.removed": "itemRemoved"
    });
  }
  itemAdded(data) {
    this.items.push(data.item);
  }
  itemRemoved(data) {
    /* ... */
  }
}