production-ready.js

export default TutorialComponent.extend({
  result: null,
  isFindingStores: false, // Add a Loading Spinner
  actions: {
    findStores() {
      if (this.isFindingStores) { return; } // Preventing Concurrency

      let geolocation = this.get('geolocation');
      let store = this.get('store');

      this.set('isFindingStores', true); // Add a Loading Spinner
      geolocation.getCoords()
        .then(coords => store.getNearbyStores(coords))
        .then(result => {
          if (this.isDestroyed) { return; } // Handling "set on destroyed object" errors
          this.set('result', result);
        })
        .finally(() => {                      // Handle promise rejection
          if (this.isDestroyed) { return; }   
          this.set('isFindingStores', false); // Add a Loading Spinner
        });
    }
  },
});