import {Injectable} from '@angular/core'; import {environment} from '../../../../environments/environment'; declare const ga: Function; @Injectable() export class GaService { public emitEvent(eventCategory: string, eventAction: string, eventLabel: string = null, eventValue: number = null) { if (environment.production && window['ga']) { ga('send', 'event', { eventCategory: eventCategory, eventLabel: eventLabel, eventAction: eventAction, eventValue: eventValue }); } } }