import { Component } from '@angular/core' ; import { CurrentUserService } from '@app/core/services/currentUser.service' ; import { Configuration } from '@app/shared/configuration/app.configuration' ; import { Observable } from 'rxjs' ; @ Component ( { selector : 'app-navigation' , templateUrl : 'navigation.component.html' } ) export class NavigationComponent { isAuthenticated$ : Observable < boolean > ; constructor ( public configuration , public currentUserService ) { } doNothing ( $event ) { $event . preventDefault ( ) ; } }