Angular 2 typescript error when using subscribe function on new router (rc 1)

Question

I am trying to set up authentication for my Angular 2 app with the new router. Someone suggested to try the following:

constructor (private _router: Router)          


        

Answer 1

new router

constructor(router:Router) {
  router.events.subscribe(event:Event => {
    if(event instanceof NavigationStart) {
    }
    // NavigationEnd
    // NavigationCancel
    // NavigationError
    // RoutesRecognized
  })
}

original

The Router class has an EventEmitter changes you can subscribe to:

ngOnInit(){
  this._router.changes.subscribe(
    next => {
      if (!userIsLoggedInOrWhatever) {
        this._router.navigate(['Login']);
      }
    }
  )    
}

For how to get the previous route see How to detect a route change in Angular 2? (pairwise())