You’re calling the method getCurrentNavigation too late. The navigation has finished.
You need call the getCurrentNavigation method inside of the constructor:
constructor(private router: Router) {
this.name = this.router.getCurrentNavigation().extras.state.someData;
}
Or if you want to access the navigation in ngOnInit you can do following:
ngOnInit() {
this.name = history.state.someData;
}