1this.router.navigate(['path/to'])
2  .then(() => {
3    window.location.reload();
4  });

1reloadComponent() {
2  let currentUrl = this.router.url;
3      this.router.routeReuseStrategy.shouldReuseRoute = () => false;
4      this.router.onSameUrlNavigation = 'reload';
5      this.router.navigate([currentUrl]);
6  }

1  reloadCurrentRoute() {
2    let currentUrl = this._router.url;
3    this._router.navigateByUrl('/', {skipLocationChange: true}).then(() => {
4        this._router.navigate([currentUrl]);
5        console.log(currentUrl);
6    });
7  }

1reloadCurrentRoute() {
2    let currentUrl = this.router.url;
3    this.router.navigateByUrl('/', {skipLocationChange: true}).then(() => {
4        this.router.navigate([currentUrl]);
5    });
6}
7

1refresh(): void {
2    window.location.reload();
3}

1/*You can use a BehaviorSubject for communicating between different 
2components throughout the app. 
3You can define a data sharing service containing the BehaviorSubject to 
4which you can subscribe and emit changes.
5
6Define a data sharing service
7*/
8
9import { Injectable } from '@angular/core';
10import { BehaviorSubject } from 'rxjs';
11
12@Injectable()
13export class DataSharingService {
14    public isUserLoggedIn: BehaviorSubject<boolean> = new BehaviorSubject<boolean>(false);
15}
16
17/*Add the DataSharingService in your AppModule providers entry.
18
19Next, import the DataSharingService in your <app-header> and in the 
20component where you perform the sign-in operation. In <app-header> 
21subscribe to the changes to isUserLoggedIn subject:
22*/
23
24import { DataSharingService } from './data-sharing.service';
25
26export class AppHeaderComponent { 
27    // Define a variable to use for showing/hiding the Login button
28    isUserLoggedIn: boolean;
29
30    constructor(private dataSharingService: DataSharingService) {
31
32        // Subscribe here, this will automatically update 
33        // "isUserLoggedIn" whenever a change to the subject is made.
34        this.dataSharingService.isUserLoggedIn.subscribe( value => {
35            this.isUserLoggedIn = value;
36        });
37    }
38}
39
40/*In your <app-header> html template, you need to add the *ngIf 
41condition e.g.:
42*/
43
44<button *ngIf="!isUserLoggedIn">Login</button> 
45<button *ngIf="isUserLoggedIn">Sign Out</button>
46
47// Finally, you just need to emit the event once the user has logged in e.g:
48
49someMethodThatPerformsUserLogin() {
50    // Some code 
51    // .....
52    // After the user has logged in, emit the behavior subject changes.
53    this.dataSharingService.isUserLoggedIn.next(true);
54}