control-broadcast.component.ts

import { SwUpdate } from '@angular/service-worker';
...

export class ControlBroadcastComponent implements OnInit {

  constructor(private swUpdate: SwUpdate, ...) { }

  ngOnInit() {

    this.swUpdate.available.subscribe(event => {

      console.log('[App] Update available: current version is', event.current, 'available version is', event.available);
      let snackBarRef = this.snackBar.open('Newer version of the app is available', 'Refresh');

      snackBarRef.onAction().subscribe(() => {
        this.winRef.nativeWindow.location.reload()
      });

    });

  }

}