How to take value from infinite stream during click in rxjs?

Question

Angular

Hello.
There is 1 Observable - a click in the document and an interval. The interval starts working from the moment the page is loaded. Can you please tell me how to more elegantly take the value from the interval during the click?
So far it works like this, but I'm confused by the "extra" intermediary variable currentTime.

export class AppComponent implements OnInit {
  private clickEvent$: Observable = fromEvent(document, 'click');
  private timeSec$: Observable = interval(1000);

  private currentTime: number;
  private clickedTime: number;

  ngOnInit() {
    this.clickEvent$.subscribe(
      _ => {
        this.isClicked = true;
        this.clickedTime = this.currentTime;
      }
    );
    this.timeSec$.subscribe(intervalValue => this.currentTime = intervalValue);
  }
}

Answer 1

withLatestFrom
UPD. https://stackblitz.com/edit/angular-govuo1