How not to make several identical requests to the server at the routing level?

Question

Angular

I have a component called through the route that in ngOninit makes a request to the server. If you switch routing many times, then requests are sent to the server again. How to avoid it?

Tried like this - but it doesn't work:

this.route.paramMap
      .pipe(switchMap((parameters) => of(parameters)))
      .subscribe((params: Params) => {
});