How to make a periodic request to the server in Angular?

Question

Angular

There is a page with some data that is updated every n time on request from the http service, sometimes updated on request (with time n being reset). Now this is done through setInterval and clearInterval. There are suspicions that there is a more beautiful and understandable way.
Plus, it is required to update the data in time n only after the completion of the current request.
Thank you all for future advice.
ps Angular 7+

Answer 1

More or less like this:

import { interval } from 'rxjs';
import { switchMap } from 'rxjs/operators';

const requests$ = interval(300).pipe(
  switchMap(() => http.get('path'))
)

Answer 2

https://www.apollographql.com/docs/angular/basics/...
https://www.apollographql.com/docs/apollo-server/f...