Is there a way to know that the angular route is gone?

Question

Angular

I want to know that they switched to the route and left it.
Usually in the main component from the loadable module I find out when creating, and when destroying.
Later I began to add a resolver when they switch to the route.
But how do I know that they left the route?

Answer 1

The resolver should not know that the page has been left. Its task is to accept some data, and return others.

Answer 2

try Location

Answer 3

To do this, the router has Observable events - where there is, for example, NavigationEnd -> more details in the docks ( https://angular.io/api/router/RouterEvent ) - where you can subscribe and through RxJs operators not only track, but combine any case and actually react to it.