Function advanceActivatedRoute

packages/router/src/router_state.ts:505–531

(route: ActivatedRoute)

 * And we detect that by checking if the snapshot field is set.
 */
export function advanceActivatedRoute(route: ActivatedRoute): void {
  if (route.snapshot) {
    const currentSnapshot = route.snapshot;
    const nextSnapshot = route._futureSnapshot;
    route.snapshot = nextSnapshot;
    if (!shallowEqual(currentSnapshot.queryParams, nextSnapshot.queryParams)) {
      route.queryParamsSubject.next(nextSnapshot.queryParams);
    }
    if (currentSnapshot.fragment !== nextSnapshot.fragment) {
      route.fragmentSubject.next(nextSnapshot.fragment);
    }
    if (!shallowEqual(currentSnapshot.params, nextSnapshot.params)) {
      route.paramsSubject.next(nextSnapshot.params);
    }
    if (!shallowEqualArrays(currentSnapshot.url, nextSnapshot.url)) {
      route.urlSubject.next(nextSnapshot.url);
    }
    if (!shallowEqual(currentSnapshot.data, nextSnapshot.data)) {
      route.dataSubject.next(nextSnapshot.data);
    }
  } else {
    route.snapshot = route._futureSnapshot;

    // this is for resolved data
    route.dataSubject.next(route._futureSnapshot.data);
  }
}

export function equalParamsAndUrlSegments(
  a: ActivatedRouteSnapshot,