Function selectQueryParam

modules/router-store/src/router_selectors.ts:45–46

(param: string)

    (route) => route && route.queryParams
  );
  const selectQueryParam = (param: string) =>
    createSelector(selectQueryParams, (params) => params && params[param]);
  const selectRouteParams = createSelector(
    selectCurrentRoute,
    (route) => route && route.params