typescript - Get previous route URL : Angular

Question

I am trying to get the previous route path in Angular. I have used this code below it is working when I am navigating from one route to another. But if I reload in the current route then the function below returning nothing.

Is there any way to the previous route after reload the current page?

import { Router, RoutesRecognized } from "@angular/router";
import { filter, pairwise } from 'rxjs/operators';

previousUrl:string;

constructor(private router: Router) {

    router.events
        .pipe(
          filter(event => event instanceof RoutesRecognized),
          pairwise()
        )            
        .subscribe((e: any) => {
            this.previousUrl = e[0].urlAfterRedirects;
        });
}

Answer 1

等待大神答复