איך להפעיל פונקציה ברכיב כשמתבצע ניווט באנגולר

import { Component, OnInit } from '@angular/core';
import { NavigationStart, Router, Event, NavigationEnd } from '@angular/router';

@Component({
  selector: 'app-parent',
  templateUrl: './parent.component.html',
  styleUrls: ['./parent.component.scss']
})
export class ParentComponent implements OnInit {
  constructor(private router: Router) { }
  ngOnInit() {
    this.router.events
      .subscribe(
        (event: Event) => {
          if (event instanceof NavigationStart) {
            console.log("start", event);
          }
          if (event instanceof NavigationEnd) {
            console.log("end", event);
          }
        });
  }
}