Angular 4 Router - Hook each router changes

Question

I would like to create a Breadcrumb.

Breadcrumb Wikipedia

And for this, I thought about creating a Service to handle it. But I need to hook each router changes, a method or a class that will be used everytime the router state change.

This challenge have to be resolved without adding a onActivate method in all my components because I have a lot of them.

Great thanks !

Answer 1

You can use Router events to track route changes

import { Router, NavigationEnd } from '@angular/router';
import 'rxjs/add/operator/filter';

class MyService {

  constructor(private router: Router) {
    this.router.events
      .filter(e => e instanceof NavigationEnd)
      .subscribe(e => console.log('Route changed: ' + e.url);

  }

}