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update

import 'rxjs/add/operator/pairwise'; import {Router} from '@angular/router; export class AppComponent { constructor(private router: Router) { this.router.events.pairwise().subscribe((e) => { console.log(e); } }); } 

See also How to detect a route change in Angular?

original (super old)

Inject Router and subscribe to events and store them for later reference

constructor(private _router: Router) { this._router.subscribe(route => { this.nextRoute ... this.prevRoute ... });