Article
import 'rxjs/add/operator/filter';
import 'rxjs/add/operator/map';
import 'rxjs/add/operator/mergeMap';
import { Component, OnInit } from '@angular/core';
import { Router, NavigationEnd, ActivatedRoute } from '@angular/router';
import { Title } from '@angular/platform-browser';
@Component({...})
export class AppComponent implements OnInit {
constructor(
private router: Router,
private activatedRoute: ActivatedRoute,
private titleService: Title
) {}
ngOnInit() {
this.router.events
.filter(event => event instanceof NavigationEnd)
.map(() => this.activatedRoute)
.map(route => {
while (route.firstChild) route = route.firstChild;
return route;
})
.filter(route => route.outlet === 'primary')
.mergeMap(route => route.data)
.subscribe((event) => this.titleService.setTitle(event['title']));
}
}