angular5 路由變化監聽

1.路由監聽

 

//監聽路由變化
this.router.events
  .filter(event => event instanceof NavigationEnd)
  .map(() => this.activatedRoute)
  .map(route => {
    while (route.firstChild) route = route.firstChild;
    return route;
  })
  .subscribe((event) => {
    this.colorChange();
  });