this.router.events.subscribe((event) => {
  if (event instanceof NavigationStart) {
    this.showProgressBar = true
  } else if (event instanceof NavigationEnd) {
    this.showProgressBar = false
  }
  else if (event instanceof NavigationCancel) {
    this.showProgressBar = false
  }
})

您可以在任何事件路由状态下订阅

这里的答案是正确的路由器弃用。对于最新版本的路由器:

this.router.changes.forEach(() => {
    // Do whatever in here
});

or

this.router.changes.subscribe(() => {
     // Do whatever in here
});

要了解两者之间的区别，请查看这个SO问题。

Edit

对于最新的您必须做:

this.router.events.subscribe(event: Event => {
    // Handle route change
});

简单的答案 角8。*

constructor(private route:ActivatedRoute) {
  console.log(route);
}

在Angular 8中，你应该这样做。router.events。订阅((事件:事件)=> {})

例子:

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

@Component({
    selector: 'app-root',
    template: `<router-outlet></router-outlet>`
})
export class AppComponent {

    constructor(private router: Router) {
        //Router subscriber
        this.router.events.subscribe((event: Event) => {
            if (event instanceof NavigationStart) {
                //do something on start activity
            }

            if (event instanceof NavigationError) {
                // Handle error
                console.error(event.error);
            }

            if (event instanceof NavigationEnd) {
                //do something on end activity
            }
        });
   }
}

路由器3.0.0-beta。2应该是

this.router.events.subscribe(path => {
  console.log('path = ', path);
});

Angular 7，如果你想订阅路由器

import { Router, NavigationEnd } from '@angular/router';

import { filter } from 'rxjs/operators';

constructor(
  private router: Router
) {
  router.events.pipe(
    filter(event => event instanceof NavigationEnd)  
  ).subscribe((event: NavigationEnd) => {
    console.log(event.url);
  });
}