Angular 6 router.events.filter ‘filter’ does not exist on type ‘Observable’

This is how to filter router events with Angular 6+ and latest RxJS:

import { Component, OnInit } from '@angular/core';
import { Router, ActivatedRoute, NavigationEnd } from '@angular/router';

import { filter } from 'rxjs/operators';

export class MyComponent implements OnInit {
    constructor(private router: Router, private activatedRoute: ActivatedRoute) {}

    ngOnInit() {
        this.router.events.pipe(
            filter(event => event instanceof NavigationEnd)
        ).subscribe(() => {
            console.log(this.activatedRoute.root);
        });
    }
}

Uses the pipe operator instead of attempting to chain filter on the observable.