Property 'filter' does not exist on type 'Observable' 报错解决方法

我想做的是监听地址参数变化：

import 'rxjs/operator/filter';//...this.router.events.filter((event:Event) => event instanceof NavigationEnd).subscribe(x => console.log(x))

但报错如下图显示：

解决方法：

对于RXJS 5.x版本：import 'rxjs/add/operator/filter';对于RXJS 6.x 版本：import { filter } from 'rxjs/operators';

import { filter } from 'rxjs/operators';// ..this.router.events.pipe(filter((event:Event) => event instanceof NavigationEnd)).subscribe(x => console.log(x))

import 'rxjs/operator/filter'; // This is valid import statement.// It will import the operator without // modifying Observable prototype// ..// Change how the operator is calledfilter.call(this.router.events, (event:Event) => event instanceof NavigationEnd).subscribe(x => console.log(x));