角度'Observable <Event>'上不存在Angular 6 router.events.filter'filter'

Question

我已经完成了将我的应用程序更新为Angular 6(它是在5.2版本中).

我有一个错误语法:

import { Router, ActivatedRoute, NavigationEnd } from '@angular/router';
import { filter } from 'rxjs/operators';
...
constructor(private router: Router) {}

this.router.events.filter
      (event => event instanceof NavigationEnd).subscribe((res) => 
    {
      // DO something
    });

错误TS2339:类型'Observable'上不存在属性'filter'.

Angular 6中的语法是什么？

谢谢

Answer 1

这是使用Angular 6+和最新RxJS过滤路由器事件的方法:

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);
        });
    }
}

使用pipe运算符而不是尝试对可观察对象进行链式过滤.

Answer 2

如果您导入过滤器，我在您的代码中看不到

对于 Rxjs 6：

import { filter } from 'rxjs/operators';

    .
    .
    .

     this.router.events.pipe(
       filter((event:Event) => event instanceof NavigationEnd)
     ).subscribe(res => console.log(res))