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 called
filter.call(
this.router.events,
(event:Event) => event instanceof NavigationEnd
).subscribe(x => console.log(x));