Property 'filter' does not exist on type 'Observable' 報錯解決方法
阿新 • • 發佈:2018-11-03
我想做的是監聽地址引數變化:
import 'rxjs/operator/filter';
//...
this.router.events
.filter((event:Event) => event instanceof NavigationEnd)
.subscribe(x => console.log(x))
但報錯如下圖顯示:
解決方法:
對於RXJS 5.x版本: import 'rxjs/add/operator/filter'; 對於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));