[英]RxJS combineLatest with startsWith in Angular gives error
我試圖在對其中一個流進行更改后觸發操作:
import {Observable} from 'rxjs/Observable';
import 'rxjs/add/operator/startWith';
const from$: Observable<number> = this.form.controls['input1'].valueChanges;
const to$: Observable<number> = this.form.controls['input2'].valueChanges;
Observable
.combineLatest(
from$.startsWith(0),
to$.startsWith(0),
(a, b) => {
console.log(a, b);
});
問題是我收到了一個錯誤:
error TS2339: Property 'startsWith' does not exist on type 'Observable<number>'.
這段代碼有什么問題?
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