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  • 주어진 함수의 조건만큼 기다린 후, 값을 내보냅니다
  • 예시
  • 추가 자료

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  1. RxJS 배우기
  2. 연산자
  3. Utility

delayWhen

PreviousdelayNextdematerialize

Last updated 5 years ago

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signature: delayWhen(selector: Function, sequence: Observable): Observable

주어진 함수의 조건만큼 기다린 후, 값을 내보냅니다

예시

예시 1: 옵저버블 기반의 delayWhen

( | | )

// RxJS v6+
import { interval, timer } from 'rxjs';
import { delayWhen } from 'rxjs/operators';

//매 초 마다 값을 내보냅니다.
const message = interval(1000);
//5초 뒤 값을 내보냅니다.
const delayForFiveSeconds = () => timer(5000);
//5초 뒤, 지연된 interval 값을 내보내기 시작합니다.
const delayWhenExample = message.pipe(delayWhen(delayForFiveSeconds));
//로그 값은 5초 동안 지연되었습니다.
//ex. 결과: 5s....1...2...3
const subscribe = delayWhenExample.subscribe(val => console.log(val));

추가 자료

- 공식 문

- André Staltz

Source Code:

StackBlitz
jsBin
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📰
delayWhen
📹
💵
Transformation operator: delay and delayWhen
📂
https://github.com/ReactiveX/rxjs/blob/master/src/internal/operators/delayWhen.ts