RxJS 배우기
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      • 전체 목록
    • Subjects
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    • 사용예시
      • Alphabet Invasion Game
      • Battleship Game
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      • Catch The Dot Game
      • Click Ninja Game
      • Flappy Bird Game
      • Game Loop
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      • Memory Game
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      • Space Invaders Game
      • Stop Watch
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      • Tank Battle Game
      • Tetris Game
      • Type Ahead
      • Uncover Image Game
    • 개념
      • RxJS 입문서
      • RxJS v5 -> v6 업그레이드
      • 시간 기반의 연산자 비교
      • 연산자 imports의 이해
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  • 완료와 에러를 제외한 모든 것들을 무시한다.
  • 예시
  • 추가 자료

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  1. RxJS 배우기
  2. 연산자
  3. Filtering

ignoreElements

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Last updated 5 years ago

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signature: ignoreElements(): Observable

완료와 에러를 제외한 모든 것들을 무시한다.

예시

예시 1: 모든 것들을 무시합니다

( | | )

// RxJS v6+
import { interval } from 'rxjs';
import { take, ignoreElements } from 'rxjs/operators';

//매 100ms 간격으로 값을 내보냅니다
const source = interval(100);
//완료인 경우를 제외하고, 모든 값들을 무시합니다
const example = source.pipe(
  take(5),
  ignoreElements()
);
//결과: "COMPLETE!"
const subscribe = example.subscribe(
  val => console.log(`NEXT: ${val}`),
  val => console.log(`ERROR: ${val}`),
  () => console.log('COMPLETE!')
);

예시 2: 에러만 내보냅니다

// RxJS v6+
import { interval, throwError, of } from 'rxjs';
import { mergeMap, ignoreElements } from 'rxjs/operators';

//매 100ms 간격으로 값을 내보냅니다
const source = interval(100);
//에러를 제외한 모든 것들을 무시합니다
const error = source.pipe(
  mergeMap(val => {
    if (val === 4) {
      return throwError(`ERROR AT ${val}`);
    }
    return of(val);
  }),
  ignoreElements()
);
//결과: "ERROR: ERROR AT 4"
const subscribe = error.subscribe(
  val => console.log(`NEXT: ${val}`),
  val => console.log(`ERROR: ${val}`),
  () => console.log('SECOND COMPLETE!')
);

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:file_folder: Source Code:

StackBlitz
jsBin
jsFiddle
StackBlitz
jsBin
jsFiddle
ignoreElements
https://github.com/ReactiveX/rxjs/blob/master/src/internal/operators/ignoreElements.ts