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What’s the difference between switchMap, mergeMap, and concatMap in Angular’s RxJS usage?

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subina kallyani
medium
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Answer
  • switchMap → Cancels previous observable when a new one starts (common for search APIs).
  • mergeMap → Runs all observables concurrently (best for parallel calls).
  • concatMap → Runs observables sequentially (ensures order).

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    What’s the difference between switchMap, mergeMap, and concatMap in Angular’s RxJS usage? - rxjs & async | EBAT