What are the differences between mergeMap concatMap and switchMap

Question

can someone explain me What are the differences between mergeMap, concatMap, and switchMap?

Answer 1

Aspect	mergeMap	concatMap	switchMap
Behavior	Maps to a new observable and merges multiple inner observables concurrently.	Maps to a new observable and concatenates inner observables sequentially.	Maps to a new observable and switches to the latest inner observable, canceling previous ones.
Concurrency	Processes multiple inner observables in parallel.	Processes inner observables one at a time (waits for the current to complete).	Processes only the latest inner observable, canceling any ongoing ones.
Order of Emission	Emits values as they arrive, regardless of order.	Emits values in the order of subscription.	Emits values only from the latest observable.
Use Case	Useful for tasks that can run concurrently (e.g., multiple API calls).	Useful for tasks that must run sequentially (e.g., queued operations).	Useful for tasks where only the latest result matters (e.g., search input).