Web Reference: The main difference between switchMap and other flattening operators is the cancelling effect. On each emission the previous inner observable (the result of the function you supplied) is cancelled and the new observable is subscribed. You can remember this by the phrase switch to a new observable. Mar 8, 2025 · Let's then summarize what we have learned so far: The switchMap operator will create a derived observable (called inner observable) from a source observable and emit those values. When a new inner Observable is emitted, switchMap stops emitting items from the earlier-emitted inner Observable and begins emitting items from the new one. It continues to behave like this for subsequent inner Observables.
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