RxJS switchMap.
- Switch from one stream to another.
- Unsubscribe from previous observable.
- Subscribe to new observable
Info: https://yakovfain.com/2017/09/19/rxjs-essentials-part-6-the-switchmap-operator/
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Bestudeer volgende code: https://stackblitz.com/edit/tmk-observable-switchmap-1.
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