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Developer tools · #rxjs
When users type quickly, Angular apps can fire dozens of HTTP requests. RxJS’s switchMap cancels previous calls so only the latest result updates the UI, preventing race conditions and saving bandwidth. Learn the pattern, see an example, and weigh the trade‑offs.
Replace manual destroy$ Subjects with Angular's takeUntilDestroyed operator for declarative, injection‑context aware subscription cleanup.
Choosing the right RxJS operator for a live search box: cancel stale requests with switchMap, handle errors inside the inner stream, and clean up with takeUntil. Learn the semantics, trade‑offs, and a concrete Angular example.
Learn when to use switchMap versus concatMap in RxJS for fast‑emitting sources, see a concise trade‑off table, and validate the choice with lifecycle logging.
Learn how to implement NgRx Effects to handle asynchronous API calls, prevent race conditions with RxJS flattening operators, and avoid common stream termination errors.
Configure RxJS shareReplay to multicast cold HTTP observables across multiple subscribers with a single source execution, automatic cleanup via refCount, and proper error handling.
switchMap, concatMap, mergeMap and exhaustMap differ only in what happens when a new value arrives mid-flight. A typeahead example, the cancellation caveat, and three ways to verify the behavior in your installed RxJS version.
Learn how to cache HTTP GET responses with RxJS shareReplay, configure bufferSize and refCount, avoid memory leaks, and handle stale data in Angular services.
Decide between NgRx Global Effects and ComponentStore for async logic. Learn when to use global event streams versus localized state to avoid action pollution and improve performance.
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