httpResource - Code-JS

Race Conditions in Angular: switchMap vs mergeMap vs concatMap vs exhaustMap [2026]

Lesson 10.6 of the Angular tutorial — fixing race conditions in async code: a decision table for switchMap, mergeMap, concatMap and exhaustMap with typeahead, save-button and upload-queue examples, stale-request cancellation in resource() and httpResource(), AbortController with fetch, and untracked() for effect cycles.

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Angular TransferState and the HTTP Transfer Cache: Deep Dive [2026]

1 Comment / Angular / Code-JS

Lesson 9.6 of the Angular tutorial — how the HttpClient transfer cache avoids double fetches after SSR, its default rules, withHttpTransferCacheOptions and per-request transferCache, origin mapping, resource() with id, manual TransferState with makeStateKey, and keeping the payload small.

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Angular Caching Strategies with httpResource: Stale-While-Revalidate, Invalidation [2026]

Angular httpResource vs resource: Signal-Shaped Async with Auto-Cancellation [2026]

2 Comments / Angular / Code-JS

Lesson 6.3 of the Angular tutorial — httpResource and resource: signal-shaped async with auto-cancellation, loading/error states, manual reload and optimistic updates, vs raw HttpClient + toSignal.

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