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Developer tools · #rxjs
Learn how to use NestJS Interceptors to standardize API response structures globally, decoupling response formatting from business logic using RxJS.
Learn how switchMap automatically cancels previous HTTP requests in a search‑as‑you‑type flow, ensuring the UI shows only the latest result.
switchMap cancels the previous inner observable, but that does not always abort the network request. Here is the smallest design that keeps stale responses out of state, plus the checks that prove it.
NgRx Effects centralize async side effects, but choosing the wrong flattening operator or boundary can corrupt state. Here is an architecture note on when to use them and how to verify cancellation.
Stop loading thousands of rows into the DOM. Learn how to implement a custom Angular Material DataSource to handle server-side pagination, sorting, and filtering using RxJS.
Duplicate HTTP calls in component‑heavy UIs can be eliminated with RxJS shareReplay. Learn how the default refCount in RxJS 7 affects stream lifetime, the trade‑offs of buffer size, and a concrete Angular service example that caches user data efficiently.
When several components need the same HTTP data, each subscription can fire a new request. RxJS’s shareReplay can multicast a single call and cache the result. This guide explains how to use shareReplay, shows a concrete example, discusses trade‑offs, and gives actionable steps for real‑world use.
Dispatched an NgRx action and nothing happened? A fixed diagnostic order isolates the five real causes: registration scope, action mismatches, dead effect streams, wrong flattening operators, and missing reducer handling.
Learn how RxJS switchMap cancels previous inner observables to keep only the latest request alive, ideal for type‑ahead search.
nestjs
angular
ngrx
angularmaterial