ReadMeFeed / Community knowledge
Real questions. Useful conversations. Find the people who know your stack.
Developer tools · #ngrx
Stop race conditions in Angular. Learn when to use switchMap, exhaustMap, concatMap, and mergeMap in NgRx Effects to handle API calls and user inputs correctly.
A technical decision guide for managing collection state in NgRx. Compare EntityAdapter's normalized approach against custom reducers to reduce boilerplate and improve performance.
Learn how to identify and resolve state mutation bugs in NgRx that cause UI components to stop updating. This guide covers diagnostic patterns, forbidden array methods, and immutable update strategies.
Avoid race conditions in NgRx Effects by choosing the right RxJS flattening operator. Learn when to use switchMap, exhaustMap, concatMap, and mergeMap for API calls.
Goal: Verify if NgRx Effects that use mergeMap preserve the initiation order of concurrent HTTP requests when dispatching success/failure actions, and measure any resulting latency in state updates. Constraints: The ordering depends on the RxJS operator (mergeMap, concatMap, exhaustMap), NgRx Store version, and selector memoization; there is no built‑in guar
Feature: Action History Retention NgRx Store DevTools records every dispatched action to enable time‑travel debugging and state inspection. The documentation does not specify an upper bound on the number of actions kept in memory, and the default appears to be unlimited. This can lead to significant memory growth in applications that dispatch thousands of ac
How to configure NgRx Effects with proper error handling, operator selection, and module registration to avoid silent failures in Angular apps.
Goal: ensure that the pagination selector created with createPaginationSelector validates that the supplied page size is a positive integer before slicing the entity map. Currently the selector accepts any number; zero or negative produce an empty slice, and excessively large page sizes cause unnecessary work. This silent behavior can hide bugs in UI compone
Goal: Determine how the interaction between NgRx Effects and Angular's HttpClient influences request‑latency when several Store actions are dispatched concurrently. Constraints: NgRx Effects process actions synchronously; the choice of mergeMap versus concatMap changes request ordering and concurrency, while the Store runs reducers on the microtask queue and
angular
rxjs