The Secret Sauce of State Management
summary
Explains how NgRx turns plain app state into efficient, composable queries and side‑effect handlers using concrete APIs: use createSelector to build memoized getters and derived state (selectors only recompute when arguments change), limit selector args to eight or factorize for very large joins (one attendee solved a 20‑entity join by factoring), derive booleans like authenticated from user objects, and run HTTP uploads or router listeners in effects with dispatch:false to avoid loops and createSelector memoizes only when args change.
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chapters (12)
- 0:00Introduction
- 1:05Overview of NgRx and Angular
- 2:11What are selectors
- 4:00Getter and derived selectors
- 7:53Memoized selectors explained
- 9:23Composing complex selectors
- 11:58Advanced selector customization
- 13:43What are effects
- 15:26Effect decorators and operators
- 17:34Effects as action producers
- 19:41Side effects without actions
- 21:08Recap and closing
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