NgRx Selectors: How to stop worrying about your Store structure
summary
Concrete claim: using NgRx selectors makes store shape irrelevant by composing view models at read time instead of writing them into reducers. Demonstrations use createFeatureSelector and createSelector, flattening arrays into an entity pattern for O(1) lookups, and wiring URL params via @ngrx/router-store. Reduction in reducer complexity and action churn is shown with one slice replacing three, selectors recomputing only affected queries, and the approach working on large collections and router‑driven detail pages.
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