How Angular Developers Can Build Smart Objects Using NgRx SignalStore Enrichment

A technical guide published on DEV Community explains how Angular developers can move beyond passive data containers by transforming raw API responses into Smart Objects using a Factory Mixin pattern called Object Enrichment. The approach involves extending plain TypeScript data interfaces with domain methods such as fullName() and hasRole(), making business logic self-contained and immediately discoverable via IDE autocomplete. The article argues that enriching data at write time—when it enters the NgRx SignalStore—is architecturally safer than enriching it at read time via computed() signals, since the latter still exposes raw state to components that bypass the enriched layer. Angular's Dependency Injection constraints within the store are addressed using the runInInjectionContext utility. A working implementation is available on both GitHub and StackBlitz for developers to explore directly.