State Management in Angular: Options and Tradeoffs
Learn how to choose between local state, Signals-based stores, and NgRx for large applications.
State management becomes important when your app grows beyond a few components. ## Levels of state (professional view) ### 1) Local component state Best for: - toggles, dropdowns, UI selection Tools: - component properties - Signals ### 2) Shared app state (feature-level) Best for: - logged-in user profile - shopping cart - filters shared across pages Tools: - a shared service with Signals - BehaviorSubject pattern ### 3) Global enterprise state Best for: - huge apps with many teams - strict patterns and dev tooling Tools: - NgRx (actions, reducers, effects) ## Quick decision chart ```mermaid flowchart TD A[Need shared state?] -->|No| B[Use local Signals] A -->|Yes| C[Is it a big multi-team app?] C -->|No| D[Signals Store Service] C -->|Yes| E[NgRx or equivalent] ``` ## Key idea Do not over-engineer early. Start simple, scale when pain appears. > Next: Build a simple Signals-based store service step by step.