Overview
How our frontend team builds reactive, ultra-fast web applications using fine-grained Angular signals without RxJS memory leaks.
Article Content
# Angular Signals & Reactive State Architecture
Angular Signals introduce fine-grained reactivity, eliminating unnecessary zone.js dirty checking and complex RxJS subscription lifecycle management.
## 1. Signals State Flow
```mermaid
graph LR
UserAction[User Event / Click] --> SignalSet[Writable Signal update]
SignalSet --> Computed[Computed Derivations]
Computed --> DOM[Fine-Grained DOM Node Patch]
subgraph Reactive Graph
SignalSet
Computed
end
```
## 2. Best Practices
- Use `signal()` for local mutable state and `computed()` for derived values.
- Pass data to child components using `input()` and dispatch events using `output()`.
- Avoid mixing untracked RxJS subscriptions; convert APIs with `firstValueFrom()`.