Angular_QNA

Angular 21 - Questions & Explanation 🚀 Angular 21 - Questions, Answers & Diagrams Q1: What are Signals in Angular 21? Answer: Signals are a new reactive way to manage state without RxJS. count = signal(0); count.update(v => v + 1); flowchart LR User --> UpdateSignal --> UIUpdate Q2: What is Zoneless Change Detection? Answer: Angular 21 removes dependency on zone.js for better performance. flowchart TD UserAction --> SignalChange --> UIRefresh Q3: What are Signal Forms? Answer: New way to handle forms using signals instead of reactive forms. name = signal(''); flowchart LR Input --> Signal --> UI Q4: What are Computed Signals? Answer: Derived values that auto-update when base signal changes. total = computed(() => price() + tax()); flowchart LR Price --> Compute --> Total Tax --> Compute Q5: What are Standalone Components? Answer: Components without NgModules. @C...

Angular 21 Features 🚀 Angular 21 Features with Examples 1. Signal State Management Simple reactive state without RxJS. import { signal } from '@angular/core'; count = signal(0); increment() { this.count.update(v => v + 1); } graph LR A[User Click] --> B[Signal Update] B --> C[UI Auto Update] 2. Zoneless Change Detection No zone.js required → faster performance. flowchart TD A[User Action] --> B[Signal Change] B --> C[Component Updates] 3. Signal Forms Modern reactive forms using signals. name = signal(''); updateName(val) { this.name.set(val); } graph TD Input --> Signal --> UI 4. Computed Signals price = signal(100); tax = computed(() => this.price() * 0.1); graph LR Price --> Compute --> Tax 5. Standalone Components @Component({ standalone: true, selector: 'app-test', template: `Hello Angular` }) graph TD App --> Component 6. Faster Testing (V...