angular-implementation-specialist

Standalone components in Angular v21 eliminate NgModules and use signals for state management. Create a component with @Component({ standalone: true }) and replace traditional inputs/outputs with input() and output() signals for reactive, type-safe state binding and change detection.

Vitest provides fast unit testing for Angular v21 components and services. Write tests using Vitest's API to verify signal-based state, component rendering, and service behavior, integrating seamlessly with TDD workflows and standalone component architectures.

Angular v21's new control flow syntax (@if, @for, @switch) replaces *ngIf and *ngFor directives in standalone components. Use these built-in directives directly in templates for cleaner, more readable conditional rendering and list iteration without additional imports.

OnPush change detection pairs efficiently with signals in Angular v21 standalone components. Signals automatically trigger change detection only when values change, making OnPush the ideal strategy for performance optimization in signal-driven applications.

The inject() function in Angular v21 provides functional dependency injection for standalone components and services. It replaces constructor injection, works seamlessly with signals, and is the recommended pattern for new applications following modern Angular best practices.

Tailwind CSS integrates directly into standalone Angular v21 components via template classes. Apply Tailwind utility classes in component templates and scoped styles; encapsulation works naturally with standalone components for maintainable, utility-first styling.