angular-development

Standalone components eliminate the need for NgModules by using the `standalone: true` flag in the component decorator and applying `inject()` for dependency injection. This approach simplifies your application architecture and reduces boilerplate while maintaining full Angular functionality like routing, forms, and HTTP integration.

Signals provide fine-grained reactivity for local state, while RxJS handles complex async flows and data streams. Combine them by using signals for component-level state and RxJS observables for service-level data management, interceptors, and reactive forms to create responsive applications with clear data flow patterns.

Lazy loading splits your application into feature modules loaded on-demand by configuring routes with `loadComponent` or `loadChildren`. Route guards protect access using `canActivate`, `canDeactivate`, and `canMatch` functions that return boolean or URL redirect values, securing authenticated routes and preventing unauthorized navigation.

Yes. Reactive forms work seamlessly in standalone components via `FormBuilder` injected with `inject()`. Pair them with `HttpClient` interceptors to handle authentication, error transformation, and request/response logging globally, enabling type-safe form validation and centralized HTTP concerns.

Test standalone components using `TestBed.configureTestingModule()` with `providers` instead of `imports`, then inject services via `inject()`. For services, mock dependencies and test reactive logic using marble testing for RxJS observables and `fakeAsync` for async operations to verify component-service integration.

Yes. Standalone components enable tree-shaking unused code, while signals reduce change detection cycles. Create custom directives and pipes with `standalone: true`, use `OnPush` change detection strategy, and leverage `trackBy` in `*ngFor` loops to optimize rendering and memory usage in large applications.