angular-di

Configure dependency injection in Angular v20+ by using the inject() function to simplify service access and enable immediate initialization within injectable services. This approach standardizes service lifetimes and replaces constructor-based injection for cleaner service architecture.

Scoping Angular providers involves configuring component-level providers for isolated UI features and route-level providers for modular architectures. This ensures service lifetimes are managed correctly, preventing scattered configuration and maintaining isolated state where needed.

Creating injection tokens in Angular allows you to provide typed configuration like an API_URL token across your application. You consume these tokens using inject() alongside provider forms like useValue, useFactory, and useExisting to standardize configuration delivery.

Yes, you can aggregate multiple providers in Angular using the multi-provider pattern. This allows you to combine multiple implementations, such as aggregating validators or HTTP interceptors, into a single injection token for centralized consumption and testing overrides.

provideAppInitializer executes boot-time initialization in Angular by running setup logic before the application starts. This dependency injection mechanism ensures required configuration or async tasks are resolved during application startup using the inject() function.

Override Angular providers for testing scenarios by leveraging the dependency injection system to replace tokens and services with test stubs. This involves configuring testbed providers with useValue or useFactory to isolate components and standardize testing setups.