angular-di

The inject() function in Angular v20 replaces constructor-based dependency injection, allowing you to inject services directly into class properties. It facilitates building modular, testable, and maintainable Angular architectures by simplifying service provision.

Configuring Angular providers with useClass, useValue, useFactory, and useExisting enables diverse dependency provisioning scenarios. You can dynamically provide different service implementations based on the environment or route using these provider strategies.

Use InjectionToken in Angular to create flexible dependencies for non-class items like simple values, objects, or factory functions. It enables token management for custom configurations that cannot be strictly typed using standard class-based service tokens.

Manage Angular service scoping by providing services at the root, component, or route levels to control singleton and scoped instances. Hierarchical injection allows child components to access dependencies provided by parent elements efficiently.

Angular dependency injection supports advanced concepts including multi-providers, optional injection, and element boundaries using self, skipSelf, and host modifiers. These features allow precise control over dependency resolution trees and app initializers.

Abstract class tokens for Angular dependency injection provide a typed interface for providing dependencies while maintaining flexibility. This approach allows you to swap implementations easily and mock dependencies during testing strategies without coupling to concrete classes.