Can I use this for complex configuration management?

Yes, it provides detailed patterns for using useValue and InjectionTokens to inject configuration objects and environment-specific constants throughout your app.

Does it support testing scenarios?

Absolutely. It includes comprehensive patterns for overriding providers in TestBed and using jasmine/jest spies to create efficient unit tests.

What are hierarchical injectors in this context?

The skill explains how Angular's nested injector system works, allowing you to control the scope and lifetime of service instances at different levels of the component tree.

How does this skill help with Angular performance?

It promotes the use of tree-shakable providers via the 'providedIn: root' syntax, ensuring that services are only included in the final bundle if they are actually used.

Angular Dependency Injection Expert

Name: Angular Dependency Injection Expert
Author: TheBushidoCollective

byTheBushidoCollective

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Learning & Documentation

Architect modular, testable Angular applications using professional dependency injection patterns and hierarchical provider configurations.

About

This skill equips Claude with the deep technical knowledge required to master Angular's Dependency Injection (DI) system. It covers everything from basic service injection to complex hierarchical injector trees, including advanced provider types like useFactory and useValue, type-safe InjectionTokens, and multi-providers. By utilizing this skill, developers can ensure their Angular projects follow best practices for decoupling components, managing application state, and optimizing for tree-shaking while maintaining a highly testable architecture.

Key Features

Setup of type-safe InjectionTokens and multi-provider arrays for extensible architectures.
Best practices for tree-shakable providers and testing with TestBed overrides.
39 GitHub stars
Implementation of all provider types including Class, Value, Factory, and Alias providers.
Advanced usage of DI decorators such as @Optional, @Self, @SkipSelf, and @Host.
Configuration of hierarchical injectors at root, module, component, and element levels.

Use Cases

Refactoring legacy Angular modules to modern, tree-shakable service architectures.
Building complex plugin or interceptor systems using multi-providers and factory patterns.
Designing robust unit tests by properly mocking and overriding dependencies in the DI container.

About

Key Features

Setup of type-safe InjectionTokens and multi-provider arrays for extensible architectures.
Best practices for tree-shakable providers and testing with TestBed overrides.
39 GitHub stars
Implementation of all provider types including Class, Value, Factory, and Alias providers.
Advanced usage of DI decorators such as @Optional, @Self, @SkipSelf, and @Host.
Configuration of hierarchical injectors at root, module, component, and element levels.

Use Cases

Refactoring legacy Angular modules to modern, tree-shakable service architectures.
Building complex plugin or interceptor systems using multi-providers and factory patterns.
Designing robust unit tests by properly mocking and overriding dependencies in the DI container.