angular-di

Implement Angular dependency injection with inject() and tokens.

4|Updated Jun 25, 2025
One-click install
npx skills add https://github.com/neogenz/pulpe --skill angular-di-neogenz
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: angular-di
Source: https://github.com/neogenz/pulpe/tree/main/.agents/skills/angular-di
Command: npx skills add https://github.com/neogenz/pulpe --skill angular-di-neogenz

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

Angular's traditional constructor-based DI can get verbose and hard to test; this skill enables developers to implement and manage Angular dependency injection using inject() and tokens to decouple concerns and streamline DI usage.

Core Features & Use Cases

  • Inject multiple services with inject() for concise constructors
  • Define and consume InjectionToken-based contracts for configuration and platform-specific implementations
  • Leverage provider scopes (root, component, route) and hierarchical injection for flexible architectures
  • Dynamic and token-based providers, testing with DI, and maintenance patterns demonstrated in examples

Quick Start

  • Create a simple Angular v20+ app and use inject() in a service to resolve HttpClient
  • Define an InjectionToken<string> for a config value and provide it at module level
  • Use the token in a component to configure behavior and fetch data via HttpClient

Frequently Asked Questions about angular-di

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I use Angular inject() to replace constructor-based dependency injection?

Angular inject() replaces constructor-based dependency injection by allowing services to resolve HttpClient and other dependencies directly within class properties. This decouples concerns and streamlines DI usage for concise, testable constructors.

When do I need InjectionToken for Angular dependency injection?

InjectionToken is needed for Angular dependency injection when defining platform-specific implementations or configuration values. It establishes token-based contracts to decouple configuration from concrete classes at root, component, or route scopes.

How do I configure dynamic providers across root, component, and route scopes in Angular?

Configuring dynamic providers across root, component, and route scopes in Angular involves using useClass, useValue, useFactory, or useExisting. This leverages hierarchical injection for flexible real-world app architectures.

Does Angular inject() work with route-level providers and hierarchical injection?

Angular inject() works with route-level providers and hierarchical injection. It supports dynamic providers across root, component, and route scopes, enabling flexible architectures and token-based configuration for real-world applications.

What is the best way to test Angular dependency injection using inject() and tokens?

The best way to test Angular dependency injection using inject() and tokens is by leveraging InjectionToken-based contracts and dynamic providers. This approach decouples concerns and streamlines maintenance patterns demonstrated in examples.

Do I need Angular v20+ to use inject() for dependency injection?

Yes, Angular v20+ is required to use inject() for dependency injection. You also need understanding of provider types like useClass, useValue, useFactory, and useExisting to define and consume InjectionToken-based contracts.