Using @Injectable and Providers

# Mastering Angular 4: Using @Injectable and Providers for Dependency Injection Angular's dependency injection (DI) system is a cornerstone of building maintainable and testable applications. Understanding `@Injectable` and `providers` is crucial for effectively leveraging DI. This guide provides a comprehensive exploration of these concepts in Angular 4, empowering you to build robust and scalable applications. **What you'll learn:** * What Dependency Injection (DI) is and why it's imp