Angular Techniques: Injecting Singleton Services into Custom Classes

How Angular's Dependency Injection Falls Short for Non-Service Classes

In Angular, dependency injection is primarily designed for services and components, facilitated through decorators like @Injectable() and @Component(). These decorators enable Angular to manage the creation and lifecycle of these objects. However, when you step outside this conventional use—into the realm of custom classes that are neither components nor services—you encounter a limitation. Angular's DI can't directly inject dependencies into arbitrary classes. This is where the Service Locator pattern comes into …

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