In Angular, dependency injection (DI) is a powerful mechanism that allows you to inject services and other dependencies into your components and directives. Angular provides several decorators to control how and where dependencies are resolved. Three important decorators are @Self, @SkipSelf, and @Host

We are aware of injecting instances of a class service. But now we are going to see how could we inject a plain javascript object such as app wide configuration object. This is a very common scenario in Angular applications. For that let's create a file config.ts and place some some interface and data correspond to the interface.

When developing Angular applications, it's important to understand the best practices for providing services. Two common methods are using the tree-shakeable provider syntax and the traditional providers array in a component or module.

By understanding ::ng-deep and :host-selector concepts, you can better manage styles in your Angular applications while avoiding potential pitfalls associated with breaking encapsulation.

Angular's default view encapsulation mechanism ensures that the styles defined in a component affect only that component and not other parts of the application. Here's how it works: