Expert Angular

Overview - Hierarchical components and DI

It's an open secret that Angular internally maintains the tree structure of components. It also maintains the tree index of dependencies.

In any real-world Angular application, we will work with many components and services. The components will have a tree structure ranging from a root component to child components and inner child components, and so on.

That forms a component tree structure internally. Since our components will also have dependencies and injectables, Angular will internally form a dependency tree matrix to track and resolve all the dependencies required for a service or component.

The following are the key things you need to know about hierarchical DI:

• The Angular framework internally ...