What is dependency injection and how is it used in AngularJS?

What is Dependency Injection in AngularJS?

Dependency Injection in AngularJS is a design pattern that allows the components of an application to be loosely coupled by externalizing the dependencies of a component. In simple terms, it is a way to provide objects that an object needs (dependencies) instead of letting the object create them itself.

How is Dependency Injection used in AngularJS?

In AngularJS, Dependency Injection is used by the framework to provide components with their dependencies. This helps in creating more modular and testable code by making it easier to manage dependencies and replace them with mock objects for testing. The framework takes care of instantiating and injecting the dependencies into the components as needed.