What is dependency injection in AngularJS and how is it useful in development?

What is Dependency Injection in AngularJS?

Dependency Injection is a design pattern in AngularJS that allows developers to inject dependencies into components rather than hardcoding them. In AngularJS, the injector is responsible for creating dependencies and injecting them where they are needed.

How is Dependency Injection Useful in Development?

Dependency Injection is useful in development as it promotes modularity, reusability, and testability of code. By injecting dependencies into components, it makes components more loosely coupled and easier to maintain. It also allows for easier unit testing as dependencies can be mocked or replaced with stubs during testing. Overall, Dependency Injection helps in creating more maintainable and scalable AngularJS applications.