Dependency Injection in AngularJs

In this series, we have gone through many articles on AngularJs. This time I will discuss about Dependency Injection in AngularJs .

Dependency injection is a software design pattern that allows the removal of hard-coded dependencies and makes it possible to change them, whether at run-time or compile-time.

Before going to DI first we have to know about Service.

What is Service , factory or Provider in AngularJs?

They all are same, with different way of writing. This (Singleton design pattern) defines dependency between your controller and View through application.
We can Inject a service in Controller, which will watch over changes automatically and change its View as per required.

We have many inbuilt standard service available like $scope, $filter. All inbuilt services in AngularJS starts with this sign $. In same way we can create our own custom service and then inject in Controller. Continue reading “Dependency Injection in AngularJs”