Question

What is Dependency Injection and How Does It Work in Angular?

Answer 1

Dependency injection is a process where we inject the dependent objects rather than consumer creating the objects. DI is everywhere in Angular or we can go one step ahead and say Angular cannot work without DI.

For example in the below code, $scope and $http objects are created and injected by the Angular framework. The consumer, i.e., CustomerController does not create these objects himself rather Angular injects these objects.

JavaScript

function CustomerController($scope,$http)
{
// your consumer would be using the scope and http objects
}