AngularJS uses dependency injection (DI) to inject services, factories, or values into components, enhancing modularity and testability. In production, DI optimization involves minification-safe annotations like ng-annotate
or array-style syntax to prevent errors from variable renaming. This helps avoid runtime failures and keeps the code maintainable.
angular.module('myApp', [])
.controller('MainController', ['$scope', 'DataService', function($scope, DataService) {
// Controller code here
}]);