Dependency Injection & Create custom service in AngularJS

angular.module('myModule', [])
.factory('serviceId', ['depService', function(depService) {
  // ...
}])
.directive('directiveName', ['depService', function(depService) {
  // ...
}])
.filter('filterName', ['depService', function(depService) {
  // ...
}]); 

@reference_1_angularjs.org  

app.factory('<service>', ['$http', function(http) {
  var shinyNewServiceInstance;
  return shinyNewServiceInstance;
}]); 

@reference_2_stackoverflow  

Create custom service in AngularJS 

@reference_3_youtube