A sample ES6 Angular 1.x, class-based controller.

sample-es6-angular-controller.js

class SampleCtrl {
  constructor($scope, Service1, Service2) {
    'ngInject';

    this.$scope     = $scope;
    this.Service1   = Service1;
    this.Service2   = Service2;

    $scope.$on('event:sample1', () => this.doSomethingOne());
    $scope.$on('event:sample2', () => this.doSomethingTwo());
  }

  doSomethingOne() {
    this.Service1.exec(); 
  }
  
  doSomethingTwo() {
    this.Service2.exec(); 
  }
}

export default SampleCtrl;