generator-fountain-angular2/generators/service/templates/src/app/service.js

Yeoman Fountain generator to scaffold a webapp with Angular 2 written in ES6 (Babel), TypeScript through Webpack or SystemJS including tools Gulp 4, ESLint, Browsersync and Karma

var ng = require('@angular/core');

module.exports = ng.Class({
  constructor: function () {},

  getData: function () {
    return 1 + 2;
  }
});