Services with ES6 (AngularJS)
You need to use this.$http inside your getResults method.
(() => { 'use strict'; class ResultsFinder { static $inject = ['$http']; constructor($http) { this.$http = $http; } getResults() { return this.$http.get('/foo/bar/'); }} /** * @ngdoc service * @name itemManager.service:ResultsFinder * * @description * */ angular .module('itemManager') .service('ResultsFinder', ResultsFinder);}());As a side note, I added a static $inject "annotation" to your class. This is a best practice if you are not using something like ngAnnotate. It also makes it easier to change out implementations by only changing the $inject values.
If you are a ES5 developer it may help to think about how this would look in ES5
ResultsFinder.$inject = ['$http'];var ResultsFinder = function($http) { this.$http = $http;}ResultsFinder.prototype.getResults = function() { return this.$http.get('/foo/bar/');}NOTE
Since you are using ES6, should probably use ES6 modules to organize your code.
You define and export your angular-module within an ES6 module:
import {module} from 'angular';export var itemManager = module('itemManager', []);Then import the Angular module
import {itemManager} from '../itemManager';class ResultsFinder { static $inject = ['$http']; constructor($http) { this.$http = $http; } getResults() { return this.$http.get('/foo/bar/'); }}itemManager.service('ResultFinder', ResultFinder);