Facebook recently started the Messenger Platform that allows bots to answer messages users write to a facebook page or business.

The really cool thing about it is that you can build small applications inside messenger without asking the user to install yet another app or any information. According to facebook already 900M users have installed messenger. You can easily build a bot that saves content for users (http://m.me/hugitapp), replaces an online shop or just shows you locations nearby if you send him your location.

In this tutorial we’re going to build a pretty “stupid” bot in node.js/TypeScript that just shows…

In this article I will briefly describe how to create an AngularJS 1.5 Component in TypeScript and how to inject services into this component.

Components are a good preparation if you plan to migrate to Angular 2.

service: SampleService.ts

class IntegrationsService {  static $inject = ['$q'];
  constructor(protected $q: ng.IQService) {}}angular.module('integrations').service('IntegrationsService', IntegrationsService);

Here we create the angular service and inject $q as dependency. The most important thing to note: the call to angular.module.service must be at the end of the file, because the typescript compiler transpiles the class to a variable without forward declaration. …

I am running karma test runner to execute tests for angular.js. It worked fine most of the time until following error started to appear randomly:

Script error. (:0)

often in combination with:

TypeError: ‘null’ is not an object (evaluating ‘currentSpec.$injector’)
 at app/bower_components/angular-mocks/angular-mocks.js:1966

After doing some research on the web I only found 2 resources which suggested to simply use PhantomJS. In my case this didn’t help.

So I did some tedious work and disabled every test one by one without any success.

Then I started disabling different blocks of my application and it turned out that the problem was caused…