(The usual warning: This is code from a couple weeks after Angular 2Alpha 45 – if you’re watching this months later, things may have changed!)
A few weeks ago at the Angular Connect conference in London, the core Angular team presented on the new Observable data flow and related concepts available and under development in Angular 2. Sharp-eyed viewers have tried to copy the code they presented and run it, but found that it does not actually work yet. But not all hope is lost, and it is not necessary to wait. As I write this at the beginning of November 2015, it is possible to run and see the exact kind of demo they presented, in action.
In this video, I present the running code, and explain it (as best I understand, keeping in mind that many of the relevant pieces are not yet documented…) line by line.