Ng2-dragula and angular2 rc1: ReferenceError: require not defined

Question

I followed the doc 5 minutes of angular2 quick start and changed the code according to the dragula demo for angular 2.

Only Quickstart works as expected, but adding files for dragula2 does not work. I get an exception

zone.js:323 Error: ReferenceError: require is not defined(…)

I tried to follow the prompts from similar questions, but could not fix the problem with them, so I added these questions.

Thanks so much for any help!