Thanks, Martin. This now works fine 🙂

Note: When removing all traces of ignite in my components, only standing left with the npm-packages and the imports, it is this last line that forces the error. 

/* Ignite UI Modules */

import 'ignite-ui/js/modules/infragistics.util.js';

import 'ignite-ui/js/modules/infragistics.templating.js';

import 'ignite-ui/js/modules/infragistics.datasource.js';

import 'ignite-ui/js/modules/infragistics.ui.combo.js';

import { IgniteUIModule } from 'igniteui-angular2';