Simple installation question

After yarn install datamaps, how do I actually include the library in my .js class?

```js
import { DataMap } from "datamaps";
// require('datamaps'); <-- doesn't work either

        var map = new DataMap({element: document.getElementById('container')});
```

throws

ReferenceError: DataMap is not defined

I assume this is something simple, but I'm stuck.  Thanks.
