stackedCards with node.js & webpack

[heeplr]

Sorry if this is a newbie question.
I'm trying to use stackedCards with

$ yarn add junedchhipa/stacked-cards
yarn add v1.22.10
[1/4] Resolving packages...
[2/4] Fetching packages...
[3/4] Linking dependencies...
[4/4] Building fresh packages...
success Saved lockfile.
success Saved 1 new dependency.
info Direct dependencies
└─ stackedCards@1.0.0
info All dependencies
└─ stackedCards@1.0.0
Done in 7.94s.

and then adding ìmport 'stackedCards'; to my main.js

But webpack complains:

ERROR in ./src/main.js 3:0-22
Module not found: Error: Can't resolve 'stackedCards' in '/home/web/mySite/src'

The repository is inside /home/web/node_modules/stackedCards/...

I suppose I forgot something or did something stupid and it's probably not an issue with this project. Since I couldn't find a solution to this, I hope to find help here.

How's the right way to use stackedCards with webpack and node.js?

EDIT: I also tried to import 'stackedCards/src/stackedCards.js' directly. The webpack error then disappears but then the Browswer complains with Uncaught ReferenceError: stackedCards is not defined