$ npm i -S storm-slides
Either import and initialise using a named import:
import Slides from 'storm-slides';
Slides.init('.js-slides');
Or async using storm-load.js, add the .standalone file to your project, then intiialise using the global name:
Load('/content/js/async/storm-slides.standalone.js').then(() => {
StormSlides.init('.js-slides');
});