Rails 7 failing to import yarn package (https://github.com/keisto/vanilla-rangeslider)

This is a non-jQuery version of IonRangeSlider (https://github.com/IonDen/ion.rangeSlider):

https://github.com/keisto/vanilla-rangeslider

I have used this before by trying to stick to pure JS and avoid adding another layer with JQ.

I installed this via yarn and it’s in my node_modules folder.

I added this to my app/javascript/application.js file:

import IonRangeSlider from 'vanilla-rangeslider/js/rangeslider'

after also trying just:

import IonRangeSlider from 'vanilla-rangeslider'

In my compiled JS file in dev all it has is this:

  // ../../node_modules/vanilla-rangeslider/js/rangeslider.js
  var require_rangeslider = __commonJS({
    "../../node_modules/vanilla-rangeslider/js/rangeslider.js"() {
    }
  });

and if I try and initialize a slider all I get is:

Uncaught ReferenceError: ionRangeSlider is not defined

Any ideas here as to what I am missing? I have added some other yarn based JS package with no issues.