This repo shows how to use package.json to load different versions of Elix, and how to load different versions of Elix on the same page.

The package.json file creates aliases for multiple versions of Elix:

"dependencies": {
  "elix-7": "npm:elix@7.0.0",
  "elix-8": "npm:elix@8.0.0"
}

These aliases are then referenced in paths in index.html, in HTML:

<script type="module" src="node_modules/elix-7/src/DateComboBox.js"></script>

or in JavaScript:

import DateComboBox from './node_modules/elix-8/src/DateComboBox.js';