Use this package as part of your Eleventy setup (only with Nunjucks) to download modules from npm (via unpkg) and include them as inline scripts in your templates via a shortcode.

npm i eleventy-njk-unpkg-inliner --save-dev

.eleventy.js

const unpkgInliner = require("eleventy-njk-unpkg-inliner");
 
module.exports = function(eleventyConfig) {
  ...
 
  eleventyConfig.addNunjucksAsyncShortcode('unpkgInliner', unpkgInliner);
 
  ...
}

some-template.njk

...
 
<!-- remember to use type="module" -->
<script type="module">
  /* use the path from any unpkg URL */
  {% unpkgInliner "treeboxjs@0.2.0/dist/index.js" %}
</script> 
 
...