Javascript - Script in the node engine.
Javascript file are generally in the src, lib, or dist directory
To run the below script with the node engine:
console('Hello World!');
node HelloWorld.js
Hello World!
<script src="https://embed.runkit.com" data-element-id="my-element"></script>
<!-- anywhere else on your page -->
<div id="my-element">// GeoJSON!
var getJSON = require("async-get-json");
await getJSON("https://storage.googleapis.com/maps-devrel/google.json");
</div>