The IIFE generator enables to concatenate a selection of $async modules into an IIFE script that can be used on a website.
<!-- load 2 stylesheet via HTML attribute config --> <script async src="js/async-iife-script.js" data-c='[ [ "css/sheet1.css", "css/sheet2.css" ] ]'></script>
The IIFE generator is available as a Node.js module and CLI program that can be used from the command line.
npm install @style.tools/async-iife
Select the modules that you want to include in the IIFE. Simply save the IIFE script into a file, e.g.
js/async-iife.js and include the file in the HTML of a website.