[pard68]

I have something kind of similar written in Common Lisp, however it uses stock HTML and then lisp. A template is a literal HTML template element, and it's referenced with custom elements. So `<my-el>` is in the file that will be compiled, say indet.html, and then there is a my-el.html file which is the reference that is inserted into the `<my-el>` as a child. This file is just stock HTML with a `<template shadowrootmode="open">` as the root element and then whatever in that. This is all rendered properly by the browser because it is just standard HTML. The slot element can be used to inject into these template els. All the lisp does really is recursively compile the HTML and then manage any logic writtel inside of `<script lang="cl">` tags

It actually supports any language, long as you define the lang= name in a config file to tell the compiler how to process it. Ie for python `python="python -m '$'"` would then let the cl compiler know how to handle `<script lang="python">`.