To expand on this even more: it would be possible to make it a lightweight web playground like codepen.io By convention, if a note has html block and javascrip

To expand on this even more: it would be possible to make it a lightweight web playground like codepen.io By convention, if a note has html block and javascript block (and optionally css block), I could consider that a small website with index.html, index.js and index.css files and provide a preview of html output.