LIlioeters·May 8, 2019
The article is kind of a waste of time. It's from 2014, based on an abandoned idea [0] that never went anywhere.
However, I would like to mention posthtml [1] which is an actual practical tool for "transpiling" HTML.
[0] https://github.com/OscarGodson/HTML6
[1] https://github.com/posthtml/posthtml
In A Look into HTML6 – What Is It and What It Has to Offer?