[transfire]

That's very cool.

But it also makes me even more convinced that HTML/CSS needs to split into two standards, one for this kind of GUI/App rendering, and another strictly for text/typesetting. (It's 2020 and it's still not possible to properly print a document via web standards.)

[Boldewyn]

Agreed, developing print stylesheets is a PITA. But the principle proof, that HTML + CSS is capable of being the authoring format for whole books, is brought by PrinceXML, https://www.princexml.com/, for years now.

It’s just that browsers suck with handling print styles.

The splitting is something, that the CSS authors already did with CSS 3 and its single modules (specification-wise). But authors don’t really see anything of that in their day-to-day work.