what technology have they used to create the website? I'm guessing some pandoc to html workflow plus a static site engine?
The book was originally written in TeX, with lots of macros on top. We hacked together a custom translator (~3k loc, written in golang) that parses the TeX and generates the site.
Then MathJax to render the equations, Bootstrap 4 for some navigation, and jeri.io for the interaction with images.
I had some plans to present some other such written-in-TeX-literate-programs in HTML; could you perhaps share somewhere your "big hack" that you used here (the translator, the javascript)? Totally ok if you don't want to :) Thanks,