investigate "click to expand" behavior

[fouticus]

Try this:

https://bookdown.org/yihui/rmarkdown-cookbook/html-scroll.html

or this:

https://community.rstudio.com/t/bookdown-reveal-solution-to-exercise/16496

[matthewross07]

Just a note, you can also have code chunks fold or unfold. (class.source = 'foldable')

[fouticus]

Interesting. The class source is also what controls css styling, so I'm not sure if we can do both. I actually think that for now the "click to expand" isn't absolutely necessary. It could be used for self-tests I suppose.