Do you know what the top requested feature of blogdown has been in the past six years? Code folding. I have rarely seen 34 upvotes on a Github issue in projects that I maintain.

The original request was made in 2017 (thanks, Jasper Slingsby). Two years later, when I was thinking about collapsing code blocks for xaringan slides, I experimented with the <details> tag (thanks, Emi Tanaka, <a href=“/en/2018/07/emi-tanaka/ …