Probably everyone know how to do this.
I had a long first section in my markdown that I could fold in my editor but found myself scrolling in the html and thought wouldn't it be handy if that was folded to.
I had a google and found the
github page with instructions on how to do it, wrapping in a details tag:
# A collapsible section with markdown
<details>
<summary>Click to expand!</summary>
## Heading
1. A numbered
2. list
* With some
* Sub bullets
</details>
I added it, did a Pandoc conversion and very unexpectedly it worked perfectly!!! Fantastic :-)
Googling "collapsible section Pandoc markdown" did not find any Pandoc help but then looking at the HTML source I leaned about the HTML details tag and it was not markdown at all.
Everyday is a schoolday!"