Using org-mode to generate mindmaps from heading structure has been elusive. There is a Freemind export, but I don't want to have to fire up an external app, and anyway Freemind mind maps look ugly to me.
What about using org-export-html, along with a custom CSS stylesheet, to generate a mindmap in HTML?
I found this Gist: pure css mindmap with nest list element
It creates HTML mindmaps by styling list elements such as:
ul>li:nth-child(even):after
For an org-mode mindmap export, you would want a CSS stylesheet that used H1, H2, H3 for its mindmap nodes, instead of using list elements as the above does. Nine heading levels would be more than sufficient. The mindmap's HTML would display only headings, hiding non-heading text using something like:
p, li {display:none}
What would such CSS look like? How would you modify the above gist, or create a new CSS stylesheet, to permit such a mindmap export?