html export: how to embed + toc + collapsible headings?

[drorcohengithub]

Hi all,
Thanks for all your fantastic work.

I often write long, dirty notebooks. Toc and collapsible headings makes handling them much easier.

However, when I share them with others as html, I typically want:

1. stand alone - hence embedding is necessary
2. maintain the toc, so readers can jump to whatever section they like
3. keep much of the dirty code invisible (i.e. hide my shame). Maintaining many collapsed heading for this is useful.

the dedicated html_toc, html_ch and html_embed nbconvert templates work well for me. However, I understand that chaining them is not possible #901.

Based on this blog https://mattwang44.github.io/en/articles/jupyter-tips/ I tried:

jupyter nbconvert --CodeFoldingPreprocessor.remove_folded_code=True --to html_embed --template toc2 CCN_poster_analysis_and_figures.ipynb

But the --CodeFoldingPreprocessor.remove_folded_code=True option does not do anything (probably not supported by toc template). It was a long shot but hey.

Any ideas on how to achieve something like this?

Cheers!