I’ve tried using this code below: it works perfectly to give me a callout that can collapse.
[!callout heading]+
- Dot point
- Nested dot point
What I can’t do is to fold the nested dot point (like the outliner plugin’s functionality?) with the callout.
I’d like to be able to click on the side of the top level dot point within the callout, and to fold the indented dot points below it.
It can actually be done, but it’s a little tricky:
In the image, I’ve collapsed the first hi bullet item, as can be seen by the ring around the dot. So if you click with your mouse just to the left of the bullet (but not to the left of the callout icon), you’ll be able to collapse it.
In other words, it seems like the collapse indicator wrongfully adapts the color of the callout to such an extent that it is hidden. In my simple tests, this applies to both the default theme and Minimal theme, but not the Prism theme.
I’ve not figured out which parts of the CSS needs to be altered to make it visible again, but I’m sure it can be done somehow… 
Thank you so much, Holroy!
I had no idea this could be done, and your solution totally works for me, too. Thank you.
I now realise my problem is slightly different to what I originally said, and I’ll edit the question:
Is there any way to fold nested bulletpoints within a callout in Editing/Preview mode, rather than in Reading mode?
Thank you again for getting me that much closer to the answer!
I’m kind of thinking that’s a no-go… The thing, as I’ve experienced it at least, is that when stuff is at a “secondary” level, they tend not to work as if they were at the “primary” level.
So the list you want to is not at the outer (or “primary”) level, but rather a part of a block quote (aka the callout), so therefore it’s at a “secondary” level. This can be seen in the DOM where the outer level list, is tagged with various “cm-list…” and “cm-fold-indicator” and so on. The one within the blockquote however, is just a “li” element with not extra class for folding or what not.
Some of the same “primary”/“secondary” behavior can be seen when using Admonition style callouts, where links within the callout won’t be renamed, and so on. Same applies to links within dataview queries, and headers from a dataview query can’t always be collapsed either.
The point being, that many of the plugins (and some of the “extra” functionality) can produce output which looks the same as the “base” / “primary” markup, but due to its “secondary” nature, they don’t behave the same.
Thank you, that explains very clearly. Thank you so much.
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