I have a Markdown string in JavaScript, and I\'d like to display it (with bolding, etc) in a less (or, I suppose, more)-style viewer for the comman
If you are into colors then maybe this is worth checking as well:
terminal_markdown_viewer

It can be used straightforward also from within other programs, or python modules.
And it has a lot of styles, like over 200 for markdown and code which can be combined.

It is pretty alpha there may be still bugs
I'm the author of it, maybe some people like it ;-)