js syntax highlighting for markdown (not for codeblocks in markdown)

[John MacFarlane]

You might find this interesting:
http://talk.commonmark.org/t/experiment-highlighting-markdown-via-source-mapping/1132
I'm not sure if the project he's describing is js, though.

CommonMark.NET already has complete source mapping.

When I find time, I'll complete the source location information produced by commonmark.js (which currently gives you source location for block elements, but not inline elements).  I don't think this would be too hard.  https://github.com/jgm/commonmark.js/issues/28