mdast-highlight.js 
Highlight code blocks in Markdown files with highlight.js.
With npm do:
npm install mdast-highlight.js --save
mdast-highlight.js is designed to work with mdast-html:
var mdast = require('mdast');
var html = require('mdast-html');
var hljs = require('mdast-highlight.js');
var markdown = '```css\nh1 {\n color: red;\n}\n```\n';
var result = mdast.use([ html, hljs ]).process(markdown);
console.log(result);
//=> Compiled HTML with highlighted CSS!Pull requests are welcome. If you add functionality, then please add unit tests to cover it.
MIT © Ben Briggs