mdrender/.npm-scripts/funcs/markdownToHtml.js

const hubdown = require("hubdown");

module.exports = function(config, item) {
  return new Promise(function(resolve) {
    console.log("item content:", item.content);
    hubdown(item.content || "", { frontmatter: true })
      .then(doc => {
        console.log("Doc:", doc);
        resolve({
          ...item,
          ...doc
        });
      })
      .catch(e => console.log);
  });
};