Native modules in elm source

[Libbum]

I'm taking a look at parcel & attempting to move an elm project which has a native module that requires node packages inside it.

My package.json has the following section:

"devDependencies": {
    "markdown-it": "^8.4.0",
    "markdown-it-katex": "^2.0.3"
  }

Then, somewhere in src/Native/Markdown.js I have the lines:

const md = require('markdown-it')(options.preset, options),
         mk = require('markdown-it-katex');
md.use(mk);

This was building with Brunch, but I'm having issues getting it sorted out here. Does your plugin support this?