dirname

There have been proposals about exposing these variables through import.meta, but for now, you need a hacky workaround that I found here:

// expose.js
module.exports = {__dirname};

// use.mjs
import expose from './expose.js';
const {__dirname} = expose;

In Node.js 10 there's an alternative that doesn't require creating multiple files:

import path from 'path';

const __dirname = path.dirname(new URL(import.meta.url).pathname);