index.js

import { getHello } from './some-dep'

console.log(getHello())

package.json

{
  "name": "webpack-bailout",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "start": "webpack-cli"
  },
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "webpack": "4.20.2",
    "webpack-cli": "3.1.2"
  },
  "dependencies": {}
}

some-dep.js

export function getDir() {
  // Change __dirname to __foo to make ModuleConcatenationPlugin work.
  return __dirname
}

export function getHello() {
  return 'hello'
}

webpack.config.js

module.exports = {
  mode: 'production',

  target: 'web',

  entry: './index.js',

  stats: {
    optimizationBailout: true
  },

  optimization: {
    minimize: false,
    namedModules: true,
  },
}