Custom register hook

register.js

// transform all imports with Babel
require('babel-core/register')

// include the environment polyfill
require('babel-polyfill')

// return empty objects for CSS imports
require.extensions['.scss'] = () => null
require.extensions['.css'] = () => null

// return empty strings for image imports
const emptyString = module => {
  module.exports = ''
}
require.extensions['.svg'] = emptyString
require.extensions['.png'] = emptyString

// hijack console.error to throw
console.error = error => {
  throw new Error(error)
}