Simple way to override & remove async/await regenerator transform nonsense from `babel-preset-react-app`.

.babelrc

{
  "presets": [
    "./config/babel-preset-myapp"
  ],
  "plugins": [
    "transform-class-properties"
  ]
}

babel-preset-myapp.js

const preset = require('babel-preset-react-app')
const REGENERATOR = require.resolve('babel-plugin-transform-regenerator')
const RUNTIME = require.resolve('babel-plugin-transform-runtime')

const plugins = preset.plugins.map(plugin => {
  // remove regenerator plugin
  if (plugin[0] === REGENERATOR) return false

  // remove regenerator from runtime plugin
  if (plugin[0] === RUNTIME) {
    return [plugin[0], Object.assign({}, plugin[1], {
      regenerator: false
    })]
  }
  return plugin
}).filter(Boolean)

module.exports = Object.assign({}, preset, {
  presets: [[
    require.resolve('babel-preset-env'), {
      targets: {
        browsers: [
          'last 1 Chrome versions',
          'last 1 Firefox versions'
        ]
      },
      exclude: ['transform-regenerator'],
      modules: false
    }
  ]],
  plugins
})