.babelrc.js

const pkg = require('./package.json')
const { execSync } = require('child_process')
const pkgVersion = `${process.env.PKG_VERSION || pkg.version}`

// http://schacon.github.io/git/git-show
const buildDate = execSync('git show -s --format=%ci HEAD')
  .toString()
  .replace(/[\r\n]+$/, '')

const commitSha = execSync('git rev-parse --short HEAD')
  .toString()
  .replace(/[\r\n]+$/, '')

const plugins = [
  ['macros'],
  [
    'transform-define',
    {
      __VERSION__: pkgVersion,
      __DEV__: process.env.NODE_ENV !== 'production',
      __BUILD_DATE__: buildDate,
      __COMMIT_SHA__: commitSha
    }
  ]
]

if (process.env.NODE_ENV === 'production') {
  // plugins.push(['transform-remove-console', { exclude: ['error', 'warn'] }])
  // plugins.push(['transform-remove-console'])
}
module.exports = {
  presets: [
    [
      'next/babel',
      {
        'preset-env': {
          // debug: true,
          targets: {
            browsers: '>2%, not ie 11, not op_mini all'
          }
        }
      }
    ]
  ],
  plugins
}