babel.config.js

const plugins = [
  [
    'component',
    {
      libraryName: 'element-ui',
      styleLibraryName: 'theme-chalk'
    }
  ]
]

// remove console.* in production
if (process.env.NODE_ENV === 'production') {
  plugins.push('transform-remove-console')
  // plugins.push(['transform-remove-console', { 'exclude': ['error', 'warn'] }])
}

module.exports = {
  presets: [
    // https://github.com/vuejs/vue-cli/tree/master/packages/@vue/babel-preset-app
    '@vue/cli-plugin-babel/preset',
    ['@babel/preset-env', { 'modules': false }]
  ],
  'env': {
    'development': {
      // babel-plugin-dynamic-import-node plugin only does one thing by converting all import() to require().
      // This plugin can significantly increase the speed of hot updates, when you have a large number of pages.
      // https://panjiachen.github.io/vue-element-admin-site/guide/advanced/lazy-loading.html
      'plugins': ['dynamic-import-node']
    }
  },
  plugins: plugins
}