babel.config.js

/* eslint global-require: off */

const developmentEnvironments = ['development', 'test'];
const developmentPlugins = [require('react-hot-loader/babel')];
const productionPlugins = [
  require('babel-plugin-dev-expression'),
  require('@babel/plugin-transform-react-constant-elements'),
  require('@babel/plugin-transform-react-inline-elements'),
  require('babel-plugin-transform-react-remove-prop-types'),
];

module.exports = (api) => {
  const development = api.env(developmentEnvironments);
  return {
    presets: [
      [
        '@babel/preset-env',
        {
          useBuiltIns: 'usage',
          corejs: 2,
          targets: {
            esmodules: true,
            electron: require('electron/package.json').version
          },
        },
      ],
      require('@babel/preset-flow'),
      [require('@babel/preset-react'), { development }],
    ],
    plugins: [
      require('@babel/plugin-proposal-function-bind'),
      require('@babel/plugin-proposal-export-default-from'),
      require('@babel/plugin-proposal-logical-assignment-operators'),
      [require('@babel/plugin-proposal-optional-chaining'), { loose: false }],
      [
        require('@babel/plugin-proposal-pipeline-operator'),
        { proposal: 'minimal' },
      ],
      [
        require('@babel/plugin-proposal-nullish-coalescing-operator'),
        { loose: false },
      ],
      require('@babel/plugin-proposal-do-expressions'),
      [require('@babel/plugin-proposal-decorators'), { legacy: true }],
      require('@babel/plugin-proposal-function-sent'),
      require('@babel/plugin-proposal-export-namespace-from'),
      require('@babel/plugin-proposal-numeric-separator'),
      require('@babel/plugin-proposal-throw-expressions'),
      require('@babel/plugin-syntax-dynamic-import'),
      require('@babel/plugin-syntax-import-meta'),
      [require('@babel/plugin-proposal-class-properties'), { loose: true }],
      require('@babel/plugin-proposal-json-strings'),
      ...(development ? developmentPlugins : productionPlugins),
    ],
  };
};