babel.config.js

module.exports = function(api) {
  api.cache(true);

  const presets = [
    '@babel/preset-react',
    '@babel/typescript',
    [
      '@babel/preset-env',
      {
        targets: {
          node: 8
        }
      }
    ]
  ];
  const plugins = [
    [
      '@babel/plugin-transform-modules-commonjs',
      {
        lazy: () => true
      }
    ],
    'babel-plugin-transform-typescript-metadata',
    ['@babel/plugin-proposal-decorators', { legacy: true }],
    ['@babel/plugin-transform-runtime'],
    ['@babel/plugin-proposal-object-rest-spread'],
    ['@babel/plugin-proposal-class-properties'],
    [
      '@babel/plugin-transform-async-to-generator',
      {
        module: 'bluebird',
        method: 'coroutine'
      }
    ]
  ];

  return {
    presets,
    plugins,
    only: ['**/*.ts', '**/*.tsx', 'src/extensions/flows/task/container-script.js'],
    ignore: ['components/*']
  };
};