module.exports = { presets: [ [ '@babel/preset-env', { modules: false, loose: true } ], '@babel/preset-react' ], plugins: [ '@babel/plugin-proposal-class-properties', '@babel/plugin-proposal-export-default-from', '@babel/plugin-proposal-export-namespace-from' ], env: { development: { plugins: ['react-hot-loader/babel'] }, test: { plugins: ['@babel/plugin-transform-modules-commonjs'] }, production: { plugins: [ '@babel/plugin-transform-react-inline-elements', '@babel/plugin-transform-react-constant-elements' ] } } };