Babel@6/7 doesn't export default module.exports any more - T2212 Kill CommonJS default export behavior
It means in a ES6 module, you have to use require like:
const A = require('a').default; transform:
const A = require('a'); into
function __require_default_func__(module) { return module && module.__esModule ? module["default"] : module; } const A = __require_default_func__(require('a'));string/regexp/function/array, exclude module
{ plugins: [ ['transform-require-default', { exclude: "lodash", exclude: /lodash/, exclude: [ /lodash/, "react" ], exclude(module) { return module === 'lodash'; } }] ] }