Run next commands in terminal:
npm i
npm run-script build
npm run-script run
As a result output/lib2.js - generated by webpack contains incorrect export:
result: file:///C:/Dropbox/webpack_es6export_bug.fit/output/lib2.js:46
/******/ export { __webpack_exports__ReactCropper as ReactCropper };
^^^^^^
SyntaxError: Unexpected token 'export'