- Fix babel transpilation include/exclude logic to be more efficient. This also fix a very weird bug
TypeError: Cannot assign to read only property 'exports' of object '#<Object>'.(#1868)
If you are still encountering the error. Please check whether you use module.exports for your .js file instead of doing export (mixing CJS and ES). See https://github.com/webpack/webpack/issues/4039#issuecomment-477779322 and https://github.com/webpack/webpack/issues/4039#issuecomment-273804003 for more context.