I have a library npm module (my-test-lib) and a create-react-app demo site (called demo-site) as a separate module to showcase the my-test-lib. The my-test-lib library makes use of Javascript's private member variables (#) syntax.
Because my-test-lib is only found locally, npm link is used to make demo-site aware of my-test-lib.
Attempting to npm start the demo site produces a syntax error within my-test-lib at the private member "#" tokens.
The linked my-test-lib app doesn't require babel to run. Private members are natively supported in node and why is demo-site's babel configuration trying to control code in linked modules anyways?