STS
probably you can do something similar to this https://github.com/facebookincubator/create-react-app/blob/master/packages/react-scripts/template/README.md#adding-a-css-preprocessor-sass-less-etc but in your case you'd install babel and styled-jsx to transpile css before starting the app
How can you use it with an ejected create-react-app? Please help!
Please answer on StackOverflow, so the answer gets more visibility 馃憤
https://stackoverflow.com/questions/49156164/add-styled-jsx-to-ejected-create-react-app-config
Just answered my own question above in the stackoverflow link 馃憤
Most helpful comment
Yes!