How to collect all makeStyles jss in a react application into a separate file?

Question

React

Good afternoon!
I'm trying the material ui react example and there all the styles are passed through jss right in the component file. I collect the project with webpack and after that these styles are lost.
How can I catch these styles and add them to css? And what am I doing wrong anyway? after all, in fact, I won’t be able to use material ui react if I assemble it separately. Maybe some loaders or config fix?