I wrote a bit[1] about CSS Modules with React, but interestingly it looks like CRA isn't using babel-plugin-react-css-modules so I'm trying to figure out what they're doing instead.
[1] https://dev.to/daveirvine/postcss-with-css-modules-andreact-...
[1] https://dev.to/daveirvine/postcss-with-css-modules-andreact-...
import styles from "./style.css";
<Component className={styles.myClassName} />