dangerouslyUseGlobalCSS not working

I did a little debugging to figure out why dangerouslyUseGlobalCSS is not working, and it seems that styleSheet.options.classNamePrefix is undefined. My app was created with create-react-app, so this might be a problem with how webpack obfuscates class names? Is there any known workaround for this?

• This is a v1.x issue.
• I have searched the issues of this repository and believe that this is not a duplicate.

Steps to Reproduce

Link: Here’s a sample code showing the problem.

import * as React from 'react';

// @ts-ignore
import JssProvider from 'react-jss/lib/JssProvider';
import {
    createGenerateClassName, MuiThemeProvider, createMuiTheme, withStyles
} from '@material-ui/core/styles';

const generateClassName = createGenerateClassName({
    dangerouslyUseGlobalCSS: true,
    productionPrefix: 'c',
});

const styles = () => ({
    root: {
        backgroundColor: 'red',
    },
});

class ASDQ extends React.PureComponent<any, {}> {
    render() {
        const { classes } = this.props;
        return (
            <div className={classes.root}>abc2</div>
        );
    }
}

const B = withStyles(styles)(ASDQ);

export const App = () => (
    <JssProvider generateClassName={generateClassName}>
        <MuiThemeProvider theme={createMuiTheme()}>
            <B/>
        </MuiThemeProvider>
    </JssProvider>
);

Context

Your Environment

Tech	Version
Material-UI	v1.2.0
React	16.4.1
browser	chrome
etc.

[oliviertassinari]

@briman0094 I haven’t anticipated this extra logic: https://github.com/mui-org/material-ui/blob/e15e3a27d069a634ed6a8c7d9b208478e5ade64c/packages/material-ui/src/styles/createGenerateClassName.js#L62 Hum, It’s probably a requirement we should remove.

[ArcanoxDragon]

Is there an additional step that has to be taken for custom components outside MUI? I’m writing a button wrapper and despite being inside my JssProvider and having the {name: "Whatever"} in my call to withStyles, my classes are still being suffixed by a number. All the default MUI classes are deterministic but my custom ones aren’t.