@mui/material/esm/Toolbar/toolbarClasses.js

Material UI is an open-source React component library that implements Google's Material Design. It's comprehensive and can be used in production out of the box.

import generateUtilityClasses from '@mui/utils/generateUtilityClasses';
import generateUtilityClass from '@mui/utils/generateUtilityClass';
export function getToolbarUtilityClass(slot) {
  return generateUtilityClass('MuiToolbar', slot);
}
const toolbarClasses = generateUtilityClasses('MuiToolbar', ['root', 'gutters', 'regular', 'dense']);
export default toolbarClasses;