How to export default ...?

how to write like export default withStyles(styles)(App) in haxe?

import {withStyles} from '@material-ui/core/styles'
// ...

const styles = theme => ({
    paper: {
        padding: theme.spacing(2),
        // ...
    },
    // ...
})

class App extends React.Component {
    render() {
        const {classes} = this.props
        // ...
    }
}

export default withStyles(styles)(App)

This particular example is included in material-ui lib: https://gist.github.com/kLabz/20f6e4dece9aa4c256af58514626b66f

As for defining externs for npm packages depending on export/import kind, this should still cover all (most?) cases: Using NPM modules from Haxe | Philippe.me

@kLabz ,how to deal with this in haxe ? array as object key

[theme.breakpoints.up(‘sm’)]:

inputInput: {


      width: '100%',

      [theme.breakpoints.up('sm')]: {

        width: '12ch',

        '&:focus': {

          width: '20ch',

        },

      },

    },

from here