import React from 'react'; import ReactDOM from 'react-dom'; import App from './components/App'; import {StyledEngineProvider} from '@mui/material/styles'; import {RecoilRoot} from 'recoil' ReactDOM.render( <StyledEngineProvider injectFirst> <RecoilRoot> <App/> </RecoilRoot> </StyledEngineProvider>, document.getElementById('root') );