const App = () => {
  const exampleMemo = React.useMemo(() => 1 + 1, []);
  const exampleCallback = React.useCallback(() => 1 + 1, []);
  
  React.useEffect(() => {
    console.log('useMemo', exampleMemo);
    console.log('useCallback', exampleCallback);
  })


  return (
    <div>
    </div>
  )
}

const root = ReactDOM.createRoot(document.querySelector('#root'));
root.render(<App />);