var rootEl = document.getElementById("root");
if (rootEl.hasChildNodes()) {
  ReactDOM.hydrateRoot(rootEl,
    <React.StrictMode>
      <App />
    </React.StrictMode>
  );
} else {
  ReactDOM.createRoot(rootEl).render(
    <React.StrictMode>
      <App />
    </React.StrictMode>
  );
}