src/index.tsx

import React from 'react';
import ReactDOM from 'react-dom/client';
import './index.css';
import App from './App';
import reportWebVitals from './reportWebVitals';

// 确保这段代码正确
const rootElement = document.getElementById('root');
if (!rootElement) throw new Error('Root element not found');
const root = ReactDOM.createRoot(rootElement);

root.render(
  <React.StrictMode>
    <App />
  </React.StrictMode>
);

reportWebVitals();