src/main.tsx

import React, {StrictMode, useEffect, useState} from 'react';
import {createRoot} from 'react-dom/client';
import App from './App.tsx';
import './index.css';

function ErrorBoundary({ children }: { children: React.ReactNode }) {
  const [hasError, setHasError] = useState(false);
  const [errorMsg, setErrorMsg] = useState('');

  useEffect(() => {
    const errorHandler = (event: ErrorEvent) => {
      setHasError(true);
      setErrorMsg(event.message + '\n' + (event.error?.stack || ''));
    };
    window.addEventListener('error', errorHandler);
    return () => {
      window.removeEventListener('error', errorHandler);
    };
  }, []);

  if (hasError) {
    return (
      <div style={{ padding: 20, color: 'red', fontFamily: 'monospace', whiteSpace: 'pre-wrap', background: 'white' }}>
        <h2>Something went wrong.</h2>
        <p>{errorMsg}</p>
      </div>
    );
  }

  return <>{children}</>;
}

createRoot(document.getElementById('root')!).render(
  <StrictMode>
    <ErrorBoundary>
      <App />
    </ErrorBoundary>
  </StrictMode>,
);