This example demonstrates a minimal React and D3 integration that loads a CSV file and displays its metadata—file size, row count, and column count—as plain text. The app uses React hooks (`useState` and `useEffect`) to fetch data asynchronously via `d3.csv` from a GitHub gist URL, then formats and renders the statistics in a `<pre>` element. The code initializes a React root with `createRoot`, while D3 v7 handles the CSV parsing, showing how the two libraries can work together for data loading and display.