This example demonstrates how to load external CSV data into a React application using the `csv` method from d3. The code sets up a React component with `useState` to hold the fetched data, initially `null`, and applies a Promise to populate it once the request completes. It includes a minimal HTML page with React and d3 loaded via CDN, rendering to a root div. The visualization currently shows only a loading state or confirmation of data arrival, without additional chart elements.