This example demonstrates how D3 and React can work together to load and summarize external data. It fetches a CSV file of PR boxers using D3’s `csv` method, then displays the dataset’s size in kilobytes, row count, and column count as plain text. The React `useState` and `useEffect` hooks manage the asynchronous data loading, while a custom `buildMessage` function formats the information. The visualization is rendered as an SVG-less `<pre>` element, showing a minimal text-based summary rather than charts.