This example displays a summary of CSS named color data loaded from a CSV file, showing file size in kilobytes, row count, and column count. It combines React’s `useState` and `useEffect` hooks with D3’s `d3.csv` and `d3.csvFormat` functions to fetch and measure the dataset. The app renders either a "Loading..." message or the computed statistics inside a large `<pre>` element, demonstrating a straightforward pattern for integrating asynchronous D3 data loading with React state management.