This example demonstrates how React and D3 can work together to load and summarize a dataset of CSS named colors. The application uses D3’s `csv` utility to fetch the remote data and React’s `useState` and `useEffect` hooks to manage the asynchronous loading state. Once the data arrives, a custom `message` function computes and displays the file size in kilobytes, the number of rows, and the number of columns using `d3.csvFormat` and array properties. A large monospaced `pre` element renders the result, with “Loading...” shown before the fetch completes.