This example shows how React and D3 work together to load and summarize a CSV dataset of CSS named colors. The app displays a text readout with the file size in kilobytes, row count, and column count once the data arrives, or a "Loading..." placeholder beforehand. It uses React's `useState` and `useEffect` hooks to manage asynchronous state, and D3's `csv` function to fetch and parse the remote data. The `message.js` helper formats the summary using `d3.csvFormat` to calculate the byte length.