This example demonstrates how to load and summarize a CSV dataset in a React application using D3 utilities. It fetches named CSS color data from a GitHub gist via `d3.csv` and stores the parsed rows in React state with the `useState` and `useEffect` hooks. While the data loads, the app displays a "Loading..." message; once received, it uses the `message` function to report the dataset’s size in kilobytes (via `d3.csvFormat`), row count, and column count in a large monospace `<pre>` element.