This example demonstrates how to load and summarize a CSV dataset using React state and D3 utilities. The app fetches CSS named colors from a GitHub gist via `d3.csv`, stores the parsed data in React’s `useState` hook, and displays a text summary. The `message` function computes file size in kilobytes using `d3.csvFormat`, along with row and column counts. While loading, the interface shows the word "loading" until the asynchronous `useEffect` hook completes the data request.