This example demonstrates loading a CSV dataset containing CSS named colors with D3 utilities and managing the fetched state with React hooks. The application uses `useEffect` and `useState` to asynchronously call `d3.csv`, displaying a "Loading..." message until data arrives, then rendering a placeholder via `data.map()`. The `message.js` module defines a helper that summarizes the dataset’s size in kilobytes, row count, and column count using `d3.csvFormat`. The visualization relies on React 16.9, D3 v5, and the CSV hosted in a GitHub gist.