This example shows a React app that asynchronously loads a CSV dataset of CSS named colors using D3’s `csv` utility, then displays a text summary of its contents. While the data is loading, the interface shows “Loading...”; once resolved, the app renders a `<pre>` block with the file size in kilobytes, the number of rows, and the number of columns. The code uses React hooks (`useState` and `useEffect`) to manage state and trigger the data fetch, with a custom `message` function that relies on `d3.csvFormat` to compute the byte length. The visualization is minimal, focusing on data loading behavior rather than graphical rendering.