This example demonstrates loading CSV data in a React component with D3, displaying the dataset’s size in kilobytes, row count, and column count as text. The app uses React’s `useState` and `useEffect` hooks to fetch the data asynchronously via `d3.csv` from a GitHub gist. Once loaded, the `message` function formats the summary using `d3.csvFormat` to calculate byte length. The visualization renders plain SVG-less text inside a `<pre>` element, showing a loading state until the data arrives.