This example demonstrates loading and summarizing a dataset of CSS named colors. The visualization displays a text summary showing the data’s size in kilobytes, row count, and column count, with a loading message before the data arrives. The app uses React’s `useState` and `useEffect` hooks to manage the asynchronous data loading, while D3’s `csv` function fetches and parses the remote CSV file. The `message` function formats the summary using `d3.csvFormat` to calculate file size.