This example shows a React component that loads CSS named color data from a CSV file using D3’s `csv` function, then displays a summary of the dataset’s size and structure. The data is fetched asynchronously and stored in React state via the `useState` and `useEffect` hooks. Once loaded, the `message` function computes the file size in kilobytes, row count, and column count using `d3.csvFormat` and the data’s `columns` property. Before the data arrives, the UI renders a simple “Loading…” placeholder.