This example demonstrates how to load and summarize CSV data asynchronously using React and D3. It fetches the CSS named colors dataset from a GitHub gist via D3's `csv` function, storing the result in React state with the `useState` and `useEffect` hooks. The rendered view displays a plain-text summary of the loaded data, including size in kilobytes, row count, and column count, calculated using `d3.csvFormat`. Until the data arrives, a “loading” message appears.