This example demonstrates loading external data with D3 utilities while managing it through React state. The application fetches a CSV file containing CSS named colors from a GitHub gist, then displays a summary of the loaded dataset, including file size in kilobytes, row count, and column count. It uses React’s `useState` and `useEffect` hooks to handle the asynchronous data loading, along with `d3.csv` for parsing, `d3.csvFormat` for measuring data size, and `ReactDOM.render` to mount the component. The interface initially shows a "Loading" message before presenting the computed statistics.