This example demonstrates how to load external CSV data with React and D3, displaying a text summary of the dataset. It fetches CSS named colors from a GitHub gist using d3.csv, stores the parsed rows in React state via the useEffect hook, and renders the result as a message showing file size, row count, and column count. The visualization updates from a “loading” placeholder to the data summary once the asynchronous request completes, highlighting the integration of React’s state management with D3’s data-loading utilities.