This example demonstrates how to load external data in a React application using D3 utilities, displaying a summary of the dataset’s size, row count, and column count. The code uses the `useState` and `useEffect` hooks to manage data asynchronously, calling `d3.csv` to fetch a CSV file from a GitHub gist. Once loaded, the data is rendered as plain text in a `<pre>` element, with a “Loading…” placeholder shown until the fetch completes. The visualization highlights the integration of React’s state management with D3’s data-loading APIs.