This example demonstrates how to load data with D3 utilities and manage it with React state. It fetches a CSV file from a GitHub gist using D3’s `d3.csv`, then displays a summary of the dataset via a React component. The summary shows the file size in kilobytes, the number of rows, and the number of columns, computed using `d3.csvFormat`. The visualization uses React’s `useState` and `useEffect` hooks to asynchronously load the data and update the display, rendering a plain-text message with a loading state initially.