This example demonstrates how to load external data in a React application using D3 utilities. It fetches a CSV file containing CSS named colors via `d3.csv`, stores the result in React state with `useState` and `useEffect`, and displays a summary of the loaded data as text. The summary includes file size in kilobytes, row count, and column count, computed using `d3.csvFormat`. While loading, the view shows a “Loading…” message, and the data is rendered as plain text in an SVG-free layout.