This example demonstrates a minimal data-loading workflow using React and D3. It fetches a CSV file of CSS named colors via the `csv` function from D3, stores the parsed data in React state with `useState`, and triggers the fetch inside a `useEffect` hook. While the data loads, the interface displays a "Loading..." message; once ready, it renders a summary of the dataset—its size in kilobytes, row count, and column count—formatted as a large text block. The code uses React DOM for rendering and D3’s `csvFormat` to calculate the file size.