This example demonstrates the composition of a data-loading pipeline using D3 and React hooks, displaying a summary of CSS color data fetched from a GitHub gist. It renders text output showing the dataset’s file size in kilobytes, row count, and column count. The code uses `useState` and `useEffect` to asynchronously load data via `d3.csv`, then formats the result with `d3.csvFormat`. React 16.9 manages the component lifecycle, while D3 v6 handles CSV parsing and formatting.