This example demonstrates how to load and summarize CSV data by combining D3 data utilities with React state management. The code uses D3's `csv` function to fetch a dataset of CSS named colors, then displays a text summary showing the file size in kilobytes, row count, and column count. React's `useState` and `useEffect` hooks manage the asynchronous data loading, with a "Loading..." message shown before the data arrives. The visualization is rendered as SVG in a minimal interface that dynamically updates once the data is parsed.