This example demonstrates how to load and summarize a CSV dataset using D3 and React. The code fetches a list of CSS named colors via `d3.csv` and stores the result in React state with the `useState` and `useEffect` hooks. While loading, the display shows “loading,” then renders a message generated by `d3.csvFormat` that reports the data’s size in kilobytes, row count, and column count. React 16.9 and D3 v5 are used together, with the data sourced from a GitHub gist.