This example displays a large, centered message using React. The app renders a single div element with the text scaled to 13em, demonstrating basic React component structure and styling. Built with React 16.13.1 and ReactDOM, it uses the `useState`, `useCallback`, and `useEffect` hooks along with d3’s `csv` function to fetch and process external data. The code references a CSV URL for data loading, though the actual visualization behavior is not implemented, serving as a minimal starter template.