This example demonstrates a minimal React application that, when run, displays the text “Hello React!” in large, centered type. The code sets up a React component using the `ReactDOM.render` method and imports both React and ReactDOM from their respective production UMD builds. It also loads D3.js version 6, but the accompanying data-fetching logic with `d3.csv` and a blank `csvUrl` remains unused, so no data or D3-based rendering is actively shown. The final output is purely the styled text message rendered through React’s virtual DOM.