React Starter
This example displays the text “Hello React!” centered on the page in an extremely large font. It is a minimal React starter template that renders a single functional component using ReactDOM’s `render` method. The component returns a `<div>` with the class `message`, which is styled via CSS to set the font size and alignment. The page loads React 16.13.1 from the UMD bundles and executes the compiled `bundle.js` containing the JavaScript code. No external data or visualization libraries are involved.