This example shows a simple smiley face drawn with SVG circles, and a React app that renders a “Hello JSX” heading. It demonstrates a minimal integration of React and SVG on a single page, with both elements present but separate. The code loads React and ReactDOM from CDN, uses `ReactDOM.render` to mount the React component, and defines the SVG graphic directly in the HTML. The SVG includes a large yellow circle with two smaller black-outlined circles, all styled with stroke widths to suggest a face.