This example shows a static smiley face composed of a large yellow circle with a black stroke, plus two smaller black circles for eyes, positioned against a minimal white background. The face is rendered directly in SVG markup within the HTML page, while a separate React app, using `ReactDOM.render`, attempts to display a simple “Hello JSX” heading. However, the React code is incomplete and does not return valid JSX, so the visible smiley face comes solely from the inline SVG elements, not from any React-generated output.