Hello HTML
This example shows a simple static SVG rendering of a smiley face, with a large yellow circle for the head and two smaller black circles for the eyes. The page loads React and ReactDOM from CDN links, but the visible visualization is hand-coded SVG in the HTML body. The code also defines a minimal React app component that renders a heading, though it is not displayed in the SVG output. The example demonstrates basic HTML structure, inline CSS to remove margins, and integration of the React library.