This example renders a simple face using React and SVG, consisting of a yellow circle for the head and two smaller black circles for the eyes. The positioning is computed from the SVG dimensions and offsets defined in the JavaScript. The code is written as a React function component that returns JSX, which is then mounted into the DOM via `ReactDOM.render`. The HTML page loads React and D3 from a CDN, and CSS resets the body margin for a clean canvas.