This example shows a yellow smiley face drawn with React and SVG, centered and scaled to fill the browser window. The face consists of a large circle for the head, two smaller circles for eyes, and relies on the SVG coordinate system for positioning. Using React 16.9 and ReactDOM, the code renders SVG elements with JSX, computing dimensions dynamically from `window.innerWidth` and `window.innerHeight`. The implementation uses hardcoded offsets for facial features, while the head radius adapts to the viewport height, creating a responsive visual.