Fork of Smiley Face Part II
A dynamic smiley face fills the browser window, rendered as a yellow circle with black-stroked outline, two eyes, and a mouth using React components. The SVG drawing uses window dimensions to center the face and position facial features relative to the viewport. Props define eye offsets, radii, and stroke widths, while `<g>` transforms handle centering. The implementation relies on React 16.9 and ReactDOM, constructing the visualization declaratively via JSX within a single `<svg>` element that updates with window size.