This example shows a yellow smiley face rendered as an SVG, with two black eyes and a black outline, centered and scaled to fill the browser window. The face is constructed using React and ReactDOM, with circles positioned via SVG group transformations. It uses the `react` and `react-dom` production libraries, and the `window.innerWidth` and `window.innerHeight` properties to set the canvas dimensions. Eye and mouth offsets are defined as constants, and the face is drawn using SVG `<circle>` elements with `fill`, `stroke`, and `stroke-width` attributes.