This example shows a smiling face built with React and rendered as an SVG, sized to fill the browser window. It first draws a yellow circle for the head, outlined with a black stroke, then places two black eye circles at symmetric offsets from the center. The code uses React 16.9 and ReactDOM to render the SVG elements, computing positions from the window’s inner width and height to center the face dynamically. No additional data or interaction is involved; the visualization is purely a static, programmatic illustration of geometric composition.