This example shows a yellow smiley face with two black eyes, rendered inside a scalable SVG canvas that fills the browser window. The face is centered dynamically, with its size and feature positions calculated from the viewport dimensions. The visualization is built with React, using `ReactDOM.render` to draw SVG circles for the face, eyes, and stroke outlines. The code leverages React's component model to define the SVG elements, with coordinates and radii computed relative to the window's center and height.