Fork of Smiley Face Part II
A yellow smiley face (a circle with two eyes) fills the browser window, centered and scaled to the viewport dimensions. The visualization is built with React and rendered as an SVG, using ReactDOM to mount the component. The face’s size, eye positions, and stroke width are defined by JavaScript constants derived from `window.innerWidth` and `window.innerHeight`, with the face radius matching the viewport height minus half the stroke width. The code leverages React 16.9 and ReactDOM, with explicit SVG circle elements for the face and eyes, all grouped and translated to the screen’s center.