Fork of Smiley Face Part II
This React-based SVG data visualization draws a smiley face that fills the entire browser window. The face consists of three circles: a yellow head with a black stroke, and two eye circles positioned symmetrically around the center point. The code calculates all dimensions dynamically from `window.innerWidth` and `window.innerHeight`, using constants like `eyeOffsetX`, `eyeOffsetY`, and `eyeRadius` to maintain proportion. It leverages the React 16.9.0 libraries (`react` and `react-dom`) to render the `<svg>` element directly into the DOM, with a `<g>` transform translating the origin to the screen's center.