Fork of Smiley Face Part IV
This example renders a smiley face in a React component, using D3’s `arc` generator to draw the mouth in two curved segments while the face, eyes, and stroke are simple SVG circle elements. The layout is computed with fixed dimensions and offsets, and the code relies on React’s declarative JSX for structure, with D3 v5 handling the arc path calculations. The page imports React, ReactDOM, and D3 from CDNs, and the entire visualization is static, with no interactivity or data binding.