Fork of Smiley Face Part III
This example shows a classic yellow smiley face rendered as a scalable vector graphic (SVG) composed of a large circle for the head, two smaller circles for eyes, and an arc-based mouth. The visualization is built with React components that leverage D3’s `arc()` generator to define the mouth’s path, while circle coordinates and radii are set as explicit values like `eyeOffsetX`, `eyeRadius`, and `mouthRadius`. The code uses React 16.9, D3 v5, and both libraries are loaded via UMD bundles.