Fork of Smiley Face Part III
This example shows a yellow smiley face composed of a circular head, two eyes, and an arc-shaped mouth, all rendered as SVG elements. The visualization is built with React components that generate the SVG markup, while D3’s `arc` function calculates the mouth’s path geometry. Key parameters like eye offset, radius, and stroke width are defined as constants. The code uses React 16.9 for component rendering and D3 v5 for the arc generator, with all shapes positioned relative to a central translation group.