Fork of Smiley Face Part III
This example shows a classic smiley face built with React and D3, rendered as SVG. The face uses three circles for the head and eyes, while a D3-generated path creates the mouth arc. The code defines an arc generator with inner and outer radii and angled start/end points, then translates the entire group to center the composition. React manages the component structure, while D3's arc function calculates the mouth path geometry.