This example shows a smiling face composed of a yellow circle, two eyes, and a mouth, all rendered in SVG. The code defines a reusable React component and uses D3’s `arc` generator to create the mouth path with specified inner and outer radii and angles. The face is centered using a group transform, with circles for the eyes and background positioned via absolute coordinates. React renders the SVG into a root div, while D3 v6 supplies the geometric calculations.