This example shows a smiley face composed of a yellow background circle, two eyes, and a curved mouth, all rendered as SVG elements. The components are built with React function components and use d3.v6’s `arc` generator to define the mouth path. The SVG is centered via a translate transform, with fixed dimensions and stroke widths. The code relies on React and ReactDOM for rendering, and d3 for the arc shape, producing a static, standalone visualization.