This example shows a yellow smiley face rendered as an SVG, composed of a circular background, two eyes, and an arc-shaped mouth. The React components are split into separate ES6 module files, with the mouth’s path generated using D3’s `arc` generator. The face is centered via an SVG `<g>` transform, with all dimensions (eye offsets, radii, stroke width) passed as props. The visualization uses React 16.9, D3 v5, and plain SVG elements, with no external data source.