This example shows three identical smiley faces rendered side by side using React components that compose D3-generated SVG shapes. The face is built from separate React components for the background circle, eyes, and mouth, with the mouth created using the `d3.arc()` API. All elements are drawn on an SVG canvas via a `FaceContainer` wrapper, which centers the face using a translation transform. The React app maps over an array to create three instances of the face, each with fixed dimensions and coordinates.