This example shows a simple, yellow smiley face centered in an SVG viewport. It is built with React components, each rendering a specific part of the face: a background circle, two eyes, and a mouth created using the d3.arc function from D3 v5. The FaceContainer wraps all elements and applies a group translation to center the face. All shapes are drawn as SVG primitives, with styling applied via JSX attributes. The code uses ReactDOM to render the App component into the page’s root element.