Smiley with React
A smiling face is drawn entirely with SVG shapes in a React component, with a yellow circle for the face, black circles for the eyes, and a curved arc for the mouth. The code uses React 16.13.1 with ReactDOM to render the component into the DOM, while the `arc` function from D3 v6 generates the mouth path. D3’s `arc` is configured with inner and outer radii, and start and end angles to create a simple smile. The visualization demonstrates a straightforward integration of D3 shape generators within a React rendering pipeline.