This example shows a classic smiley face constructed entirely with SVG shapes, rendered through React and D3.js. The face is composed of a yellow circle with a black stroke, two eyes, and a mouth made from a D3 arc path, with additional corner arcs to create a smile. The visualization uses D3’s `arc` API to define the mouth geometry and React to render the SVG elements declaratively, with a red background. The code sets fixed dimensions and positions for each feature, demonstrating how D3’s path generation can integrate with React’s component model.