Built with React and D3 v5, this example renders a cheerful smiley face as an SVG graphic. The code uses D3's `arc` generator to create the red mouth, while React's `ReactDOM.render` mounts the component into the DOM. Yellow circles form the face and eyes, with pink blushes positioned on the cheeks. All shapes are drawn declaratively through React JSX, using SVG elements like `<circle>` and `<path>` within a single `<g>` group centered on the canvas, with dimensions fixed at 960 by 500 pixels.