This example shows a smiling face constructed with SVG circles and an arc-shaped mouth, rendered at the center of a 960×500 canvas. The face includes a yellow head with a black stroke, two eyes, and a mouth drawn using a D3 arc path. The code combines React for component structure with D3’s `arc` API to generate the mouth’s path, while setting coordinates and dimensions through inline variables. SVG elements are positioned within a translated group, and styling is applied via attributes like `stroke-width` and `fill`.