This example renders a smiling face emoji as an SVG graphic, composed of a yellow circle for the face, two black circles for eyes, and a curved arc for the mouth. Built with React and D3.js v6, it uses the `d3.arc()` API to define the mouth’s path with specified radii and angular ranges. The `<svg>` element’s dimensions, positioning, and stroke properties are set directly through React props, with the entire emoji grouped and translated within the coordinate system.