This example shows a smiley face rendered as an SVG graphic, built with React and D3. The face consists of a yellow circle with a black stroke, two eye circles, and a mouth drawn as a curved arc shape. The code uses D3’s `arc` generator to define the mouth’s radii and angles, and React’s `ReactDOM.render` to render the SVG into the DOM. It uses precise, hard-coded coordinates to position elements, with all dimensions computed relative to the canvas center.