This example shows a yellow smiley face drawn in an SVG canvas using React and D3.js. The face is centered at 960 by 500 pixels, with two black eye circles and a curved mouth path generated by the D3 `arc` function, which defines inner and outer radii and start/end angles. The code uses ReactDOM to render the SVG elements, and D3’s `arc` API to construct the mouth’s path. The source is a static HTML page that loads React and D3 from unpkg.