This example renders a yellow smiley face in an SVG canvas using React and D3. The visualization shows a large yellow circle with two eyes and a mouth arc, all positioned relative to the canvas center. The code defines the mouth using D3’s `arc` generator, specifying inner and outer radii and angular start/end angles to create the curved line. The SVG is generated directly through React’s declarative syntax, with all geometric properties (radii, offsets, stroke widths) computed as constants in JavaScript.