Smiley face
A classic smiley face drawn with React components and D3's arc generator. The face uses two black circles for eyes with white highlights, a yellow circle for the head with a black stroke, and a D3-generated mouth arc. The arc's start and end angles create a smiling curve, positioned at the center of a 960 by 500 SVG canvas. React renders the SVG elements while D3 v7 provides the arc path data.