This example renders an emoji-like smiling face with eyes, eyebrows, and an open mouth using React and SVG. The face is drawn with circles, lines, and a path computed by d3’s `arc` generator, all positioned within a transformed group. Dimensions like eye offset, radius, and mouth width are stored as constants, and the full viewport is filled with the SVG using inline styles. The code demonstrates combining React’s component model with D3’s shape utilities for static, declarative visualization.