Smiley Face Part II
A full-window SVG smiley face is drawn using React and D3 v7. Yellow circles form the head and eyes, with a black stroke for the outline, all positioned relative to the window center. The `arc` import from D3 is present but unused in the visible code. The rendering relies on ReactDOM to mount the SVG element and uses basic SVG shapes like `circle` with explicit coordinates and radius values.