A minimalist smiley face is drawn in a web page using React and D3. The yellow circular face, with its stroke, two eyes, and an arc-shaped mouth, is rendered as SVG elements. The code defines separate React components for the background circle, eyes, and mouth, which are then composed in an `App` function. The D3 `arc` API generates the mouth path, while React and ReactDOM manage the UI, all running within an HTML page that loads these libraries.