Hello Smiley Face
This example renders a cheerful smiley face using React and SVG. It draws a yellow circle for the face, two black circles for eyes, and attempts to add a mouth using a D3 arc generator, though the mouth path is incomplete due to an API misuse. The visualization uses ReactDOM to render the SVG elements, with D3’s `arc` for the mouth. Dimensions and positions are calculated relative to the canvas size of 960 by 500 pixels.