Fork of Hello HTML
This example displays a yellow smiley face rendered as SVG in a React component, with black circular eyes and a curved mouth drawn using D3's arc generator. The face's head and eyes are created with SVG circle elements, while the mouth uses d3.arc with specified inner and outer radii and start/end angles to produce a downward-curving arc. The code imports React and ReactDOM to mount the component and uses D3 v6 for the arc path generation, with all elements centered within a 960×500 viewport.