This example shows a simple smiley face built with React and SVG, rendered on a 960 by 500 pixel canvas. The face uses a yellow circle with a black stroke for the head, two white eyes with black outlines, and a curved mouth generated with the d3 `arc()` function. The code structures each element as a React component, applying constant offsets and radius values defined in variables. It uses ReactDOM to render the SVG into the page, with D3 v7 providing the arc path data for the mouth.