A smiley face is drawn as a circle on a 960-by-500 SVG canvas, with a yellow fill and a thick black outline, plus two smaller unfilled circles for eyes. The face is centered and uses hardcoded offsets for eye placement. The code imports React and ReactDOM directly and renders the SVG via `ReactDOM.render`, with no external charting library, relying instead on raw SVG elements like `<circle>`. The data is entirely programmatic, with no external dataset.