Despite the title and an HTML comment containing a static SVG smiley face, the active React application renders a single QR code using the `QRCode` component from the Ant Design library (`antd`). The code imports React and ReactDOM, then mounts the QR code, which encodes the URL "https://ant.design/", into the root `div` element. The page is set to fill the viewport with no margin, while the QR code itself is rendered as an SVG via the library’s internal mechanisms.