This example shows a yellow smiley face rendered as an SVG, with two eyes and a circular head that scales to fit the browser window. Built with React and ReactDOM, it defines constants for eye placement, radius, and stroke width, then draws the face using SVG circle elements inside a transformed group. The face is centered dynamically using the window’s inner width and height, with a black outline around the head. The code uses React’s JSX syntax and the ReactDOM.render method to mount the component.