Smiley face
A smiley face is rendered as an SVG graphic within a React application. The face consists of a large yellow circle with a black outline, representing the head, and two smaller black circles for the eyes. The visualization is created using React and ReactDOM, with the SVG elements defined declaratively in JavaScript. The head's size and position are calculated relative to the canvas dimensions, and the eye positions are offset from the center. The code renders the graphic directly into the page's root element using `ReactDOM.render`.