This example shows a simple, static SVG smiley face composed of three circles: a yellow head with a black border and two black eyes. It is a React-based fork of a tutorial, with the ReactDOM render call displaying a placeholder “Hello JSX” heading. The SVG markup is embedded directly in the HTML, using explicit `cx`, `cy`, `r`, and `stroke-width` attributes to position and style the shapes, while the `index.js` file sets up the React application with `react` and `react-dom`.