Hello HTML
This example shows a simple yellow smiley face rendered as an SVG, with two black eyes positioned on a circular face. It demonstrates the minimum setup for a React visualization. The code imports React and ReactDOM to render an `<App>` component that defines SVG circle elements using JSX. Hardcoded values for the face radius, eye offsets, and stroke width control the layout, while React 16.12 and ReactDOM 16.0 are loaded via CDN in the HTML page. The rendering approach relies on React’s virtual DOM to update the SVG output directly.