Hello HTML
This example renders a simple smiley face using React and D3.js, drawing SVG shapes on a yellow circular background with black stroke. The face features two eyes and a mouth created with the `arc()` generator from D3, positioned via a group transform. React manages the component structure and rendering into the DOM, while D3’s arc API defines the mouth’s inner and outer radii and angles. The result is a minimal, interactive-free visualization demonstrating how to combine React’s declarative UI with D3’s geometric utilities for static SVG output.