Fork of Smiley Face Part V_CET
This example shows a yellow smiley face with black-outlined circular eyes and a curved mouth, rendered as an SVG inside a React application. The visualization is built by splitting reusable React components into separate ES6 module files—`BackgroundCircle`, `Eyes`, and `Mouth`—which are composed into a single `<svg>` element using React fragments. The mouth’s arc is generated with the `d3.arc` API from D3 v5, while the overall rendering relies on React 16.9 and ReactDOM. The face is centered on a 960×500 canvas with all geometric properties (offsets, radii, stroke widths) defined as constants in the main `index.js` file.