This example shows a yellow smiley face rendered as an SVG graphic, composed of a circular head, two eyes, and a mouth arc. It demonstrates how to build a reusable chart component in React. The code uses React 16.9 for component structure, D3 v7’s `arc()` generator to create the mouth path, and renders entirely via SVG elements with hardcoded dimensions. The face is centered using a D3 `arc` helper, with positions calculated from constants for offsets, radii, and stroke widths.