Fork of Hello HTML
A React and D3 v5 example renders a yellow smiley face as an SVG, with a circular head, black stroke, square eyes, and an arc-based mouth. The code uses the `arc` generator from `d3` to create the mouth path, while React manages the component structure and JSX for the SVG elements. The visualization is rendered client-side in a browser, with the drawing centered and sized to fit the viewport.