Smiling Face
This example presents a cheerful animated face built with React and SVG, rendered in a web browser. The face features a yellow circle, eyes, eyebrows, and a mouth, with the eyebrows moving up and down in a looping animation. The code uses the D3.js library, specifically `d3.select`, `d3.arc`, and the `.transition().duration()` API to create the motion. The shape is composed of SVG elements, including circles, rectangles, and a path for the mouth, which are constructed programmatically based on computed values. The animation runs continuously, shifting the eyebrow group vertically between two positions.