Let's Make a Face with D3.js
This example builds a cartoon face from SVG primitives using D3.js v7, starting with a yellow circle for the head and adding eyes, eyebrows, and a mouth. The code leverages D3’s `select` and `arc` APIs to attach elements to the SVG canvas and generate the mouth’s path. Positioning relies on numeric attributes like `cx`, `cy`, and `r`, with a group transformation applied for eye placement. The result demonstrates basic SVG shape composition and coordinate manipulation within a fixed 960×500 viewport.