This example shows how to build a smiley face with animated eyebrows using D3.js and SVG. It uses D3’s `select` and `arc` APIs to create circles for the eyes and face, and a path for the mouth, while the eyebrows are not yet implemented in the sampled code. The face is drawn on an SVG canvas sized 960 by 500 pixels, with yellow fill and black stroke. The code demonstrates fundamental DOM manipulation and attribute setting with D3 v5.