This example demonstrates how to construct a smiley face using D3.js version 5, focusing on fundamental DOM manipulation with SVG elements. The code explicitly appends a group and a circle element to the SVG canvas, positioning them at the center of a 960×500 viewport. It uses the `select` and `append` methods from the `d3` namespace to build the geometric face outline, with a transparent fill and black stroke. The visualization is purely programmatic, with no external data source, and includes a static smile path defined directly in the HTML markup.