This example builds a simple cartoon face inside an SVG canvas using D3.js and React-compatible JavaScript. It draws a yellow circular head with black strokes and adds a teal rectangle as a decorative element, positioning shapes via `select`, `attr`, and `append` calls from `d3`. The page renders in a fixed 960×500 SVG container, with styling handled through external CSS that removes margins and hides overflow. The code demonstrates fundamental SVG shape creation and attribute manipulation using D3’s declarative approach.