This example renders a static smiley face as a yellow circle with a black outline using D3 v7 within a React 17 application. The SVG is selected via `d3.select` and sized from its width and height attributes, with the circle’s radius set to half the container height. The visualization demonstrates basic SVG shape creation with D3’s `select` API, applying fill and stroke styles, and is rendered through React’s DOM integration using the included bundle.