Smiley Face Part II
A React application renders a large yellow circle centered on the screen, with two black eye dots positioned symmetrically above the horizontal midline, leaving space for a mouth. The SVG canvas fills the browser window, with all coordinates computed from window dimensions. The code uses React 16.9.0 and ReactDOM, constructing the graphic with SVG `<circle>` elements, where the face’s outline receives a stroke width of 20 pixels. The eyes are placed using `cx`, `cy`, and `r` attributes, while a transform group translates the drawing to the screen’s center.