This example displays a loading screen followed by a vertical stack of colored horizontal bars, one for each CSS named color. The page initially shows a large “Loading...” message, then renders the dataset by mapping each color’s RGB hex value to a thin div’s background. The code uses React’s `useState` and `useEffect` to asynchronously fetch the CSS named colors CSV via D3’s `csv` utility, then maps the resulting array to styled divs with a fixed width of 960 pixels and height of 4 pixels each.