This example displays a vertical stack of horizontal stripes, each colored according to a CSS named color from a loaded dataset. It loads the data from a CSV file using D3’s `csv` utility, then uses React hooks (`useState` and `useEffect`) to asynchronously fetch and store the data. The `App` component maps over each row to render a div with a background color taken from the `RGB hex value` column. A loading message appears until the data arrives, and the final rendering fills the page with 960-pixel-wide bands.