This example shows a color swatch visualization built from a CSV of CSS named colors, with each color rendered as a horizontal strip stacked vertically to fill the viewport. The data is loaded using D3's `csv` utility from a GitHub gist, while React manages the component state and renders the strips using inline styles that set the background color and height. The visualization uses React hooks (`useState`, `useEffect`) to asynchronously fetch and store the data, displaying a “Loading...” message until the CSV arrives.