This example demonstrates asynchronous data loading in a React component using D3 utilities, fetching a CSV of CSS named colors from a gist URL via `d3.csv`. While the data loads, a "Loading..." message displays; once resolved, the app maps each row to a colored horizontal `<div>` strip whose background corresponds to the color’s RGB hex value. React hooks (`useState`, `useEffect`) manage the asynchronous state, with D3 as the data-handling library and React 16.9 rendering the result.