This example visualizes United Nations population data for 2020, rendering country names on a vertical band scale using React and D3. It loads the CSV dataset via `d3.csv`, parses population values, and maps countries to a `scaleBand` range. The React component uses `useState` and `useEffect` to asynchronously fetch and store the data, displaying a loading message until the dataset arrives. The chart’s axes and layout remain static, with only the parsed data structure prepared for further rendering, as the code does not include bar geometry or other visual marks.