This example displays a horizontal bar chart of the top ten countries by 2020 population, using data loaded from a CSV file via `d3.csv`. A React component manages the loaded data with `useState` and `useEffect`, while D3’s `scaleBand` and `scaleLinear` map countries and population values to SVG coordinates. The chart renders SVG rectangles and grid lines, with axes omitted, and includes a loading message before data arrives.