This example displays a horizontal bar chart of the top ten countries by 2020 population. It uses React's `useState` and `useEffect` hooks to asynchronously load CSV data from a GitHub gist before rendering SVG rectangles. The visualization maps population values to bar widths using D3's `scaleLinear`, while country names are positioned along the y-axis with `scaleBand`. Rendering is handled entirely through React's declarative SVG output, with the chart updating once the data has been fetched.