This example shows a horizontal bar chart of the top ten countries by population in 2020, rendered as an SVG via React. It loads CSV data from a GitHub gist using D3’s `csv` utility, then maps the data to `rect` elements inside a `<g>` group. The scales—`scaleBand` for countries and `scaleLinear` for population—are created with D3 v5, while React’s `useState` and `useEffect` manage the asynchronous data fetch and re-render. The chart displays no axes or labels, focusing solely on the bars’ lengths.