This example presents a horizontal bar chart of the top 10 countries by population in 2020, encoded as SVG rectangles with margins applied around the plot area. It uses React to manage state and D3’s `scaleBand` and `scaleLinear` for positioning, plus `csvParse` to process UN population data fetched from a GitHub gist. A custom `loadData` function loads the CSV, while D3’s `ticks()` generates axis ticks and gridlines, with text labels for both x and y axes.