This example shows a horizontal bar chart of 2019 telecom sale charges for the top 10 countries by population, rendered as purple SVG rectangles. It uses React hooks (`useState`, `useEffect`) to load and parse CSV data from a GitHub gist via `d3.csv`, then maps the values to a `d3.scaleBand` for the y-axis and `d3.scaleLinear` for the x-axis. The chart includes custom grid lines and tick labels generated from the scales, with the bars positioned through React’s JSX and D3’s scale functions.