This example displays the top 10 most populous countries as a bare bar chart with no axes or labels, rendered as SVG rectangles. The React component fetches United Nations World Population Prospects 2019 data via d3.csv, then uses d3.scaleBand for the y-axis positioning and d3.scaleLinear with d3.max to map population values to bar widths. The visualization relies on React hooks—useState and useEffect—to load and slice the data, while d3.v5 and React 16.9 render the chart through ReactDOM.