This example shows a horizontal bar chart of country populations, with bars rendered as styled SVG rectangles and axes displaying formatted tick labels. The chart uses React to manage component state and rendering, while D3 v5 utilities (scaleBand, scaleLinear, max, format, and csv) handle data loading, scaling, and number formatting. Data comes from a UN population prospects CSV fetched via d3.csv, and the chart is drawn entirely with SVG elements, including custom axle components for the left and bottom axes.