This example shows a horizontal bar chart of population figures for 30 countries in 2020, with a tooltip on each bar when hovered. The visualization is built with React and rendered as SVG, using D3 v5’s `scaleBand` and `scaleLinear` for axes. Data is loaded from a CSV via `d3.csv` and formatted with `d3.format`. The chart includes blue tick lines, gray tick labels, and green bars.