This example displays a horizontal bar chart of the top 20 countries by 2010 population, sourced from a CSV file hosted on GitHub. Built with React and D3 v5, it renders the visualization as an SVG. The code uses `d3.scaleBand` for the categorical y-axis, `d3.scaleLinear` for the numeric x-axis, and `d3.format` for tick labels, with hover tooltips provided by SVG `<title>` elements.