This example visualizes the top 10 most populous countries in 2019 using a horizontal bar chart rendered with SVG. The chart encodes population counts through bar lengths on a linear scale, while country names are positioned on a band scale. The application is built with React and D3 v5, using React hooks like `useState` and `useEffect` to load and manage data. D3's `csv`, `scaleBand`, `scaleLinear`, and `max` utilities handle parsing and scaling. Data is fetched from a GitHub Gist containing the 2019 population estimates.