This example shows a bar chart of the top 10 countries by population in 2020, rendered as SVG elements via React. The underlying CSV data is fetched and parsed with D3’s `csv` utility, then scaled using `scaleBand` and `scaleLinear`. React’s `useEffect` and `useState` manage asynchronous data loading, while `ReactDOM.render` mounts the app. Each bar’s height and width are derived from D3’s `max` and scale functions, mapping country names and population values to screen coordinates.