This example shows a horizontal bar chart of the top ten countries by projected 2020 population, with labeled axes and gridlines drawn as SVG elements. It uses React hooks (useState, useEffect) to fetch and transform CSV data from a GitHub gist, then leverages d3.scaleBand and d3.scaleLinear for positioning and scaling. The chart renders entirely through React’s declarative JSX, while d3 provides the data parsing (csv) and scale/domain calculations. Loading state is shown with a large “Loading…” text until data arrives.