This example shows a horizontal bar chart of population data for ten countries, with labeled axes and rectangular marks scaled by population values. The visualization uses React components to render SVG elements, leveraging D3’s `scaleBand` and `scaleLinear` for positioning and scaling. Axes are custom-built from D3 ticks and domain mappings, while data is loaded asynchronously from a CSV file via D3’s `csv` function. The chart updates reactively through React state management, with a loading message displayed until the dataset arrives.