This example shows a bar chart of the top 10 countries by 2020 population, with bars extending horizontally from a shared left edge. The chart initially displays a loading message, then renders the data using React and D3’s `scaleBand` and `scaleLinear` to map country names to y-positions and population values to bar widths. Data is loaded asynchronously from a CSV file using `d3.csv`, and the visualization is drawn as SVG rectangles within a fixed-size viewport.