This example displays the top 10 most populous countries as a rudimentary bar chart, using only rectangles with no axes or labels for context. The chart loads population data from the United Nations World Population Prospects 2019 dataset via a CSV URL. Built with React and D3 v5, it uses `csv` to fetch and parse the data, then `scaleBand` and `scaleLinear` to map country names and population values to the SVG canvas dimensions. The visualization updates the displayed bars once the data is loaded, initially showing a “Loading…” message.