This example displays a bar chart of the top 10 most populous countries, using data from the United Nations World Population Prospects 2019. The chart renders as SVG via React, with D3’s `scaleBand` and `scaleLinear` mapping country names and population values. Axes are drawn manually: x-axis ticks and gridlines come from `xScale.ticks()`, while y-axis labels are positioned using the band scale’s domain and bandwidth.