Customizing Axes
This bar chart displays the population of the top 10 most populous countries, using 2018 estimates from the United Nations World Population Prospects. It demonstrates how to customize D3 axes, including formatting tick labels with abbreviations (e.g., "1.42B") and removing axis domain lines. The chart uses `d3.scaleLinear` and `d3.scaleBand` for scaling, with `d3.axisBottom` and `d3.axisLeft` for the axes.