Customizing Axes
This bar chart shows the populations of the top 10 most populous countries, based on 2018 estimates from the United Nations World Population Prospects. It demonstrates how to customize D3 axes, including removing the y-axis domain and tick lines, formatting x-axis tick labels with `d3.format` to abbreviate numbers, and adding axis labels and a title. The chart uses `d3.scaleLinear` for the x-axis, `d3.scaleBand` for the y-axis, and `d3.axisBottom` and `d3.axisLeft` to generate the axes, rendered as SVG.