Customizing Axes
This example displays a horizontal bar chart of the top 10 most populous countries in 2018, using data from the United Nations World Population Prospects. It shows how to customize D3 axes by removing the domain lines, applying tick formatting with `d3.format` to abbreviate numbers, and adding custom axis labels and a title. The visualization uses D3 v5 with `csv`, `scaleLinear`, `scaleBand`, `axisLeft`, and `axisBottom`, rendering bars in SVG with population scaled to thousands.