Customizing Axes
This bar chart displays the top 10 most populous countries based on 2018 estimates from the United Nations World Population Prospects, with population values multiplied by 1,000 from the CSV data. The visualization demonstrates customized D3 v5 axes: a linear x-axis uses a tick formatter to abbreviate numbers (replacing ’G’ with ’B’) and includes an axis label, while the band y-axis removes its domain and tick lines for a cleaner look. The code relies on `scaleLinear`, `scaleBand`, `axisBottom`, `axisLeft`, and `format` from D3, rendering to SVG with margins, a title, and grid lines via negative tick sizes.