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. The visualization highlights customized axes, with D3’s `axisBottom` and `axisLeft` used to render tick marks and labels, while `scaleLinear` and `scaleBand` map population and country values. Tick labels are formatted with `format('.3s')` to abbreviate numbers, replacing 'G' with 'B' for billions. The SVG chart removes default axis domains and lines, adds an axis label, and styles text and rectangles via CSS.