Customizing Axis
This bar chart displays the population of the top 10 most populous countries, using horizontal bars ordered by descending values. It customizes the axes by hiding the default axis lines and ticks, applying a tick formatter that abbreviates large numbers (e.g., converting "G" to "B"), and adding custom labels for the x-axis and title. The visualization is built with D3 v5, using `scaleLinear`, `scaleBand`, `axisLeft`, `axisBottom`, and `format`, with data loaded from a CSV file and rendered as SVG rectangles.