This example demonstrates a horizontal bar chart of the top 10 most populous countries, using a custom-styled axis to improve readability. The chart maps population values to bar lengths and country names to vertical bands, with the x-axis formatted in compact notation (e.g., “1.41B”) via `d3.format`. The bar chart is rendered in SVG using D3 v6, with `d3.scaleLinear` for the x-scale and `d3.scaleBand` for the y-scale. Both axes are customized by removing default domain lines and adding tick marks that extend across the plot. Population data is loaded from a CSV file and multiplied by 1000 before rendering.