This example displays the top 10 most populous countries as a horizontal bar chart with custom axes. It uses React hooks (useState, useEffect, and useCallback) to load data from the United Nations World Population Prospects 2019 via d3.csv, then renders SVG bars and axes. The chart builds axes manually with d3.scaleBand and d3.scaleLinear, using d3.ticks for x-axis tick values and computed positions for y-axis labels, rather than using d3.axisBottom or d3.axisLeft.