This bar chart displays the population of the top 10 most populous countries, using data from the 2018 World Population Prospects estimate. Population values are formatted with a custom tick formatter that converts large numbers using `d3.format` with '.2s' notation. The chart employs `d3.scaleLinear` and `d3.scaleBand` to map population and country names, respectively. Customized axes remove the y-axis domain and x-axis domain lines, while x-axis gridlines extend across the plot. An axis label and title are added as SVG text elements.