Making a bar chart
This example shows a horizontal bar chart ranking the ten most populous countries, with population values converted to billions and labeled accordingly. It uses D3 v6’s `csv` loader to parse the data, `scaleLinear` and `scaleBand` for positioning, and `axisLeft` with `axisBottom` for the axes. The SVG rendering includes a custom tick formatter that replaces “G” with “B,” gridlines via negative tick sizes, and styled text for the title and axis labels.