D3 Barchart
This example shows a horizontal bar chart comparing population values for six countries (A–F), with bars rendered as SVG rectangles and axes labeled accordingly. The chart loads data from a CSV file, converts population strings to numbers, and uses `d3.scaleLinear` for the x-axis and `d3.scaleBand` with padding for the y-axis. The code builds the visualization by appending a group, calling `d3.axisLeft` and `d3.axisBottom` for the axes, and binding the data to rectangles with the D3 data-join pattern. All styling comes from a stylesheet setting bars to steelblue.