This example shows a bar chart of sales revenue per product from January through May 2024. It uses D3 v6 with SVG rendering, loading CSV data from a GitHub gist and aggregating it with `d3.rollup` to sum revenues by product. Horizontal bars are drawn as `rect` elements with a steelblue fill that turns orange on hover, using `d3.scaleBand` for the y-axis and `d3.scaleLinear` for the x-axis. Axes are generated with `d3.axisLeft` and `d3.axisBottom`.