A bar chart displays product sales data loaded from a remote CSV file via `d3.csv`. The visualization uses `d3.scaleBand` and `d3.scaleLinear` to map product categories and sales values, rendering steelblue rectangles in an SVG. Axes are generated with `d3.axisBottom` and `d3.axisLeft`, while the chart updates through D3’s data join pattern using `selectAll` and `enter`. The static SVG output is styled with a minimal CSS rule for message text.