This example shows an interactive bar chart of coffee sales data, displaying counts for different categories with clickable bars that highlight selections. Built with React hooks and D3.js, it uses `scaleBand` and `scaleLinear` for positioning, `axisBottom` and `axisLeft` for axes, and loads CSV data via `d3.csvParse` from a remote URL. A `ResizeObserver` tracks container dimensions to make the visualization responsive.