This example visualizes stacked bar charts comparing yes and no votes across Colorado counties, with tooltips revealing exact vote counts per county. The chart supports zooming and panning through D3’s zoom behavior, while bars are rendered as SVG rectangles. Vote data comes from a CSV file, and county boundaries are loaded from a GeoJSON file. The visualization uses D3 v4 scales such as `scaleBand` and `scaleLinear`, with `d3.json` and `d3.csv` for data loading.