A stylized bar chart displays event counts over time, with bars rendered as alternating solid blocks and gaps. The visualization uses a React class component with mouse event handlers to enable rectangular region selection, drawing a semi-transparent overlay as users drag. Data comes from the provided `inData` array, which combines actual document counts with randomized values. The chart uses D3 v5 scales (`scaleBand`, `scaleLinear`) for positioning, while axes and marks are custom React components. Hovering over a bar highlights it in orange, and tooltips show formatted dates for each data point.