This example demonstrates a label-collision-avoidance algorithm for stacked bar charts, showing how text labels can be repositioned to prevent overlap when bars are small or near the chart’s border. The visualization uses three colored sets of rectangles—red for the initial random positions, orange for labels after bottom-alignment adjustments, and green for the final corrected positions after top-alignment passes. Built with D3 v4 and rendered as SVG, the code computes bounding boxes and shifts overlapping rectangles vertically in one or two passes. The data consists of eight randomly generated y-coordinates, sorted in descending order, with labels drawn at fixed width and height.