This example implements a circle-packing visualization using D3 v5, displaying a hierarchical dataset from the Flare library. The diagram shows a nested arrangement of circles, where each circle represents a data node, with its size proportional to a value and color indicating depth in the hierarchy. Built with D3’s `d3.stratify` and `d3.pack` APIs, it renders to SVG, applying a sequential magma color scale. Interactive mouseover highlights ancestor nodes, while leaf labels are clipped via `clipPath`, and tooltips show the node ID and value.