This example presents a zoomable sunburst visualization of hierarchical data, where each ring segment represents a category and its size corresponds to a numerical value. Built with D3 v5, it uses the `d3.partition` layout to compute the angular and radial coordinates for the hierarchical structure. The visualization is rendered as SVG, with a click interaction on each arc that triggers a smooth animated zoom via `d3.transition` and `attrTween`. Node labels rotate to align with their segments. The example is an updated version of Mike Bostock's original, ported from Observable, and uses the `flare.csv` and `flare.json` datasets.