This zoomable sunburst from Mike Bostock’s example, ported to D3 v5 by tdog8901, visualizes hierarchical data using an interactive radial layout with SVG and animated transitions. Clicking a node zooms into that subtree, smoothly re-scaling arcs via `transition.attrTween` and interpolated path data. The code uses `d3.hierarchy`, `d3.partition`, and `d3.arc` to render the rings, with a color scale based on top-level names. It loads data from a custom `flare.json` file and includes labels that fade in or out based on visibility thresholds.