This interactive zoomable sunburst diagram uses the D3 v5 library to display a hierarchical dataset. The code loads data from the Observable `flare` dataset and renders the visualization using SVG elements. Clicking on any arc transitions the view to that node, with a smooth animated zoom effect, by recomputing angular and radial portions via `d3.interpolate` and `transition.attrTween`. The visualization applies a rainbow color scale and includes text labels with conditional visibility.