Mike Bostock's [D3 Zoomable Sunburst example] (https://beta.observablehq.com/@mbostock/d3-zoomable-sunburst)

• with D3 v5 (based on the [changes in v5]
• (https://github.com/d3/d3/blob/master/CHANGES.md#changes-in-d3-50))

Ported from [this Observable notebook] (https://beta.observablehq.com/@tasqon/d3-circle-packing) for this forum thread. Many thanks to Bryan Gingechen who answered my question about the necessary steps to get from an (Observable) JavaScript notebook to a vanilla JavaScript index.html. He presented his solution on blockbuilder.org