An animation that illustrates a class exercise for the d3-unconf (denjn5.github.io/unconf/hierarchy.html). Specifically, we'll be talking about using tabular data instead of hierarchical data as the input for our hierachical visualizations. It makes life easier.
From https://bl.ocks.org/denjn5/c27756b9fdadfa1a6490578331596906
https://d3js.org/d3.v4.min.js