How to add custom data in Rollup

Community Help
1

I have data for popups, but when I use rollup, i dont know how to add this data. Is it possible?

const rollup = d3.rollup(
  chartData,
  data => d3.sum(data, d => d.value),
  d => d.root,
  d => d.category,
  d => d.subcategory
)
2

For example, I try to add group index:

const rollup = d3.rollup(
  chartData,
  data => d3.sum(data, d => d.value),
  d => d.root,
  d => d.category,
  d => d.subcategory
)

const pack = d3.pack().size([width, height])
const hierarchy = d3.hierarchy(rollup).sum(([_, value]: any) => value).sort(a, b) => b.value - a.value)
const nodes = pack(getIndexed(hierarchy))
const root = nodes.descendants()

With this func:

function getIndexed(node, index = 0) {
  return node?.children
    ? Object.assign(node.copy(), { children: node.children.map(d, i) => getIndexed(d, i)), index })
    : Object.assign(node.copy(), { index })
}

But result hierarchy don’t have parent, x, y and r parameters…

3

Does this example help?