Events

const off = chart.on('nodeClick', ({ id, item }) => {
  console.log(id, item)
})
// later
off()

Event	Payload	When
ready	—	The first frame has been drawn.
nodeClick	{ id, item }	A tap on a node. Not fired for a tap that lands on a card's own button or input.
nodeDblClick	{ id, item }	Two taps on the same node inside 300ms. The second does not also emit nodeClick.
nodeHover	{ id, item } or { id: null, item: null }	Enter and leave. Not re-fired for repeated moves within the same node.
toggle	{ id, open }	A node was expanded or collapsed, however it happened.
viewportChange	{ camera }	Any camera change — pan, zoom, ease, kinetic coast. Fires per frame while one is running.
warning	Warning	Something in the data could not be honoured.

Warnings are not errors

Bad data draws. A parentId naming nothing, a duplicate id, a cycle — each one is resolved in a defined way and reported rather than thrown:

chart.on('warning', (warning) => {
  console.warn(warning.code, warning.message, warning.id)
})

An org chart is usually built from data somebody else owns, and refusing to render because one row of ten thousand points at a deleted manager is not useful behaviour. The chart shows you the other 9,999 and tells you about the one.

Warnings from the initial load are emitted after construction returns, so a listener attached on the next line still hears them.