TreeViewExpandChangeEvent
Represents the object of the onExpandChange event (see example).
item
any
The item that is expanded or collapsed.
itemHierarchicalIndex
string
The hierarchical index of the item. The indices are zero-based. The first root item has a 0 (zero) index. If the first root item has children, the first child acquires a 0_0 index and the second acquires a 0_1 index.
nativeEvent
any
A native DOM event.
syntheticEvent
SyntheticEvent<any>
A React Synthetic Event.
target
An event target.
