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TreeListExpandChangeEvent

Updated on Oct 31, 2025

Represents the object of the onExpandChange TreeList event.

Name	Type	Description
component?	`any`
dataItem	`any`	The data item which is expanded or collapsed.
event	`any`
level	`number[]`	An array of indexes of each parent and current item in the data tree.
value	`boolean`	The available values are: `true`—If the data item is expanded. `false`—If the data item is collapsed.