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ExpandEvent

Arguments for the TreeList expand and collapse events.

dataItem

any

The expanded/collapsed data item.

sender

TreeListComponent

The TreeList component that triggered the event.

Methods

isDefaultPrevented

Returns true if the event was prevented by any of its subscribers.

Returns

boolean

true if the default action was prevented. Otherwise, returns false.

preventDefault

Prevents the default action for a specified event. In this way, the source component suppresses the built-in behavior that follows the event.