Don't collapse and expand, just only changing state (+) and (-)

GoJS
1

Hi…please help me…
i want to use button TreeExpanderButton when i click it … it don’t collapse and expand, just only changing state (+) and (-)

2

I’m sorry, but I do not understand the situation that you have.

I suppose if a node did not have any tree children, expanding and collapsing that node would not have any effect. However, it is normally the case that a “TreeExpanderButton” would not be visible on a “leaf” node – a node that has no tree children. So I cannot explain your situation.