We cannot determine from the documentation, the example or our own efforts what exactly triggers the event reactOnToggle in a Client Tree. Can anyone tell us how this event gets triggered?
In the CLIENTTREE control, the reactOnToggle is only triggered when the subnodes are not loaded. If the subnodes for a node are already loaded, no reactOnToggle is triggered.
The CLIENTTREE (as the name states) runs mainly in the client. Also for very big trees you might run into performance problems with CLIENTTREE.
If you would like to get a reactOnToggle on server-side everytime: Please use the server-side tree control (TREENODE3). This is also recommended for very big trees.