For RadComboBox, what JS events fire after SelectedIndexChanged? If you select something, and the menu closes, does the DropDownClosed event fire after this?
I tried the scenario in my end and found that OnClientDropDownClosing and OnClientDropDownClosed events fires after SelectionIndexchanged event. Here is my observation.
OnClientSelectedIndexChanging
OnClientSelectedIndexChanged
OnSelectedIndexChanged (server event)
OnClientDropDownClosing
OnClientDropDownClosed
Go through the following link to know more about client events of RadComboBox. Hope this helps. Client-Side Events