interactive - if set to false, interaction with elements and links is disabled. If it is a function, it will be called with the cell view in action and the name of the method it is evaluated in ('pointerdown', 'pointermove', ...). If the returned value of such a function is false interaction will be disabled for the action. For links, there are special properties of the interaction object that are useful to disable the default behaviour. These properties are: vertexAdd, vertexMove, vertexRemove and arrowheadMove. By setting any of these properties to false, you can disable the related default action on links.