typeError: Failed to execute 'contains' on 'Node': parameter 1 is not of type 'Node Polymer

Question

I am trying to implement context menu using polymer paper menu. Whenever I remove node from dom. polymer is throwing error like this

typeError: Failed to execute 'contains' on 'Node': parameter 1 is not of type 'Node'

and I get the following error message:

What shall I do?

Solution

I had the same issue. This is due to polymer-mini.html checks if the arg passed to document.documentElement.contains(node) is node type. Debugging i could see that an event propagated so the last iteration was window object causing this issue. My solution was adding ev.stopPropagation() to the code before removing action.