I created an iron-list that has a paper-ripple, with a tap event handler, 
on each child list element. On desktop browsers the scroll action and tap 
actions are distinct so I can scroll the list without causing ripples and 
tap events on list items.  On touch devices I cannot scroll the list 
without also triggering ripple animations and tap events on the list items 
at the point where the scroll gesture starts on the iron-list. 

The tap event on the list element is undesirable when the touch was for the 
purpose of scrolling the list (i.e. was actually a swipe).

I don't have much experience with these sort of issues and I'm not sure if 
this something that needs to be improved in Polymer or if this is something 
that I sort out in my own application. Anyone have any thoughts?





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