That's because the page isn't scrolling. An internal element of 
core-header-panel is. Current versions of core-header-panel include a 
scroller 
<http://www.polymer-project.org/docs/elements/core-elements.html#core-header-panel>
 
property that gives you access to the element on which you can get the 
correct scrollTop. Looks 
like http://www.polymer-project.org/apps/polymer-tutorial/finished/ is 
using an old one, so it doesn't have that.

Em segunda-feira, 8 de setembro de 2014 11h32min38s UTC-6, Sid Kat escreveu:
>
> It seems that you cannot get the scroll state of a page like that from the 
> tutorial http://www.polymer-project.org/apps/polymer-tutorial/finished/.
> I've encountered the same issue with a similar page where most of the 
> content goes into one custom polymer element.
> Scrolling up and down does not change document.body.scrollTop or 
> window.scrollY (or whatever), they are always 0.
> And button events on such pages do not distinguish between pageY, clientY, 
> screenY and y.
>

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