Sorry, I swapped the links to the "item in items" JSFiddles. Correct links:

body (does not work): 
http://jsfiddle.net/warpech/u59pk/3/<http://www.google.com/url?q=http%3A%2F%2Fjsfiddle.net%2Fwarpech%2Fu59pk%2F3%2F&sa=D&sntz=1&usg=AFQjCNHW06fKIBg91VyfiiAZVA9yjkCTVw>
 

 

Polymer Element (works): 
http://jsfiddle.net/warpech/u59pk/6/<http://www.google.com/url?q=http%3A%2F%2Fjsfiddle.net%2Fwarpech%2Fu59pk%2F6%2F&sa=D&sntz=1&usg=AFQjCNEvfrDQQx_J9alE0AOU4wttqAISYg>
 




On Tuesday, January 28, 2014 12:22:30 PM UTC+1, Marcin Warpechowski wrote:
>
> The following syntax:
>
> <template repeat="{{items}}">
>
>
> works both in Polymer Elements and in the main document body (see how it 
> works: http://jsfiddle.net/warpech/u59pk/2/ )
>
> However, the following syntax ("named scope"):
>
> <template repeat="{{item in items}}">
>
>
> works only within a Polymer Element template (Polymer Element: 
> http://jsfiddle.net/warpech/u59pk/3/ , body: 
> http://jsfiddle.net/warpech/u59pk/6/ )
>
> I assume this is because the expression "item in items" is only parsed by 
> Polymer Expressions, but it took me some time to investigate.
>
> I have few questions:
> 1. Is the "item in items" parsing done by 
> https://github.com/Polymer/polymer-expressions/blob/master/third_party/esprima/esprima.js?
>  I suppose so
> 2. I there a way to make this expression parse outside of a 
> <polymer-element>? I see a big benefit from using named scopes in my 
> templates but I prefer not to wrap my whole app in a <polymer-element>
> 3. Template Binding page suggests "item in items" would be available in 
> <template>, also outside <polymer-element> ( 
> http://www.polymer-project.org/platform/template.html ). And I would love 
> it to be so. However, on a page where Polymer Expressions ( 
> http://www.polymer-project.org/platform/template.html ) are described, it 
> is more clear that it only runs within <polymer-element>. Perhaps some 
> clarification should be added there.
>
> Thanks for your great work!
>

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