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!
Follow Polymer on Google+: plus.google.com/107187849809354688692
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