Marcin/Rafeal: This is really cool! I hadn't realized you could take
advantage of Polymer bindings outside of a custom element definition, and
it opens up some intriguing new possibilities. It'd be nice if HTML
designers could learn and use just enough binding syntax in a document's
markup to be able to wire together custom elements.
I was wondering if it's currently possible to do this entirely in markup.
If all someone's interested in doing is just binding together two
properties on two different elements, it'd be nice to be able to specify
that an empty object (that is, { } ) should be used as the model without
requiring script:
<template id="tmpl" bind model>
<x-element value="{{foo}}"></x-element>
<y-element value="{{foo}}"</y-element>
</template>
Is something like this already possible today?
On Tuesday, January 28, 2014 4:26:30 AM UTC-8, Rafael Weinstein wrote:
>
> PolymerExpressions is enabling named scopes. This is setup for you
> automatically within Polymer elements. In the main document, you'll need to
> set it up yourself. Something like:
>
> http://jsfiddle.net/E63ut/
>
>
> On Tue, Jan 28, 2014 at 3:27 AM, Marcin Warpechowski
> <[email protected]<javascript:>
> > wrote:
>
>> 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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>
>
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