On Sat, Nov 21, 2015 at 3:30 PM Darin Hensley <[email protected]>
wrote:
> var toolbar = Polymer.dom(document).querySelector('#main-toolbar'
>
> -------------------------
>
> var toolbar = document.querySelector('#main-toolbar');
>
> --------------------------
>
> <paper-toolbar id="main-toolbar">
>
>
> 1) why does `document.querySelector` work on `paper-toolbar` when it's a
> shadow dom element? or another way to put it... why does it work on a
> element that is in local dom?
>
Shady DOM doesn't offer proper scoping of DOM like native Shadow DOM does.
It's a limitation of the polyfill. The full web components polyfill did.
> 2) since both of these `querySelector` work, which is better to use?
>
If you're outside of a Polymer element in the main document, use
document.querySelector('#main-toolbar');. The only time you need the
Polymer.dom() APIs is if you're in an element.
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