I have a custom element which itself hosts a custom element.
<polymer-element name="flex-nonvisual">
<template>
<polymer-flex-layout></polymer-flex-layout>
</template>
</polymer-element>
Now in attached() (or some other callback) of PolymerFlexLayout I want to set the class attribute of the flex-nonvisual element.
In Javascript the code looks like this.parentNode.host.classList.add('someclass');
In Dart in attached() (after the call to super.attached()) this.parent is null and I couldn't find any other reference to the host element.
How can I do this in Dart?
update: Polymer >=1.0.x
shady DOM
new PolymerDom(this).parentNode;
or
domHost
short for
Polymer.dom(this).getOwnerRoot().host
full shadow DOM
(this.parentNode as ShadowRoot).host
@ChristopheHerreman and @MattB are still right about encapsulation should not be broken.
But also JS Polymer elements access the parent in their layout elements because it's still convenient in some scenarios.
This works now in PolymerDart too.
Polymer.dart <= 0.16.x
(this.parentNode as ShadowRoot).host
Collected from the Internet
Please contact [email protected] to delete if infringement.
Comments