Re: [w3c/webcomponents] How can a custom element detect when it is transcluded into a shadow tree (slotchange)? (#504)

If I understand you correctly [this jsbin](http://jsbin.com/xexena/1) should work just fine. Just swap v0 for v1 API calls and Bob's your uncle. A child shouldn't need to know where it's slotted; in a composed tree, a child is always slotted into a `<slot>` or is a light DOM child of another node. In the case where it's composed `parentNode` is a `<slot>` then it will always report that its parent is the shadow host, thus the `attachedCallback() / connectedCallback()` should be sufficient.

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