Can you elaborate on when the tag's parentNode is not going to have a hasAttribute method? Want to understand the usecase better before pulling it in.

@gkatsev I am using the <template> element which creates a DocumentFragment to encompass a video player.

I am specifically creating a Polymer component that extends the video element. When I use the ready lifecycle callback the local DOM has been initialized but not attached to the document. This means that the DocumentFragment is the parent. Using the attached lifecycle callback, does not hit this case since it has been attached and the parent is then a DOM element. However, the attached callback runs each time the element is attached. I was concerned there may be issues with videojs attempting to initialize the element multiple times. Thus I chose to use the ready callback which will only be called once.

Hope this clarifies things!

REFRENCES:

• template
• DocumentFragment

Ah, yup, makes sense! Thanks.