web-sys types should probably impl Deref to types they're inheriting

[upsuper]

Currently, for example if you have an Element, but you want to use first_child from Node, you have to either e.into::<Node>().first_child() or (e.as_ref() as &Node).first_child(). If would be great if one can just use e.first_child() without explicit type conversion.

Types defined in WebIDL can only have single inheritance, so I think this is doable via Deref chain.

[afdw]

Check rustwasm/rfcs#3.

[upsuper]

Thanks for the pointer. It seems that the conversion there leans towards having Deref as well. Closing this issue for now.

[upsuper]

Maybe we can keep this open until the proposed change in rustwasm/rfcs#3 is actually implemented?

[alexcrichton]

Ah I'm gonna close this in favor of the RFC. If we decide to merge that then we can have a tracking issue here to implement that, but until that happens all discussion should be on the RFC!