Find element parent by selector

[Dakror]

Currently there are selection methods to find children by selector but not recursive parents, so I added one.

Since the methods for query selector parsing are implementation-private, I couldnt actually do this in my own project, so why not create a PR. (exposing those functions could be another nice addition)

[mikke89]

Thanks for the PR! I was wondering how useful this is, especially since I couldn't even find it on the HTML DOM. But then I found there is indeed one, but it's called Element.closest().

I say we stick to the HTML terminology and call it Element::Closest, however bad that is :P

Also, we might as well support multiple selectors, it shouldn't be much slower as we have already created the nodes. I also suggest we add a performance warning like in the QuerySelector functions, and rename the description such that parent -> ancestor.

Thanks again, it's always nice to see more contributions!

[Dakror]

To be honest i was just so used to this function in jQuery :D

[mikke89]

Awesome, thank you!