Add NonDocumentTypeChildNode

[japgolly]

No description provided.

[japgolly]

Don't merge yet, this doesn't work properly.

Using this, I get:

Uncaught TypeError: Cannot read property 'previousElementSibling' of null

So... null and undefined aren't the same in Scala.JS?

[sjrd]

No, null is null and undefined is () (unit). Imagine how much of everything would make no sense whatsoever if two values that are different in js were "the same" in Scala.js ... I can't even fathom the situation.

[lihaoyi]

Imagine how much of everything would make no sense whatsoever

lol that's just every day in Javascript land...

// Is foo undefined? null? An empty string? 0? who knows!
if (foo){
  ...
}

[japgolly]

Hehe. Well let's put it down to misremembering and wishful thinking :)

Corrected. Should be good to go now.

[sjrd]

LGTM

lol that's just every day in Javascript land...

No no. Your snippet still makes sense. Here we're talking about an entirely different kind of nonsense. The kind which truly has no sense. As opposed to some sense, even if unintuitive and possibly difficult to reason about.