Add readyState function for a Document

[dgendill]

Do you think it would make sense to add a readyState function for a Document? e.g.

data DocumentReadyState
  = Loading
  | Interactive
  | Complete

readyState :: forall e. Document -> Eff (dom :: DOM | e) DocumentReadyState

https://www.w3.org/TR/html51/dom.html#the-document-object
https://developer.mozilla.org/en-US/docs/Web/API/Document/readyState

If so, I can probably take a look at doing it, but I'm not exactly sure where I should put the function and sum type. Would DOM.Node.Document be appropriate?

[garyb]

This would indeed be good to have! It should go under DOM.HTML.Document by the looks of it though, as it's in the HTML5 spec rather than the DOM4 spec: https://www.w3.org/TR/html5/dom.html#dom-document-readystate