Text.isElementContentWhitespace is no longer part of the DOM standard.
WebKit does not support this attribute. I filed a bug on Opera for removing it there (along with replaceWholeText()).
Created attachment 560927 [details] [diff] [review]
Comment on attachment 560927 [details] [diff] [review]
Hrm.. this actually seemed like a useful function. It always feels silly to me when all browsers have to have state or functionality internally that isn't exposed to the webpage.
So I'd be in favor of keeping this in spec/implementations. But if people prefer to remove it then I won't stand in the way.
The current name does not make any sense. I would be open to renaming it. E.g. Text.isWhiteSpace. I used an uppercase S for consistency with white-space in CSS.
I'd be fine with that.
I filed http://www.w3.org/Bugs/Public/show_bug.cgi?id=14443 on adding Text.isWhiteSpace to DOM4, but Simon rightly asks what the use case is and I have no idea.
Oops, wrong bug (sorry for the spam).
This time, I updated: