Only vaguely. I've looked over the site a few times, but never used it myself. I've hard good things about it from other Dart teammates who've looked closer. A

Only vaguely. I've looked over the site a few times, but never used it myself. I've hard good things about it from other Dart teammates who've looked closer. At first glance it looks like the Element API matches JS (probably generated from IDL), so it's not improved like dart:html. For instance Element.children returns an HTMLCollection which is not an Array and doesn't have the [] operator.