New forms based pubspec.yaml file editor! To see it, right click on a pubspec file and choose "Open with Pubspec Editor".
New Class Hierarchy view.
New Clean-up to add and remove local variables type annotations.
Launches in non-Dartium browsers are now faster (we only invoke dart2js if the source has changed).
If a build.dart script indicates to the Editor that it has remapped a file (foo.html ==> out/foo.html), and the user launches that file, we'll launch the generated file instead. For things like web_ui applications, this means fewer clicks for users and a simpler workflow.
Added a preference to control automatically running Pub.
Breaking Change List:
All dart:html class names have been updated to follow the Dart naming guidelines. For example CSSStyleDeclaration is now CssStyleDeclaration.
All indexed DB types (IDB*) have been moved to dart:indexed_db and had their prefix removed. For example, IDBTransaction is now Transaction (with the exception of IDBFactory which is IdbFactory).
DOMApplicationCache and DOMFileSystem are now ApplicationCache and FileSystem
And as always, view the changelog for the full list of changes, and to get started with the Editor see our tutorial.