I am a bit confused about the launch is supposed to work. In my project I have a build.dart and a html file.
What I am doing now is run the build.dart and then run the html.
Building the dart and then refresh the browser window works also.
But I see no option to run the build.dart and then automatic refresh dartium?
My favorite method is to click on the index.html in the out directory and hit Command-r (or whatever is equivalent on your OS) to run it. This will run build.dart as well as open Dartium.