Using v2018.1.3 of IntelliJ, I show how you can run and debug a web app using Dart 2, the new Dart Build System, and the Dart dev compiler.
To get this to work, you need at least Dart 2.0.0-dev.50 installed.
You also need to configure your project to have pkg:build_runner and pkg:build_web_compilers
To learn more about the new web workflow, see https://webdev.dartlang.org/dart-2
See https://github.com/dart-lang/sample-p... for a quick example to test it out!
This is feature set is now available in 2018.1.3 versions of WebStorm and IntelliJ