During the reproduction of this example, something strange happend: https://github.com/dart-lang/dart_by_example/tree/master/example/angular/basics/conditionally_switch_between_dom_elements
So created a plain Dart project in WebStorm, added angular.dart, copied the example. Everything works well, if the files are "web" directory.
BUT, after I moved the three files into a switch subdirectory, I have the following problem: An error occurred loading file: package:angular/angular.dart
Do you have any idea? What did I missed.