Dartlang: Using enums in Angular2 templates

We're working on bringing formal support, but you can always add a getter for now:

enum MyEnum {
  stateA,
  stateB,
}

class MyComponent {
  MyEnum get stateA => MyEnum.stateA;
}

Use the exports property of your Component class. Copied from here in the AngularDart Guide.

enum MyEnum { foo, bar, baz }

@Component(
  selector: 'example',
  exports: const [MyEnum],
  template: '<p>{{MyEnum.bar}}</p>',
)
class Example {}