Defining a global filter/transformer in Polymer.dart

Question

Is there a way to define a global transformer that will be available in all custom elements?

Answer 1

I'm not aware of a global way to define a transformer, but I use the following workaround: I have a class containing my global transformers, that are included into my custom elements using a mixin. Put it into a library that you include into every element. My global transformer mixin:

abstract class GlobalTransformersMixin extends Object implements Observable {
  @observable
  final Transformer asInteger = new _StringToInt();
  //...
}

Using it in an custom element:

@CustomTag('my-elment')
class MyElement extends PolymerElement with GlobalTransformersMixin {
    //...
}