Writing a helper that produces bound results?

Question

I have a date/time formatting helper but what it produces does not update when the underlying property changes. This is not a surprise, but does anyone know how to produce

Answer 1

Not sure if this applies to this particular question, but I also created helpers in views and wanted the values to update when data in the Ember.js view changed. The way I solved this problem was to write an observer on the values I wanted changed and used jQuery to update the specific value.

For example (in Coffeescript):

...

attrObserver: Ember.observer(() ->
  $("#attrId").text(this.get("attr"))

...