Give Zeppelin interpreter results to arbitrary JS

cell1.html

%angular
<div id='testDiv'>
</div>
<script>
var el = angular.element($('#testDiv').parent('.ng-scope'));
angular.element(el).ready(function() {
  window.locationWatcher = el.scope().compiledScope.$watch('dummy', function(newValue, oldValue) {
      $('#testDiv').append(newValue);
  });
});
</script>

cell2.scala

val test = "abc"
z.angularBind("dummy", test)