How in angular 1 depending on scope can I add e-required attribute?

Question

How in angular 1 depending on scope can I add e-required attribute? Doesn't want to use ng-show

E.g. for $scope.disableStreetValidation = false;

 <strong class="test" e-required>.

And for: $scope.disableStreetValidation = true;

  <strong class="test">.

Answer 1

Following this solution, you should use this syntaks:

 <strong class="test" ng-attr-e-required="{{disableStreetValidation || undefined}}">