<my-element my-attribute="false" />

myApp.directive('myElement', function ($window) {
  return {
    restrict:'E',
    transclude: true,
    scope: {
      myAttribute: '='
    },
    controller: function($scope) {

    },
    template: '<div>Hello <span ng-if="myAttribute == true">, World</span></div>'
  };
});