ES6 Class-based Angular 1.x ngError Directive: could be more "ES6-y", but you get the gist 😉

ng-error.directive.js

class ngError {

  constructor($parse) {
    this.$parse = $parse;
    this.restrict = 'A';
  }

  link(scope, $element, attrs) {
    var onError = this.$parse(attrs['ngError']);

    $element.on('error', function(event) {
      scope.$apply(function() {
        onError(scope, { $event: event });
      });
    });
  }

  static createInstance ($parse) {
    return new ngError($parse);
  }
}

ngError.createInstance.$inject = ['$parse'];

export default ngError;