ui select need to focus invalid

README.md

useage

import UiSelectContainer   from './services/ui_select_container';

angular.module('app', [UiSelectContainer.name])

ui-select-container.js

import angular from 'angular';

export default angular.module('services.uiSelectContainer', [])
.directive('uiSelectContainer', function () {

  return {
    priority: -1,
    restrict: 'C',
    require: 'ngModel',
    link ($scope, $element, $attrs) {
      let $input = $element.find('input').eq(1);
      let requiredFunc = () => {};
      let ngModel = $attrs.ngModel;
      if ($input.hasClass('ui-select-offscreen')) {
        requiredFunc = () => {
          let isRequired = $scope.$eval($attrs.ngRequired) || false;
          if (('' === $scope.$eval(ngModel) || undefined === $scope.$eval(ngModel)) && isRequired) {
            $input.attr('required', isRequired);
          }
          else {
            $input.removeAttr('required');
          }
        };
        $attrs.$observe('required', () => {
          requiredFunc();
        });
        $scope.$watch(ngModel, () => {
          requiredFunc();
        });
      }

    }
  };

});