AngularJS form validation directive for showing input errors

Question

I need to create a validation directive for showing all input errors for each input automatically. This validation directive should show all errors at current moment and list of

Answer 1

I want to suggest look at this post in this post author is explaining how to achieve your goals , and you can deeply dive into the code . link

example from this post showing error messages

module = angular.module('app', []);

module.directive('showErrors', function($timeout) {
    return {
      restrict: 'A',
      require: '^form',
      link: function (scope, el, attrs, formCtrl) {
        // find the text box element, which has the 'name' attribute
        var inputEl   = el[0].querySelector("[name]");
        // convert the native text box element to an angular element
        var inputNgEl = angular.element(inputEl);
        // get the name on the text box
        var inputName = inputNgEl.attr('name');

        // only apply the has-error class after the user leaves the text box
        var blurred = false;
        inputNgEl.bind('blur', function() {
          blurred = true;
          el.toggleClass('has-error', formCtrl[inputName].$invalid);
        });

        scope.$watch(function() {
          return formCtrl[inputName].$invalid
        }, function(invalid) {
          // we only want to toggle the has-error class after the blur
          // event or if the control becomes valid
          if (!blurred && invalid) { return }
          el.toggleClass('has-error', invalid);
        });

        scope.$on('show-errors-check-validity', function() {
          el.toggleClass('has-error', formCtrl[inputName].$invalid);
        });

        scope.$on('show-errors-reset', function() {
          $timeout(function() {
            el.removeClass('has-error');
          }, 0, false);
        });
      }
    }
  });

module.controller('NewUserController', function($scope) {
  $scope.save = function() {
    $scope.$broadcast('show-errors-check-validity');

    if ($scope.userForm.$valid) {
      alert('User saved');
      $scope.reset();
    }
  };

  $scope.reset = function() {
    $scope.$broadcast('show-errors-reset');
    $scope.user = { name: '', email: '' };
  }
});