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

app.controller('MainCtrl', function($scope) {
  $scope.name = 'World';
  
  $scope.LoginValidator = function ($event) {
    $event.preventDefault();
    if($scope.LoginForm.$valid){
      console.log("valid");
    }else{
      console.log("invalid");
      console.log($scope.LoginForm.$error.require);
      if($scope.LoginForm.Email.$invalid){
        $scope.mailRequire = true;
      }
      if($scope.LoginForm.password.$invalid){
        $scope.passRequire = true;
      }
    }
    };
});
<!DOCTYPE html>
<html ng-app="plunker">

  <head>
    <meta charset="utf-8" />
    <title>AngularJS Plunker</title>
    <script>document.write('<base href="' + document.location + '" />');</script>
    <link rel="stylesheet" href="style.css" />
    <script data-require="angular.js@1.5.x" src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.5.11/angular.min.js" data-semver="1.5.11"></script>
    <script src="app.js"></script>
  </head>

  <body ng-controller="MainCtrl">
    <p>Hello {{name}}!</p>
    
    <form id="login-form" name="LoginForm" action="/home" method="get" class="loginform" role="form" novalidate ng-submit="LoginValidator($event)">
{{LoginForm.$submitted | json}}
                        <input type="email" name="Email" id="email" tabindex="1" ng-model="login.email" ng-pattern="/^[^\s@]+@[^\s@]+\.[^\s@]{2,}$/" placeholder="Email" ng-required="true">
                        <span style="color:red; display:block; text-align:center;" ng-show="LoginForm.Email.$dirty && LoginForm.Email.$error.pattern">* Please Enter Valid Email</span>
                        <span style="color:red; display:block; text-align:center;" ng-show="mailRequire">* Email required</span>

                        <input type="password" name="password" ng-minlength="8" id="password" tabindex="2" ng-model="login.password" placeholder="Password" ng-required="true">
                        <div ng-show="LoginForm.password.$dirty && LoginForm.password.$invalid"><small style="color:red; display:block; text-align:center;">* Invalid Password</small></div>
                        <input type="submit" value="LOG IN" />
                </form>
  </body>

</html>
/* Put your css in here */