AngularJS Validation Examples

First Page
<!DOCTYPE html>
<html>
   <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js">
   </script>  
   <body>
      <h2>AngularJS Validation Example</h2>
      <form ng-app="myApp" ng-controller="validateCtrl" 
         name="myForm" novalidate>
         <p>Username:<br>
            <input type="text" name="user" ng-model="user" required>
            <span style="color:red" ng-show="myForm.user.$dirty && myForm.user.$invalid">
               <span ng-show="myForm.user.$error.required">Username is required.
                  </span>
            </span>
         </p>
         <p>Email:<br>
            <input type="email" name="email" ng-model="email" required>
            <span style="color:red" ng-show="myForm.email.$dirty && myForm.email.$invalid">
               <span ng-show="myForm.email.$error.required">Email is required.
                 </span>
              <span ng-show="myForm.email.$error.email">Invalid email address.</span>
            </span>
         </p>
         <p>
            <input type="submit"
            ng-disabled="myForm.user.$dirty && myForm.user.$invalid ||  
            myForm.email.$dirty && myForm.email.$invalid">
         </p>
      </form>
      <script>
         var app = angular.module('myApp', []);
         app.controller('validateCtrl', function($scope) {
            $scope.user = 'John Abraham';
            $scope.email = 'Abraham.John@gmail.com';
         });
      </script>
   </body>
</html>
Output

First Page