Chapter 5: Working with AngularJS forms

HTML

<script src="https://code.angularjs.org/1.3.2/angular.min.js"></script>
<div ng-app="myApp">
  <div ng-controller="Ctrl">
    <form novalidate name="myform">
      <input name="myinput" ng-model="formdata.myinput" />
    </form>
    <div ng-show="isPristine">
      Enter a value
    </div>
  </div>
</div>

JavaScript

angular.module('myApp', [])
  .controller('Ctrl', function($scope) {
    $scope.$watch('myform.myinput.$pristine', function(newval) {
      $scope.isPristine = newval;
    });
  });