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<!DOCTYPE html>
<html>
<head>
<script src="https://code.jquery.com/jquery.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css" rel="stylesheet" type="text/css" />
<script src="https://rawgit.com/angular/bower-angular/master/angular.min.js"></script>
  <script src="https://rawgit.com/angular/bower-angular-animate/master/angular-animate.js"></script>
  <meta charset="utf-8">
  <title>JS Bin</title>
</head>
<body ng-app="myApp">
  <div ng-controller="MyCtrl">
    <div class="form-group col-lg-12 col-sm-12 col-md-12 col-xs-12">
    <input class="form-control"type="text" ng-model="firstName" ng-change="toggleShow($modelValue)"placeholder="Enter Character to Show Label" />
  </div>
  <div class="animate-show" ng-show="ShowLabel">The hidden label text, should fade </div>
  </div>
</body>
</html>
 
.animate-show {
  line-height: 20px;
  opacity: 1;
  padding: 10px;
}
​
.animate-show.ng-hide-add, .animate-show.ng-hide-remove {
  transition: all linear 0.5s;
}
​
.animate-show.ng-hide {
  line-height: 0;
  opacity: 0;
  padding: 0 10px;
}
​
.check-element {
  padding: 10px;
  border: 1px solid black;
  background: white;
}
 
angular.module('myApp', ['ngAnimate'])
 .controller('MyCtrl', ['$scope', function ($scope) {
   $scope.firstName = '';
   $scope.ShowLabel = false;
   $scope.toggleShow = function () {
     $scope.ShowLabel = $scope.firstName.length > 0 ? true : false;
   };
 }]);
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