<!DOCTYPE html>
<html lang="en" ng-app="animationDemo">
<head>
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <!-- Angular Material style sheet -->
  <link rel="stylesheet" href="//ajax.googleapis.com/ajax/libs/angular_material/1.1.1/angular-material.min.css">
</head>
<body  ng-cloak>

  <div ng-controller="DemoCtrl">
    <md-button class="md-raised md-warn" ng-click="showDialog($event)">show modal</md-button>  
  </div>
  
  <!-- Angular Material requires Angular.js Libraries -->
  <script src="//ajax.googleapis.com/ajax/libs/angularjs/1.5.11/angular.min.js"></script>
  <script src="//ajax.googleapis.com/ajax/libs/angularjs/1.5.11/angular-animate.min.js"></script>
  <script src="//ajax.googleapis.com/ajax/libs/angularjs/1.5.11/angular-aria.min.js"></script>
  <script src="//ajax.googleapis.com/ajax/libs/angularjs/1.5.11/angular-messages.min.js"></script>
  <script src="script.js"></script>

  <!-- Angular Material Library -->
  <script src="//ajax.googleapis.com/ajax/libs/angular_material/1.1.1/angular-material.min.js"></script>
  
  
</body>
</html>

angular
  .module('animationDemo', ['ngMaterial', 'ngMessages'])
  .controller('DemoCtrl', function($scope, $mdDialog) {
    $scope.showDialog = () => {

      const alert = $mdDialog.alert({
        title: 'Attention',
        textContent: 'The backdrop animation is NOT working.',
        ok: 'Close'
      });

      $mdDialog.show(alert);

    };

  })