diff --git a/qr-scanner.js b/qr-scanner.js
index 6f3a309..29145ec 100644
--- a/qr-scanner.js
+++ b/qr-scanner.js
@@ -1,84 +1,88 @@
-if (require){
-  if (!angular) var angular = require('angular');
-  if (!qrcode) var qrcode = require('jsqrcode');
-}
-
 (function() {
-'use strict';
+    'use strict';
 
-angular.module('qrScanner', ["ng"]).directive('qrScanner', ['$interval', '$window', function($interval, $window) {
-  return {
-    restrict: 'E',
-    scope: {
-      ngSuccess: '&ngSuccess',
-      ngError: '&ngError',
-      ngVideoError: '&ngVideoError'
-    },
-    link: function(scope, element, attrs) {
-    
-      window.URL = window.URL || window.webkitURL || window.mozURL || window.msURL;
-      navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia;
-    
-      var height = attrs.height || 300;
-      var width = attrs.width || 250;
-    
-      var video = $window.document.createElement('video');
-      video.setAttribute('width', width);
-      video.setAttribute('height', height);
-      video.setAttribute('style', '-moz-transform:rotateY(-180deg);-webkit-transform:rotateY(-180deg);transform:rotateY(-180deg);');
-      var canvas = $window.document.createElement('canvas');
-      canvas.setAttribute('id', 'qr-canvas');
-      canvas.setAttribute('width', width);
-      canvas.setAttribute('height', height);
-      canvas.setAttribute('style', 'display:none;'); 
-    
-      angular.element(element).append(video);
-      angular.element(element).append(canvas);
-      var context = canvas.getContext('2d'); 
-      var stopScan;
-    
-      var scan = function() {
-        if ($window.localMediaStream) {
-          context.drawImage(video, 0, 0, 307,250);
-          try {
-            qrcode.decode();
-          } catch(e) {
-            scope.ngError({error: e});
-          }
-        }
-      }
+    angular.module('qrScanner', ["ng"]).directive('qrScanner', ['$interval', '$window', function($interval, $window) {
+        return {
+            restrict: 'E',
+            scope: {
+                ngSuccess: '&ngSuccess',
+                ngError: '&ngError',
+                ngVideoError: '&ngVideoError'
+            },
+            link: function(scope, element, attrs) {
 
-      var successCallback = function(stream) {
-        video.src = (window.URL && window.URL.createObjectURL(stream)) || stream;
-        $window.localMediaStream = stream;
+                window.URL = window.URL || window.webkitURL || window.mozURL || window.msURL;
+                navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia;
 
-        scope.video = video;
-        video.play();
-        stopScan = $interval(scan, 500);
-      }
+                var height = attrs.height || 300;
+                var width = attrs.width || 250;
 
-      // Call the getUserMedia method with our callback functions
-      if (navigator.getUserMedia) {
-        navigator.getUserMedia({video: true}, successCallback, function(e) {
-          scope.ngVideoError({error: e});
-        });
-      } else {
-        scope.ngVideoError({error: 'Native web camera streaming (getUserMedia) not supported in this browser.'});
-      }
+                var video = $window.document.createElement('video');
+                video.setAttribute('width', width);
+                video.setAttribute('height', height);
+                video.setAttribute('autoplay', true);
+                video.setAttribute('style', '-moz-transform:rotateY(-180deg);-webkit-transform:rotateY(-180deg);transform:rotateY(-180deg);');
 
-      qrcode.callback = function(data) {
-        scope.ngSuccess({data: data});
-      };
+                var canvas = $window.document.createElement('canvas');
+                canvas.setAttribute('id', 'qr-canvas');
+                canvas.setAttribute('width', width);
+                canvas.setAttribute('height', height);
+                canvas.setAttribute('style', 'display:none;');
 
-      element.bind('$destroy', function() {
-        if ($window.localMediaStream) {
-          $window.localMediaStream.stop();
-        }
-        if (stopScan) {
-          $interval.cancel(stopScan);
+                angular.element(element).append(video);
+                angular.element(element).append(canvas);
+                var context = canvas.getContext('2d');
+                var stopScan;
+
+                var scan = function() {
+                    if ($window.localMediaStream) {
+                        context.drawImage(video, 0, 0, 307,250);
+                        try {
+                            qrcode.decode();
+                        } catch(e) {
+                            scope.ngError({error: e});
+                        }
+                    }
+                }
+
+                var successCallback = function(stream) {
+                    video.srcObject = stream;
+                    $window.localMediaStream = stream;
+
+                    scope.video = video;
+
+                    video.play();
+                    stopScan = $interval(scan, 500);
+                }
+
+                // Call the getUserMedia method with our callback functions
+                if (navigator.getUserMedia) {
+                    var constraint = {
+                        video: {
+                            facingMode: { ideal: "environment" }
+                        }
+                    };
+
+                    navigator.getUserMedia(constraint, successCallback, function(e) {
+                        scope.ngVideoError({error: e});
+                    });
+                } else {
+                    scope.ngVideoError({error: 'Native web camera streaming (getUserMedia) not supported in this browser.'});
+                }
+
+                qrcode.callback = function(data) {
+                    scope.ngSuccess({data: data});
+                };
+
+                element.bind('$destroy', function() {
+                    if ($window.localMediaStream) {
+                        $window.localMediaStream.getVideoTracks()[0].stop();
+                    }
+                    if (stopScan) {
+                        $interval.cancel(stopScan);
+                    }
+                });
+            }
         }
-      });
-    }
-  }
-}]);
+    }]);
 })();