Returning the request of cameras on the beginning to make sure the UI can load the cameras.

js/instascan.min.js

@@ -32640,9 +32640,13 @@ var Camera = function () {
             switch (_context3.prev = _context3.next) {
               case 0:
                 _context3.next = 2;
-                return navigator.mediaDevices.enumerateDevices();
+                return this._ensureAccess();
 
               case 2:
+                _context3.next = 4;
+                return navigator.mediaDevices.enumerateDevices();
+
+              case 4:
                 devices = _context3.sent;
                 return _context3.abrupt('return', devices.filter(function (d) {
                   return d.kind === 'videoinput';
@@ -32650,7 +32654,7 @@ var Camera = function () {
                   return new Camera(d.deviceId, cameraName(d.label));
                 }));
 
-              case 4:
+              case 6:
               case 'end':
                 return _context3.stop();
             }