diff --git a/src/js/angular-on-screen-keyboard-directive.js b/src/js/angular-on-screen-keyboard-directive.js
index f4b110e..2c0582f 100644
--- a/src/js/angular-on-screen-keyboard-directive.js
+++ b/src/js/angular-on-screen-keyboard-directive.js
@@ -84,7 +84,7 @@ angular.module('onScreenKeyboard', ['ngSanitize'])
                     } else if (key.type === 'shift') {
                         ctrl.isUpperCase = !ctrl.isUpperCase;
                         return;
-                    } else if (key.type === 'enter'){
+                    } else if (key.type === 'enter') {
                         ctrl.pressEnterKey();
                         return;
                     }
@@ -174,12 +174,12 @@ angular.module('onScreenKeyboard', ['ngSanitize'])
                     }
                 };
 
-                ctrl.pressEnterKey = function () {
+                ctrl.pressEnterKey = function() {
 
-                    $timeout(function () {
+                    $timeout(function() {
                         if (angular.element(':focus').length > 0) {
 
-                            let el = angular.element(':focus')[0],
+                            var el = angular.element(':focus')[0],
                                 down = new KeyboardEvent('keydown',
                                 {
                                     which: 13,