diff --git a/www/script.js b/www/script.js
index 944a1fc..bf18cab 100644
--- a/www/script.js
+++ b/www/script.js
@@ -6,6 +6,8 @@ const body = document.querySelector("body");
 const hintCheckbox = document.querySelector("#hintCheck");
 const timerInput = document.getElementById("timerInput");
 
+const isCordova = typeof cordova !== 'undefined';
+
 const theme = localStorage.getItem('theme');
 
 if (theme == "light") {
@@ -86,10 +88,11 @@ startButton.addEventListener('click', () => {
                 break;
             }
             case 3: {
-                if (!!navigator.vibrate) {
+                if (isCordova && !!navigator.vibrate) {
                     navigator.vibrate(0);
                 }
-                if (!!StayAwake.enableScreenTimeout) {
+                
+                if (isCordova && !!StayAwake.enableScreenTimeout) {
                     StayAwake.enableScreenTimeout();
                 }
                 clearInterval(timer);
@@ -159,26 +162,28 @@ startButton.addEventListener('click', () => {
             var minutes = Math.floor((distance % (1000 * 60 * 60)) / (1000 * 60));
             var seconds = Math.floor((distance % (1000 * 60)) / 1000);
             timerElement.innerText = `${minutes.toString().padStart(2, '0')}:${seconds.toString().padStart(2, '0')}`;
-            if (!!StayAwake.disableScreenTimeout) {
+            
+            if (isCordova && !!StayAwake.disableScreenTimeout) {
                 StayAwake.disableScreenTimeout();
             }
             
             if (distance < 0) {
                 clearInterval(timer);
-
+                
                 if (!!navigator.vibrate) {
                     navigator.vibrate([1000, 500, 1000, 2000, 1000, 500, 1000, 2000, 1000, 500, 1000, 2000]);
                 }
-
-                if (!!StayAwake.enableScreenTimeout) {
+                
+                if (isCordova && !!StayAwake.enableScreenTimeout) {
                     StayAwake.enableScreenTimeout();
                 }
-
+                
                 timerElement.innerText = "Acabou!";
             }
         }, 1000)
     }
     
+    
     function changeTheme(){
         body.classList.toggle('light-theme');
         console.log(body.classList.contains('light-theme') ? "light" : "dark")