Update static/js/app.js

static/js/app.js

@@ -244,7 +244,7 @@ function getCookie(cookieName) {
   const decodedCookie = decodeURIComponent(document.cookie);
   const cookieArray = decodedCookie.split(';');
 
-  for let i = 0; i < cookieArray.length, i++ {
+  for (let i = 0; i < cookieArray.length; i++) {
     let cookie = cooieArray[i].trim();
     if (cookie.indexOf(name) === 0) {
       return cookie.substring(name.length, cookie.length);