Trigger alarm immediately when countdown reaches zero"

Author: Pretty Taruvinga

Sprint-3/alarmclock/alarmclock.js

@@ -29,14 +29,13 @@ function setAlarm() {
   updateDisplay(timeLeft);
 
   timer = setInterval(() => {
+    timeLeft--;
+    updateDisplay(timeLeft);
     if (timeLeft <= 0) {
       clearInterval(timer);
+      timer = null;
       playAlarm();
-      return;
     }
-
-    timeLeft--;
-    updateDisplay(timeLeft);
   }, 1000);
 }