alarmclock completed

Week-3/Homework/mandatory/1-alarmclock/alarmclock.js

@@ -1,4 +1,33 @@
-function setAlarm() {}
+let alarmTimer;
+function setAlarm() {
+  var alarmSet = document.getElementById("alarmSet").value;
+  var timeRemaining = document.getElementById("timeRemaining");
+  updateTime(alarmSet, timeRemaining);
+
+  // clear previous timer
+  clearInterval(alarmTimer);
+
+  alarmTimer = setInterval(() => {
+    updateTime(alarmSet, timeRemaining);
+  }, 1000);
+
+  function updateTime(sec, node) {
+    if (sec < 1) {
+      clearInterval(alarmTimer);
+      playAlarm();
+    }
+    const time = formatTime(sec);
+    node.textContent = `Time Remaining: ${time}`;
+    alarmSet--;
+  }
+
+  function formatTime(seconds) {
+    const s = alarmSet % 60;
+    const m = Math.floor(alarmSet / 60);
+
+    return ` ${m < 10 ? `0${m}` : m}:${s < 10 ? `0${s}` : s}`;
+  }
+}
 
 // DO NOT EDIT BELOW HERE