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Glasgow| 26-ITP-JAN |Alasdair MacDonald | Sprint 3 | Alarm Clock #1039

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Glasgow| 26-ITP-JAN |Alasdair MacDonald | Sprint 3 | Alarm Clock #1039

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7f63885
Build alarm clock countdown functionality with sound and stop feature
MacDonald91 Mar 18, 2026
b5c66ef
fix: correct time formatting for minutes and seconds
MacDonald91 Mar 21, 2026
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38 changes: 36 additions & 2 deletions Sprint-3/alarmclock/alarmclock.js
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@WeiTsungCheng WeiTsungCheng Mar 30, 2026

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  1. playAlarm() no definition
  2. Inconsistent time formats

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@WeiTsungCheng WeiTsungCheng Mar 30, 2026

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parseInt(input)
if user enter character instead of Int?

Original file line number Diff line number Diff line change
@@ -1,7 +1,40 @@
function setAlarm() {}
function setAlarm() {
const input = document.getElementById("alarmSet").value;

if (!input || input <= 0) {
alert("Please enter a valid number");
return;
}

let timeRemaining = parseInt(input);
const display = document.getElementById("timeRemaining");

const minutes = Math.floor(timeRemaining / 60);
const seconds = timeRemaining % 60;

display.textContent = `Time Remaining: ${String(minutes).padStart(2, "0")}:${String(seconds).padStart(2, "0")}`;

// Clear any previous timer
clearInterval(countdown);

countdown = setInterval(() => {
timeRemaining--;

display.textContent = `Time Remaining: 00:${timeRemaining
.toString()
.padStart(2, "0")}`;

if (timeRemaining === 0) {
clearInterval(countdown);
playAlarm();
}
}, 1000);
}

// DO NOT EDIT BELOW HERE

let countdown; // 👈 needed for timer control

var audio = new Audio("alarmsound.mp3");

function setup() {
Expand All @@ -20,6 +53,7 @@ function playAlarm() {

function pauseAlarm() {
audio.pause();
clearInterval(countdown);
}

window.onload = setup;
window.onload = setup;
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