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London | 26-ITP-May | Zadri Abdule | Sprint 3 | alarm-clock app #1319

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London | 26-ITP-May | Zadri Abdule | Sprint 3 | alarm-clock app #1319

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40a6a6d
implement setAlarm
Zadri415 Jul 28, 2026
df5a55f
chore(alarmclock): restore package.json to upstream state (remove loc…
Zadri415 Jul 28, 2026
d233f84
Update alarmclock.js
Zadri415 Aug 13, 2026
6ff009e
Update index.html
Zadri415 Aug 16, 2026
fdd3da8
Update index.html
Zadri415 Aug 16, 2026
6ea0737
Update alarmclock.js
Zadri415 Aug 16, 2026
86fc42f
Merge branch 'main' into sprint-3-alarmclock
Zadri415 Aug 17, 2026
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69 changes: 53 additions & 16 deletions Sprint-3/alarmclock/alarmclock.js
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Original file line number Diff line number Diff line change
@@ -1,25 +1,62 @@
function setAlarm() {}
let alarmIntervalId = null;

// DO NOT EDIT BELOW HERE
function setAlarm() {
const input = document.getElementById("alarmSet");
const heading = document.getElementById("timeRemaining");
let seconds = parseInt(input.value, 10);

var audio = new Audio("alarmsound.mp3");
// Reject invalid input instead of silently treating it as 0
if (!Number.isFinite(seconds) || seconds < 0) {
heading.innerText = "Please enter a valid number of seconds";
return;
}

function setup() {
document.getElementById("set").addEventListener("click", () => {
setAlarm();
});
function formatMMSS(s) {

@Luro91 Luro91 Jul 30, 2026

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Good job putting the code for formatting into an own function. This makes it reusable and easier to change the formtting if needed

@Zadri415 Zadri415 Aug 19, 2026

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Thanks.

const mm = Math.floor(s / 60)
.toString()
.padStart(2, "0");
const ss = (s % 60).toString().padStart(2, "0");
return `Time Remaining: ${mm}:${ss}`;
}

document.getElementById("stop").addEventListener("click", () => {
pauseAlarm();
});
}
heading.innerText = formatMMSS(seconds);

if (alarmIntervalId) {
clearInterval(alarmIntervalId);
alarmIntervalId = null;
}

function playAlarm() {
audio.play();
// If it's already zero, play immediately and don't start an interval
if (seconds === 0) {
playAlarm();
return;
}

alarmIntervalId = setInterval(() => {
seconds -= 1;
if (seconds > 0) {
heading.innerText = formatMMSS(seconds);
} else {
heading.innerText = formatMMSS(0);
clearInterval(alarmIntervalId);
alarmIntervalId = null;
playAlarm();
}
}, 1000);
}

function pauseAlarm() {
audio.pause();
function stopAlarm() {
const heading = document.getElementById("timeRemaining");

if (alarmIntervalId) {
clearInterval(alarmIntervalId);
alarmIntervalId = null;
}

heading.innerText = "Time Remaining: 00:00";
}

window.onload = setup;
document.getElementById("set").addEventListener("click", setAlarm);
document.getElementById("stop").addEventListener("click", stopAlarm);


9 changes: 4 additions & 5 deletions Sprint-3/alarmclock/index.html
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Original file line number Diff line number Diff line change
Expand Up @@ -4,17 +4,16 @@
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<link rel="stylesheet" href="style.css" />
<title>Title here</title>
<title>Alarm Clock App</title>
<script defer src="alarmclock.js"></script>
</head>
<body>
<div class="centre">
<h1 id="timeRemaining">Time Remaining: 00:00</h1>
<label for="alarmSet">Set time to:</label>
<input id="alarmSet" type="number" />

<input type="number" id="alarmSet" min="0" placeholder="Seconds" />
<h1 id="timeRemaining">Time Remaining: 00:00</h1>
<button id="set" type="button">Set Alarm</button>
<button id="stop" type="button">Stop Alarm</button>
</div>
<script src="alarmclock.js"></script>
</body>
</html>
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