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London | 26 ITP January | Mouawia Elkhalifa | Sprint 3 | Alarm Clock #1087

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London | 26 ITP January | Mouawia Elkhalifa | Sprint 3 | Alarm Clock #1087

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debc327
Complete alarm clock
MouawiaElkhalifa Mar 24, 2026
0614dd3
temp fix for alarm clock
MouawiaElkhalifa Apr 5, 2026
c171be8
fix: address reviewer feedback for reset and stop logic
MouawiaElkhalifa Apr 6, 2026
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55 changes: 53 additions & 2 deletions Sprint-3/alarmclock/alarmclock.js
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Original file line number Diff line number Diff line change
@@ -1,4 +1,48 @@
function setAlarm() {}
let countdown = null;

function updateDisplay(time) {
const timeDisplay = document.getElementById("timeRemaining");
let minutes = Math.floor(time / 60)
.toString()
.padStart(2, "0");
let seconds = (time % 60).toString().padStart(2, "0");
timeDisplay.innerText = "Time Remaining: " + minutes + ":" + seconds;
}

function resetAlarm() {
if (countdown !== null) {
clearInterval(countdown);
countdown = null;
}

pauseAlarm();
audio.currentTime = 0;
updateDisplay(0);
}

function setAlarm() {
resetAlarm();

let secondsLeft = parseInt(document.getElementById("alarmSet").value, 10);

if (isNaN(secondsLeft) || secondsLeft <= 0) {
updateDisplay(0);
return;
}

updateDisplay(secondsLeft);

countdown = setInterval(() => {
secondsLeft = secondsLeft - 1;
updateDisplay(secondsLeft);

if (secondsLeft <= 0) {
clearInterval(countdown);
countdown = null;
playAlarm();
}
}, 1000);
}

// DO NOT EDIT BELOW HERE

Expand All @@ -12,6 +56,13 @@ function setup() {
document.getElementById("stop").addEventListener("click", () => {
pauseAlarm();
});

document.getElementById("stop").addEventListener("click", () => {
if (countdown !== null) {
clearInterval(countdown);
countdown = null;
}
Comment on lines +61 to +64
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@cjyuan cjyuan Apr 6, 2026

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Could also consider using resetAlarm as the callback, trading slight inefficiency for simplicity (and to keep the logic of resetting the alarm in one place). The code won't break when pauseAlarm() is called twice.

});
}

function playAlarm() {
Expand All @@ -22,4 +73,4 @@ function pauseAlarm() {
audio.pause();
}

window.onload = setup;
window.onload = setup;
2 changes: 1 addition & 1 deletion Sprint-3/alarmclock/index.html
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Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,7 @@
<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>
</head>
<body>
<div class="centre">
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