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Birmingham | 25-ITP-Sept | Khor Biel | Sprint 3 | Alarm clock App #843

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Birmingham | 25-ITP-Sept | Khor Biel | Sprint 3 | Alarm clock App #843

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e328b18
Implemented alarmclock
wankoak Nov 15, 2025
f8f147c
Fixed set alarm button
wankoak Nov 19, 2025
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59 changes: 58 additions & 1 deletion Sprint-3/alarmclock/alarmclock.js
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Original file line number Diff line number Diff line change
@@ -1,4 +1,61 @@
function setAlarm() {}
function setAlarm() {
const input = document.getElementById("alarmSet");
const heading = document.getElementById("timeRemaining");

// Read and trim input
const raw = input.value.trim();

// If input is empty, do nothing (don't start the alarm)
if (raw === "") {
heading.innerText = `Time Remaining: 00:00`;
return;
}

// Parse total seconds from input
let totalSeconds = parseInt(raw, 10);
if (Number.isNaN(totalSeconds) || totalSeconds <= 0) {
// invalid or non-positive input -> do nothing
heading.innerText = `Time Remaining: 00:00`;
return;
}

// Format seconds into "MM:SS"
function formatTime(seconds) {
const minutes = Math.floor(seconds / 60);
const secs = seconds % 60;
return `Time Remaining: ${String(minutes).padStart(2, "0")}:${String(
secs
).padStart(2, "0")}`;
}

// Immediately set the heading to the initial value
heading.innerText = formatTime(totalSeconds);

// If a previous interval exists, clear it so we only have one running
if (window._alarmInterval) {
clearInterval(window._alarmInterval);
window._alarmInterval = null;
}

// Start counting down every 1000ms
window._alarmInterval = setInterval(() => {
totalSeconds -= 1;

if (totalSeconds <= 0) {
// update to 00:00, stop interval and play alarm
heading.innerText = formatTime(0);
clearInterval(window._alarmInterval);
window._alarmInterval = null;
if (typeof playAlarm === "function") {
playAlarm();
}
} else {
// update heading with remaining time
heading.innerText = formatTime(totalSeconds);
}
}, 1000);
}


// DO NOT EDIT BELOW HERE

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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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4 changes: 2 additions & 2 deletions Sprint-3/reading-list/index.html
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Original file line number Diff line number Diff line change
Expand Up @@ -3,8 +3,8 @@
<head>
<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>
<link rel="stylesheet" href="style.css">
<title></title>
</head>
<body>
<div id="content">
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