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Birmingham | 26-ITP-May | Toluwalase Tiamiyu | Sprint 3 | Alarmclock App #1321

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Birmingham | 26-ITP-May | Toluwalase Tiamiyu | Sprint 3 | Alarmclock App #1321

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507a1a6
Implement setAlarm function to parse input value and handle invalid o…
TTiamiyu Jul 27, 2026
d5cfd5b
Add timer clearing logic to setAlarm function for repeated button clicks
TTiamiyu Jul 27, 2026
54ce687
Refactor setAlarm function to improve countdown timer logic and ensur…
TTiamiyu Jul 27, 2026
a20ef05
Fix setAlarm function to return early for invalid or empty input values
TTiamiyu Jul 31, 2026
f6577e7
Fix HTML structure and update title for Alarm Clock App
TTiamiyu Jul 31, 2026
d61207f
Fix setAlarm function to handle invalid input and added a error messa…
TTiamiyu Aug 2, 2026
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46 changes: 45 additions & 1 deletion Sprint-3/alarmclock/alarmclock.js
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Original file line number Diff line number Diff line change
@@ -1,4 +1,48 @@
function setAlarm() {}
let timerInterval = null;

function setAlarm() {
const inputEl = document.getElementById("alarmSet");
const timeRemainingEl = document.getElementById("timeRemaining");

let totalSeconds = parseInt(inputEl.value, 10);

// If input is invalid or empty, default to 0
if (isNaN(totalSeconds) || totalSeconds <= 0) {
if (timerInterval) clearInterval(timerInterval); // Stop any running timer
timeRemainingEl.innerText = "Please enter a valid time (greater than 0)"; // Inform the user
return;
}
// Clear any existing timer if the button is clicked again
if (timerInterval) {
clearInterval(timerInterval);
}
// Function to render the formatted time (MM:SS) to the DOM
function updateDisplay() {
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const minutes = Math.floor(totalSeconds / 60);
const seconds = totalSeconds % 60;

const formattedMinutes = String(minutes).padStart(2, "0");
const formattedSeconds = String(seconds).padStart(2, "0");

timeRemainingEl.innerText = `Time Remaining: ${formattedMinutes}:${formattedSeconds}`;
}
// 1. Immediately set heading on button click
updateDisplay();

// 2. Start the countdown timer
timerInterval = setInterval(() => {
totalSeconds -= 1;

if (totalSeconds >= 0) {
updateDisplay();
}

if (totalSeconds === 0) {
playAlarm();
clearInterval(timerInterval);
}
}, 1000);
}

// DO NOT EDIT BELOW HERE

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37 changes: 20 additions & 17 deletions Sprint-3/alarmclock/index.html
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Original file line number Diff line number Diff line change
@@ -1,20 +1,23 @@
<!DOCTYPE html>
<html lang="en">
<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>
</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" />

<button id="set" type="button">Set Alarm</button>
<button id="stop" type="button">Stop Alarm</button>
</div>
<script src="alarmclock.js"></script>
</body>
</html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<link rel="stylesheet" href="style.css" />
<title>Alarm Clock App</title>
</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" />

<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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