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West Midlands | ITP-Sept-25 | Georgina Rogers | Sprint 3 | Alarm Clock #905

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West Midlands | ITP-Sept-25 | Georgina Rogers | Sprint 3 | Alarm Clock #905

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dad10c9
html updated
zilinskyte Dec 1, 2025
264f3e1
prettier
zilinskyte Dec 1, 2025
2ae42af
alarm clock function
zilinskyte Dec 1, 2025
9e52377
styled moved to css file
zilinskyte Dec 2, 2025
1879d0e
mistake typing below the line removed
zilinskyte Dec 2, 2025
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78 changes: 67 additions & 11 deletions Sprint-3/alarmclock/alarmclock.js
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Original file line number Diff line number Diff line change
@@ -1,19 +1,74 @@
function setAlarm() {}
let timer = null;
let totalSeconds = 0;

// DO NOT EDIT BELOW HERE
function formatTime(seconds) {
const mins = Math.floor(seconds / 60);
const secs = seconds % 60;
return `${String(mins).padStart(2, "0")}:${String(secs).padStart(2, "0")}`;
}

var audio = new Audio("alarmsound.mp3");
function parseInputTime(value) {
if (!/^\d{2}:\d{2}$/.test(value)) return null;
const [m, s] = value.split(":").map(Number);
if (s > 59) return null;
return m * 60 + s;
}

function updateDisplay() {
document.getElementById("alarmSet").value = formatTime(totalSeconds);
document.getElementById("timeRemaining").textContent = `Time Remaining: ${formatTime(totalSeconds)}`;
}

function incrementTime(amount) {
totalSeconds += amount;
if (totalSeconds < 0) totalSeconds = 0;
updateDisplay();
}

function setAlarm() {
const input = document.getElementById("alarmSet");
const parsed = parseInputTime(input.value);
if (parsed === null) {
alert("Use MM:SS format");
return;
}

function setup() {
document.getElementById("set").addEventListener("click", () => {
setAlarm();
});
totalSeconds = parsed;
updateDisplay();

document.getElementById("stop").addEventListener("click", () => {
pauseAlarm();
});
if (timer) clearInterval(timer);
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@cjyuan cjyuan Dec 1, 2025

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Can you think of anything else that should also be reset before starting a new countdown?


timer = setInterval(() => {
totalSeconds--;
updateDisplay();
if (totalSeconds <= 0) {
clearInterval(timer);
timer = null;
playAlarm();
}
}, 1000);
}

function stopTimer() {
if (timer) {
clearInterval(timer);
timer = null;
}
totalSeconds = 0;
updateDisplay();
pauseAlarm();
}

// attach to window so HTML buttons can call them
window.incrementTime = incrementTime;
window.setAlarm = setAlarm;
window.stopTimer = stopTimer;
Comment on lines +63 to +65
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@cjyuan cjyuan Dec 1, 2025 •
edited
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Are you aware of some of the pros and cons between these two approaches of invoking a callback function?
(1) The approach you are using
(2) Assign an ID to the element and attach a callback function to the element as

document.getElementbyId('id-of-the-element').addEventListener('event-name', callback);

window.playAlarm = playAlarm;
window.pauseAlarm = pauseAlarm;

// DO NOT EDIT BELOW HERE
var audio = new Audio("alarmsound.mp3");

function playAlarm() {
audio.play();
}
Expand All @@ -22,4 +77,5 @@ function pauseAlarm() {
audio.pause();
}

window.onload = setup;


92 changes: 84 additions & 8 deletions Sprint-3/alarmclock/index.html
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Original file line number Diff line number Diff line change
Expand Up @@ -3,18 +3,94 @@
<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>
<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" />
<div
style="
font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
height: 100vh;
gap: 15px;
"
>
<label for="alarmSet" style="font-size: 44px; font-weight: bold"
>Set time to:</label
>

<button id="set" type="button">Set Alarm</button>
<button id="stop" type="button">Stop Alarm</button>
<input
id="alarmSet"
type="text"
maxlength="5"
placeholder="00:00"
value="00:00"
style="
font-size: 64px;
text-align: center;
width: 200px;
padding: 15px;
border-radius: 10px;
border: 3px solid #0904b0;
"
/>

<div style="display: flex; gap: 10px">
<button
onclick="incrementTime(5)"
style="
font-size: 20px;
padding: 10px 15px;
border-radius: 6px;
border: 2px solid #444;
"
>
▲ +5
</button>
<button
onclick="incrementTime(-5)"
style="
font-size: 20px;
padding: 10px 15px;
border-radius: 6px;
border: 2px solid #444;
"
>
▼ -5
</button>
</div>

<button
onclick="setAlarm()"
style="
font-size: 30px;
padding: 10px 20px;
border-radius: 8px;
border: 3px solid green;
"
>
SET
</button>

<h1 id="timeRemaining" style="font-size: 36px; font-weight: 900">
Time Remaining:<br />00:00
</h1>

<button
onclick="stopTimer()"
style="
font-size: 40px;
padding: 15px 30px;
border-radius: 10px;
border: 4px solid red;
"
>
STOP
</button>
</div>

<script src="alarmclock.js"></script>
</body>
</html>
66 changes: 57 additions & 9 deletions Sprint-3/alarmclock/style.css
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Original file line number Diff line number Diff line change
@@ -1,15 +1,63 @@
.centre {
position: fixed;
top: 50%;
left: 50%;
-webkit-transform: translate(-50%, -50%);
transform: translate(-50%, -50%);
.container {
font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
height: 100vh;
gap: 15px;
}

#alarmSet {
margin: 20px;
.time-label {
font-size: 44px;
font-weight: bold;
}

h1 {
.time-input {
font-size: 64px;
text-align: center;
width: 200px;
padding: 15px;
border-radius: 10px;
border: 3px solid #0904b0;
}

.increment-buttons {
display: flex;
gap: 10px;
}

.increment-buttons button {
font-size: 20px;
padding: 10px 15px;
border-radius: 6px;
border: 2px solid #444;
}

.set-button {
font-size: 30px;
padding: 10px 20px;
border-radius: 8px;
border: 3px solid green;
}

.time-remaining {
font-size: 36px;
font-weight: 900;
text-align: center;
}

.stop-button {
font-size: 40px;
padding: 15px 30px;
border-radius: 10px;
border: 4px solid red;
}

.stop-large-button {
font-size: 40px;
padding: 15px 30px;
border-radius: 10px;
border: 4px solid red;
}