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Manchester | 26-ITP-jan | Liban Jama | Sprint 3 | Alarm Clock #1075

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Manchester | 26-ITP-jan | Liban Jama | Sprint 3 | Alarm Clock #1075

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ba1d60c
Completed alarm clock task
libanj0161 Mar 23, 2026
0bcf364
Merge branch 'main' into alarm.clock
libanj0161 Mar 23, 2026
16e648e
Completed extra tasks and added styling
libanj0161 Mar 24, 2026
22008f8
fixed linting issue
libanj0161 Apr 4, 2026
fc50e53
Added error handling
libanj0161 Apr 4, 2026
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34 changes: 31 additions & 3 deletions Sprint-3/alarmclock/alarmclock.js
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Original file line number Diff line number Diff line change
@@ -1,8 +1,34 @@
function setAlarm() {}
var audio = new Audio("alarmsound.mp3");

// DO NOT EDIT BELOW HERE
let countdown;

var audio = new Audio("alarmsound.mp3");
function formatTime(seconds) {
let mins = Math.floor(seconds / 60);
let secs = seconds % 60;
return String(mins).padStart(2, "0") + ":" + String(secs).padStart(2, "0");
}

function setAlarm() {
let seconds = parseInt(document.getElementById("alarmSet").value);
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@Luro91 Luro91 Apr 4, 2026

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What happens when the user enters a negative number or a string value?

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@libanj0161 libanj0161 Apr 4, 2026

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Updated to throw an error

if (!Number.isFinite(seconds) || seconds < 1) {
throw new Error("Please enter a valid number greater than 0");
}
clearInterval(countdown);
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@Luro91 Luro91 Apr 4, 2026

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Nice clearing of the interval to ensure only one countdown is running at all times

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@libanj0161 libanj0161 Apr 4, 2026

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thank you

document.getElementById("timeRemaining").textContent =
"Time Remaining: " + formatTime(seconds);

countdown = setInterval(() => {
seconds--;
document.getElementById("timeRemaining").textContent =
"Time Remaining: " + formatTime(seconds);

if (seconds <= 0) {
clearInterval(countdown);
document.body.classList.add("alarm-finished");
playAlarm();
}
}, 1000);
}

function setup() {
document.getElementById("set").addEventListener("click", () => {
Expand All @@ -19,7 +45,9 @@ function playAlarm() {
}

function pauseAlarm() {
clearInterval(countdown);
audio.pause();
document.body.classList.remove("alarm-finished");
}

window.onload = setup;
10 changes: 6 additions & 4 deletions Sprint-3/alarmclock/index.html
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Original file line number Diff line number Diff line change
@@ -1,19 +1,21 @@
<!DOCTYPE html>
<!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>
<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 class="button-group">
<button id="set" type="button">Set Alarm</button>
<button id="stop" type="button">Stop Alarm</button>
</div>
</div>
Comment on lines +15 to +19
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@Luro91 Luro91 Apr 4, 2026

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How can you format the code to indicate more clearly the hierachy of HTML elements (what is a children of what)

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@libanj0161 libanj0161 Apr 4, 2026

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formatting fixed

<script src="alarmclock.js"></script>
</body>
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109 changes: 101 additions & 8 deletions Sprint-3/alarmclock/style.css
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@Luro91 Luro91 Apr 4, 2026

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The alarm clock looks really nice now. Good job

Original file line number Diff line number Diff line change
@@ -1,15 +1,108 @@
* {
box-sizing: border-box;
}

body {
margin: 0;
font-family: Arial, sans-serif;
min-height: 100vh;
display: flex;
justify-content: center;
align-items: center;
background: linear-gradient(90deg, #fcff9e 0%, #c67700 100%);
transition: background 0.4s ease;
}

.alarm-finished {
background: linear-gradient(90deg, #FC466B 0%, #3F5EFB 100%);
animation: flashBg 0.6s infinite alternate;
}
@keyframes flashBg {
0% {
background: linear-gradient(90deg, #FC466B 0%, #3F5EFB 100%);
}
100% {
background: linear-gradient(90deg, #fcff9e 0%, #c67700 100%);
}
}

.centre {
position: fixed;
top: 50%;
left: 50%;
-webkit-transform: translate(-50%, -50%);
transform: translate(-50%, -50%);
width: 360px;
padding: 26px;
background: #ffffff;
border-radius: 20px;
box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
text-align: center;
}

label {
display: block;
margin-bottom: 10px;
font-size: 15px;
color: #555;
}

#timeRemaining {
margin: 0 0 22px;
font-size: 30px;
font-weight: bold;
color: #333;
}

label {
display: block;
margin-bottom: 10px;
font-size: 15px;
color: #555;
}

#alarmSet {
margin: 20px;
width: 100%;
padding: 12px;
font-size: 16px;
border: 2px solid #ddd;
border-radius: 12px;
outline: none;
margin-bottom: 18px;
transition: 0.2s;
}

h1 {
text-align: center;
#alarmSet:focus {
border-color: #667eea;
box-shadow: 0 0 6px rgba(102, 126, 234, 0.4);
}

.button-group {
display: flex;
gap: 12px;
}

button {
flex: 1;
padding: 12px;
font-size: 15px;
border: none;
border-radius: 12px;
cursor: pointer;
color: white;
font-weight: bold;
transition: transform 0.15s ease, box-shadow 0.15s ease;
}

#set {
background: #4CAF50;
}

#set:hover {
background: #43a047;
transform: translateY(-2px);
}

#stop {
background: #f44336;
}

#stop:hover {
background: #e53935;
transform: translateY(-2px);
}
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