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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
1e92123
Refactor alarm clock functionality and improve HTML structure
zilinskyte Dec 3, 2025
d48ff25
event handling callback function method changed
zilinskyte Dec 5, 2025
aa73c2b
alarm sound resets
zilinskyte Dec 5, 2025
feb5c66
redundant line removed
zilinskyte Dec 6, 2025
e57493f
inconsistencies addressed: math.max removed, and alarm sound edge cas…
zilinskyte Dec 6, 2025
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96 changes: 84 additions & 12 deletions Sprint-3/alarmclock/alarmclock.js
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Original file line number Diff line number Diff line change
@@ -1,25 +1,97 @@
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 setup() {
document.getElementById("set").addEventListener("click", () => {
setAlarm();
});
function updateDisplay() {
const heading = document.getElementById("timeRemaining");
const input = document.getElementById("alarmSet");

const formatted = formatTime(totalSeconds);

input.value = formatted;
heading.innerHTML = `Time Remaining:<br><br>${formatted}`;
}

document.getElementById("stop").addEventListener("click", () => {
pauseAlarm();
});
function incrementTime(amount) {
totalSeconds += amount;
if (totalSeconds < 0) totalSeconds = 0;
updateDisplay();
}

function resetAlarmState() {
if (timer) clearInterval(timer);
timer = null;

audio.pause();
audio.currentTime = 0;
}

function setAlarm() {
resetAlarmState();
const input = document.getElementById("alarmSet");
const parsed = parseInputTime(input.value);

if (parsed === null) {
alert("Use MM:SS format");
return;
}

totalSeconds = parsed;
updateDisplay();

if (totalSeconds === 0) {
playAlarm();
return;
} //Alarm plays immediately if time is set to 00:00

timer = setInterval(() => {
totalSeconds -= 1;
if (totalSeconds <= 0) {
totalSeconds = 0;
updateDisplay();
clearInterval(timer);
timer = null;
playAlarm();
return;
}
updateDisplay();
}, 1000);
}

function stopTimer() {
if (timer) clearInterval(timer);
timer = null;
totalSeconds = 0;
updateDisplay();
audio.pause();
}

document.getElementById("up").addEventListener("click", () => incrementTime(5));
document
.getElementById("down")
.addEventListener("click", () => incrementTime(-5));
document.getElementById("set").addEventListener("click", setAlarm);
document.getElementById("stop").addEventListener("click", stopTimer);

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

function playAlarm() {
audio.play();
}

function pauseAlarm() {
audio.pause();
}

window.onload = setup;
32 changes: 25 additions & 7 deletions Sprint-3/alarmclock/index.html
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Original file line number Diff line number Diff line change
Expand Up @@ -4,17 +4,35 @@
<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 class="container">
<label for="alarmSet" class="time-label">Set time to:</label>

<button id="set" type="button">Set Alarm</button>
<button id="stop" type="button">Stop Alarm</button>
<input
id="alarmSet"
class="time-input"
type="text"
maxlength="5"
placeholder="00:00"
value="00:00"
/>

<div class="increment-buttons">
<button id="up">▲ +5</button>
<button id="down">▼ -5</button>
</div>

<button id="set" class="set-button">SET</button>

<h1 id="timeRemaining" class="time-remaining">
Time Remaining:<br />00:00
</h1>
Comment on lines +29 to +31
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@cjyuan cjyuan Dec 5, 2025

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(Optional change)
You could also consider structuring the HTML like this:

      <div id="timeRemaining" class="time-remaining">
        <div>Time Remaining:</div>
        <div id="timeDisplay">00:00</div>
      </div>

This approach has several benefits:

  • Cleaner JavaScript: The JS only needs to update the dynamic value, not the static label.

  • Better semantics: h1 is meant for page headings, while div or span is more appropriate for generic UI elements. Font size and visual hierarchy should be handled with CSS instead.

  • More flexible layout: Avoid using <br> for spacing or layout in application UIs -- CSS provides far greater control and maintainability.


<button id="stop" class="stop-button">STOP</button>
</div>

<script src="alarmclock.js"></script>
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@cjyuan cjyuan Dec 5, 2025

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(Optional change)
You could also consider loading the JS code as an ES module:

<script src="alarmclock.js" type="module"></script>

This offers a couple of key advantages:

  • defer is implied: Module scripts are loaded asynchronously and executed only after the HTML document has been fully parsed.

  • Scoped execution: The code runs in the module scope, avoiding unintended pollution of the global namespace.

</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;
}