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London | 25-ITP-September | Ammad Ur Rehman | Sprint 3 | [TECH ED] Build alarm clock app #830

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anosidium wants to merge 6 commits into from
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London | 25-ITP-September | Ammad Ur Rehman | Sprint 3 | [TECH ED] Build alarm clock app #830

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55bfe45
Set the title to "Alarm clock app"
anosidium Nov 8, 2025
d79be01
Implement the count down functionality
anosidium Nov 8, 2025
b82d141
Play the alarm when the countdown reaches 0
anosidium Nov 8, 2025
c94334d
Flash the webpage background when the countdown reaches 0
anosidium Nov 8, 2025
6d35ec1
Format the code
anosidium Nov 8, 2025
de4e168
Add pause feature to pause the alarm clock and then resume it
anosidium Nov 10, 2025
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55 changes: 54 additions & 1 deletion Sprint-3/alarmclock/alarmclock.js
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Original file line number Diff line number Diff line change
@@ -1,4 +1,57 @@
function setAlarm() {}
let intervalID = null;
let seconds = 0;
let isPaused = false;

function setAlarm() {
const alarmSetInputElement = document.getElementById("alarmSet");
const setAlarmButton = document.getElementById("set");
const delay = 1 * 1000;

const updateTimeRemaining = () => {
if (!isPaused && seconds <= 0) {
document.body.className = "flash";
playAlarm();
clearInterval(intervalID);
intervalID = null;
setAlarmButton.textContent = "Set Alarm";
return;
}

seconds--;
setRemainingTime(seconds);
};

if (intervalID) {
clearInterval(intervalID);
intervalID = null;
isPaused = true;
setAlarmButton.textContent = "Resume Alarm";
return;
}

if (isPaused) {
isPaused = false;
intervalID = setInterval(updateTimeRemaining, delay);
setAlarmButton.textContent = "Pause Alarm";
return;
}

seconds = Number(alarmSetInputElement.value);
setRemainingTime(seconds);
intervalID = setInterval(updateTimeRemaining, delay);
setAlarmButton.textContent = "Pause Alarm";
}

function setRemainingTime(seconds) {
const timeString = new Date(seconds * 1000).toLocaleTimeString([], {
minute: "numeric",
second: "numeric",
});

document.getElementById(
"timeRemaining"
).innerHTML = `Time Remaining: ${timeString}`;
}

// DO NOT EDIT BELOW HERE

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2 changes: 1 addition & 1 deletion Sprint-3/alarmclock/index.html
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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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13 changes: 13 additions & 0 deletions Sprint-3/alarmclock/style.css
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Original file line number Diff line number Diff line change
Expand Up @@ -13,3 +13,16 @@
h1 {
text-align: center;
}

.flash {
animation: flash 500ms infinite;
}

@keyframes flash {
0%, 49% {
background: white;
}
50%, 100% {
background: red;
}
}