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London | 26-ITP-May | Edina Kurdi | Sprint 3 | Alarm clock #1430

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London | 26-ITP-May | Edina Kurdi | Sprint 3 | Alarm clock #1430

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13bf268
add title to html
edinakurdi Aug 13, 2026
d22745d
start implementing setAlarm()
edinakurdi Aug 13, 2026
e667709
start implementing setAlarm() function
edinakurdi Aug 13, 2026
1751d49
start countdown
edinakurdi Aug 13, 2026
45dfc50
set a stopping point
edinakurdi Aug 13, 2026
57d6de0
delete unused code
edinakurdi Aug 14, 2026
efd9c41
add validation for user input to account for decimals and negative nu…
edinakurdi Aug 14, 2026
2e32afc
implement time conversion function to be re-used in the function
edinakurdi Aug 14, 2026
5893a8c
reset actibe timer and audio before a new countdown
edinakurdi Aug 14, 2026
3fcc665
reset input box after a timer starts
edinakurdi Aug 14, 2026
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34 changes: 33 additions & 1 deletion Sprint-3/alarmclock/alarmclock.js
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Original file line number Diff line number Diff line change
@@ -1,4 +1,36 @@
function setAlarm() {}
function timeConvert(sec) {
let minutes = String(Math.floor(sec / 60)).padStart(2, "0");
let seconds = String(sec % 60).padStart(2, "0");
return `${minutes}:${seconds}`;
}

let timer;
function setAlarm() {
clearInterval(timer);
pauseAlarm();

const timeInput = document.getElementById("alarmSet");
let remainingSeconds = parseInt(timeInput.value);
if (isNaN(remainingSeconds) || remainingSeconds <= 0) {
alert("Please provide a valid number of seconds");
return;
}

timeInput.value = "";

const timeRemaining = document.getElementById("timeRemaining");

timeRemaining.textContent = `Time Remaining: ${timeConvert(remainingSeconds)}`;

@cjyuan cjyuan Aug 14, 2026

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Could also consider turning this statement into a function:

  • Same code is used on line 27
  • displayTime(remainingSeconds) is probably more readable


timer = setInterval(() => {
remainingSeconds--;
timeRemaining.textContent = `Time Remaining: ${timeConvert(remainingSeconds)}`;
if (remainingSeconds === 0) {
playAlarm();
clearInterval(timer);
}
}, 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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