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Glasgow| 26-ITP-JAN |Alasdair MacDonald | Sprint 3 | Alarm Clock #1039

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Glasgow| 26-ITP-JAN |Alasdair MacDonald | Sprint 3 | Alarm Clock #1039

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7f63885
Build alarm clock countdown functionality with sound and stop feature
MacDonald91 Mar 18, 2026
b5c66ef
fix: correct time formatting for minutes and seconds
MacDonald91 Mar 21, 2026
b9165a5
Fix: alarmclock validation, formatting, and missing function
MacDonald91 Apr 15, 2026
82e848d
Merge branch 'main' into coursework/alarm-clock
MacDonald91 Apr 15, 2026
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56 changes: 39 additions & 17 deletions Sprint-3/alarmclock/alarmclock.js
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@WeiTsungCheng WeiTsungCheng Mar 30, 2026

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  1. playAlarm() no definition
  2. Inconsistent time formats

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@WeiTsungCheng WeiTsungCheng Mar 30, 2026

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parseInt(input)
if user enter character instead of Int?

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@MacDonald91 MacDonald91 Apr 15, 2026

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Thanks for the feedback!

I’ve made the following updates:

  • Added a definition for playAlarm() to resolve the missing function issue.
  • Standardised the time display format to mm:ss for consistency throughout.
  • Replaced parseInt() with Number() and added validation to handle invalid user input (e.g. non-numeric values).
  • Improved overall structure to make the timer logic clearer and more maintainable.

Let me know if there’s anything else I can improve.

Original file line number Diff line number Diff line change
@@ -1,25 +1,47 @@
function setAlarm() {}
let countdown;

// DO NOT EDIT BELOW HERE
function startTimer(input) {
const display = document.getElementById("timeRemaining");

var audio = new Audio("alarmsound.mp3");
// Validate input
const timeRemaining = Number(input);

function setup() {
document.getElementById("set").addEventListener("click", () => {
setAlarm();
});
if (isNaN(timeRemaining) || timeRemaining <= 0) {
display.textContent = "Please enter a valid number";
return;
}

document.getElementById("stop").addEventListener("click", () => {
pauseAlarm();
});
}
let remaining = timeRemaining;

function playAlarm() {
audio.play();
}
// Clear any previous timer
clearInterval(countdown);

function updateDisplay() {
const minutes = Math.floor(remaining / 60);
const seconds = remaining % 60;

display.textContent = `Time Remaining: ${String(minutes).padStart(
2,
"0"
)}:${String(seconds).padStart(2, "0")}`;
}

function pauseAlarm() {
audio.pause();
// Show initial time
updateDisplay();

countdown = setInterval(() => {
remaining--;

updateDisplay();

if (remaining <= 0) {
clearInterval(countdown);
playAlarm();
}
}, 1000);
}

window.onload = setup;
// :white_check_mark: Fix missing function
function playAlarm() {
alert("Time's up!");
}