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29 - Countdown Timer #38

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29 - Countdown Timer #38

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60 changes: 60 additions & 0 deletions 29 - Countdown Timer/changi.js
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Original file line number Diff line number Diff line change
@@ -0,0 +1,60 @@
let countdown; // interval
const timerDisplay = document.querySelector(".display__time-left");
const endTime = document.querySelector(".display__end-time");
const buttons = document.querySelectorAll("[data-time]");

function timer(seconds) {
clearInterval(countdown);

const now = Date.now();
const then = now + seconds * 1000;
displayTimeLeft(seconds);
displayEndTime(then);

countdown = setInterval(() => {
const secondsLeft = Math.round((then - Date.now()) / 1000);

if (secondsLeft < 0) {
clearInterval(countdown);
return;
}

displayTimeLeft(secondsLeft);
}, 1000);
}

function displayTimeLeft(seconds) {
const minutes = Math.floor(seconds / 60);
const remainderSeconds = seconds % 60;
const display = `${minutes}:${
remainderSeconds < 10 ? "0" : ""
}${remainderSeconds}`;
document.title = display;
timerDisplay.textContent = display;
}

function displayEndTime(timestamp) {
const end = new Date(timestamp);
const hour = end.getHours();
const adjustedHour = hour > 12 ? hour - 12 : hour;
const minutes = end.getMinutes();
endTime.textContent = `Be Back At ${adjustedHour}:${
minutes < 10 ? "0" : ""
}${minutes}`;
}

function startTimer() {
const seconds = parseInt(this.dataset.time);
timer(seconds);
}

buttons.forEach((button) => button.addEventListener("click", startTimer));

// get time from form tag
document.customForm.addEventListener("submit", function (e) {
e.preventDefault();
const mins = this.minutes.value;
console.log(mins);
timer(mins * 60);
this.reset();
});
53 changes: 29 additions & 24 deletions 29 - Countdown Timer/index.html
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Original file line number Diff line number Diff line change
@@ -1,29 +1,34 @@
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Countdown Timer</title>
<link href='https://fonts.googleapis.com/css?family=Inconsolata' rel='stylesheet' type='text/css'>
<link rel="stylesheet" href="style.css">
</head>
<body>
<div class="timer">
<div class="timer__controls">
<button data-time="20" class="timer__button">20 Secs</button>
<button data-time="300" class="timer__button">Work 5</button>
<button data-time="900" class="timer__button">Quick 15</button>
<button data-time="1200" class="timer__button">Snack 20</button>
<button data-time="3600" class="timer__button">Lunch Break</button>
<form name="customForm" id="custom">
<input type="text" name="minutes" placeholder="Enter Minutes">
</form>
<head>
<meta charset="UTF-8" />
<title>Countdown Timer</title>
<link
href="https://fonts.googleapis.com/css?family=Inconsolata"
rel="stylesheet"
type="text/css"
/>
<link rel="stylesheet" href="style.css" />
</head>
<body>
<div class="timer">
<div class="timer__controls">
<button data-time="20" class="timer__button">20 Secs</button>
<button data-time="300" class="timer__button">Work 5</button>
<button data-time="900" class="timer__button">Quick 15</button>
<button data-time="1200" class="timer__button">Snack 20</button>
<button data-time="3600" class="timer__button">Lunch Break</button>
<form name="customForm" id="custom">
<input type="text" name="minutes" placeholder="Enter Minutes" />
</form>
</div>
<div class="display">
<h1 class="display__time-left"></h1>
<p class="display__end-time"></p>
</div>
</div>
<div class="display">
<h1 class="display__time-left"></h1>
<p class="display__end-time"></p>
</div>
</div>

<script src="scripts-START.js"></script>
</body>
<!-- <script src="scripts-START.js"></script> -->
<script src="changi.js"></script>
</body>
</html>