JavaScript Countdown Timer Example
In this tutorial, we will create a simple countdown timer using JavaScript. JS is rich in features so it’s not a tough job.
Steps
Step 1: Set the countdown date and time.
Step 2: Get the current date and time.
Step 3: Get the difference between the countdown and the current date.
Step 4: Update it on every second.
Step 5: Do something when competed.
JavaScript
To make it more clear, I have separated all the file. JS will do all the work for the countdown.
countdown.js
// Set the countdown date and time(24 hour format)
var countDownDateTime = new Date("Oct 22, 2050 00:00:00").getTime();
// update every second
var myInterval = setInterval(function () {
// get the current date and time
var currentDateTime = new Date().getTime();
// Calculate the diffrence between countdown and current date
var diff = countDownDateTime - currentDateTime;
// Time calculations for days, hours, minutes and seconds
var days = Math.floor(diff / (1000 * 60 * 60 * 24));
var hours = Math.floor((diff % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));
var minutes = Math.floor((diff % (1000 * 60 * 60)) / (1000 * 60));
var seconds = Math.floor((diff % (1000 * 60)) / 1000);
// Show on HTML
document.getElementById("days").innerHTML = days;
document.getElementById("hours").innerHTML = hours;
document.getElementById("minutes").innerHTML = minutes;
document.getElementById("seconds").innerHTML = seconds;
// Do something when it completed.
if (diff < 0) {
clearInterval(myInterval);
document.getElementById("countDownBlock").style.display = "none";
document.getElementById("completed").style.display = "block";
}
}, 1000);CSS
Make the countdown block beautiful by adding some CSS rule.
countdown.css
h1{color: #396;font-weight: 100;font-size: 40px;margin: 40px 0px 20px;}
#clockdiv{font-family: sans-serif;color: #fff;display: inline-block;font-weight: 100;text-align: center;font-size: 30px;}
#clockdiv > div{padding: 10px;border-radius: 3px;background: #5fba7d;display: inline-block;}
#clockdiv div > span{padding: 15px;border-radius: 3px;background: #1c1d1d;display: inline-block;}
.smalltext{padding-top: 5px;font-size: 16px;}
#countDownBlock{text-align: center; margin-top: 50px;}HTML
Display it to the users.
<!DOCTYPE html>
<html>
<head>
<title>JavaScript Countdown Timer Example</title>
<link rel="stylesheet" href="css/countdown.css" type="text/css"/>
<script type="text/javascript" src="js/countdown.js"></script>
</head>
<body>
<div id="countDownBlock">
<h1>JavaScript Countdown Timer Example</h1>
<div id="clockdiv">
<div>
<span id="days"></span>
<div class="smalltext">Days</div>
</div>
<div>
<span id="hours"></span>
<div class="smalltext">Hours</div>
</div>
<div>
<span id="minutes"></span>
<div class="smalltext">Minutes</div>
</div>
<div>
<span id="seconds"></span>
<div class="smalltext">Seconds</div>
</div>
</div>
</div>
<div id="completed" style="display: none; text-align: center;">
<h1>Congratulations for completing 34 years. </h1>
</div>
</body>
</html>Similar Posts
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