Learn How To Create A Custom Countdown Timer using JavaScript step-by-step from scratch.
Markup
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Custom Countdown</title>
<link rel="stylesheet" href="style.css">
</head>
<body>
<!--Video Background-->
<video class="video-background" loop muted autoplay>
<source src="time.mp4">
</video>
<div class="video-overlay"></div>
<!--Container-->
<div class="container">
<!--Input-->
<div class="input-container" id="input-container">
<h1>Create a Custom Countdown</h1>
<form class="form" id="countdownForm">
<label for="title">Title</label>
<input type="text" id="title" placeholder="Your Countdown">
<label for="date-picker">Select a Date</label>
<input type="date" id="date-picker">
<button type="submit">Submit</button>
</form>
</div>
<!--Countdown-->
<div class="countdown" id="countdown" hidden>
<h1 class="countdown-title" id="countdown-title">
</h1>
<ul>
<li><span></span>Days</li>
<li><span></span>Hours</li>
<li><span></span>Minutes</li>
<li><span></span>Seconds</li>
</ul>
<button id="countdown-button">Reset</button>
</div>
<!-- Complete-->
<div class="complete" id="complete" hidden>
<h1 class="complete-title">Countdown Complete!</h1>
<h1 id="complete-info"></h1>
<button id="complete-button">New Countdown</button>
</div>
</div>
<!-- Script -->
<script src="script.js"></script>
</body>
</html>
Style
@import url('https://fonts.googleapis.com/css2?family=Roboto&display=swap');
html {
box-sizing: border-box;
}
body {
margin: 0;
min-height: 100vh;
overflow-y: hidden;
display: flex;
align-items: center;
font-family: 'Roboto', sans-serif;
}
/* Video Background */
.video-background {
position: fixed;
right: 0;
bottom: 0;
}
video {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
}
.video-overlay {
position: fixed;
left: 0;
top: 0;
height: 100vh;
width: 100vw;
background: rgba(0,0,0,0.35);
}
/* Container */
.container {
min-width: 580px;
min-height: 304px;
color: black;
margin: 0 auto;
padding: 25px 50px;
border-radius: 5px;
z-index: 2;
display: flex;
justify-content: center;
background: rgba(255,255,255,0.85);
}
.input-container {
position: relative;
top: 20px;
}
h1 {
font-size: 25px;
text-align: center;
margin-top: 0;
margin-bottom: 10px;
}
/* Form */
.form {
width: 480px;
}
label {
font-weight: bold;
margin-left: 10px;
}
input {
width: 95%;
margin-bottom: 10px;
padding: 10px;
border: 1px solid #ccc;
border-radius: 20px;
background: #fff;
outline: none;
font-family: 'Roboto',sans-serif;
}
/* Button */
button {
width: 100%;
height: 40px;
border-radius: 20px;
margin-top: 15px;
border: none;
text-transform: uppercase;
background: #006959;
color: white;
cursor: pointer;
outline: none;
transition: all 0.2s ease-in;
}
button:hover{
filter: brightness(115%);
}
button:active{
transform: scale(0.95);
}
/* Countdown */
ul {
margin-left: -45px;
}
li {
display: inline-block;
font-size: 30px;
list-style-type: none;
padding: 10px;
text-transform: uppercase;
}
li span {
display: block;
font-size: 80px;
text-align: center;
}
/* Complete */
.complete {
position: relative;
top: 60px;
}
.complete-title{
animation: complete 4s infinite;
}
@keyframes complete {
0%{
color: rgb(233,13,13);
}
25%{
color: rgb(233,211,13);
}
50%{
color: rgb(64,233,13);
transform: scale(1.5);
}
75%{
color: rgb(0,38,253);
}
100%{
color: rgb(181,16,231);
}
}
/* Media Query: Large Smartphone (Vertical) */
@media screen and (max-width: 600px) {
.video-background {
height: 100vh;
width: 100vw;
}
video {
object-fit: cover;
margin-top: -1px;
}
.container {
min-width: unset;
width: 95vw;
min-height: 245px;
padding: 20px;
margin: 10px;
}
.input-container {
top: unset;
}
.countdown {
position: relative;
top: 10px;
}
.form {
width: unset;
}
input {
width: 93%;
}
h1 {
font-size: 20px;
}
li {
font-size: 15px;
}
li span {
font-size: 40px;
}
}
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