⏳Custom Countdown Timer | JavaScript
Tags: javascript, css, beginners, html
Published: 2022-06-22 15:12:43

**Learn How To Create A Custom Countdown Timer using JavaScript step-by-step from scratch.**


{% youtube j1_KKViRS4s %}

***

**Markup**
```html
<!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**
```css
@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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