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Analog Clock Using HTML, CSS & JavaScript

Step 1. Create an HTML Frontend page

Creating an HTML front using the code below.

<!DOCTYPE html>
<html lang="en" dir="ltr"> 
   <head>
      <meta charset="utf-8">
      <title> Analog Clock | JITHU THOMAS</title>
      <link rel="stylesheet" href="style.css">
   </head>
   <body>
      <div class="clock">
         <div class="center-nut"></div>
         <div class="center-nut2"></div>
         <div class="indicators">
            <div></div>
            <div></div>
            <div></div>
            <div></div>
            <div></div>
            <div></div>
            <div></div>
            <div></div>
            <div></div>
            <div></div>
            <div></div>
            <div></div>
         </div>
         <div class="sec-hand">
            <div class="sec"></div>
         </div>
         <div class="min-hand">
            <div class="min"></div>
         </div>
         <div class="hr-hand">
            <div class="hr"></div>
         </div>
      </div>
<script src="script.js"></script>
</body>
</html>

Step 2. Style using CSS

Make the style using CSS as follows.

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  height: 100%;
}

body {
  display: grid;
  place-items: center;
  background: #000000;
  text-align: center;
}

.clock {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #dde1e7;
  height: 250px;
  width: 250px;
  border-radius: 50%;
  box-shadow: -3px -3px 7px #ffffff73, 3px 3px 5px rgba(94, 104, 121, 0.288);
}

.clock:before {
  position: absolute;
  content: '';
  height: 220px;
  width: 220px;
  background: #dde1e7;
  border-radius: 50%;
  box-shadow: inset -3px -3px 7px #ffffff73, inset 3px 3px 5px rgba(94, 104, 121, 0.288);
}

.clock:after {
  position: absolute;
  content: '';
  height: 120px;
  width: 120px;
  background: #dde1e7;
  border-radius: 50%;
  box-shadow: -1px -1px 5px #ffffff73, 1px 1px 3px rgba(94, 104, 121, 0.288);
}

.clock .center-nut {
  height: 15px;
  width: 15px;
  background: #404040;
  border-radius: 50%;
  z-index: 2;
  position: absolute;
}

.clock .center-nut2 {
  height: 9px;
  width: 9px;
  background: #3498db;
  border-radius: 50%;
  z-index: 15;
  position: absolute;
}

.indicators div {
  position: absolute;
  width: 2px;
  height: 5px;
  background: #404040;
}

.indicators div:nth-child(1) {
  transform: rotate(30deg) translateY(-100px);
}

.indicators div:nth-child(2) {
  transform: rotate(60deg) translateY(-100px);
}

.indicators div:nth-child(3) {
  background: #3498db;
  transform: rotate(90deg) translateY(-100px);
}

.indicators div:nth-child(4) {
  transform: rotate(120deg) translateY(-100px);
}

.indicators div:nth-child(5) {
  transform: rotate(150deg) translateY(-100px);
}

.indicators div:nth-child(6) {
  background: #3498db;
  transform: rotate(180deg) translateY(-100px);
}

.indicators div:nth-child(7) {
  transform: rotate(210deg) translateY(-100px);
}

.indicators div:nth-child(8) {
  transform: rotate(240deg) translateY(-100px);
}

.indicators div:nth-child(9) {
  background: #3498db;
  transform: rotate(270deg) translateY(-100px);
}

.indicators div:nth-child(10) {
  transform: rotate(300deg) translateY(-100px);
}

.indicators div:nth-child(11) {
  transform: rotate(330deg) translateY(-100px);
}

.indicators div:nth-child(12) {
  background: #3498db;
  transform: rotate(360deg) translateY(-100px);
}

.sec-hand,
.min-hand,
.hr-hand {
  position: absolute;
}

.sec-hand,
.sec {
  height: 180px;
  width: 180px;
  z-index: 6;
}

.min-hand,
.min {
  height: 140px;
  width: 140px;
  z-index: 5;
}

.hr-hand,
.hr {
  height: 110px;
  width: 110px;
  z-index: 4;
}

.sec,
.min,
.hr {
  display: flex;
  justify-content: center;
  position: absolute;
}

.sec:before {
  position: absolute;
  content: '';
  height: 110px;
  width: 3px;
  background: #3498db;
}

.sec:after {
  position: absolute;
  content: '';
  height: 35px;
  width: 7px;
  background: #3498db;
  top: 105px;
  border-radius: 5px;
}

.min:before {
  position: absolute;
  content: '';
  width: 1px;
  top: -15px;
  border-left: 3px solid transparent;
  border-right: 3px solid transparent;
  border-bottom: 60px solid #e95949;
}

.min:after {
  position: absolute;
  content: '';
  width: 3px;
  top: 40px;
  border-left: 2px solid transparent;
  border-right: 2px solid transparent;
  border-top: 30px solid #e95949;
}

.hr:before {
  position: absolute;
  content: '';
  width: 1px;
  border-left: 3px solid transparent;
  border-right: 3px solid transparent;
  border-bottom: 35px solid #303030;
}

.hr:after {
  position: absolute;
  content: '';
  width: 3px;
  top: 34px;
  border-left: 2px solid transparent;
  border-right: 2px solid transparent;
  border-top: 25px solid #303030;
}

Step 3. Make the clock move using Javascript

The Backend JS is as follows.

const sec = document.querySelector(".sec");
const min = document.querySelector(".min");
const hr = document.querySelector(".hr");

setInterval(function() {
  let time  = new Date();
  let secs = time.getSeconds() * 6;
  let mins = time.getMinutes() * 6;
  let hrs = time.getHours() * 30;
  sec.style.transform = `rotateZ(${secs}deg)`;
  min.style.transform = `rotateZ(${mins}deg)`;
  hr.style.transform = `rotateZ(${hrs+(mins/12)}deg)`;
});

Step 4. Make the Script run


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