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@m1k3yfoo
Created December 29, 2017 18:42
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[CSS Clock] A clock animated by CSS transforms #CSS #JavaScript
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>JS + CSS Clock</title>
</head>
<body>
<div class="clock">
<div class="clock-face">
<div class="hand hour-hand"></div>
<div class="hand min-hand"></div>
<div class="hand second-hand"></div>
</div>
</div>
<style>
html {
background:#018DED url(http://unsplash.it/1500/1000?image=881&blur=50);
background-size:cover;
font-family:'helvetica neue';
text-align: center;
font-size: 10px;
}
body {
margin: 0;
font-size: 2rem;
display:flex;
flex:1;
min-height: 100vh;
align-items: center;
}
.clock {
width: 30rem;
height: 30rem;
border:20px solid white;
border-radius:50%;
margin:50px auto;
position: relative;
padding:2rem;
box-shadow:
0 0 0 4px rgba(0,0,0,0.1),
inset 0 0 0 3px #EFEFEF,
inset 0 0 10px black,
0 0 10px rgba(0,0,0,0.2);
}
.clock-face {
position: relative;
width: 100%;
height: 100%;
transform: translateY(-3px); /* account for the height of the clock hands */
}
.hand {
width:50%;
height:6px;
background:black;
position: absolute;
top:50%;
transform-origin: 100%; /* Default is 50% */
/* Set default position of the hands at midnight */
transform: rotate(90deg);
transition: all 0.05s;
transition-timing-function: cubic-bezier(0, 2.53, 0.58, 1);
}
.min-hand {
width:50%;
height:6px;
background:black;
}
</style>
<script>
const secHand = document.querySelector('.second-hand');
const minHand = document.querySelector('.min-hand');
const hourHand = document.querySelector('.hour-hand');
function setDate() {
const now = new Date();
const seconds = now.getSeconds();
const minutes = now.getMinutes();
const hours = now.getHours();
// We're adding 90 to offset the default 90 degrees set in CSS transform
const secondsDegrees = ((seconds / 60) * 360) + 90;
const minutesDegrees = ((minutes / 60) * 360) + 90;
const hoursDegrees = ((hours / 60) * 360) + 90;
secHand.style.transform = `rotate(${secondsDegrees}deg)`;
minHand.style.transform = `rotate(${minutesDegrees}deg)`;
hourHand.style.transform = `rotate(${hoursDegrees}deg)`;
console.log("seconds: " + seconds);
}
// Set the function to run every second (1,000 ms)
setInterval(setDate, 1000);
</script>
</body>
</html>
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