blurry-loading
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<style>
@import url('https://fonts.googleapis.com/css?family=Ubuntu');
* {
box-sizing: border-box;
}
body {
font-family: 'Ubuntu', sans-serif;
display: flex;
align-items: center;
justify-content: center;
height: 100vh;
overflow: hidden;
margin: 0;
}
.bg {
background: url('https://images.unsplash.com/photo-1576161787924-01bb08dad4a4?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=2104&q=80')
no-repeat center center/cover;
position: absolute;
top: -30px;
left: -30px;
width: calc(100vw + 60px);
height: calc(100vh + 60px);
z-index: -1;
filter: blur(0px);
}
.loading-text {
font-size: 50px;
color: #fff;
}
</style>
<title>Blurry Loading</title>
</head>
<body>
<section class="bg"></section>
<div class="loading-text">0%</div>
<script>const loadText = document.querySelector('.loading-text')
const bg = document.querySelector('.bg')
let load = 0
let int = setInterval(blurring, 30)
function blurring() {
load++
if (load > 99) {
clearInterval(int)
}
loadText.innerText = `${load}%`
loadText.style.opacity = scale(load, 0, 100, 1, 0)
bg.style.filter = `blur(${scale(load, 0, 100, 30, 0)}px)`
}
// https://stackoverflow.com/questions/10756313/javascript-jquery-map-a-range-of-numbers-to-another-range-of-numbers
const scale = (num, in_min, in_max, out_min, out_max) => {
return ((num - in_min) * (out_max - out_min)) / (in_max - in_min) + out_min
}
</script>
</body>
</html>