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@shvchk
Created August 12, 2020 23:55
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Growing rings spinner / loader
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Growing rings</title>
<style>
:root {
--pi: 3.141592653589793;
}
body {
background: #000;
}
svg {
overflow: visible;
}
.loading {
width: 94px; /* +1px stroke width on all sides */
height: 94px; /* +1px stroke width on all sides */
padding: 50px;
transform: rotate(-90deg);
}
.ring {
fill: none;
stroke: #fff;
stroke-width: 1.25;
stroke-dasharray: 0, calc(2 * var(--pi) * var(--r));
stroke-dashoffset: 0;
animation: dash 2.5s cubic-bezier(0, .5, 1, 1) infinite;
}
.ring-0 {
--r: 1%;
animation-delay: 1.4s;
}
.ring-1 {
--r: 8%;
animation-delay: 1.2s;
}
.ring-2 {
--r: 15%;
animation-delay: 1s;
}
.ring-3 {
--r: 22%;
animation-delay: .8s;
}
.ring-4 {
--r: 29%;
animation-delay: .6s;
}
.ring-5 {
--r: 36%;
animation-delay: .4s;
}
.ring-6 {
--r: 43%;
animation-delay: .2s;
}
.ring-7 {
--r: 50%;
}
@keyframes dash {
0% {
stroke-dasharray: 0, calc(2 * var(--pi) * var(--r));
stroke-dashoffset: 0;
}
50% {
stroke-dasharray: calc(2 * var(--pi) * var(--r));
stroke-dashoffset: 0;
}
100% {
stroke-dasharray: calc(2 * var(--pi) * var(--r));
stroke-dashoffset: calc(-2 * var(--pi) * var(--r));
}
}
</style>
</head>
<body>
<div class="item loading">
<svg class="rings" viewBox="0 0 100 100">
<svg class="ring ring-0" >
<circle cx="50%" cy="50%" r="1%"></circle>
</svg>
<svg class="ring ring-1" >
<circle cx="50%" cy="50%" r="8%"></circle>
</svg>
<svg class="ring ring-2" >
<circle cx="50%" cy="50%" r="15%"></circle>
</svg>
<svg class="ring ring-3" >
<circle cx="50%" cy="50%" r="22%"></circle>
</svg>
<svg class="ring ring-4" >
<circle cx="50%" cy="50%" r="29%"></circle>
</svg>
<svg class="ring ring-5">
<circle cx="50%" cy="50%" r="36%"></circle>
</svg>
<svg class="ring ring-6">
<circle cx="50%" cy="50%" r="43%"></circle>
</svg>
<svg class="ring ring-7">
<circle cx="50%" cy="50%" r="50%"></circle>
</svg>
</svg>
</div>
</body>
</html>
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