HTML & CSS Only Glowing Ring

html-css-only-glowing-ring.markdown

HTML & CSS Only Glowing Ring

A Pen by Greg Vissing on CodePen.

License.

index.html

<div class="container">
	<div class="loader"><span></span></div>
	<div class="loader"><span></span></div>
	<div class="loader"><i></i></div>
	<div class="loader"><i></i></div>
</div>

script.js

// Source: https://www.youtube.com/watch?v=n6ojK2HmROE

style.scss

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

@keyframes animate {
	0% {
		transform: rotate(0deg);
	}
	100% {
		transform: rotate(360deg);
	}
}

body {
	display: flex;
	justify-content: center;
	align-items: center;
	min-height: 100vh;
	background: #000;
}

.container {
	position: relative;
	width: 100%;
	height: 200px;
	display: flex;
	align-items: center;
	justify-content: center;
	-webkit-box-reflect: below 0 linear-gradient(transparent, transparent, #0005);
	.loader {
		position: absolute;
		width: 200px;
		height: 200px;
		border-radius: 50%;
		animation: animate 2s linear infinite;
		&:nth-child(1):before,
		&:nth-child(2):before {
			content: "";
			position: absolute;
			top: 0;
			left: 0;
			width: 50%;
			height: 100%;
			background: linear-gradient(to top, transparent, rgba(0, 255, 249, 0.4));
			background-size: 100px 180px;
			background-repeat: no-repeat;
			border-top-left-radius: 100px;
			border-bottom-left-radius: 100px;
		}
		&:nth-child(2),
		&:nth-child(4) {
			animation-delay: -1s;
			filter: hue-rotate(290deg);
		}
		i {
			position: absolute;
			top: 0;
			left: 50%;
			transform: translateX(-50%);
			width: 20px;
			height: 20px;
			background: #00fff9;
			border-radius: 50%;
			z-index: 100;
			box-shadow: 0 0 10px #00fff9, 
				0 0 20px #00fff9, 
				0 0 30px #00fff9,
				0 0 40px #00fff9,
				0 0 50px #00fff9,
				0 0 60px #00fff9,
				0 0 70px #00fff9,
				0 0 80px #00fff9,
				0 0 90px #00fff9,
				0 0 100px #00fff9,
		}
		span {
			position: absolute;
			inset: 20px;
			background: #000;
			border-radius: 50%;
			z-index: 1;
		}
	}
}