CSS radial progress bar - Animate All the Things!

by Anders Ingemann

HTML

<script src="//cdnjs.cloudflare.com/ajax/libs/less.js/1.6.1/less.min.js"></script>
<div class="radial-progress" data-progress="0">
	<div class="circle">
		<div class="mask full">
			<div class="fill"></div>
		</div>
		<div class="mask half">
			<div class="fill"></div>
			<div class="fill fix"></div>
		</div>
		<div class="shadow"></div>
	</div>
	<div class="inset">
		<div class="percentage">
			<div...

CSS

@import url(http://fonts.googleapis.com/css?family=Lato:100,300,400,700,900,100italic,300italic,400italic,700italic,900italic);

.radial-progress {
	@circle-size: 120px;
	@circle-background: #d6dadc;
	@circle-color: #97a71d;
	@inset-size: 90px;
	@inset-color: #fbfbfb;
	@transition-length: 1s;
	@shadow: 6px 6px 10px rgba(0,0,0,0.2);
	@percentage-color: #97a71d;
	@percentage-font-size: 22px;
	@percentage-text-width: 57px;

	margin: 50px;
	width:  @circle-size;
	height: @circle-size;

	background-color: @circle-background;
	border-radius: 50%;
	.circle {
		.mask, .fill, .shadow {
			width:    @circle-size;
			height:   @circle-size;
			position: absolute;
			border-radius: 50%;
		}
		.shadow {
			box-shadow: @shadow inset;
		}
		.mask, .fill {
			-webkit-backface-visibility: hidden;
			transition: -webkit-transform @transition-length;
			transition: -ms-transform @transition-length;
			transition: transform @transition-length;
			border-radius: 50%;
		}
		.mask {
			clip: rect(0px, @circle-size, @circle-size, @circle-size/2);
			.fill {
				clip: rect(0px, @circle-size/2, @circle-size, 0px);
				background-color: @circle-color;
			}
		}
	}
	.inset {
		width:       @inset-size;
		height:      @inset-size;
		position:    absolute;
		margin-left: (@circle-size - @inset-size)/2;
		margin-top:  (@circle-size - @inset-size)/2;

		background-color: @inset-color;
		border-radius: 50%;
		box-shadow: @shadow;
		.percentage {
			height:   @percentage-font-size;
			width:    @percentage-text-width;
			overflow: hidden;

			position: absolute;
			top:      (@inset-size - @percentage-font-size) / 2;
			left:     (@inset-size - @percentage-text-width) / 2;

			line-height: 1;
			.numbers {
				margin-top: -@percentage-font-size;
				transition: width @transition-length;
				span {
					width:          @percentage-text-width;
					display:        inline-block;
					vertical-align: top;
					text-align:     center;
					font-weight:    800;
					font-size:     ...

JavaScript

$('head style[type="text/css"]').attr('type', 'text/less');
less.refreshStyles();
window.randomize = function() {
	$('.radial-progress').attr('data-progress', Math.floor(Math.random() * 100));
}
setTimeout(window.randomize, 200);
$('.radial-progress').click(window.randomize);

// Read more here: https://medium.com/@andsens/radial-progress-indicator-using-css-a917b80c43f9