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HTML

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HTML preprocessors can make writing HTML more powerful or convenient. For instance, Markdown is designed to be easier to write and read for text documents and you could write a loop in Pug.

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About the <head>

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Insecure Resource

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CSS

About CSS Preprocessors

CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

About CSS Base

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

Vendor Prefixing

About Vendor Prefixing

To get the best cross-browser support, it is a common practice to apply vendor prefixes to CSS properties and values that require them to work. For instance -webkit- or -moz-.

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JavaScript

About JavaScript Preprocessors

JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

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Babel includes JSX processing.

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Packages

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HTML 

              
                p A COLLECTION OF
h1 SCROLL DOWN INDICATORS
.items
	- for(var i=0; i<6; i++)
		.item
			.mouse(class="m-"+i)
!

CSS 

              
                $c: #999
$d: transparentize($c, .45)
$t: transparentize($c, .75)

.items
	width: 510px
	margin: 0 auto
	display: grid
	grid-template-columns: repeat(3, 1fr)
	grid-gap: 30px

.item
	width: 150px
	height: 150px
	border: 1px solid $d
	position: relative
	
.mouse
	width: 40px
	height: 60px
	border-radius: 20px
	border: 3px solid $c
	position: absolute
	top: calc(50% - 30px)
	left: calc(50% - 20px)
	&:before, &:after
		content: ''
		display: block
		position: absolute

/* First */
.m-0
	&:before
		height: 30px
		width: 4px
		top: 10px
		left: calc(50% - 2px)
		background: $d
		border-radius: 2px
	&:after
		width: 10px
		height: 10px
		border-radius: 50%
		top: 15px
		left: calc(50% - 5px)
		background: $c
		animation: m-0-ball 1.2s ease-in-out infinite
	
@keyframes m-0-ball
	40%, 60%
		transform: translateY(10px)
/* Second */
.m-1
	&:before
		width: 10px
		height: 10px
		border-radius: 50%
		top: 10px
		left: calc(50% - 5px)
		background: $c
		animation: m-1-ball 1.2s cubic-bezier(0.215, 0.61, 0.355, 1) infinite
	
@keyframes m-1-ball
	0%, 65%, 100%
		opacity: 0
	10%, 40%
		opacity: 1
	0%
		transform: translateY(5px) scale(.7)
	5%
		transform: scale(.7)
	15%, 100%
		transform: scale(1)
	45%, 65%
		transform: translateY(24px) scale(.7)

/* Third */
.m-2
	&:before
		width: 4px
		height: 34px
		border-radius: 2px
		top: 10px
		left: calc(50% - 2px)
		background: $c
		animation: m-2-ball 1.2s cubic-bezier(0.455, 0.03, 0.515, 0.955) infinite
	
@keyframes m-2-ball
	0%, 50%, 60%
		transform: scaleY(0.118)
	30%
		transform: scaleY(1)
	0%, 29.99%
		transform-origin: top
	30%, 100%
		transform-origin: bottom
	90%, 100%
		transform: scaleY(0.118) translateY(-255px)

/* Fourth */
.m-3
	&:before
		width: 6px
		height: 6px
		border-radius: 50%
		top: 6px
		left: calc(50% - 3px)
		box-shadow: 0 6px 0 0 $c, 0 18px 0 0 $c, 0 30px 0 0 $c
		animation: m-3-ball 1.2s ease-in-out infinite
	
@keyframes m-3-ball
	0%, 100%
		box-shadow: 0 6px 0 0 $t, 0 18px 0 0 $t, 0 30px 0 0 $t
	25%
		box-shadow: 0 6px 0 0 $c, 0 18px 0 0 $t, 0 30px 0 0 $t
	50%
		box-shadow: 0 6px 0 0 $t, 0 18px 0 0 $c, 0 30px 0 0 $t
	75%
		box-shadow: 0 6px 0 0 $t, 0 18px 0 0 $t, 0 30px 0 0 $c

/* Fifth */
.m-4
	&:before, &:after
		width: 6px
		height: 6px
		border-radius: 50%
		top: 10px
		left: calc(50% - 3px)
		background: $c
		opacity: 0
		animation: m-4-ball 1.2s ease-in-out infinite
	&:after
		animation-delay: .6s
	
@keyframes m-4-ball
	50%
		opacity: 1
	47.5%, 52.5%
		transform: translateY(10px)
	100%
		transform: translateY(20px)

/* Sixth */
.m-5
	&:before
		width: 10px
		height: 10px
		border-radius: 50%
		top: 10px
		left: calc(50% - 5px)
		border: 2px solid $d
	&:after
		top: 30px
		left: calc(50% - 5px)
		border: 5px solid transparent
		border-top-color: $c
		animation: m-5-arrow 1.2s ease-in-out infinite
	
@keyframes m-5-arrow
	20%, 100%
		transform: translateY(0)
	50%
		transform: translateY(9px)
	80%
		transform: translateY(-3px)

/* General */
html, body
	width: 100%
	height: 100%
	display: flex
	justify-content: center
	align-items: center
	flex-direction: column
	background: radial-gradient(top left, #E0F2F1, #FFF8E1, #FFEBEE)
	font-family: 'Montserrat Alternates', sans-serif
	color: $c

*
	&, &:after, &:before
		box-sizing: border-box

h1
	font-size: 1rem
	margin-top: 0
	margin-bottom: 30px

p
	font-size: .85rem
!

JS
!
999px

Console