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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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Adding Classes

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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-.

We offer two popular choices: Autoprefixer (which processes your CSS server-side) and -prefix-free (which applies prefixes via a script, client-side).

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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

Add Packages

Search for and use JavaScript packages from npm here. By selecting a package, an import statement will be added to the top of the JavaScript editor for this package.

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Using packages here is powered by esm.sh, which makes packages from npm not only available on a CDN, but prepares them for native JavaScript ESM usage.

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HTML 

              
                .sun
	.sun-rays
		- for (var i = 0; i < 36; i++)
			span
!

CSS 

              
                body {
	margin: 0;
	padding: 0;
	width: 100vw;
	height: 100vh;
	overflow: hidden;
	display: flex;
	align-items: center;
	justify-content: center;
	background: linear-gradient(180deg, #111c, #fff0), radial-gradient(circle at 50% 100%, #fff, blue);
}

.sun {
	width: 40vmin;
	height: 40vmin;
	background: #ffa500;
	border-radius: 100%;
	position: absolute;
	border: 0.15vmin dotted #885b09;
	box-sizing: border-box;
	box-shadow: 0 0 25vmin 5vmin #ffa500, 0 0 1vmin 5vmin #ffa500;
	filter: blur(2px);
}

.sun:after {
	content: "";
	position: absolute;
	width: calc(100% + 18vmin);
	height: calc(100% + 18vmin);
	left: -9vmin;
	top: -9vmin;
	background: radial-gradient(circle at 75% 65%, #fe0d -5%, #ff00 50%), radial-gradient(circle at 60% 25%, #fe0d -5%, #ffa500 60%);
	border-radius: 100%;
	filter: blur(3px);
	box-shadow: 0 0 4vmin 3vmin #f908,  0 0 5vmin 3vmin #ffa500 inset;
}

.sun-rays {
	position: absolute;
	width: 80vmin;
	height: 80vmin;
	border-radius: 100%;
	left: -20vmin;
	top: -20vmin;
	display: flex;
	justify-content: center;
	animation: spin 240s linear 0s infinite, shine 5s ease 0s infinite alternate;
}


span {
	position: absolute;
	background: conic-gradient(
		from 170deg at 50% 0, 
		#fff0 0deg, 
		#ffa500 2deg 18deg, 
		#fff0 20deg 359deg, 
		#fff0 360deg);
	width:15vmin;
	height: 50%;
	transform-origin: center bottom;
	filter:
		drop-shadow(3.5vmin 7.5vmin 0vmin #ff9c00)
		drop-shadow(-4vmin 8vmin 0vmin #ff9c00)
		drop-shadow(2.5vmin 5vmin 0vmin #ff9c00) 
		drop-shadow(-2.5vmin 4vmin 0vmin #ff9c00) 
		drop-shadow(0vmin -15vmin 0.95vmin #ffffff05) 
		drop-shadow(0vmin -30vmin 0.75vmin #ffffff05);
}


span {
	@for $i from 1 through 36 {
		&:nth-child(#{$i}) {
			transform: rotate($i * 15deg);
		}
	}
}

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

@keyframes shine {
	100% {
		width: 90vmin;
		height: 90vmin;
		left: -25vmin;
		top: -25vmin;
	}
}
!

JS
!
999px

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