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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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About the <head>

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. If you need things in the <head> of the document, put that code here.

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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-.

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. For instance, CoffeeScript can help prevent easy-to-make mistakes and offer a cleaner syntax and Babel can bring ECMAScript 6 features to browsers that only support ECMAScript 5.

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Babel is required to process package imports. If you need a different preprocessor remove all packages first.

Add External Scripts/Pens

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About External Resources

You can apply a script from anywhere on the web to your Pen. Just put a URL to it here and we'll add it, in the order you have them, before the JavaScript in the Pen itself.

If the script you link to has the file extension of a preprocessor, we'll attempt to process it before applying.

You can also link to another Pen here, and we'll pull the JavaScript from that Pen and include it. If it's using a matching preprocessor, we'll combine the code before preprocessing, so you can use the linked Pen as a true dependency.

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HTML 

              
                body
	header.header
		// Fake logo markup, see article for real markup
		a.logo(href="#" title="Go to home page") Logo

		nav.primary-nav(aria-label="Primary")
			ul
				- var i = 0;
				while i < 3
					-i++;
					li: a(href='#') Primary nav

		form.search(role="search" aria-label="site")
			label
				span Search
				input(type="search")
			button(type="submit") Submit

	nav.secondary-nav(aria-label="Secondary")
		ul
			- var i = 0;
			while i < 5
				-i++;
				li: a(href='#') Secondary nav		

	main
		article
			h1 Main article heading

			p Lorem ipsum dolor sit amet, consectetur adipiscing elit. Quae sunt igitur communia vobis cum antiquis, iis sic utamur quasi concessis; Nihil acciderat ei, quod nollet, nisi quod anulum, quo delectabatur, in mari abiecerat. Unum est sine dolore esse, alterum cum voluptate. Laboro autem non sine causa; Theophrasti igitur, inquit, tibi liber ille placet de beata vita? Nihil opus est exemplis hoc facere longius. Duo Reges constructio interrete. Graecum enim hunc versum nostis omnes Suavis laborum est praeteritorum memoria. Haec et tu ita posuisti, et verba vestra sunt.

			h2 Article secondary heading

			p Nos commodius agimus. A mene tu? Tantum dico, magis fuisse vestrum agere Epicuri diem natalem, quam illius testamento cavere ut ageretur. Tenesne igitur, inquam, Hieronymus Rhodius quid dicat esse summum bonum, quo putet omnia referri oportere? Nihilo beatiorem esse Metellum quam Regulum. Sed quanta sit alias, nunc tantum possitne esse tanta. Philosophi autem in suis lectulis plerumque moriuntur. Esse enim, nisi eris, non potes.

			p Sunt enim quasi prima elementa naturae, quibus ubertas orationis adhiberi vix potest, nec equidem eam cogito consectari. Id Sextilius factum negabat. Quorum sine causa fieri nihil putandum est. Quae autem natura suae primae institutionis oblita est?

	aside(aria-label="Sidebar")
		section.share
			h2 Share
			ul
				li
					a(href='#') Facebook
				li
					a(href='#') Twitter
				li
					a(href='#') Email

		section.recommended
			h2 Recommended
			ul
				li
					article
						h3
							a(href='#') Related article
						p Article description
				li
					article
						h3
							a(href='#') Related article
						p Article description

	footer
		ul
			- var i = 0;
			while i < 5
				-i++;
				li: a(href='#') Footer link
!

CSS 

              
                
.visually-hidden {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}


body {
	max-width: 120ch;
	min-width: 800px;
	margin: 20px auto;
	padding: 20px;
	padding-bottom: 0;
	
	display: grid;
	grid-template:
		"header  header  header"
		"divider divider divider"
		"nav     main    sidebar"
		"footer  footer  footer" /
		 200px    1fr    200px;
	grid-gap: 20px 40px;
	
	&::before {
		content: '';
		display: block;
		grid-area: divider;
		border-bottom: 1px dashed #000;
	}
	
	> header {
		grid-area: header;
	}
}

.header {
	display: grid;
	grid-template: 
		"logo ........... ......" 1fr
		"logo primary-nav search" auto
		"logo ........... ......" 1fr /
		200px 1fr         200px;
	grid-gap: 0 40px;
}

.primary-nav {
	grid-area: primary-nav;
	display: flex;

	ul {
		flex-grow: 1;
		display: flex;
		list-style: none;
		padding: 0;
		margin-left: -20px;
	}
		
	li {
		margin-left: 20px;
		flex-grow: 1;
		display: flex;
		text-align: center;
	}
		
	a {
		display: flex;
		align-items: center;
		justify-content: center;
		width: 100%;
		background-color: #000;
		color: #fff;
		text-decoration: none;
		padding: 10px 20px;
	}
}

.logo {
	grid-area: logo;
	border: 3px solid #000;
	padding: 10px 20px;
	font-size: 2em;
	margin: 0;
	text-align: center;
	text-decoration: none;
	color: #000;
}

.search {
	grid-area: search;
	display: flex;
	align-items: flex-end;
	
	input {
		width: 100%;
	}
}

.secondary-nav {
	grid-area: nav;
	background-color: lightgray;
	padding: 20px;
	flex-grow: 1;

	
	ul {
		list-style: none;
		padding: 0;
		display: grid;
		width: 100%;
		grid-template-columns: 1fr;
		grid-gap: 10px;
	}
	
	li {
		display: flex;
		width: 100%;
	}
	
	a {
		background: #fff;
		flex-grow: 1;
		display: flex;
		align-items: center;
		justify-content: center;
		color: #000;
		text-decoration: none;
		font-weight: bold;
		padding: 28px 0;
	}
	
}

main {
	grid-area: main;
	
	p {
		&:last-child {
			margin-bottom: 0;
		}
	}
}

aside {
	grid-area: sidebar;
	background: lightgray;
	padding: 20px;
	
	section {
		margin-bottom: 2.5em;
	}
	
	h2 {
		margin: 0;
		margin-bottom: 0.5em;
		font-size: 1.2em;
	}
}

.share {
	ul {
		background: #fff;
		padding-top: 5px;
		padding-bottom: 15px;
	}
	li {
		margin-top: 0.5em;
	}
}

.recommended {
	ul {
		list-style: none;
		padding: 0;
	}
	li {
		background: #fff;
		padding: 10px;
		margin-top: 10px;
	}
	h3 {
		margin: 0;
		margin-bottom: 0.5em;
	}
	p {
		margin: 0;
	}
}

footer {
	grid-area: footer;
	padding: 20px;
	border-top: 1px dashed #000;
	margin-top: 20px;
	
	ul {
		display: block;
		list-style: none;
		padding: 0;
		text-align: center;
	}
	
	li {
		display: inline-block;
		margin-left: 10px;
	}
	
	a {
		color: #000;
		text-decoration: none;
	}
}

h1 {
	margin: 0;
	font-size: 2.5em;
}

h2 {
	font-size: 1.5em;
}

ul {
	margin: 0;
}

a {
	color: #000;
}
!

JS
!
999px

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