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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>

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.

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Babel includes JSX processing.

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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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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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About Packages

Using packages here is powered by Skypack, which makes packages from npm not only available on a CDN, but prepares them for native JavaScript ES6 import usage.

All packages are different, so refer to their docs for how they work.

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HTML 

              
                <div class="container">
	<div class="left"></div>
	<div class="right"></div>
	<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Placerat orci nulla pellentesque dignissim enim sit. Ut etiam sit amet nisl purus in mollis nunc. Donec et odio pellentesque diam volutpat commodo sed. Tortor at auctor urna nunc id cursus metus aliquam. Egestas integer eget aliquet nibh praesent. Montes nascetur ridiculus mus mauris vitae ultricies. Nunc aliquet bibendum enim facilisis gravida neque convallis a. Gravida neque convallis a cras semper auctor neque vitae tempus. Tortor pretium viverra suspendisse potenti nullam ac tortor vitae purus. Feugiat in fermentum posuere urna nec tincidunt praesent semper feugiat. Etiam dignissim diam quis enim lobortis. Tellus cras adipiscing enim eu turpis. Fames ac turpis egestas sed tempus urna et. Massa tincidunt dui ut ornare lectus sit amet. Eget sit amet tellus cras adipiscing enim eu turpis egestas. Aenean vel elit scelerisque mauris pellentesque pulvinar pellentesque. Phasellus egestas tellus rutrum tellus pellentesque eu tincidunt tortor.</p>
	<div class="shadow"></div>
</div>
<div class="shadow2"></div>
!

CSS 

              
                * {
	box-sizing: border-box;
}

body {
	background: repeating-linear-gradient(45deg, rebeccaPurple, rebeccaPurple 6px, #FFB74D 6px, #FFB74D 18px);
	min-height: 100vh;
	padding: 30px;
}

.container {
	background: linear-gradient(to top, rebeccaPurple, coral);
	height: 600px;
	clip-path: polygon(50% 0, 75% 50%, 50% 100%, 25% 50%);
	position: relative;
}

.left,
.right {
	shape-margin: 20px;
	position: relative;
	height: 600px;
	width: 50%;
}

.left {
	float: left;
	clip-path: polygon(0 0, 100% 0, 50% 50%, 100% 100%, 0 100%);
	shape-outside: polygon(0 0, 100% 0, 50% 50%, 100% 100%, 0 100%);
	transform: translate3d(-20px, 0, 0);
}

.right {
	float: right;
	clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%, 50% 50%);
	shape-outside: polygon(0 0, 100% 0, 100% 100%, 0 100%, 50% 50%);
	transform: translate3d(-20px, 0, 0);
}

.shadow {
	display: block;
	content: '';
	width: 100%;
	height: 100%;
	background: linear-gradient(to bottom, rgba(rebeccaPurple, 0.2), darken(blue, 9%));
	position: absolute;
	top: 0;
	left: 0;
	transform: translate3d(0, 50%, 0);
	clip-path: circle(200px);
	height: 600px;
}

.shadow2 {
	display: block;
	content: '';
	width: 100%;
	height: 600px;
	background-color: rebeccaPurple;
	position: absolute;
	top: 0;
	left: 0;
	z-index: -1;
	transform: translate3d(0, 80px, 0);
	clip-path: polygon(50% 0, 75% 50%, 50% 100%, 25% 50%);
	height: 600px;
}
!

JS
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999px

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