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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.

!
Insecure Resource

The resource you are linking to is using the 'http' protocol, which may not work when the browser is using https.

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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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 

              
                <header>
	<div class="logo">Logo</div>
	<div class="description"><div>position sticky not working.</div></div>
</header>
<div class="navbar">
	position sticky working!
	<ul>
		<li><a href="#">navitem1</a></li>
		<li><a href="#">navitem2</a></li>
		<li><a href="#">navitem3</a></li>
		<li><a href="#">navitem4</a></li>
	</ul>
</div>



<div class="main">
	<div>Lorem, ipsum dolor sit amet consectetur adipisicing elit. Dolorem, ab. Aliquam alias maxime laboriosam harum at perspiciatis labore, molestiae veniam culpa voluptatem nisi, nam, possimus fuga commodi tempora unde eius officia. Sunt, soluta. Ratione nesciunt harum itaque blanditiis obcaecati laudantium nulla excepturi, suscipit reprehenderit! Iste doloremque voluptatem dicta, eum ex minus aperiam officiis deserunt qui? Labore nobis temporibus libero adipisci quidem repudiandae voluptate aliquid veritatis rem sunt, sapiente aspernatur, exercitationem, nemo maiores! Voluptatibus magni officiis quisquam, laudantium dolorem, iure omnis accusamus reiciendis magnam nam voluptate asperiores? Id, tenetur. Pariatur ipsam quos voluptatum iusto omnis eum inventore corrupti cupiditate unde necessitatibus molestias ipsa id impedit veritatis nesciunt quod molestiae rerum mollitia, magni dignissimos quisquam modi recusandae eius expedita? Veniam repudiandae aspernatur, adipisci amet voluptate dolore consectetur rerum voluptates quaerat dignissimos molestias corporis illo accusamus natus nobis officiis, vero fuga sint sunt? Excepturi molestiae minus vitae, optio adipisci sequi consequatur explicabo sunt officia. Nemo fugiat sapiente eius quibusdam possimus, consectetur, sunt facere ipsa aut delectus, impedit doloremque! Ducimus nostrum recusandae voluptatibus qui ea sequi itaque vel quia aut facere, impedit dignissimos laudantium quo veniam earum veritatis eveniet at exercitationem magni vero iusto? Tempora aliquid, quaerat rem libero esse, voluptas enim expedita facere molestiae fuga eligendi voluptatibus repellat! Porro qui optio eos aspernatur ipsa reiciendis officia? Sed accusamus molestias omnis voluptas, illum assumenda deserunt ipsa expedita placeat pariatur nam eligendi voluptate, fugiat eum voluptates! Sequi eaque odit fugit rem quaerat error ut impedit aut! Minima minus incidunt voluptas reiciendis ullam. Necessitatibus cupiditate ullam quod mollitia deleniti quia quae ratione amet vitae laborum dolorum sapiente explicabo praesentium voluptas error modi, blanditiis fugiat ex magnam possimus? Aspernatur unde suscipit accusantium repellendus sed beatae necessitatibus illo in velit ea veritatis, quod ducimus cupiditate magni aut, dignissimos quidem nulla, quis quas nisi ex totam dolores dolorem possimus! Similique numquam delectus perferendis temporibus saepe? Alias possimus omnis reiciendis, nam dolorum corporis. Culpa id sed laudantium fugiat mollitia amet expedita cumque, est perferendis ullam possimus enim corrupti, tenetur debitis inventore? Officia eius asperiores sed libero atque ipsam quia iusto delectus dolorum corporis, consequatur culpa eveniet nesciunt laudantium tempora quis autem error ea ad fugit voluptates cum beatae fugiat accusantium? Quam laboriosam, quod quidem officiis sit saepe. Officiis similique dignissimos, placeat sapiente ullam soluta suscipit temporibus ipsam aperiam dolor! Distinctio, rerum repellendus numquam culpa voluptatibus animi molestiae doloremque. Nam beatae itaque culpa quod expedita libero necessitatibus rerum recusandae, earum voluptatibus repellendus unde in magni non ratione totam dicta obcaecati ipsa nulla iure officiis laudantium sit sapiente! Quis facilis nisi iure, voluptate optio commodi incidunt ipsa nihil eum hic nostrum natus atque eius minima voluptates quidem fuga saepe accusamus voluptas, provident error ex adipisci. Veniam possimus hic cupiditate sapiente tempore perferendis, ullam, numquam pariatur iure unde, amet quis dicta harum? Nostrum, labore? Necessitatibus ex blanditiis enim dicta suscipit eligendi libero sapiente architecto, id error ipsa exercitationem, vel autem ratione expedita molestias laboriosam dolores consequatur. Sit blanditiis natus dolor. Quaerat excepturi fugit minima accusamus voluptates debitis? Ratione totam temporibus voluptate aperiam quod!</div>
</div>
!

CSS 

              
                .navbar {
  background: #B8C1C8;
  border-bottom: 1px solid #989EA4;
  border-top: 1px solid #717D85;
  color: #FFF;
  margin: 0;
  padding: 2px 0 0 12px;
  position: -webkit-sticky;
  position: sticky;
  top: -1px;
}

.description {
  background: #B8C1C8;
  border-bottom: 1px solid #989EA4;
  border-top: 1px solid #717D85;
  color: #FFF;
  margin: 0;
  padding: 2px 0 0 12px;
  position: -webkit-sticky;
  position: sticky;
  top: -1px;
}
!

JS
!
999px

Console