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.
In CodePen, whatever you write in the HTML editor is what goes within the <body>
tags in a basic HTML5 template. So you don't have access to higher-up elements like the <html>
tag. If you want to add classes there that can affect the whole document, this is the place to do it.
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.
The resource you are linking to is using the 'http' protocol, which may not work when the browser is using https.
CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.
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.
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).
Any URLs added here will be added as <link>
s in order, and before the CSS in the editor. You can use the CSS from another Pen by using its URL and the proper URL extension.
You can apply CSS to your Pen from any stylesheet on the web. Just put a URL to it here and we'll apply it, in the order you have them, before the CSS in the Pen itself.
You can also link to another Pen here (use the .css
URL Extension) and we'll pull the CSS from that Pen and include it. If it's using a matching preprocessor, use the appropriate URL Extension and we'll combine the code before preprocessing, so you can use the linked Pen as a true dependency.
JavaScript preprocessors can help make authoring JavaScript easier and more convenient.
Babel includes JSX processing.
Any URL's added here will be added as <script>
s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.
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.
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.
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.
All packages are different, so refer to their docs for how they work.
If you're using React / ReactDOM, make sure to turn on Babel for the JSX processing.
If active, Pens will autosave every 30 seconds after being saved once.
If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.
If enabled, your code will be formatted when you actively save your Pen. Note: your code becomes un-folded during formatting.
Visit your global Editor Settings.
<body>
<div class="gps-button-wrapper">
<a class="gps-button" href="#">Subtle Glowing Button Test</a>
</div>
<p>Contrary to popular belief, Lorem Ipsum is not simply random text. It has roots in a piece of classical Latin literature from 45 BC, making it over 2000 years old. Richard McClintock, a Latin professor at Hampden-Sydney College in Virginia, looked up one of the more obscure Latin words, consectetur, from a Lorem Ipsum passage, and going through the cites of the word in classical literature, discovered the undoubtable source. Lorem Ipsum comes from sections 1.10.32 and 1.10.33 of "de Finibus Bonorum et Malorum" (The Extremes of Good and Evil) by Cicero, written in 45 BC. This book is a treatise on the theory of ethics, very popular during the Renaissance. The first line of Lorem Ipsum, "Lorem ipsum dolor sit amet..", comes from a line in section 1.10.32.</p>
<p>The standard chunk of Lorem Ipsum used since the 1500s is reproduced below for those interested. Sections 1.10.32 and 1.10.33 from "de Finibus Bonorum et Malorum" by Cicero are also reproduced in their exact original form, accompanied by English versions from the 1914 translation by H. Rackham.</p>
<div class="gps-button-wrapper">
<a class="gps-button" href="#" data-aos="fade-up">Surprise Button!</a>
</div>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Quisque sem lorem, maximus sit amet erat a, gravida commodo augue. Orci varius natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Etiam quis rhoncus diam, et molestie libero. Pellentesque finibus ornare ligula condimentum sagittis. Morbi nec turpis molestie, consectetur arcu nec, ultrices leo. Quisque urna lorem, luctus sit amet nunc ac, volutpat finibus metus. Donec diam neque, sodales nec mauris et, volutpat finibus ipsum. Sed sed luctus diam. Vivamus cursus auctor vehicula. Pellentesque viverra, sapien in vehicula convallis, felis massa pulvinar elit, eget tempor est ante accumsan sapien. Sed sit amet pulvinar eros.</p>
<p>Aliquam aliquam nisl ut purus placerat, eget ultricies ligula suscipit. In tincidunt ut eros nec porta. Quisque in ex urna. Nulla at porttitor massa, sit amet pretium tortor. Nam lobortis a tellus vitae suscipit. Sed convallis ultricies metus imperdiet consequat. Integer pharetra orci leo, et vestibulum sapien hendrerit at. Morbi volutpat ex felis, aliquam maximus nibh pretium et. Donec vitae eros id elit rhoncus malesuada. Duis ullamcorper malesuada ligula, ac dapibus nisi commodo vitae.</p>
<p class="credit">
This on-scroll animation uses Michał Sajnóg's AOS Animate on Scroll Library available <a href="http://michalsnik.github.io/aos/" target="_blank">on Github</a>. To learn more, <a href="https://github.com/michalsnik/aos" target="_blank">read the documentation</a>.
</p>
</body>
/* General Formatting
------------------------*/
body {
background-color: ##f1efed;
max-width: 900px;
margin: 75px auto;
}
p {
color: #333;
font: 15px/1.45 Open Sans;
margin: 0 auto 1.45em;
max-width: 70ch;
}
.gps-button-wrapper {
text-align: center;
margin: 50px auto;
}
/* BUTTON STYLES
------------------------*/
.gps-button-wrapper .gps-button {
background-color: #fd2c5a;
display: inline-block;
color: #fff;
font: bold 30px/1.25 "Raleway", Helvetica, Arial, sans-serif;
text-decoration: none;
padding: 15px 35px;
position: relative;
overflow: hidden;
border-radius: 100px;
animation: glow-effect 1.5s linear infinite alternate;
}
@keyframes glow-effect {
0% {
box-shadow: 0 0 35px 15px pink, 0 0 35px pink;
background-color: #fd2c5a;
}
100% {
box-shadow: 0 0 35px pink;
background-color: #ff174a;
}
}
.gps-button-wrapper .gps-button {
background: linear-gradient(55deg, #ff174a 15%, #ff5a7e 37%, #ff174a 40%) center right / 300% 100% no-repeat;
transition: all .75s ease-in-out;
}
.gps-button-wrapper .gps-button:hover {
background-position: center left;
}
/* SCROLL ANIMATION
------------------------*/
[data-aos^=fade] {
opacity: 0;
transition-property: opacity, transform
}
[data-aos^=fade].aos-animate {
opacity: 1;
transform: translate(0)
}
[data-aos=fade-up] {
transform: translateY(50px)
}
/* CREDIT PARAGRAPH STYLE
----------------------------*/
p.credit {
border-top: 2px solid #111;
padding-top: 10px;
font-style: italic;
font-weight: bold;
max-width: 73ch;
}
AOS.init({
duration: 1200
});
Also see: Tab Triggers