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HTML

About HTML Preprocessors

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

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.

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

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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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HTML 

              
                <div class="background">
</div>

<article class="wrapper">
  <header>
    <h1 class="pageTitle">Parallax scrolling</h1>
    <h2 class="pageSubTitle">With a little bit of jQuery</h2>
  </header>
  <section>
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Donec volutpat tortor a turpis mattis, in blandit orci venenatis. Quisque justo lacus, rutrum mattis tortor et, aliquam auctor risus. Mauris quis elit turpis. Morbi non nisl nunc. Duis elit quam, lobortis eget pretium sed, eleifend eu dui. Sed molestie ornare suscipit. Phasellus facilisis at quam sed tincidunt. Phasellus eget odio laoreet, dictum augue ac, dictum lorem. Nulla facilisi. Phasellus elit augue, cursus eu ante nec, vestibulum adipiscing mi. Nunc adipiscing nibh risus, sed auctor sapien sodales in. Morbi in purus diam. In id consequat velit, eget sodales enim. Nam a massa sed orci blandit interdum eget et ligula. Pellentesque laoreet semper vulputate.</p>

    <p>Proin laoreet molestie mi ac mattis. Curabitur velit lorem, euismod eget leo sed, imperdiet ullamcorper mauris. Fusce posuere dapibus eros. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed ullamcorper massa lectus, et tempor orci dapibus non. Pellentesque id enim commodo, scelerisque augue in, pharetra purus. Donec leo odio, consequat non tellus tincidunt, rhoncus porta urna.</p>

    <p>Aenean tincidunt sed metus et mollis. Pellentesque tristique risus ac suscipit ornare. Sed a tempor nisl. Nam imperdiet mauris vel nunc varius, id volutpat elit porta. Etiam eu consectetur dui. Interdum et malesuada fames ac ante ipsum primis in faucibus. Aenean sollicitudin fermentum nulla, eu ultricies orci imperdiet sed. Cras vitae quam blandit quam volutpat tincidunt vel vel quam. Ut id dictum nisl, nec commodo augue. Donec sed imperdiet arcu, nec ullamcorper ante. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos. Duis id egestas est. Pellentesque eleifend, nisi quis eleifend blandit, lacus ligula tempus quam, non sagittis eros tortor vel massa. Duis posuere pellentesque arcu in sollicitudin.</p>
  </section>
</article>

<article class="wrapper">
  <header>
    <h1 class="pageTitle">Another title</h1>
    <h2 class="pageSubTitle">With just another subtitle</h2>
  </header>
  <section>
    <p>Proin laoreet molestie mi ac mattis. Curabitur velit lorem, euismod eget leo sed, imperdiet ullamcorper mauris. Fusce posuere dapibus eros. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed ullamcorper massa lectus, et tempor orci dapibus non. Pellentesque id enim commodo, scelerisque augue in, pharetra purus. Donec leo odio, consequat non tellus tincidunt, rhoncus porta urna.</p>

    <p>Aenean tincidunt sed metus et mollis. Pellentesque tristique risus ac suscipit ornare. Sed a tempor nisl. Nam imperdiet mauris vel nunc varius, id volutpat elit porta. Etiam eu consectetur dui. Interdum et malesuada fames ac ante ipsum primis in faucibus. Aenean sollicitudin fermentum nulla, eu ultricies orci imperdiet sed. Cras vitae quam blandit quam volutpat tincidunt vel vel quam. Ut id dictum nisl, nec commodo augue. Donec sed imperdiet arcu, nec ullamcorper ante. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos. Duis id egestas est. Pellentesque eleifend, nisi quis eleifend blandit, lacus ligula tempus quam, non sagittis eros tortor vel massa. Duis posuere pellentesque arcu in sollicitudin.</p>
  </section>
</article>

<article class="wrapper">
  <header>
    <h1 class="pageTitle">Again another title</h1>
    <h2 class="pageSubTitle">And again another subtitle</h2>
  </header>
  <section>
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Donec volutpat tortor a turpis mattis, in blandit orci venenatis. Quisque justo lacus, rutrum mattis tortor et, aliquam auctor risus. Mauris quis elit turpis. Morbi non nisl nunc. Duis elit quam, lobortis eget pretium sed, eleifend eu dui. Sed molestie ornare suscipit. Phasellus facilisis at quam sed tincidunt. Phasellus eget odio laoreet, dictum augue ac, dictum lorem. Nulla facilisi. Phasellus elit augue, cursus eu ante nec, vestibulum adipiscing mi. Nunc adipiscing nibh risus, sed auctor sapien sodales in. Morbi in purus diam. In id consequat velit, eget sodales enim. Nam a massa sed orci blandit interdum eget et ligula. Pellentesque laoreet semper vulputate.</p>

    <p>Proin laoreet molestie mi ac mattis. Curabitur velit lorem, euismod eget leo sed, imperdiet ullamcorper mauris. Fusce posuere dapibus eros. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed ullamcorper massa lectus, et tempor orci dapibus non. Pellentesque id enim commodo, scelerisque augue in, pharetra purus. Donec leo odio, consequat non tellus tincidunt, rhoncus porta urna.</p>

    <p>Aenean tincidunt sed metus et mollis. Pellentesque tristique risus ac suscipit ornare. Sed a tempor nisl. Nam imperdiet mauris vel nunc varius, id volutpat elit porta. Etiam eu consectetur dui. Interdum et malesuada fames ac ante ipsum primis in faucibus. Aenean sollicitudin fermentum nulla, eu ultricies orci imperdiet sed. Cras vitae quam blandit quam volutpat tincidunt vel vel quam. Ut id dictum nisl, nec commodo augue. Donec sed imperdiet arcu, nec ullamcorper ante. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos. Duis id egestas est. Pellentesque eleifend, nisi quis eleifend blandit, lacus ligula tempus quam, non sagittis eros tortor vel massa. Duis posuere pellentesque arcu in sollicitudin.</p>
  </section>
</article>
!

CSS 

              
                @import url(https://fonts.googleapis.com/css?family=Roboto:400,100,300,500,700,900);
@import url(https://fonts.googleapis.com/css?family=Titillium+Web:400,600,700,300,200);

body {
  font-family: 'Roboto', sans-serif;
  font-size: 14px;
  letter-spacing: 1px;
  line-height: 1.6em;
  font-weight: 300;
  color: #555;
}

p {
  margin-bottom: 2em;
}

header {
  border-bottom: solid 1px #e0e0e0;
  margin: 0 0 20px 0;
}

.pageTitle,
.pageSubTitle {
  font-family: 'Titillium', sans-serif;
  text-transform: uppercase;
  color: #333;
}

.pageTitle {
  color: #FF7600;
}

.pageTitle {
  font-size: 2em;
  font-weight: 700;
  line-height: 2em;
}

.pageSubTitle {
  margin-bottom: 1em;
  font-size: 1.4em;
  font-weight: 300;
}

.background {
  background: 
    url("http://img.talkandroid.com/uploads/2013/03/htc-sense-5-wallpaper-3.jpg")
    repeat;
  background-size: 100% auto;
  position: fixed;
  width: 100%;
  height: 300%;
  top: 0;
  left: 0;
  z-index: -1
}

.wrapper {
  width: 520px;
  padding: 40px;
  margin: 20px auto;
  background: #fff;
  box-shadow:  0px 3px 3px 1px rgba(0, 0, 0, 0.25);
}

.slogan {
  position: fixed;
  display: block;
  top: 700px;
  width: 100%;
  padding: 20px 0;
  text-align: center;
  background: #222;
}

.sloganTitle {
  font-size: 70px;
  font-weight: 700;
  line-height: 80px;
  color: #fff;
  
  text-shadow: 0px 2px 1px rgba(0, 0, 0, 0.25);
}
!

JS 

              
                $(window).scroll(function(e){
  parallax();
});

function parallax(){
  var scrolled = $(window).scrollTop();
  $('.background').css('top',-(scrolled*0.15)+'px');
}
!
999px

Console