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HTML

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About the <head>

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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.

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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-.

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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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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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HTML 

              
                <body>
  <div class="page">
    <div class="intro-header">
      <div class="bg-image parallax-bg"></div>
      <div class="header-content row">
        <h1>Majestic Title</h1>
        <h2>An awesome subtitle</h2>
      </div>
    </div>
    <div class="content">
      <div class="row">
          <p>
          Lorem ipsum dolor sit amet, consectetur adipisicing elit. Labore hic ipsum quam est et asperiores recusandae deleniti voluptatem maxime dignissimos sapiente quisquam maiores modi dolorum ipsa id accusantium, alias, voluptate.
          </p>
          <p>
            Lorem ipsum dolor sit amet, consectetur adipisicing elit. Aspernatur cumque delectus magni hic consequuntur ipsum, itaque atque laudantium sequi odio impedit tenetur, ipsam debitis modi dolore? Veniam ad laudantium fugiat!
          </p>
          <p>
            Lorem ipsum dolor sit amet, consectetur adipisicing elit. Consectetur eaque, sunt aliquam quasi obcaecati non in corporis necessitatibus est ab consequuntur cum quaerat nihil quod, odio dolor aut, dolore labore!
          </p>
        </div>
    </div>
  </div>
</body>
!

CSS 

              
                @import url(https://fonts.googleapis.com/css?family=Leckerli+One);
@import url(https://fonts.googleapis.com/css?family=Open+Sans);

body {
  padding: 0;
  margin: 0;
  height: 100%;
  font-family: 'Open Sans', sans-serif;
  color: #fff;
}
h1, h2 { 
  margin: 0; 
  font-family: 'Leckerli One', cursive;
  text-shadow: 0 2px rgba(0,0,0,.5);
}

.row {
  max-width: 80%;
  margin: 0 auto;
}

.intro-header {
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  width: 100%;
  display: table;
  z-index: -1;
  
   &:before {
       content: '';
       position: absolute;
       top: 0;
       left: 0;
       width: 100%;
       height: 100%;
       background: rgba(0,0,0,.3);
       z-index: 1;
    }
  
  .bg-image {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    background: url('http://cdn.magdeleine.co/wp-content/uploads/2015/02/YS4_5968_69_70-2-3-1400x933.jpg') center center no-repeat;
    background-size: cover;
  }
  
  .header-content {
    position: relative;
    text-align: center;
    display: table-cell;
    vertical-align: middle;
    z-index: 2;
  }
  
}

.content { 
  height: 100vh;
  padding: 50px;
  background: #333;
  margin-top: 100vh;
}
!

JS 

              
                var $parallaxElement = $('.parallax-bg');
var elementHeight = $parallaxElement.outerHeight();

function parallax() {
 
  var scrollPos = $(window).scrollTop();
  var transformValue = scrollPos/40;
  var opacityValue =  1 - ( scrollPos / 2000);
  var blurValue = Math.min(scrollPos / 100, 3);
  
  if ( scrollPos < elementHeight ) {
  
    $parallaxElement.css({
      'transform': 'translate3d(0, -' + transformValue + '%, 0)',
      'opacity': opacityValue,
      '-webkit-filter' : 'blur('+blurValue+'px)'
    });
    
  }
  
}


$(window).scroll(function() {
  parallax();
});
!
999px

Console