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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.

Learn more · Versions

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

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.

Learn more · Versions

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).

Add External Stylesheets/Pens

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.

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About External Resources

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.

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+ add another resource

JavaScript

About JavaScript Preprocessors

JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

Learn more · Versions

Babel includes JSX processing.

Add External Scripts/Pens

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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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+ add another resource

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 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.

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HTML 

              
                <div class="scroll-block" data-bg="#eeeeee">
  <div class="scroll-block--left">
    <div class="sticky-block">
      <div class="content">
        <h1>About Us Section</h1>
        <h2>Sub-Head Copy</h2>
      </div>
      <div class="page-letters">Ab</div>
    </div>
  </div>
  <div class="scroll-block--right">
    <div class="bg-img" style="background-image: url(https://picsum.photos/g/1000/1600?random
);"></div>
    <div class="scroll-block--content">
      <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Praesent maximus eros ut velit sodales fermentum. Etiam eu eros magna. Fusce gravida libero a aliquet ultricies. Phasellus id mauris sem. Aliquam ut augue rhoncus augue cursus gravida
        a ac nibh. Suspendisse consequat pulvinar semper. Duis tellus nisi, tincidunt quis sapien eu, iaculis porttitor purus. Aliquam venenatis felis ut facilisis lobortis. Curabitur vitae nibh feugiat, posuere nisl eu, accumsan quam.</p>
      <p>Quisque tempor sem arcu, ut elementum nisl interdum vel. Fusce hendrerit nisi nisl, ut sagittis neque varius nec. In hac habitasse platea dictumst. Phasellus sit amet tempor neque. Nullam pellentesque, enim ut efficitur facilisis, tellus ex
        iaculis odio, id efficitur diam lectus ac sem. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos. Aenean elementum aliquet aliquet.</p>
      <p>In eleifend mi vel egestas aliquam. Praesent malesuada dolor at nisi blandit mattis. Proin pharetra mauris auctor est bibendum vulputate. Sed suscipit mollis urna eget dignissim. Proin non orci nec urna semper facilisis id vel quam. Donec
        at risus ac tortor varius aliquet. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras in luctus lectus. Sed dictum commodo eros maximus facilisis.</p>
      <p>Praesent at malesuada felis. Donec feugiat ligula fringilla efficitur consequat. Phasellus accumsan erat arcu, vitae imperdiet enim vehicula sit amet. Curabitur sagittis hendrerit facilisis. Phasellus faucibus venenatis turpis, vel sagittis
        velit laoreet et. In blandit ultrices vulputate. Aenean faucibus nulla id velit luctus, non pharetra felis sodales. Vivamus at ullamcorper enim. Phasellus at elementum metus. Donec quis viverra dui. Nam porttitor nisl sed lorem venenatis
        fermentum.</p>
      <p>Fusce eget scelerisque massa. Donec in cursus sem. Nunc non leo nunc. Aliquam ullamcorper est ac erat accumsan bibendum. Curabitur mauris libero, elementum non laoreet id, blandit nec ex. Vivamus hendrerit facilisis ultrices. Nullam
        consequat dapibus ipsum, ac mollis nulla hendrerit ac. Proin in magna vel odio porttitor accumsan id non massa. Nam iaculis risus eget neque convallis interdum. Morbi aliquam magna eu luctus maximus. Duis eu congue enim. Curabitur interdum
        risus sed erat suscipit posuere. Ut quis rhoncus nisl, a rhoncus massa. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas.</p>
      <p>In eleifend mi vel egestas aliquam. Praesent malesuada dolor at nisi blandit mattis. Proin pharetra mauris auctor est bibendum vulputate. Sed suscipit mollis urna eget dignissim. Proin non orci nec urna semper facilisis id vel quam. Donec
        at risus ac tortor varius aliquet. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras in luctus lectus. Sed dictum commodo eros maximus facilisis.</p>
      <p>Praesent at malesuada felis. Donec feugiat ligula fringilla efficitur consequat. Phasellus accumsan erat arcu, vitae imperdiet enim vehicula sit amet. Curabitur sagittis hendrerit facilisis. Phasellus faucibus venenatis turpis, vel sagittis
        velit laoreet et. In blandit ultrices vulputate. Aenean faucibus nulla id velit luctus, non pharetra felis sodales. Vivamus at ullamcorper enim. Phasellus at elementum metus. Donec quis viverra dui. Nam porttitor nisl sed lorem venenatis
        fermentum.</p>
      <p>Fusce eget scelerisque massa. Donec in cursus sem. Nunc non leo nunc. Aliquam ullamcorper est ac erat accumsan bibendum. Curabitur mauris libero, elementum non laoreet id, blandit nec ex. Vivamus hendrerit facilisis ultrices. Nullam
        consequat dapibus ipsum, ac mollis nulla hendrerit ac. Proin in magna vel odio porttitor accumsan id non massa. Nam iaculis risus eget neque convallis interdum. Morbi aliquam magna eu luctus maximus. Duis eu congue enim. Curabitur interdum
        risus sed erat suscipit posuere. Ut quis rhoncus nisl, a rhoncus massa. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas.</p>
    </div>
  </div>
</div>

<div class="scroll-block" data-bg="#ebeff2">
  <div class="scroll-block--left">
    <div class="sticky-block">
      <div class="content">
        <h1>Floor Plans Section</h1>
        <h2>Sub-Head Copy</h2>
      </div>
      <div class="page-letters">Fl</div>
    </div>
  </div>
  <div class="scroll-block--right">
    <div class="bg-img" style="background-image: url(https://picsum.photos/g/1000/1600?image=5);"></div>
    <div class="scroll-block--content">
      <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Praesent maximus eros ut velit sodales fermentum. Etiam eu eros magna. Fusce gravida libero a aliquet ultricies. Phasellus id mauris sem. Aliquam ut augue rhoncus augue cursus gravida
        a ac nibh. Suspendisse consequat pulvinar semper. Duis tellus nisi, tincidunt quis sapien eu, iaculis porttitor purus. Aliquam venenatis felis ut facilisis lobortis. Curabitur vitae nibh feugiat, posuere nisl eu, accumsan quam.</p>
      <p>Quisque tempor sem arcu, ut elementum nisl interdum vel. Fusce hendrerit nisi nisl, ut sagittis neque varius nec. In hac habitasse platea dictumst. Phasellus sit amet tempor neque. Nullam pellentesque, enim ut efficitur facilisis, tellus ex
        iaculis odio, id efficitur diam lectus ac sem. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos. Aenean elementum aliquet aliquet.</p>
      <p>In eleifend mi vel egestas aliquam. Praesent malesuada dolor at nisi blandit mattis. Proin pharetra mauris auctor est bibendum vulputate. Sed suscipit mollis urna eget dignissim. Proin non orci nec urna semper facilisis id vel quam. Donec
        at risus ac tortor varius aliquet. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras in luctus lectus. Sed dictum commodo eros maximus facilisis.</p>
      <p>Praesent at malesuada felis. Donec feugiat ligula fringilla efficitur consequat. Phasellus accumsan erat arcu, vitae imperdiet enim vehicula sit amet. Curabitur sagittis hendrerit facilisis. Phasellus faucibus venenatis turpis, vel sagittis
        velit laoreet et. In blandit ultrices vulputate. Aenean faucibus nulla id velit luctus, non pharetra felis sodales. Vivamus at ullamcorper enim. Phasellus at elementum metus. Donec quis viverra dui. Nam porttitor nisl sed lorem venenatis
        fermentum.</p>
      <p>Fusce eget scelerisque massa. Donec in cursus sem. Nunc non leo nunc. Aliquam ullamcorper est ac erat accumsan bibendum. Curabitur mauris libero, elementum non laoreet id, blandit nec ex. Vivamus hendrerit facilisis ultrices. Nullam
        consequat dapibus ipsum, ac mollis nulla hendrerit ac. Proin in magna vel odio porttitor accumsan id non massa. Nam iaculis risus eget neque convallis interdum. Morbi aliquam magna eu luctus maximus. Duis eu congue enim. Curabitur interdum
        risus sed erat suscipit posuere. Ut quis rhoncus nisl, a rhoncus massa. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas.</p>
    </div>
  </div>
</div>

<div class="normal-content">
  <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Praesent maximus eros ut velit sodales fermentum. Etiam eu eros magna. Fusce gravida libero a aliquet ultricies. Phasellus id mauris sem. Aliquam ut augue rhoncus augue cursus gravida a
    ac nibh. Suspendisse consequat pulvinar semper. Duis tellus nisi, tincidunt quis sapien eu, iaculis porttitor purus. Aliquam venenatis felis ut facilisis lobortis. Curabitur vitae nibh feugiat, posuere nisl eu, accumsan quam.</p>
  <p>Quisque tempor sem arcu, ut elementum nisl interdum vel. Fusce hendrerit nisi nisl, ut sagittis neque varius nec. In hac habitasse platea dictumst. Phasellus sit amet tempor neque. Nullam pellentesque, enim ut efficitur facilisis, tellus ex
    iaculis odio, id efficitur diam lectus ac sem. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos. Aenean elementum aliquet aliquet.</p>
  <p>In eleifend mi vel egestas aliquam. Praesent malesuada dolor at nisi blandit mattis. Proin pharetra mauris auctor est bibendum vulputate. Sed suscipit mollis urna eget dignissim. Proin non orci nec urna semper facilisis id vel quam. Donec at
    risus ac tortor varius aliquet. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras in luctus lectus. Sed dictum commodo eros maximus facilisis.</p>
  <p>Praesent at malesuada felis. Donec feugiat ligula fringilla efficitur consequat. Phasellus accumsan erat arcu, vitae imperdiet enim vehicula sit amet. Curabitur sagittis hendrerit facilisis. Phasellus faucibus venenatis turpis, vel sagittis
    velit laoreet et. In blandit ultrices vulputate. Aenean faucibus nulla id velit luctus, non pharetra felis sodales. Vivamus at ullamcorper enim. Phasellus at elementum metus. Donec quis viverra dui. Nam porttitor nisl sed lorem venenatis
    fermentum.</p>
  <p>Fusce eget scelerisque massa. Donec in cursus sem. Nunc non leo nunc. Aliquam ullamcorper est ac erat accumsan bibendum. Curabitur mauris libero, elementum non laoreet id, blandit nec ex. Vivamus hendrerit facilisis ultrices. Nullam consequat
    dapibus ipsum, ac mollis nulla hendrerit ac. Proin in magna vel odio porttitor accumsan id non massa. Nam iaculis risus eget neque convallis interdum. Morbi aliquam magna eu luctus maximus. Duis eu congue enim. Curabitur interdum risus sed erat
    suscipit posuere. Ut quis rhoncus nisl, a rhoncus massa. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas.</p>
</div>

<div class="scroll-block" data-bg="#E0E3E6">
  <div class="scroll-block--left">
    <div class="sticky-block">
      <div class="content">
        <h1>Amenities Section</h1>
        <h2>Sub-Head Copy</h2>
      </div>
      <div class="page-letters">Am</div>
    </div>
  </div>
  <div class="scroll-block--right">
    <div class="bg-img" style="background-image: url('https://picsum.photos/g/1000/1600??image=0');"></div>
    <div class="scroll-block--content">
      <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Praesent maximus eros ut velit sodales fermentum. Etiam eu eros magna. Fusce gravida libero a aliquet ultricies. Phasellus id mauris sem. Aliquam ut augue rhoncus augue cursus gravida
        a ac nibh. Suspendisse consequat pulvinar semper. Duis tellus nisi, tincidunt quis sapien eu, iaculis porttitor purus. Aliquam venenatis felis ut facilisis lobortis. Curabitur vitae nibh feugiat, posuere nisl eu, accumsan quam.</p>
      <p>Quisque tempor sem arcu, ut elementum nisl interdum vel. Fusce hendrerit nisi nisl, ut sagittis neque varius nec. In hac habitasse platea dictumst. Phasellus sit amet tempor neque. Nullam pellentesque, enim ut efficitur facilisis, tellus ex
        iaculis odio, id efficitur diam lectus ac sem. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos. Aenean elementum aliquet aliquet.</p>
      <p>In eleifend mi vel egestas aliquam. Praesent malesuada dolor at nisi blandit mattis. Proin pharetra mauris auctor est bibendum vulputate. Sed suscipit mollis urna eget dignissim. Proin non orci nec urna semper facilisis id vel quam. Donec
        at risus ac tortor varius aliquet. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras in luctus lectus. Sed dictum commodo eros maximus facilisis.</p>
      <p>Praesent at malesuada felis. Donec feugiat ligula fringilla efficitur consequat. Phasellus accumsan erat arcu, vitae imperdiet enim vehicula sit amet. Curabitur sagittis hendrerit facilisis. Phasellus faucibus venenatis turpis, vel sagittis
        velit laoreet et. In blandit ultrices vulputate. Aenean faucibus nulla id velit luctus, non pharetra felis sodales. Vivamus at ullamcorper enim. Phasellus at elementum metus. Donec quis viverra dui. Nam porttitor nisl sed lorem venenatis
        fermentum.</p>
      <p>Fusce eget scelerisque massa. Donec in cursus sem. Nunc non leo nunc. Aliquam ullamcorper est ac erat accumsan bibendum. Curabitur mauris libero, elementum non laoreet id, blandit nec ex. Vivamus hendrerit facilisis ultrices. Nullam
        consequat dapibus ipsum, ac mollis nulla hendrerit ac. Proin in magna vel odio porttitor accumsan id non massa. Nam iaculis risus eget neque convallis interdum. Morbi aliquam magna eu luctus maximus. Duis eu congue enim. Curabitur interdum
        risus sed erat suscipit posuere. Ut quis rhoncus nisl, a rhoncus massa. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas.</p>
      <p>Praesent at malesuada felis. Donec feugiat ligula fringilla efficitur consequat. Phasellus accumsan erat arcu, vitae imperdiet enim vehicula sit amet. Curabitur sagittis hendrerit facilisis. Phasellus faucibus venenatis turpis, vel sagittis
        velit laoreet et. In blandit ultrices vulputate. Aenean faucibus nulla id velit luctus, non pharetra felis sodales. Vivamus at ullamcorper enim. Phasellus at elementum metus. Donec quis viverra dui. Nam porttitor nisl sed lorem venenatis
        fermentum.</p>
      <p>Fusce eget scelerisque massa. Donec in cursus sem. Nunc non leo nunc. Aliquam ullamcorper est ac erat accumsan bibendum. Curabitur mauris libero, elementum non laoreet id, blandit nec ex. Vivamus hendrerit facilisis ultrices. Nullam
        consequat dapibus ipsum, ac mollis nulla hendrerit ac. Proin in magna vel odio porttitor accumsan id non massa. Nam iaculis risus eget neque convallis interdum. Morbi aliquam magna eu luctus maximus. Duis eu congue enim. Curabitur interdum
        risus sed erat suscipit posuere. Ut quis rhoncus nisl, a rhoncus massa. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas.</p>
    </div>
  </div>
</div>
!

CSS 

              
                .scroll-block {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
}

.scroll-block--left,
.scroll-block--right {
  -webkit-box-flex: 0;
  -ms-flex: 0 0 50%;
  flex: 0 0 50%;
  max-width: 50%;
}

.scroll-block--left {
  background-color: #ebeff2;
  transition: background-color .3s ease;
}

.sticky-block {
  height: 100vh;
  padding: 100px;
  position: relative;
  z-index: 0;
  opacity: 0;
  transition: opacity .3s ease;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -webkit-align-items: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  -ms-flex-pack: center;
  justify-content: center;
}

.sticky-block.show-content {
  opacity: 1;
  z-index: 10;
}

.scroll-block--right .bg-img::after {
  content: '';
  display: block;
  padding-bottom: 80%;
}

.bg-img {
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.scroll-block--content {
  padding: 60px 75px;
}

.normal-content {
  padding: 200px;
}

.page-letters {
  font-size: 100px;
  line-height: .75;
  color: #fff;
  position: absolute;
  bottom: 0;
  left: 0;
}
!

JS 

              
                var controller = new ScrollMagic.Controller();

function getHeight(el) {
  return el.height() - $(window).height();
}

$('.scroll-block').each(function() {
  var currentSticky = $(this).find('.sticky-block')[0],
      currentStatic = $(this).find('.scroll-block--right'),
      currentBg = $(this).data('bg'),
      staticSectionHeight = getHeight(currentStatic);

  // Recalculate static section height on resize for duration
  $(window).resize(function() {
    staticSectionHeight = getHeight(currentStatic);
  });

  // Create Pinning Scene
  var scene = new ScrollMagic.Scene({triggerElement: currentSticky, triggerHook: 'onLeave', duration: staticSectionHeight})
          .setPin(currentSticky, {
              pushFollowers: false
          })
          .setClassToggle(currentSticky, 'show-content')
          .on('enter', function(e){
            $('.scroll-block--left').css('background-color', currentBg);;
          })
          .addIndicators() // add indicators (requires plugin)
          .addTo(controller);
});
!
999px

Console