Pen Settings

CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URL's added here will be added as <link>s in order, and before the CSS in the editor. If you link to another Pen, it will include the CSS from that Pen. If the preprocessor matches, it will attempt to combine them before processing.

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You're using npm packages, so we've auto-selected Babel for you here, which we require to process imports and make it all work. If you need to use a different JavaScript preprocessor, remove the packages in the npm tab.

Add External Scripts/Pens

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.

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Use npm Packages

We can make npm packages available for you to use in your JavaScript. We use webpack to prepare them and make them available to import. We'll also process your JavaScript with Babel.

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Code Indentation


Save Automatically?

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

HTML Settings

Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

              <div class="jumbotron jumbotron-fluid">

<video autoplay muted loop poster="">    
    <source src="" data-src="//" type="video/mp4">
    <source src="" data-src="//" type="video/webm">
    <source src="" data-src="//" type="video/ogg">

  <div class="container text-white">

    <h1 class="display-4">Hello, world!</h1>
    <p class="lead">This is a simple hero unit, a simple jumbotron-style component for calling extra attention to featured content or information.</p>
    <hr class="my-4">
    <p>It uses utility classes for typography and spacing to space content out within the larger container.</p>
    <a class="btn btn-primary btn-lg" href="#" role="button">Learn more</a>

  <!-- /.container -->
<!-- /.jumbotron -->
              .jumbotron {
  position: relative;
  overflow: hidden;
.jumbotron video {
  position: absolute;
  z-index: 1;
  top: 0;
  /*  object-fit is not supported on IE  */
  object-fit: cover;
.jumbotron .container {
  z-index: 2;
  position: relative;

              function deferVideo() {

    //defer html5 video loading
  $("video source").each(function() {
    var sourceFile = $(this).attr("data-src");
    $(this).attr("src", sourceFile);
    var video = this.parentElement;
    // uncomment if video is not autoplay

window.onload = deferVideo;

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