Pen Settings



CSS Base

Vendor Prefixing

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.

+ add another resource


Babel includes JSX processing.

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.

+ add another resource


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.


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.

Format on Save

If enabled, your code will be formatted when you actively save your Pen. Note: your code becomes un-folded during formatting.

Editor Settings

Code Indentation

Want to change your Syntax Highlighting theme, Fonts and more?

Visit your global Editor Settings.


                <!-- videojs must be included first -->
<link href="//" rel="stylesheet">
<script src="//"></script>

<script src=""></script>

<!-- body -->
<!-- body -->
<!-- techs will be included automatically. By default the order is: "viblast,viblastflash, html5" -->
<video id="example_video_1" class="video-js vjs-big-play-centered"
       controls preload="auto" width="640" height="264" autoplay
  <!-- this is an important to specify the type of the video. Use 'application/x-mpegURL' for HLS streams or 'application/dash+xml' for DASH streams -->
  <source src="//" type='application/x-mpegURL' />
  <p class="vjs-no-js">To view this video please enable JavaScript, and consider upgrading to a web browser that <a href="" target="_blank">supports HTML5 video</a></p>




                // initialize videojs
videojs('#example_video_1', {
  viblast: {
    xhrBeforeSend: function(ev) {
      // This callback will be called for all requests.
      // ev.xhr can be manipulated in any way neccessary.
      // In this example we just log a message on the console
      console.log('Viblast is making a', ev.method, 'request to ', ev.url);
      // but we could also do something like
      // ev.xhr.setRequestHeader('MY-HEADER', 'VALUE');