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.

+ add another resource

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.

+ add another resource

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.

⚠️ This feature can only be used by logged in users.

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.

              <section class="content">
      <img srcset=" 1x, 2x, 3x" src="" />

    <h1>Demonstrating Srcset &amp; DPR using imgix </h1>
    <h2>using <code>fit=max</code>, <code>auto=format</code> and variable quality for smaller file sizes.</h2>
    <p>Using the imgix <code>w</code> and <code>dpr</code> URL parameters, we can simplify the amount of effort it takes to generate the srcset attributes on our images. This example, when viewed on a dpr 2 or 3 device will display the appropriate image.
      Look to the text on the lower right of the image set with imgix to confirm. Using the <code>fit=max</code> param on an imgix URL will ensure that an image is never delivered larger than its original size.</p>
    <p>If you plan on targeting chrome browsers, android and ios devices, making use of <code>auto=format</code> will deliver light-weight webP images for chrome browsers and default to the original format for other instances.
    <p>When setting dpr with imgix, you may want to consider adjusting the quality of your images. Setting the <code>q</code> parameter to lower values for higher dprs allows you to reduce the file size while maintaining a denser pixel set for your image.</p>
  <div class="button-group">
    <a href="" target="_blank" class="button">View Blog Post</a>
    <a href="" target="_blank" class="button">Visit</a>
  <a href="" target="_blank"><img src="" width="160" height="60"></a>
🕑 One or more of the npm packages you are using needs to be built. You're the first person to ever need it! We're building it right now and your preview will start updating again when it's ready.