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Pen Settings

CSS Base

Vendor Prefixing

Add External CSS

These stylesheets will be added in this order and before the code you write in the CSS editor. You can also add another Pen here, and it will pull the CSS from it. Try typing "font" or "ribbon" below.

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Add External JavaScript

These scripts will run in this order and before the code in the JavaScript editor. You can also link to another Pen here, and it will run the JavaScript from it. Also try typing the name of any popular library.

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Code Indentation


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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.

  <source media="(max-width: 500px)"
               srcset="https://responsiveimag.es/images/Apples-slices.jpg, https://responsiveimag.es/images/Apples-slices-2x.jpg 2x" />
  <source media="(max-width: 780px)"
               srcset="https://responsiveimag.es/images/Apples-crop-500.jpg 500w, https://responsiveimag.es/images/Apples-crop-600.jpg 600w, https://responsiveimag.es/images/Apples-crop-800.jpg 800w" />
  <source srcset="https://responsiveimag.es/images/Apples-800.jpg 800w, https://responsiveimag.es/images/Apples-1000.jpg 1000w, https://responsiveimag.es/images/Apples-1800.jpg 1800w"/>
  <img src="https://responsiveimag.es/images/Apples-fallback.jpg" alt="How do you like them Apples?" />
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