62 lines
2.0 KiB
Markdown
62 lines
2.0 KiB
Markdown
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---
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layout: docs
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title: Embeds
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description: Create responsive video or slideshow embeds based on the width of the parent by creating an intrinsic ratio that scales on any device.
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group: utilities
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toc: true
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---
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## About
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Rules are directly applied to `<iframe>`, `<embed>`, `<video>`, and `<object>` elements; optionally use an explicit descendant class `.embed-responsive-item` when you want to match the styling for other attributes.
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**Pro-Tip!** You don't need to include `frameborder="0"` in your `<iframe>`s as we override that for you.
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## Example
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Wrap any embed like an `<iframe>` in a parent element with `.embed-responsive` and an aspect ratio. The `.embed-responsive-item` isn't strictly required, but we encourage it.
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{% capture example %}
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<div class="embed-responsive embed-responsive-16by9">
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<iframe class="embed-responsive-item" src="https://www.youtube.com/embed/zpOULjyy-n8?rel=0" allowfullscreen></iframe>
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</div>
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{% endcapture %}
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{% include example.html content=example %}
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## Aspect ratios
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Aspect ratios can be customized with modifier classes. By default the following ratio classes are provided:
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{% highlight html %}
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<!-- 21:9 aspect ratio -->
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<div class="embed-responsive embed-responsive-21by9">
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<iframe class="embed-responsive-item" src="..."></iframe>
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</div>
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<!-- 16:9 aspect ratio -->
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<div class="embed-responsive embed-responsive-16by9">
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<iframe class="embed-responsive-item" src="..."></iframe>
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</div>
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<!-- 4:3 aspect ratio -->
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<div class="embed-responsive embed-responsive-4by3">
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<iframe class="embed-responsive-item" src="..."></iframe>
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</div>
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<!-- 1:1 aspect ratio -->
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<div class="embed-responsive embed-responsive-1by1">
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<iframe class="embed-responsive-item" src="..."></iframe>
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</div>
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{% endhighlight %}
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Within `_variables.scss`, you can change the aspect ratios you want to use. Here's an example of the `$embed-responsive-aspect-ratios` list:
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{% highlight scss %}
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$embed-responsive-aspect-ratios: (
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(21 9),
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(16 9),
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(4 3),
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(1 1)
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) !default;
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{% endhighlight %}
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