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Mark Otto 0e920ce3f4 Reorganize docs for easier deploys
With the current docs directory setup, I'm making too many mistakes and have to manually address path changes and directory moves on deploy. This makes for a frustrating experience developing locally and shipping releases. With this PR, we're basically back to the same setup from v3—duplicating the dist directory into our docs directory. Not the most ideal, but very straightforward for me as the release manager.
2018-07-11 23:30:46 -07:00

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---
layout: docs
title: Images
description: Documentation and examples for opting images into responsive behavior (so they never become larger than their parent elements) and add lightweight styles to them—all via classes.
group: content
toc: true
---
## Responsive images
Images in Bootstrap are made responsive with `.img-fluid`. `max-width: 100%;` and `height: auto;` are applied to the image so that it scales with the parent element.
<div class="bd-example">
<img data-src="holder.js/100px250" class="img-fluid" alt="Generic responsive image">
</div>
{% highlight html %}
<img src="..." class="img-fluid" alt="Responsive image">
{% endhighlight %}
{% capture callout %}
##### SVG images and IE 10
In Internet Explorer 10, SVG images with `.img-fluid` are disproportionately sized. To fix this, add `width: 100% \9;` where necessary. This fix improperly sizes other image formats, so Bootstrap doesn't apply it automatically.
{% endcapture %}
{% include callout.html content=callout type="warning" %}
## Image thumbnails
In addition to our [border-radius utilities]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/borders/), you can use `.img-thumbnail` to give an image a rounded 1px border appearance.
<div class="bd-example bd-example-images">
<img data-src="holder.js/200x200" class="img-thumbnail" alt="A generic square placeholder image with a white border around it, making it resemble a photograph taken with an old instant camera">
</div>
{% highlight html %}
<img src="..." alt="..." class="img-thumbnail">
{% endhighlight %}
## Aligning images
Align images with the [helper float classes]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/float) or [text alignment classes]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/text/#text-alignment). `block`-level images can be centered using [the `.mx-auto` margin utility class]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/spacing/#horizontal-centering).
<div class="bd-example bd-example-images">
<img data-src="holder.js/200x200" class="rounded float-left" alt="A generic square placeholder image with rounded corners">
<img data-src="holder.js/200x200" class="rounded float-right" alt="A generic square placeholder image with rounded corners">
</div>
{% highlight html %}
<img src="..." class="rounded float-left" alt="...">
<img src="..." class="rounded float-right" alt="...">
{% endhighlight %}
<div class="bd-example bd-example-images">
<img data-src="holder.js/200x200" class="rounded mx-auto d-block" alt="A generic square placeholder image with rounded corners">
</div>
{% highlight html %}
<img src="..." class="rounded mx-auto d-block" alt="...">
{% endhighlight %}
<div class="bd-example bd-example-images">
<div class="text-center">
<img data-src="holder.js/200x200" class="rounded" alt="A generic square placeholder image with rounded corners">
</div>
</div>
{% highlight html %}
<div class="text-center">
<img src="..." class="rounded" alt="...">
</div>
{% endhighlight %}
## Picture
If you are using the `<picture>` element to specify multiple `<source>` elements for a specific `<img>`, make sure to add the `.img-*` classes to the `<img>` and not to the `<picture>` tag.
{% highlight html %}
<picture>
<source srcset="..." type="image/svg+xml">
<img src="..." class="img-fluid img-thumbnail" alt="...">
</picture>
{% endhighlight %}