From 1ded0d6a4eefb7daca62c44e4e735aec200f0b6f Mon Sep 17 00:00:00 2001
From: Mark Otto <otto@github.com>
Date: Mon, 11 Feb 2019 11:15:34 -0800
Subject: Release v4.3.0 (#28228)

* Prep for v4.3.0

* More updates for v4.3.0.

* rerun to build docs source map
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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">
+  {% include icons/placeholder.svg width="100%" height="250" class="bd-placeholder-img-lg img-fluid" text="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">
+  {% include icons/placeholder.svg width="200" height="200" class="img-thumbnail" title="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">
+  {% include icons/placeholder.svg width="200" height="200" class="rounded float-left" %}
+  {% include icons/placeholder.svg width="200" height="200" class="rounded float-right" %}
+</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">
+  {% include icons/placeholder.svg width="200" height="200" class="rounded mx-auto d-block" %}
+</div>
+
+{% highlight html %}
+<img src="..." class="rounded mx-auto d-block" alt="...">
+{% endhighlight %}
+
+<div class="bd-example bd-example-images">
+  <div class="text-center">
+    {% include icons/placeholder.svg width="200" height="200" class="rounded" %}
+  </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 %}
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