c031584bcd
* SVG accessibility fixes - add `focusable="false"` to all SVGs, to stop IE from including the `<svg>` in its default focus cycle - completely hide decorative SVGs using `aria-hidden="true"` - add `role="img"` to meaningful/"content" SVGs, ensure they have an appropriate `<title>` and/or `aria-label` - simplify placeholder default title * Simplify usage of placeholder.svg in the docs - in most cases, no need for separate/redundant text and title (now that we make text itself part of the alternative text explicitly) - no need (expect in rare cirumstances) to describe the placeholder image (unless the look of the image is important/the actual content, as is the case with the image thumbnail class) * Simplify example.html rewriting of <svg> to <img> code sample - as the `alt` for the placeholder isn't really important, just add an ellipsis instead (otherwise, to be correct, we'd have to construct the whole "title+text" construct like we do now in the placeholder.svg itself * Change svgo configuration to retain role attribute and add/force focusable=false - regarding `focusable=false`, see https://github.com/svg/svgo/issues/1011 (which would be the "proper" SVGO fix) and the (hacky) solution https://github.com/svg/svgo/pull/817
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| layout | title | description | group | toc |
|---|---|---|---|---|
| docs | Images | 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. | content | 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.
{% highlight html %}
{% 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.
{% highlight html %}
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).
{% highlight html %}
{% highlight html %}
{% highlight html %}
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 %}