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Port button group accessibility callout from v3 to v4

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Patrick H. Lauke 2017-04-18 15:14:07 +01:00 committed by GitHub
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docs/components/button-group.md
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@ -12,6 +12,14 @@ Group a series of buttons together on a single line with the button group. Add o
* Will be replaced with the ToC, excluding the "Contents" header
{:toc}
{% callout warning %}
## Ensure correct `role` and provide a label
In order for assistive technologies (such as screen readers) to convey that a series of buttons is grouped, an appropriate `role` attribute needs to be provided. For button groups, this would be `role="group"`, while toolbars should have a `role="toolbar"`.
In addition, groups and toolbars should be given an explicit label, as most assistive technologies will otherwise not announce them, despite the presence of the correct role attribute. In the examples provided here, we use `aria-label`, but alternatives such as `aria-labelledby` can also be used.
{% endcallout %}
## Basic example
Wrap a series of buttons with `.btn` in `.btn-group`.