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`aria-haspopup` use requires the use of an ARIA `menu`, `listbox`, `tree`, `grid` or `dialog` (see https://www.w3.org/TR/wai-aria-1.1/#aria-haspopup) in our use (as generic disclosure widgets), it's incorrect and sets up the wrong assumption/behavior from assistive technologies. in future, we likely want to change our dropdowns to essentially be like a `dialog` - move focus to it when opened, possibly make it modal so focus is maintained inside it and the rest of the page is hidden/inert. but for now, removing the incorrect attribute is probably the quickest, most immediate fix.
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| layout | title | description | group | toc |
|---|---|---|---|---|
| docs | Button group | Group a series of buttons together on a single line with the button group, and super-power them with JavaScript. | components | true |
Basic example
Wrap a series of buttons with .btn in .btn-group. Add on optional JavaScript radio and checkbox style behavior with [our buttons plugin]({{ site.baseurl }}/docs/{{ site.docs_version }}/components/buttons/#button-plugin).
{% capture example %}
{% capture callout %}
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.
{% endcapture %}
{% include callout.html content=callout type="warning" %}
Button toolbar
Combine sets of button groups into button toolbars for more complex components. Use utility classes as needed to space out groups, buttons, and more.
{% capture example %}
Feel free to mix input groups with button groups in your toolbars. Similar to the example above, you'll likely need some utilities though to space things properly.
{% capture example %}
Sizing
Instead of applying button sizing classes to every button in a group, just add .btn-group-* to each .btn-group, including each one when nesting multiple groups.
{% highlight html %}
Nesting
Place a .btn-group within another .btn-group when you want dropdown menus mixed with a series of buttons.
{% capture example %}
Vertical variation
Make a set of buttons appear vertically stacked rather than horizontally. Split button dropdowns are not supported here.
{% highlight html %}