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
One exception are groups which only contain a single control (for instance the justified button groups with
<button> elements) or a dropdown.
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.
Wrap a series of buttons with
Combine sets of
<div class="btn-group"> into a
<div class="btn-toolbar"> for more complex components.
Instead of applying button sizing classes to every button in a group, just add
.btn-group-* to each
.btn-group, including when nesting multiple groups.
.btn-group within another
.btn-group when you want dropdown menus mixed with a series of buttons.
Make a set of buttons appear vertically stacked rather than horizontally. Split button dropdowns are not supported here.
Justified button groups
Make a group of buttons stretch at equal sizes to span the entire width of its parent. Also works with button dropdowns within the button group.
Due to the specific HTML and CSS used to justify buttons (namely
display: table-cell), the borders between them are doubled. In regular button groups,
margin-left: -1px is used to stack the borders instead of removing them. However,
margin doesn't work with
display: table-cell. As a result, depending on your customizations to Bootstrap, you may wish to remove or re-color the borders.
IE8 and borders
Internet Explorer 8 doesn't render borders on buttons in a justified button group, whether it's on
<button> elements. To get around that, wrap each button in another
See #12476 for more information.
Just wrap a series of
Links acting as buttons
<a> elements are used to act as buttons – triggering in-page functionality, rather than navigating to another document or section within the current page – they should also be given an appropriate
To use justified button groups with
<button> elements, you must wrap each button in a button group. Most browsers don't properly apply our CSS for justification to
<button> elements, but since we support button dropdowns, we can work around that.