Merge branch 'v4' of https://github.com/twbs/derpstrap into v4

1 files changed, 14 insertions, 11 deletions

diff --git a/docs/components/button-group.md b/docs/components/button-group.md
index dbb7b1a33..9f223c7de 100644
--- a/docs/components/button-group.md
+++ b/docs/components/button-group.md
@@ -5,16 +5,19 @@ title: Button group
 
 Group a series of buttons together on a single line with the button group. Add on optional JavaScript radio and checkbox style behavior with [our buttons plugin](../javascript/#buttons).
 
-<div class="bs-callout bs-callout-warning">
-  <h4>Tooltips &amp; popovers in button groups require special setting</h4>
-  <p>When using tooltips or popovers on elements within a <code>.btn-group</code>, you'll have to specify the option <code>container: 'body'</code> to avoid unwanted side effects (such as the element growing wider and/or losing its rounded corners when the tooltip or popover is triggered).</p>
-</div>
+{% callout warning %}
+#### Tooltips & popovers in button groups require special setting
 
-<div class="bs-callout bs-callout-warning">
-  <h4>Ensure correct <code>role</code> and provide a label</h4>
-  <p>In order for assistive technologies – such as screen readers – to convey that a series of buttons is grouped, an appropriate <code>role</code> attribute needs to be provided. For button groups, this would be <code>role="group"</code>, while toolbars should have a <code>role="toolbar"</code>.</p>
-  <p>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 <code>role</code> attribute. In the examples provided here, we use <code>aria-label</code>, but alternatives such as <code>aria-labelledby</code> can also be used.</p>
-</div>
+When using tooltips or popovers on elements within a `.btn-group`, you'll have to specify the option `container: 'body'` to avoid unwanted side effects (such as the element growing wider and/or losing its rounded corners when the tooltip or popover is triggered).
+{% endcallout %}
+
+{% 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
 
@@ -55,7 +58,7 @@ Combine sets of button groups into button toolbars 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 each one when nesting multiple groups.
 
-<div class="bs-example">
+<div class="bd-example">
   <div class="btn-group btn-group-lg" role="group" aria-label="Large button group">
     <button type="button" class="btn btn-secondary">Left</button>
     <button type="button" class="btn btn-secondary">Middle</button>
@@ -113,7 +116,7 @@ Place a `.btn-group` within another `.btn-group` when you want dropdown menus mi
 
 Make a set of buttons appear vertically stacked rather than horizontally. **Split button dropdowns are not supported here.**
 
-<div class="bs-example">
+<div class="bd-example">
   <div class="btn-group-vertical" role="group" aria-label="Vertical button group">
     <button type="button" class="btn btn-secondary">Button</button>
     <button type="button" class="btn btn-secondary">Button</button>