Merge branch 'twbs/v4-dev' into v4-dev

1 files changed, 26 insertions, 18 deletions

diff --git a/docs/components/collapse.md b/docs/components/collapse.md
index f3a6fdc6c..e98fae276 100644
--- a/docs/components/collapse.md
+++ b/docs/components/collapse.md
@@ -1,6 +1,7 @@
 ---
 layout: docs
 title: Collapse
+description: Toggle the visibility of content across your project with a few classes and our JavaScript plugins.
 group: components
 ---
 
@@ -43,40 +44,47 @@ Extend the default collapse behavior to create an accordion.
 
 {% example html %}
 <div id="accordion" role="tablist" aria-multiselectable="true">
-  <div class="panel panel-default">
-    <div class="panel-heading" role="tab" id="headingOne">
-      <h4 class="panel-title">
+  <div class="card">
+    <div class="card-header" role="tab" id="headingOne">
+      <h5 class="mb-0">
         <a data-toggle="collapse" data-parent="#accordion" href="#collapseOne" aria-expanded="true" aria-controls="collapseOne">
           Collapsible Group Item #1
         </a>
-      </h4>
+      </h5>
     </div>
-    <div id="collapseOne" class="panel-collapse collapse in" role="tabpanel" aria-labelledby="headingOne">
-      Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.
+
+    <div id="collapseOne" class="collapse in" role="tabpanel" aria-labelledby="headingOne">
+      <div class="card-block">
+        Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.
+      </div>
     </div>
   </div>
-  <div class="panel panel-default">
-    <div class="panel-heading" role="tab" id="headingTwo">
-      <h4 class="panel-title">
+  <div class="card">
+    <div class="card-header" role="tab" id="headingTwo">
+      <h5 class="mb-0">
         <a class="collapsed" data-toggle="collapse" data-parent="#accordion" href="#collapseTwo" aria-expanded="false" aria-controls="collapseTwo">
           Collapsible Group Item #2
         </a>
-      </h4>
+      </h5>
     </div>
-    <div id="collapseTwo" class="panel-collapse collapse" role="tabpanel" aria-labelledby="headingTwo">
-      Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.
+    <div id="collapseTwo" class="collapse" role="tabpanel" aria-labelledby="headingTwo">
+      <div class="card-block">
+        Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.
+      </div>
     </div>
   </div>
-  <div class="panel panel-default">
-    <div class="panel-heading" role="tab" id="headingThree">
-      <h4 class="panel-title">
+  <div class="card">
+    <div class="card-header" role="tab" id="headingThree">
+      <h5 class="mb-0">
         <a class="collapsed" data-toggle="collapse" data-parent="#accordion" href="#collapseThree" aria-expanded="false" aria-controls="collapseThree">
           Collapsible Group Item #3
         </a>
-      </h4>
+      </h5>
     </div>
-    <div id="collapseThree" class="panel-collapse collapse" role="tabpanel" aria-labelledby="headingThree">
-      Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.
+    <div id="collapseThree" class="collapse" role="tabpanel" aria-labelledby="headingThree">
+      <div class="card-block">
+        Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.
+      </div>
     </div>
   </div>
 </div>