Add Test case to documentation

css.html

@@ -2254,6 +2254,34 @@ For example, <code>&lt;section&gt;</code> should be wrapped as inline.
         <span class="visible-lg">&#10004; Visible on large</span>
       </div>
     </div>
+    <div class="row responsive-utilities-test hidden-on">
+      <div class="col-xs-6 col-sm-6">
+        <span class="hidden-xs hidden-sm">Extra small and small</span>
+        <span class="visible-xs visible-sm">&#10004; Visible on x-small and small</span>
+      </div>
+      <div class="col-xs-6 col-sm-6">
+        <span class="hidden-md hidden-lg">Medium and large</span>
+        <span class="visible-md visible-lg">&#10004; Visible on medium and large</span>
+      </div>
+      <div class="clearfix visible-xs"></div>  
+      <div class="col-xs-6 col-sm-6">
+        <span class="hidden-xs hidden-md">Extra small and medium</span>
+        <span class="visible-xs visible-md">&#10004; Visible on x-small and medium</span>
+      </div>
+      <div class="col-xs-6 col-sm-6">
+        <span class="hidden-sm hidden-lg">Small and large</span>
+        <span class="visible-sm visible-lg">&#10004; Visible on small and large</span>
+      </div>
+      <div class="clearfix visible-xs"></div>  
+      <div class="col-xs-6 col-sm-6">
+        <span class="hidden-xs hidden-lg">Extra small and large</span>
+        <span class="visible-xs visible-lg">&#10004; Visible on x-small and large</span>
+      </div>
+      <div class="col-xs-6 col-sm-6">
+        <span class="hidden-sm hidden-md">Small and medium</span>
+        <span class="visible-sm visible-md">&#10004; Visible on small and medium</span>
+      </div>  
+    </div>
     <h4>Hidden on...</h4>
     <p>Here, green checkmarks indicate the element <strong>is hidden</strong> in your current viewport.</p>
     <div class="row responsive-utilities-test hidden-on">
@@ -2275,5 +2303,33 @@ For example, <code>&lt;section&gt;</code> should be wrapped as inline.
         <span class="hidden-lg">&#10004; Hidden on large</span>
       </div>
     </div>
+    <div class="row responsive-utilities-test hidden-on">
+      <div class="col-xs-6 col-sm-6">
+        <span class="visible-xs visible-sm">Extra small and small</span>
+        <span class="hidden-xs hidden-sm">&#10004; Hidden on x-small and small</span>
+      </div>
+      <div class="col-xs-6 col-sm-6">
+        <span class="visible-md visible-lg">Medium and large</span>
+        <span class="hidden-md hidden-lg">&#10004; Hidden on medium and large</span>
+      </div>
+      <div class="clearfix visible-xs"></div>
+      <div class="col-xs-6 col-sm-6">
+        <span class="visible-xs visible-md">Extra small and medium</span>
+        <span class="hidden-xs hidden-md">&#10004; Hidden on x-small and medium</span>
+      </div>
+      <div class="col-xs-6 col-sm-6">
+        <span class="visible-sm visible-lg">Small and large</span>
+        <span class="hidden-sm hidden-lg">&#10004; Hidden on small and large</span>
+      </div>
+      <div class="clearfix visible-xs"></div>
+      <div class="col-xs-6 col-sm-6">
+        <span class="visible-xs visible-lg">Extra small and large</span>
+        <span class="hidden-xs hidden-lg">&#10004; Hidden on x-small and large</span>
+      </div>
+      <div class="col-xs-6 col-sm-6">
+        <span class="visible-sm visible-md">Small and medium</span>
+        <span class="hidden-sm hidden-md">&#10004; Hidden on small and medium</span>
+      </div>
+    </div>
 
   </div>