Remove incorrect aria-haspopup from dropdown toggles (#28299)

`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.

11 files changed, 71 insertions, 71 deletions

diff --git a/site/docs/4.3/components/button-group.md b/site/docs/4.3/components/button-group.md
index 2261a5e729..8459dc4c26 100644
--- a/site/docs/4.3/components/button-group.md
+++ b/site/docs/4.3/components/button-group.md
@@ -127,7 +127,7 @@ Place a `.btn-group` within another `.btn-group` when you want dropdown menus mi
   <button type="button" class="btn btn-secondary">2</button>
 
   <div class="btn-group" role="group">
-    <button id="btnGroupDrop1" type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+    <button id="btnGroupDrop1" type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
       Dropdown
     </button>
     <div class="dropdown-menu" aria-labelledby="btnGroupDrop1">
@@ -160,7 +160,7 @@ Make a set of buttons appear vertically stacked rather than horizontally. **Spli
     <button type="button" class="btn btn-secondary">Button</button>
     <button type="button" class="btn btn-secondary">Button</button>
     <div class="btn-group" role="group">
-      <button id="btnGroupVerticalDrop1" type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+      <button id="btnGroupVerticalDrop1" type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
         Dropdown
       </button>
       <div class="dropdown-menu" aria-labelledby="btnGroupVerticalDrop1">
@@ -171,7 +171,7 @@ Make a set of buttons appear vertically stacked rather than horizontally. **Spli
     <button type="button" class="btn btn-secondary">Button</button>
     <button type="button" class="btn btn-secondary">Button</button>
     <div class="btn-group" role="group">
-      <button id="btnGroupVerticalDrop2" type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+      <button id="btnGroupVerticalDrop2" type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
         Dropdown
       </button>
       <div class="dropdown-menu" aria-labelledby="btnGroupVerticalDrop2">
@@ -180,7 +180,7 @@ Make a set of buttons appear vertically stacked rather than horizontally. **Spli
       </div>
     </div>
     <div class="btn-group" role="group">
-      <button id="btnGroupVerticalDrop3" type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+      <button id="btnGroupVerticalDrop3" type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
         Dropdown
       </button>
       <div class="dropdown-menu" aria-labelledby="btnGroupVerticalDrop3">
@@ -189,7 +189,7 @@ Make a set of buttons appear vertically stacked rather than horizontally. **Spli
       </div>
     </div>
     <div class="btn-group" role="group">
-      <button id="btnGroupVerticalDrop4" type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+      <button id="btnGroupVerticalDrop4" type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
         Dropdown
       </button>
       <div class="dropdown-menu" aria-labelledby="btnGroupVerticalDrop4">
diff --git a/site/docs/4.3/components/dropdowns.md b/site/docs/4.3/components/dropdowns.md
index 417d9f5eab..865160a5c4 100644
--- a/site/docs/4.3/components/dropdowns.md
+++ b/site/docs/4.3/components/dropdowns.md
@@ -32,7 +32,7 @@ Any single `.btn` can be turned into a dropdown toggle with some markup changes.
 
 {% capture example %}
 <div class="dropdown">
-  <button class="btn btn-secondary dropdown-toggle" type="button" id="dropdownMenuButton" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+  <button class="btn btn-secondary dropdown-toggle" type="button" id="dropdownMenuButton" data-toggle="dropdown" aria-expanded="false">
     Dropdown button
   </button>
   <div class="dropdown-menu" aria-labelledby="dropdownMenuButton">
@@ -48,7 +48,7 @@ And with `<a>` elements:
 
 {% capture example %}
 <div class="dropdown">
-  <a class="btn btn-secondary dropdown-toggle" href="#" role="button" id="dropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+  <a class="btn btn-secondary dropdown-toggle" href="#" role="button" id="dropdownMenuLink" data-toggle="dropdown" aria-expanded="false">
     Dropdown link
   </a>
 
@@ -65,7 +65,7 @@ The best part is you can do this with any button variant, too:
 
 <div class="bd-example">
   <div class="btn-group">
-    <button type="button" class="btn btn-primary dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Primary</button>
+    <button type="button" class="btn btn-primary dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Primary</button>
     <div class="dropdown-menu">
       <a class="dropdown-item" href="#">Action</a>
       <a class="dropdown-item" href="#">Another action</a>
@@ -75,7 +75,7 @@ The best part is you can do this with any button variant, too:
     </div>
   </div><!-- /btn-group -->
   <div class="btn-group">
-    <button type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Secondary</button>
+    <button type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Secondary</button>
     <div class="dropdown-menu">
       <a class="dropdown-item" href="#">Action</a>
       <a class="dropdown-item" href="#">Another action</a>
@@ -85,7 +85,7 @@ The best part is you can do this with any button variant, too:
     </div>
   </div><!-- /btn-group -->
   <div class="btn-group">
-    <button type="button" class="btn btn-success dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Success</button>
+    <button type="button" class="btn btn-success dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Success</button>
     <div class="dropdown-menu">
       <a class="dropdown-item" href="#">Action</a>
       <a class="dropdown-item" href="#">Another action</a>
@@ -95,7 +95,7 @@ The best part is you can do this with any button variant, too:
     </div>
   </div><!-- /btn-group -->
   <div class="btn-group">
-    <button type="button" class="btn btn-info dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Info</button>
+    <button type="button" class="btn btn-info dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Info</button>
     <div class="dropdown-menu">
       <a class="dropdown-item" href="#">Action</a>
       <a class="dropdown-item" href="#">Another action</a>
@@ -105,7 +105,7 @@ The best part is you can do this with any button variant, too:
     </div>
   </div><!-- /btn-group -->
   <div class="btn-group">
-    <button type="button" class="btn btn-warning dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Warning</button>
+    <button type="button" class="btn btn-warning dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Warning</button>
     <div class="dropdown-menu">
       <a class="dropdown-item" href="#">Action</a>
       <a class="dropdown-item" href="#">Another action</a>
@@ -115,7 +115,7 @@ The best part is you can do this with any button variant, too:
     </div>
   </div><!-- /btn-group -->
   <div class="btn-group">
-    <button type="button" class="btn btn-danger dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Danger</button>
+    <button type="button" class="btn btn-danger dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Danger</button>
     <div class="dropdown-menu">
       <a class="dropdown-item" href="#">Action</a>
       <a class="dropdown-item" href="#">Another action</a>
@@ -129,7 +129,7 @@ The best part is you can do this with any button variant, too:
 {% highlight html %}
 <!-- Example single danger button -->
 <div class="btn-group">
-  <button type="button" class="btn btn-danger dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+  <button type="button" class="btn btn-danger dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
     Action
   </button>
   <div class="dropdown-menu">
@@ -151,7 +151,7 @@ We use this extra class to reduce the horizontal `padding` on either side of the
 <div class="bd-example">
   <div class="btn-group">
     <button type="button" class="btn btn-primary">Primary</button>
-    <button type="button" class="btn btn-primary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+    <button type="button" class="btn btn-primary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-expanded="false">
       <span class="sr-only">Toggle Dropdown</span>
     </button>
     <div class="dropdown-menu">
@@ -164,7 +164,7 @@ We use this extra class to reduce the horizontal `padding` on either side of the
   </div><!-- /btn-group -->
   <div class="btn-group">
     <button type="button" class="btn btn-secondary">Secondary</button>
-    <button type="button" class="btn btn-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+    <button type="button" class="btn btn-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-expanded="false">
       <span class="sr-only">Toggle Dropdown</span>
     </button>
     <div class="dropdown-menu">
@@ -177,7 +177,7 @@ We use this extra class to reduce the horizontal `padding` on either side of the
   </div><!-- /btn-group -->
   <div class="btn-group">
     <button type="button" class="btn btn-success">Success</button>
-    <button type="button" class="btn btn-success dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+    <button type="button" class="btn btn-success dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-expanded="false">
       <span class="sr-only">Toggle Dropdown</span>
     </button>
     <div class="dropdown-menu">
@@ -190,7 +190,7 @@ We use this extra class to reduce the horizontal `padding` on either side of the
   </div><!-- /btn-group -->
   <div class="btn-group">
     <button type="button" class="btn btn-info">Info</button>
-    <button type="button" class="btn btn-info dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+    <button type="button" class="btn btn-info dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-expanded="false">
       <span class="sr-only">Toggle Dropdown</span>
     </button>
     <div class="dropdown-menu">
@@ -203,7 +203,7 @@ We use this extra class to reduce the horizontal `padding` on either side of the
   </div><!-- /btn-group -->
   <div class="btn-group">
     <button type="button" class="btn btn-warning">Warning</button>
-    <button type="button" class="btn btn-warning dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+    <button type="button" class="btn btn-warning dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-expanded="false">
       <span class="sr-only">Toggle Dropdown</span>
     </button>
     <div class="dropdown-menu">
@@ -216,7 +216,7 @@ We use this extra class to reduce the horizontal `padding` on either side of the
   </div><!-- /btn-group -->
   <div class="btn-group">
     <button type="button" class="btn btn-danger">Danger</button>
-    <button type="button" class="btn btn-danger dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+    <button type="button" class="btn btn-danger dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-expanded="false">
       <span class="sr-only">Toggle Dropdown</span>
     </button>
     <div class="dropdown-menu">
@@ -233,7 +233,7 @@ We use this extra class to reduce the horizontal `padding` on either side of the
 <!-- Example split danger button -->
 <div class="btn-group">
   <button type="button" class="btn btn-danger">Action</button>
-  <button type="button" class="btn btn-danger dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+  <button type="button" class="btn btn-danger dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-expanded="false">
     <span class="sr-only">Toggle Dropdown</span>
   </button>
   <div class="dropdown-menu">
@@ -253,7 +253,7 @@ Button dropdowns work with buttons of all sizes, including default and split dro
 <div class="bd-example">
   <div class="btn-toolbar" role="toolbar">
     <div class="btn-group">
-      <button class="btn btn-secondary btn-lg dropdown-toggle" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+      <button class="btn btn-secondary btn-lg dropdown-toggle" type="button" data-toggle="dropdown" aria-expanded="false">
         Large button
       </button>
       <div class="dropdown-menu">
@@ -266,7 +266,7 @@ Button dropdowns work with buttons of all sizes, including default and split dro
     </div><!-- /btn-group -->
     <div class="btn-group ml-2">
       <button type="button" class="btn btn-lg btn-secondary">Large split button</button>
-      <button type="button" class="btn btn-lg btn-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+      <button type="button" class="btn btn-lg btn-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-expanded="false">
         <span class="sr-only">Toggle Dropdown</span>
       </button>
       <div class="dropdown-menu">
@@ -280,7 +280,7 @@ Button dropdowns work with buttons of all sizes, including default and split dro
   </div><!-- /btn-toolbar -->
   <div class="btn-toolbar" role="toolbar">
     <div class="btn-group">
-      <button class="btn btn-secondary btn-sm dropdown-toggle" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+      <button class="btn btn-secondary btn-sm dropdown-toggle" type="button" data-toggle="dropdown" aria-expanded="false">
         Small button
       </button>
       <div class="dropdown-menu">
@@ -293,7 +293,7 @@ Button dropdowns work with buttons of all sizes, including default and split dro
     </div><!-- /btn-group -->
     <div class="btn-group ml-2">
       <button type="button" class="btn btn-sm btn-secondary">Small split button</button>
-      <button type="button" class="btn btn-sm btn-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+      <button type="button" class="btn btn-sm btn-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-expanded="false">
         <span class="sr-only">Toggle Dropdown</span>
       </button>
       <div class="dropdown-menu">
@@ -310,7 +310,7 @@ Button dropdowns work with buttons of all sizes, including default and split dro
 {% highlight html %}
 <!-- Large button groups (default and split) -->
 <div class="btn-group">
-  <button class="btn btn-secondary btn-lg dropdown-toggle" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+  <button class="btn btn-secondary btn-lg dropdown-toggle" type="button" data-toggle="dropdown" aria-expanded="false">
     Large button
   </button>
   <div class="dropdown-menu">
@@ -321,7 +321,7 @@ Button dropdowns work with buttons of all sizes, including default and split dro
   <button class="btn btn-secondary btn-lg" type="button">
     Large split button
   </button>
-  <button type="button" class="btn btn-lg btn-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+  <button type="button" class="btn btn-lg btn-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-expanded="false">
     <span class="sr-only">Toggle Dropdown</span>
   </button>
   <div class="dropdown-menu">
@@ -331,7 +331,7 @@ Button dropdowns work with buttons of all sizes, including default and split dro
 
 <!-- Small button groups (default and split) -->
 <div class="btn-group">
-  <button class="btn btn-secondary btn-sm dropdown-toggle" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+  <button class="btn btn-secondary btn-sm dropdown-toggle" type="button" data-toggle="dropdown" aria-expanded="false">
     Small button
   </button>
   <div class="dropdown-menu">
@@ -342,7 +342,7 @@ Button dropdowns work with buttons of all sizes, including default and split dro
   <button class="btn btn-secondary btn-sm" type="button">
     Small split button
   </button>
-  <button type="button" class="btn btn-sm btn-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+  <button type="button" class="btn btn-sm btn-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-expanded="false">
     <span class="sr-only">Toggle Dropdown</span>
   </button>
   <div class="dropdown-menu">
@@ -359,7 +359,7 @@ Trigger dropdown menus above elements by adding `.dropup` to the parent element.
 
 <div class="bd-example">
   <div class="btn-group dropup">
-    <button type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+    <button type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
       Dropup
     </button>
     <div class="dropdown-menu">
@@ -375,7 +375,7 @@ Trigger dropdown menus above elements by adding `.dropup` to the parent element.
     <button type="button" class="btn btn-secondary">
       Split dropup
     </button>
-    <button type="button" class="btn btn-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+    <button type="button" class="btn btn-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-expanded="false">
       <span class="sr-only">Toggle Dropdown</span>
     </button>
     <div class="dropdown-menu">
@@ -391,7 +391,7 @@ Trigger dropdown menus above elements by adding `.dropup` to the parent element.
 {% highlight html %}
 <!-- Default dropup button -->
 <div class="btn-group dropup">
-  <button type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+  <button type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
     Dropup
   </button>
   <div class="dropdown-menu">
@@ -404,7 +404,7 @@ Trigger dropdown menus above elements by adding `.dropup` to the parent element.
   <button type="button" class="btn btn-secondary">
     Split dropup
   </button>
-  <button type="button" class="btn btn-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+  <button type="button" class="btn btn-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-expanded="false">
     <span class="sr-only">Toggle Dropdown</span>
   </button>
   <div class="dropdown-menu">
@@ -419,7 +419,7 @@ Trigger dropdown menus at the right of the elements by adding `.dropright` to th
 
 <div class="bd-example">
   <div class="btn-group dropright">
-    <button type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+    <button type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
       Dropright
     </button>
     <div class="dropdown-menu">
@@ -435,7 +435,7 @@ Trigger dropdown menus at the right of the elements by adding `.dropright` to th
     <button type="button" class="btn btn-secondary">
       Split dropright
     </button>
-    <button type="button" class="btn btn-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+    <button type="button" class="btn btn-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-expanded="false">
       <span class="sr-only">Toggle Dropright</span>
     </button>
     <div class="dropdown-menu">
@@ -451,7 +451,7 @@ Trigger dropdown menus at the right of the elements by adding `.dropright` to th
 {% highlight html %}
 <!-- Default dropright button -->
 <div class="btn-group dropright">
-  <button type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+  <button type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
     Dropright
   </button>
   <div class="dropdown-menu">
@@ -464,7 +464,7 @@ Trigger dropdown menus at the right of the elements by adding `.dropright` to th
   <button type="button" class="btn btn-secondary">
     Split dropright
   </button>
-  <button type="button" class="btn btn-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+  <button type="button" class="btn btn-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-expanded="false">
     <span class="sr-only">Toggle Dropright</span>
   </button>
   <div class="dropdown-menu">
@@ -479,7 +479,7 @@ Trigger dropdown menus at the left of the elements by adding `.dropleft` to the
 
 <div class="bd-example">
   <div class="btn-group dropleft">
-    <button type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+    <button type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
       Dropleft
     </button>
     <div class="dropdown-menu">
@@ -493,7 +493,7 @@ Trigger dropdown menus at the left of the elements by adding `.dropleft` to the
 
   <div class="btn-group">
     <div class="btn-group dropleft" role="group">
-      <button type="button" class="btn btn-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+      <button type="button" class="btn btn-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-expanded="false">
         <span class="sr-only">Toggle Dropleft</span>
       </button>
       <div class="dropdown-menu">
@@ -513,7 +513,7 @@ Trigger dropdown menus at the left of the elements by adding `.dropleft` to the
 {% highlight html %}
 <!-- Default dropleft button -->
 <div class="btn-group dropleft">
-  <button type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+  <button type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
     Dropleft
   </button>
   <div class="dropdown-menu">
@@ -524,7 +524,7 @@ Trigger dropdown menus at the left of the elements by adding `.dropleft` to the
 <!-- Split dropleft button -->
 <div class="btn-group">
   <div class="btn-group dropleft" role="group">
-    <button type="button" class="btn btn-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+    <button type="button" class="btn btn-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-expanded="false">
       <span class="sr-only">Toggle Dropleft</span>
     </button>
     <div class="dropdown-menu">
@@ -543,7 +543,7 @@ Historically dropdown menu contents *had* to be links, but that's no longer the
 
 {% capture example %}
 <div class="dropdown">
-  <button class="btn btn-secondary dropdown-toggle" type="button" id="dropdownMenu2" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+  <button class="btn btn-secondary dropdown-toggle" type="button" id="dropdownMenu2" data-toggle="dropdown" aria-expanded="false">
     Dropdown
   </button>
   <div class="dropdown-menu" aria-labelledby="dropdownMenu2">
@@ -604,7 +604,7 @@ By default, a dropdown menu is automatically positioned 100% from the top and al
 
 {% capture example %}
 <div class="btn-group">
-  <button type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+  <button type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
     Right-aligned menu
   </button>
   <div class="dropdown-menu dropdown-menu-right">
@@ -624,7 +624,7 @@ To align **right** the dropdown menu with the given breakpoint or larger, add `.
 
 {% capture example %}
 <div class="btn-group">
-  <button type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" data-display="static" aria-haspopup="true" aria-expanded="false">
+  <button type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" data-display="static" aria-expanded="false">
     Left-aligned but right aligned when large screen
   </button>
   <div class="dropdown-menu dropdown-menu-lg-right">
@@ -640,7 +640,7 @@ To align **left** the dropdown menu with the given breakpoint or larger, add `.d
 
 {% capture example %}
 <div class="btn-group">
-  <button type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" data-display="static" aria-haspopup="true" aria-expanded="false">
+  <button type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" data-display="static" aria-expanded="false">
     Right-aligned but left aligned when large screen
   </button>
   <div class="dropdown-menu dropdown-menu-right dropdown-menu-lg-left">
@@ -762,7 +762,7 @@ Use `data-offset` or `data-reference` to change the location of the dropdown.
 {% capture example %}
 <div class="d-flex">
   <div class="dropdown mr-1">
-    <button type="button" class="btn btn-secondary dropdown-toggle" id="dropdownMenuOffset" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false" data-offset="10,20">
+    <button type="button" class="btn btn-secondary dropdown-toggle" id="dropdownMenuOffset" data-toggle="dropdown" aria-expanded="false" data-offset="10,20">
       Offset
     </button>
     <div class="dropdown-menu" aria-labelledby="dropdownMenuOffset">
@@ -773,7 +773,7 @@ Use `data-offset` or `data-reference` to change the location of the dropdown.
   </div>
   <div class="btn-group">
     <button type="button" class="btn btn-secondary">Reference</button>
-    <button type="button" class="btn btn-secondary dropdown-toggle dropdown-toggle-split" id="dropdownMenuReference" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false" data-reference="parent">
+    <button type="button" class="btn btn-secondary dropdown-toggle dropdown-toggle-split" id="dropdownMenuReference" data-toggle="dropdown" aria-expanded="false" data-reference="parent">
       <span class="sr-only">Toggle Dropdown</span>
     </button>
     <div class="dropdown-menu" aria-labelledby="dropdownMenuReference">
@@ -803,7 +803,7 @@ Add `data-toggle="dropdown"` to a link or button to toggle a dropdown.
 
 {% highlight html %}
 <div class="dropdown">
-  <button id="dLabel" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+  <button id="dLabel" type="button" data-toggle="dropdown" aria-expanded="false">
     Dropdown trigger
   </button>
   <div class="dropdown-menu" aria-labelledby="dLabel">
diff --git a/site/docs/4.3/components/input-group.md b/site/docs/4.3/components/input-group.md
index cdbfa794a6..1e23e7f99a 100644
--- a/site/docs/4.3/components/input-group.md
+++ b/site/docs/4.3/components/input-group.md
@@ -199,7 +199,7 @@ Multiple add-ons are supported and can be mixed with checkbox and radio input ve
 {% capture example %}
 <div class="input-group mb-3">
   <div class="input-group-prepend">
-    <button class="btn btn-outline-secondary dropdown-toggle" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Dropdown</button>
+    <button class="btn btn-outline-secondary dropdown-toggle" type="button" data-toggle="dropdown" aria-expanded="false">Dropdown</button>
     <div class="dropdown-menu">
       <a class="dropdown-item" href="#">Action</a>
       <a class="dropdown-item" href="#">Another action</a>
@@ -214,7 +214,7 @@ Multiple add-ons are supported and can be mixed with checkbox and radio input ve
 <div class="input-group">
   <input type="text" class="form-control" aria-label="Text input with dropdown button">
   <div class="input-group-append">
-    <button class="btn btn-outline-secondary dropdown-toggle" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Dropdown</button>
+    <button class="btn btn-outline-secondary dropdown-toggle" type="button" data-toggle="dropdown" aria-expanded="false">Dropdown</button>
     <div class="dropdown-menu">
       <a class="dropdown-item" href="#">Action</a>
       <a class="dropdown-item" href="#">Another action</a>
@@ -233,7 +233,7 @@ Multiple add-ons are supported and can be mixed with checkbox and radio input ve
 <div class="input-group mb-3">
   <div class="input-group-prepend">
     <button type="button" class="btn btn-outline-secondary">Action</button>
-    <button type="button" class="btn btn-outline-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+    <button type="button" class="btn btn-outline-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-expanded="false">
       <span class="sr-only">Toggle Dropdown</span>
     </button>
     <div class="dropdown-menu">
@@ -251,7 +251,7 @@ Multiple add-ons are supported and can be mixed with checkbox and radio input ve
   <input type="text" class="form-control" aria-label="Text input with segmented dropdown button">
   <div class="input-group-append">
     <button type="button" class="btn btn-outline-secondary">Action</button>
-    <button type="button" class="btn btn-outline-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+    <button type="button" class="btn btn-outline-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-expanded="false">
       <span class="sr-only">Toggle Dropdown</span>
     </button>
     <div class="dropdown-menu">
diff --git a/site/docs/4.3/components/navbar.md b/site/docs/4.3/components/navbar.md
index 3405f8f67a..6c7cfc44ba 100644
--- a/site/docs/4.3/components/navbar.md
+++ b/site/docs/4.3/components/navbar.md
@@ -50,7 +50,7 @@ Here's an example of all the sub-components included in a responsive light-theme
         <a class="nav-link" href="#">Link</a>
       </li>
       <li class="nav-item dropdown">
-        <a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+        <a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-expanded="false">
           Dropdown
         </a>
         <div class="dropdown-menu" aria-labelledby="navbarDropdown">
@@ -187,7 +187,7 @@ You may also utilize dropdowns in your navbar nav. Dropdown menus require a wrap
         <a class="nav-link" href="#">Pricing</a>
       </li>
       <li class="nav-item dropdown">
-        <a class="nav-link dropdown-toggle" href="#" id="navbarDropdownMenuLink" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+        <a class="nav-link dropdown-toggle" href="#" id="navbarDropdownMenuLink" role="button" data-toggle="dropdown" aria-expanded="false">
           Dropdown link
         </a>
         <div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
diff --git a/site/docs/4.3/components/navs.md b/site/docs/4.3/components/navs.md
index 21375f18c1..80dd43d592 100644
--- a/site/docs/4.3/components/navs.md
+++ b/site/docs/4.3/components/navs.md
@@ -271,7 +271,7 @@ Add dropdown menus with a little extra HTML and the [dropdowns JavaScript plugin
     <a class="nav-link active" href="#">Active</a>
   </li>
   <li class="nav-item dropdown">
-    <a class="nav-link dropdown-toggle" data-toggle="dropdown" href="#" role="button" aria-haspopup="true" aria-expanded="false">Dropdown</a>
+    <a class="nav-link dropdown-toggle" data-toggle="dropdown" href="#" role="button" aria-expanded="false">Dropdown</a>
     <div class="dropdown-menu">
       <a class="dropdown-item" href="#">Action</a>
       <a class="dropdown-item" href="#">Another action</a>
@@ -298,7 +298,7 @@ Add dropdown menus with a little extra HTML and the [dropdowns JavaScript plugin
     <a class="nav-link active" href="#">Active</a>
   </li>
   <li class="nav-item dropdown">
-    <a class="nav-link dropdown-toggle" data-toggle="dropdown" href="#" role="button" aria-haspopup="true" aria-expanded="false">Dropdown</a>
+    <a class="nav-link dropdown-toggle" data-toggle="dropdown" href="#" role="button" aria-expanded="false">Dropdown</a>
     <div class="dropdown-menu">
       <a class="dropdown-item" href="#">Action</a>
       <a class="dropdown-item" href="#">Another action</a>
diff --git a/site/docs/4.3/components/scrollspy.md b/site/docs/4.3/components/scrollspy.md
index a4b0980dcf..71f6bfe736 100644
--- a/site/docs/4.3/components/scrollspy.md
+++ b/site/docs/4.3/components/scrollspy.md
@@ -33,7 +33,7 @@ Scroll the area below the navbar and watch the active class change. The dropdown
         <a class="nav-link" href="#mdo">@mdo</a>
       </li>
       <li class="nav-item dropdown">
-        <a class="nav-link dropdown-toggle" data-toggle="dropdown" href="#" role="button" aria-haspopup="true" aria-expanded="false">Dropdown</a>
+        <a class="nav-link dropdown-toggle" data-toggle="dropdown" href="#" role="button" aria-expanded="false">Dropdown</a>
         <div class="dropdown-menu">
           <a class="dropdown-item" href="#one">one</a>
           <a class="dropdown-item" href="#two">two</a>
@@ -70,7 +70,7 @@ Scroll the area below the navbar and watch the active class change. The dropdown
       <a class="nav-link" href="#mdo">@mdo</a>
     </li>
     <li class="nav-item dropdown">
-      <a class="nav-link dropdown-toggle" data-toggle="dropdown" href="#" role="button" aria-haspopup="true" aria-expanded="false">Dropdown</a>
+      <a class="nav-link dropdown-toggle" data-toggle="dropdown" href="#" role="button" aria-expanded="false">Dropdown</a>
       <div class="dropdown-menu">
         <a class="dropdown-item" href="#one">one</a>
         <a class="dropdown-item" href="#two">two</a>
diff --git a/site/docs/4.3/examples/jumbotron/index.html b/site/docs/4.3/examples/jumbotron/index.html
index 376e75e41c..3187c738b1 100644
--- a/site/docs/4.3/examples/jumbotron/index.html
+++ b/site/docs/4.3/examples/jumbotron/index.html
@@ -22,7 +22,7 @@ extra_css: "jumbotron.css"
         <a class="nav-link disabled" href="#">Disabled</a>
       </li>
       <li class="nav-item dropdown">
-        <a class="nav-link dropdown-toggle" href="#" id="dropdown01" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Dropdown</a>
+        <a class="nav-link dropdown-toggle" href="#" id="dropdown01" data-toggle="dropdown" aria-expanded="false">Dropdown</a>
         <div class="dropdown-menu" aria-labelledby="dropdown01">
           <a class="dropdown-item" href="#">Action</a>
           <a class="dropdown-item" href="#">Another action</a>
diff --git a/site/docs/4.3/examples/navbar-bottom/index.html b/site/docs/4.3/examples/navbar-bottom/index.html
index 97f7e0b5d5..19a37ee7e4 100644
--- a/site/docs/4.3/examples/navbar-bottom/index.html
+++ b/site/docs/4.3/examples/navbar-bottom/index.html
@@ -27,7 +27,7 @@ title: Bottom navbar example
         <a class="nav-link disabled" href="#">Disabled</a>
       </li>
       <li class="nav-item dropup">
-        <a class="nav-link dropdown-toggle" href="#" id="dropdown10" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Dropup</a>
+        <a class="nav-link dropdown-toggle" href="#" id="dropdown10" data-toggle="dropdown" aria-expanded="false">Dropup</a>
         <div class="dropdown-menu" aria-labelledby="dropdown10">
           <a class="dropdown-item" href="#">Action</a>
           <a class="dropdown-item" href="#">Another action</a>
diff --git a/site/docs/4.3/examples/navbars/index.html b/site/docs/4.3/examples/navbars/index.html
index a5e687bf54..197919d8aa 100644
--- a/site/docs/4.3/examples/navbars/index.html
+++ b/site/docs/4.3/examples/navbars/index.html
@@ -22,7 +22,7 @@ extra_css: "navbar.css"
         <a class="nav-link disabled" href="#">Disabled</a>
       </li>
       <li class="nav-item dropdown">
-        <a class="nav-link dropdown-toggle" href="#" id="dropdown01" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Dropdown</a>
+        <a class="nav-link dropdown-toggle" href="#" id="dropdown01" data-toggle="dropdown" aria-expanded="false">Dropdown</a>
         <div class="dropdown-menu" aria-labelledby="dropdown01">
           <a class="dropdown-item" href="#">Action</a>
           <a class="dropdown-item" href="#">Another action</a>
@@ -75,7 +75,7 @@ extra_css: "navbar.css"
         <a class="nav-link disabled" href="#">Disabled</a>
       </li>
       <li class="nav-item dropdown">
-        <a class="nav-link dropdown-toggle" href="#" id="dropdown03" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Dropdown</a>
+        <a class="nav-link dropdown-toggle" href="#" id="dropdown03" data-toggle="dropdown" aria-expanded="false">Dropdown</a>
         <div class="dropdown-menu" aria-labelledby="dropdown03">
           <a class="dropdown-item" href="#">Action</a>
           <a class="dropdown-item" href="#">Another action</a>
@@ -107,7 +107,7 @@ extra_css: "navbar.css"
         <a class="nav-link disabled" href="#">Disabled</a>
       </li>
       <li class="nav-item dropdown">
-        <a class="nav-link dropdown-toggle" href="#" id="dropdown04" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Dropdown</a>
+        <a class="nav-link dropdown-toggle" href="#" id="dropdown04" data-toggle="dropdown" aria-expanded="false">Dropdown</a>
         <div class="dropdown-menu" aria-labelledby="dropdown04">
           <a class="dropdown-item" href="#">Action</a>
           <a class="dropdown-item" href="#">Another action</a>
@@ -139,7 +139,7 @@ extra_css: "navbar.css"
         <a class="nav-link disabled" href="#">Disabled</a>
       </li>
       <li class="nav-item dropdown">
-        <a class="nav-link dropdown-toggle" href="#" id="dropdown05" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Dropdown</a>
+        <a class="nav-link dropdown-toggle" href="#" id="dropdown05" data-toggle="dropdown" aria-expanded="false">Dropdown</a>
         <div class="dropdown-menu" aria-labelledby="dropdown05">
           <a class="dropdown-item" href="#">Action</a>
           <a class="dropdown-item" href="#">Another action</a>
@@ -171,7 +171,7 @@ extra_css: "navbar.css"
         <a class="nav-link disabled" href="#">Disabled</a>
       </li>
       <li class="nav-item dropdown">
-        <a class="nav-link dropdown-toggle" href="#" id="dropdown06" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Dropdown</a>
+        <a class="nav-link dropdown-toggle" href="#" id="dropdown06" data-toggle="dropdown" aria-expanded="false">Dropdown</a>
         <div class="dropdown-menu" aria-labelledby="dropdown06">
           <a class="dropdown-item" href="#">Action</a>
           <a class="dropdown-item" href="#">Another action</a>
@@ -204,7 +204,7 @@ extra_css: "navbar.css"
           <a class="nav-link disabled" href="#">Disabled</a>
         </li>
         <li class="nav-item dropdown">
-          <a class="nav-link dropdown-toggle" href="#" id="dropdown07" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Dropdown</a>
+          <a class="nav-link dropdown-toggle" href="#" id="dropdown07" data-toggle="dropdown" aria-expanded="false">Dropdown</a>
           <div class="dropdown-menu" aria-labelledby="dropdown07">
             <a class="dropdown-item" href="#">Action</a>
             <a class="dropdown-item" href="#">Another action</a>
@@ -236,7 +236,7 @@ extra_css: "navbar.css"
         <a class="nav-link disabled" href="#">Disabled</a>
       </li>
       <li class="nav-item dropdown">
-        <a class="nav-link dropdown-toggle" href="#" id="dropdown08" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Dropdown</a>
+        <a class="nav-link dropdown-toggle" href="#" id="dropdown08" data-toggle="dropdown" aria-expanded="false">Dropdown</a>
         <div class="dropdown-menu" aria-labelledby="dropdown08">
           <a class="dropdown-item" href="#">Action</a>
           <a class="dropdown-item" href="#">Another action</a>
@@ -266,7 +266,7 @@ extra_css: "navbar.css"
           <a class="nav-link disabled" href="#" tabindex="-1" aria-disabled="true">Disabled</a>
         </li>
         <li class="nav-item dropdown">
-          <a class="nav-link dropdown-toggle" href="#" id="dropdown09" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Dropdown</a>
+          <a class="nav-link dropdown-toggle" href="#" id="dropdown09" data-toggle="dropdown" aria-expanded="false">Dropdown</a>
           <div class="dropdown-menu" aria-labelledby="dropdown09">
             <a class="dropdown-item" href="#">Action</a>
             <a class="dropdown-item" href="#">Another action</a>
@@ -297,7 +297,7 @@ extra_css: "navbar.css"
           <a class="nav-link disabled" href="#" tabindex="-1" aria-disabled="true">Disabled</a>
         </li>
         <li class="nav-item dropdown">
-          <a class="nav-link dropdown-toggle" href="#" id="dropdown10" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Dropdown</a>
+          <a class="nav-link dropdown-toggle" href="#" id="dropdown10" data-toggle="dropdown" aria-expanded="false">Dropdown</a>
           <div class="dropdown-menu" aria-labelledby="dropdown10">
             <a class="dropdown-item" href="#">Action</a>
             <a class="dropdown-item" href="#">Another action</a>
diff --git a/site/docs/4.3/examples/offcanvas/index.html b/site/docs/4.3/examples/offcanvas/index.html
index 015d1df321..662ab2d47d 100644
--- a/site/docs/4.3/examples/offcanvas/index.html
+++ b/site/docs/4.3/examples/offcanvas/index.html
@@ -27,7 +27,7 @@ body_class: "bg-light"
         <a class="nav-link" href="#">Switch account</a>
       </li>
       <li class="nav-item dropdown">
-        <a class="nav-link dropdown-toggle" href="#" id="dropdown01" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Settings</a>
+        <a class="nav-link dropdown-toggle" href="#" id="dropdown01" data-toggle="dropdown" aria-expanded="false">Settings</a>
         <div class="dropdown-menu" aria-labelledby="dropdown01">
           <a class="dropdown-item" href="#">Action</a>
           <a class="dropdown-item" href="#">Another action</a>
diff --git a/site/docs/4.3/examples/starter-template/index.html b/site/docs/4.3/examples/starter-template/index.html
index d90f50b85f..819f9d919a 100644
--- a/site/docs/4.3/examples/starter-template/index.html
+++ b/site/docs/4.3/examples/starter-template/index.html
@@ -22,7 +22,7 @@ extra_css: "starter-template.css"
         <a class="nav-link disabled" href="#" tabindex="-1" aria-disabled="true">Disabled</a>
       </li>
       <li class="nav-item dropdown">
-        <a class="nav-link dropdown-toggle" href="#" id="dropdown01" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Dropdown</a>
+        <a class="nav-link dropdown-toggle" href="#" id="dropdown01" data-toggle="dropdown" aria-expanded="false">Dropdown</a>
         <div class="dropdown-menu" aria-labelledby="dropdown01">
           <a class="dropdown-item" href="#">Action</a>
           <a class="dropdown-item" href="#">Another action</a>