Bootstrap Button Dropdowns

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This chapter will discuss about how to add dropdown menu to buttons using Bootstrap classes. To add a dropdown to a button, simply wrap the button and dropdown menu in a .btn-group. You can also use <span class="caret"></span> to act as an indicator that the button is a dropdown.

The following example demonstrates a basic single button dropdowns:

<div class="btn-group">
   <button type="button" class="btn btn-default dropdown-toggle" 
      data-toggle="dropdown">
      Default <span class="caret"></span>
   </button>
   <ul class="dropdown-menu" role="menu">
      <li><a href="#">Action</a></li>
      <li><a href="#">Another action</a></li>
      <li><a href="#">Something else here</a></li>
      <li class="divider"></li>
      <li><a href="#">Separated link</a></li>
   </ul>
</div>
<div class="btn-group">
   <button type="button" class="btn btn-primary dropdown-toggle" 
      data-toggle="dropdown">
      Primary <span class="caret"></span>
   </button>
   <ul class="dropdown-menu" role="menu">
      <li><a href="#">Action</a></li>
      <li><a href="#">Another action</a></li>
      <li><a href="#">Something else here</a></li>
      <li class="divider"></li>
      <li><a href="#">Separated link</a></li>
   </ul>
</div>
Basic Button Dropdown Demo

Split Button Dropdowns

Split button dropdowns use the same general style as the dropdown button but add a primary action along with the dropdown. Split buttons have the primary action on the left and a toggle on the right that displays the dropdown.

<div class="btn-group">
   <button type="button" class="btn btn-default">Default</button>
   <button type="button" class="btn btn-default dropdown-toggle" 
      data-toggle="dropdown">
      <span class="caret"></span>
      <span class="sr-only">Toggle Dropdown</span>
   </button>
   <ul class="dropdown-menu" role="menu">
      <li><a href="#">Action</a></li>
      <li><a href="#">Another action</a></li>
      <li><a href="#">Something else here</a></li>
      <li class="divider"></li>
      <li><a href="#">Separated link</a></li>
   </ul>
</div>
<div class="btn-group">
   <button type="button" class="btn btn-primary">Primary</button>
   <button type="button" class="btn btn-primary dropdown-toggle" 
      data-toggle="dropdown">
      <span class="caret"></span>
      <span class="sr-only">Toggle Dropdown</span>
   </button>
   <ul class="dropdown-menu" role="menu">
      <li><a href="#">Action</a></li>
      <li><a href="#">Another action</a></li>
      <li><a href="#">Something else here</a></li>
      <li class="divider"></li>
      <li><a href="#">Separated link</a></li>
   </ul>
</div>
Split Button Dropdown Demo

Button Dropdown Size

You can use the dropdowns with any button size: .btn-large, .btn-sm, or .btn-xs.

<div class="btn-group">
   <button type="button" class="btn btn-default dropdown-toggle btn-lg" 
      data-toggle="dropdown">
      Default <span class="caret"></span>
   </button>
   <ul class="dropdown-menu" role="menu">
      <li><a href="#">Action</a></li>
      <li><a href="#">Another action</a></li>
      <li><a href="#">Something else here</a></li>
      <li class="divider"></li>
      <li><a href="#">Separated link</a></li>
   </ul>
</div>
<div class="btn-group">
   <button type="button" class="btn btn-primary dropdown-toggle btn-sm" 
      data-toggle="dropdown">
      Primary <span class="caret"></span>
   </button>
   <ul class="dropdown-menu" role="menu">
      <li><a href="#">Action</a></li>
      <li><a href="#">Another action</a></li>
      <li><a href="#">Something else here</a></li>
      <li class="divider"></li>
      <li><a href="#">Separated link</a></li>
   </ul>
</div>
<div class="btn-group">
   <button type="button" class="btn btn-success dropdown-toggle btn-xs" 
      data-toggle="dropdown">
      Success <span class="caret"></span>
   </button>
   <ul class="dropdown-menu" role="menu">
      <li><a href="#">Action</a></li>
      <li><a href="#">Another action</a></li>
      <li><a href="#">Something else here</a></li>
      <li class="divider"></li>
      <li><a href="#">Separated link</a></li>
   </ul>
</div>
Size of Dropdown Button Demo

Dropup variation

Menus can also be built to drop up rather than down. To achieve this, simply add .dropup to the parent .btn-group container.

<div class="row" style="margin-left:50px; margin-top:200px">
   <div class="btn-group dropup">
      <button type="button" class="btn btn-default dropdown-toggle" 
         data-toggle="dropdown">
         Default <span class="caret"></span>
      </button>
      <ul class="dropdown-menu" role="menu">
         <li><a href="#">Action</a></li>
         <li><a href="#">Another action</a></li>
         <li><a href="#">Something else here</a></li>
         <li class="divider"></li>
         <li><a href="#">Separated link</a></li>
      </ul>
   </div>
   <div class="btn-group dropup">
      <button type="button" class="btn btn-primary dropdown-toggle" 
         data-toggle="dropdown">
         Primary <span class="caret"></span>
      </button>
      <ul class="dropdown-menu" role="menu">
         <li><a href="#">Action</a></li>
         <li><a href="#">Another action</a></li>
         <li><a href="#">Something else here</a></li>
         <li class="divider"></li>
         <li><a href="#">Separated link</a></li>
      </ul>
   </div>
</div>
Dropup Variation Demo


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