JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
<div class="bs-example">
    <div class="btn-group btn-group-justified">
      <div class="btn-group btn-group-lg">
        <button type="button" class="btn btn-default">Default</button>
        <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
          <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><!-- /btn-group -->
      <div class="btn-group btn-group-lg">
        <button type="button" class="btn btn-primary">Primary</button>
        <button type="button" class="btn btn-primary dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
          <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><!-- /btn-group -->
      <div class="btn-group btn-group-lg">
        <button type="button" class="btn btn-success">Success</button>
        <button type="button" class="btn btn-success 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...

CSS

body{padding:50px;}.btn-group-justified{ margin:10px 0;}
/*fix justified split button dropdowns*/
.btn-group-justified > .btn-group > .btn:first-child {
  margin-right: -100%;
}
.btn-group-justified > .btn-group > .btn + .dropdown-toggle {
  z-index: 3;
  float: right;
  width: auto;
}
.btn-group-justified > .btn-group:last-child > .btn:first-child {
  border-top-right-radius: 6px;
  border-bottom-right-radius: 6px;
}