Button Group
<div class="btn-group" role="group" aria-label="Basic example">  <button type="button" class="btn btn-dark">Left</button>  <button type="button" class="btn btn-dark">Middle</button>  <button type="button" class="btn btn-dark">Right</button></div>
<div class="btn-group" role="group" aria-label="Basic example">  <button type="button" class="btn btn-primary">    <i class="ti-control-pause"></i>  </button>  <button type="button" class="btn btn-success">    <i class="ti-control-play"></i>  </button>  <button type="button" class="btn btn-warning">    <i class="ti-control-forward"></i>  </button></div>
<div class="btn-toolbar" role="toolbar" aria-label="Toolbar with button groups">  <div class="btn-group mr-2" role="group" aria-label="First group">    <button type="button" class="btn btn-dark">1</button>    <button type="button" class="btn btn-dark">2</button>    <button type="button" class="btn btn-dark">3</button>    <button type="button" class="btn btn-dark">4</button>  </div>  <div class="btn-group mr-2" role="group" aria-label="Second group">    <button type="button" class="btn btn-dark">5</button>    <button type="button" class="btn btn-dark">6</button>    <button type="button" class="btn btn-dark">7</button>  </div>  <div class="btn-group" role="group" aria-label="Third group">    <button type="button" class="btn btn-dark">8</button>  </div></div>
<div class="btn-group btn-group-lg" role="group" aria-label="Large button group">  <button type="button" class="btn btn-dark">Left</button>  <button type="button" class="btn btn-dark">Middle</button>  <button type="button" class="btn btn-dark">Right</button></div><div class="btn-group" role="group" aria-label="Default button group">  <button type="button" class="btn btn-dark">Left</button>  <button type="button" class="btn btn-dark">Middle</button>  <button type="button" class="btn btn-dark">Right</button></div><div class="btn-group btn-group-sm" role="group" aria-label="Small button group">  <button type="button" class="btn btn-dark">Left</button>  <button type="button" class="btn btn-dark">Middle</button>  <button type="button" class="btn btn-dark">Right</button></div>
<div class="btn-group" role="group" aria-label="Button group with nested dropdown">  <button type="button" class="btn btn-dark">1</button>  <button type="button" class="btn btn-dark">2</button>  <div class="btn-group" role="group">    <button id="btnGroupDrop1" type="button" class="btn btn-dark dropdown-toggle"            data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">      Dropdown    </button>    <div class="dropdown-menu" aria-labelledby="btnGroupDrop1">      <a class="dropdown-item" href="#">Dropdown link</a>      <a class="dropdown-item" href="#">Dropdown link</a>    </div>  </div></div>
<div class="btn-group-vertical" role="group" aria-label="Vertical button group">  <button type="button" class="btn btn-primary">    <i class="fa fa-cloud-upload"></i>  </button>  <button type="button" class="btn btn-primary">    <i class="fa fa-calendar"></i>  </button>  <button type="button" class="btn btn-primary">    <i class="fa fa-database"></i>  </button>  <button type="button" class="btn btn-primary">    <i class="fa fa-cog"></i>  </button>  <button type="button" class="btn btn-primary">    <i class="fa fa-heart-o"></i>  </button>  <button type="button" class="btn btn-primary">    <i class="fa fa-share"></i>  </button></div>