rickya4a

//html

<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
  <span class="sr-only">Toggle navigation</span>
  <span class="icon-bar top-bar"></span>
  <span class="icon-bar middle-bar"></span>
  <span class="icon-bar bottom-bar"></span>
</button>