JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">
<script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">
<div class="col-xs-3">
  <div id="panel4" class="panel panel-primary">
    <div class="panel-heading panel4">
      #panel4
    </div>
  </div>
</div>


<a class="btn btn-default" id="button" href="#" role="button">Link</a>

CSS

#button {
  outline: none;
}
#panel4 .panel4 {
  color: white;
}

JavaScript

//playing around with panels and buttons in schedule tab
$(document).ready(function(){
  $('#button').on('click', function() {
    $('#panel4').find('.panel4').css({
      'color': 'red'
    });
  });
});