JSFiddle - React, Tailwind, and code Playground

HTML

<div class="row">
  <div class="deal-mode col-md-6">
    <div class="panel-group" id="accordion">
      <div class="panel panel-default">
        <div class="panel-heading">
          <h4 class="panel-title">
                    <a class="click" id="click-joan" data-toggle="collapse" data-parent="#accordion" href="#collapseOne">1. Joan</a>
                </h4>
        </div>
        <div id="collapseOne" class="panel-collapse collapse in">
          <div class="panel-body">
            <p>Content</p>
          </div>
        </div>
      </div>
      <div class="panel panel-default">
        <div class="panel-heading">
          <h4 class="panel-title">
                    <a class="click" id="click-kelvin" data-toggle="collapse" data-parent="#accordion" href="#collapseTwo">2. Kelvin</a>
                </h4>
        </div>
        <div id="collapseTwo" class="panel-collapse collapse">
          <div class="panel-body">
            <p>Content</p>
          </div>
        </div>
      </div>
      <div class="panel panel-default">
        <div class="panel-heading">
          <h4 class="panel-title">
                    <a class="click" id="click-may" data-toggle="collapse" data-parent="#accordion" href="#collapseThree">3. May</a>
                </h4>
        </div>
        <div id="collapseThree" class="panel-collapse collapse">
          <div class="panel-body">
            <p>Content</p>
          </div>
        </div>
      </div>
    </div>
  </div>

  <div class="col-md-6 wrap-chat-room">
    <div id="chat-joan" class="chat-room">
      <p>Chat With Joan</p>
    </div>
    <div id="chat-kelvin" class="chat-room">
      <p>Chat With Kelvin</p>
    </div>
    <div id="chat-may" class="chat-room">
      <p>Chat With May</p>
    </div>
  </div>
</div>

CSS

.row {
  padding: 0 2%;
}

.col-md-6 {
  width: 46%;
  padding: 2%;
  float: left;
}

.chat-room {
  display: none;
}

JavaScript

$(document).ready(function() {
  $('.wrap-chat-room').css('border', '1px solid red');
  $('#chat-joan').fadeIn();

  $(".click").click(function() {
    var id = '#' + $(this).attr('id').replace('click', 'chat');
    $('[id^=chat]').fadeOut();
    $(id).fadeIn();
  });
});