JSFiddle - React, Tailwind, and code Playground

HTML

<button type="button" class="btn btn-info btn-lg" data-toggle="modal" data-target="#myModal">Open Modal</button>


<!-- Modal -->
<div id="myModal" class="modal fade" role="dialog">
  <div class="modal-dialog">

    <!-- Modal content-->
    <div class="modal-content">
      <div class="modal-header">
        <button type="button" class="close" data-dismiss="modal">&times;</button>
        <h4 class="modal-title">Modal Header</h4>
      </div>
      <div class="modal-body">
       <div class="user">
<input type="text" />
<input type="text" />
<input type="text" />
<input type="text" />
<input type="text" />
<input type="text" id="name" style="background:#fff"/>
</div>

      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
      </div>
    </div>

  </div>
</div>

CSS

.panel {margin-top:18px;}
.panel-body table {
  width: 100%;
}

.panel-body {
  font-size: 16px;
}

JavaScript

$('#myModal').on('shown.bs.modal', function(){  

				$('.user').find('#name').css('background',"blue");
				
});

$('#myModal').on('hidden.bs.modal', function(){  

				$('.user').find('#name').css('background',"#fff");
				
});