JSFiddle - React, Tailwind, and code Playground

HTML

<tr>
  <td>jsmith22</td>
  <td>John Smith</td>
  <td>555-555-5555</td>
  <td>test@gmail.com</td>
  <td>
    <button type="button" class="btn btn-default btn-lg btn-block roster-button active" data-toggle="modal" data-target="#removeUser" data-id="jsmith22">Remove</button>
  </td>
</tr>
<div aria-labelledby="myModalLabel" class="modal fade" id="removeUser" role="dialog" tabindex="-1">
  <div class="modal-dialog" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <h4 class="modal-title">Remove Employee</h4>
      </div>
      <div class="modal-body">
        <p>Are you sure you wish to remove this user?</p>
      </div>
      <div class="modal-footer">
        <button class="btn btn-default" data-dismiss="modal" type="button">Cancel</button>
        <button class="btn btn-danger" id="remove-button" type="submit">Remove</button>
      </div>
    </div>
    <!-- end modal-content -->
  </div>
  <!-- end modal-dialog -->
</div>
<!-- end modal -->

JavaScript

$(document).ready(function() {
	  var delid = '';
	  $('#removeUser').on('show.bs.modal', function(e) {
	    delid = $(e.relatedTarget).data('id');
	    alert(delid);
	  });

	  $('#remove-button').click(function() {
	    alert(delid);
	    //Do what ever you like to do
	    //$.post('/API/removeUser', {} );
	  });
	});