JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/js/bootstrap.min.js"></script>
<!-- Trigger the modal with a button -->
<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">
        <table class="table table-scroll table-striped" aurelia-table="">
          <thead>
            <tr>
              <th>Time</th>
              <th>Event</th>
              <th>Description</th>
            </tr>
          </thead>
          <tbody>
            <tr>
              <td>00:00:00<i class="fa fa-clock-o pull-right" aria-hidden="true"></i></td>
              <td>
                Call 3:00pm<i class="fa fa-clock-o pull-right" aria-hidden="true"></i>
              </td>
              <td>
                Rwwwwwwwwww
              </td>
            </tr>
            <tr>
              <td>00:00:00<i class="fa fa-clock-o pull-right" aria-hidden="true"></i></td>
              <td>
                Call  3:00pm<i class="fa fa-clock-o pull-right" aria-hidden="true"></i>
              </td>
              <td>
                wwwwwww
              </td>
            </tr>
                     <tr>
              <td>00:00:00<i class="fa fa-clock-o pull-right" aria-hidden="true"></i></td>
              <td>
                Call  3:00pm<i class="fa fa-clock-o pull-right" aria-hidden="true"></i>
              </td>
              <td>
           ...

CSS

.table-scroll thead {
  display: block;
    width: calc(100% - 90px);
}
.table-scroll tbody {
overflow-y: scroll;
    display: block;
    height: calc(100vh - 346px);
    width: calc(100% - 70px);
}

.table-scroll tr {
  width: 100%;
  table-layout: fixed;
  display: inline-table;
}

.table-scroll thead > tr > th {
  border: none;
}