bootstrap_modal.html

<h1>modal demo</h1>

<div class="modal fade" id="modal1" role="dialog">
  <div class="modal-dialog">
    <div class="modal-content">
      <div class="modal-header">
        <h4 class="modal-title">Modal Title</h4>
      </div>
      <div class="modal-body">
        Modal Body>
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-primary" data-dismiss="modal">Close</button>
      </div>
    </div>
  </div>
</div>

<div class="container">
  <button class="btn btn-link" data-toggle="modal" data-target="#modal1">
    Open modal1
  </button>
</div>