JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css">
<script src="//netdna.bootstrapcdn.com/bootstrap/3.0.0/js/bootstrap.min.js"></script>
<!-- Button trigger modal -->
<button class="btn btn-primary btn-lg" data-toggle="modal" data-target="#myModal">
  Launch demo modal
</button>

<!-- Modal -->
<div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
  <div class="modal-dialog">
    <div class="modal-content">
        <div class="modal-header">
            <button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
            <h2 class="modal-title">Add new page</h2>
        </div>
        <div class="modal-body">
            <form class="form-horizontal add-new-page-form">
                <fieldset>
                    <!-- Label -->
                    <div class="form-group">
                      <label class="col-md-4 control-label" for="labelInput">Label</label>
                      <div class="col-md-5">
                      <input id="labelInput" name="labelInput" type="text" data-field="label" class="form-control input-md">
                      <span class="help-block">Page label</span>
                      </div>
                    </div>
        
                    <!-- Button (Double) -->
                    <div class="form-group">
                        <label class="col-md-4 control-label" for="closeBtn"></label>
                        <div class="col-md-8">
                            <button id="closeBtn" name="closeBtn" class="btn btn-default" data-dismiss="modal">Close</button>
                            <input type="submit" id="saveBtn" name="saveBtn" class="btn btn-primary add-page" value="Add">
                        </div>
                    </div>
                </fieldset>
            </form>
        </div>
     </div>
  </div>
</div>

CSS

.jumbotron {
    margin: 0 10px;
}

JavaScript

$("form").on("submit", function () {
    alert("foo");
    return false;
});