JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/js/bootstrap.min.js"></script>
<button class="btn btn-primary btn-lg" data-toggle="modal" data-target="#myModal">Open demo modal</button>
<div class="modal" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="false">
    <div class="modal-dialog modal-sm">
        <div class="modal-content">
            <div class="modal-header">
                <button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
                 <h4 class="modal-title" id="myModalLabel">Demo Modal</h4>
            </div>
            <div class="modal-body">
                <p>
                    <a href="#" data-toggle="modal" data-target="#uploadImage" class="btn btn-primary">Upload image</a>
                </p>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
            </div>
        </div>
    </div>
    
</div>
<div class="modal" id="uploadImage" tabindex="-1" role="dialog" aria-labelledby="uploadImage-title" aria-hidden="true">
        <div class="modal-dialog modal-sm">
            <div class="modal-content">
                <div class="modal-header">
                    <button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
                     <h4 class="modal-title" id="uploadImage-title">Upload new image</h4>
                </div>
                <div class="modal-body">
                    Testing Area
                </div>
                <div class="modal-footer">                
                    <button type="button" class="btn btn-default" id="btnUploadCancel">Cancel</button>
                    <button type="button" class="btn btn-success">Accept</button>
                </div>
            </div>
       ...

JavaScript

$('#btnUploadCancel').click(function () {
    $('#uploadImage').modal('toggle');
});

$(document).on('hidden.bs.modal', '#myModal', function () {
    alert("hello");
});

$(document).on('hidden.bs.modal', '#uploadImage', function () {
    alert("goodbye");
});