JSFiddle - React, Tailwind, and code Playground

HTML

<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap-theme.min.css">
<button name="openModalOne">Open 1</button>
<div id="modalone" class="modal" role="dialog" >
    <div class="modal-dialog modal-lg">
        <div class="modal-content">
            <div class="modal-header">
                <h3>Modal 1</h3>
            </div>
            <div class="modal-body" style="height: 2000px">
                <button name="stackone">Stack me</button>
            </div>
            <div class="modal-footer">
                <button name="closeone">Button 1</button>
            </div>
        </div>
    </div>
</div>
<div id="modaltwo" class="modal" role="dialog" >
    <div class="modal-dialog modal-lg">
        <div class="modal-content">
            <div class="modal-header">
                <h3>Modal 1</h3>
            </div>
            <div class="modal-body">
                This is a stacked modal            
            </div>
            <div class="modal-footer">
                <button name="closetwo">Close</button>
            </div>
        </div>
    </div>
</div>

JavaScript

$(document).ready(function(){
   $('.modal').on('hidden.bs.modal', function( event ) {
		$(this).removeClass('fv-modal-stack');
		$('body').data( 'fv_open_modals', $('body').data('fv_open_modals')-1);
	});
	
	$('.modal').on('shown.bs.modal', function(){
		if ( typeof ( $("body").data( 'fv_open_modals' ) ) == 'undefined')
		{
			$('body').data( 'fv_open_modals', 0 );
		}
		if($(this).hasClass('fv-modal-stack'))
		{
			return;
		}
		$(this).addClass('fv-modal-stack');
		$('body').data('fv_open_modals', $('body').data('fv_open_modals')+1);
		$(this).css('z-index', 1040 +(10*$('body').data('fv_open_modals')));
		$('.modal-backdrop').not('.fv-modal-stack')
			.css('z-index', 1039 + (10*$('body').data('fv_open_modals')));
		$('.modal-backdrop').not('fv-modal-stack')
			.addClass('fv-modal-stack');
	}); 
    
    $("button[name='openModalOne']").on('click', function(){
        $("#modalone").modal('show'); 
    });
    
    $("button[name='stackone']").on('click', function(){
       $("#modaltwo").modal('show');
    });
    $("button[name='closetwo']").on('click', function(){
       $("#modaltwo").modal('hide');
    });
    $("button[name='closeone']").on('click', function(){
       $("#modalone").modal('hide');
    });
});