JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<button class="btn btn-default notesButton" data-toggle="modal" data-target="#notesModal" data-id="your custom id 1"
role="button">Notes 1</button>
<button class="btn btn-default notesButton" data-toggle="modal" data-target="#notesModal" data-id="your custom id 2"
role="button">Notes 2</button>

<div id="notesModal" 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">Order Notes</h4>
        </div>
        <div class="modal-body">

          <?php echo $myOrderId; ?>              

        </div>
    </div>
    </div>
</div> <!-- end modal -->

JavaScript

$("#notesModal").on("show.bs.modal", function(evt) {
    var $btn = $(evt.relatedTarget);
    var $modal = $(evt.target);
    var $content = $modal.find(".modal-body");

    $content.text( $btn.data("id") );
});