JSFiddle - React, Tailwind, and code Playground

HTML

<button type="button" class="btn">Change Src</button>
<div>
    <embed id="viewer" src="http://www.education.gov.yk.ca/pdf/pdf-test.pdf" width="500" height="680"></embed>
</div>

JavaScript

$(document).ready(function() {
        "use strict";
        $('.btn').click(function() {
            //var idToSRC = './HTA_' + this.id + '.pdf';
            var idToSRC = "http://www.reservoirminerals.com/files/doc_downloads/test.pdf";
            var $viewerDiv = $('#viewer').parent();          
            var viewerClone = $('#viewer').clone().attr('src', idToSRC);
            $viewerDiv.html(viewerClone);
        }); });