JSFiddle - React, Tailwind, and code Playground
HTML
<div id="DIVinPage"></div>
JavaScript
$(function() {
$('#DIVinPage').html('<iframe id="MyIFRAME" src="http://mgeospatial.com/database.pdf" width="90%" height="600" frameborder="0" scrolling="no" style="overflow-x: hidden"></iframe>');
$('#MyIFRAME').unbind('load');
$('#MyIFRAME').load(function() {
alert('will alert when all elements in the frame are done');
});
});