JSFiddle - React, Tailwind, and code Playground

HTML

<h3></h3>

CSS

iframe {
    width: 500px;
    height: 800px;
    border: 5px solid green;
}

JavaScript

$(document).ready(function() {
    $('h3').html('Loading PDF...');
    
    $(document).load(function() {
        $('h3').html('PDF has loaded!');
    });
    
});