<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <title>Cantara PPTX export</title>
    <script src="pptxgen.bundle.js"></script>

    <script type="text/javascript">
    let pres = new PptxGenJS();

    pres.author = "Cantara";
    pres.layout = "LAYOUT_16x9";

    pres.defineSlideMaster({
      title: "SlideWithSpoiler",
      objects: [
        { placeholder: {
          options: { name: "maincontent", type: "body", x: 0, y: 0, w: 10, h: 3.5, align: "center", valign: "middle", aut