jsPDF Library in Articulate Storyline

function addJsPDF(callback) {
  if (typeof jsPDF === 'undefined') {
    var confettiScript = document.createElement('script');
    confettiScript.src = 'https://cdnjs.cloudflare.com/ajax/libs/jspdf/1.5.3/jspdf.debug.js';
    confettiScript.async = true;
    confettiScript.onload = callback;
    document.head.appendChild(confettiScript);
  } else {
    callback();
  }
}
addJsPDF();